CN212326770U - Multifunctional electric wheelchair bed - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a multifunctional electric wheelchair bed, which comprises a backrest component, a seat frame component, a leg plate component and a pedal component which are sequentially hinged, wherein handrail mechanisms are symmetrically arranged on two sides of the seat frame component, a mounting frame is arranged at the bottom of the seat frame component, a driving wheel and a driven wheel are arranged on the mounting frame, a first electric cylinder is arranged at the bottom of the seat frame component and used for simultaneously folding or unfolding the wheelchair bed and storing the handrail components, the multifunctional electric wheelchair bed also comprises a third electric cylinder, a shear type lifting piece with a bearing frame arranged at the top, a lifting diagonal bracing component consisting of a central adjusting shaft arranged on the bearing frame, a centering frame, a fourth electric cylinder and a fifth electric cylinder, the third electric cylinder is used for folding or unfolding the shear type lifting piece to adjust the height of the wheelchair bed, and the fourth electric cylinder is used for controlling the seat frame component to deflect in a vertical plane, the fifth electric cylinder is used for driving the wheelchair bed to rotate when the wheelchair bed is unfolded; and the anti-overturning wheel is used for supporting the rest parts together with the driving wheel and the driven wheel.

Description

Multifunctional electric wheelchair bed

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a multi-functional electronic wheelchair bed.

Background

The electric wheelchair bed is an auxiliary device for providing sitting, lying or walking for the old or the user with mobility disability, and has important significance for improving the self-care capability of the old and the user with mobility disability and improving the household life quality of the user and the user family.

However, the conventional electric wheelchair bed has a simple structure and a single function, and can only realize the adjustment of walking, sitting, lying and sitting or lying postures of a user, and the electric wheelchair bed is mainly suitable for the walking movement on a flat ground; in the folding or unfolding process of the traditional electric wheelchair bed, the handrails are easy to hang clothes of a user or press limbs of the user, so that safety accidents are caused, and potential safety threats exist in daily use of the wheelchair bed; the backrest plate and the leg plate of the traditional wheelchair bed are controlled by different mechanisms, and need to be adjusted independently in the folding or unfolding process of the wheelchair bed, and the shape adjusting process of the wheelchair bed is complex, so that the folding or unfolding efficiency of the wheelchair bed is not improved.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a multifunctional electric wheelchair bed aiming at the technical problems of single function, poor use safety and low form adjustment efficiency of the wheelchair bed.

A multifunctional electric wheelchair bed comprises a backrest component, a seat frame component, a leg plate component and a pedal plate component which are sequentially hinged and formed with a sitting surface, wherein handrail mechanisms are symmetrically arranged on two sides of the seat frame component, a mounting frame is arranged at the bottom of the seat frame component, a driving wheel and a driven wheel are arranged on the mounting frame, a first electric cylinder hinged with the backrest component is mounted at the bottom of the seat frame component, a backrest support rod is hinged on one surface of the backrest component, which faces the sitting surface, and the tail end of the backrest support rod is hinged with a connecting rod; a pull rod connected with the connecting rod through a hinge is hinged to the leg plate assembly, a second electric cylinder is mounted on the leg plate assembly, and a push rod connected with the second electric cylinder through a hinge is hinged to the pedal plate assembly;

the armrest mechanism comprises a limiting frame, an armrest connecting rod and a crank which are sequentially hinged, the limiting frame is hinged with the backrest component, an armrest which can rotate on a vertical plane and a vertical plane with the vertical plane is arranged in the limiting frame, and one end, far away from the armrest connecting rod, of the crank is hinged with the seat frame component;

the first electric cylinder stretches and contracts and drives the backrest component to rotate, and then the backrest support rod, the connecting rod, the pull rod, the leg plate component and the seat frame component are sequentially driven to rotate relative to the backrest component so as to fold or unfold the wheelchair bed; when the first electric cylinder stretches, the limiting frame, the armrest connecting rod and the crank are accommodated or unfolded under the combined action of the backrest component and the seat frame component;

the wheelchair comprises a wheelchair bed, and is characterized by further comprising a scissor type lifting piece, a lifting inclined strut assembly, wherein a bearing frame is arranged at the top of the scissor type lifting piece, the scissor type lifting piece is rotatably installed at the center adjusting shaft of the bearing frame, an aligning frame, a fourth electric cylinder and a fifth electric cylinder, the third electric cylinder is accommodated in the bottom of the mounting frame and is hinged with the scissor type lifting piece for folding or unfolding the scissor type lifting piece to adjust the horizontal height of the wheelchair bed, the aligning frame is rotatably connected with the center adjusting shaft and the seat frame assembly respectively and is provided with a transmission rod connected with a crank hinge, the fourth electric cylinder is adjacent to the joint of the seat frame assembly and the backrest assembly and is hinged with the aligning frame, the output end of the fourth electric cylinder is hinged with the mounting frame and is used for driving the aligning frame and the seat frame assembly to deflect in a vertical plane, and the fifth electric cylinder is arranged in the aligning frame and is hinged with the seat frame assembly, the wheelchair bed is driven to rotate when being unfolded;

and the anti-overturning wheel is used for supporting other components together with the driving wheel and the driven wheel.

