Motorcycle reverse gear shifter

Abstract

The utility model relates to the technical field of motorcycle spare and accessory parts, in particular to a motorcycle reverse gear shifter. The transmission mechanism comprises a reverse gear box and a gear lever mechanism, the gear lever mechanism is rotationally connected with a reverse gear, an input gear and an output gear are arranged in the reverse gear box, the reverse gear can be meshed with the input gear and the output gear at the same time to achieve transmission after reverse gear switching, and a connecting piece is arranged in the center of the output gear. A rotation limiting mechanism is arranged between the connecting piece and the output gear and comprises a limiting piece fixed to the output gear in the circumferential direction, a polygonal groove is formed in the side, close to the connecting piece, of the limiting piece, and a polygonal convex part matched with the polygonal groove is arranged on the periphery of one end of the connecting piece; the diameter of a circumcircle of the polygonal convex part is smaller than that of a circumcircle of the polygonal groove and larger than that of an incircle of the polygonal groove; after the prior art is improved, the reverse gear shifting process is smooth, operation steps are greatly simplified, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle parts and accessories, in particular to a motorcycle reverse gear shifter. Background Art

[0002] Large-displacement motorcycles, such as Harley, BMW, Honda, etc. or three-wheeled motorcycles, are very heavy and it is difficult for the vehicle to move backward, so a reverse gear mechanism is installed in the gearbox.

[0003] For example, a Chinese patent document with the authorization number CN212959804U discloses a reverse gear shifter for motorcycles, comprising a reverse gear box, a gear lever structure rotatably connected to the reverse gear box via a rotating shaft, one end of the rotating shaft is connected to a gear frame, a reverse gear is mounted on the gear frame, the gear lever structure comprises an inner lever of a gear lever, a gear lever sliding sleeve and a locking pin, the reverse gear box has a shift slot, the shift slot has two gear positions, neutral and reverse, and one end of the locking pin is penetrated into the inner side of the shift slot; currently, when the reverse gear shifter is switched to reverse gear, after pressing the clutch, the connection strength between the input shaft and the input gear is weak in neutral, but the input gear is locked in the absence of external interference. The gears are still in a rotating state, and it is easy to get stuck when directly shifting into reverse gear (the gear is not easy to shift into), so it is generally necessary to shift into 1st gear first (the input gear is in a non-rotating state), and then use the shift lever structure to make the lock pin engage in the reverse gear of the shift slot to switch to reverse gear, so that the gear rack rotates and drives the reverse gear to engage with the input gear on the input shaft and the output gear on the rear wheel output shaft respectively, then shift to neutral, and finally release the clutch, the engine drives the input shaft to drive the input gear through the reverse gear bridge gear transmission to make the output gear drive the rear wheel output shaft to rotate, and the motorcycle starts to move backward; however, the above-mentioned reverse gear shifting operation process is relatively cumbersome, time-consuming and labor-intensive.

[0004] Therefore, it is necessary to improve the above shortcomings of the prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a motorcycle reverse gear shifter in view of the above-mentioned deficiencies in the prior art, so as to solve the problem that the reverse gear shifting operation process in the prior art is relatively complicated, time-consuming and labor-intensive.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reverse gear shifter for a motorcycle, comprising a reverse gear box, a shift lever mechanism rotatably connected to the reverse gear box, the shift lever mechanism being located in the reverse gear box and rotatably connected to a reverse gear at one end, the reverse gear box also being provided with an input gear connected to an input shaft of the gearbox and an output gear linked to an output shaft of a rear wheel, the reverse gear being able to mesh with the input gear and the output gear simultaneously to achieve transmission after switching to reverse gear, a connecting piece connected to the output shaft of the rear wheel being provided at the center of the output gear, a rotation limiting mechanism being provided between the connecting piece and the output gear so as to enable relative rotation between the connecting piece and the output gear within a limited small angle range.

