Gearbox and agricultural machine
By introducing the PTO output shaft, six-wheel drive output shaft and differential assembly into the gearbox, and using the inter-axle differential to adjust the speed consistency, the problem of inconsistent speed in the six-wheel drive structure is solved, component damage is avoided, and the service life of the gearbox is extended.
Patent Information
- Application Number
- CN202422855383.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the existing six-wheel drive gearbox, the rotational speeds of the rear-wheel drive input shaft, the six-wheel drive output shaft and the active bevel gear are inconsistent, resulting in drive asynchrony and damage to transmission system components.
A gearbox structure is designed, including a PTO output shaft, a six-wheel drive output shaft, a differential assembly, an inter-axle differential, and bevel gear meshing. The inter-axle differential is used to adjust the speed consistency and avoid component damage.
It effectively solves the problem of inconsistent speed, avoids component damage, and extends the service life of the gearbox.
Smart Images
Figure CN223344605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of agricultural machinery, 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 used to change the power and torque from the engine and is an important component of agricultural machinery. Agricultural machinery, such as tractors, are common, including a variety of drive forms such as two-wheel drive, four-wheel drive and six-wheel drive, and the corresponding gearbox structures also vary greatly. In the current gearbox with a six-wheel drive structure, 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 drive asynchrony, thereby 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. Utility Model Content
[0005] The technical problem to be solved by the utility model 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 utility model is achieved as follows: The present utility model proposes a gearbox for agricultural machinery, comprising a housing, wherein a PTO output shaft and a six-wheel drive output shaft are provided in the housing, the PTO output shaft is arranged parallel to the six-wheel drive output shaft, a passive bevel gear is further provided on one side of the six-wheel drive output shaft, and a differential assembly is further provided in the passive bevel gear; an inter-axle differential is further provided on one side of the differential assembly, and the inter-axle differential comprises a differential case housing, a rotatable rear-drive input shaft is provided in the differential case housing, an end of the rear-drive input shaft close to the differential assembly is provided with a bevel gear shaft, an active bevel gear is provided 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 arranged opposite to each other are further provided in the differential case housing, the left bevel gear and the right bevel gear are respectively sleeved on the bevel gear shaft; a planetary shaft is further provided on one side of the bevel gear shaft, a rotatable planetary gear is provided on the planetary shaft, and the planetary gear is respectively meshed with the left bevel gear and the right bevel gear. During operation, this transmission structure transmits torque from the rear-wheel drive input shaft to the inter-axle differential, which in turn drives the inter-axle differential, simultaneously driving the active bevel gear and the six-wheel drive output shaft to achieve torque output. Compared to existing transmissions, the inter-axle differential effectively resolves the problem of inconsistent speeds among the rear-wheel drive input shaft, the six-wheel drive output shaft, and the active bevel gear, effectively preventing damage to any components and extending the overall service life of the transmission.
[0007] Another technical solution of the present utility model is that, based on 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 utility model is that, based on the above, a third bearing is further provided on the left half shell, and a fourth bearing is further provided on the right half shell, and the left half shell and the right half shell are connected to the differential case shell through the third bearing and the fourth bearing respectively.
[0009] Another technical solution of the present invention is that, based on the above, the inter-axle differential further comprises a cover plate detachably arranged on one end of the differential case housing, and the cover plate is placed on the end of the differential case housing away from the differential assembly.
[0010] Another technical solution of the present utility model is that, based on the above, a fifth bearing is further provided on the rear-drive input shaft, and the end of the cover plate facing away from the differential case housing is rotatably arranged on the fifth bearing; the end of the fifth bearing facing 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, based on 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 member is sleeved on the rear-drive input flange.
[0012] Another technical solution of the present invention is that, based on the above, a double tooth is further provided on the bevel gear shaft, and a six-wheel drive output tooth is further provided on the six-wheel drive output shaft. The double tooth is engaged 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 box body, 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, based on 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 engaged with the PTO output tooth, and a tooth seat is further provided on one side of the PTO output tooth, and a movable coupling sleeve is provided on the tooth seat.
[0015] On the other hand, the present invention also 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 illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.
[0017] Figure 1 This is a schematic structural diagram of a gearbox of the present invention;
[0018] Figure 2 The utility model is a structural schematic diagram of an agricultural machinery.
[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] 31 PTO input flange 32 Bevel gear shaft 33 Third 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 section is merely 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 combine the features in the embodiments and different embodiments of the present invention accordingly based on the description of this document.
