Gearbox and agricultural machine
By adding a second housing and an overpass shaft to the transmission, front-wheel drive, four-wheel drive, and rear-wheel drive functions are achieved, solving the problems of large structure, unstable performance, and high cost of existing transmissions, and providing a compact, reliable, and comprehensive solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA SUNLIGHT AGRI MACHINERY FACILITIES
- Filing Date
- 2025-06-14
- Publication Date
- 2026-04-24
AI Technical Summary
Existing gearboxes in agricultural machinery are bulky, have unstable performance, limited functionality, and high cost, failing to meet the diverse needs of users.
A gearbox was designed by adding a second gearbox to the right end of the first gearbox and setting a bridge shaft in the second gearbox to achieve independent power transmission to the rear drive gear belt shaft. Combined with components such as the first shaft, second shaft, and bevel gear shaft, it adds independent rear drive function, forming a compact structure with front drive, four drive and rear drive functions.
It has achieved a gearbox with a compact structure, stable and reliable performance, low operating cost and full functionality, to meet the diverse needs of agricultural machinery.
Smart Images
Figure CN224162047U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery, and in particular to a gearbox and agricultural machinery. Background Technology
[0002] In recent years, with the continuous development of the agricultural economy, agricultural machinery of various structures, such as tractors, has been increasingly widely used in agricultural production activities.
[0003] Tractors, including their transmission components such as gearboxes, currently widely use gearboxes primarily for small-area farmland operations and transportation in areas with relatively poor road conditions, such as mountainous regions and ditches, and their function is relatively simple. However, as user requirements continue to increase, their performance and reliability can no longer meet those requirements. To increase their output power, it is necessary to add an auxiliary gearbox or front and rear drive transfer cases. Simply stacking existing devices together would not only result in a bulky design and high modification costs, but also fail to meet stability requirements.
[0004] In summary, how to provide a gearbox with a compact structure, more stable and reliable performance, lower operating costs, and more complete functions, as well as agricultural machinery including such a gearbox, 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 gearbox with a compact structure, more stable and reliable performance, lower operating cost, and more complete functions, as well as agricultural machinery including this gearbox.
[0006] The solution of this utility model is implemented as follows: This utility model proposes a gearbox for use in agricultural machinery. The gearbox includes a first housing and a second housing connected to each other. The first housing is provided with a first shaft, a second shaft, and a bevel gear shaft. The second housing is provided with a PTO output shaft, a bridge shaft, and a rear drive belt shaft. The PTO output shaft is located at one end of the first shaft. The first shaft is sequentially provided with a low-speed transmission gear, a fourth-speed fixed gear, a third-speed fixed gear, a second-speed fixed gear, and a first-speed fixed gear. The second shaft is arranged parallel to the first shaft. The bridge shaft is located at one end of the second shaft. The second shaft is sequentially provided with a low-speed fixed gear, a high-low speed sliding gear, an adjustment fixed gear, and a fourth-speed dual-gear. The gearbox comprises a first gearbox, a second gearbox, a third- and fourth-gear gearbox, a third-gear double gearbox, a first- and second-gear gearbox, and a first-gear double gearbox. The bridge shaft is sequentially equipped with front and rear drive driven gears, a front drive driving gear, a driving gear, and front and rear drive gear seats. The driving gear also has a movable front and rear drive engagement sleeve. One end of the front and rear drive engagement sleeve has a rear drive input gear, which is fitted onto the front and rear drive gear seats. A bevel gear shaft is parallel to the second shaft, and a rear drive gear belt shaft is located at one end of the bevel gear shaft. The bevel gear shaft is sequentially equipped with bevel teeth, end-drive teeth, front and rear drive driving gears, and a front drive driven gear. The rear drive gear belt shaft has rear drive teeth and a rear drive flange, and the rear drive teeth mesh with the rear drive input teeth. This gearbox structure, by adding a second housing to the right end of the first housing and installing a bridge shaft within the second housing, allows power from the first shaft to be transmitted independently to the rear drive gear belt shaft, thus adding a separate rear drive function to the existing gearbox's independent front-drive and four-wheel drive capabilities. Therefore, compared with the existing gearbox structure, it has the advantages of compact structure, more stable and reliable performance, lower operating cost, and more complete functions.