[0007] By adopting the above technical solution, when shifting into reverse gear, the clutch can be first pressed to shift into neutral gear, and then the reverse gear can be driven to approach the input gear and the output gear by rotating the shift lever mechanism. When the gear teeth of the reverse gear abut and squeeze the gear teeth of the output gear, the output gear can be rotated relative to the connecting member (i.e., the rear wheel output shaft) within a limited small angle range through the rotation limiting mechanism, so that the meshing between the reverse gear and the output gear is smooth and not easy to get stuck. At the same time, the output gear can limit the reverse gear in the opposite direction so that it cannot rotate freely. Then, the reverse gear can apply a reaction force to stop the input gear from rotating during the meshing and squeezing process with the input gear, and it is not easy to be bounced off by the input gear, so that the reverse gear can be smoothly meshed with the input gear and the output gear at the same time to realize the cross-bridge gear transmission, that is, the reverse gear switching is completed. After releasing the clutch, the input shaft of the gearbox can rotate to drive the input gear to rotate, and then the reverse gear is linked to the output gear, and the connecting member and the rear wheel output shaft are further linked to realize reverse driving. Obviously, the above reverse gear shifting process is smoother than the prior art and greatly simplifies the operation steps, saving time and effort.

[0008] The above technical solution is further configured as follows: the rotation limiting mechanism includes a limit member fixed circumferentially to the output gear, the limit member is provided with a polygonal groove on one side close to the connecting member, and the outer periphery of one end of the connecting member is provided with a polygonal convex portion matching the polygonal groove, the diameter of the circumscribed circle of the polygonal convex portion is smaller than the diameter of the circumscribed circle of the polygonal groove and larger than the diameter of the inscribed circle of the polygonal groove.

[0009] By adopting the above technical solution, there is a certain gap between the polygonal protrusion of the connecting member and the polygonal groove of the limiting member. When the top angle of the polygonal protrusion does not abut against the inner wall of the polygonal groove, the connecting member and the limiting member can rotate relative to each other until the top angle of the polygonal protrusion abuts against the inner wall of the polygonal groove and then stops relative rotation, thereby allowing the limiting member to rotate relative to the connecting member within a limited small angle range; since the limiting member is circumferentially fixed to the output gear, that is, the rear wheel output shaft can rotate relative to the output gear within a limited small angle range, the reverse gear and the output gear can mesh smoothly and not easily get stuck when the gear is shifted from neutral to reverse gear.

[0010] The above technical solution is further configured as follows: the gear teeth of the reverse gear, the input gear and the output gear are all configured as rounded corners.

[0011] By adopting the above technical solution, the teeth of the reverse gear, the input gear and the output gear are all set to have rounded corners, which can make the gears mesh with each other smoother.

[0012] The above technical solution is further configured as follows: a first pin groove is provided on the inner circumference of the output gear, a second pin groove is provided on the outer circumference of the limiter, and a latch is provided between the first pin groove and the second pin groove.

[0013] By adopting the above technical solution, the output gear and the limiting member are circumferentially fixed by inserting the latch into the pin groove formed by the first pin groove and the second pin groove, and disassembly and assembly are convenient.

[0014] The above technical solution is further configured as follows: a mounting through hole is provided at the center of the limiting member, and one end of the connecting member away from the polygonal protrusion is loosely matched with the mounting through hole.

[0015] By adopting the above technical solution, the connecting member and the limiting member can achieve rotational connection through the clearance fit of the installation through hole, and at the same time it is more stable.

[0016] The above technical solution is further configured as follows: a washer is provided on the side of the output gear away from the connecting member, and the washer can abut against the output gear, the limit member and the side surface of the connecting member at the same time.

[0017] By adopting the above technical solution, the gasket can prevent the output gear, the limiter and the side of the connecting piece from directly contacting the reverse gear box, thereby reducing wear and having a certain vibration buffering effect.

