A rear axle structure of a cotton picker
By designing the rear axle structure of the cotton harvester and adopting a plug-in connection and universal joint transmission, the problems of load-bearing capacity and flexible operation of the rear axle of large cotton harvesters have been solved, and precise steering control and intelligent management have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU WODE HIGH TECH AGRICULTURAL EQUIPMENT CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-24
AI Technical Summary
The rear axle of a large cotton harvester needs to bear weight, meet the power input and output requirements, and operate flexibly. Existing technology cannot meet these conditions simultaneously.
A rear axle structure for a cotton harvester was designed, including a left reduction housing, an angle sensor assembly, a left axle housing, a drive shaft, a right axle housing, a main gearbox, a gearbox, a steering cylinder, and other components. Through plug-in connections and universal joint transmission, precise control and intelligent management of the steering angle are achieved.
It effectively eliminates the hidden dangers in the connection between the frame and the rear axle, realizes precise steering control and stable operation within the limit range, and meets the intelligent control requirements of large agricultural machinery.
Smart Images
Figure CN224538842U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cotton harvester technology, and in particular to a rear axle structure for a cotton harvester. Background Technology
[0002] With the increasing mechanization of modern agriculture, some manual cotton picking work is gradually being replaced by mechanical cotton picking, and large-scale intelligent cotton harvesters that integrate harvesting and baling are particularly favored by the market. Our company has also developed large cotton harvesters. Because large cotton harvesters are large and heavy, the quality of the rear axle of the cotton harvester is particularly important. The rear axle not only bears the weight of the cotton harvester, but also needs to meet the requirements of power input and output and be flexible in operation. For this reason, our company has designed a rear axle for cotton harvesters. Utility Model Content
[0003] The present invention aims to provide a rear axle structure for a cotton harvester that overcomes or at least partially solves the above-mentioned problems.
[0004] To achieve the above objectives, the technical solution of this utility model is specifically implemented as follows:
[0005] This utility model provides a rear axle structure for a cotton harvester, including a left reduction gear housing, an angle sensor assembly, a left axle housing, a drive shaft, a right axle housing, a right reduction gear housing, a main gearbox, a gearbox, a steering cylinder, and a steering tie rod. The left and right sides of the main gearbox are respectively connected to the left and right axle housings. The left axle housing is fixedly connected to the left reduction gear housing on the left side, and the right axle housing is fixedly connected to the right reduction gear housing on the right side. A drive shaft is installed inside both the left and right axle housings. The outer shaft end of the drive shaft is plugged into the left and right reduction gear housings. An angle sensor assemblies are installed on both the left and right reduction gear housings, and the ends of the two angle sensor assemblies are respectively connected to the left and right axle housings. The front end of the main gearbox is connected to the gearbox, and a steering cylinder is also fixedly installed on the main gearbox. The left and right ends of the steering cylinder are connected to the steering tie rod through pins, and the outer ends of the steering tie rod are respectively connected to the left and right axle housings through pins.
[0006] As a further embodiment of this utility model, the left reducing housing includes a side reducing housing sticker, a planetary gear bearing, a first planetary gear, a gear bushing, a gear ring, a gear disc, a flange, a left steering knuckle, a limit adjustment screw, a side reducing bearing, a bushing, and an oil seal. A flange is fixedly installed on the right side of the side reducing housing sticker, and a left steering knuckle is provided on the right side of the flange. The flange and the left steering knuckle are connected by the side reducing bearing. The gear ring, the planetary gear bearing, and the first planetary gear are provided inside the side reducing housing sticker. The first planetary gear is sleeved on the planetary gear bearing and connected to the side reducing housing sticker through the planetary gear bearing. The first planetary gear is located inside the gear ring. A gear disc is provided on the right side of the first planetary gear, and the left part of the gear disc is located inside the gear ring. The gear disc is fixed to the left side of the left steering knuckle by the gear bushing. A limit adjustment screw is also installed on the left steering knuckle, and a bushing and an oil seal are also provided inside the left steering knuckle.
[0007] As a further embodiment of this utility model, the left reducing shell and the right reducing shell have the same structure and specifications, and are arranged symmetrically.
[0008] As a further embodiment of this utility model, the left steering knuckle is provided with a sensor connection thread for connecting and fixing the angle sensor assembly.
