Gearbox and tractor

Abstract

The gearbox comprises a box body, a first shaft, a second shaft, a gap bridge shaft, a front drive shaft, a rear drive shaft and a PTO output shaft are arranged in the box body, the PTO output shaft is arranged at one end of the first shaft, and the axis of the first shaft coincides with the axis of the PTO output shaft; a fifth-gear driven tooth, a fourth-gear and fifth-gear tooth holder, a fourth-gear driven tooth, a third-gear driven tooth, a gear shifting synchronizer, a second-gear driven tooth, a first-gear driven tooth, a first-gear reverse gear tooth holder, a reverse gear driven tooth, a low-gear input tooth, a high-low-gear tooth holder and a high-gear input tooth are sequentially arranged on the first shaft. A fourth-gear driving tooth, a third-gear driving tooth, a second-gear driving tooth, a first-gear driving tooth and a high-low-gear duplex tooth are sequentially arranged on the second shaft, and the fourth-gear driving tooth, the third-gear driving tooth, the second-gear driving tooth and the first-gear driven tooth are meshed. The gearbox of the structure has the advantages of being compact in structure, convenient to shift gears, complete in function and higher in additional value of products.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, and in particular to a gearbox and a tractor. Background Technology

[0002] Tractors are one of the most widely used agricultural machines in my country. They can be used as transportation tools or as traction carriers. In recent years, with the continuous development of agricultural technology, tractors of various structures have been used more and more widely in agricultural production activities.

[0003] The gearbox is one of the most important components of a tractor, used to transmit power from the engine to the actuators. It can change the transmission ratio between the output and input shafts in a fixed or progressively increasing manner, and typically consists of a transmission mechanism and a control mechanism. Currently, gearboxes used in tractors generally have disadvantages such as large size and space requirements, relatively difficult shifting, relatively limited functionality, and insufficient added value and competitiveness.

[0004] In summary, how to provide a gearbox that is compact, easy to shift, fully functional, and has higher added value, as well as a tractor that includes this gearbox, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a gearbox with a compact structure, convenient shifting, full functionality and higher added value, as well as a tractor including the gearbox.

[0006] The solution of this invention is implemented as follows: This invention proposes a gearbox for use in a tractor, comprising a housing, within which are arranged a first shaft, a second shaft, an overpass shaft, a front drive shaft, a rear drive shaft, and a PTO output shaft. The first shaft, second shaft, overpass shaft, and front drive shaft are arranged in parallel. The PTO output shaft is located at one end of the first shaft, and the axes of the first shaft and the PTO output shaft coincide. The rear drive shaft is located at one end of the front drive shaft, and the axes of the front drive shaft and the rear drive shaft coincide. The first shaft is sequentially provided with a fifth-gear driven gear, a fourth-gear fifth-gear seat, a fourth-gear driven gear, a third-gear driven gear, a shift synchronizer, a second-gear driven gear, a first-gear driven gear, and a first-gear reverse gear seat. The transmission includes a reverse driven gear, a low-gear input gear, a high / low gear seat, and a high-gear input gear. The two shafts are sequentially equipped with a fourth-gear drive gear, a third-gear drive gear, a second-gear drive gear, a first-gear drive gear, and a high / low gear double-linked gear. The fourth-gear drive gear, third-gear drive gear, second-gear drive gear, and first-gear drive gear can respectively mesh with the fourth-gear drive gear, third-gear drive gear, second-gear drive gear, and first-gear drive gear. The bridge shaft has a movable sliding gear that meshes with the high / low gear double-linked gear. The front drive shaft has a front drive input gear that meshes with the sliding gear. The rear drive shaft has a rear drive input gear that meshes with the sliding gear. Compared to existing transmissions, this structure occupies less space, facilitates gear shifting, and overall offers advantages such as a more compact structure, convenient gear shifting, comprehensive functions, and higher added value.

[0007] Another technical solution of the present invention is that, based on the above, the gearbox further includes a clutch shaft, which is disposed at one end of the first shaft opposite to the PTO shaft, and the clutch shaft is coaxial with the first shaft.

[0008] Another technical solution of the present invention is that, based on the above, the end of the first shaft near the clutch shaft is provided with an input tooth, and the end of the second shaft near the fourth gear drive tooth is provided with a total driven tooth, the total driven tooth meshing with the input tooth.

[0009] Another technical solution of the present invention is that, based on the above, the PTO shaft is provided with PTO output teeth, and the end of the PTO shaft opposite to the shaft is also provided with a PTO flange.

[0010] Another technical solution of the present invention is that, based on the above, the end of the two shaft opposite to the four-speed active tooth is also provided with a PTO input tooth, which meshes with the PTO output tooth.

