Gear shifting structure and transmission

Abstract

The gear shifting structure is located on the side face of a box body and connected to a shifting fork, the gear shifting structure comprises a driving shaft which is rotationally arranged on the box body and provided with a driving block, a sliding groove is formed in the end, away from the driving shaft, of the driving block, the shifting fork is provided with a driving rod, and the driving rod is clamped in the sliding groove in a sliding mode; the gear shifting piece is arranged at the end, away from the driving block, of the driving shaft and provided with a first connecting part and a second connecting part which are distributed on the two sides of the driving shaft, and when the first connecting part or the second connecting part rotates with the driving shaft as the axis, the driving block is driven to swing with the driving shaft as the axis so as to drive the shifting fork to move. When the mounting direction of the transmission is changed, a gear shifting inhaul cable of a vehicle can be selectively mounted on the first connecting part or the second connecting part to ensure that the shifted gears are the same when acting force in the same direction is applied, so that operation errors caused by different layouts are reduced, the use experience of an operator is improved, and the practicability is high. And the device adapts to customized gear operation instructions of the vehicle and adapts to operation of an operator.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a shifting structure and a transmission. Background Art

[0002] A shifting structure is provided in the transmission of a tricycle to change gears, that is, by switching the front and rear axial positions of a shifting fork, and a synchronizer is used to perform adjacent gear shifting on two adjacent gear pairs arranged side by side, so that the tricycle can run more efficiently and smoothly. However, due to the different overall layouts of tricycles, when the installation orientation of the transmission changes, the shifting method (the pushing and pulling direction) will also change accordingly, and the situation of operator's operation errors often occurs, which has certain potential safety hazards. Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a shifting structure and a transmission, which solve the problems that when the installation orientation of the transmission in the prior art changes, the shifting method will also change accordingly, and the situation of operator's operation errors often occurs, which has certain potential safety hazards.

[0004] According to the embodiments of the utility model, the following technical solutions are adopted:

[0005] A shifting structure is located on the side of a box body and is connected to a shifting fork, and includes:

[0006] A driving shaft is rotatably arranged in the box body and is provided with a driving block. A sliding groove is formed at one end of the driving block far from the driving shaft. The shifting fork is provided with a driving rod, and the driving rod is slidably clamped in the sliding groove;

[0007] A shifting piece is arranged at one end of the driving shaft far from the driving block, and has a first connecting portion and a second connecting portion distributed on both sides of the driving shaft. When the first connecting portion or the second connecting portion rotates around the driving shaft as the axis, it drives the driving block to swing around the driving shaft as the axis, so as to drive the shifting fork to displace.

[0008] Preferably, the shifting piece is provided with an installation sleeve located between the first connecting portion and the second connecting portion. The installation sleeve is sleeved on the end of the driving shaft, and a pin is inserted through the installation sleeve, and the pin penetrates through the driving shaft.

[0009] Preferably, a limiting portion is fixedly arranged at one end of the pin, and a limiting ring is arranged at the other end, and both the limiting ring and the limiting portion are abutted against the installation sleeve.

[0010] Preferably, a through hole is formed at one end of the pin close to the limiting ring, and an elastic pin is inserted through the through hole, and the elastic pin abuts against the limiting ring.

[0011] Preferably, it further includes a fixing plate which is arranged on the side of the box body and is provided with a limiting plate. The end of the limiting plate is bent outward to form a first bending part, and two limiting grooves corresponding to the first connecting part and the second connecting part are formed in the first bending part.

[0012] Preferably, a supporting plate is arranged on the side of the fixing plate away from the limiting plate. The end of the supporting plate is bent outward to form a second bending part. A limiting rod is penetrated through the second bending part. An extrusion part is arranged on the side of the shift piece away from the first connecting part. One end of the limiting rod is movably connected to the extrusion part, and a compression spring is sleeved on the limiting rod. The compression spring abuts between the second bending part and the extrusion part.

[0013] Preferably, a plurality of bolts penetrate through the fixing plate, and the plurality of bolts are in threaded connection with the box body.

