CN210423683U

CN210423683U - Shifting block structure

Info

Publication number: CN210423683U
Application number: CN201921266602.6U
Authority: CN
Inventors: 刁桂全
Original assignee: Chongqing Hengyuan Powder Metallurgical Products Co ltd
Current assignee: Chongqing Hengyuan Powder Metallurgical Products Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-04-28
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a gear shifting block structure, which comprises a shifting block body and a damping component, wherein the shifting block body is provided with a mounting hole and a pin hole; the damping component comprises an outer pipe body, an inner pipe body and elastic supports, the outer pipe body is fixedly connected with the shifting block body and is located in the mounting hole, the outer pipe body is provided with a first through hole, the inner pipe body is located in the outer pipe body, the inner pipe body is provided with a second through hole and a concave-convex surface, the concave-convex surface is located on the inner peripheral side of the inner pipe body, the number of the elastic supports is multiple, the elastic supports are abutted between the outer pipe body and the inner pipe body and are evenly distributed along the peripheral side of the inner pipe body, and the elastic supports are of bent plate-shaped structures. The utility model discloses a shifting block structure of shifting, simple structure, convenient to use, it is inseparable with the declutch shift shaft cooperation, and vibration/noise reduction is effectual, long service life.

Description

Shifting block structure

Technical Field

The utility model relates to a motor transmission's technical field especially relates to a shifting block structure of shifting.

Background

In a gear shifting system of a traditional transmission, a shifting block and a shifting fork shaft generally adopt a stamping shifting block and shifting fork shaft welding structure or a shifting block and shifting fork casting connection structure. In the gear shifting process of the transmission, the shifting block is shifted through the gear shifting head and serves as a force transmission component to complete gear shifting. The shifting block and the shifting fork shaft adopt a welding structure form, and the precision is difficult to control due to large welding deformation; the stress point of the shifting block and the shifting fork casting connection structure shifting block is far away from the shifting fork axis, shifting fork deflection is easily generated, and the phenomenon of gear shifting clamping stagnation is caused. In order to overcome the problems caused by welding and casting connection of the shifting block and the shifting fork shaft, pin holes are formed in the shifting block and the shifting fork shaft, and the shifting block is connected with the shifting fork shaft through a pin. Although the problems are solved, the shifting block and the shifting fork shaft are in a gap, when the shifting block is shifted by the shifting block shifting head, the shifting block and the shifting fork shaft can move relatively, friction and collision are generated, harsh noise is generated, and the shifting block and the shifting fork shaft can be damaged for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a shifting block structure of shifting, aim at solving because shifting block and declutch shift shaft have the clearance, when the shifting block is stirred to the shifting block of shifting, shifting block and declutch shift shaft can rub and collide with, produce the noise of dazzling, still can cause the technical problem of damage to shifting block and declutch shift shaft for a long time in the past.

In order to achieve the purpose, the utility model provides a gear shifting block structure, which comprises a shifting block body and a damping component, wherein the shifting block body is provided with a mounting hole and a pin hole, and the central line of the pin hole is perpendicular to and intersected with the central line of the mounting hole; the shock absorption assembly comprises an outer pipe body, an inner pipe body and an elastic support, the outer pipe body is fixedly connected with the shifting block body, and is positioned in the mounting hole, the outer tube body is overlapped with the central line of the mounting hole, the outer tube body is provided with a first through hole, the first passage overlapping a centerline of the pin hole, the inner tube being located within the outer tube, and the central line of the inner tube body is overlapped with the central line of the outer tube body, the inner tube body is provided with a second through hole and a concave-convex surface, the center line of the second through hole is overlapped with the center line of the first through hole, the concave-convex surface is positioned on the inner peripheral side of the inner tube body, the number of the elastic supports is a plurality, the elastic supports are propped between the outer pipe body and the inner pipe body, and the elastic support is of a bent plate-shaped structure and is uniformly distributed along the peripheral side of the inner tube body.

Wherein, the cross section of the elastic support is S-shaped.

Wherein the outer tube, the inner tube and the elastic support are integrally formed.

The shifting block body is further provided with a presynchronization boss, and the presynchronization boss is located on the periphery side of the shifting block body.

The shifting block body is further provided with a silencing groove, and the silencing groove is located on the periphery of the shifting block body.

