CN217977331U

CN217977331U - Double-spring buffer shifting fork mechanism

Info

Publication number: CN217977331U
Application number: CN202221987831.9U
Authority: CN
Inventors: 罗刚; 周飞
Original assignee: Chongqing Nanbian Electromechanical Co ltd
Current assignee: Chongqing Nanbian Electromechanical Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-06
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a double-spring buffer shifting fork mechanism, which comprises a shifting fork and a shifting fork shaft, wherein a shifting fork empty sleeve is arranged on the shifting fork shaft and can freely move along the shifting fork shaft; a first limiting component and a second limiting component are also arranged on the shifting fork shaft, and the shifting fork is positioned between the first limiting component and the second limiting component; a first buffer spring and a second buffer spring are further sleeved on the shifting fork shaft, wherein the first buffer spring is positioned between the shifting fork and the first limiting component, and the shifting fork is tightly attached to the second limiting component under the action of the first buffer spring; the second buffer spring is positioned on one side, departing from the shifting fork, of the second limiting component, one end of the second buffer spring is attached to the second limiting component, and the second buffer spring can push the shifting fork shaft to move through the second limiting component. The utility model discloses simple structure, it is efficient to engage a gear, and engages a gear stability better.

Description

Double-spring buffer shifting fork mechanism

Technical Field

The utility model relates to a gearbox technical field especially relates to a double spring buffering shift fork mechanism.

Background

The gearbox is a very important part on a vehicle, is generally provided with different gears to output different transmission ratios, and is mainly used for switching between high and low gears, wherein the gearbox mainly transmits through combination of gear shifting wheels and gear gears in the gear shifting process. Generally, convex claws are arranged on two sides of a gear shifting wheel, kidney-shaped grooves are arranged on the gear shifting gear corresponding to the convex claws, and in the gear shifting process, the gear shifting wheel is driven by a shifting fork mechanism to move along the axial direction of a gear shifting shaft, so that the convex claws on the gear shifting wheel enter the kidney-shaped grooves, the gear shifting gear is driven to rotate, and then the switching of different gears is realized.

However, in the existing shifting fork mechanism, if the convex claw is not opposite to the kidney-shaped groove during the shifting operation, the convex claw collides with the gear (the part between two adjacent kidney-shaped grooves), noise is generated, the service performance and the service life of the shifting fork and the shifting part are reduced, and the shifting stability is poor. And in the starting process of the vehicle, when the gear shifting wheel does not rotate, if the convex claw is not opposite to the kidney-shaped groove, the gear can not be shifted, and at the moment, if the vehicle is started, the vehicle is in a neutral position state, can not run, and has potential safety hazards.

In addition, the existing shifting fork mechanism is based on the structure, if the shifting wheel and the gear are not structurally realized after the shifting action is completed, the shifting wheel and the gear cannot be automatically combined due to the fact that continuous force does not exist, and therefore the existing gearbox cannot realize automatic shifting through driving modes such as a motor and the like, and the development of motorcycles, electric vehicles and the like is seriously hindered.

SUMMERY OF THE UTILITY MODEL

Not enough to the above that prior art exists, the utility model aims to provide a double spring buffering shift fork mechanism can solve current shift fork mechanism when the operation of shifting gears, and the tongue combines inefficiency with gear's kidney slot, and the gear shift is poor stable, especially the starting easily causes the problem of hanging not last grade.

In order to solve the technical problem, the utility model discloses a technical scheme is such: the utility model provides a double spring buffering fork mechanism, includes shift fork and declutch shift shaft, its characterized in that: the shifting fork is sleeved on the shifting fork shaft and can move freely along the shifting fork shaft; a first limiting component and a second limiting component are further arranged on the shifting fork shaft, and the shifting fork is positioned between the first limiting component and the second limiting component; a first buffer spring and a second buffer spring are further sleeved on the shifting fork shaft, wherein the first buffer spring is positioned between the shifting fork and the first limiting component, and the shifting fork is tightly attached to the second limiting component under the action of the first buffer spring; the second buffer spring is positioned on one side, departing from the shifting fork, of the second limiting component, one end of the second buffer spring is attached to the second limiting component, and the second buffer spring can push the shifting fork shaft to move through the second limiting component.

