Multifunctional foldable child tricycle and working method thereofTechnical Field
The invention relates to a multifunctional foldable child tricycle and a working method thereof.
Background
The children tricycle in the prior art comprises a frame, front wheels, rear wheels, handle bars and a saddle, wherein the rear wheels and the handle bars are respectively arranged on two sides of the frame, the saddle is arranged on the frame, the frame comprises a front fork, a front vertical pipe and a rear wheel bracket, the front vertical pipe and the rear wheel bracket are rotatably arranged with the front fork, the front wheels are arranged on the lower parts of the front fork, and the two rear wheels are respectively arranged on the lower parts of two sides between the rear wheels. Usually, the front end part of the rear wheel bracket and the front vertical pipe are fixedly connected into a whole, so that the child tricycle cannot be folded, the volume is large, the transportation cost is high, the operation steps of the design with a small part of foldable parts are complicated, and a single person cannot finish the operation.
The tricycle for children is taken as a riding-instead-of-walking device and is popular with people. In order to facilitate the indoor storage and the outdoor carrying of the children tricycle, a part of children tricycles in the prior art can be folded. Meanwhile, some child tricycles are required to reduce occupied space or realize multi-angle use by adjusting the opening and closing angle of the rear wheel, but the current opening and closing angle adjusting mode is unreasonable, and the operation is complex, the adjustment work cannot be independently completed, and the synchronous swing cannot be realized.
The traditional linkage mode of steering handle and handlebar is complicated, and the cost is higher, dismouting difficulty when the maintenance is needed to the break down, and cost of maintenance is higher, exists the structure of linking through wire rope, but its structural design is unreasonable, and job stabilization nature is relatively poor, appears the phenomenon of luffing motion easily when turning to, appears wearing and tearing each other or the dead phenomenon of card when serious.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide the multifunctional foldable child tricycle and the working method thereof, which not only have reasonable structure, but also are convenient and quick to operate.
In order to solve the technical problems, the technical scheme of the invention is as follows: the multifunctional foldable child tricycle comprises a front frame and a rear frame which are connected through a main beam, wherein a handlebar which is connected with the front frame in a rotating way vertically penetrates through the front frame, the lower end of the handlebar is connected with a steering wheel, a steering handle which is connected with the rear frame in a rotating way penetrates through the rear frame, and the steering handle is connected with the handlebar through a synchronous steel wire rope linkage assembly; the two sides of the rear frame are respectively provided with a rear wheel, and the rear wheels are connected with the rear frame through an opening and closing angle adjusting assembly; the rear end of the main beam is connected with the rear frame in a hanging way through a folding assembly; and a seat is arranged on the main beam.
Further, the synchronous steel wire rope linkage assembly comprises a rear positioning block fixedly connected to the lower end of the steering handle, two rear positioning grooves for positioning the rear end parts of the left steel wire rope and the right steel wire rope are formed in the rear positioning block, a guide block is arranged on the front side of the rear positioning block, two through grooves for passing through the two steel wire ropes are formed in the guide block in a penetrating mode in the front-back mode, the upper ends of the guide block are clamped and embedded at the bottom of the rear frame through clamping blocks, the front ends of the two steel wire ropes penetrate through a main car beam and are connected with the front frame, a front positioning block is sleeved and fixed on the periphery of the handle, and two front positioning grooves for positioning the front end parts of the left steel wire rope and the right steel wire rope are formed in the front positioning block; the steering handle is characterized in that a sleeve for inserting and rotating the steering handle is fixedly arranged on the rear frame of the vehicle, the lower end of the steering handle penetrates out of the sleeve and is fixedly connected with a rear positioning block coaxially, a first major arc groove for winding two steel wires is formed in the rear positioning block along the periphery of the rear positioning block inwards, and two ends of the first major arc groove are respectively communicated with two rear positioning grooves; the front positioning block is internally provided with a second major arc groove for winding two steel wire ropes along the periphery of the front positioning block, and two ends of the second major arc groove are respectively communicated with the two front positioning grooves; the top end of the guide block is symmetrically provided with protruding blocks protruding upwards on the left side and the right side of the through groove, and small holes are formed in the protruding blocks in a left-right penetrating mode and are inserted and locked through the distribution shaft.