In one of them embodiment, spacing including being first pterygoid lamina and the second pterygoid lamina that the contained angle set up, it is provided with the stopper to rotate on the first pterygoid lamina, the handrail with stopper hinged joint and first pterygoid lamina with swing in the spacing space that the second pterygoid lamina pressed from both sides.

In one embodiment, the armrest mechanism further includes a connecting member, a clamping groove matched with the connecting member is formed in one surface of the limiting frame, which is adjacent to the backrest assembly, and the connecting member is clamped in the clamping groove and is respectively hinged to the backrest assembly and the armrest connecting rod.

In one embodiment, the driving wheel comprises a power input shaft driven by a driving motor, a power output shaft matched with the power input shaft and a wheel rotating coaxially with the power output shaft, a stepped hole is arranged at one end of the power input shaft far away from the power output shaft, a thrust bearing positioning threaded ring in threaded connection with the inner surface of the power input shaft is arranged in the stepped hole, a shaft pressing screw rod which is in threaded connection with the thrust bearing positioning threaded ring is arranged on the thrust bearing positioning threaded ring in a penetrating way, a thrust bearing which is abutted against the inner surface of the stepped hole is arranged at one end of the shaft pressing screw rod, which is positioned in the stepped hole, the thrust bearing is installed on the pressure shaft screw rod through a locking nut, and the pressure shaft screw rod is used for pushing the power input shaft to be connected with the power output shaft or pulling the power input shaft away from the power output shaft through the thrust bearing positioning threaded ring under the action of external force.

In one embodiment, a reinforcing member is mounted on the outer surface of the power output shaft, and a damping spring is arranged on the reinforcing member and connected with the bottom of the mounting frame.

In one embodiment, an operation panel with a plurality of buttons is arranged on the outer side surface of the handrail and is used for controlling the electric cylinders and the driving motor to work.

In one embodiment, the scissor type lifting piece comprises a lifting rod and support rod groups symmetrically arranged on two sides of the lifting rod, each support rod group comprises a support piece formed by two support rods which are arranged in a crossed mode and connected through hinges or a plurality of support pieces connected through hinges, and the middle of the lifting rod is connected with the output end of the third electric cylinder through hinges.

In one embodiment, the backrest assembly, the seat frame assembly, the leg plate assembly and the pedal plate assembly respectively comprise a framework and a supporting plate, and each supporting plate is correspondingly installed on the corresponding framework and is respectively provided with a plurality of ventilation holes.

In one embodiment, a cushion is disposed on each of the support plates.

In one embodiment, a pushing handle is arranged on the side, opposite to the sitting surface, of the backrest assembly.

The multifunctional electric wheelchair bed of the utility model can be folded or unfolded by the extension and contraction of the first electric cylinder, thereby realizing the sitting and lying functions of the wheelchair bed; when the wheelchair bed is unfolded, the bed surface of the unfolded wheelchair bed can be inclined in a vertical plane by extending the second electric cylinder and the fifth electric cylinder, so that a user can get up under the condition of lying; the included angle between the seat frame component and the backrest component is adjusted through the extension and retraction of the fourth electric cylinder, so that the integral gravity center of the wheelchair bed can be adjusted in the process that a user climbs up and down, the running stability and safety of the wheelchair bed are ensured, the wheelchair bed integrates multiple functions, and the user experience feeling and the market competitiveness of a product are improved;

because the back subassembly, the seat frame subassembly, the leg board subassembly, the pull rod, connecting rod and back bracing piece according to preface hinged joint and form the closed loop, and the back subassembly still with spacing, the handrail connecting rod, crank and seat frame subassembly are connected according to the preface and form the closed loop, so, only need control the flexible of first electric jar, can realize folding or expansion and the accomodating of handrail of wheelchair bed simultaneously, avoid the handrail to hang the user clothing, when improving wheelchair bed safety in utilization, the form accommodation process of wheelchair bed has been simplified greatly, the folding or the expansion efficiency of wheelchair bed has been promoted.