[0009] As a further embodiment of this utility model, a balance seat boss is fixedly installed on the upper side of the left axle housing, and a steering limit seat is fixedly installed on the front side of the left axle housing.
[0010] As a further embodiment of this utility model, the left bridge shell and the right bridge shell have the same structure and specifications, and are arranged symmetrically.
[0011] As a further embodiment of this utility model, the main gearbox includes a main reduction gearbox housing, a bevel gear shaft, and a differential. The bevel gear shaft and the differential are respectively connected inside the main reduction gearbox housing, and the bevel gear shaft is located on the left side of the differential. The differential includes a differential housing, a differential cover, a half-shaft gear, a planetary gear shaft, a planetary gear short shaft, and a second planetary gear. The differential cover is fixedly installed on the lower side of the differential housing, and a half-shaft gear is connected to the differential cover. The planetary gear shaft, the planetary gear short shaft, and the second planetary gear are also installed inside the differential housing. The planetary gear short shaft is fixedly connected to the differential housing, and the second planetary gear is installed on the planetary gear shaft. The planetary gear short shaft is located on the outside of the planetary gear shaft.
[0012] As a further embodiment of this utility model, the gearbox includes a reduction gearbox housing, a drive gear, a driven gear, and an output spline shaft. The drive gear, driven gear, and output spline shaft are disposed inside the reduction gearbox housing. The drive gear and driven gear are meshed and connected, and the driven gear is sleeved and fixed on the output spline shaft. The drive gear and the driven gear are rotatably connected inside the reduction gearbox housing. The output spline shaft is matched with the bevel gear shaft in the main gearbox.
[0013] As a further improvement of this utility model, a universal joint is provided on the drive shaft.
[0014] This utility model provides a rear axle structure for a cotton harvester, which has the following advantages: it effectively eliminates the hidden dangers caused by the connection between the frame and the rear axle, and can effectively control the steering within the limit range. The angle sensor on the left steering knuckle effectively transmits the steering angle to the PLC for centralized intelligent control, thus meeting the purpose of intelligent control of large-scale agricultural harvesting machinery. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a partial sectional view of the present invention.
[0017] Figure 2 This is a schematic diagram of the structure of this utility model.
[0018] Figure 3 This is a cross-sectional view of the left side of the casing in this utility model.
[0019] Figure 4 This is a schematic diagram of the structure of the left bridge shell in this utility model.
[0020] Figure 5 This is a schematic diagram of the transmission shaft in this utility model.
[0021] Figure 6 This is a schematic diagram of the main gearbox in this utility model.
[0022] Figure 7 This is a schematic diagram of the differential gear of this utility model.
[0023] Figure 8 This is a schematic diagram of the gearbox in this utility model.
[0024] In the diagram: 1. Left axle housing; 2. Angle sensor assembly; 3. Left axle housing; 4. Drive shaft; 5. Right axle housing; 6. Right axle housing; 7. Main gearbox; 8. Gearbox; 9. Steering cylinder; 10. Steering tie rod; 11. Side axle housing insert; 12. Planetary gear bearing; 13. Limit block; 14. First planetary gear; 15. Gear bushing; 16. Gear ring; 17. Gear disc; 18. Adjusting shim; 19. Flange; 20. Left steering knuckle; 21. Limit adjusting screw; 22. Side reducer bearing; 23. Bushing; 24. Oil seal; 31. Balance seat boss; 32. Steering limit seat; 41. Universal joint; 71. Main gearbox housing; 72. Bevel gear shaft; 73. Differential; 731. Differential housing; 732. Differential cover; 733. Half shaft gear; 734. Planetary gear shaft; 735. Planetary gear short shaft; 736. Second planetary gear; 81. Gearbox housing; 82. Driving gear; 83. Driven gear; 84. Output spline shaft. Detailed Implementation
[0025] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0026] See Figure 1-8 This utility model provides a rear axle structure for a cotton harvester, including a left reduction gear housing 1, an angle sensor assembly 2, a left axle housing 3, a drive shaft 4, a right axle housing 5, a right reduction gear housing 6, a main gearbox 7, a gearbox 8, a steering cylinder 9, and a steering tie rod 10. The left and right sides of the main gearbox 7 are respectively connected to the left axle housing 3 and the right axle housing 5. The left side of the left axle housing 3 is fixedly connected to the left reduction gear housing 1, and the right side of the right axle housing 5 is fixedly connected to the right reduction gear housing 6. A drive shaft 4 is installed inside both the left and right axle housings 3 and 5. The outer shaft end of 4 is connected to the left reducer housing 1 and the right reducer housing 6 by a plug-in connection. Angle sensor assemblies 2 are installed on both the left reducer housing 1 and the right reducer housing 6, and the ends of the two angle sensor assemblies 2 are connected to the left axle housing 3 and the right axle housing 5 respectively. The front end of the main gearbox 7 is connected to the gearbox 8, and a steering cylinder 9 is also fixedly installed on the main gearbox 7. The left and right ends of the steering cylinder 9 are connected to the steering tie rod 10 through pins, and the outer ends of the steering tie rod 10 are connected to the left axle housing 3 and the right axle housing 5 respectively through pins.
