CN213361057U

CN213361057U - Gear shifting cam of gearbox

Info

Publication number: CN213361057U
Application number: CN202021442785.5U
Authority: CN
Inventors: 崔建业
Original assignee: NINGBO TIANYE PRECISION CASTING CO Ltd
Current assignee: NINGBO TIANYE PRECISION CASTING CO Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-06-04
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a gear shifting cam of a gearbox, which comprises a cam and a gear shifting shaft, wherein the cam is used for shifting gears, a rolling body is arranged in the cam, the cam is matched with the gear shifting shaft through the rolling body, the cam is matched with one end of a connecting mechanism, and the other end of the connecting mechanism is connected with a shifting fork group; the utility model has the advantages that: the cam and the shifting fork group are connected through the connecting mechanism, so that complex structures such as a shifting block and the like are omitted, the assembly difficulty and the production cost are reduced, and the production benefit is improved; through the depth difference of the gear shifting groove and the gear shifting sliding groove on the cam, certain spacing is guaranteed to be achieved after gear shifting, the occurrence of the gear jumping condition is greatly reduced, the driving safety of an automobile is improved, and meanwhile, the cam is matched with the gear shifting shaft through the rolling body, so that the gear shifting is guaranteed to be easier and more labor-saving.

Description

Gear shifting cam of gearbox

Technical Field

The utility model relates to the field of automobiles, especially, relate to a gearbox cam of shifting.

Background

With the improvement of living standard, automobiles become more and more travel tools for people, an automobile transmission gear selecting and shifting device is one of important parts of a manual transmission automobile, and people also put forward higher and further requirements on the gear selecting and shifting performance of the automobile transmission gear selecting and shifting device; the existing automobile gear shifting mechanism is complex in structure, high in production and manufacturing cost, not suitable for simple and small gearboxes, and no limiting mechanism is arranged after gear shifting, so that the phenomenon of gear jumping occurs in the automobile driving process, and the driving safety of the automobile is seriously influenced.

Disclosure of Invention

The utility model discloses to the condition among the background art, provide a gearbox cam of shifting, solved the complicated and no problem of location of shifting of gearshift.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve: the utility model provides a gearbox cam of shifting, is including the cam and the selector shaft that are used for shifting, the inside a plurality of rolling elements that are equipped with of cam, the cam passes through the rolling element with the selector shaft cooperation, cam and coupling mechanism one end cooperation, the coupling mechanism other end is connected with the shift fork group.

Preferably, the gear shifting shaft is provided with a plurality of sliding chutes, the cam is internally provided with a plurality of clamping grooves, the clamping grooves are internally provided with the rolling bodies, and the rolling bodies are matched with the sliding chutes.

Preferably, the connecting mechanism is composed of a sliding pin shaft and a connecting rod, a limiting groove is formed in one end of the connecting rod, the sliding pin shaft is matched with the limiting groove, a spring is further installed inside the limiting groove, one end of the spring is connected with the sliding pin shaft, and the other end of the spring is connected with the bottom of the limiting groove.

Preferably, the cam lower extreme is equipped with the spout of shifting, the spout both ends of shifting are equipped with the empty spout in a left side and the empty spout in the right side respectively, it has the groove of keeping off still to be equipped with the symmetry on the spout of shifting, the spout intermediate position of shifting still symmetry is equipped with the groove of shifting left side and the groove of shifting right side, the spout of shifting left side empty spout the empty spout in the right side the groove of keeping off, the groove of shifting left side shift the groove with the groove of shifting right side all can with the cooperation of sliding pin axle.

Preferably, the depth of the shift gate is greater than the diameter of the rolling elements.

Preferably, the depth of the left empty chute and the depth of the right empty chute are greater than the depth of the gear shifting chute.

Preferably, the depth of the idle gear groove is greater than the depth of the shift gate.

Preferably, the depth of the left shift groove and the right shift groove is greater than the depth of the shift gate.

