A gear shifting mechanism and agricultural machinery

Abstract

This utility model proposes a gear shifting mechanism and agricultural machinery. The gear shifting mechanism includes a transfer case housing, within which are an input shaft and an output shaft arranged parallel to each other. The input shaft has fixed input teeth, and the output shaft has slidable sliding teeth. The transfer case housing also includes a rotatable shaft, one end of which has a rotatable shift head positioned on one side of the sliding teeth. When the shaft rotates, the shift head moves the sliding teeth on the output shaft. This gear shifting mechanism, by using a shift head at one end of the shaft, moves the sliding teeth during gear shifting. This arrangement changes the contact between the shift head and the sliding teeth from a traditional point or line contact to a surface contact, resulting in smoother gear shifting and a longer service life. Furthermore, it has the advantages of simple structure and high practicality.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a gear shifting mechanism and agricultural machinery. Background Technology

[0002] In recent years, with the continuous development of agricultural technology, agricultural machinery of various structures, such as tractors, has been increasingly widely used in agricultural production activities.

[0003] During the operation of agricultural machinery such as tractors, different operating speeds are required. Therefore, a shifting mechanism is needed to switch the output speed of the gearbox. Currently used shifting mechanisms typically include several shift forks. During shifting, the shift forks disengage the sliding gear and move left and right along the corresponding axis to achieve different gear outputs. However, during shifting, because the shift forks can only hold against one end of the sliding gear, uneven movement of the sliding gear can easily occur, leading to unstable shifting operations and a short service life of the shifting mechanism.

[0004] In summary, how to provide a gear shifting mechanism with a simple structure, smooth shifting operation, and longer service life, as well as agricultural machinery including this gear shifting mechanism, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gear shifting mechanism with simple structure, smooth shifting operation and longer service life, as well as agricultural machinery including this gear shifting mechanism.

[0006] The solution of this utility model is implemented as follows: This utility model proposes a gear shifting mechanism for agricultural machinery, including a transfer case housing. The transfer case housing contains an input shaft and an output shaft, which are arranged in parallel. The input shaft has a fixed input tooth, and the output shaft has a slidable sliding tooth. The transfer case housing also has a rotatable shaft, one end of which has a rotatable shift head. The shift head is located on one side of the sliding tooth. When the shaft rotates, the shift head can drive the sliding tooth to move on the output shaft. This gear shifting mechanism, by setting a shift head at one end of the shaft, moves the sliding tooth by shifting gears. This arrangement changes the contact between the shift head and the sliding tooth from the traditional point or line contact to a surface contact, thus making gear shifting smoother and extending the service life of the gear shifting mechanism. Furthermore, it has the advantages of simple structure and high practicality.

[0007] Another technical solution of this utility model is that, based on the above, the shifting mechanism further includes a connecting part, one end of which is fixedly connected to the rotating shaft, and the shift head is rotatably disposed at the other end of the connecting part.

[0008] Another technical solution of this utility model is that, based on the above, the connecting part is provided with a mounting hole at one end near the dial head, and one end of the dial head is disposed in the mounting hole.

[0009] Another technical solution of this utility model is that, based on the above, the shifting mechanism further includes a control lever, which is connected to one end of the rotating shaft away from the connecting part. When the control lever is operated, the rotating shaft can be driven to rotate on the transfer case.

[0010] Another technical solution of this utility model is that, based on the above, the transfer case is further provided with two opposing first bearings, and the two ends of the input shaft are rotatably mounted on the two first bearings respectively; the transfer case is also provided with an end cover, and the end cover is detachably fixed to one end of the input shaft.

[0011] Another technical solution of this utility model is that, based on the above, the transfer case is further provided with two opposing second bearings, and the output shaft is rotatably mounted on the two second bearings.

[0012] Another technical solution of this utility model is that, based on the above, the shifting mechanism further includes a plurality of first oil seals and oil seal covers, the oil seal covers are sleeved on the output shaft and are detachably fixedly connected to the transfer case, and the plurality of first oil seals are disposed between the oil seal covers and the second bearing.

[0013] Another technical solution of this utility model is that, based on the above, the output shaft is further provided with a through hole, a positioning spring is provided in the through hole, and steel balls that play a positioning role are respectively provided at both ends of the positioning spring.