[0011] Another technical solution of the present invention is that, based on the above, the gearbox is further provided with a reverse gear shaft parallel to the two shafts, and the reverse gear shaft is provided with reverse gear teeth, which can mesh with the first gear drive teeth.

[0012] Another technical solution of the present invention is that, based on the above, the gearbox further includes a control lever, the control lever is disposed on the housing, one end of the control lever is provided with a first shift fork, the fourth and fifth gear seat is provided with a fourth and fifth gear engagement sleeve, and the first shift fork is placed on the fourth and fifth gear engagement sleeve.

[0013] Another technical solution of the present invention is that, based on the above, one end of the control lever is further provided with a second shift fork, the second shift fork is disposed on one side of the first shift fork, and the end of the second shift fork is placed on the shift synchronizer.

[0014] Another technical solution of the present invention is that, based on the above, the first gear reverse gear seat is provided with a first gear reverse gear engaging sleeve, which can move left and right on the first gear reverse gear seat; the high and low gear seat is also provided with a high and low gear engaging sleeve, which can move left and right on the high and low gear seat; the two shafts are also provided with a plurality of semi-circular keys, and the main driven gear, the fourth gear driving gear and the third gear driving gear are all fixedly set on the two shafts by the semi-circular keys.

[0015] On the other hand, the present invention also proposes a tractor including a gearbox, said gearbox being the gearbox described above. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the structure of a gearbox according to the present invention.

[0018] The correspondence between the reference numerals in the attached figures is as follows:

[0019] 1. Clutch shaft 2. Power input gear 3. Total driven gear

[0020] 4. Semi-circular key; 5. Fourth-speed drive gear; 6. Third-speed drive gear

[0021] 7 Second gear drive gear 8 First gear drive gear 9 Front drive shaft

[0022] 10 Front drive input gear 11 Rear drive input gear 12 Rear drive shaft

[0023] 13 Rear drive flange 14 Transition shaft 15 Sliding gear

[0024] 16 Two-axis 17 PTO flange 18 PTO shaft

[0025] 19PTO output gear, 20 shaft 1, 21 high-speed input gear

[0026] 22 High and low gear seat 23 High and low gear engagement sleeve 24 Low gear input gear

[0027] 25 Reverse gear tooth 26 Reverse gear driven tooth 27 First gear / Reverse gear tooth seat

[0028] 28 First gear / reverse gear engagement sleeve; 29 First gear driven gear; 30 Second gear driven gear

[0029] 31. Shift synchronizer; 32. Third gear driven gear; 33. Fourth gear driven gear

[0030] 34 Fourth and fifth gear gear holders; 35 Fifth gear driven gear; 36 PTO input gear.

[0031] 37 High and low gear double gears 38 Housing 39 Control lever

[0032] 40 First shift fork 41 Second shift fork 42 Reverse gear shaft

[0033] 43 Fourth and Fifth Gear Gear Interchange Kit Detailed Implementation

[0034] 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 accordingly based on the description in this document.

[0035] The embodiments of the present invention are as follows, please refer to them. Figure 1The gearbox shown is used in a tractor and specifically includes a housing 38. Inside the housing 38 are a primary shaft 20, a secondary shaft 16, a crossover shaft 14, a front drive shaft 9, a rear drive shaft 12, and a PTO output shaft. The primary shaft 20, secondary shaft 16, crossover shaft 14, and front drive shaft 9 are arranged parallel to each other. The PTO output shaft is located at one end of the primary shaft 20, i.e., the right end shown in the figure, and the axes of the primary shaft 20 and the PTO output shaft coincide, i.e., they are on the same straight line. The rear drive shaft 12 is located at one end of the front drive shaft 9, i.e., the right end shown in the figure, and the axes of the front drive shaft 9 and the rear drive shaft 12 coincide, i.e., they are on the same straight line. On shaft 20, from left to right, are arranged the following gears in sequence: fifth gear driven gear 35, fourth and fifth gear seat 34, fourth gear driven gear 33, third gear driven gear 32, shift synchronizer 31, second gear driven gear 30, first gear driven gear 29, first and reverse gear seat 25, reverse gear driven gear 26, low gear input gear 24, high and low gear seat 22, and high gear input gear 21. On shaft 16, from left to right, are arranged the following gears in sequence: fourth gear driving gear 5, third gear driving gear 6, second gear driving gear 7, first gear driving gear 8, and high and low gear double gear 37. The fourth gear driving gear 5, third gear driving gear 6, second gear driving gear 7, and first gear driving gear 8 can respectively mesh with the fourth gear driven gear 33, third gear driven gear 32, second gear driven gear 30, and first gear driven gear 29. The bridge shaft 14 is provided with a sliding gear 15 that can move left and right, and the sliding gear 15 meshes with the high and low gear double gear 37. The front drive shaft 9 has a front drive input gear 10. When the sliding gear 15 slides to the left, the front drive input gear 10 can engage with the sliding gear 15, and the tractor is in front drive mode. The rear drive shaft 12 has a rear drive input gear 11, and the right end of the rear drive shaft 12 also has a rear drive flange 13. When the sliding gear 15 slides to the right, the rear drive input gear 11 can engage with the sliding gear 15, and the rear drive force is output through the rear drive flange 13, and the tractor is in rear drive mode. When the sliding gear 15 is in the middle position as shown in the figure, the sliding gear 15 engages with both the front drive input gear 10 and the rear drive input gear 11, and the tractor is in four drive mode. Compared with the existing gearbox structure, this gearbox structure occupies less space, is easier to operate, and overall has the advantages of a more compact structure, convenient shifting, complete functions, and higher added value.

