CN216589896U

CN216589896U - Gearshift and agricultural machine

Info

Publication number: CN216589896U
Application number: CN202122325049.2U
Authority: CN
Inventors: 陈震霖; 李靖; 周志
Original assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Current assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-05-24
Anticipated expiration: 2031-09-24

Abstract

The utility model provides a gear shifting mechanism which is used on agricultural machinery and comprises a gearbox body and a shell fixedly arranged at one end of the gearbox body, wherein a piston is arranged in the shell, a movable shifting fork shaft is arranged in the gearbox body, one end of the shifting fork shaft is fixedly connected with the piston and can drive the piston to move in the shell; the gearbox body is further provided with a positioning device, and the positioning device is used for fixing the shifting fork shaft at a preset position. The shifting mechanism with the structure fixes the shifting fork shaft through the piston in the shell. On the other hand, the shifting fork shaft is fixed through the positioning device. Compared with the gear shifting mechanism with the prior structure, the double-positioning gear shifting mechanism has the advantages of high positioning precision, difficult gear jumping, good stability, good safety and the like. In addition, the utility model also provides an agricultural machine comprising the gear shifting mechanism.

Description

Gearshift and agricultural machine

Technical Field

The utility model relates to the field of agricultural machinery, in particular to a gear shifting mechanism and agricultural machinery.

Background

In recent years, with the continuous forward development of science and technology and economy, various agricultural machines such as tractors and the like are widely applied to the production and life of the broad agriculture.

The gear shifting mechanism is used for shifting gears for agricultural machinery, the gear shifting mechanism with the existing structure is mainly carried out through structures such as a shifting fork and a shifting fork shaft, but the problems of insufficient precision in positioning, poor stability, easiness in gear jumping and the like generally exist, and great safety risks are brought to the driving of the agricultural machinery.

Therefore, how to provide a gear shifting mechanism with high positioning accuracy, difficult gear jumping, good stability and good safety and an agricultural machine comprising the gear shifting mechanism becomes a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the gear shifting mechanism is high in position precision, not prone to gear jumping, good in stability and good in safety, and the agricultural machine comprising the gear shifting mechanism is provided.

The solution of the utility model is realized by the following steps: the utility model provides a gear shifting mechanism which is used for agricultural machinery and comprises a gearbox body and a shell fixedly arranged at one end of the gearbox body, wherein a piston is arranged in the shell, a movable shifting fork shaft is arranged in the gearbox body, one end of the shifting fork shaft is fixedly connected with the piston and can drive the piston to move in the shell; the gearbox body is further provided with a positioning device, and the positioning device is used for fixing the shifting fork shaft at a preset position. The shifting mechanism with the structure fixes the shifting fork shaft through the piston in the shell. On the other hand, the shifting fork shaft is fixed through the positioning device. Compared with the gear shifting mechanism with the prior structure, the double-positioning gear shifting mechanism has the advantages of high positioning precision, difficult gear jumping, good stability, good safety and the like.

On the basis, the shell is provided with a first air hole and a second air hole, the piston divides the shell into a rod cavity and a rodless cavity, the first air hole is communicated with the rodless cavity, and the second air hole is communicated with the rod cavity.

On the basis, the piston is provided with a plurality of sealing grooves, and a sealing ring is respectively arranged in each sealing groove.

On the basis, one end of the gearbox body, which is close to the shell, is also provided with a positioning block for positioning the shifting fork shaft, a positioning hole is formed in the positioning block, and the shifting fork shaft is arranged in the positioning hole.

Another technical solution of the present invention is that on the basis of the above, a plurality of sealing rings are respectively disposed between the fork shaft and the positioning hole, and between the positioning block and the transmission case.

On the basis, the other technical scheme is that the positioning device comprises a spring arranged in the gearbox body and a steel ball arranged at one end of the spring.

The other technical scheme of the utility model is that on the basis, the shifting fork shaft is also provided with a plurality of positioning grooves, and when the steel balls are arranged in the positioning grooves, the shifting fork shaft is fixed.

On the basis, the other technical scheme of the utility model is that the positioning device further comprises a first bolt arranged on the gearbox body, one end of the spring is abutted against one end of the first bolt, and the steel ball is arranged at the other end of the spring.

On the basis, the shifting fork shaft is further provided with a shifting fork, and the shifting fork is further provided with a second bolt for fixing the shifting fork on the shifting fork shaft.

In addition, the utility model also provides an agricultural machine, which comprises the gear shifting mechanism.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

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

The corresponding relation of the reference signs is as follows:

1 shell 2 declutch shift shaft 3 locating block

4 gearbox casing 41 chute

5 shifting fork 6 first bolt 7 steel ball

8 spring 9 nut 10 second bolt

11 first seal ring 12 rodless cavity 13 rod cavity

14 second seal 15 third seal 16 fourth seal

17 first positioning groove 18 second positioning groove 19 piston

101 first air hole 102 second air hole

Detailed Description

The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.

The embodiment of the utility model is as follows, please refer to the gear shifting mechanism shown in fig. 1, which is used for agricultural machinery and comprises a gear box body 4 and a shell 1 fixedly arranged at one end of the gear box body 4, namely the left end shown in the figure, a piston 19 capable of moving left and right is arranged in the shell 1, a movable shifting fork shaft 2 is arranged in the gear box body 4, one end of the shifting fork shaft 2, namely the left end shown in the figure, is fixedly connected with the piston 19, and the piston 19 can be driven to move left and right in the shell 1. The gearbox housing 4 is further provided with a positioning device which is used for fixing the declutch shift shaft 2 at a preset position. In the shift mechanism of this configuration, the fork shaft 2 is fixed by the piston 19 in the housing 1. On the other hand, the shifting fork shaft 2 is fixed through a positioning device. Compared with the gear shifting mechanism with the prior structure, the double-positioning gear shifting mechanism has the advantages of high positioning precision, difficult gear jumping, good stability, good safety and the like.