Drawings

Fig. 1 is a schematic structural view of a multifunctional electric wheelchair bed according to an embodiment of the present invention;

fig. 2 is a rear view of the multifunctional electric wheelchair bed according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the multifunctional electric wheelchair bed in a folded state according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the multifunctional electric wheelchair bed in an incompletely unfolded state according to an embodiment of the present invention;

fig. 5 is a schematic structural view of the multifunctional electric wheelchair bed in an expanded state according to an embodiment of the present invention;

fig. 6 is a diagram illustrating a positional relationship between the lifting diagonal bracing assembly and the mounting frame according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the multifunctional electric wheelchair bed in an embodiment of the present invention in an optimum state on the flat ground;

fig. 8 is a schematic structural view of the multifunctional electric wheelchair bed in a downhill state according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the multifunctional electric wheelchair bed in an upward slope state according to an embodiment of the present invention;

fig. 10 is a schematic structural view of the multifunctional electric wheelchair bed in an ascending state according to an embodiment of the present invention;

fig. 11 is a schematic structural view of the multifunctional electric wheelchair bed in a standing up state according to an embodiment of the present invention;

fig. 12 is a position relationship diagram of the position limiting frame and the armrest in a first state according to an embodiment of the present invention;

fig. 13 is a position relationship diagram of the position limiting frame and the armrest in another state according to an embodiment of the present invention;

FIG. 14 is an enlarged partial view of the portion A in the embodiment of FIG. 1;

fig. 15 is a schematic structural view of a driving wheel according to an embodiment of the present invention;

FIG. 16 is a schematic cross-sectional view taken along the direction B-B in the embodiment shown in FIG. 15.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 to 11 together, the present invention provides a multifunctionalelectric wheelchair bed 10, which includes abackrest assembly 100, aseat frame assembly 200, aleg plate assembly 300 and apedal assembly 400 hinged in sequence and formed with a sitting surface,armrest mechanisms 500 symmetrically arranged on two sides of theseat frame assembly 200, aninstallation frame 600 arranged on the bottom of theseat frame assembly 200, adriving wheel 610 and a drivenwheel 620 arranged on theinstallation frame 600, a firstelectric cylinder 210 hinged with thebackrest assembly 100 arranged on the bottom of theseat frame assembly 200, abackrest support rod 110 hinged with one side of thebackrest assembly 100 facing the sitting surface, and aconnecting rod 120 hinged with the end of thebackrest support rod 110; theleg plate assembly 300 is hinged with apull rod 310 connected with theconnecting rod 120 in a hinged manner and is provided with a secondelectric cylinder 320, and thepedal plate assembly 400 is hinged with apush rod 410 connected with the secondelectric cylinder 320 in a hinged manner; thearmrest mechanism 500 includes alimiting frame 510, anarmrest connecting rod 520 and acrank 530, which are sequentially hinged, thelimiting frame 510 is hinged to thebackrest module 100, anarmrest 540 is installed in the limiting frame and can rotate in a vertical plane and a plane perpendicular to the vertical plane, and an end of thecrank 530 far away from thearmrest connecting rod 520 is hinged to theseat frame module 200. The firstelectric cylinder 210 extends and retracts and drives thebackrest module 100 to rotate, and then sequentially drives thebackrest support bar 110, theconnecting rod 120, thepull rod 310, theleg plate module 300 and theseat frame module 200 to rotate relative to thebackrest module 100, so as to fold or unfold thewheelchair bed 10; thelimiting frame 510, thearmrest link 520, and thecrank 530 are retracted or extended by the cooperation of thebackrest module 100 and theseat frame module 200 when the firstelectric cylinder 210 extends or contracts.

The multifunctionalelectric wheelchair bed 10 further comprises a liftingdiagonal bracing assembly 700 which is composed of a thirdelectric cylinder 710, a scissortype lifting member 730 with a top provided with abearing frame 720, a central adjustingshaft 740 rotatably mounted on thebearing frame 720, acenter adjusting frame 750, a fourthelectric cylinder 760 and a fifthelectric cylinder 770, wherein the thirdelectric cylinder 710 is accommodated at the bottom of themounting frame 600 and is hinged with the scissortype lifting member 730 for folding or unfolding the scissortype lifting member 730 to adjust the horizontal height of thewheelchair bed 10, thecenter adjusting frame 750 is respectively and rotatably connected with the central adjustingshaft 740 and theseat frame assembly 200 and is provided with adriving rod 751 hinged with acrank 530, the fourthelectric cylinder 760 is adjacent to the joint of theseat frame assembly 200 and thebackrest assembly 100 and is hinged with thecenter adjusting frame 750, the output end of the fourthelectric cylinder 760 is hinged with themounting frame 600 for driving thecenter adjusting frame 750 and theseat frame assembly 200 to deflect in a vertical plane, the fifthelectric cylinder 770 is arranged on thecenter adjusting frame 750 and is hinged with theseat frame assembly 200, for driving thewheelchair bed 10 to rotate when thewheelchair bed 10 is unfolded; and ananti-tip wheel 800 for supporting the remaining components together with thedriving wheel 610 and the drivenwheel 620.