Further, the main beam is in a hollow metal tube shape, and the lower end of the main beam is provided with a round opening for a steel wire rope to penetrate; the steel wire rope is sleeved with a protective sleeve after penetrating into the through groove, metal blocks with the outer diameter larger than that of the protective sleeve are coaxially and fixedly arranged at the two end parts of the protective sleeve, and the steel wire rope penetrates through the metal blocks; the utility model discloses a protection sleeve, including logical inslot, protective sheath spacing groove, metal piece mounting groove, protective sheath spacing groove and logical groove top all wear out the guide block, the protective sheath spacing groove has been seted up to logical inslot, the coaxial metal piece mounting groove that supplies the metal piece to place of protective sheath spacing inslot.
Further, the front positioning block is fixedly connected with the handlebar, the upper end face and the lower end face of the front positioning block are fixedly connected with the handlebar through a plurality of vertical positioning blocks, a front guide piece is arranged at the rear of the front positioning block, a guide groove which is shaped like an eight is formed in a penetrating way on the front guide piece so as to be convenient for two steel wire ropes to wind on the positioning block, an outer shell is arranged on the handlebar outer cover and is fixedly connected with the main beam through the outer shell, and the front guide piece is clamped and embedded between the outer shell and the main beam; the upper end of the guide groove and the front end of the front positioning groove are both provided with anti-drop through a cover plate cover, and the outer ends of the cover plates are all propped and positioned through the outer shell; the handlebar includes top handle and below and drive steering's actuating lever, be equipped with the shell fragment in the inside cavity of actuating lever and nearly top department, shell fragment one end top is connected at the actuating lever inner wall, and the other end rigid coupling is on elastic button, the actuating lever is worn out to elastic button outer end, the handle is coaxial to be inserted and cladding outside the actuating lever, and has offered the opening that supplies elastic button outstanding and top to connect on the dismouting button on hand, the shell has been established and has been linked firmly to the handle bottom overcoat, the dismouting button is transversely established between handle and shell, and the shell is worn out to dismouting button outer end, and inner and the butt joint of opening part.
Further, the opening and closing angle adjusting assembly comprises a left swinging member and a right swinging member which are connected with each other in a rotating manner through a vertical rotating rod in the rear frame, a yielding port for installing a synchronizing plate is reserved between the left swinging member and the right swinging member, the synchronizing plate is overlapped with the center of the left swinging member and penetrates through the rotating rod, a strip-shaped hole is formed in the synchronizing plate in a penetrating manner, a left synchronizing bar is hinged to the lower end face of the left swinging member, a right synchronizing bar is hinged to the opposite face of the lower end face of the right swinging member and the opposite face of the lower end face of the left swinging member, and the left synchronizing bar is far away from the hinging side of the left swinging member and the right synchronizing bar and is far away from the hinging side of the right swinging member, is respectively positioned on the upper side and the lower side of the strip-shaped hole and sequentially penetrates through the hinging hole through a synchronizing round bar; the strip-shaped holes vertically penetrate through and are formed in the position, close to the rear end, of the synchronizing plate, the strip-shaped holes extend back and forth, and the left synchronizing bar and the right synchronizing bar extend to the strip-shaped holes obliquely and backward.
Further, the left swinging piece comprises a cylindrical left swinging block and a left supporting leg fixedly connected to the left side of the left swinging block, the right swinging piece comprises a cylindrical right upper swinging block and a right lower swinging block which are used for being clamped on the upper side and the lower side of the left swinging block, right supporting legs symmetrical to the left supporting leg are fixedly connected to the right side of the right upper swinging block and the right lower swinging block, and a yielding port is formed between the right lower swinging block and the left swinging block; the upper right swing block vertically penetrates through an elliptical through hole, a limit block is inserted in the through hole, a raised strip which is beneficial to synchronous swing of the limit block and the upper right swing block is projected on the inner wall of the through hole, a limit groove for inserting the lower end of the limit block is concavely arranged on the upper surface of the left swing block, the limit groove extends along the arc direction of the circumferential direction of the left swing block, at least two vertically extending transposition holes are formed in the upper surface of the limit block, springs are arranged in the transposition holes, and an adjusting button is arranged above the limit block and is in matched transposition top connection with the two springs; at least two left locating holes are vertically formed in the left swing block in a penetrating mode, at least two right locating holes matched with the left locating holes in a swinging mode are formed in the right upper swing block, and the right locating holes and the left locating holes are sequentially inserted into the left locating holes and the right locating holes to be located through bolts from top to bottom when at least one of the right locating holes and the left locating holes is coaxial.
