Gearbox and agricultural machine

Abstract

The gearbox comprises a box body, a power takeoff (PTO) output shaft and a six-drive output shaft are arranged in the box body, the PTO output shaft and the six-drive output shaft are arranged in parallel, a driven bevel gear is further arranged on one side of the six-drive output shaft, and a differential mechanism assembly is further arranged in the driven bevel gear; an inter-axle differential mechanism is further arranged on one side of the differential mechanism assembly and comprises a differential box shell, a rotatable rear drive input shaft is arranged in the differential box shell, a bevel gear shaft is arranged at the end, close to the differential mechanism assembly, of the rear drive input shaft, a driving bevel gear is arranged on the bevel gear shaft, and a driven bevel gear is arranged on the driving bevel gear. The driving bevel gear is meshed with the driven bevel gear; a left bevel gear and a right bevel gear are further arranged in the differential mechanism shell, and the bevel gear shaft is sleeved with the left bevel gear and the right bevel gear respectively. A planet shaft is further arranged on one side of the bevel gear shaft, planet teeth are arranged on the planet shaft, and the planet teeth are meshed with the left bevel gear and the right bevel gear.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to a gearbox and agricultural machinery. Background Art

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

[0003] The gearbox, whose structure includes a speed transmission mechanism and an operating mechanism, is a mechanism used to change the power and torque from the engine and is an important component of agricultural machinery. Agricultural machinery, such as tractors, include a variety of drive forms, including two-wheel drive, four-wheel drive and six-wheel drive, and the corresponding gearbox structures also vary greatly. In the current six-wheel drive gearbox, when the speeds of the rear-wheel drive input shaft, the six-wheel drive output shaft, and the active bevel gear are inconsistent during operation, it will cause the drive to be out of sync, thus causing damage to the relatively weak links in the transmission system. The most common form of failure is broken gears. Alternatively, due to production errors in tires, or differences in wear, load, and tire pressure, a tire may slip, causing severe wear of the tire.

[0004] To sum up, how to find a gearbox that can effectively solve the inconsistent speeds of the rear-wheel drive input shaft, the six-wheel drive output shaft, and the active bevel gear without causing damage to any components, and agricultural machinery including this gearbox, has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a gearbox which can effectively solve the speed inconsistency of the rear drive input shaft, the six-wheel drive output shaft and the active bevel gear without causing damage to any components, and an agricultural machinery including the gearbox.

[0006] The solution of the present invention is achieved as follows: the present invention proposes a gearbox for agricultural machinery, including a housing, wherein a PTO output shaft and a six-wheel drive output shaft are arranged in parallel with the six-wheel drive output shaft, a passive bevel gear is also arranged on one side of the six-wheel drive output shaft, and a differential assembly is also arranged in the passive bevel gear; an inter-axle differential is also arranged on one side of the differential assembly, and the inter-axle differential includes a differential case housing, a rotatable rear-drive input shaft is arranged in the differential case housing, and an bevel gear shaft is arranged at one end of the rear-drive input shaft close to the differential assembly, and an active bevel gear is arranged on the bevel gear shaft, and the active bevel gear is meshed with the passive bevel gear; a left bevel gear and a right bevel gear that are arranged oppositely are also arranged in the differential case, and the left bevel gear and the right bevel gear are respectively sleeved on the bevel gear shaft; a planetary shaft is also arranged on one side of the bevel gear shaft, and a rotatable planetary gear is arranged on the planetary shaft, and the planetary gear is respectively meshed with the left bevel gear and the right bevel gear. When the gearbox of this structure is working, the rear drive input shaft transmits the torque to the inter-axle differential, thereby driving the inter-axle differential to rotate, and at the same time driving the active bevel gear and the six-wheel drive output shaft to rotate, thereby realizing the output of torque. Compared with the gearbox of the existing structure, under the action of the inter-axle differential, the problem of inconsistent speeds of the rear drive input shaft, the six-wheel drive output shaft, and the active bevel gear can be effectively solved, which can effectively avoid damage to any components and extend the overall service life of the gearbox.

