Rear drive axle assembly of three-stage reduction tractor

Abstract

The utility model discloses a rear drive axle assembly of a three-stage speed reduction tractor. The rear drive axle assembly comprises a main speed reducer assembly and a rear axle shell arranged on the left side of the main speed reducer assembly. A hub brake disc assembly is installed on the left side of the rear axle shell, a gear ring supporting assembly, a front-stage planet carrier assembly and a rear-stage planet carrier assembly are arranged on the inner side of the hub brake disc assembly, and an end cover is installed at the end of the hub brake disc assembly. A short half shaft is installed in the hub brake disc assembly in a penetrating mode, one end of the short half shaft is connected with the front-stage sun gear, and the other end of the short half shaft is connected with the long half shaft. According to the three-stage speed reduction tractor, the rear drive axle assembly, the main speed reducer assembly and the rear axle shell are fixed through the first bolt, and the first flat washer is connected to the first bolt, so that the first bolt can be limited through the first flat washer, the friction force at the joint is increased, and the loosening phenomenon is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor rear drive axles, in particular to a three-stage reduction tractor rear drive axle assembly. Background Art

[0002] There are many types of tractors, the most common of which are agricultural tractors, which are used to transport crops. In the use of tractors, the role of the rear drive axle is particularly important. It is an important component connecting the drive wheels and the frame, and is used to improve the traction and suspension performance of the tractor.

[0003] For example, the publication number CN116985628A discloses a tractor rear drive axle assembly and a tractor, wherein a differential assembly is installed inside the drive axle housing; a wheel-side reduction gearbox is arranged outside the drive axle housing, and the wheel-side reduction gearbox is connected to the differential assembly through a half-shaft; a wet brake assembly is arranged inside the drive axle housing; a hydraulic electronic control system is arranged on the drive axle housing; one end of the precision lubrication system is connected to the hydraulic electronic control system, and the other end is respectively connected to the wet brake assembly and the differential assembly; a lubricating oil channel connected to the wet brake assembly and the differential assembly is provided on the drive axle housing. The present invention adopts a modular design, which can be independent of the main gearbox of the tractor as a whole, and all parts prone to failure are integrated outside the housing, which can realize rapid diagnosis and repair of failures. The internal wearing parts adopt forced and precise lubrication control, combined with splash and immersion lubrication, which can effectively avoid failures of internal parts caused by poor lubrication;

[0004] However, the tractor rear drive axle in the above application still has some shortcomings during use. For example, after long-term use, the rear axle housing and the reducer assembly are prone to loosening, and the connection cannot be reinforced, which affects the overall stability and reduces the use effect of the tractor rear drive axle. Therefore, we propose a three-stage reduction tractor rear drive axle assembly to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a three-stage reduction tractor rear drive axle assembly to solve the problem raised in the above-mentioned background technology that the reduction tractor rear drive axle assembly currently on the market is prone to loosening between the rear axle housing and the reducer assembly when used for a long time, and the connection cannot be reinforced, thereby affecting the overall stability and reducing the use effect of the tractor rear drive axle.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a three-stage reduction tractor rear drive axle assembly, comprising a main reducer assembly and a rear axle housing arranged on the left side of the main reducer assembly;

[0007] Also includes:

[0008] A wheel hub brake disc assembly is installed on the left side of the rear axle housing, and a gear ring support assembly, a front stage planetary carrier assembly and a rear stage planetary carrier assembly are provided on the inner side of the wheel hub brake disc assembly, and an end cover is installed at the end of the wheel hub brake disc assembly;

[0009] A short half shaft is installed through the interior of the hub brake disc assembly, and one end of the short half shaft is connected to the front stage sun gear, and the other end of the short half shaft is connected to the long half shaft;

[0010] A brake assembly is installed on the outer wall of the rear axle housing, and the brake assembly and the rear axle housing are fixed by brake connecting bolts. A return spring bracket is provided on the outer wall of the main reducer assembly, and a return spring is installed on the return spring bracket. A planetary carrier connecting bolt is also installed on the hub brake disc assembly, and a rim nut assembly is provided on the hub brake disc assembly. A vent plug assembly is provided on the main reducer assembly, and a block is provided on the left side of the front-stage sun gear.