Further, the outer cover is provided with an outer cover after the left swinging block, the right upper swinging piece and the right lower swinging piece are combined, the left side and the right side of the outer cover are respectively provided with a through hole for the left leg and the right leg to extend out, and the rotating rod extends downwards from the top of the outer cover to penetrate out of the outer cover; the anti-drop device is characterized in that a base plate is arranged between the anti-drop device and the limiting block, the base plate is fixedly connected to the outer cover, a round hole for the protrusion of the adjusting button is formed in the outer cover, an anti-drop groove with the diameter larger than that of the round hole is coaxially formed in one side, close to the base plate, of the round hole, the inner end of the adjusting button is matched with the anti-drop groove through a convex flange at the periphery of the inner end of the adjusting button, a top connection block protrudes backwards from the rear end face of the adjusting button, the top connection block penetrates through the base plate to be matched and connected with sliding blocks fixedly connected with the tops of the two springs, and a sliding hole for the top connection block to penetrate through and be propped in with the sliding blocks is formed in the base plate.
Further, the lower end face of the left swing block protrudes downwards to form a left limiting plate with the same thickness as the left synchronizing bar, and the left limiting plate horizontally extends towards the center and penetrates through the rotating rod; the upper surface of the right lower swinging block is upwards protruded with a right limiting plate with the same thickness as the right synchronous bar, and the right limiting plate horizontally extends towards the center and passes through the rotating rod; the left swing block is fixedly provided with an arc-shaped guard plate along the butt joint side edge of the left supporting leg, the upper end of the guard plate vertically extends to be level with the upper end of the right upper swing block, the lower end of the guard plate vertically extends to be level with the lower end of the right lower swing block, and the inner end of the guard plate is fixedly connected to the outer wall of the left swing block.
Further, the folding assembly comprises a sheet metal part which is fixedly connected to the rear frame of the vehicle and has a U-shaped section, two sides of the lower end of the sheet metal part are downwards protruded with convex parts and are hinged with the main beam through the convex parts, a folding button which vertically extends and penetrates out of the sheet metal part from the top end is arranged in the sheet metal part, the lower end of the folding button is propped against the inner bottom end of the sheet metal part through a reset spring, the front end surface of the folding button horizontally protrudes out of a hook and penetrates out of the sheet metal part to be in hanging connection with the main beam for positioning, the rear end of the main beam is fixedly connected with a vertical butt joint plate, two ends of the butt joint plate are backwards extended with wing plates, the lower ends of the two wing plates are corresponding to the two convex parts and are in penetrating and hinging with a distribution shaft, and a notch which is hung with the hook is formed in the butt joint plate; the sheet metal part is provided with a yielding port which is matched with the notch and used for the hook to move up and down; and the lower end of the folding button is provided with a limiting round groove upwards for propping up the reset spring.
The working method of the multifunctional foldable children tricycle comprises the following steps: (1) When the child tricycle needs to turn right, the steering handle is rotated to drive the rear positioning block to rotate, the right wire rope is pulled to be stretched and pulled in the rotation process, the left wire rope is forced to be pulled forwards, namely the front positioning block is synchronously driven to turn right, the handle bar is driven to rotate right, namely the steering wheel is driven to complete the right turning, the right turning work of the child tricycle is completed, and the left turning is reversely and identically carried out; (2) When the opening and closing angle between rear wheels of the automobile is required to be adjusted, firstly pulling out a bolt, then pressing an adjusting button downwards to enable a jacking and connecting device to press a sliding block into a transposition hole from a sliding hole, compressing a spring, then swinging one supporting leg inwards and outwards, namely swinging inwards and rotating a right supporting leg, driving a right synchronous bar to swing forwards in a bar hole, enabling a left synchronous bar to swing forwards in the bar hole synchronously through connection of a synchronous round bar, namely driving the left supporting leg to swing inwards synchronously, realizing synchronous swinging, enabling the sliding block to be propped against a sheet metal part through the spring and slide, pushing other transposition holes and the sliding hole through stretching of the spring after swinging is in place, propping against the adjusting button again, loosening the adjusting button, and completing swinging; (3) When the rear frame of the vehicle needs to be folded, the folding button is pressed, the reset spring is compressed, the hook descends, the whole rear frame of the vehicle can be simultaneously turned forward around the hinge point, the hook is enabled to be separated from the notch, the folding button can be loosened, and the reset spring is reset, so that the folding work of the rear frame of the vehicle and the main beam of the vehicle is completed.