[0036] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, the gearbox also includes a clutch shaft 1, which is located at one end of the primary shaft 20 away from the PTO shaft 18, i.e., the left end shown in the figure, and the clutch shaft 1 is coaxial with the primary shaft 20.

[0037] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1As shown, the end of shaft 20 near clutch shaft 1, i.e. the left end shown in the figure, is also provided with power input tooth 2. The end of shaft 16 near fourth gear drive tooth 5, i.e. the right end shown in the figure, is also provided with total driven tooth 3. The total driven tooth 3 meshes with power input tooth 2.

[0038] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, the PTO shaft 18 is provided with a PTO output tooth 19. The PTO shaft 18 is located away from the shaft 20 at one end, i.e., the right end shown in the figure, and is also provided with a PTO flange 17. When the PTO shaft 18 rotates, it drives the PTO flange 17 to rotate.

[0039] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, the end of the second shaft 16 that is away from the fourth gear drive tooth 5, i.e. the forward end shown in the figure, is also provided with a PTO input tooth 36. The PTO input tooth 36 meshes with the PTO output tooth 19. When the PTO input tooth 36 rotates with the second shaft 16, it can drive the PTO output tooth 19 that meshes with it to rotate.

[0040] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, the gearbox also has a reverse gear shaft 42 parallel to the second shaft 16. The reverse gear shaft 42 is equipped with a reverse gear tooth 25, which can mesh with the first gear drive tooth 8. When the first gear drive tooth 8 rotates, it can drive the reverse gear tooth 25 to rotate. When the reverse gear tooth 25 rotates, it drives the reverse gear shaft 42 to rotate, thereby realizing the tractor reversing.

[0041] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, the gearbox also includes a control lever 39, which is mounted on the housing 38, specifically on the top of the housing 38. One end of the control lever 39, i.e. the lower left end shown in the figure, is provided with a first shift fork 40. The fourth and fifth gear seat 34 is provided with a fourth and fifth gear engagement sleeve 43 that can slide left and right. The end of the first shift fork 40 is placed on the fourth and fifth gear engagement sleeve 43. When the first shift fork 40 moves left and right, it drives the fourth and fifth gear engagement sleeve 43 to move left and right, thereby realizing the power output of the fourth or fifth gear.

[0042] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, one end of the control lever 39, i.e. the lower right end shown in the figure, is also provided with a second shift fork 41. The second shift fork 41 is located on one side of the first shift fork 40, i.e. the right inner side shown in the figure. The first gear reverse gear seat 25 is provided with a first gear reverse gear engagement sleeve 28 that moves left and right. The end of the second shift fork 41 is placed on the shift synchronizer 31. When the second shift fork 41 moves left and right, it drives the first gear reverse gear engagement sleeve 28 to move left and right, thereby realizing the power output of third gear or second gear.

[0043] Based on the above embodiments, in another embodiment of the present invention, such as... Figure 1 As shown, a first-gear / reverse gear seat 25 is provided with a first-gear / reverse gear engagement sleeve 28. The first-gear / reverse gear engagement sleeve 28 can move left and right on the first-gear / reverse gear seat 25. When it moves to the left, it can realize the first gear power output, and when it moves to the right, it can realize the reverse gear power output. In addition, a high-low gear seat 22 is also provided with a high-low gear engagement sleeve 23, which can move left and right on the high-low gear seat 22. The second shaft 16 is also provided with several semi-circular keys 4. The main driven gear 3, the fourth gear driving gear 5, and the third gear driving gear 6 are all fixedly set on the second shaft 16 by the semi-circular keys 4. When the second shaft 16 rotates, it drives the main driven gear 3, the fourth gear driving gear 5, and the third gear driving gear 6 to rotate.