Preferably, the shift fork group comprises a left shift fork and a right shift fork.

The utility model has the advantages that: the cam and the shifting fork group are connected through the connecting mechanism, so that complex structures such as a shifting block and the like are omitted, the assembly difficulty and the production cost are reduced, and the production benefit is improved; through the depth difference of the gear shifting groove and the gear shifting sliding groove on the cam, certain spacing is guaranteed to be achieved after gear shifting, the occurrence of the gear jumping condition is greatly reduced, the driving safety of an automobile is improved, and meanwhile, the cam is matched with the gear shifting shaft through the rolling body, so that the gear shifting is guaranteed to be easier and more labor-saving.

Drawings

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

Fig. 2 is a front sectional view of the present invention.

Fig. 3 is a sectional view taken along the direction a of the present invention.

Fig. 4 is a sectional view in the direction B of the present invention.

Fig. 5 is a sectional view in the direction of C of the present invention.

Fig. 6 and 7 are front view direction sectional views of the gear shifting state of the present invention.

In the figure: the gear shifting mechanism comprises a gear shifting shaft 101, a sliding chute 102, a cam 201, a gear shifting sliding chute 202, a left idle sliding chute 203, an idle gear groove 204, a left gear shifting groove 205, a right gear shifting groove 206, a right idle sliding chute 207, a clamping groove 208, a left shifting fork 301, a right shifting fork 302, a sliding pin shaft 303, a connecting rod 304, a limiting groove 305, a spring 4 and a rolling body 5.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in the present disclosure, all other embodiments obtained by a person skilled in the art without creative efforts are within the scope of the present disclosure.

As shown in fig. 1 to 7, a gear shifting cam of a transmission comprises a cam 201 for shifting gears and a gear shifting shaft 101, wherein a plurality of rolling bodies 5 are arranged inside the cam 201, the cam 201 is matched with the gear shifting shaft 101 through the rolling bodies 5, the cam 201 is matched with one end of a connecting mechanism, and the other end of the connecting mechanism is connected with a shifting fork group.

The gear shifting shaft 101 is provided with a plurality of sliding grooves 102, the cam 201 is internally provided with a plurality of clamping grooves 208, the clamping grooves 208 are internally provided with the rolling bodies 5, the rolling bodies 5 are matched with the sliding grooves 102, the cam 201 can slide along the sliding grooves 102, and meanwhile, when the cam 201 rotates, the gear shifting shaft 101 can be driven to rotate.

The connecting mechanism is composed of a sliding pin shaft 303 and a connecting rod 304, wherein one end of the connecting rod 304 is provided with a limiting groove 305, the sliding pin shaft 303 is matched with the limiting groove 305, a spring 4 is further installed inside the limiting groove 305, one end of the spring 4 is connected with the sliding pin shaft 303, and the other end of the spring is connected with the bottom of the limiting groove 305.

The lower end of the cam 201 is provided with a gear shifting chute 202, two ends of the gear shifting chute 202 are respectively provided with a left empty chute 203 and a right empty chute 207, the gear shifting chute 202 is further symmetrically provided with a hollow chute 204, the middle position of the gear shifting chute 202 is further symmetrically provided with a left gear shifting groove 205 and a right gear shifting groove 206, the gear shifting chute 202, the left empty chute 203, the right empty chute 207, the hollow chute 204, the left gear shifting groove 205 and the right gear shifting groove 206 can be matched with the sliding pin shaft 303, the matching part of the sliding pin shaft 303 is hemispherical, the diameter of the matching part is the same as the diameter of the rolling element 5, the depth of the gear shifting chute 202 is larger than the diameter of the rolling element 5, the sliding pin shaft 303 is ensured to be limited when sliding in the gear shifting chute 202 and only can slide along the gear shifting chute 202, and the depths of the left empty chute 203 and the right empty chute 207 are larger than the depth, the depth of the idle gear groove 204 is greater than that of the gear shifting sliding groove 202, the depth of the left gear shifting groove 205 and the depth of the right gear shifting groove 206 are greater than that of the gear shifting sliding groove 202, so that a shifting fork group and the cam 201 have certain limiting capacity when gears are shifted, and the gear jumping risk is reduced.