[0014] According to the embodiments of the present invention, the following technical solutions are also adopted in the present invention:

[0015] A transmission includes a shifting structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this solution, when connecting the shift cable of the vehicle to the first connecting part of the shift piece, by pulling the shift cable, the shift piece rotates clockwise, so that the shift piece drives the drive shaft to rotate clockwise, and then the drive block swings clockwise, enabling the fork to drive the synchronizer to move from the neutral gear to the constant speed gear. When pushing the first connecting part by the shift cable, the shift piece rotates counterclockwise, so that the fork drives the synchronizer to move from the constant speed gear to the neutral gear and can move to the power boost gear; at the same time, when the shift cable is connected to the second connecting part of the shift piece, by pushing the shift cable, the shift piece rotates clockwise, which can make the fork drive the synchronizer to move from the neutral gear to the constant speed gear, and pulling the shift cable makes the shift piece rotate counterclockwise, and the fork drives the synchronizer to move from the constant speed gear to the neutral gear and can move to the power boost gear. No matter how the installation orientation of the transmission changes, the operation direction of the shift piece remains the same, reducing operation errors caused by different layouts and improving the user experience of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of one gear position in the embodiment of the present invention.

[0019] Figure 2 It is Figure 1 the cross-sectional schematic diagram of

[0020] Figure 3 It is a schematic structural diagram of another gear position in the embodiment of the present invention.

[0021] Figure 4 It isFigure 3 Schematic cross-sectional view.

[0022] Figure 5 is Figure 1 Partial enlarged view of.

[0023] In the above-mentioned drawings: 1. Shift piece; 101. First connecting part; 102. Second connecting part; 103. Mounting sleeve; 104. Extrusion part; 2. Drive shaft; 201. Driving block; 202. Chute; 3. Fork; 301. Driving rod; 4. Limiting rod; 401. Extrusion spring; 5. Fixed plate; 501. Limiting groove; 502. Limiting plate; 503. Support plate; 504. First bending part; 505. Second bending part; 6. Pin; 601. Limiting part; 602. Limiting ring; 603. Elastic retaining pin; 7. Box body. Specific implementation mode

[0024] The technical solutions in the present utility model will be further described below in conjunction with the drawings and embodiments.

[0025] As Figures 1 to 4 shown, an embodiment of the present utility model provides a shifting structure, which is located on the side of the box body 7 and is connected to the fork 3, and includes:

[0026] A drive shaft 2 is rotatably arranged in the box body 7 and is provided with a driving block 201. A chute 202 is formed at one end of the driving block 201 away from the drive shaft 2. The fork 3 is provided with a driving rod 301, and the driving rod 301 is slidably clamped in the chute 202;

[0027] A shift piece 1 is arranged at one end of the drive shaft 2 away from the driving block 201, and has a first connecting part 101 and a second connecting part 102 distributed on both sides of the drive shaft 2. When the first connecting part 101 or the second connecting part 102 rotates around the drive shaft 2 as the axis, it drives the driving block 201 to swing around the drive shaft 2 as the axis, so as to drive the fork 3 to displace.

[0028] In the embodiment of the present utility model, taking Figure 1 , Figure 2 as an example, Figure 1 , Figure 2 are constant speed gears. In the initial state, the fork 3 and the synchronizer connected to the fork 3 are in the neutral position, that is, Figure 2 the middle of the shaft body, and taking the vehicle's shift cable is connected to the first connecting part 101 of the shift piece 1 as an example. When the shift cable is pulled by the shift lever, the shift piece 1 rotates clockwise, and drives the connected drive shaft 2 to rotate clockwise, so that the driving block 201 swings clockwise, and the fork 3 drives the synchronizer to move from neutral to the constant speed gear, that is, Figure 1 , Figure 2In the shown state, when returning to the neutral position, the shift cable is pushed by the shift lever, causing the shift piece 1 to rotate counterclockwise. As a result, the shift fork 3 drives the synchronizer to move from the constant speed gear to the neutral gear. During subsequent use, the shift cable can be pushed by the shift lever again to make the shift piece 1 continue to rotate counterclockwise, and the shift fork 3 drives the synchronizer to move from the neutral gear to the power boost gear, that is Figure 3 , Figure 4 display the gear position.