[0034] The embodiments of the present invention are as follows, see Figures 1 to 2The gearbox and agricultural machinery shown in the figure, specifically, include a gearbox 1, in which a PTO output shaft 6 and a six-wheel drive output shaft 9 are provided. The PTO output shaft is arranged parallel to the six-wheel drive output shaft 9. A passive bevel gear 10 is provided on one side of the six-wheel drive output shaft 9, that is, on the lower side as shown in the figure. A differential assembly 11 is also provided in the passive bevel gear 10. An inter-axle differential is also provided on one side of the differential assembly 11, that is, on the left side as shown in the figure. The inter-axle differential specifically includes a differential case housing 19. A rotatable rear-wheel drive input shaft 22 is provided in the differential case housing 19. The rear-wheel drive input shaft 22 is provided with a bevel gear shaft 32 near one end of the differential assembly 11, that is, on the right end as shown in the figure. A copper sleeve 21 is also provided between the bevel gear shaft 32 and the rear-wheel drive input shaft 22. An active bevel gear 12 is provided on the bevel gear shaft 32, and the active bevel gear 12 meshes with the passive bevel gear 10. The differential housing also includes oppositely positioned left and right bevel gears 25 and 29. These gears have identical structures and are respectively sleeved onto a bevel gear shaft 32. A planetary shaft 27 is provided on one side of the bevel gear shaft 32 (i.e., the upper or lower side, or both sides, as shown in the figure). Rotatable planetary gears 26 are mounted on the planetary shaft 27, and these planetary gears 26 engage with the left and right bevel gears 25 and 29, respectively. In this transmission, when operating, the rear-drive input shaft 22 transmits torque to the inter-axle differential, thereby rotating the inter-axle differential and, in turn, driving the active bevel gear 12 and the six-wheel drive output shaft 9 to achieve torque output. Compared to existing transmissions, the inter-axle differential effectively resolves the problem of inconsistent rotational speeds among the rear-drive input shaft 22, the six-wheel drive output shaft 9, and the active bevel gear 12, effectively preventing damage to any components and extending the overall service life of the transmission.
[0035] On the basis of the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the inter-axle differential further includes a left half-shell 24 and a right half-shell 28 disposed within the differential case housing 19. The left half-shell 24 and the right half-shell 28 are disposed opposite each other, and the ends of the left half-shell 24 and the right half-shell 28 are detachably fixedly connected. The left bevel gear 25 and the right bevel gear 29 are disposed within the left half-shell 24 and the right half-shell 28. Specifically, the upper end or the lower end, or both 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 within the connecting holes to connect the left half-shell 24 and the right half-shell 28 together. The connecting holes are preferably screw holes, and the connecting members are preferably bolts.
[0036] On the basis of the above embodiment, in another embodiment of the present invention, Figure 1As shown, the left half housing 24 is further provided with a third bearing 33, and the right half housing 28 is further provided with a fourth bearing 34. The left half housing 24 and the right half housing 28 are connected to the differential case 19 via the third bearing 33 and the fourth bearing 34, respectively. The third bearing 33 and the fourth bearing 34 are preferably deep groove ball bearings.
[0037] On the basis of 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 mounted on one end of the differential housing, located at the end of the differential housing facing away from the differential assembly 11, i.e., the left end as shown in the figure. The installation of the cover plate 20 at the left end of the differential housing forms a sealed space within which the left and right housing halves 24 and 28, as well as the left and right bevel gears 25 and 29, are located.
[0038] On the basis of 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. The cover plate 20, at the end facing away from the differential case housing 19 (i.e., the left end shown in the figure), is rotatably mounted on the fifth bearing 35. The fifth bearing 35 is preferably a ball bearing. A seal 36 is also provided at the end of the fifth bearing 35 facing away from the bevel gear shaft 32 (i.e., the left end shown in the figure). 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 made of a material such as rubber or plastic. There can be one or more seals. Its function is to prevent dust and mud from entering the differential case housing 19.
[0039] On the basis of 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 , that is, the left end shown in the figure, is further provided with a detachable rear drive input flange 23 , and a seal 36 is sleeved on the rear drive input flange 23 .
[0040] On the basis of the above embodiment, in another embodiment of the present invention, Figure 1As shown, the bevel gear shaft 32 is also fitted with a duplex gear 16, and the six-wheel drive output shaft 9 is also fitted with a six-wheel drive output gear 30. The duplex 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 removable output flange 8. During operation, the rear-drive input flange 23 transmits torque to the rear-drive input shaft 22, thereby driving the inter-axle differential and simultaneously rotating the duplex gear 16 and the active bevel gear 12. The active bevel gear 12 rotates the meshing passive bevel gear 10, which in turn rotates the duplex gear 16, which in turn rotates the six-wheel drive output gear 30. The rotation of the six-wheel drive output gear 30 rotates the six-wheel drive output shaft 9, which in turn rotates the output flange 8, achieving power output. Furthermore, the bevel gear shaft 32 is provided with a rotatable second bearing 17, on which the duplex gear 16 is mounted. A first bearing 14 is also provided on the end of the bevel gear shaft 32 closest to the active bevel gear 12 (i.e., the right end shown in the figure). The first bearing 14 is preferably a tapered bearing. A bearing seat 13 is provided around the periphery of the first bearing 14. A nut 15 is also provided on one side of the bearing seat 13 (i.e., the left side shown in the figure). It should be noted that there are two second bearings 17, one on each end of the bevel gear shaft 32. A spacer sleeve is provided between the two second bearings 17. The second bearings 17 are preferably needle roller bearings.