Compared with the prior art, the invention has the following beneficial effects: through the linkage design of the steel wire rope, the linkage structure is simpler, the disassembly and assembly are more convenient, the cost is reduced, and the steel wire rope can not swing up and down during steering through the guiding limiting effect of the guide block and the front guide piece, so that the work of the steel wire rope is more stable; the adjusting button is pressed downwards by one hand, the supporting leg is swung by the other hand, only one supporting leg is swung by the cooperation design of the synchronous plate and the synchronous bar, so that the other supporting leg can be swung synchronously, namely, the operation can be finished by a single person, the operation is simple and convenient, the occupied space can be reduced by adjusting the opening and closing angle, and the storage is convenient; the folding button is pressed to enable the hook to descend, the whole rear frame of the vehicle can be turned forwards around the hinge point simultaneously, the hook is enabled to be separated from the notch, the folding work of the rear frame and the main frame of the vehicle is completed, the operation steps are simple, convenient and easy to fold, and the folding work can be completed by a single person.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of a construction of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of G-G of FIG. 2;
FIG. 4 is a schematic view of the construction of a step wire rope linkage assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the connection of a steel wire rope according to an embodiment of the present utility model;
FIG. 6 is a schematic view of the structure of the rear positioning block according to the embodiment of the present utility model;
FIG. 7 is a schematic view of the structure of a guide block according to an embodiment of the present utility model;
FIG. 8 is a schematic illustration of a connection structure of a front positioning block and a handlebar in an embodiment of the present utility model;
FIG. 9 is a schematic diagram of a steel wire rope according to an embodiment of the present utility model;
FIG. 10 is a schematic view of a structure of an opening/closing angle adjusting assembly according to an embodiment of the present invention;
FIG. 11 is a rear view of an opening and closing angle adjustment assembly according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view of D-D of FIG. 11;
FIG. 13 is a cross-sectional view of E-E of FIG. 11;
FIG. 14 is a schematic view showing the overall construction of a rear frame of the vehicle according to the embodiment of the utility model;
FIG. 15 is a top view of FIG. 5;
FIG. 16 is a cross-sectional view of F-F of FIG. 15;
FIG. 17 is a schematic view showing the construction of a right swing member in the embodiment of the present utility model;
FIG. 18 is a schematic view showing the construction of a left swing member according to an embodiment of the present utility model;
FIG. 19 is a bottom view of the left swing member in an embodiment of the present utility model;
FIG. 20 is a schematic view of a folding assembly in accordance with an embodiment of the present utility model;
FIG. 21 is a schematic view showing the internal structure of a folding assembly according to an embodiment of the present utility model;
FIG. 22 is a schematic view showing the construction of a rear frame of a vehicle according to an embodiment of the present utility model;
FIG. 23 is a schematic view of a main beam configuration in accordance with an embodiment of the present utility model;
FIG. 24 is a schematic view showing the construction of a folding button in accordance with an embodiment of the present utility model;
FIG. 25 is a schematic view of a handlebar configuration in accordance with an embodiment of the present utility model;
FIG. 26 is a schematic view of the internal structure of a handlebar according to an embodiment of the present utility model.