[0007] Another technical solution of the present invention is that on the basis of the above, the inter-axle differential also includes a left half shell and a right half shell arranged in the differential case housing, the left half shell and the right half shell are arranged opposite to each other, the ends of the left half shell and the right half shell are detachably fixedly connected, and the left bevel gear and the right bevel gear are arranged in the left half shell and the right half shell.

[0008] Another technical solution of the present invention is that on the basis of the above, the left half shell is further provided with a third bearing, and the right half shell is further provided with a fourth bearing, and the left half shell and the right half shell are respectively connected to the differential case housing through the third bearing and the fourth bearing.

[0009] Another technical solution of the present invention is that on the basis of the above, the inter-axle differential further comprises a cover plate detachably arranged at one end of the differential housing, and the cover plate is placed at one end of the differential housing away from the differential assembly.

[0010] Another technical solution of the present invention is that on the basis of the above, a fifth bearing is further sleeved on the rear-drive input shaft, and the end of the cover plate away from the differential case housing is rotatably arranged on the fifth bearing; the end of the fifth bearing away from the bevel gear shaft is also provided with a seal, and the outer periphery of the seal is abutted against the inner side of the cover plate.

[0011] Another technical solution of the present invention is that on the basis of the above, a detachable rear-drive input flange is further provided at one end of the rear-drive input shaft away from the bevel gear shaft, and the sealing element is sleeved on the rear-drive input flange.

[0012] Another technical solution of the present invention is that on the basis of the above, a double-linked tooth is further sleeved on the bevel gear shaft, and a six-wheel drive output tooth is further provided on the six-wheel drive output shaft, the double-linked tooth is meshed with the six-wheel drive output tooth, and a detachable output flange is further provided at one end of the six-wheel drive output shaft.

[0013] Another technical solution of the present invention is that on the basis of the above, a PTO input shaft is further provided in the housing, and the PTO input shaft is arranged between the PTO output shaft and the six-wheel drive output shaft, and is respectively arranged parallel to the PTO output shaft and the six-wheel drive output shaft, and a PTO input flange is also provided at one end of the PTO input shaft.

[0014] Another technical solution of the present invention is that on the basis of the above, the PTO input shaft is further provided with a fixed input tooth, the PTO output shaft is further provided with a PTO output tooth, the input tooth is meshed with the PTO output tooth, one side of the PTO output tooth is further provided with a tooth seat, and the tooth seat is provided with a movable coupling sleeve.

[0015] On the other hand, the present invention further provides an agricultural machine, comprising a gearbox, wherein the gearbox is the gearbox as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 It is a structural schematic diagram of a gearbox of the present invention;

[0018] Figure 2 The figure is a schematic diagram of the structure of an agricultural machinery of the present invention.

[0019] The corresponding relationship of the reference numerals is:

[0020] 1 housing 2 PTO output gear 3 needle roller bearing

[0021] 4 Gear seat 5 Coupling sleeve 6 PTO output shaft

[0022] 7PTO input shaft 8Output flange 9Six-wheel drive output shaft

[0023] 10 passive bevel gear 11 differential assembly 12 active bevel gear

[0024] 13 bearing seat 14 first bearing 15 nut

[0025] 16 double gear 17 second bearing 18 spacer

[0026] 19 differential case housing 20 cover plate 21 copper sleeve

[0027] 22 Rear drive input shaft 23 Rear drive input flange 24 Left half housing

[0028] 25 left bevel gear 26 planetary gear 27 planetary shaft

[0029] 28 right half housing 29 right bevel gear 30 six-wheel drive output gear

[0030] 31PTO input flange 32Bevel gear shaft 33Third bearing

[0031] 34 fourth bearing 35 fifth bearing 36 seal

[0032] 37 Input teeth DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. In addition, those skilled in the art can make corresponding combinations of the features in the embodiments and in different embodiments in this document based on the description of this document.