The damping assembly further comprises a plurality of damping springs, and the plurality of damping springs are abutted between the outer pipe body and the inner pipe body and are distributed with the elastic support along the peripheral side of the inner pipe body in a staggered mode.

Wherein, the shock attenuation subassembly still includes the sound absorbing layer, the sound absorbing layer is packed between interior body and outer body, the sound absorbing layer is made by polyurethane foam.

The shock absorption assembly further comprises a rubber pad, the rubber pad is fixedly connected with the inner tube body and surrounds the inner peripheral side of the rubber pad, the rubber pad is provided with a third through hole, and the third through hole is overlapped with the center line of the second through hole.

The utility model discloses a shifting block structure, during the use, installer inserts the declutch shift shaft in the mounting hole, then through insert the bolt pin pinhole, first through-hole, second through-hole and the jack that has on the declutch shift shaft realize the declutch shift body, damping component and the tight connection between the declutch shift shaft, wherein the lateral wall of declutch shift shaft closely laminates in damping component's the internal periphery side of inner tube body, because the internal periphery side is the corrugated surface, consequently increased the coefficient of friction between inner tube body and the declutch shift shaft, thereby avoid having great clearance between declutch shift shaft and the shifting block structure of shifting, in use the declutch shift shaft relative to the shifting block structure displacement of shifting, lead to take place to collide with, rub each other between inner tube body and the declutch shift shaft, and then produce the noise; on the other hand, the elastic support is abutted between the outer pipe body and the inner pipe body and is of a bent plate-shaped structure, so that when the shifting block body is shifted by the shifting block shifting head, vibration on the shifting fork shaft is transmitted to the elastic support through the inner pipe body, the elastic support can play a role in damping and adapting to vibration and displacement from the shifting fork shaft, the vibration between the shifting block body and the shifting fork shaft is buffered, and a good damping effect is achieved. The gear shifting block structure and the shifting fork shaft are isolated and damped by the damping component, and collision cannot occur, so that harsh noise cannot be generated, the shifting block body and the shifting fork shaft cannot be damaged, and the service life of the shifting block body and the shifting fork shaft can be prolonged; in addition, the damping component adopts the combination form of the outer pipe body, the inner pipe body and the elastic supports, so that the installation is more convenient, the structure is simple, the precision is high, the load is large, and the manufacturing cost is low. The utility model discloses a shifting block structure of shifting, simple structure, convenient to use, closely with the declutch shift shaft cooperation, and vibration/noise reduction is effectual, and long service life has solved because there is the clearance in shifting block and declutch shift shaft, and when the shifting block was stirred to the shifting block of shifting, the shifting block can rub with the declutch shift shaft and collide with, produces the noise of thorn ear, still can cause the technical problem of damage to shifting block and declutch shift shaft for a long time in the past.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the structure schematic diagram of the gear shifting block structure of the utility model.

Fig. 2 is the structure schematic diagram of the gear shifting block structure of the utility model.

Fig. 3 is the structure schematic diagram of the old-fashioned shifting block of the utility model.

100-gear shifting block structure, 10-shifting block body, 20-damping component, 11-mounting hole, 12-pin hole, 21-outer body, 22-inner body, 23-elastic support, 211-first through hole, 221-second through hole, 222-concave-convex surface, 13-pre-synchronous boss, 14-silencing groove, 24-damping spring, 25-sound absorbing layer, 26-rubber pad and 261-third through hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 2, the present invention provides a gear shifting block structure 100, including a block body 10 and a damping assembly 20, wherein the block body 10 has a mounting hole 11 and a pin hole 12, and a center line of the pin hole 12 is perpendicular to and intersects with a center line of the mounting hole 11; the shock absorption assembly 20 comprises an outer tube 21, an inner tube 22 and elastic brackets 23, the outer tube 21 is fixedly connected with the shifting block body 10 and is positioned in the mounting hole 11, the outer tube 21 is overlapped with the center line of the mounting hole 11, the outer tube 21 is provided with a first through hole 211, the first through hole is overlapped with the center line of the pin hole 12, the inner tube 22 is positioned in the outer tube 21, the center line of the inner tube 22 is overlapped with the center line of the outer tube 21, the inner tube 22 is provided with a second through hole 221 and a concave-convex surface 222, the center line of the second through hole 221 is overlapped with the center line of the first through hole 211, the concave-convex surface 222 is positioned on the inner peripheral side of the inner tube 22, the number of the elastic brackets 23 is multiple, the multiple elastic brackets 23 are abutted between the outer tube 21 and the inner tube 22 and are uniformly distributed along the inner tube 22, the elastic support 23 is a bent plate-shaped structure. Referring to fig. 3, it can be understood that, in the prior art, a general old-style shifting block 30 is an integrally formed structure, and when the shifting block is shifted by the shifting block, the shifting block and the shifting fork shaft can rub and collide with each other, which generates harsh noise and easily damages the shifting fork shaft.