In the figure: 1-synchronous steel wire rope linkage components, 2-opening and closing angle adjusting components, 3-folding components, A1-steering wheels, A2-rotating rods, A3-left swinging components, A4-right swinging components, A5-synchronous plates, A6-abdication ports, A7-strip holes, A8-left synchronous bars, A9-right synchronous bars, A11-left swinging blocks, A12-left support legs, A13-right upper swinging blocks, A14-right lower swinging blocks, A15-right support legs, A16-through holes, A17-limiting blocks, A18-raised strips, A19-limiting grooves, A20-transposition holes, A21-springs, A22-adjusting buttons, A23-left positioning holes, A24-right positioning holes, A25-bolts, A26-outer covers, A28-backing plates, A29-round holes, A30-anti-falling grooves, A31-top blocks, A32-sliding blocks, A33-sliding holes, A34-left limiting plates, A35-right limiting plates and A36-protecting plates; the steering device comprises a B1-main beam, a B2-front frame, a B3-rear frame, a B4-steering handle, a B5-rear positioning block, a B6-left steel wire rope, a B7-right steel wire rope, a B8-rear positioning groove, a B9-guiding block, a B10-through groove, a B11-clamping block, a B12-handlebar, a B13-front positioning block, a B15-clamping piece, a B16-sleeve, a B17-first major arc groove, a B18-second major arc groove, a B19-lug, a B20-round hole, a B21-protective sleeve, a B22-metal block, a B23-protective sleeve limiting groove, a B24-metal block mounting groove, a B25-round opening, a B26-vertical limiting block, a B27-front guiding piece, a B28-guiding groove and a B30-cover plate; the bicycle comprises a B31-handle, a B32-driving rod, a B33-elastic piece, a B34-elastic button, a B35-dismounting button, a B36-opening, a B37-shell, a C3-sheet metal part, a C4-convex part, a C5-folding button, a C6-reset spring, a C7-hook, a C8-notch, a C10-butt plate, a C11-wing plate, a C12-pin shaft, a C13-yielding opening, a C14-limiting round groove, a C15-fixing plate, a C16-connecting plate, a C17-seat and a C18-rear wheel.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1-26, a multifunctional foldable child tricycle comprises a front frame B2 and a rear frame B3 which are connected through a main beam B1, wherein a handlebar which is connected with the front frame in a rotating way vertically penetrates through the front frame, the lower end of the handlebar is connected with a steering wheel A1, a steering handle which is connected with the rear frame in a rotating way penetrates through the rear frame, and the steering handle is connected with the handlebar through a synchronous steel wire rope linkage assembly 1; the two sides of the rear frame are respectively provided with a rear wheel, and the rear wheels are connected with the rear frame through an opening and closing angle adjusting assembly 2; the rear end of the main beam is connected with the rear frame in a hanging way through a folding assembly 3; and a seat is arranged on the main beam.
In the embodiment of the invention, the steering handle B4 is rotatably connected with the rear frame of the vehicle, the lower end of the steering handle penetrates through the rear frame of the vehicle and is fixedly connected with the rear positioning block B5, two front positioning grooves B8 for positioning the rear end parts of the left steel wire rope B6 and the right steel wire rope B7 are formed in the rear positioning block, two through grooves B10 for allowing the two steel wire ropes to penetrate through are formed in the front side and the rear side of the rear positioning block, the upper ends of the guide blocks are clamped at the bottom of the rear frame of the vehicle through clamping blocks B11, the front ends of the two steel wire ropes penetrate through the main vehicle beam and are connected with the front frame of the vehicle, a handlebar B12 is rotatably connected with the front positioning block B13 along the periphery of the handlebar, and two front positioning grooves for positioning the front end parts of the left steel wire rope and the right steel wire rope are formed in the front positioning block, namely, the front end parts and the rear end parts of the two steel wire ropes are connected with clamping pieces B15 for being clamped in the front positioning grooves and the rear positioning grooves, and the lower ends of the handlebar are in linkage with the steering wheel.
In the embodiment of the invention, a sleeve B16 for inserting and rotating a steering handle is fixedly arranged on the rear frame of the vehicle, the steering handle can be internally provided with a flange or bent at the position where the upper end of the steering handle penetrates out of the sleeve so as to vertically limit the steering handle, the lower end of the steering handle penetrates out of the sleeve and is fixedly connected with a rear positioning block coaxially, a first major arc groove B17 for winding two steel wires is inwards arranged on the rear positioning block along the periphery of the rear positioning block, and two ends of the first major arc groove are respectively communicated with two rear positioning grooves; the front positioning block is internally provided with a second major arc groove B18 for winding two steel wire ropes along the periphery of the front positioning block, and two ends of the second major arc groove are respectively communicated with the two front positioning grooves.
In the embodiment of the invention, the top end of the guide block is symmetrically provided with the convex blocks B19 protruding upwards on the left side and the right side of the through groove, the convex blocks are respectively provided with the round holes B20 in a left-right penetrating mode and are inserted and locked through the pin shafts, the steel wire ropes can be limited to slide back and forth only in the through groove through the pin shaft locking, the phenomenon that the steel wire ropes shake up and down is effectively avoided, and the use stability of the steel wire ropes is ensured.