[0007] Another technical solution of this utility model is that, based on the above, the gearbox further includes a clutch shaft, the clutch shaft is disposed at one end of the shaft, and a connecting sleeve is provided at one end of the clutch shaft near the shaft, and the clutch shaft is connected to the end of the shaft through the connecting sleeve.
[0008] Another technical solution of this utility model is that, based on the above, the gearbox further includes a PTO output shaft, which is disposed at the other end of the primary shaft, and the axes of the clutch shaft, the primary shaft and the PTO output shaft coincide.
[0009] Another technical solution of this utility model is that, based on the above, the gearbox further includes a spline sleeve, which is movably disposed at the connection between the primary shaft and the PTO output shaft, and the end of the PTO output shaft opposite to the primary shaft is also provided with an output flange.
[0010] Another technical solution of this utility model is that, based on the above, a movable third and fourth gear engagement sleeve is provided around the third and fourth gear action teeth, and a first shift fork groove is provided on the third and fourth gear engagement sleeve, and a first shift fork is provided in the first shift fork groove.
[0011] Another technical solution of this utility model is that, based on the above, a movable first and second gear engagement sleeve is provided around the first and second gear action teeth, and a second shift fork groove is provided on the first and second gear engagement sleeve, and a second shift fork is provided in the second shift fork groove.
[0012] Another technical solution of this utility model is that, based on the above, the bevel gear shaft is further provided with a number of parallel conical bearings at one end near the rear drive belt shaft, and the second housing is disposed on the conical bearings.
[0013] Another technical solution of this utility model is that, based on the above, the tapered bearing is further provided with a needle roller bearing at the end opposite to the bevel tooth, and the rear drive tooth is sleeved on the needle roller bearing.
[0014] Another technical solution of this utility model is that, based on the above, a front and rear drive input shaft is also sleeved on the bevel gear shaft, and one end of the front and rear drive input shaft is fixedly connected to the end drive gear or is an integral structure.
[0015] On the other hand, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox 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 internal structure of a gearbox according to the present invention.
[0018] The correspondence between the attached figures is as follows:
[0019] 1. Clutch shaft 2. Connecting sleeve 3. Shaft
[0020] 4. Low-speed transmission gear; 5. Fourth-gear fixed gear; 5.1 Fourth-gear double gear.
[0021] 6. Third gear fixed gear; 7. Second gear fixed gear; 8. First gear fixed gear.
[0022] 81 single-speed double-tooth 9-spline sleeve 10PTO output shaft
[0023] 11 Output flange 12 First and second gear engagement sleeve 121 First and second gear actuating teeth
[0024] 13 Front and rear drive input shafts; 14 Third and fourth gear engagement sleeves; 15 Bevel gear shaft.
[0025] 16 End drive gear 17 Adjustment and fixing gear 18 High and low speed sliding gear
[0026] 19 Low-speed fixed gear; 20 Two-shaft; 21 Rear drive input gear
[0027] 22 Front and rear drive gear seats 23 Transition shaft 24 Drive gear
[0028] 25 Front and rear drive coupling sleeve; 26 Rear drive flange; 27 Rear drive toothed belt shaft
[0029] 28 Needle roller bearing 29 Tapered roller bearing 30 Front drive gear
[0030] 31 Front-wheel drive passive gear; 32 Front and rear-wheel drive passive gear; 33 Front and rear-wheel drive active gear
[0031] 34 Third gear double gear; 35 Third and fourth gear action gear; 36 Rear drive gear.
[0032] 37 First shift fork groove 38 First shift fork 39 Second shift fork groove
[0033] 40 Second shift fork 41 First housing 42 Second housing
[0034] 43 joystick 44 bevel gear Detailed Implementation
[0035] 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.
