CN111421998B - Ratchet wheel boosting mechanism - Google Patents

Abstract

The invention provides a ratchet wheel power-assisted mechanism, which relates to the field of machine auxiliary equipment and aims to solve the problem that the rated load of a logistics carrying vehicle can reach 5T, and in actual operation, when the load exceeds 2T for starting, great force is required to overcome static friction force. Including operation control box, control line, connecting seat welding piece, helping hand wheel part, driven control line driver plate, allies oneself with axle sleeve, beat pressure connecting rod welding piece, control line fixed plate, operation control box is located whole assist drive mechanism's the top, the connecting seat welding piece is located the below of operation control box, helping hand wheel part is located the below of connecting seat welding piece, helping hand wheel part equipartition is in the both sides of allies oneself with axle sleeve, driven control line driver plate is located the interior survey of helping hand wheel part, the control line fixed plate is connected on helping hand wheel part, all through control line connection control between operation control box and the helping hand wheel part, the pressure connecting rod welding piece is installed to control line fixed plate top.

Description

Ratchet wheel boosting mechanism

Technical Field

The invention relates to the field of auxiliary equipment of machines, in particular to a ratchet wheel power-assisted mechanism.

Background

The prior similar product power-assisted mechanism adopts a tooth type ratchet mechanism, the rotation angle of the ratchet wheel can only be multiple of the central angle clamped by two adjacent teeth, and can only be adjusted in a step mode, so that noise and tooth tip abrasion are easily caused, and the transmission stability is poor. In addition, the power assisting mechanism needs to be arranged on the inner side of the driving force, and due to the limited space on the inner side, the direction control of the tooth type ratchet mechanism needs to simultaneously have at least 2 gears, so that the thickness of a single gear piece cannot be too thick, the stress strength cannot be too high, and the power assisting mechanism is generally suitable for assisting a tray carrier with the power of about 2-3T.

Disclosure of Invention

The invention provides a ratchet wheel power-assisted mechanism, which aims to solve the problems that the rated load of a logistics carrying vehicle in the prior art can reach 5T, and in actual operation, when the load exceeds 2T, the logistics carrying vehicle needs great force to overcome static friction force.

In order to solve the technical problems, the invention provides a ratchet wheel power-assisted mechanism which comprises an operation control box, an operating wire, a connecting seat welding piece, a power wheel part, a driven control wire driving plate, a coupling sleeve, a pressing connecting rod welding piece and a control wire fixing plate, wherein the operation control box is positioned at the top of the whole power-assisted mechanism, the connecting seat welding piece is positioned below the operation control box, the power wheel part is positioned below the connecting seat welding piece, the power wheel part is uniformly distributed on two sides of the coupling sleeve, the driven control wire driving plate is positioned at the inner side of the power wheel part, the control wire fixing plate is connected onto the power wheel part, the operation control box and the power wheel part are connected and controlled through the operating wire, and the pressing connecting rod welding piece is arranged above the control wire fixing plate.

Preferably, helping hand wheel part still includes helping hand wheel main part, apron, fastening screw, tension spring, iron core wheel, shifting block, dials axle, rotor plate, driver plate, kingpin, the apron passes through fastening screw fixed connection in the side of helping hand wheel main part, tension spring fixed connection is in helping hand wheel main part, the iron core wheel is located the interior survey of helping hand wheel main part, dial the axle and wear to establish on the iron core wheel, dial epaxial being connected with shifting block, install the driver plate in the helping hand wheel main part, install the kingpin on the driver plate, the rotor plate is installed along the position outward at the driver plate.

Preferably, the power-assisted wheel main part is wedge-shaped, a guide groove is formed in the power-assisted wheel main part, a gap is formed between the guide groove and the shifting shaft, and the two sides of the gap are small and the middle of the gap is large.

Preferably, the number of the needle rollers is six, the needle rollers are arranged on the power-assisted wheel main body, circular grooves and wedge-shaped grooves are formed in the power-assisted wheel main body, three of the needle rollers can freely rotate in the circular grooves, and the remaining three of the needle rollers are arranged in the wedge-shaped grooves.

Preferably, one end of the tension spring is connected with the rotating plate, and the other section of the tension spring is connected with the shifting block.

Preferably, the boosting wheel main body is connected with the pressing connecting rod welding piece.