[0011] Preferably, the rear axle housing and the main reducer assembly are fixed by a first bolt, and a first flat washer is connected to the first bolt.

[0012] Preferably, the end cover and the wheel hub brake disc assembly are connected by a second bolt, and a second flat washer is connected to the second bolt.

[0013] Preferably, a second screw plug is further provided on the end cover, and a third screw plug is provided between the end cover and the wheel hub brake disc assembly.

[0014] Preferably, a shaft tube locking nut is installed between the short half shaft and the front-stage sun gear, and a shaft tube nut locking ring is provided on the shaft tube locking nut.

[0015] Preferably, a shaft tube nut washer is provided between the short half shaft and the wheel hub brake disc assembly, and a shaft tube nut adjustment pad is provided on the inner side of the shaft tube nut washer.

[0016] Preferably, a first screw plug is further provided on the inner side of the main reducer assembly, and a magnet is installed on the inner side of the first screw plug, and a shaft elastic retaining ring and a shaft wire retaining ring are provided on the outer side of the short half shaft.

[0017] Compared with the prior art, the beneficial effect of the present invention is that the three-stage reduction tractor rear drive axle assembly can make the connection between the main reducer assembly and the rear axle housing more secure by providing the first bolt between the main reducer assembly and the rear axle housing, as shown in the following:

[0018] (1) The main reducer assembly and the rear axle housing are fixed by a first bolt, and a first flat washer is connected to the first bolt, so that the first bolt can be limited by the first flat washer, thereby increasing the friction force at the connection and effectively preventing loosening;

[0019] Furthermore, the end cover and the wheel hub brake disc assembly are connected by a second bolt, and a second flat washer is connected to the second bolt, which can make the connection between the end cover and the wheel hub brake disc assembly more secure and improve stability during use;

[0020] Furthermore, a second screw plug is provided on the end cover, and a third screw plug is provided between the end cover and the wheel hub brake disc assembly, which ensures the firmness of the end cover during use and effectively prevents the end cover from loosening during use;

[0021] (2) A shaft tube locking nut is installed between the short half shaft and the front stage sun gear, and a shaft tube nut locking ring is provided on the shaft tube locking nut, so that the connection between the short half shaft and the front stage sun gear can be more firmly connected, thereby ensuring the normal operation of the drive;

[0022] Furthermore, an axle tube nut washer is provided between the short half shaft and the wheel hub brake disc assembly, and an axle tube nut adjustment pad is provided on the inner side of the axle tube nut washer, which can ensure a firm connection between the short half shaft and the wheel hub brake disc assembly and prevent them from falling off or loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall main cross-sectional structure of the utility model;

[0024] Figure 2 This is a schematic side cross-sectional view of the wheel hub brake disc assembly of the present invention;

[0025] Figure 3 This is a schematic diagram of the side cross-section structure of the main reducer assembly of the utility model;

[0026] Figure 4 This is a schematic diagram of the overall top-sectional structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure between the main reducer assembly and the long half-shaft of the utility model;

[0028] Figure 6 This is a schematic structural diagram of the second flat washer of the present utility model.

[0029] Figure: 1. Main reducer assembly; 2. Rear axle housing; 3. Hub brake disc assembly; 4. Ring gear support assembly; 5. Front planetary carrier assembly; 6. Rear planetary carrier assembly; 7. End cover; 8. Front sun gear; 9. Short half shaft; 10. Brake assembly; 11. Brake connecting bolts; 12. Long half shaft; 13. Return spring bracket; 14. Return spring; 15. Planetary carrier connecting bolts; 16. Axle tube locking screw Nut; 17. Shaft tube nut lock ring; 18. Rim nut assembly; 19. Shaft tube nut washer; 20. Shaft tube nut adjustment washer; 21. First screw plug; 22. Magnet; 23. Breather plug assembly; 24. Stopper; 25. Second screw plug; 26. Third screw plug; 27. First bolt; 28. First flat washer; 29. Second bolt; 30. Second flat washer; 31. Shaft elastic retaining ring; 32. Shaft wire retaining ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1:

[0032] In this embodiment, the connection between the main reducer assembly 1 and the rear axle housing 2 is disclosed, which can make it more secure during later use. Figure 4 As shown:

[0033] A rear axle housing 2 is provided on the left side of the final reducer assembly 1. The rear axle housing 2 and the final reducer assembly 1 are fixed together by a first bolt 27, and a first flat washer 28 is connected to the first bolt 27. A short half shaft 9 is installed through the interior of the hub brake disc assembly 3, and one end of the short half shaft 9 is connected to the front-stage sun gear 8, and the other end of the short half shaft 9 is connected to the long half shaft 12.

[0034] When using the rear drive axle assembly of the three-stage reduction tractor, first place the main reducer assembly 1 in the corresponding position, and then connect the rear axle housing 2 and the main reducer assembly 1, wherein the rear axle housing 2 and the main reducer assembly 1 are fixed by a first bolt 27, and a first flat washer 28 is provided at the connection of the first bolt 27, so that the connection of the first bolt 27 can be tightened, thereby making the connection between the rear axle housing 2 and the main reducer assembly 1 more firm, effectively preventing loosening during later use. Because a long semi-shaft 12 is provided on the inner side of the rear axle housing 2, and the end of the long semi-shaft 12 is connected to the short semi-shaft 9, when the long semi-shaft 12 rotates later, the short semi-shaft 9 can be driven to rotate.

[0035] Example 2:

[0036] In this embodiment, the position limiting of the end cap 7 is disclosed, which can make the end cap 7 more secure when in use. Figure 1-Figure 2 As shown:

[0037] A hub brake disc assembly 3 is installed on the left side of the rear axle housing 2, and a ring gear support assembly 4, a front-stage planetary carrier assembly 5, and a rear-stage planetary carrier assembly 6 are provided on the inner side of the hub brake disc assembly 3. An end cover 7 is installed at the end of the hub brake disc assembly 3.

[0038] A brake assembly 10 is mounted on the outer wall of the rear axle housing 2, and the brake assembly 10 and the rear axle housing 2 are fixed together by brake connecting bolts 11. A return spring bracket 13 is provided on the outer wall of the final reducer assembly 1, and a return spring 14 is mounted on the return spring bracket 13. A planet carrier connecting bolt 15 is also mounted on the hub brake disc assembly 3, and a rim nut assembly 18 is provided on the hub brake disc assembly 3.

[0039] The end cover 7 and the wheel hub brake disc assembly 3 are connected by a second bolt 29, and the second flat washer 30 is connected to the second bolt 29. A second screw plug 25 is also provided on the end cover 7. A third screw plug 26 is provided between the end cover 7 and the wheel hub brake disc assembly 3. A shaft tube locking nut 16 is installed between the short half shaft 9 and the front-stage sun gear 8, and a shaft tube nut locking ring 17 is provided on the shaft tube locking nut 16. A shaft tube nut washer 19 is provided between the short half shaft 9 and the wheel hub brake disc assembly 3, and a shaft tube nut adjustment washer 20 is provided on the inner side of the shaft tube nut washer 19;

[0040] The rear axle housing 2 and the wheel hub brake disc assembly 3 are connected, and then the rear axle housing 2 and the brake assembly 10 are fixed by the brake connecting bolts 11 to ensure the firmness of the brake assembly 10 when in use. A front-stage sun gear 8 is provided on the inner side of the wheel hub brake disc assembly 3, and the front-stage sun gear 8 and the short half shaft 9 are fixed, so when the short half shaft 9 rotates, it will drive the front-stage sun gear 8 to rotate, and an end cover 7 is provided at the end of the wheel hub brake disc assembly 3, and the end cover 7 and the wheel hub brake disc assembly 3 are fixed by a second bolt 29, and a second flat washer 30 is provided at the connection of the second bolt 29, so under the action of the second flat washer 30, the second bolt 29 can be connected more tightly.