In this embodiment, when in use, an installer inserts a shift fork shaft into the mounting hole 11, and then inserts a plug pin into the pin hole 12, the first through hole 211, the second through hole 221, and the insertion hole formed on the shift fork shaft to achieve tight connection between the shift block body 10, the damping assembly 20, and the shift fork shaft, wherein an outer side wall of the shift fork shaft is tightly attached to an inner circumferential side of the inner tube 22 of the damping assembly 20, and the inner circumferential side is the concave-convex surface 222, so that a friction coefficient between the inner tube 22 and the shift fork shaft is increased, thereby preventing a large gap from being formed between the shift fork shaft and the shift block structure 100, and in use, the shift fork shaft is displaced relative to the shift block structure 100, which causes collision and mutual friction between the inner tube 22 and the shift fork shaft, thereby generating noise; on the other hand, since the elastic support 23 abuts against the outer tube 21 and the inner tube 22, and the elastic support 23 is a bent plate-shaped structure, when the shifting block body 10 is shifted by the shifting block, the vibration on the shift fork shaft is transmitted to the elastic support 23 through the inner tube 22, and the elastic support 23 can play a role in damping and adapting to the vibration and displacement from the shift fork shaft, so as to buffer the vibration between the shift block body 10 and the shift fork shaft, and achieve a very good damping effect. The shifting block structure 100 and the shifting fork shaft are isolated and damped through the damping component 20, and collision cannot occur, so that harsh noise cannot be generated, the shifting block body 10 and the shifting fork shaft cannot be damaged, and the service lives of the shifting block body 10 and the shifting fork shaft can be prolonged; in addition, the shock-absorbing assembly 20 uses the combination of the outer tube 21, the inner tube 22 and the plurality of elastic brackets 23, so that the installation is more convenient, the structure is simple, the precision is high, the load is large, and the manufacturing cost is low. Preferably, the outer tube 21, the inner tube 22 and the elastic support 23 are made of QBe2 beryllium bronze, which has high strength, hardness, elasticity, wear resistance, fatigue limit and heat resistance after quenching and tempering; meanwhile, the material also has high electrical conductivity, thermal conductivity and cold resistance, is non-magnetic, has no spark when being collided, and is easy to weld and solder.

Further, the cross section of the elastic support 23 is S-shaped.

In the present embodiment, since the cross section of the elastic support 23 is S-shaped, the elastic support 23 has a hyperboloid surface, is not easily broken, and has a larger expansion amount and a better damping effect.

Further, the outer tube 21, the inner tube 22 and the elastic support 23 are integrally formed.

In the present embodiment, since the outer tube 21, the inner tube 22 and the elastic bracket 23 are integrally formed, the shock absorbing assembly 20 is easier to process and install, the processing cost is lower, and the connection strength between the outer tube 21 and the elastic bracket 23 and between the inner tube 22 and the elastic bracket 23 is greater; on the other hand, the integrally formed structure of the outer tube 21, the inner tube 22 and the elastic part 23 is more stable, so that the vibration between the outer tube 21 and the elastic part can be reduced, and the noise reduction effect is better.

Further, the shifting block body 10 is further provided with a presynchronization boss 13, and the presynchronization boss 13 is located on the peripheral side of the shifting block body 10.

In the embodiment, the pre-synchronization boss 13 drives the shifting fork shaft which is tightly connected with the pre-synchronization boss to move axially, so that the shifting fork is driven to push the gear sleeve, the gear borrowing is realized, the reverse gear hitting phenomenon in the reverse gear engaging process can be effectively reduced, the service life of the gear can be effectively prolonged, and the reliability of a vehicle can be improved. In addition, because the tooth beating phenomenon is reduced, the noise generated by tooth beating is correspondingly reduced, and the pre-synchronization table also plays a role in noise reduction.