The invention has the following beneficial effects:

(1) The stepless intermittent motion of the invention leads the operation to be smooth, the mechanism realizes the overrunning motion, and the operator can realize the subsequent pushing by manpower only by using the power-assisted mechanism to overcome the static friction force during the starting; the problem that the material handling vehicle is difficult to push manually under an overlarge load is solved;

(2) The invention presses the handle to drive the wheels to advance or retreat step by utilizing the lever principle, thereby achieving the effect of labor saving, realizing the function of bidirectional overrunning clutch in the same groove, realizing the neutral gear function, simultaneously applying pretightening force by the control mechanism through two springs, and enabling the deflector rod to cross the rotation center in the stress direction on the control gear to realize the self-locking function.

Drawings

FIG. 1 is a general schematic view of a ratchet assist mechanism according to the present invention;

FIG. 2 is an overall schematic view of a booster wheel assembly in a ratchet assist mechanism according to the present invention;

FIG. 3 is a cross-sectional view of a booster wheel unit in the ratchet boosting mechanism according to the present invention;

FIG. 4 is a shift schematic of the ratchet assist mechanism according to the present invention;

FIG. 5 is a schematic diagram of the operation of the booster wheel assembly in the ratchet boosting mechanism according to the present invention;

the device comprises anoperation control box 1, anoperation control wire 2, a connectingseat welding piece 3, aboosting wheel 4, aboosting wheel 401, a boosting wheelmain body 402, acover plate 403, afastening screw 403, atension spring 404, acore wheel 405, a shiftingblock 406, a shiftingshaft 407, a rotatingplate 408, ashifting plate 409, arolling needle 410, a driven control wire shifting plate 5, acoupling sleeve 6, a pressing connectingrod welding piece 7 and a controlwire fixing plate 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.

As shown in fig. 1-5, the present invention provides a ratchet wheel assist mechanism, which comprises anoperation control box 1, anoperation wire 2, a connectingseat welding part 3, anassist wheel part 4, a driven control wire drive plate 5, acoupling sleeve 6, a pressing connectingrod welding part 7 and a controlwire fixing plate 8, wherein theoperation control box 1 is located at the uppermost position of the whole assist mechanism, the connectingseat welding part 3 is located below theoperation control box 1, theassist wheel part 4 is located below the connectingseat welding part 3, theassist wheel parts 4 are uniformly distributed at two sides of thecoupling sleeve 6, the driven control wire drive plate 5 is located at the inner side of theassist wheel part 4, the controlwire fixing plate 8 is connected to theassist wheel part 4, theoperation control box 1 and theassist wheel part 4 are both connected and controlled through theoperation wire 2, and the pressing connectingrod welding part 7 is installed above the controlwire fixing plate 8.

Further, the assistingwheel component 4 further includes an assisting wheelmain body 401, acover plate 402, afastening screw 403, atension spring 404, aniron core wheel 405, a shiftingblock 406, ashifting shaft 407, arotating plate 408, adial 409 and aroller pin 410, thecover plate 402 is fixedly connected to the side surface of the assisting wheelmain body 401 through thefastening screw 403, thetension spring 404 is fixedly connected to the assisting wheelmain body 401, theiron core wheel 405 is located on the inner side of the assisting wheelmain body 401, the shiftingshaft 407 is arranged on theiron core wheel 405 in a penetrating manner, the shiftingblock 406 is connected to the shiftingshaft 407, thedial 409 is installed on the assisting wheelmain body 401, theroller pin 410 is installed on thedial 409, and the rotatingplate 408 is installed at the outer edge position of thedial 409.

Further, themain body 401 of the power-assisted wheel is wedge-shaped, a guide groove is formed in themain body 401 of the power-assisted wheel, a gap is formed between the guide groove and the shiftingshaft 407, and two sides of the gap are small while the middle is large.

Further, the number of theneedle rollers 410 is six, theneedle rollers 410 are disposed on the assisting wheelmain body 401, circular grooves and wedge-shaped grooves are disposed on the assisting wheelmain body 401, three of theneedle rollers 410 can freely rotate in the circular grooves, and the remaining three of theneedle rollers 410 are disposed in the wedge-shaped grooves.

Further, one end of thetension spring 404 is connected to therotating plate 408, and the other end is connected to thedial 406.

Further, the booster wheelmain body 401 is connected to thepressing link weldment 7.