[0029] Since the positions of the first connecting portion 101 and the second connecting portion 102 are opposite, when the vehicle's shift cable is connected to the second connecting portion 102, when the shift cable is pulled by the shift lever, the shift cable pulls the shift piece 1 and makes the shift piece 1 rotate counterclockwise. When the shift cable is pushed by the shift lever, the shift piece 1 rotates clockwise. Applying the same-direction force to the shift piece 1 when the shift cable is connected to the first connecting portion 101 and the second connecting portion 102 will cause the rotation direction of the shift piece 1 to be opposite and also cause the gear position to change. When the installation orientation of the transmission changes, the vehicle's shift cable can be selected to be installed on the first connecting portion 101 or the second connecting portion 102 to ensure that when applying the same-direction force, the shifted gear positions are the same, reducing operation errors caused by different layouts, improving the user experience of the operator, and also being able to adapt to the already customized gear operation instructions of the vehicle, making it more suitable for the operation of the operator.

[0030] Specifically, as Figure 2 shown, the shift piece 1 is provided with a mounting sleeve 103 located between the first connecting portion 101 and the second connecting portion 102. The mounting sleeve 103 is sleeved on the end of the drive shaft 2, and a pin 6 is inserted through the mounting sleeve 103, and the pin 6 penetrates through the drive shaft 2; the mounting sleeve 103 is sleeved on the end of the drive shaft 2 and fixed by the pin 6, which can ensure that the shift piece 1 is firmly installed on the drive shaft 2, preventing unnecessary loosening or misalignment during its operation. Moreover, the pin 6 makes the installation and disassembly of the shift piece 1 simpler and faster, facilitating rapid assembly on the production assembly line and also being convenient for later maintenance.

[0031] Specifically, as Figure 5 shown, a limiting portion 601 is fixedly provided at the end of the pin 6, and a limiting ring 602 is provided at the other end, and both the limiting ring 602 and the limiting portion 601 abut against the mounting sleeve 103; the limiting portion 601 and the limiting ring 602 can effectively prevent the pin 6 from falling out of the mounting sleeve 103, ensuring that the pin 6 is always in the correct position and avoiding shift failure or other mechanical failures caused by the pin 6 falling out. Among them, the limiting ring 602 can be engaged with the end of the pin 6 in a threaded manner.

[0032] Specifically, as Figure 5As shown in the figure, a through hole is formed at one end of the bolt 6 close to the limit ring 602, and an elastic retaining pin 603 is inserted through the through hole. The elastic retaining pin 603 abuts against the limit ring 602. To further facilitate the installation of the limit ring 602, when the limit ring 602 is sleeved on the end of the bolt 6, the elastic retaining pin 603 can be directly inserted through the through hole of the bolt 6. Relying on the elastic force of the elastic retaining pin 603, the limit ring 602 can be made to abut against the mounting sleeve 103, ensuring the stability of the installation of the bolt 6.

[0033] Based on the above solution, as Figure 1 shown, it further includes a fixing plate 5. The fixing plate 5 is arranged on the side surface of the box body 7 and is provided with a limit plate 502. One end of the limit plate 502 is bent outward to form a first bent portion 504, and two limit grooves 501 corresponding to the first connecting portion 101 and the second connecting portion 102 are formed in the first bent portion 504. When the shift cable is connected to the first connecting portion 101 or the second connecting portion 102, the shift cable is inserted into the corresponding limit groove 501, so that the shift cable can only move along a predetermined path, ensuring the accurate execution of the shifting operation.