Further, the dial body 10 further has a silencing groove 14, and the silencing groove 14 is located on the periphery of the dial body 10.

In this embodiment, after the shift block structure 100 is shifted by the reverse gear pre-synchronizing shift block, the shift block needs to return to the initial position, the silencing groove 14 effectively prevents interference during the shifting process, avoids noise generated by collision between the shift block structure 100 and the reverse gear pre-synchronizing shift block, and effectively reduces the self weight while ensuring the strength and function of the shift block body 10.

Further, the damping assembly 20 further includes a plurality of damping springs 24, and the plurality of damping springs 24 are abutted between the outer tube 21 and the inner tube 22, and are distributed along the circumferential side of the inner tube 22 and staggered with the elastic support 23.

In this embodiment, the damping spring 24 is arranged to further buffer the vibration between the shift block structure 100 and the shift fork shaft when the shift block structure 100 is shifted by the shift block, so as to further increase the damping and noise reduction effects.

Further, the shock absorbing assembly 20 further comprises a sound absorbing layer 25, the sound absorbing layer 25 is filled between the inner tube 22 and the outer tube 21, and the sound absorbing layer 25 is made of polyurethane foam.

In the present embodiment, the sound absorbing layer 25 is provided to further increase the noise reduction effect, and since the sound absorbing layer 25 is made of a polyurethane foam, the amount of compression deformation of the polyurethane foam is large, and therefore, the operation of the elastic member is not affected. The polyurethane foaming body has numerous small holes, noise enters from the small holes and is transversely and directly impacted in the foaming body, and in the process, the energy of the noise is consumed, and the sound insulation effect is good.

Further, the shock absorbing assembly 20 further includes a rubber pad 26, the rubber pad 26 is fixedly connected to the inner tube 22 and surrounds an inner peripheral side of the rubber pad 26, the rubber pad 26 has a third through hole 261, and the third through hole 261 overlaps a center line of the second through hole 221.

In this embodiment, the rubber pad 26 can further increase the friction coefficient between the shift block structure 100 and the shift fork shaft, so as to prevent the relative displacement from generating noise, and the rubber pad 26 can also play a role in buffering the vibration between part of the shift block structure 100 and the shift fork shaft.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A gear shifting block structure, which is characterized in that,

the shifting block comprises a shifting block body and a damping component, wherein the shifting block body is provided with a mounting hole and a pin hole, and the center line of the pin hole is perpendicular to and intersected with the center line of the mounting hole;

the shock absorption assembly comprises an outer pipe body, an inner pipe body and an elastic support, the outer pipe body is fixedly connected with the shifting block body, and is positioned in the mounting hole, the outer tube body is overlapped with the central line of the mounting hole, the outer tube body is provided with a first through hole, the first passage overlapping a centerline of the pin hole, the inner tube being located within the outer tube, and the central line of the inner tube body is overlapped with the central line of the outer tube body, the inner tube body is provided with a second through hole and a concave-convex surface, the center line of the second through hole is overlapped with the center line of the first through hole, the concave-convex surface is positioned on the inner peripheral side of the inner tube body, the number of the elastic supports is a plurality, the elastic supports are propped between the outer pipe body and the inner pipe body, and the elastic support is of a bent plate-shaped structure and is uniformly distributed along the peripheral side of the inner tube body.

2. The shift block structure of claim 1, wherein the cross-section of the resilient bracket is S-shaped.

3. The shift block structure of claim 2, wherein the outer tube, the inner tube and the resilient bracket are integrally formed.

4. The shift block structure of claim 1, wherein the block body further has a pre-synchronization boss located on a circumferential side of the block body.

5. The shift block structure of claim 4, wherein the block body further has a silencing groove located on a peripheral side of the block body.

6. The shift paddle structure of claim 3, wherein the damping assembly further comprises a plurality of damping springs, and the plurality of damping springs are supported between the outer body and the inner body and are staggered with the elastic bracket along the circumferential side of the inner body.

7. The shift block structure according to claim 6, wherein the shock absorbing assembly further comprises a sound absorbing layer filled between the inner pipe body and the outer pipe body, the sound absorbing layer being made of polyurethane foam.

8. The shift paddle structure of claim 7, wherein the damper assembly further comprises a rubber pad fixedly coupled to the inner tube and surrounding an inner peripheral side of the rubber pad, the rubber pad having a third through hole overlapping a center line of the second through hole.