[0034] The embodiments of the present invention are as follows, see Figure 1 to Figure 2The gearbox and agricultural machinery shown in the figure, specifically, the gearbox includes a housing 1, a PTO output shaft 6 and a six-wheel drive output shaft 9 are arranged in the housing 1, the PTO output shaft is arranged in parallel with the six-wheel drive output shaft 9, and a passive bevel gear 10 is also arranged on one side of the six-wheel drive output shaft 9, that is, the lower side shown in the figure, and a differential assembly 11 is also arranged in the passive bevel gear 10. An inter-axle differential is also arranged on one side of the differential assembly 11, that is, the left side shown in the figure, and the inter-axle differential specifically includes a differential case housing 19, a rotatable rear-drive input shaft 22 is arranged in the differential case housing 19, and an end of the rear-drive input shaft 22 close to the differential assembly 11, that is, the right end shown in the figure, is provided with a bevel gear shaft 32, and a copper sleeve 21 is also arranged between the bevel gear shaft 32 and the rear-drive input shaft 22, and an active bevel gear 12 is arranged on the bevel gear shaft 32, and the active bevel gear 12 is meshed with the passive bevel gear 10. The differential housing is also provided with a left bevel gear 25 and a right bevel gear 29 which are arranged opposite to each other. The left bevel gear 25 and the right bevel gear 29 have the same structure. The left bevel gear 25 and the right bevel gear 29 are respectively sleeved on the bevel gear shaft 32. One side of the bevel gear shaft 32, that is, the upper side or the lower side shown in the figure, or the upper side and the lower side are provided with a planetary shaft 27, and the planetary shaft 27 is provided with a rotatable planetary gear 26, and the planetary gear 26 is respectively engaged with the left bevel gear 25 and the right bevel gear 29. When the gearbox of this structure is working, the rear drive input shaft 22 transmits the torque to the inter-axle differential, thereby driving the inter-axle differential to rotate, and at the same time driving the active bevel gear 12 and the six-wheel drive output shaft 9 to rotate, so as to realize the output of the torque. Compared with the gearbox of the existing structure, under the action of the inter-axle differential, the problem of inconsistent rotation speeds of the rear drive input shaft 22, the six-wheel drive output shaft 9, and the active bevel gear 12 can be effectively solved, and the damage of any component can be effectively avoided, and the overall service life of the gearbox can be extended.

[0035] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the inter-axle differential also includes a left half shell 24 and a right half shell 28 disposed in the differential case housing 19, the left half shell 24 and the right half shell 28 are disposed opposite to each other, the ends of the left half shell 24 and the right half shell 28 are detachably fixedly connected, and the left bevel gear 25 and the right bevel gear 29 are disposed in the left half shell 24 and the right half shell 28. Specifically, the upper end or the lower end, or the upper end and the lower end of the left half shell 24 and the right half shell 28 are provided with connecting holes, and connecting members are disposed in the connecting holes, and the left half shell 24 and the right half shell 28 are connected together by the connecting members, and the connecting holes are preferably screw holes, and the connecting members are preferably bolts.

[0036] Based on the above embodiment, in another embodiment of the present invention, Figure 1As shown, the left half shell 24 is also sleeved with a third bearing 33, and the right half shell 28 is also sleeved with a fourth bearing 34. The left half shell 24 and the right half shell 28 are respectively connected to the differential case housing 19 through the third bearing 33 and the fourth bearing 34. The third bearing 33 and the fourth bearing 34 are preferably deep groove ball bearings.

[0037] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the inter-axle differential also includes a cover plate 20 detachably arranged at one end of the differential housing, and is placed at the end of the differential housing away from the differential assembly 11, that is, the left end shown in the figure. By arranging the cover plate 20 at the left end of the differential housing, a sealed space is formed, and the left half housing 24, the right half housing 28, the left bevel gear 25 and the right bevel gear 29 are placed in the sealed space.

[0038] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the rear drive input shaft 22 is also sleeved with a fifth bearing 35, and the end of the cover plate 20 away from the differential case housing 19, that is, the left end shown in the figure, is rotatably arranged on the fifth bearing 35, and the fifth bearing 35 is preferably a ball bearing. The end of the fifth bearing 35 away from the bevel gear shaft 32, that is, the left end shown in the figure, is also provided with a seal 36, and the outer periphery of the seal 36 abuts against the inner side of the cover plate 20. The seal 36 is preferably a sealing ring, and its material can be rubber plastic, etc., and its number can be one or more, and its function is to prevent dust and mud from entering the differential case housing 19.