The gear shifting principle of the ratchet wheel power-assisted mechanism is as follows:

forward gear: the shiftingblock 406 is shifted to the rightmost side, theneedle roller 410 is linked with thedial 409, and a gap formed between the guide groove on the power assisting wheelmain body 401 and the shiftingshaft 407 is formed on one side, wherein the gap is small on two sides and large in the middle, so that the shiftingshaft 407 and theneedle roller 410 are friction-locked in the counterclockwise direction and friction-rotate in the clockwise direction;

neutral gear: the shiftingblock 406 shifts to the middle, theneedle roller 410 is kept in the middle of a gap formed by a guide groove on the power assisting wheelmain body 401 and the shiftingshaft 407 under the linkage of thedial 409, and theneedle roller 410 and the shiftingshaft 407 have direct gaps and are not in contact, so the shiftingshaft 407 can rotate freely;

back gear: the principle is the same as that of the forward gear, and the direction is opposite.

The self-locking principle of the ratchet wheel boosting mechanism is as follows: the shifting block slides on the arc-shaped track and also slides in the horizontal groove of the shifting shaft, so that when the shifting block is shifted to the leftmost side or the rightmost side, the tension directions of the two springs are below the rotation center, and the self-locking function is achieved.

In conclusion, the stepless intermittent motion of the invention leads the operation to be smooth, the mechanism realizes the overrunning motion, and the operator can realize the subsequent pushing by manpower only by using the power-assisted mechanism to overcome the static friction force during the starting; the problem that the material handling vehicle is difficult to manually push under an overlarge load is solved; the handle is pressed through the lever principle to drive the wheels to advance or retreat step by step, the labor-saving effect is achieved, the bidirectional overrunning clutch function is achieved in the same groove, the neutral gear function can be achieved, the control mechanism applies pre-tightening force through the two springs at the same time, and the driving lever stress direction is enabled to cross the rotation center to achieve the self-locking function in the control gear.

It should be noted that various standard components used in the present invention are commercially available, non-standard components are specially customized, and the connection manner adopted in the present invention, such as bolting, welding, etc., is also a very common means in the mechanical field, and the inventor does not need to describe herein any further.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (2)

1. A ratchet wheel power-assisted mechanism comprises an operation control box (1), a control wire (2), a connecting seat welding piece (3), a power-assisted wheel component (4), a driven control wire drive plate (5), a coupling sleeve (6), a pressing connecting rod welding piece (7) and a control wire fixing plate (8), and is characterized in that the operation control box (1) is located at the top of the whole power-assisted mechanism, the connecting seat welding piece (3) is located below the operation control box (1), the power-assisted wheel component (4) is located below the connecting seat welding piece (3), the power-assisted wheel component (4) is uniformly distributed on two sides of the coupling sleeve (6), the driven control wire drive plate (5) is located on the inner side of the power-assisted wheel component (4), the control wire fixing plate (8) is connected to the power-assisted wheel component (4), the operation control box (1) and the power-assisted wheel component (4) are connected and controlled through the control wire (2), and the pressing connecting rod welding piece (7) is installed above the control wire fixing plate (8);

the power assisting wheel component (4) further comprises a power assisting wheel main body (401), a cover plate (402), a fastening screw (403), a tension spring (404), an iron core wheel (405), a shifting block (406), a shifting shaft (407), a rotating plate (408), a shifting plate (409) and a rolling needle (410), wherein the cover plate (402) is fixedly connected to the side face of the power assisting wheel main body (401) through the fastening screw (403), the iron core wheel (405) is located on the inner side of the power assisting wheel main body (401), the shifting shaft (407) penetrates through the power assisting wheel main body (401), the shifting block (406) is connected to the shifting shaft (407), the shifting plate (409) is installed on the power assisting wheel main body (401), the rolling needle (410) is installed on the shifting plate (409), and the rotating plate (408) is installed at the outer edge position of the shifting plate (409);

the power-assisted wheel main body (401) is wedge-shaped, a guide groove is formed in the power-assisted wheel main body (401), a gap is formed between the guide groove and the poking shaft (407), and two sides of the gap are small, and the middle of the gap is large;

the number of the needle rollers (410) is six, the needle rollers (410) are arranged on the power-assisted wheel main body (401), circular grooves and wedge-shaped grooves are formed in the power-assisted wheel main body (401), three of the needle rollers (410) can freely rotate in the circular grooves, and the remaining three of the needle rollers (410) are arranged in the wedge-shaped grooves;

one end of the tension spring (404) is connected with the rotating plate (408), and the other end of the tension spring (404) is connected with the shifting block (406).

2. The ratchet assist mechanism according to claim 1, wherein the assist wheel main body (401) is connected to the striking link weldment (7).

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