[0014] Another technical solution of this utility model is that, based on the above, a positioning hole is also provided on the surface of the sliding tooth that mates with the output shaft, and part of the steel ball can be placed in the positioning hole.

[0015] On the other hand, this utility model also proposes an agricultural machine, including a gear shifting mechanism, which is the gear shifting mechanism described above. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram of the structure of a gear shifting mechanism according to the present invention;

[0018] Figure 2 for Figure 1 A left-side view diagram.

[0019] The correspondence between the attached figures is as follows:

[0020] 1. Transfer case 2. Input shaft 3. First bearing

[0021] 4. End cap; 5. First oil seal; 6. Output shaft

[0022] 7. Oil seal cap; 8. Sliding tooth; 9. Control lever

[0023] 10 Second oil seal 11 Sealing ring 12 Connecting part

[0024] 13. Dial head; 14. Steel ball; 15. Positioning spring

[0025] 16 Input gear 17 Shaft 18 Second bearing

[0026] 19 positioning holes Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings. This description is merely illustrative and explanatory, and should not be construed as limiting the scope of protection of the present invention. Furthermore, those skilled in the art can combine the features in the embodiments described herein and in different embodiments according to the description in this document.

[0028] The embodiments of this utility model are as follows, please refer to them. Figure 1 and Figure 2 The shifting mechanism shown is used in agricultural machinery. Specifically, it includes a transfer case 1, within which an input shaft 2 and an output shaft 6 are respectively housed, arranged in parallel. The input shaft 2 has a fixed input tooth 16, and the output shaft 6 has a sliding tooth 8 that can slide left and right on the input shaft 2. The transfer case 1 also has a rotatable shaft 17, one end of which... Figure 1 The left end shown is provided with a rotatable dial 13, which is specifically located on one side of the sliding teeth 8. Figure 2 As shown on the left, when the rotating shaft 17 rotates, the sliding teeth 8 can be moved on the output shaft 6 by the shift head 13. This shifting mechanism, by setting the shift head 13 at one end of the rotating shaft 17, moves the sliding teeth 8 by shifting gears. This arrangement changes the contact between the shift head 13 and the sliding teeth 8 from the traditional point or line contact to surface contact, thus making the shifting operation smoother and extending the service life of the shifting mechanism. Furthermore, it has the advantages of simple structure and high practicality.

[0029] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, the shifting mechanism also includes a connecting part 12. One end of the connecting part 12, i.e., the upper end shown in the figure, is fixedly connected to the left end of the rotating shaft 17. The shift head 13 is rotatably disposed at the other end of the connecting part 12, i.e., the lower end shown in the figure. When the rotating shaft 17 rotates, it drives the connecting part 12 to rotate together. It should be noted that the connecting part 12 and the rotating shaft 17 can be a fixed connection or an integral structure.

[0030] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the connecting part 12 has a mounting hole at one end near the dial head 13, i.e., the lower end shown in the figure. One end of the dial head 13, i.e., the right end shown in the figure, is set in the mounting hole, and the dial head 13 and the mounting hole are fitted with a clearance fit, i.e., the dial head 13 can rotate in the mounting hole.

[0031] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the shifting mechanism also includes a control lever 9, which is located away from the end of the rotating shaft 17 opposite to the connecting part 12. Figure 1 The right end connection shown can drive the rotating shaft 17 to rotate a certain extent on the transfer case 1 when the control lever 9 is operated.

[0032] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2 As shown, the transfer case 1 also contains two opposing first bearings 3. The left and right ends of the input shaft 2 are respectively mounted on the two first bearings 3 and can rotate within them. Furthermore, the transfer case 1 is also equipped with an end cover 4, which is detachably fixed to one end of the input shaft 2. Figure 2 Specifically, the end cap 4 can be fixed to the transfer case 1 by several connectors on the right end shown.

[0033] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2 As shown, the transfer case 1 is also equipped with two opposing second bearings 18. The two ends of the output shaft 6 are respectively mounted on the two second bearings 18 and can rotate on the second bearings 18. It should be noted that both the first bearing 3 and the second bearing 18 are preferably ball bearings.