[0039] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the end of the rear drive input shaft 22 away from the bevel gear shaft 32 , namely the left end shown in the figure, is also provided with a detachable rear drive input flange 23 , and a seal 36 is sleeved on the rear drive input flange 23 .

[0040] Based on the above embodiment, in another embodiment of the present invention, Figure 1As shown, the bevel gear shaft 32 is also sleeved with a double gear 16, and the six-wheel drive output shaft 9 is also provided with a six-wheel drive output gear 30. The double gear 16 meshes with the six-wheel drive output gear 30, and one end of the six-wheel drive output shaft 9 is also provided with a detachable output flange 8. During operation, the rear-drive input flange 23 transmits the torque to the rear-drive input shaft 22, thereby driving the inter-axle differential to rotate, and at the same time driving the double gear 16 and the active bevel gear 12 to rotate, the active bevel gear 12 drives the passive bevel gear 10 meshing therewith to rotate, and the double gear 16 drives the six-wheel drive output gear 30 to rotate. When the six-wheel drive output gear 30 rotates, it drives the six-wheel drive output shaft 9 to rotate, and then drives the output flange 8 to rotate, so as to realize the output of power. In addition, a rotatable second bearing 17 is also provided on the bevel gear shaft 32, and the double gear 16 is sleeved on the second bearing 17. The end of the bevel gear shaft 32 close to the active bevel gear 12, that is, the right end shown in the figure, is also provided with a first bearing 14, and the first bearing 14 is preferably a tapered bearing. The periphery of the first bearing 14 is provided with a bearing seat 13, and one side of the bearing seat 13, that is, the left side shown in the figure, is also provided with a nut 15. It should be noted that there are two second bearings 17, which are respectively arranged at the left and right ends of the bevel gear shaft 32, and a spacer is also provided between the two second bearings 17. For the second bearing 17, a needle bearing is preferably used.

[0041] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, a PTO input shaft 7 is also provided in the housing 1. The PTO input shaft 7 is arranged between the PTO output shaft 6 and the six-wheel drive output shaft 9. Both ends thereof are rotatably arranged on the housing 1 and are respectively arranged parallel to the PTO output shaft 6 and the six-wheel drive output shaft 9. A PTO input flange 31 is also provided at one end of the PTO input shaft 7.

[0042] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the PTO input shaft 7 is also provided with a fixed input tooth 37, and the PTO output shaft 6 is also provided with a PTO output tooth 2, the input tooth 37 meshes with the PTO output tooth 2, and a gear seat 4 is also provided on one side of the PTO output tooth 2, that is, the right side shown in the figure, and a coupling sleeve 5 that can move left and right is provided on the gear seat 4. During operation, when the coupling sleeve 5 is sleeved on the gear seat 4 and the PTO output tooth 2, the PTO rotates, and the gear seat 4 also rotates accordingly, thereby driving the PTO output shaft 6 to rotate together. The PTO output shaft 6 is also provided with a needle bearing 3, and the PTO output tooth 2 is placed on the needle bearing 3.

[0043] When the gearbox of the above structure is working, the rear drive input shaft 22 transmits the torque to the inter-axle differential, thereby driving the inter-axle differential to rotate, and at the same time driving the active bevel gear 12 and the six-wheel drive output shaft 9 to rotate, the active bevel gear 12 drives the passive bevel gear 10 meshing therewith to rotate, and the double gear 16 drives the six-wheel drive output gear 30 to rotate, when the six-wheel drive output gear 30 rotates, it drives the six-wheel drive output shaft 9 to rotate, and then drives the output flange 8 to rotate, so as to realize the output of power. Compared with the gearbox of the existing structure, under the action of the inter-axle differential, the problem of inconsistent rotation speeds of the rear drive input shaft 22, the six-wheel drive output shaft 9, and the active bevel gear 12 can be effectively solved, and the damage of any components can be effectively avoided, and the overall service life of the gearbox can be extended.