By implementing the multifunctionalelectric wheelchair bed 10 of the utility model, thewheelchair bed 10 can be folded or unfolded by the extension and contraction of the firstelectric cylinder 210, so as to realize the sitting and lying functions of thewheelchair bed 10; when thewheelchair bed 10 is unfolded, the bed surface of theunfolded wheelchair bed 10 can be inclined in a vertical plane by extending the secondelectric cylinder 320 and the fifthelectric cylinder 770, so that the user can get up while lying; the included angle between theseat frame assembly 200 and thebackrest assembly 100 is adjusted through the extension and retraction of the fourthelectric cylinder 760, so that the overall gravity center of thewheelchair bed 10 can be adjusted in the process that a user climbs up and down, the running stability and safety of thewheelchair bed 10 are ensured, thewheelchair bed 10 integrates multiple functions, and the user experience and the market competitiveness of a product are improved; because thebackrest assembly 100, theseat frame assembly 200, theleg plate assembly 300, thepull rod 310, the connectingrod 120 and thebackrest supporting rod 110 are sequentially hinged and form a closed loop, and thebackrest assembly 100 is further sequentially connected with thelimiting frame 510, thearmrest connecting rod 520, thecrank 530 and theseat frame assembly 200 and form a closed loop, so that folding or unfolding of thewheelchair bed 10 and storage of thearmrests 540 can be simultaneously realized only by controlling extension and retraction of the firstelectric cylinder 210, clothes of a user are prevented from being hung by thearmrests 540, the use safety of thewheelchair bed 10 is improved, meanwhile, the form adjustment process of thewheelchair bed 10 is greatly simplified, and the folding or unfolding efficiency of thewheelchair bed 10 is improved.

The firstelectric cylinder 210 is extended and contracted to fold or unfold thewheelchair bed 10, and to house or unfold thearmrest mechanism 500. It should be noted that, the extension or contraction of the electric cylinder disclosed in the present invention refers to the extension or contraction of the piston rod at the output end of the electric cylinder under the action of the power supply, and this does not include other possible explanations here, and the following movements of other electric cylinders should refer to this explanation, and are not described herein again. Specifically, when the firstelectric cylinder 210 extends, thebackrest assembly 100 is pushed to deflect toward theseat frame assembly 200, and meanwhile, thebackrest support rod 110 on thebackrest assembly 100 drives theconnecting rod 120 and thepull rod 310 to rotate, so as to drive theleg plate assembly 300 to deflect toward theseat frame assembly 200, so that thewheelchair bed 10 is folded and provides a seat for a user, in the process, a quadrangle formed by thebackrest assembly 100, thelimiting frame 510, thearmrest connecting rod 520 and thecrank 530 deforms under the traction of thebackrest assembly 100, and thearmrest connecting rod 520 deflects toward theseat frame assembly 200, so as to raise the horizontal height of thearmrest 540, so that thearmrest 540 is lifted from the side of theseat frame assembly 200, and thearmrest 540 is unfolded. When the firstelectric cylinder 210 is contracted, thebackrest assembly 100 is pulled to deflect in a direction away from theseat frame assembly 200, and meanwhile, thebackrest support rod 110 of thebackrest assembly 100 drives theconnecting rod 120 and thepull rod 310 to rotate, so as to drive theleg plate assembly 300 to deflect in a direction away from theseat frame assembly 200 until thebackrest assembly 100, theseat frame assembly 200 and theleg plate assembly 300 are in the same plane, so that thewheelchair bed 10 is unfolded. Accordingly, thearmrest link 520 will deflect away from theseat frame assembly 200 and pull thearmrest 540 downward, allowing thearmrest 540 to be received on the side of theseat frame assembly 200. In this way, the folding or unfolding of thewheelchair bed 10 and the storage of thearmrests 540 can be simultaneously achieved only by controlling the firstelectric cylinder 210, thereby simplifying the form conversion process of thewheelchair bed 10 and improving the adjustment efficiency of thewheelchair bed 10.

The secondelectric cylinder 320 is used for independently controlling the folding and unfolding of thepedal assembly 400, so as to facilitate the user to step on or increase the lying area of thewheelchair bed 10, facilitate the user to bend and extend the legs in the lying state, and improve the comfort of thewheelchair bed 10. Specifically, when the secondelectric cylinder 320 is energized and extended, the output end of the secondelectric cylinder 320 acts on a deflection thrust of thepush rod 410, so that thefootrest assembly 400 deflects toward the sitting and lying surface side of theleg plate assembly 300, and the folding of thefootrest assembly 400 is realized; when the secondelectric cylinder 320 is contracted, the output end of the secondelectric cylinder 320 exerts a deflecting pulling force on thepush rod 410, so that thefootrest assembly 400 is deflected to the opposite side of the lying surface, thereby realizing the unfolding of thefootrest assembly 400.