[0018] The above technical solution is further configured as follows: the shift lever mechanism includes a shift head, a connecting rod detachably connected to the shift head, a sliding rod detachably connected to the other end of the connecting rod, a sliding sleeve arranged outside the sliding rod, a rotating shaft that passes through the reverse gear box and is rotatably connected thereto, and a gear frame with one end connected to the rotating shaft and the other end rotatably connected to the reverse gear. A sliding pin hole is provided in the middle of the sliding rod, and one end of the rotating shaft is inserted into the sliding pin hole so that it is circumferentially fixed relative to the sliding rod and can slide axially along the sliding rod in the sliding pin hole. A mounting through hole is provided near the center of one end of the connecting rod, and a return spring is provided in the mounting through hole, one end of the return spring abuts against the rotating shaft and the other end abuts against the connecting rod. A locking pin is provided at an end of the sliding rod away from the connecting rod, and a shift groove is provided on the side of the reverse gear box, and the locking pin can be stuck in the shift groove.

[0019] By adopting the above technical scheme, when switching to reverse gear, the gear head is first pressed to drive the sliding rod to squeeze the return spring through the connecting rod, so that the rotating shaft slides axially in the sliding pin hole along the sliding rod. At the same time, the sliding rod drives the locking pin to slide to the bottom in the shift groove, and then the gear head and the connecting rod are rotated to drive the rotating shaft to rotate. The rotating shaft drives the gear rack and the reverse gear to engage with the input gear and the output gear to realize transmission. After the gear head is released, the lock pin is stuck in the reverse gear position of the shift groove under the action of the return spring; when releasing the reverse gear, the reverse rotation operation can be performed to make the lock pin re-slotted into the neutral position of the shift groove.

[0020] The above technical solution is further configured as follows: a clutch is installed in the reverse gearbox at a position corresponding to the axial direction of the input gear.

[0021] By adopting the above technical solution, the clutch relationship between the input shaft and the input gear is controlled by the clutch to cut off or transmit the power of the engine to the transmission input shaft.

[0022] The beneficial effects achieved by the utility model are: the reverse gear shifting process is smooth and the operation steps are greatly simplified, thus saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure in the embodiment of the utility model Figure 2 ;

[0025] Figure 3 It is a schematic diagram of the exploded structure of the rotation limiting mechanism in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the exploded structure of the gear lever mechanism in the embodiment of the utility model;

[0027] Figure 5 yes Figure 4 Partial view at point A in the middle;

[0028] Figure 6 It is a schematic diagram of the sliding rod structure of the shift lever mechanism in the embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-6 As shown in, a reverse gear shifter for a motorcycle comprises a reverse gearbox 1, a shift lever mechanism 2 rotatably connected to the reverse gearbox 1, the shift lever mechanism 2 is located in the reverse gearbox 1 and is rotatably connected to a reverse gear 3 at one end, the reverse gearbox 1 is also provided with an input gear 4 connected to the input shaft of the gearbox and an output gear 5 linked to the rear wheel output shaft, the reverse gear 3 can simultaneously mesh with the input gear 4 and the output gear 5 to achieve transmission after switching to reverse gear, a connecting member 6 connected to the rear wheel output shaft is provided at the center of the output gear 5, a rotation limiting mechanism is provided between the connecting member 6 and the output gear 5, the rotation limiting mechanism comprises a limiting member 7 circumferentially fixed to the output gear 5, a polygonal groove 70 is provided on the limiting member 7 close to the connecting member 6, a polygonal convex portion 61 cooperating with the polygonal groove 70 is provided on the outer periphery of one end of the connecting member 6, and the circumscribed circle of the polygonal convex portion 61 is The diameter is smaller than the diameter of the circumscribed circle of the polygonal groove 70 and larger than the diameter of the inscribed circle of the polygonal groove 70. The gear teeth of the reverse gear 3, the input gear 4 and the output gear 5 are all set to rounded corners; there is a certain gap between the polygonal protrusion 61 of the connecting member 6 and the polygonal groove 70 of the limiting member 7. When the top angle of the polygonal protrusion 61 does not abut against the inner wall of the polygonal groove 70, the connecting member 6 and the limiting member 7 can rotate relative to each other until the top angle of the polygonal protrusion 61 abuts against the inner wall of the polygonal groove 70 and then stops relative rotation, so that the limiting member 7 can rotate relative to the connecting member 6 within a limited small angle range; since the limiting member 7 is circumferentially fixed to the output gear 5, that is, the rear wheel output shaft can rotate relative to the output gear 5 within a limited small angle range, so that when the neutral gear is shifted to the reverse gear, the reverse gear 3 and the output gear 5 are smoothly meshed and not easy to get stuck.