Furthermore, one end of the first buffer spring is attached to the first limiting component, and the other end of the first buffer spring is attached to the shifting fork.

Furthermore, the first limiting component and the second limiting component both adopt clamp springs.

Furthermore, a clamping groove is formed in the shifting fork shaft and corresponds to the position of the clamp spring, the clamp spring is clamped in the clamping groove, and the outer side of the clamp spring protrudes out of the shifting fork shaft.

Compared with the prior art, the utility model has the advantages of as follows:

(1) When the shifting fork mechanism is used for shifting gears, a shifting fork shaft of the shifting fork mechanism is driven to move through the shifting fork mechanism, the shifting fork drives a shifting wheel to move along the axial direction of the shifting shaft, and the shifting fork shaft is enabled to move to a set position or move excessively (namely, the position where the shifting fork shaft stays after moving is moved, a convex claw of the shifting fork wheel can enter a kidney-shaped groove), and when the convex claw is in contact with a gear (the part between two adjacent kidney-shaped grooves) and does not directly enter the kidney-shaped groove, a buffer spring can generate a continuous pre-tightening force on the shifting fork wheel through the shifting fork; when the gear shifting wheel rotates along with the gear shifting shaft until the convex claw and the kidney-shaped groove are aligned, the gear shifting wheel can enter the kidney-shaped groove under the action of pre-compression force of the buffer spring, so that the combination of the gear shifting wheel and the gear shifting gear is completed, the gear shifting efficiency is higher, and the stability and the reliability of gear shifting can be ensured.

(2) The shifting fork mechanism is simpler in overall structure and lower in cost, flexible combination is formed between the gear shifting wheel and the gear through the buffer spring, direct collision is avoided, and noise is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The embodiment is as follows: referring to fig. 1, a double-spring buffer shifting fork mechanism comprises a shifting fork 1 and a shifting fork shaft 2. The shifting fork 1 is sleeved on the shifting fork shaft 2 in an empty way and can move freely along the shifting fork shaft 2. A first limiting member 3 and a second limiting member 4 are further arranged on the shifting fork shaft 2, and a space is reserved between the first limiting member 3 and the second limiting member 4; the fork 1 is located between a first stop member 3 and a second stop member 4. During implementation, the first limiting member 3 and the second limiting member 4 both adopt clamp springs, so that the structure is simple, and the assembly is more convenient. A clamping groove is formed in the shifting fork shaft 2 in a position corresponding to the clamping spring, the clamping spring is clamped in the clamping groove, and the outer side of the clamping spring protrudes out of the shifting fork shaft 2; thereby guaranteeing the stability of the position of the clamp spring.

A first buffer spring 5 and a second buffer spring 6 are sleeved on the shifting fork shaft 2. The first buffer spring 5 is positioned between the shifting fork 1 and the first limiting component 3, and the shifting fork 1 is tightly attached to the second limiting component 4 under the action of the first buffer spring 5; one end of the first buffer spring 5 is attached to the first limiting component 3, and the other end of the first buffer spring is attached to the shifting fork 1. The second buffer spring 6 is positioned on one side of the second limiting component 4, which deviates from the shifting fork 1, one end of the second buffer spring is attached to the second limiting component 4, and the second buffer spring can push the shifting fork shaft 2 to move through the second limiting component 4.