In another embodiment of the present invention, as shown in fig. 1, a first air hole 101 and a second air hole 102 are provided on the housing 1, the piston 19 divides the interior of the housing 1 into a rod chamber 13 and a rodless chamber 12, the first air hole 101 is communicated with the rodless chamber 12, and the second air hole 102 is communicated with the rod chamber 13. During operation, when the first air hole 101 is filled with air, the piston 19 moves rightwards, and the second air hole 102 is filled with air. When the second air hole 102 is filled with air, the piston 19 moves to the left, and the first air hole 101 is filled with air.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, in order to prevent air leakage and ensure the sealing effect, a plurality of sealing grooves are further disposed on the periphery of the piston 19, and a sealing ring is further disposed in each sealing groove. More specifically, the seal rings include a first seal ring 11, and a second seal ring 14 disposed opposite the first seal ring 11.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a positioning block 3 for positioning the shift fork shaft 2 is further disposed at one end of the transmission case 4 close to the housing 1, i.e., the left end shown in the figure, a positioning hole is disposed in the positioning block 3, and the shift fork shaft 2 is disposed in the positioning hole and can move left and right in the positioning hole.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a plurality of sealing rings are disposed between the periphery of the fork shaft 2 and the positioning hole, and between the positioning block 3 and the transmission case 4. More specifically, the sealing rings include a third sealing ring 15 and a fourth sealing ring 16, the third sealing ring 15 is disposed on the inner wall of the positioning block 3, and the fourth sealing ring 16 is disposed between the positioning block 3 and the transmission case 4.

On the basis of the above embodiment, another embodiment of the present invention, as shown in fig. 1, specifically includes a spring 8 disposed in the transmission case 4, and a steel ball 7 disposed at one end of the spring 8, i.e., the lower end shown in the figure.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a plurality of positioning grooves are further disposed on the fork shaft 2, and when the steel balls 7 are disposed in the positioning grooves, the fork shaft 2 is fixed. More specifically, the positioning groove includes a first positioning groove 17 and a second positioning groove 18 provided on the right side of the first positioning groove 17.

In another embodiment of the present invention, on the basis of the above embodiment, as shown in fig. 1, the positioning device further includes a first bolt 6 disposed on the transmission case 4, and one end, i.e., the upper end shown in the figure, of the spring 8 abuts against one end, i.e., the lower end shown in the figure, of the first bolt 6. In addition, still be equipped with nut 9 on the first bolt 6, nut 9 is used for preventing that first bolt 6 is not hard up, avoids influencing the location effect.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a shift fork 5 is further disposed on the shift fork shaft 2, and a second bolt 10 for fixing the shift fork 5 to the shift fork shaft 2 is further disposed on the shift fork 5.

In addition, the gear shifting mechanism further comprises a sliding groove 41 which is oppositely arranged on the gearbox body 4, and the shifting fork shaft 2 penetrates through the sliding groove 41, so that the shifting fork shaft 2 is ensured to slide back and forth in the gearbox body 4.

In the shift mechanism having the above-described structure, the fork shaft 2 is fixed by the piston 19 in the housing 1, as described above. On the other hand, the shifting fork shaft 2 is fixed through a positioning device. Compared with the gear shifting mechanism with the prior structure, the double-positioning gear shifting mechanism has the advantages of high positioning precision, difficult gear jumping, good stability, good safety and the like.

The agricultural machine with the structure has the advantages of the gear shifting mechanism correspondingly.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A gear shifting mechanism is used for agricultural machinery and is characterized by comprising a gearbox body and a shell fixedly arranged at one end of the gearbox body, wherein a piston is arranged in the shell, a movable shifting fork shaft is arranged in the gearbox body, one end of the shifting fork shaft is fixedly connected with the piston and can drive the piston to move in the shell;

the gearbox body is further provided with a positioning device, and the positioning device is used for fixing the shifting fork shaft at a preset position.

2. The shifter of claim 1 wherein the housing defines a first air port and a second air port, the piston dividing the housing into a rod chamber and a rodless chamber, the first air port communicating with the rodless chamber and the second air port communicating with the rod chamber.

3. The gearshift mechanism of claim 2 wherein said piston has a plurality of seal grooves, each seal groove having a respective seal ring disposed therein.

4. The gearshift mechanism according to claim 3, wherein a positioning block for positioning the shift fork shaft is further disposed at an end of the transmission housing close to the housing, and a positioning hole is disposed in the positioning block, and the shift fork shaft is disposed in the positioning hole.

5. The gearshift mechanism of claim 4 wherein a plurality of sealing rings are disposed between the fork shaft and the positioning hole and between the positioning block and the transmission housing.

6. The gearshift mechanism of claim 5, wherein the positioning device comprises a spring disposed within the transmission housing and a steel ball disposed at one end of the spring.

7. The gearshift mechanism of claim 6, wherein said fork shaft further comprises a plurality of detents, and said ball is retained in said detents.

8. The gearshift mechanism of claim 7, wherein the positioning device further comprises a first bolt disposed on the transmission housing, one end of the spring abuts against one end of the first bolt, and the steel ball is disposed at the other end of the spring.

9. The gearshift mechanism of claim 8, wherein the fork shaft further comprises a fork, and the fork further comprises a second bolt for securing the fork to the fork shaft.

10. An agricultural machine comprising a gear shift mechanism, wherein the gear shift mechanism is a gear shift mechanism according to any one of claims 1 to 9.