[0027] The left reducer housing 1 includes a side reducer housing 11, a planetary gear bearing 12, a first planetary gear 14, a gear bushing 15, a gear ring 16, a gear disc 17, a flange 19, a left steering knuckle 20, a limit adjusting screw 21, a side reducer bearing 22, a bushing 23, and an oil seal 24. A flange 19 is fixedly installed on the right side of the side reducer housing 11, and a left steering knuckle 20 is located on the right side of the flange 19. The flange 19 and the left steering knuckle 20 are connected by the side reducer bearing 22. The side reducer housing 11 contains the gear ring 16, the planetary gear bearing 12, and... The first planetary gear 14 is sleeved on the planetary gear bearing 12 and connected to the side reduction housing 11 through the planetary gear bearing 12. The first planetary gear 14 is located inside the gear ring 16. A gear disk 17 is provided on the right side of the first planetary gear 14, and the left part of the gear disk 17 is located inside the gear ring 16. The gear disk 17 is fixed to the left side of the left steering knuckle 20 through the gear disk bushing 15. A limit adjustment screw 21 is also installed on the left steering knuckle 20, and a bushing 23 and an oil seal 24 are also provided inside the left steering knuckle 20.
[0028] The left reducing shell 1 and the right reducing shell 6 have the same structure and specifications, and are arranged symmetrically.
[0029] The left steering knuckle 20 has a sensor connection thread for connecting and fixing the angle sensor assembly 2.
[0030] A balance seat boss 31 is fixedly installed on the upper side of the left axle housing 3, and a steering limit seat 32 is fixedly installed on the front side of the left axle housing 3.
[0031] The left axle housing 3 and the right axle housing 5 have the same structure and specifications, and are arranged symmetrically.
[0032] The main gearbox 7 includes a main reduction gearbox housing 71, a bevel gear shaft 72, and a differential 73. The bevel gear shaft 72 and the differential 73 are connected inside the main reduction gearbox housing 71, and the bevel gear shaft 72 is located on the left side of the differential 73. The differential 73 includes a differential housing 731, a differential cover 732, a half-shaft gear 733, a planetary gear shaft 734, a planetary gear short shaft 735, and a second planetary gear 736. The differential cover 732 is fixedly installed on the lower side of the differential housing 731. The half-shaft gear 733 is connected to the differential cover 732. The planetary gear shaft 734, the planetary gear short shaft 735, and the second planetary gear 736 are also installed inside the differential housing 731. The planetary gear short shaft 735 is fixedly connected to the differential housing 731. The second planetary gear 736 is installed on the planetary gear shaft 734. The planetary gear short shaft 735 is located on the outside of the planetary gear shaft 734.
[0033] The gearbox 8 includes a reduction gearbox housing 81, a drive gear 82, a driven gear 83, and an output spline shaft 84. The drive gear 82, driven gear 83, and output spline shaft 84 are arranged inside the reduction gearbox housing 81. The drive gear 82 and driven gear 83 are meshed and connected, and the driven gear 83 is sleeved and fixed on the output spline shaft 84. The drive gear 82 and the driven gear 83 are rotatably connected inside the reduction gearbox housing 81. The output spline shaft 84 is matched with the bevel gear shaft 72 in the main gearbox 7.
