Amphibious drive axle and amphibious steering drive axle

Abstract

The utility model discloses a kind of water and drought dual-purpose drive axle and water and drought dual-purpose steering drive axle, comprising: wheel side reducer, wheel side reducer includes the side reduction box of being equipped with planetary gear reduction mechanism, side reduction box includes side reduction box body, first side reduction box cover and second side reduction box cover, side reduction box body is fixedly connected with knuckle shell or axle shell, gear ring is fixed in side reduction box body, outer side planetary gear carrier is provided with shaft head, shaft head is rotatably installed in first side reduction box cover by first bearing, inner side planetary gear carrier is rotatably installed in second side reduction box cover by second bearing, sun gear shaft is rotatably installed in outer side planetary gear carrier by third bearing, and rotatably installed in inner side planetary gear carrier by fourth bearing. The utility model is high in assembly precision and easy to install, and has good maintainability, upward exhaust through air vent plug, reduce air pressure, avoid the pollution caused to paddy field, make conventional planetary reduction paddy field bridge upgrade to water and drought dual-purpose bridge.

Description

Technical Field

[0001] This utility model relates to the field of amphibious drive axle technology, and also to an amphibious steering drive axle with steering function. Background Technology

[0002] The drive axle or steering drive axle is located at the end of the power transmission system of self-propelled operating machinery (including tractors, agricultural machinery, etc.) or vehicles (including agricultural vehicles, engineering vehicles, transport vehicles, etc.). Its basic functions are: to transmit the torque output by the engine to the wheel-side reducer through the main reducer, differential, half shaft, etc., thereby driving the wheels and achieving speed reduction and torque increase; to change the direction of torque transmission through the bevel gear pair of the main reducer; to achieve differential speed action of the two wheels through the differential, ensuring that the inner and outer wheels turn at different speeds; and to achieve load bearing and torque transmission through the axle housing and wheels.

[0003] Planetary gear reducers, with their large speed ratios, compact structure, and high transmission torque, are commonly used as wheel-side reducers. A typical planetary gear reducer includes a sun gear shaft, planet carriers, and a ring gear. The planet carrier is fixedly connected to the wheel hub, which is rotatably mounted on the steering knuckle housing via tapered roller bearings. The ring gear is fixed to the steering knuckle housing via threaded connections. However, the aforementioned wheel-side reducers have the following technical drawbacks:

[0004] First, the gear ring needs to be connected to the steering knuckle housing via a threaded connector, making it difficult to guarantee the coaxiality of the sun gear shaft, planetary gear carrier, and gear ring, and the assembly process is cumbersome.

[0005] Secondly, the planetary gear carrier also serves as the end cap of the planetary reduction mechanism, and due to size limitations, it is difficult to adapt to steel rings of different specifications.

[0006] Third, in the steering drive axle, on the one hand, the wheel hub is rotated and mounted on the steering knuckle housing, and a dynamic seal needs to be installed between the wheel hub and the steering knuckle housing, which is prone to oil leakage; on the other hand, since the sun gear shaft of the planetary reduction mechanism is not fixed axially, when the steering knuckle housing swings, it will drive the sun gear shaft to be pulled axially, thereby increasing the wear of the oil seal between the sun gear shaft and the steering knuckle housing, which is also prone to oil leakage. When working in paddy fields, oil pollution will cause pollution to the paddy fields.

[0007] Chinese utility model patent CN217944802U discloses a transmission and sealing structure for a steering drive axle. The sun gear shaft and the universal joint short fork are connected by internal and external splines, improving the operating conditions of the oil seal. The sealing motion of the oil seal and sun gear shaft changes from reciprocating pull-rotation to rotation only, improving the durability and service life of the oil seal. However, due to space limitations, the key connection between the sun gear shaft and the universal joint short fork can only be lubricated initially, preventing subsequent maintenance. Furthermore, as the oil temperature and air pressure increase within the planetary reduction mechanism, oil leaks are more likely to occur at the seals of various components. Utility Model Content

[0008] In view of this, the technical problem to be solved by this utility model is to provide a water-and-land steering drive axle with steering function and a water-and-land drive axle without steering function, so as to improve assembly accuracy and installation convenience.