In the embodiment of the invention, a protective sleeve B21 is sleeved outside the steel wire rope after penetrating into the through groove, metal blocks B22 with the outer diameter larger than that of the protective sleeve are coaxially and fixedly arranged at the two ends of the protective sleeve, and the steel wire rope penetrates through the metal blocks; the utility model discloses a wire rope, including logical inslot, protective sheath spacing groove B23, protection sheath spacing inslot has been seted up and has been supplied the spacing protective sheath spacing groove B24 of protective sheath, metal piece mounting groove, protective sheath spacing groove and logical groove top all wear out the guide block to the installation of wire rope makes the dismouting more high-efficient convenient.
In the embodiment of the invention, the main beam is hollow metal tubular, and the lower end of the main beam is provided with a round opening B25 for a steel wire rope to penetrate.
In the embodiment of the invention, the front positioning block is fixedly connected with the handlebar, the upper end face and the lower end face of the front positioning block are fixedly connected with the handlebar through a plurality of vertical positioning blocks B26, a front guide piece B27 is arranged behind the front positioning block, a guide groove B28 which is shaped like a Chinese character 'ba' and is used for winding two steel wires on the positioning block is formed in the front guide piece in a penetrating manner, an outer shell is arranged on the handlebar outer cover and is fixedly connected with the main beam through the outer shell, and the front guide piece is clamped and embedded between the outer shell and the main beam.
In the embodiment of the invention, the upper end of the guide groove and the front end of the front positioning groove are both covered by the cover plate B30 to prevent falling, and the outer ends of the cover plates are all propped and positioned by the outer shell.
In the embodiment of the invention, the handlebar comprises a top handle B31 and a driving rod B32 which is arranged below and drives steering, wherein a shell fragment B33 is arranged in the hollow part inside the driving rod and near the top end, one end of the shell fragment is propped against the inner wall of the driving rod, the other end of the shell fragment is fixedly connected to an elastic button B34, the outer end of the elastic button penetrates out of the driving rod, the handle is coaxially inserted and coated outside the driving rod, an opening B36 which is used for the elastic button to protrude and prop against a disassembly button B35 is formed in the handle, a shell sleeve B37 is sleeved and fixedly connected at the bottom end of the handle, the disassembly button is transversely arranged between the handle and the shell sleeve, the outer end of the disassembly button penetrates out of the shell sleeve, the inner end of the disassembly button is butted with the opening, a synchronous groove which is favorable for synchronous rotation can be arranged on the handle, the disassembly button can be conveniently and synchronously rotated, the disassembly button is inwards propped against the disassembly opening, the handle is compressed at the moment, the handle can be pulled out, the handle is inserted outside the driving rod, the handle is inserted and is inserted into the handle after the handle is inserted into the position, the elastic button is reset into the opening, and the disassembly is completed, and the assembly is simple, namely the disassembly and assembly is completed.
Working principle of synchronous steel wire rope linkage assembly: when the tricycle for children needs to turn right, the steering handle is rotated to drive the rear positioning block to rotate, the right wire rope is pulled to be pulled after being tightened in the rotation process, the left wire rope is forced to be pulled forwards, namely the front positioning block is synchronously driven to turn right, and then the handle bar is driven to rotate right, so that the right turning operation of the tricycle is completed, the left turning operation is reversed, the linkage structure is simpler, the disassembly and the assembly are more convenient, the cost is reduced, and the phenomenon that the wire rope shakes up and down and left and right in the steering process is guaranteed not to occur through the guiding limiting effect of the guiding block and the front guiding piece, so that the operation is more stable; the steel wire rope is flexible and adjustable, and tightness can be adjusted through the steel wire rope tensioner.