[0034] As Figure 1 shown, a support plate 503 is arranged on the side of the fixing plate 5 away from the limit plate 502. One end of the support plate 503 is bent outward to form a second bent portion 505. A limit rod 4 is inserted through the second bent portion 505. An extrusion portion 104 is arranged on the side of the shift piece 1 away from the first connecting portion 101. One end of the limit rod 4 is movably connected to the extrusion portion 104, and an extrusion spring 401 is sleeved on the limit rod 4. The extrusion spring 401 abuts between the second bent portion 505 and the extrusion portion 104. With the cooperation of the limit rod 4 and the extrusion spring 401, after the shifting operation of the shift piece 1 is completed, the shift piece 1 can always be subjected to the extrusion force of the extrusion spring 401, ensuring stability.

[0035] Moreover, a plurality of bolts pass through the fixing plate 5, and the plurality of bolts are threadedly connected to the box body 7. With the arrangement of the plurality of bolts, it can be ensured that the fixing plate 5 is firmly installed on the box body 7, facilitating assembly.

[0036] An embodiment of the present utility model provides a transmission, including the above-mentioned shifting structure. The specific structure of the shifting structure refers to the above-mentioned embodiment. Since this transmission adopts all the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be elaborated one by one here.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A shifting structure, located on the side of a housing (7) and connected to a shift fork (3), characterized in that: include: A driving shaft (2) is rotatably mounted on the housing (7) and is provided with a driving block (201). An end of the driving block (201) away from the driving shaft (2) is provided with a sliding groove (202). The shift fork (3) is provided with a driving rod (301). The driving rod (301) is slidably engaged with the sliding groove (202). The shift plate (1) is arranged at one end of the drive shaft (2) away from the drive block (201), and comprises a first connection part (101) and a second connection part (102) distributed on both sides of the drive shaft (2); when the first connection part (101) or the second connection part (102) rotates with the drive shaft (2) as the axis, the drive block (201) is driven to swing with the drive shaft (2) as the axis, so as to drive the shift fork (3) to move.

2. A shift structure according to claim 1, characterized in that: The shift plate (1) is provided with a mounting sleeve (103) located between the first connecting portion (101) and the second connecting portion (102); the mounting sleeve (103) is sleeved on the end of the drive shaft (2); and the mounting sleeve (103) is penetrated by a latch (6); the latch (6) passes through the drive shaft (2).

3. A shift structure according to claim 2, characterized in that: A limiting portion (601) is fixedly provided at one end of the latch pin (6), and a limiting ring (602) is provided at the other end, and the limiting ring (602) and the limiting portion (601) are both in contact with the mounting sleeve (103).

4. A shift structure according to claim 3, characterized in that: A through hole is formed at one end of the latch pin (6) close to the limiting ring (602), and an elastic locking pin (603) is inserted into the through hole. The elastic locking pin (603) is in contact with the limiting ring (602).

5. The shifting structure according to claim 1, characterized in that: The invention also comprises a fixing plate (5), wherein the fixing plate (5) is arranged on the side of the box body (7) and is provided with a limiting plate (502), wherein the end of the limiting plate (502) is bent outward to form a first bending portion (504), and the first bending portion (504) is provided with two limiting grooves (501) corresponding to the first connecting portion (101) and the second connecting portion (102).

6. A shift structure according to claim 5, characterized in that: A support plate (503) is provided on a side of the fixing plate (5) away from the limiting plate (502); an end of the support plate (503) is bent outward to form a second bending portion (505); a limiting rod (4) is passed through the second bending portion (505); a pressing portion (104) is provided on a side of the shift plate (1) away from the first connecting portion (101); one end of the limiting rod (4) is movably connected to the pressing portion (104); and a pressing spring (401) is sleeved on the limiting rod (4); the pressing spring (401) is abutted between the second bending portion (505) and the pressing portion (104).

7. A shift structure according to claim 5, characterized in that: A plurality of bolts pass through the fixing plate (5), and the plurality of bolts are threadedly connected to the box body (7).

8. A transmission, characterized in that: It comprises a shifting structure according to any one of claims 1-7.

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