[0031] A first pin groove 51 is provided on the inner circumference of the output gear 5, a second pin groove 71 is provided on the outer circumference of the limiter 7, and a latch 8 is provided between the first pin groove 51 and the second pin groove 71, so that the output gear 5 and the limiter 7 are circumferentially fixed by the latch 8.

[0032] A mounting through hole 72 is provided at the center of the limiting member 7, and one end of the connecting member 6 away from the polygonal protrusion 61 is loosely matched with the mounting through hole 72, thereby achieving a rotational connection and being more stable.

[0033] A washer 9 is provided on the side of the output gear 5 away from the connecting member 6. The washer 9 can abut against the output gear 5, the limit member 7 and the side of the connecting member 6 at the same time. The washer 9 can prevent the output gear 5, the limit member 7 and the side of the connecting member 6 from directly contacting the reverse gear box 1, thereby reducing wear and having a certain vibration buffering effect.

[0034] The shift lever mechanism 2 includes a shift head 21, a connecting rod 22 detachably connected to the shift head 21 by threads, a sliding rod 23 detachably connected to the other end of the connecting rod 22 by threads, a sliding sleeve 24 arranged on the outer surface of the sliding rod 23, a rotating shaft 25 that passes through the reverse gear box 1 and is rotatably connected thereto, and a gear frame 26 that is rotatably connected to the rotating shaft 25 at one end and to the reverse gear 3 at the other end. A sliding pin hole 230 is provided in the middle of the sliding rod 23, one end of the rotating shaft 25 is inserted into the sliding pin hole 230 so that it is circumferentially fixed relative to the sliding rod 23 and can slide axially along the sliding rod 23 in the sliding pin hole 230. A mounting through hole 231 is provided near the center of one end of the connecting rod 22 of the sliding rod 23, and a reset spring 27 is provided in the mounting through hole 231. One end of the reset spring 27 abuts against the rotating shaft 25 and the other end abuts against the connecting rod 22. The sliding rod 23 is away from the connecting rod 22. A locking pin 232 is provided at one end of the rod 22, and a shift groove 10 is provided on the side of the reverse gear box 1, and the locking pin 232 can be stuck in the shift groove 10; when switching to the reverse gear, the gear head 21 is first pressed to drive the sliding rod 23 to squeeze the return spring 27 through the connecting rod 22 to shrink, so that the rotating shaft 25 slides axially along the sliding rod 23 in the sliding pin hole 230. At the same time, the sliding rod 23 drives the locking pin 232 to slide to the bottom in the shift groove 10, and then the gear head 21 and the connecting rod 22 are rotated to drive the rotating shaft 25 to rotate, and the rotating shaft 25 drives the gear rack 26 and the reverse gear 3 to engage with the input gear 4 and the output gear 5 to realize transmission. Then, after the gear head 21 is released, under the action of the return spring 27, the locking pin 232 is stuck in the reverse gear position of the shift groove 10; when the reverse gear is released, the reverse rotation operation can be performed to make the locking pin 232 re-slotted into the neutral position of the shift groove 10.

[0035] A clutch 11 is installed in the reverse gearbox 1 at a position corresponding to the axial direction of the input gear 4. The clutch 11 controls the clutch relationship between the input shaft and the input gear 4 to cut off or transmit the power of the engine to the transmission input shaft.