Referring to fig. 12 and 13, in an embodiment, the limitingframe 510 includes afirst wing 511 and asecond wing 512 arranged at an included angle, thefirst wing 511 is rotatably provided with alimiting block 513, and thearmrest 540 is hinged to the limitingblock 513 and swings in alimiting space 514 sandwiched by thefirst wing 511 and thesecond wing 512. It can be understood that thearmrest 540 is driven by thelimiting block 513 to swing in the plane where thefirst wing plate 511 is located, and at the same time, thearmrest 540 is also constrained by thelimiting block 513 to swing in thelimiting space 514 sandwiched by thefirst wing plate 511 and thesecond wing plate 512, and the swing range is determined by the included angle between thefirst wing plate 511 and thesecond wing plate 512, so that a user can adjust the angle of thearmrest 540 in the vertical plane according to the need of the user, and before thearmrest 540 is stored, thearmrest 540 can be pushed in the direction away from theseat frame assembly 200, so as to prevent thearmrest 540 from catching the clothes of the user in the process of storing thearmrest 540 to the lower side of theseat frame assembly 200, and avoid accidents. It should be noted that, in actual production, anti-skid threads may be disposed at the connection position of thelimiting block 513 and thearmrest 540 or interference connection may be adopted to increase the damping between thelimiting block 513 and thearmrest 540, so as to avoid the problem that thearmrest 540 swings downward under the action of its own gravity after being lifted, thereby improving the reliability of the angle adjustment operation of thearmrest 540.

Referring to fig. 13 and 14, in an embodiment, thearmrest mechanism 500 further includes a connectingmember 550, aslot 515 is disposed on a side of thelimiting frame 510 adjacent to thebackrest module 100, theslot 515 is engaged with the connectingmember 550, and the connectingmember 550 is clamped in theslot 515 and is respectively hinged to thebackrest module 100 and thearmrest connecting rod 520. It can be understood that thelimit frame 510 is hinged to thebackrest module 100 and thearmrest connecting rod 520 through the connectingmember 550, and thus, when thelimit frame 510 or thearmrest 540 is damaged, thelimit frame 510 can be replaced by taking it off from the connectingmember 550, so that the maintenance operation of thewheelchair bed 10 is simplified, and the maintenance efficiency of thewheelchair bed 10 is improved.

The thirdelectric cylinder 710 is used for controlling the unfolding or the storage of thescissors lifting member 730 to adjust the horizontal height of the top of thescissors lifting member 730, so that thecenter adjusting frame 750 rotatably connected with thecenter adjusting shaft 740 at the top of thescissors lifting member 730 drives theseat frame assembly 200 to ascend or descend, and the horizontal height of the sitting surface of thewheelchair bed 10 is adjusted, and thus, when a user sits or lies on thewheelchair bed 10, the user can adjust the height of thewheelchair bed 10 only by controlling the thirdelectric cylinder 710, so that the user can take articles at high or low positions or stand up conveniently, and the convenience in use of thewheelchair bed 10 is improved.

In one embodiment, thescissor lift 730 includes alifting rod 731 and a plurality of support rods symmetrically disposed on both sides of thelifting rod 731, the support rods include a support member formed by twosupport rods 732 disposed in a crossed manner and hinged to each other or a plurality of support members connected by hinges, and the middle portion of thelifting rod 731 is hinged to the output end of the thirdelectric cylinder 710. Specifically, referring to fig. 10, when the thirdelectric cylinder 710 extends, the output end of the thirdelectric cylinder 710 supports thelifting rod 731 upwards and pushes thelifting rod 731 away from the cylinder body of the thirdelectric cylinder 710, in this case, thelifting rod 731 synchronously pulls the supportingrod 732 to move, so that the supportingrod 732 deforms, and the horizontal height of the top of the supportingrod 732 rises, thereby lifting the horizontal height of thesupport frame 720 connected to the supportingrod 732 and the horizontal height of theseat frame assembly 200 connected to the supportingrod 732 through thesupport frame 720 and the aligningframe 750, so as to lift the sitting and lying height of the user. Similarly, when the thirdelectric cylinder 710 contracts, the output end of the thirdelectric cylinder 710 pulls the liftingrod 731, and at this time, the liftingrod 731 receives a vertical downward pulling force and a horizontal pulling force, and pulls the supportingrod 732 to deform, so that the horizontal height of the top of the supportingrod 732 is reduced, and then the horizontal height of theseat frame assembly 200 is reduced, so as to meet the needs of the user.

The fourthelectric cylinder 760 is used to drive thecenter adjustment frame 750 to deflect in a vertical plane, so as to adjust the included angle between theseat frame assembly 200 and thebackrest assembly 100, so that the center of gravity of thewheelchair bed 10 as a whole can be adjusted when a user rides thewheelchair bed 10 up and down a slope. Referring to fig. 7 to 9, when the user uses thewheelchair bed 10 on a flat ground, that is, when thewheelchair bed 10 is in a folded state, the user controls the fourthelectric cylinder 760 to contract, such that the cylinder body of the fourthelectric cylinder 760 approaches the bottom of the mountingframe 600 under the reaction force of the mountingframe 600, and at the same time, the hinged portion of the centeringframe 750 to the fourthelectric cylinder 760 deflects toward the bottom of the mountingframe 600, during which the connection portion of theseat frame assembly 200 to theleg plate assembly 300 is lifted up, thereby reducing the included angle between theseat frame assembly 200 and thebackrest assembly 100, so that when the user sits on thewheelchair bed 10, the back of the user can completely rest on thebackrest assembly 100, thereby avoiding the muscle soreness problem caused by the user sitting in danger for a long time, and improving the comfort level of thewheelchair bed 10.