In the embodiment of the invention, the rear frame comprises a left swinging member A3 and a right swinging member A4 which are connected with each other in a rotating way through a vertical rotating rod A2, a yielding port A6 for installing a synchronizing plate A5 is reserved between the left swinging member and the right swinging member, the synchronizing plate is overlapped with the center of the left swinging member and penetrates through the rotating rod, the synchronizing plate extends back and forth to form a strip shape, a strip-shaped hole A7 is penetrated and arranged on the synchronizing plate, a left synchronizing bar A8 is hinged to the lower end face of the left swinging member, a right synchronizing bar A9 is hinged to the opposite face of the lower end face of the right swinging member, and the side, away from the hinge side of the left swinging member and the hinge side of the right synchronizing bar, of the left swinging member and the right swinging member are respectively positioned on the upper side and the lower side of the strip-shaped hole and sequentially penetrates through a synchronizing round bar.
In the embodiment of the invention, the left swinging member comprises a cylindrical left swinging block A11 and a left supporting leg A12 fixedly connected to the left side of the left swinging block, the right swinging member comprises a cylindrical right upper swinging block A13 and a right lower swinging block A14 which are used for being clamped on the upper side and the lower side of the left swinging block, the right side of the right upper swinging block and the right lower swinging block is fixedly connected with a right supporting leg A15 which is symmetrical to the left supporting leg, the abdicating opening is arranged between the right lower swinging block and the left swinging block, rear wheels of the vehicles are respectively arranged at the rear ends of the two supporting legs, and the angle of the rear wheels of the vehicles is regulated to be parallel to the left side and the right side after the opening and closing angle is regulated, so that excessive description is omitted.
In the embodiment of the invention, the upper right swing block vertically penetrates through an elliptical through hole A16, a limit block A17 is inserted in the through hole, a raised line A18 which is beneficial to synchronous swing of the limit block and the upper right swing block is projected from the inner wall of the through hole, a limit groove A19 for inserting the lower end of the limit block is concavely arranged on the upper surface of the left swing block, the limit groove extends along the arc direction of the circumferential direction of the left swing block, two vertically extending transposition holes A20 are formed on the upper surface of the limit block, springs A21 are arranged in the transposition holes, and an adjusting button A22 is arranged above the limit block and is matched and transposed with the two springs to be propped against each other.
In the embodiment of the invention, at least two left positioning holes A23 are vertically formed in the left swinging block in a penetrating manner, at least two right positioning holes A24 which are matched with the left positioning holes in a swinging manner are formed in the right upper swinging block, and the right positioning holes and at least one of the left positioning holes are sequentially inserted into the left positioning holes and the right positioning holes from top to bottom to be positioned through bolts A25 when the right positioning holes and the left positioning holes are coaxial.
In the embodiment of the invention, the outer cover after the left swing block, the right upper swing piece and the right lower swing block are combined is provided with the outer cover A26, the left side and the right side of the outer cover are respectively provided with a through hole for the left leg and the right leg to extend out, the rotating rod extends downwards from the top of the outer cover to penetrate out of the outer cover, and the bottom of the rotating rod can be provided with a nut to prevent falling.
In the embodiment of the invention, a base plate A28 is arranged between the limiting block and the base plate, the base plate is fixedly connected to the outer cover, the base plate and the sheet metal part are integrally formed, a round hole A29 for the protrusion of the adjusting button is formed in the outer cover, an anti-drop groove A30 with the diameter larger than that of the round hole is coaxially formed in one side, close to the base plate, of the round hole, the inner end of the adjusting button is matched with the anti-drop groove through a flange protruding from the outer end of the adjusting button, a jacking block A31 protrudes backwards from the rear end face of the adjusting button, the jacking block penetrates through the base plate and is matched and jacked with a sliding block A32 fixedly connected with the tops of the two springs, and a sliding hole A33 for the jacking block to penetrate through and jacked into the sliding block is formed in the base plate.
In the embodiment of the invention, the lower end surface of the left swing block is downwards protruded with a left limiting plate A34 with the same thickness as the left synchronous bar, and the left limiting plate horizontally extends towards the center and passes through the rotating rod; the right limiting plate A35 which is equal to the right synchronizing bar in thickness protrudes upwards from the upper surface of the right lower swinging block, the right limiting plate horizontally extends towards the center and penetrates through the rotating rod, the left limiting plate is arranged in parallel with the left synchronizing bar, the right limiting plate is arranged in parallel with the right synchronizing bar, and the two synchronizing bars can be prevented from tilting reversely during rotation.