The fork group includes a left fork 301 and a right fork 302.

The specific working process is as follows: in the neutral state, the shifting fork group is matched with the neutral groove on the cam through the connecting rod mechanism as shown in figure 1 and figure 2, when the gear needs to be shifted leftwards, the cam slides in the sliding groove through the rolling body under the action of external force, the hollow blocking groove on the cam is separated from the sliding pin shaft on the connecting rod mechanism at the moment, and the spring in the connecting rod mechanism is compressed, when the cam moves to the left limit position, the sliding pin shaft on the left shifting fork is matched with the left gear shifting groove, the sliding pin shaft on the right shifting fork is matched with the right hollow chute as shown in figure 6, then the cam starts to rotate, in the rotating process, the left shifting fork in the left gear shifting groove realizes the translation along a shifting fork shaft (not shown) through the rotation of the cam, meanwhile, a spring in the connecting rod structure can reset along with the rotation of the cam, so that the sliding pin shaft is ensured to be always contacted with the left shifting groove, the shifting is further realized, and meanwhile, the right shifting fork relatively slides in the right hollow sliding groove, and does not generate translation; the process of shifting to the right as shown in fig. 7 is the same principle as the process of shifting to the left and will not be explained.

Claims

1. Gearbox shift cam comprising a cam (201) for shifting gears and a shift shaft (101), characterized in that: the gear shifting mechanism is characterized in that a plurality of rolling bodies (5) are arranged in the cam (201), the cam (201) is matched with the gear shifting shaft (101) through the rolling bodies (5), the cam (201) is matched with one end of a connecting mechanism, the other end of the connecting mechanism is connected with a shifting fork group, the connecting mechanism is composed of a sliding pin shaft (303) and a connecting rod (304), one end of the connecting rod (304) is provided with a limiting groove (305), the sliding pin shaft (303) is matched with the limiting groove (305), a spring (4) is further arranged in the limiting groove (305), one end of the spring (4) is connected with the sliding pin shaft (303), the other end of the spring is connected with the bottom of the limiting groove (305), a gear shifting chute (202) is arranged at the lower end of the cam (201), a left empty chute (203) and a right empty chute (207) are respectively arranged at the two ends of the gear shifting chute (202), and empty gear, the gear shifting device is characterized in that a left gear shifting groove (205) and a right gear shifting groove (206) are symmetrically arranged in the middle of the gear shifting sliding groove (202), the left empty sliding groove (203), the right empty sliding groove (207), the empty gear shifting groove (204), the left gear shifting groove (205) and the right gear shifting groove (206) can be matched with the sliding pin shaft (303).

2. A transmission shift cam according to claim 1 wherein: the gear shifting mechanism is characterized in that a plurality of sliding grooves (102) are formed in the gear shifting shaft (101), a plurality of clamping grooves (208) are formed in the cam (201), the rolling bodies (5) are installed in the clamping grooves (208), and the rolling bodies (5) are matched with the sliding grooves (102).

3. A transmission shift cam according to claim 1 wherein: the depth of the left empty chute (203) and the right empty chute (207) is greater than the depth of the shift chute (202).

4. A transmission shift cam according to claim 1 wherein: the depth of the neutral groove (204) is greater than the depth of the shift gate (202).

5. A transmission shift cam according to claim 1 wherein: the depth of the left shift groove (205) and the right shift groove (206) is greater than the depth of the shift gate (202).

6. A transmission shift cam according to claim 1 wherein: the shifting fork group comprises a left shifting fork (301) and a right shifting fork (302).