Similarly, when the user rides thewheelchair bed 10 to drive down a slope, the contraction amount of the fourthelectric cylinder 760 can be further increased on the basis of driving on a flat ground, in other words, the included angle between theseat frame assembly 200 and thebackrest assembly 100 is further reduced, so that when the user leans on thebackrest assembly 100, the center of gravity of the user moves backwards, that is, the center of gravity of the whole body formed by thewheelchair bed 10 and the user moves backwards, thereby preventing thewheelchair bed 10 from turning forwards in the process of descending a slope and further injuring the user, and improving the safety of the use of thewheelchair bed 10.

Further, when the user rides on thewheelchair bed 10 to drive up a slope, i.e., to ascend a slope, the user may control the fourthelectric cylinder 760 to extend, so that the cylinder body of the fourthelectric cylinder 760 is away from the bottom of thelower mounting frame 600 by the reaction force of the mountingframe 600 and pushes the hinge portion of theadjustment frame 750 with the fourthelectric cylinder 760 to deflect in a direction away from the bottom of the mountingframe 600, in the process, the horizontal height of the connection portion of theseat frame assembly 200 with theleg plate assembly 300 is lowered, thereby increasing the included angle between theseat frame assembly 200 and thebackrest assembly 100, so that when the user sits on thewheelchair bed 10, the center of gravity of the user tilts forward to balance the problem of backward movement of the center of gravity of thewheelchair bed 10, and thus, the problem of injury to the user caused by backward tilting of thewheelchair bed 10 during ascending a slope may be avoided, thereby improving the safety of the use of thewheelchair bed 10.

The fifthelectric cylinder 770 is used to rotate thewheelchair bed 10 in a condition where thewheelchair bed 10 is unfolded and thefootrest assembly 400 is raised, so as to be used for standing up in a lying condition. Specifically, when the user needs to stand up, the user can control the extension of the fifthelectric cylinder 770, so, the fifthelectric cylinder 770 will lift theseat frame assembly 200, make theseat frame assembly 200 deflect to the vertical direction together with thebackrest assembly 100, theleg plate assembly 300 and thepedal plate assembly 400, thereby make thebackrest assembly 100 one end lift, thepedal plate assembly 400 one end descends, so that the user stands up upright, so, when older user sits for a long time on the wheelchair, the upright stand up can be realized by adjusting the fifthelectric cylinder 770, avoid resulting in the vascular compression of the leg because of sitting for a long time, reduce the difficulty of standing up. In this case, thewheelchair bed 10 is in an inclined state, and theanti-rolling wheel 800 is disposed on thedriving wheel 610 at a side away from the drivenwheel 620, so as to lower the center of gravity of thewhole wheelchair bed 10, and prevent a user from rolling over due to unstable center of gravity during standing up, thereby improving the safety of thewheelchair bed 10.

Referring to fig. 10, in an embodiment, anoperation panel 541 having a plurality of buttons is disposed on an outer side of thearmrest 540 for controlling the operation of each electric cylinder and the drivingmotor 611. In this way, the user can control and adjust the corresponding electric cylinder by only adjusting the button on theoperation panel 541, so as to reduce the operation difficulty of thewheelchair bed 10. Of course, in actual production, a touch screen can be used to replace the control panel, so as to realize intelligent control of thewheelchair bed 10.

Referring to fig. 15 and 16, in an embodiment, thedriving wheel 610 includes apower input shaft 612 driven by a drivingmotor 611, apower output shaft 613 matched with thepower input shaft 612, and awheel 614 rotating coaxially with thepower output shaft 613, a steppedhole 615 is formed at an end of thepower input shaft 612 away from thepower output shaft 613, a thrust bearing positioning threadedring 616 in threaded connection with an inner surface of thepower input shaft 612 is disposed in the steppedhole 615, apressing shaft screw 617 threaded with the thrust bearing positioning threadedring 616 is disposed through the thrust bearing positioning threadedring 616, athrust bearing 618 abutting against an inner surface of the steppedhole 615 is mounted at an end of thepressing shaft screw 617 located at the steppedhole 615, thethrust bearing 618 is mounted on apressure shaft screw 617 via alock nut 619, and thepressure shaft screw 617 is used to push thepower input shaft 612 to connect with thepower output shaft 613 or pull thepower input shaft 612 away from thepower output shaft 613 via the thrust bearing positioning threadedring 616 under an external force. Specifically, during the use of thewheelchair bed 10, thepressing shaft screw 617 can be screwed, so that thepressing shaft screw 617 presses thethrust bearing 618 through the thrust bearing positioning threadedring 616, so that thepower input shaft 612 moves toward thepower output shaft 613, and the kinetic energy of the drivingmotor 611 is transmitted to thepower output shaft 613, thereby driving thewheels 614 to roll, and realizing the electric driving of thewheelchair bed 10. When the power storage device of thewheelchair bed 10, such as the battery, is insufficient or has other faults, thepressing shaft screw 617 can be loosened, so that the lockingnut 619 moves towards the edge of the steppedhole 615 under the driving of thepressing shaft screw 617 and presses thethrust bearing 618 and the thrust bearing positioning threadedring 616, so that thepower output shaft 613 moves away from thepower output shaft 613 until the two are disconnected, and thus thepower output shaft 613 and thewheel 614 are not controlled by the drivingmotor 611, so as to realize the manual control mode of thewheelchair bed 10.