[0009] To solve the first technical problem mentioned above, the technical solution adopted by this utility model is as follows:

[0010] A dual-purpose (water and land) steering drive axle includes: a half-shaft housing and a steering knuckle housing, the steering knuckle housing being rotatably mounted on the half-shaft housing; a wheel-side reducer, the wheel-side reducer including a planetary gear reduction mechanism, the planetary gear reduction mechanism including a sun gear shaft, planetary gears, planetary gear carriers and a ring gear, the planetary gear carrier including an outer planetary gear carrier and an inner planetary gear carrier connected together, the planetary gears being rotatably mounted between the outer planetary gear carrier and the inner planetary gear carrier, the sun gear shaft being connected to a universal coupling; the wheel-side reducer includes a side reducer housing, the planetary gear reduction mechanism being installed inside the side reducer housing, the side reducer housing including a side reducer housing body, a first side reducer housing cover and a second side reducer housing cover. The side reduction gearbox is fixedly connected to the steering knuckle housing. The first side reduction gearbox cover is fixedly connected to the side reduction gearbox. The second side reduction gearbox cover, the gear ring, and the side reduction gearbox are fixedly connected together. The outer planetary gear carrier is provided with a shaft head. The shaft head is rotatably mounted on the first side reduction gearbox cover and extends out of the first side reduction gearbox cover via a first bearing. The inner planetary gear carrier is rotatably mounted on the second side reduction gearbox cover via a second bearing. The sun gear shaft is rotatably mounted on the outer planetary gear carrier via a third bearing and rotatably mounted on the inner planetary gear carrier via a fourth bearing. One end of the sun gear shaft passes through the mounting hole of the second side reduction gearbox cover and is connected to the universal coupling for transmission.

[0011] A first oil seal is provided between the shaft head and the first side reduction box cover.

[0012] The universal joint is a cross-shaft universal joint coupling, which includes a first universal joint fork, a second universal joint fork, and a cross shaft. The first universal joint fork is slidably connected to the sun gear shaft via a key. The sun gear shaft is axially fixed relative to the planetary gear carrier. A second oil seal is provided between the second side reduction gearbox cover and the sun gear shaft.

[0013] The second side tank cover is equipped with an oil injection nozzle.

[0014] The side reduction box is equipped with a vent plug.

[0015] The axle head is fixedly connected to a hub connecting disc.

[0016] The steering knuckle housing is rotatably mounted to the half-shaft housing via an upper kingpin and a lower kingpin.

[0017] As a concept, to solve the second technical problem mentioned above, the technical solution adopted by this utility model is:

[0018] A dual-purpose (water and land) drive axle includes: a half-shaft housing; a wheel-side reducer, the wheel-side reducer including a planetary gear reduction mechanism, the planetary gear reduction mechanism including a sun gear shaft, planetary gears, planetary gear carriers and a ring gear, the planetary gear carrier including an outer planetary gear carrier and an inner planetary gear carrier connected together, the planetary gears being rotatably mounted between the outer planetary gear carrier and the inner planetary gear carrier; the wheel-side reducer includes a side reduction gearbox, the planetary gear reduction mechanism being installed inside the side reduction gearbox, the side reduction gearbox including a side reduction gearbox body, a first side reduction gearbox cover and a second side reduction gearbox cover, the side reduction gearbox body being fixed to the half-shaft housing. The first side reduction gearbox cover is fixedly connected to the side reduction gearbox body. The second side reduction gearbox cover, the gear ring, and the side reduction gearbox body are fixedly connected together. The outer planetary gear carrier is provided with a shaft head. The shaft head is rotatably mounted on the first side reduction gearbox cover and extends out of the first side reduction gearbox cover through a first bearing. The inner planetary gear carrier is rotatably mounted on the second side reduction gearbox cover through a second bearing. The sun gear shaft is rotatably mounted on the outer planetary gear carrier through a third bearing and rotatably mounted on the inner planetary gear carrier through a fourth bearing. One end of the sun gear shaft passes through the mounting hole of the second side reduction gearbox cover.

[0019] After adopting the above technical solution, the beneficial effects of this utility model are:

[0020] The amphibious steering drive axle disclosed in this utility model has a planetary gear reduction mechanism installed in the side reduction gearbox. The side reduction gearbox includes a side reduction gearbox body, a first side reduction gearbox cover, and a second side reduction gearbox cover. The first side reduction gearbox cover is fixedly connected to the side reduction gearbox body. The second side reduction gearbox cover, the gear ring, and the side reduction gearbox body are fixedly connected together. The side reduction gearbox does not rotate relative to the half-shaft housing. The gear ring is directly fixed in the side reduction gearbox body and does not need to be connected to the steering knuckle housing through threaded connectors, making installation convenient. The inner hole and outer circle of the inner planetary gear carrier can be clamped and machined in one operation and the fourth and second bearings are installed respectively. The inner hole and outer circle of the outer planetary gear carrier can be clamped and machined in one operation and the third and first bearings are installed respectively. The third and fourth bearings are used to support the sun gear shaft between the outer and inner planetary gear carriers. The first bearing is used to support the outer planetary gear carrier on the first side reduction gearbox cover, and the second bearing is used to support the inner planetary gear carrier on the second side reduction gearbox cover. Therefore, the coaxiality of the sun gear shaft, planetary gear carrier, and gear ring is easily guaranteed, improving assembly accuracy. The amphibious drive axle disclosed in this utility model does not include the steering knuckle housing, and the side reduction gearbox is directly fixed to the half shaft housing, achieving the same technical effect as the amphibious steering drive axle.