[0036] The embodiments of this utility model are as follows, please refer to them. Figure 1The gearbox shown is used in agricultural machinery. The gearbox includes a first housing 41 and a second housing 42 connected to each other. The second housing 42 is located at the right end of the first housing 41. The first housing 41 contains a first shaft 3, a second shaft 20, and a bevel gear shaft 15. The second housing 42 contains a PTO output shaft 10, a bridge shaft 23, and a rear drive belt shaft 27. The PTO output shaft 10 is located at one end of the first shaft 3, i.e., the right end shown in the figure. From left to right, the first shaft 3 is sequentially equipped with a low-speed transmission gear 4, a fourth-speed fixed gear 5, a third-speed fixed gear 6, a second-speed fixed gear 7, and a first-speed fixed gear 8. The second shaft 20 is arranged parallel to the first shaft 3. The bridge shaft 23 is located at one end of the second shaft 20. The second shaft 20 is sequentially provided with a low-speed fixed gear 19, a high-low speed sliding gear 18, an adjustment fixed gear 17, a fourth-speed double gear 51, a third- and fourth-speed action gear 35, a third-speed double gear 34, a first- and second-speed action gear 121, and a first-speed double gear 81. From left to right, the bridge shaft 23 is sequentially provided with a front and rear drive passive gear 32, a front drive active gear 30, an active action gear 24, and a front and rear drive action gear seat 22. The active action gear 24 is also provided with a movable front and rear drive engagement sleeve 25. One end of the front and rear drive engagement sleeve 25, i.e., the right end shown in the figure, is also provided with a rear drive input gear 21, which is specifically fitted onto the front and rear drive action gear seat 22. The bevel gear shaft 15 is arranged parallel to the second shaft 20. The rear drive belt shaft 27 is located at one end of the bevel gear shaft 15, i.e., the right end shown in the figure. The bevel gear shaft 15 is provided with bevel teeth, end drive teeth 16, front and rear drive driving teeth 33, and front drive driven teeth 31 in sequence. The rear drive belt shaft 27 is provided with rear drive teeth 36 and rear drive flange 26. The rear drive teeth 36 mesh with the rear drive input teeth 21. In this gearbox structure, by adding a second housing 42 to the right end of the first housing 41 and by setting a bridge shaft 23 in the second housing 42, the power from the first shaft 3 can be transmitted separately to the rear drive belt shaft 27. That is, in addition to the existing gearbox having independent front drive and four drive functions, it adds independent rear drive function. Therefore, compared with the existing gearbox structure, it has the advantages of compact structure, more stable and reliable performance, lower operating cost, and more complete functions.
[0037] 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 shaft 3, i.e., the left end shown in the figure. The clutch shaft 1 is provided with a connecting sleeve 2 at one end of the shaft 3, i.e., the right end shown in the figure. The clutch shaft 1 is connected to the left end of the shaft 3 through the connecting sleeve 2.
[0038] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, the gearbox also includes a PTO output shaft 10, which is located at the other end of the primary shaft 3, i.e., the right end shown in the figure. The axes of the clutch shaft 1, the primary shaft 3 and the PTO output shaft 10 coincide, i.e., the clutch shaft 1, the primary shaft 3 and the PTO output shaft 10 are on a straight line.
[0039] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the gearbox also includes a spline sleeve 9, which is movably disposed at the connection between the shaft 3 and the PTO output shaft 10. The PTO output shaft 10 is located away from the shaft 3 at one end, i.e., the right end shown in the figure, and is also provided with an output flange 11 for connection.
[0040] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the outer periphery of the third and fourth gear action teeth 35 is also provided with a third and fourth gear engagement sleeve 14 that can move left and right. The third and fourth gear engagement sleeve 14 is also provided with a first shift fork groove 37, and a first shift fork 38 is provided in the first shift fork groove 37. Under the action of the first shift fork 38, the third and fourth gear engagement sleeve 14 can move left and right.
[0041] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the outer periphery of the first and second gear action teeth 121 is also provided with a first and second gear engagement sleeve 12 that can move left and right. The first and second gear engagement sleeve 12 is also provided with a second shift fork groove 39. A second shift fork 40 is provided in the second shift fork groove 39. Under the action of the second shift fork 40, the first and second gear engagement sleeve 12 can move left and right.
[0042] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the bevel gear shaft 15 near one end of the rear drive belt shaft 27, i.e., the right end shown in the figure, is also provided with several conical bearings 29 arranged in parallel, and the second housing 42 is disposed on the conical bearings 29. Furthermore, the number of conical bearings 29 is two.