In one embodiment, a reinforcingmember 630 is mounted on the outer surface of thepower output shaft 613, and a dampingspring 631 is disposed on the reinforcingmember 630 and connected to the bottom of the mountingbracket 600. By providing thereinforcement 630, the contact area between thedriving wheel 610 and the mountingframe 600 is increased, that is, the connection strength between thedriving wheel 610 and the mountingframe 600 is improved, and thedriving wheel 610 is prevented from falling off from the mountingframe 600, so as to ensure the reliability of the use of thewheelchair bed 10. In addition, during the movement of thewheelchair bed 10, when thedriving wheel 610 travels on the uneven ground, the vibration of thedriving wheel 610 caused by the ground may be partially absorbed by the dampingspring 631, thereby reducing the mechanical energy transmitted to the mountingbracket 600, that is, reducing the vibration amplitude of thewheelchair bed 10, so as to improve the comfort of the user in sitting and lying.

In one embodiment, thebackrest module 100 is provided with apush handle 130 on the side facing away from the sitting surface. By providing the push handle 130 on thebackrest module 100, other people can grasp the push handle 130 during thewheelchair bed 10 entering the manual control mode or going up and down a slope, which facilitates to push thewheelchair bed 10 to move.

In one embodiment, thebackrest module 100, theseat frame module 200, theleg plate module 300 and thefootrest module 400 respectively include a frame and a support plate, each support plate is correspondingly installed on the corresponding frame and has a plurality of ventilation holes. Through set up the ventilation hole in the backup pad, can avoid because of user's health contacts with the backup pad for a long time, the sweat that the user produced is difficult to in time evaporate, causes the emergence of the uncomfortable problem of user's health. In addition, the ventilation holes can also be used as lightening holes, so that the strength of the supporting plate is ensured, the overall weight of thewheelchair bed 10 is reduced, and the transferring difficulty of thewheelchair bed 10 is reduced. In another embodiment, a soft cushion is respectively arranged on each supporting plate. Through setting up the cushion, increased the area of contact between user and the backup pad, be favorable to promoting the comfort level that the user sat to lie.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A multifunctional electric wheelchair bed (10) comprises a backrest assembly (100), a seat frame assembly (200), a leg plate assembly (300) and a pedal plate assembly (400) which are sequentially hinged and formed with a sitting surface, wherein armrest mechanisms (500) are symmetrically arranged on two sides of the seat frame assembly (200), a mounting frame (600) is arranged at the bottom of the seat frame assembly (200), a driving wheel (610) and a driven wheel (620) are arranged on the mounting frame (600), and the multifunctional electric wheelchair bed is characterized in that,

a first electric cylinder (210) hinged with the backrest component (100) is installed at the bottom of the seat frame component (200), a backrest support rod (110) is hinged on one surface, back to the sitting surface, of the backrest component (100), and a connecting rod (120) is hinged at the tail end of the backrest support rod (110); a pull rod (310) hinged with the connecting rod (120) is hinged on the leg plate assembly (300), a second electric cylinder (320) is installed on the leg plate assembly, and a push rod (410) hinged with the second electric cylinder (320) is hinged on the pedal assembly (400);

the armrest mechanism (500) comprises a limiting frame (510), an armrest connecting rod (520) and a crank (530) which are sequentially hinged, the limiting frame (510) is hinged with the backrest component (100), an armrest (540) which can rotate on a vertical plane and a vertical plane is arranged in the limiting frame, and one end, far away from the armrest connecting rod (520), of the crank (530) is hinged with the seat frame component (200);

the first electric cylinder (210) stretches and retracts and drives the backrest component (100) to rotate, and then the backrest support rod (110), the connecting rod (120), the pull rod (310), the leg plate component (300) and the seat frame component (200) are sequentially driven to rotate relative to the backrest component (100) so as to fold or unfold the wheelchair bed (10); the limit frame (510), the armrest connecting rod (520) and the crank (530) are accommodated or unfolded under the combined action of the backrest assembly (100) and the seat frame assembly (200) when the first electric cylinder (210) extends and contracts;

