Miniature hydraulic rear drive axle structure

Abstract

The utility model discloses a miniature hydraulic rear drive axle structure which comprises a right axle housing, a left axle housing and a main reducer housing assembly, a housing assembly is assembled at the upper end of the main reducer housing assembly and comprises a front housing and a rear housing which are arranged in pairs through bolts and cylindrical pins, and the upper portion of the main reducer housing assembly is connected with the rear housing through bolts. A driving spiral bevel gear is rotationally arranged on the inner side between the front shell and the rear shell through a bearing, a driven gear is fixedly arranged at the upper end of the driving spiral bevel gear through a locking nut, and a driving gear is arranged on the side face of the driven gear and on the inner side of the front shell in a meshed mode. And the device is suitable for narrow environment operation, hydraulic motor overload protection and more stable power transmission.

Description

Technical Field

[0001] This utility model relates to the field of drive axle technology, specifically a miniature hydraulic rear drive axle structure. Background Technology

[0002] As competition intensifies in the domestic construction machinery industry, customers are not only demanding higher loading efficiency from loaders, but also paying more attention to their application scenarios. Urban construction and agricultural needs are driving the development of mini and compact loaders, pushing drive axles towards lightweight and differentiated designs. Currently, existing drive axles are relatively large, have high requirements for working areas, and are more suitable for open spaces due to environmental limitations. Their main application scenarios are limited, primarily in mining and construction.

[0003] Therefore, the inventors sought to solve the problem of designing a compact, lightweight drive axle that would reduce costs, be suitable for operation in confined spaces, and be powered by a hydraulic motor. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a miniature hydraulic rear drive axle structure that achieves a compact and lightweight design, thereby reducing costs. It is suitable for operation in confined spaces and features a hydraulic motor providing power.

[0005] The technical solution adopted by this utility model device is: a miniature hydraulic rear drive axle structure, which includes a right axle housing, a left axle housing, and a main reduction housing assembly. A housing assembly is mounted on the upper end of the main reduction housing assembly. The housing assembly includes a front housing and a rear housing connected by bolts and cylindrical pins. The upper part of the main reduction housing assembly is connected to the rear housing by bolts. A driving spiral bevel gear is rotatably mounted on the inner side of the front and rear housings via bearings. A driven gear is fixed to the upper end of the driving spiral bevel gear by a lock nut. A driving gear is meshed on the side of the driven gear and inside the front housing. The driving gear is rotatably mounted to the front and rear housings via deep groove ball bearings. A plastic dust cover is provided on the inner upper end of the rear housing. The lower part of the driving spiral bevel gear is rotatably mounted to the main reduction housing assembly via bearings. The right end of the main reduction housing assembly is connected by bolts. The system is equipped with an axle housing connecting plate. A right axle housing is bolted to the right end of the axle housing connecting plate, and a left axle housing is bolted to the left end of the main reduction housing assembly. A differential assembly is located inside the main reduction housing assembly. A left and right half-shaft are mounted at both ends of the differential assembly. A driven spiral bevel gear is fixedly mounted on the outer side of the right half-shaft, meshing with a driving spiral bevel gear. Adjusting nuts are located between the inner sides of both ends of the main reduction housing assembly and the differential assembly. Wheel hubs are mounted at the ends of both the left and right axle housings via bearings. Wheel rim assemblies are mounted at the ends of the wheel hubs via rim bolts and rim nuts. An internal gear ring is mounted on the inner side between the wheel rim assembly and the wheel hub. Sun gears are connected to the ends of both the left and right half-shafts via half-shaft connecting sleeves, meshing with the internal gear ring.

[0006] Furthermore, the two wheel hubs are rotatably configured with respect to the left and right axle housings, respectively.

[0007] Furthermore, the drive gear is connected to a hydraulic motor via a drive shaft.

[0008] Furthermore, both the left and right axle housings are provided with connecting plates with mounting holes on their sides.

[0009] Furthermore, the internal gear ring is fixedly connected to the wheel rim assembly.

[0010] Furthermore, the free space ratio inside the left axle housing and the right axle housing is 20%-27%, the free space ratio inside the main reduction housing is 30%-35%, and the free space ratio inside the housing assembly is 30%-35%.

[0011] Furthermore, the distance between the ends of the wheel rim assemblies is less than 1200mm.

[0012] The beneficial effects of this utility model device are:

[0013] 1. This utility model adopts a compact structural design. The reasonable external structure compresses a large amount of useless internal space, reduces the amount of manufacturing materials, and limits the size within a certain range, thereby reducing the overall volume and size of the structure, achieving a compact and lightweight structure, thus reducing costs and making it suitable for operation in confined environments.