[0043] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the tapered bearing 29 is located away from the bevel gear 44 at one end, i.e., the right end shown in the figure, and a needle roller bearing 28 is also provided thereon, with the rear drive gear 36 sleeved on the needle roller bearing 28.
[0044] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, a front and rear drive input shaft 13 is also fitted onto the bevel gear shaft 15. One end of the front and rear drive input shaft 13, i.e., the left end shown in the figure, is fixedly connected to the right end of the end drive gear 16, or it is an integral structure. In addition, the first housing 41 is also provided with several control levers 43 for operation.
[0045] The aforementioned gearbox structure, by adding a second housing 42 to the right end of the first housing 41 and by installing a cross-bridge shaft 23 within the second housing 42, allows power from the first shaft 3 to be independently transmitted to the rear-drive belt shaft 27. This adds independent rear-drive functionality to the existing gearbox's independent front-drive and four-wheel drive capabilities. Therefore, compared to existing gearbox structures, it offers advantages such as a compact structure, more stable and reliable performance, lower operating costs, and more comprehensive functionality.
[0046] In addition, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox described above.
[0047] In the aforementioned agricultural machinery, when rear-wheel drive is required during operation, power is input from clutch shaft 1 to primary shaft 3, and then transmitted from primary shaft 3 to secondary shaft 20. Secondary shaft 20 transmits power to end drive gear 16 via high- and low-speed sliding gears 18. End drive gear 16 then transmits power via front and rear drive input shafts 13 to front and rear drive driving gears 33, and then to front and rear drive driven gears 32, thereby driving the bridge shaft 23 to rotate. The front and rear drive engagement sleeve 25 moves to the right. At this time, when the bridge shaft 23 rotates, it drives the rear drive input gear 21 to rotate. When the rear drive input gear 21 rotates, it drives the meshing rear drive gear 36 to rotate, thereby driving the rear drive belt shaft 27 to rotate, realizing rear-wheel drive. During this process, the PTO output shaft 10 is disconnected from primary shaft 3.
[0048] When front-wheel drive is required, power is input from clutch shaft 1 to primary shaft 3, and then transmitted from primary shaft 3 to secondary shaft 20. Secondary shaft 20 transmits power to end drive gear 16 via high and low speed sliding gear 18. End drive gear 16 then transmits power to front and rear drive driving gears 33 via front and rear drive input shaft 13, and then to front and rear drive driven gears 32, thereby driving the bridge shaft 23 to rotate. The front and rear drive engagement sleeve 25 moves to the left. At this time, when the bridge shaft 23 rotates, it drives the front drive driving gear 30 to rotate. When the front drive driving gear 30 rotates, it drives the meshing front drive driven gear 31 to rotate, thereby driving the bevel gear shaft 15 to rotate, realizing front-wheel drive. During this process, the PTO output shaft 10 is disconnected from primary shaft 3.
[0049] When four-wheel drive is required, power is input from clutch shaft 1 to primary shaft 3, and from primary shaft 3, the first gear fixed gear 8 is transmitted to primary gear double gear 81, thereby driving secondary shaft 20 to rotate. Secondary shaft 20 drives adjusting fixed gear 17 to rotate, adjusting fixed gear 17 drives the low-speed transmission gear 4 meshing with it to rotate, and low-speed transmission gear 4 simultaneously drives low-speed fixed gear 19 to rotate. High-low speed sliding gear 18 moves to the left and is driven to rotate by low-speed fixed gear 19. When high-low speed sliding gear 18 rotates, it drives the end transmission gear 16 meshing with it to rotate, thus driving the rotation of the gear. The power is transmitted to the front and rear drive active gears 33 and the front and rear drive passive gears 32. The front and rear drive passive gears 32 drive the axle shaft 23 to rotate. The front and rear drive engagement sleeve 25 transmits the power to the rear drive input gear 21. When the rear drive input gear 21 rotates, it drives the rear drive gear 36 that meshes with it to rotate, thereby driving the rear drive gear belt shaft 27 to rotate. At the same time, the front and rear drive engagement sleeve 25 transmits the power to the front drive active gear 30. When the front drive active gear 30 rotates, it drives the front drive passive gear 31 to rotate, thereby driving the bevel gear shaft 15 to rotate, ultimately achieving four-wheel drive.