[0041] On the basis of the above embodiment, in another embodiment of the present invention, Figure 1 As shown, a PTO input shaft 7 is also provided in the box body 1. The PTO input shaft 7 is arranged between the PTO output shaft 6 and the six-wheel drive output shaft 9. Its two ends are rotatably arranged on the box body 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] On the basis of the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the PTO input shaft 7 is also equipped with a fixed input tooth 37, and the PTO output shaft 6 is also equipped with a PTO output tooth 2. The input tooth 37 meshes with the PTO output tooth 2. On one side of the PTO output tooth 2, that is, the right side as shown in the figure, is a gear holder 4, which is equipped with a movable engagement sleeve 5. During operation, when the engagement sleeve 5 is mounted on the gear holder 4 and the PTO output tooth 2, the PTO rotates, and the gear holder 4 also rotates, which in turn drives the PTO output shaft 6 to rotate. The PTO output shaft 6 is also equipped with a needle roller bearing 3, and the PTO output tooth 2 is placed on this needle roller bearing 3.
[0043] During operation, the transmission with the aforementioned structure transmits torque to the inter-axle differential, thereby driving the inter-axle differential to rotate. This in turn drives the active bevel gears 12 and the six-wheel drive output shaft 9. The active bevel gears 12 then rotate the meshing passive bevel gears 10, while the duplex gears 16 in turn rotate the six-wheel drive output gears 30. The rotation of the six-wheel drive output gears 30 drives the six-wheel drive output shaft 9, which in turn drives the output flange 8 to achieve power output. Compared to existing transmissions, the inter-axle differential effectively resolves the problem of inconsistent rotational speeds among the rear-drive input shaft 22, the six-wheel drive output shaft 9, and the active bevel gears 12, effectively preventing damage to any components and extending the overall service life of the transmission.
[0044] In addition, if Figure 2 As shown, the present invention also provides an agricultural machine including a gearbox, wherein the gearbox is the gearbox described above. The agricultural machine may specifically be a six-wheel drive tractor, etc., without limitation herein. For other components of the agricultural machine, reference may be made to the related and improved technologies, which will not be described in detail here.
[0045] The agricultural machinery of this structure accordingly has the advantages of 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A gearbox for agricultural machinery, characterized in that: The invention comprises a housing, wherein a PTO output shaft and a six-wheel drive output shaft are arranged in the housing, wherein the PTO output shaft is arranged in parallel with the six-wheel drive output shaft, a passive bevel gear is further provided on one side of the six-wheel drive output shaft, and a differential assembly is further provided in the passive bevel gear; An inter-axle differential is further 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 the bevel gear shaft is provided with active bevel gears, and the active bevel gears mesh with the passive bevel gears; The differential case housing is further provided with a left bevel gear and a right bevel gear 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 further provided on one side of the bevel gear shaft. Rotatable planet gears are provided on the planet shaft. The planet gears are respectively engaged 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 provided with a third bearing, and the right half shell is also provided with a fourth bearing. The left half shell and the right half shell are connected to the differential case 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 on one end of the differential case housing, wherein the cover plate is placed on an end of the differential case housing away from the differential assembly.
5. The gearbox according to claim 4, characterized in that: The rear drive input shaft is also provided with a fifth bearing, and the end of the cover plate facing away from the differential case housing is rotatably provided on the fifth bearing; A sealing member is further provided on one end of the fifth bearing 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 further provided at one end of the rear-drive input shaft away from the bevel gear shaft, and the sealing member is sleeved on the rear-drive input flange.
7. The gearbox according to claim 6, characterized in that The bevel gear shaft is also provided with a double gear, and the six-wheel drive output shaft is also provided with a six-wheel drive output gear. The double gear is engaged with the six-wheel drive output gear, 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 box body. 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 further provided with a fixed input tooth, and the PTO output shaft is further provided with a PTO output tooth, the input tooth meshing with the PTO output tooth, and a tooth seat is further provided on one side of the PTO output tooth, and a movable coupling sleeve is provided on the tooth seat.
10. An agricultural machine comprising a gearbox, characterized in that: The gearbox is the gearbox according to any one of claims 1 to 9.