[0044] In this gearbox structure, when the fourth-to-fifth gear engagement sleeve 43 moves to the left, fifth-gear power output is achieved; when the fourth-to-fifth gear engagement sleeve 43 moves to the left, fourth-gear power output is achieved. When the shift synchronizer 31 moves to the left, third-gear power output is achieved; when the shift synchronizer 31 moves to the right, second-gear power output is achieved. When the first-gear / reverse gear engagement sleeve 28 moves to the left, first-gear power output is achieved; when the first-gear / reverse gear engagement sleeve 28 moves to the right, reverse gear power output is achieved. When the high-to-low gear engagement sleeve 23 moves to the right on the high-to-low gear seat 22, PTO power output is achieved; when the high-to-low gear engagement sleeve 23 moves to the left on the high-to-low gear seat 22, PTO power output is interrupted. Compared with existing gearbox structures, this gearbox has the advantages of a more compact structure, convenient shifting, complete functions, and higher added value.

[0045] Furthermore, the present invention also proposes a tractor, which specifically includes a gearbox, specifically the gearbox described above.

[0046] Tractors with this structure, correspondingly, possess the advantages of the aforementioned gearboxes.

[0047] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A gearbox for use in a tractor, characterized in that, The device includes a housing, which contains a primary shaft, a secondary shaft, a bridge shaft, a front drive shaft, a rear drive shaft, and a PTO output shaft. The primary shaft, secondary shaft, bridge shaft, and front drive shaft are arranged in parallel. The PTO output shaft is located at one end of the primary shaft, and the axes of the primary shaft and the PTO output shaft coincide. The rear drive shaft is disposed at one end of the front drive shaft, and the axes of the front drive shaft and the rear drive shaft coincide. The shaft is sequentially provided with a fifth-gear driven gear, a fourth-gear and fifth-gear gear seat, a fourth-gear driven gear, a third-gear driven gear, a shift synchronizer, a second-gear driven gear, a first-gear driven gear, a first-gear reverse gear seat, a reverse gear driven gear, a low-gear input gear, a high-low gear gear seat, and a high-gear input gear. The two shafts are sequentially equipped with a fourth-speed active gear, a third-speed active gear, a second-speed active gear, a first-speed active gear, and a high-low gear double gear. The fourth-speed active gear, the third-speed active gear, the second-speed active gear, and the first-speed active gear can respectively mesh with the fourth-speed passive gear, the third-speed passive gear, the second-speed passive gear, and the first-speed passive gear. The bridge shaft is provided with movable sliding teeth, which mesh with the high and low gear double teeth; The front drive shaft is provided with a front drive input tooth, which can mesh with the sliding tooth; The rear drive shaft is provided with a rear drive input tooth, which can mesh with the sliding tooth.

2. The gearbox according to claim 1, characterized in that, The gearbox further includes a clutch shaft, which is located at one end of the first shaft opposite to the PTO shaft, and the clutch shaft is coaxial with the first shaft.

3. The gearbox according to claim 2, characterized in that, The first shaft is provided with a power input tooth at one end near the clutch shaft, and the second shaft is provided with a total driven tooth at one end near the fourth gear drive tooth, the total driven tooth meshing with the power input tooth.

4. The gearbox according to claim 3, characterized in that, The PTO shaft is provided with PTO output teeth, and the end of the PTO shaft opposite to the shaft is also provided with a PTO flange.

5. The gearbox according to claim 4, characterized in that, The end of the two shaft opposite to the fourth gear drive tooth is also provided with a PTO input tooth, which meshes with the PTO output tooth.

6. The gearbox according to claim 5, characterized in that, The gearbox also includes a reverse gear shaft parallel to the two shafts. The reverse gear shaft has reverse gear teeth that can mesh with the first gear drive teeth.

7. The gearbox according to claim 6, characterized in that, The gearbox also includes a control lever, which is mounted on the housing. One end of the control lever is provided with a first shift fork, and the fourth and fifth gear seats are provided with a fourth and fifth gear engagement sleeve. The end of the first shift fork is placed on the fourth and fifth gear engagement sleeve.

8. The gearbox according to claim 7, characterized in that, One end of the control lever is also provided with a second shift fork, which is located on one side of the first shift fork, and the end of the second shift fork is placed on the shift synchronizer.

9. The gearbox according to claim 8, characterized in that, The first gear reverse gear tooth seat is provided with a first gear reverse gear engagement sleeve, which can move left and right on the first gear reverse gear tooth seat; The high and low gear seat is also provided with a high and low gear engagement sleeve, which can move left and right on the high and low gear seat. The two shafts are also provided with several semi-circular keys, and the main driven tooth, the fourth-gear driving tooth, and the third-gear driving tooth are all fixedly mounted on the two shafts by the semi-circular keys.

10. A tractor, including a gearbox, characterized in that, The gearbox is the tractor according to any one of claims 1 to 9.

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