[0044] In addition, if Figure 2 As shown, the present invention also proposes an agricultural machine, including a gearbox, wherein the gearbox is the gearbox as described above. The agricultural machine can specifically be a six-wheel drive tractor, etc., which is not limited here. For other components of the agricultural machine, reference can be made to the related art and its improved technology, which will not be described here.

[0045] The agricultural machinery of this structure accordingly has the advantages possessed by the above-mentioned gearbox.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gearbox for agricultural machinery, characterized in that: It comprises a box body, wherein a PTO output shaft and a six-wheel drive output shaft are arranged in the box body, wherein the PTO output shaft is arranged in parallel with the six-wheel drive output shaft, wherein a passive bevel gear is further arranged on one side of the six-wheel drive output shaft, and a differential assembly is further arranged in the passive bevel gear; An inter-axle differential is also provided on one side of the differential assembly, and the inter-axle differential includes a differential case housing, a rotatable rear-drive input shaft is provided in the differential case housing, and a bevel gear shaft is provided at one end of the rear-drive input shaft close to the differential assembly, and an active bevel gear is provided on the bevel gear shaft, and the active bevel gear is meshed with the passive bevel gear; The differential housing is also provided with a left bevel gear and a right bevel gear which are arranged opposite to each other, and the left bevel gear and the right bevel gear are respectively sleeved on the bevel gear shaft; A planet shaft is also provided on one side of the bevel gear shaft. A rotatable planet gear is provided on the planet shaft. The planet gear is respectively meshed with the left bevel gear and the right bevel gear.

2. The gearbox according to claim 1, characterized in that: The inter-axle differential also includes a left half shell and a right half shell arranged in the differential case housing, the left half shell and the right half shell are arranged opposite to each other, the ends of the left half shell and the right half shell are detachably fixedly connected, and the left bevel gear and the right bevel gear are arranged in the left half shell and the right half shell.

3. The gearbox according to claim 2, characterized in that: The left half shell is also sleeved with a third bearing, and the right half shell is also sleeved with a fourth bearing. The left half shell and the right half shell are connected to the differential case housing through the third bearing and the fourth bearing respectively.

4. The gearbox according to claim 3, characterized in that: The inter-axle differential further comprises a cover plate detachably arranged at one end of the differential housing, wherein the cover plate is disposed at one end of the differential housing away from the differential assembly.

5. The gearbox according to claim 4, characterized in that: The rear drive input shaft is also sleeved with a fifth bearing, and the end of the cover plate facing away from the differential case housing is rotatably arranged on the fifth bearing; A sealing member is further provided at one end of the fifth bearing which is away from the bevel gear shaft, and the periphery of the sealing member abuts against the inner side of the cover plate.

6. The gearbox according to claim 5, characterized in that: A detachable rear-drive input flange is also provided at one end of the rear-drive input shaft away from the bevel gear shaft, and the sealing element is sleeved on the rear-drive input flange.

7. The gearbox according to claim 6, characterized in that: The bevel gear shaft is also sleeved with double teeth, the six-wheel drive output shaft is also provided with six-wheel drive output teeth, the double teeth are meshed with the six-wheel drive output teeth, and one end of the six-wheel drive output shaft is also provided with a detachable output flange.

8. The gearbox according to claim 7, characterized in that: A PTO input shaft is also provided in the housing, and the PTO input shaft is arranged between the PTO output shaft and the six-wheel drive output shaft, and is respectively arranged parallel to the PTO output shaft and the six-wheel drive output shaft. A PTO input flange is also provided at one end of the PTO input shaft.

9. The gearbox according to claim 8, characterized in that: The PTO input shaft is also provided with a fixed input tooth, the PTO output shaft is also provided with a PTO output tooth, the input tooth is meshed with the PTO output tooth, one side of the PTO output tooth is also provided with a tooth seat, and the tooth seat is provided with a movable engagement sleeve.

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

Images