[0014] 2. This utility model uses a hydraulic motor as a power source and adopts a two-stage reduction principle to achieve overload protection for the hydraulic motor and more stable power transmission. Attached Figure Description

[0015] Figure 1 This is a structural view of the present invention.

[0016] Explanation of reference numerals in the attached diagram: 1. Right axle housing; 2. Right half-shaft; 3. Adjusting nut; 4. Driven spiral bevel gear; 5. Axle housing connecting disc; 6. Driven spiral bevel gear; 7. Differential assembly; 8. Main reduction housing assembly; 9. Left half-shaft; 10. Half-shaft connecting sleeve; 11. Wheel hub; 12. Internal gear ring; 13. Sun gear; 14. Wheel rim assembly; 15. Wheel rim bolt; 16. Wheel rim nut; 17. Left axle housing; 18. Rear housing; 19. Front housing; 20. Plastic dust cover; 21. Deep groove ball bearing; 22. Driven gear; 23. Lock nut; 24. Cylindrical pin; 25. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0018] Example 1: See Figure 1This is a structural view of the present invention, a miniature hydraulic rear drive axle structure, which includes a right axle housing 1, a left axle housing 17, and a main reduction housing assembly 8. A housing assembly is mounted on the upper end of the main reduction housing assembly 8. The housing assembly includes a front housing 19 and a rear housing 18, which are connected by bolts and cylindrical pins 25. The upper part of the main reduction housing assembly 8 is connected to the rear housing 18 by bolts. A drive spiral bevel gear 4 is rotatably mounted on the inner side between the front housing 19 and the rear housing 18 via a bearing. The upper part of the drive spiral bevel gear 4 is a gear shaft structure, and the lower part is a bevel gear structure. The bearing is mounted on the outer side of the gear shaft structure. A seal is provided on the side of the bearing and between the gear shaft and the main reduction housing assembly 8 for sealing. The upper end of the driving spiral bevel gear 4 is fixedly equipped with a driven gear 23 by a locking nut 24, so that the driven gear 23 and the driving spiral bevel gear 4 can rotate synchronously. The side of the driven gear 23 and the inner side of the front housing 19 are meshed with a driving gear 22. The driving gear 22 is rotatably set with the front housing 19 and the rear housing 18 through a deep groove ball bearing 21. The driving gear 22 is restricted by the front housing 19, the rear housing 18 and the deep groove ball bearing 21 while allowing it to rotate. A plastic dust cover 20 is provided on the inner side of the upper end of the rear housing 18. The driving gear 22 is connected to a hydraulic motor through a drive shaft, and the power input by the hydraulic motor is used as the power for the drive axle.

[0019] The lower part of the driving spiral bevel gear 4 is rotatably mounted to the main reduction housing assembly 8 via bearings. A bridge housing connecting plate 5 is bolted to the right end of the main reduction housing assembly 8, and a right axle housing 1 is bolted to the right end of the bridge housing connecting plate 5. A left axle housing 17 is bolted to the left end of the main reduction housing assembly 8. A differential assembly 7 is located inside the main reduction housing assembly 8. A left half-shaft 9 and a right half-shaft 2 are mounted at both ends of the differential assembly 7. A driven spiral bevel gear 6 is fixedly mounted on the outer side of the right half-shaft 2. The driven spiral bevel gear 6 meshes with the driving spiral bevel gear 4 for transmission. A [missing information - likely a type of bearing] is provided between the inner sides of both ends of the main reduction housing assembly 8 and the differential assembly 7. Adjusting nut 3, the ends of the left axle housing 17 and the right axle housing 1 are both equipped with hubs 11 via bearings, the ends of the hubs 11 are equipped with wheel rim assemblies 14 via rim bolts 15 and rim nuts 16, the inner side of the wheel rim assembly 14 and the hubs 11 is equipped with an internal gear ring 12, the ends of the left half shaft 9 and the right half shaft 2 are both connected to sun gears 13 via half shaft connecting sleeves 10, the sun gear 13 meshes with the internal gear ring 12 for transmission, the two hubs 11 are rotatably set with the left axle housing 17 and the right axle housing 1 respectively, the internal gear ring 12 is fixedly connected to the wheel rim assembly 14, and the sides of the left axle housing 17 and the right axle housing 1 are provided with connecting plates with mounting holes.

[0020] The driving spiral bevel gear 4 is fixed together with the driven gear 23 by the locking nut 24, transmitting power to the differential assembly 7 equipped with the driven spiral bevel gear 6, and also transmitting it to the front axle assembly through the connection.

[0021] A complete drive axle consists of a front axle and a rear axle, which are connected by a transmission. The rear axle structure of this utility model is the same in terms of composition and function of the main reduction housing assembly 8, differential assembly 7, wheel-side assembly 14, wheel hub 11, left half-shaft 9, right half-shaft 2, and axle housing. The difference lies in the connection part with the hydraulic motor, where a brake assembly is installed instead of a reduction gearbox. Apart from the brake assembly and related components connecting to it, the other structures of the front and rear axles are the same.