[0034] A universal joint 41 is provided on the drive shaft 4. A gear is provided on the left side of the drive shaft 4 and matches the first planetary gear 14; an external spline is provided on the right side and connects to the differential 73 half shaft gear 733.
[0035] During operation, this invention utilizes a three-stage reduction system formed by the gearbox 8, the main gearbox 7, and the gear pairs on the side reduction housing to achieve the required operating speed for the cotton harvester. An angle sensor on the left axle housing 3 transmits the rotation angle to the PLC for centralized intelligent control. When turning, the wheels on both sides of the rear axle rotate at different speeds, creating a speed difference. The differential 73 within the main gearbox 7 effectively resolves this issue. Steering limiters are located on both the left and right axle housings for extreme steering limits. The cotton harvester frame and rear axle are connected by a hinge shaft (non-fixed). A balance seat boss 31 is located on the axle housing. 1. Maintain a certain distance from the balance seat on the machine frame (this distance is used to release the stress generated by the machine on the rear axle; if the rear axle is fixedly connected to the machine, the stress cannot be released, and cracks or breaks are likely to occur at the connection between the rear axle and the frame, posing a safety hazard); When the steering cylinder 9 pushes the left and right steering knuckles to turn, the drive shaft 4 (insertion spline connection) automatically compensates axially (the drive shaft 4 will axially move to compensate during steering). Universal drive shafts 4 are provided in both the left and right axle housings, and universal joints 41 are provided on the drive shafts 4. When turning, the universal joints 41 can transmit power with the rotation angle; Limit blocks 13 are provided at the center position inside the left and right reduction housings 6 (to prevent transmission). When the drive shaft 4 moves axially, it directly collides with the side reduction housing, thus protecting the side reduction housing. When the rear axle is turning, the drive shaft 4 inside the axle housing will move left and right with the change of the steering knuckle. The limit block 13 is used to control the amount of left and right movement of the drive shaft 4 (adjustable) within a reasonable range. Both left and right steering knuckles are equipped with limit adjustment screws 21. When the steering angle reaches the limit value, the adjustment screws press against the steering limit to achieve the purpose of limit setting. In summary, a rear axle of the cotton harvester effectively eliminates the hidden dangers caused by the connection between the frame and the rear axle, and can effectively control the steering within the limit range (adjustable). The angle sensor on the left steering knuckle effectively transmits the steering angle to P. The LC centralized intelligent control system meets the requirements of intelligent control for modern large-scale agricultural harvesting machinery. One end of the drive shaft 4 has an external gear design (external spur gear) that matches and plugs into the first planetary gear 14, while the other end has an external spline that matches and plugs into the internal spline of the differential 73 half-shaft gear 733, facilitating assembly and installation. A universal joint 41 is provided on the upper part of the transmission for steering power transmission. Both ends of the steering cylinder 9 are equipped with tie rods and locking nuts for adjusting the stroke, facilitating cylinder stroke adjustment. The steering knuckles at both ends of the rear axle are connected to the steering cylinder 9 by steering tie rods 10 and pins, facilitating disassembly, maintenance, and installation. After multiple trial productions by our company, the design has been confirmed to be reasonable, and mass production has begun. It is worthy of promotion and use in the same industry.
[0036] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A rear axle structure for a cotton harvester, comprising a left axle housing (1), an angle sensor assembly (2), a left axle housing (3), a drive shaft (4), a right axle housing (5), a right axle housing (6), a main gearbox (7), a gearbox (8), a steering cylinder (9), and a steering tie rod (10), characterized in that, The left and right sides of the main gearbox (7) are respectively connected to a left axle housing (3) and a right axle housing (5). The left side of the left axle housing (3) is fixedly connected to a left reduction housing (1), and the right side of the right axle housing (5) is fixedly connected to a right reduction housing (6). A drive shaft (4) is installed inside both the left axle housing (3) and the right axle housing (5). The outer shaft end of the drive shaft (4) is connected to the left reduction housing (1) and the right reduction housing (6) by a plug-in connection. Angle sensor assemblies (2) are installed on the body (6), and the ends of the two angle sensor assemblies (2) are connected to the left axle housing (3) and the right axle housing (5) respectively. The front end of the main gearbox (7) is connected to the gearbox (8), and a steering cylinder (9) is also fixedly installed on the main gearbox (7). The left and right ends of the steering cylinder (9) are connected to the steering tie rod (10) through the pin shaft. The outer ends of the steering tie rod (10) are connected to the left axle housing (3) and the right axle housing (5) respectively through the pin shaft.