[0034] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2As shown, the shifting mechanism also includes several first oil seals 5 and oil seal covers 7. The oil seal cover 7 is specifically fitted onto the output shaft 6, specifically located at the right end of the output shaft 6, and is detachably fixedly connected to the transfer case 1. Several first oil seals 5 are disposed between the oil seal cover 7 and the second bearing 18. It should be noted that the first oil seals 5 are preferably large-frame oil seals, and the number of them is preferably two. In addition, several second oil seals 10 are also provided at the connection between the control lever 9 and the rotating shaft 17. The second oil seals 10 are preferably small-frame oil seals, and the number of both the first oil seals 5 and the second oil seals 10 is preferably two. Furthermore, several sealing rings 11 that serve a sealing function are also provided on the surface where the rotating shaft 17 mates with the transfer case 1. The sealing rings 11 are fitted onto the rotating shaft, and the sealing rings 11 are preferably O-rings.

[0035] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2 As shown, the output shaft 6 is also provided with a through hole (not shown in the figure), and a positioning spring 15 is provided in the through hole. The two ends of the positioning spring 15 are respectively provided with steel balls 14 for positioning.

[0036] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2 As shown, a positioning hole 19 is also provided on the surface where the sliding tooth 8 mates with the output shaft 6. Part of the steel ball 14 can be placed in the positioning hole 19. At this time, the sliding tooth 8 is fixed on the output shaft 6.

[0037] The shifting mechanism of this structure has a shift head 13 set at one end of the rotating shaft 17. When shifting gears, the shift head 13 moves the sliding teeth 8. This setting changes the contact between the shift head 13 and the sliding teeth 8 from the traditional point or line contact to surface contact. Therefore, the shifting operation is smoother and the service life of the shifting mechanism is longer. In addition, it also has the advantages of simple structure and strong practicality.

[0038] On the other hand, this utility model also proposes an agricultural machine, including a gear shifting mechanism, which is the gear shifting mechanism described above.

[0039] Agricultural machinery with this structure, correspondingly, possesses the advantages of the aforementioned gear shifting mechanism.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gear shifting mechanism for use in agricultural machinery, characterized in that, The device includes a transfer case housing, which contains an input shaft and an output shaft arranged in parallel. The input shaft has fixed input teeth, and the output shaft has slidable sliding teeth. The transfer housing is also provided with a rotatable shaft, one end of which is provided with a rotatable dial. The dial is located on one side of the sliding tooth. When the shaft rotates, the dial can drive the sliding tooth to move on the output shaft.

2. The shifting mechanism according to claim 1, characterized in that, The shifting mechanism also includes a connecting part, one end of which is fixedly connected to the rotating shaft, and the shift head is rotatably disposed at the other end of the connecting part.

3. The shifting mechanism according to claim 2, characterized in that, The connecting part has a mounting hole at one end near the dial head, and one end of the dial head is disposed in the mounting hole.

4. The shifting mechanism according to claim 3, characterized in that, The shifting mechanism also includes a control lever, which is connected to the end of the rotating shaft opposite to the connecting part. When the control lever is operated, the rotating shaft can be driven to rotate on the transfer case.

5. The shifting mechanism according to claim 4, characterized in that, The transfer case is also provided with two opposing first bearings, and the two ends of the input shaft are rotatably mounted on the two first bearings respectively; The transfer housing is also provided with an end cover, which is detachably fixed to one end of the input shaft.

6. The shifting mechanism according to claim 5, characterized in that, The transfer case is also equipped with two opposing second bearings, and the output shaft is rotatably mounted on the two second bearings.

7. The shifting mechanism according to claim 6, characterized in that, The shifting mechanism also includes several first oil seals and oil seal covers. The oil seal covers are sleeved on the output shaft and are detachably fixedly connected to the transfer case. Several first oil seals are disposed between the oil seal cover and the second bearing.

8. The shifting mechanism according to claim 7, characterized in that, The output shaft is also provided with a through hole, and a positioning spring is provided in the through hole. The two ends of the positioning spring are respectively provided with steel balls that play a positioning role.

9. The shifting mechanism according to claim 8, characterized in that, The sliding tooth is provided with a positioning hole on the surface that mates with the output shaft, and part of the steel ball can be placed in the positioning hole.

10. An agricultural machine, comprising a gear shifting mechanism, characterized in that, The shifting mechanism is the shifting mechanism according to any one of claims 1 to 9.

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