the wheelchair comprises a backrest assembly and a wheelchair seat, and further comprises a lifting inclined strut assembly (700) consisting of a third electric cylinder (710), a scissor type lifting piece (730) with a bearing frame (720) arranged at the top, and a central adjusting shaft (740) rotatably mounted on the bearing frame (720), a centering frame (750), a fourth electric cylinder (760) and a fifth electric cylinder (770), wherein the third electric cylinder (710) is accommodated at the bottom of the mounting frame (600) and is hinged with the scissor type lifting piece (730) and used for folding or unfolding the scissor type lifting piece (730) to adjust the horizontal height of the wheelchair bed (10), the centering frame (750) is respectively and rotatably connected with the central adjusting shaft (740) and the seat frame assembly (200) and is provided with a transmission rod (751) hinged with the crank (530), and the fourth electric cylinder (760) is adjacent to the joint of the seat frame assembly (200) and the backrest assembly (100) and is hinged with the centering frame (750), the output end of the fourth electric cylinder (760) is hinged with the mounting frame (600) and used for driving the centering frame (750) and the seat frame assembly (200) to deflect in a vertical plane, and the fifth electric cylinder (770) is arranged on the centering frame (750) and hinged with the seat frame assembly (200) and used for driving the wheelchair bed (10) to rotate when the wheelchair bed (10) is unfolded;

and an anti-tip wheel (800) for supporting the remaining components together with the driving wheel (610) and the driven wheel (620).

2. The multifunctional electric wheelchair bed (10) of claim 1, wherein the limiting frame (510) comprises a first wing plate (511) and a second wing plate (512) arranged at an included angle, a limiting block (513) is rotatably arranged on the first wing plate (511), and the armrest (540) is hinged to the limiting block (513) and swings in a limiting space (514) formed by the first wing plate (511) and the second wing plate (512).

3. The multifunctional electric wheelchair bed (10) of claim 1, wherein the armrest mechanism (500) further comprises a connecting member (550), a clamping groove (515) matched with the connecting member (550) is formed in one surface of the limiting frame (510) adjacent to the backrest assembly (100), and the connecting member (550) is clamped in the clamping groove (515) and is respectively hinged to the backrest assembly (100) and the armrest connecting rod (520).

4. The multifunctional electric wheelchair bed (10) of claim 1, wherein the driving wheel (610) comprises a power input shaft (612) driven by a driving motor (611), a power output shaft (613) matched with the power input shaft (612), and a wheel (614) rotating coaxially with the power output shaft (613), a stepped hole (615) is formed in one end of the power input shaft (612) far away from the power output shaft (613), a thrust bearing positioning threaded ring (616) in threaded connection with the inner surface of the power input shaft (612) is arranged in the stepped hole (615), a pressure shaft screw (617) in threaded connection with the thrust bearing positioning threaded ring (616) penetrates through the thrust bearing positioning threaded ring (616), and a thrust bearing (618) abutting against the inner surface of the stepped hole (615) is arranged at one end of the pressure shaft screw (617) positioned in the stepped hole (615), the thrust bearing (618) is arranged on the pressure shaft screw rod (617) through a locking nut (619), and the pressure shaft screw rod (617) is used for pushing the power input shaft (612) to be connected with the power output shaft (613) or pulling the power input shaft (612) away from the power output shaft (613) through the thrust bearing positioning threaded ring (616) under the action of external force.

5. The multifunctional electric wheelchair bed (10) of claim 4, characterized in that a reinforcement (630) is installed on the outer surface of the power output shaft (613), and a damping spring (631) is disposed on the reinforcement (630) and connected to the bottom of the mounting bracket (600).

6. The multifunctional electric wheelchair bed (10) of claim 4, wherein the outer side of the armrest (540) is provided with an operation panel (541) having a plurality of buttons for controlling the operation of each electric cylinder and the driving motor (611).

7. The multifunctional electric wheelchair bed (10) of claim 1, wherein the scissor lift (730) comprises a lifting rod (731) and a plurality of support rods symmetrically arranged on both sides of the lifting rod (731), the support rods comprise a support member formed by two support rods (732) arranged in a crossed manner and connected by hinges or a plurality of support members connected by hinges, and the middle part of the lifting rod (731) is hinged to the output end of the third electric cylinder (710).

8. The multifunctional electric wheelchair bed (10) of any one of claims 1 to 7, wherein the backrest assembly (100), the seat frame assembly (200), the leg plate assembly (300) and the footrest assembly (400) respectively comprise a framework and a support plate, each support plate is correspondingly mounted to the corresponding framework and is respectively provided with a plurality of ventilation holes.

9. The multifunctional electric wheelchair bed (10) of claim 8 wherein each of the support plates is provided with a cushion.

10. The multifunctional electric wheelchair bed (10) of claim 9, characterized in that a pushing handle (130) is provided on the side of the backrest module (100) facing away from the sitting surface.

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