2. The rear axle structure of a cotton harvester according to claim 1, characterized in that, The left reducer housing (1) includes a side reducer housing (11), a planetary gear bearing (12), a first planetary gear (14), a gear bushing (15), a gear ring (16), a gear disc (17), a flange (19), a left steering knuckle (20), a limit adjusting screw (21), a side reducer bearing (22), a bushing (23), and an oil seal (24). A flange (19) is fixedly installed on the right side of the side reducer housing (11), and a left steering knuckle (20) is located on the right side of the flange (19). The flange (19) and the left steering knuckle (20) are connected by a side reducer bearing (22). The side reducer housing (11) contains a gear ring (16), a planetary gear bearing (14), a gear bushing (15), a gear ring (16), a gear disc (17), a flange (19), a left steering knuckle (20), a limit adjusting screw (21), a side reducer bearing (22), a bushing (23), and an oil seal (24). 12) and the first planetary gear (14), the first planetary gear (14) is sleeved on the planetary gear bearing (12) and connected to the side reduction shell (11) through the planetary gear bearing (12), and the first planetary gear (14) is located inside the gear ring (16). A gear disk (17) is provided on the right side of the first planetary gear (14), and the left side of the gear disk (17) is located inside the gear ring (16). The gear disk (17) is fixed to the left side of the left steering knuckle (20) through the gear disk bushing (15). A limit adjustment screw (21) is also installed on the left steering knuckle (20), and a bushing (23) and an oil seal (24) are also provided inside the left steering knuckle (20).
3. The rear axle structure of a cotton harvester according to claim 2, characterized in that, The left reducing shell (1) and the right reducing shell (6) have the same structure and specifications, and are arranged symmetrically.
4. The rear axle structure of a cotton harvester according to claim 2, characterized in that, The left steering knuckle (20) has a sensor connection thread for connecting and fixing the angle sensor assembly (2).
5. The rear axle structure of a cotton harvester according to claim 1, characterized in that, A balance seat boss (31) is fixedly installed on the upper side of the left axle housing (3), and a steering limit seat (32) is fixedly installed on the front side of the left axle housing (3).
6. The rear axle structure of a cotton harvester according to claim 5, characterized in that, The left bridge shell (3) and the right bridge shell (5) have the same structure and specifications, and are arranged symmetrically.
7. The rear axle structure of a cotton harvester according to claim 1, characterized in that, The main gearbox (7) includes a main reduction gearbox housing (71), a bevel gear shaft (72), and a differential (73). The bevel gear shaft (72) and the differential (73) are connected inside the main reduction gearbox housing (71), and the bevel gear shaft (72) is located on the left side of the differential (73). The differential (73) includes a differential housing (731), a differential cover (732), a half-shaft gear (733), a planetary gear shaft (734), a planetary gear short shaft (735), and a second planetary gear (736). A differential cover (732) is fixedly installed on the lower side of the differential housing (731). A half-shaft gear (733) is connected to the differential cover (732). A planetary gear shaft (734), a planetary gear short shaft (735), and a second planetary gear (736) are also installed inside the differential housing (731). The planetary gear short shaft (735) is fixedly connected to the differential housing (731). The second planetary gear (736) is installed on the planetary gear shaft (734). The planetary gear short shaft (735) is located on the outside of the planetary gear shaft (734).
8. The rear axle structure of a cotton harvester according to claim 7, characterized in that, The gearbox (8) includes a gearbox housing (81), a drive gear (82), a driven gear (83), and an output spline shaft (84). The gearbox housing (81) is provided with a drive gear (82), a driven gear (83), and an output spline shaft (84). The drive gear (82) meshes with the driven gear (83), and the driven gear (83) is sleeved and fixed on the output spline shaft (84). The drive gear (82) and the driven gear (83) are rotatably connected inside the gearbox housing (81). The output spline shaft (84) is matched with the bevel gear shaft (72) in the main gearbox (7).
9. The rear axle structure of a cotton harvester according to claim 1, characterized in that, The drive shaft (4) is equipped with a universal joint (41).