When the shifting fork mechanism is assembled and used, the shifting fork mechanism is arranged in a gearbox, the second buffer spring 6 is attached to the side wall of the gearbox body, and the second buffer spring 6 is in a micro-compression state; preferably, at this time, the shift wheel and the shift gear are engaged with each other by the second damper spring 6. When the shifting fork mechanism is used for shifting gears, the shifting fork shaft 2 is driven by the shifting fork mechanism to move towards the direction of the second buffer spring 6, the second buffer spring 6 is further compressed, the shifting fork 1 is pressed on the second limiting component 4 through the first buffer spring 5 all the time in the moving process of the shifting fork shaft 2, after a shifting wheel is contacted with the shifting gear, the shifting wheel is pressed on the shifting gear through the shifting fork 1 by the first buffer spring 5, and when the shifting wheel rotates to the positive alignment of the convex claw and the kidney-shaped groove along with the shifting fork shaft, the shifting wheel can enter the kidney-shaped groove under the action of the pre-pressing force of the first buffer spring 5, so that the combination of the shifting wheel and the shifting gear is completed. When the gear shifting needs to be carried out again, the pulling force on the shifting fork shaft 2 is removed through the gear shifting mechanism, at the moment, under the restoring action of the second buffer spring 6, the whole shifting fork shaft 2 is driven to move towards the first buffer spring 5 through the second limiting component 4, after the gear shifting wheel is contacted with the gear in the other direction, the second buffer spring 6 tightly presses the gear shifting wheel on the gear shifting wheel through the shifting fork 1, and when the gear shifting wheel rotates along with the gear shifting shaft until the convex claw is opposite to the kidney-shaped groove, the gear shifting wheel can enter the kidney-shaped groove under the pre-pressing action of the second buffer spring 6, so that the combination of the gear shifting wheel and the gear shifting gear is completed.

The scheme is particularly practical when a vehicle is started, before the vehicle is started, the shifting fork shaft 2 is driven through the shifting mechanism, the shifting fork shaft 2 is enabled to move to a set position or move excessively (namely, the position where the shifting fork shaft 2 stops after moving is moved, the convex claw of the gear shifting wheel can enter the kidney-shaped groove), when the convex claw is in contact with the gear (the part between two adjacent kidney-shaped grooves) and does not directly enter the kidney-shaped groove, the buffer spring can generate continuous pre-compression force on the gear shifting wheel through the shifting fork 1, and after the vehicle is started, when the gear shifting wheel rotates along with the gear shifting shaft until the convex claw is aligned with the kidney-shaped groove, gear engagement can be automatically completed. Through the design of the scheme, the combination of the gear shifting wheel and the gear shifting gear is completed, the gear shifting efficiency is higher, and the stability and the reliability of gear shifting can be ensured; and moreover, the shifting fork mechanism is simpler in overall structure and lower in cost, and due to the arrangement of the buffer spring, the shifting wheel and the shifting gear are flexibly combined, so that direct collision is avoided, and noise is reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions.

Claims

1. The utility model provides a double spring buffering fork mechanism, includes shift fork and declutch shift shaft, its characterized in that: the shifting fork is sleeved on the shifting fork shaft in an empty way and can move freely along the shifting fork shaft; a first limiting component and a second limiting component are further arranged on the shifting fork shaft, and the shifting fork is positioned between the first limiting component and the second limiting component; a first buffer spring and a second buffer spring are further sleeved on the shifting fork shaft, wherein the first buffer spring is positioned between the shifting fork and the first limiting component, and the shifting fork is tightly attached to the second limiting component under the action of the first buffer spring; the second buffer spring is positioned on one side, away from the shifting fork, of the second limiting component, one end of the second buffer spring is attached to the second limiting component, and the second buffer spring can push the shifting fork shaft to move through the second limiting component.

2. A double spring buffer fork shift mechanism according to claim 1, wherein: one end of the first buffer spring is attached to the first limiting component, and the other end of the first buffer spring is attached to the shifting fork.

3. A double spring buffer fork shift mechanism according to claim 1, wherein: the first limiting component and the second limiting component both adopt clamp springs.

4. A double spring buffer fork shift mechanism according to claim 3, wherein: and a clamping groove is arranged on the shifting fork shaft and corresponds to the position of the clamping spring, the clamping spring is clamped in the clamping groove, and the outer side of the clamping spring protrudes out of the shifting fork shaft.