[0050] This type of agricultural machinery, in addition to having separate front-wheel drive and four-wheel drive functions, also has separate rear-wheel drive function. It is not only more functional, but also has lower operating costs and more stable and reliable performance.
[0051] 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 gearbox for use in agricultural machinery, characterized in that, The gearbox includes a first housing and a second housing connected to each other, and the first housing is respectively provided with a first shaft, a second shaft and a bevel gear shaft; The second housing is respectively provided with a PTO output shaft, a bridge shaft and a rear drive toothed belt shaft, with the PTO output shaft located at one end of the shaft; The shaft is sequentially provided with a low-speed transmission gear, a fourth-speed fixed gear, a third-speed fixed gear, a second-speed fixed gear, and a first-speed fixed gear. The two shafts are arranged parallel to the one shaft, and the bridge shaft is arranged at one end of the two shafts. The two shafts are sequentially provided with a low-speed fixed gear, a high-low speed sliding gear, an adjustment fixed gear, a fourth-speed double gear, a third- and fourth-speed action gear, a third-speed double gear, a first- and second-speed action gear, and a first-speed double gear. The bridge shaft is sequentially provided with front and rear drive passive teeth, front drive active teeth, active action teeth, and front and rear drive action tooth seats. The active action teeth are also provided with movable front and rear drive engagement sleeves. One end of the front and rear drive engagement sleeve is provided with a rear drive input tooth, which is sleeved on the front and rear drive action tooth seats. The bevel gear shaft is arranged parallel to the two shafts, and the rear drive tooth belt shaft is arranged at one end of the bevel gear shaft. The bevel gear shaft is provided with bevel teeth, end drive teeth, front and rear drive active teeth and front drive passive teeth in sequence. The rear drive belt shaft is provided with rear drive teeth and a rear drive flange, and the rear drive teeth mesh with the rear drive input teeth.
2. The gearbox according to claim 1, characterized in that, The gearbox also includes a clutch shaft, which is disposed at one end of the shaft. A connecting sleeve is provided at one end of the clutch shaft near the shaft, and the clutch shaft is connected to the end of the shaft through the connecting sleeve.
3. The gearbox according to claim 2, characterized in that, The gearbox also includes a PTO output shaft, which is located at the other end of the primary shaft, and the axes of the clutch shaft, the primary shaft, and the PTO output shaft coincide.
4. The gearbox according to claim 3, characterized in that, The gearbox also includes a spline sleeve, which is movably disposed at the connection between the primary shaft and the PTO output shaft. The end of the PTO output shaft opposite to the primary shaft is also provided with an output flange.
5. The gearbox according to claim 4, characterized in that, The outer periphery of the third and fourth gear action teeth is also provided with a movable third and fourth gear engagement sleeve, and the third and fourth gear engagement sleeve is also provided with a first shift fork groove, and a first shift fork is provided in the first shift fork groove.
6. The gearbox according to claim 5, characterized in that, The outer periphery of the first and second gear action teeth is also provided with a movable first and second gear engagement sleeve, and the first and second gear engagement sleeve is also provided with a second shift fork groove, and a second shift fork is provided in the second shift fork groove.
7. The gearbox according to claim 6, characterized in that, The bevel gear shaft is also provided with a number of parallel tapered bearings at one end near the rear drive belt shaft, and the second housing is disposed on the tapered bearings.
8. The gearbox according to claim 7, characterized in that, The tapered bearing is further provided with a needle roller bearing at the end opposite to the bevel gear, and the rear drive gear is sleeved on the needle roller bearing.
9. The gearbox according to claim 8, characterized in that, The bevel gear shaft is also fitted with front and rear drive input shafts, one end of which is fixedly connected to the end drive gear or is an integral structure.
10. An agricultural machine, including a gearbox, characterized in that, The gearbox is the gearbox according to any one of claims 1 to 9.