[0036] In the above embodiment, when the reverse gear is engaged, the clutch can be pressed to the neutral gear first, and then the reverse gear 3 is driven to approach the input gear 4 and the output gear 5 by the rotation of the shift lever mechanism 2. When the gear teeth of the reverse gear 3 abut and squeeze the gear teeth of the output gear 5, the output gear 5 can be rotated within a limited small angle range relative to the connecting member 6 (i.e., the rear wheel output shaft) through the rotation limiting mechanism, so that the reverse gear 3 and the output gear 5 are meshed smoothly and not easy to get stuck. At the same time, the output gear 5 can limit the reverse gear 3 in the opposite direction so that it cannot rotate freely. Then the reverse gear 3 is in contact with the input gear 4. During the meshing and extrusion process of the gear 4, a reaction force can be applied to stop the input gear 4 from rotating, and it is not easy to be bounced off by the input gear, so that the reverse gear 3 can be smoothly meshed with the input gear 4 and the output gear 5 at the same time to realize the cross-bridge gear transmission, that is, the reverse gear switching is completed. After releasing the clutch, the input shaft of the gearbox can drive the input gear 4 to rotate, and then the output gear 5 is linked through the reverse gear 3, and the connecting piece 6 and the rear wheel output shaft are further linked to realize reverse driving; obviously, the above-mentioned reverse gear shifting process is smoother and greatly simplifies the operating steps compared with the existing technology, saving time and effort.

Claims

1. A reverse gear shifter for a motorcycle, comprising a reverse gearbox, a shift lever mechanism rotatably connected to the reverse gearbox, the shift lever mechanism being located in the reverse gearbox and having a reverse gear rotatably connected to one end thereof, the reverse gearbox also being provided with an input gear connected to an input shaft of a gearbox and an output gear linked to an output shaft of a rear wheel, the reverse gear being able to simultaneously mesh with the input gear and the output gear to achieve transmission after switching to reverse gear, characterized in that: A connecting piece connected to the rear wheel output shaft is provided at the center of the output gear, and a rotation limiting mechanism is provided between the connecting piece and the output gear to enable the connecting piece and the output gear to rotate relative to each other within a limited small angle range.

2. A motorcycle reverse gear shifter according to claim 1, characterized in that: The rotation limiting mechanism includes a limit piece fixed circumferentially to the output gear, the limit piece is provided with a polygonal groove on one side close to the connecting piece, and the outer periphery of one end of the connecting piece is provided with a polygonal convex portion matching the polygonal groove, the diameter of the circumscribed circle of the polygonal convex portion is smaller than the diameter of the circumscribed circle of the polygonal groove and larger than the diameter of the inscribed circle of the polygonal groove.

3. A motorcycle reverse gear shifter according to claim 2, characterized in that: The gear teeth of the reverse gear, the input gear and the output gear are all arranged with rounded corners.

4. A motorcycle reverse gear shifter according to claim 3, characterized in that: A first pin groove is provided on the inner circumference of the output gear, a second pin groove is provided on the outer circumference of the limiter, and a latch is provided between the first pin groove and the second pin groove.

5. A motorcycle reverse gear shifter according to claim 4, characterized in that: A mounting through hole is provided at the center of the position limiting member, and one end of the connecting member away from the polygonal protrusion is loosely matched with the mounting through hole.

6. A motorcycle reverse gear shifter according to claim 5, characterized in that: A washer is provided on the side of the output gear away from the connecting member, and the washer can abut against the output gear, the limiting member and the side surface of the connecting member at the same time.

7. A motorcycle reverse gear shifter according to any one of claims 1 to 6, characterized in that: The gear lever mechanism includes a gear head, a connecting rod detachably connected to the gear head, a sliding rod detachably connected to the other end of the connecting rod, a sliding sleeve arranged outside the sliding rod, a rotating shaft that passes through the reverse gear box and is rotatably connected to the same, and a gear frame that is rotatably connected to the rotating shaft at one end and rotatably connected to the reverse gear at the other end. A sliding pin hole is provided in the middle of the sliding rod, and one end of the rotating shaft is inserted into the sliding pin hole so that it is circumferentially fixed relative to the sliding rod and can slide axially along the sliding rod in the sliding pin hole. A mounting through hole is provided near the center of one end of the connecting rod, and a return spring is provided in the mounting through hole, one end of the return spring abuts against the rotating shaft and the other end abuts against the connecting rod. A locking pin is provided at an end of the sliding rod away from the connecting rod, and a shift groove is provided on the side of the reverse gear box, and the locking pin can be stuck in the shift groove.

8. A motorcycle reverse gear shifter according to claim 7, characterized in that: A clutch is installed in the reverse gear box at a position corresponding to the axial direction of the input gear.

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