In the embodiment of the invention, the strip-shaped holes vertically penetrate through the near-rear end of the synchronizing plate, the strip-shaped holes extend forwards and backwards, and the left synchronizing bar and the right synchronizing bar extend to the strip-shaped holes obliquely backwards.
In the embodiment of the invention, an arc-shaped guard plate A36 is fixedly arranged on the butt joint side edge of the left swing block and the left supporting leg, the upper end of the guard plate vertically extends to be level with the upper end of the upper right swing block, the lower end of the guard plate vertically extends to be level with the lower end of the lower right swing block, and the inner end of the guard plate is fixedly connected to the outer wall of the left swing block.
The operating principle of the opening and closing angle adjusting assembly is that when the opening and closing angle between rear wheels of the vehicle is required to be adjusted, the bolt is pulled out firstly, then the adjusting button is pressed downwards, the sliding block is pressed into the transposition hole from the sliding hole quickly by jacking, the spring is compressed, then one supporting leg can swing inwards and outwards, if the right supporting leg swings inwards, the right synchronizing bar swings forwards in the bar hole, the left synchronizing bar swings forwards synchronously in the bar hole through connection of the synchronizing round bar, namely the left supporting leg swings inwards synchronously, synchronous swinging is realized, the right supporting leg swings in a limiting mode in a limiting groove below through the bump in a limiting mode when swinging, namely the swinging angle of the two supporting legs is limited, the sliding block slides on the sheet metal part through spring jacking, other transposition holes are matched with the sliding hole and pushed in through spring stretching after swinging in place, the adjusting button is jacked on the adjusting button again, and the adjusting button is loosened, at least one bolt in the right positioning hole and the left positioning hole is coaxial at the moment, so that positioning is reinserted.
In the embodiment of the invention, the rear frame comprises a sheet metal part C3 with a U-shaped cross section, two sides of the lower end of the sheet metal part are downwards protruded with a convex part C4 and hinged with the main frame through the convex part, a folding button C5 which vertically extends and penetrates out of the sheet metal part from the top end is arranged in the sheet metal part, the lower end of the folding button is propped against the inner bottom end of the sheet metal part through a return spring C6, the front end surface of the folding button horizontally protrudes out of a hook C7 and penetrates out of the sheet metal part to be connected with the main frame in a hanging mode, and the rear end of the main frame is provided with a notch C8 connected with the hook in a hanging mode.
In the embodiment of the invention, the main frame comprises a main beam B1, the rear end of the main beam is fixedly connected with a vertical butt joint plate C10, the left end and the right end of the butt joint plate are respectively extended backwards to form wing plates C11, the lower ends of the two wing plates correspond to the two convex parts and are penetrated and hinged by a distribution shaft C12, and through holes for a pin shaft to pass through are formed in the wing plates and the convex parts.
In the embodiment of the invention, the main beam can be formed by a hollow pipe made of a hard metal material, the notch is formed on the butt joint plate and is communicated with the inner cavity of the main beam, the sheet metal part is provided with a yielding port C13 which is matched with the notch and is used for the hook to shift up and down, and the end part of the hook protrudes upwards in an inclined way so as to be propped against the inner wall of the butt joint plate after being inserted into the notch for preventing the hook from falling off.
In the embodiment of the invention, the lower end of the folding button is upwards provided with the limiting circular groove C14 for propping the spring, so as to limit the vertical position of the spring and prevent the spring from tilting to influence the resetting of the folding button.
In the embodiment of the invention, the U-shaped opening of the sheet metal part faces backwards, the sheet metal part comprises fixing plates C15 which are parallel up and down, the front ends of the fixing plates are fixedly connected through vertical connecting plates C16, the convex parts are fixedly connected to the left end and the right end of the fixing plate at the lower side, and the fixing plates, the connecting plates and the convex parts are integrally formed.
The working principle of the folding component is as follows: when the rear frame of the vehicle is required to be folded, the folding button is pressed, the spring is compressed, the hook descends, the whole rear frame of the vehicle can be simultaneously turned forward around the hinge point, the hook is enabled to be separated from the notch, the folding button can be loosened, the spring is reset, the folding work of the rear frame of the vehicle and the main frame is completed, and the operation steps are simple, convenient and easy to fold.
The present invention is not limited to the above-described preferred embodiments, and any person can obtain various other forms of multi-functional foldable child tricycles and methods of operating the same under the teaching of the present invention. All equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.