[0022] This utility model adopts a compact structural design, which significantly reduces the proportion of useless space. It reduces the material requirements for manufacturing by reducing the proportion of material used in terms of appearance and structure. This results in the empty space ratio of the left axle housing 17 and the right axle housing 1 being 20%-27%, the empty space ratio of the main axle housing being 30%-35%, and the empty space ratio of the housing assembly being 30%-35%. There will be fluctuations based on these values, but the fluctuation range will not exceed ±2%. This can greatly reduce the overall structural volume. At the same time, it adopts a small and lightweight design concept, and designs the distance between the ends of the wheel side components 14 at both ends to be less than 1200mm. This allows the width of the loader to reach less than 1400mm after the drive axle is assembled, increasing the working environment that the loader can adapt to.

[0023] This utility model adopts a compact structural design. The reasonable external structure compresses a large amount of useless internal space, reduces the amount of manufacturing materials, and limits the size within a certain range, reducing the overall volume and size of the structure. This results in a compact and lightweight structure, thereby reducing costs and making it suitable for operation in confined environments. It uses a hydraulic motor as a power source and adopts a two-stage reduction principle to achieve hydraulic motor overload protection and more stable power transmission.

Claims

1. A micro-hydraulic rear drive axle architecture, characterized by: The axle assembly includes a right axle housing (1), a left axle housing (17), and a main reduction housing assembly (8). A housing assembly is mounted on the upper end of the main reduction housing assembly (8). The housing assembly includes a front housing (19) and a rear housing (18) assembled by bolts and cylindrical pins (25). The upper part of the main reduction housing assembly (8) is connected to the rear housing (18) by bolts. A drive spiral bevel gear (4) is rotatably mounted on the inner side between the front housing (19) and the rear housing (18) via bearings. The upper end of the drive spiral bevel gear (4) is fixed by a lock nut (24). A driven gear (23) is provided, and a driving gear (22) is meshed on the side of the driven gear (23) and inside the front housing (19). The driving gear (22) is rotatably connected to the front housing (19) and the rear housing (18) via a deep groove ball bearing (21). A plastic dust cover (20) is provided on the inner side of the upper end of the rear housing (18). The lower part of the driving spiral bevel gear (4) is rotatably connected to the main reduction housing assembly (8) via a bearing. A bridge housing connecting disc (5) is bolted to the right end of the main reduction housing assembly (8). 5) The right end of the main reduction housing assembly (8) is bolted with a right axle housing (1), and the left end of the main reduction housing assembly (8) is bolted with a left axle housing (17). The inner side of the main reduction housing assembly (8) is provided with a differential assembly (7). The two ends of the differential assembly (7) are equipped with a left half shaft (9) and a right half shaft (2). The outer side of the right half shaft (2) is fixed with a driven spiral bevel gear (6). The driven spiral bevel gear (6) meshes with the driving spiral bevel gear (4). The inner sides of the two ends of the main reduction housing assembly (8) are connected to the differential assembly (7). Each is equipped with an adjusting nut (3). The ends of the left axle housing (17) and the right axle housing (1) are equipped with a hub (11) through bearings. The ends of the hub (11) are equipped with a wheel rim assembly (14) through a rim bolt (15) and a rim nut (16). An internal gear ring (12) is installed on the inner side between the wheel rim assembly (14) and the hub (11). The ends of the left half shaft (9) and the right half shaft (2) are connected to a sun gear (13) through a half shaft connecting sleeve (10). The sun gear (13) meshes with the internal gear ring (12) for transmission.

2. A micro-hydraulic rear drive axle structure according to claim 1, characterized in that: The two wheel hubs (11) are rotatably mounted with the left axle housing (17) and the right axle housing (1), respectively.

3. The micro-hydraulic rear drive axle structure of claim 1, wherein: The drive gear (22) is connected to a hydraulic motor via a drive shaft.

4. The micro-hydraulic rear drive axle structure of claim 1, wherein: Both the left axle housing (17) and the right axle housing (1) are provided with connecting plates with mounting holes on their sides.

5. The micro-hydraulic rear drive axle structure of claim 1, wherein: The internal gear ring (12) is fixedly connected to the wheel edge assembly (14).

6. The micro-hydraulic rear drive axle structure of claim 1, wherein: The free space ratio inside the left axle housing (17) and the right axle housing (1) is 20%-27%, the free space ratio inside the main reduction housing is 30%-35%, and the free space ratio inside the housing assembly is 30%-35%.

7. The micro-hydraulic rear drive axle structure of claim 1, wherein: The distance between the ends of the wheel rim assemblies (14) is less than 1200mm.

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