[0041] Example 3:

[0042] In this embodiment, the short half shaft 9 is protected by the shaft elastic retaining ring 31 and the shaft wire retaining ring 32. Figure 3 、 Figure 5-Figure 6 As shown:

[0043] A vent plug assembly 23 is provided on the main reducer assembly 1, a block 24 is provided on the left side of the front-stage sun gear 8, a first screw plug 21 is further provided on the inner side of the main reducer assembly 1, and a magnet 22 is installed on the inner side of the first screw plug 21, and a shaft elastic retaining ring 31 and a shaft wire retaining ring 32 are provided on the outer side of the short half shaft 9;

[0044] The outside of the short half shaft 9 is provided with a shaft elastic retaining ring 31 and a shaft wire retaining ring 32. In this way, when the short half shaft 9 rotates, the short half shaft 9 will be protected by the shaft elastic retaining ring 31 and the shaft wire retaining ring 32 to ensure the normal rotation of the short half shaft 9. A vent plug assembly 23 is also provided on the main reducer assembly 1. In this way, during use, the air flow can be circulated through the vent plug assembly 23 to ensure the normal exhaust work. The above is the working process of the entire device. The contents not described in detail in this manual belong to the existing technology known to professional and technical personnel in this field.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-stage reduction tractor rear drive axle assembly, comprising a main reducer assembly (1) and a rear axle housing (2) arranged on the left side of the main reducer assembly (1); It is characterized by: Also includes: A wheel hub brake disc assembly (3) is installed on the left side of the rear axle housing (2), and a gear ring support assembly (4), a front-stage planetary carrier assembly (5) and a rear-stage planetary carrier assembly (6) are provided on the inner side of the wheel hub brake disc assembly (3), and an end cover (7) is installed at the end of the wheel hub brake disc assembly (3); A short half shaft (9) is installed through the interior of the wheel hub brake disc assembly (3), and one end of the short half shaft (9) is connected to the front-stage sun gear (8), and the other end of the short half shaft (9) is connected to the long half shaft (12); The outer wall of the rear axle housing (2) is provided with a brake assembly (10), and the brake assembly (10) and the rear axle housing (2) are fixed to each other via brake connecting bolts (11); the outer wall of the main reducer assembly (1) is provided with a return spring bracket (13), and the return spring bracket (13) is provided with a return spring (14); the wheel hub brake disc assembly (3) is also provided with a planetary carrier connecting bolt (15); the wheel hub brake disc assembly (3) is provided with a rim nut assembly (18); the main reducer assembly (1) is provided with a vent plug assembly (23); and a stopper (24) is provided on the left side of the front-stage sun gear (8).

2. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: The rear axle housing (2) and the main reducer assembly (1) are fixed via a first bolt (27), and a first flat washer (28) is connected to the first bolt (27).

3. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: The end cover (7) and the wheel hub brake disc assembly (3) are connected via a second bolt (29), and a second flat washer (30) is connected to the second bolt (29).

4. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: A second screw plug (25) is also provided on the end cover (7), and a third screw plug (26) is provided between the end cover (7) and the wheel hub brake disc assembly (3).

5. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: A shaft tube locking nut (16) is installed between the short half shaft (9) and the front stage sun gear (8), and a shaft tube nut locking ring (17) is provided on the shaft tube locking nut (16).

6. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: A shaft tube nut washer (19) is provided between the short half shaft (9) and the wheel hub brake disc assembly (3), and a shaft tube nut adjustment pad (20) is provided on the inner side of the shaft tube nut washer (19).

7. The three-stage reduction tractor rear drive axle assembly according to claim 1, characterized in that: A first screw plug (21) is further provided on the inner side of the main reducer assembly (1), and a magnet (22) is installed on the inner side of the first screw plug (21). A shaft elastic retaining ring (31) and a shaft wire retaining ring (32) are provided on the outer side of the short half shaft (9).

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