[0021] The amphibious steering drive axle or amphibious drive axle disclosed in this utility model has an axle head on the outer planetary gear carrier. The axle head is rotatably mounted on the first side reduction gear cover and extends out of the first side reduction gear cover via a first bearing. The axle head is fixedly connected to a hub connecting disc. By replacing the hub connecting disc, it can be adapted to steel wheels of different specifications, thereby improving the adaptability of the drive axle.

[0022] The amphibious steering drive axle disclosed in this utility model uses a cross-shaft universal joint coupling, which includes a first universal joint fork, a second universal joint fork, and a cross shaft. The first universal joint fork is slidably connected to the sun gear shaft via a key. The sun gear shaft is axially fixed relative to the planetary gear carrier. A second oil seal is provided between the second side reducer cover and the sun gear shaft. The sealing motion of the second oil seal and the sun gear shaft is changed from the reciprocating pull-and-rotate motion of the prior art to rotation only, improving the durability and service life of the oil seal. Simultaneously, due to the adoption of the side reducer structure, its internal space is increased. The second side reducer cover is equipped with an oil injection nozzle. By disassembling the connection between the side reducer body and the steering knuckle housing and removing the wheel-side reducer, lubrication can be provided to the key connection between the universal joint fork and the sun gear shaft through the oil injection nozzle. Therefore, subsequent maintenance and repair of the wheel-side reducer are possible, resulting in good maintainability.

[0023] The dual-purpose steering drive axle or dual-purpose drive axle disclosed in this utility model has a side reduction gearbox that does not rotate relative to the half-shaft housing. Therefore, a vent plug can be installed on the top of the side reduction gearbox. When the oil temperature and air pressure in the planetary reduction mechanism rise, the air can be vented upward through the vent plug, which reduces the air pressure and solves the problem of oil leakage from the side reduction gearbox. This avoids pollution to paddy fields and upgrades the conventional planetary reduction dryland axle to a dual-purpose axle for both water and dry land. Attached Figure Description

[0024] Figure 1 This is a longitudinal sectional view of Embodiment 1 of the application of the wheel-side reducer of this utility model to a water-and-dryland steering drive axle;

[0025] Figure 2 This is a longitudinal sectional view of Embodiment 2 of the present invention's wheel-side reducer applied to a dual-purpose (water and land) drive axle;

[0026] In the picture:

[0027] 10. Hub connecting plate; 11A. Sun gear shaft; 11B. Sun gear shaft; 12A. Outer planetary gear carrier; 12B. Inner planetary gear carrier; 13. Ring gear; 14. First bearing; 15. Second bearing; 16. Third bearing; 17. Fourth bearing; 18. Planetary gears; 19. First oil seal; 20. Second oil seal; 21. Side reduction gearbox; 22. First side reduction gearbox cover; 23A. Second side reduction gearbox cover; 23B. Second side reduction gearbox cover; 24. Oil filler nozzle; 25. Breather plug; 26. Drain plug; 31. Steering knuckle housing; 32. Upper kingpin; 33. Lower kingpin; 41. First universal joint fork; 42. Second universal joint fork; 43. Cross shaft; 5A. Half shaft housing; 5B. Half shaft housing. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 As shown, a water and land-use steering drive axle has a steering knuckle housing 31 that is rotatably mounted on a half-shaft housing 5A via an upper kingpin 32 and a lower kingpin 33.

[0031] The wheel-side reducer includes a planetary gear reduction mechanism, which comprises a sun gear shaft 11A, planetary gears 18, planetary gear carriers, and a ring gear 13. The planetary gear carrier includes an outer planetary gear carrier 12A and an inner planetary gear carrier 12B connected together. The planetary gears 18 are rotatably mounted between the outer planetary gear carrier 12A and the inner planetary gear carrier 12B. The planetary gear reduction mechanism has a large speed ratio, compact structure, and high transmission torque.

[0032] In this embodiment, the wheel-side reducer further includes a wheel-side reducer housing. The planetary gear reduction mechanism is installed inside the wheel-side reducer housing. The wheel-side reducer housing includes a wheel-side reducer housing body 21, a first wheel-side reducer housing cover 22, and a second wheel-side reducer housing cover 23A. The wheel-side reducer housing body 21 is fixedly connected to the steering knuckle housing 31. The first wheel-side reducer housing cover 22 is fixedly connected to the wheel-side reducer housing body 21. The second wheel-side reducer housing cover 23A, the gear ring 13, and the wheel-side reducer housing body 21 are fixedly connected together. The outer planetary gear carrier 12A is provided with a shaft head. The shaft head is rotatably mounted on the first wheel-side reducer housing cover 22 and extends out of the first wheel-side reducer housing cover 22 via a first bearing 14. A first oil seal 19 is provided between the shaft head and the first wheel-side reducer housing cover 22. The inner planetary gear carrier 12B is rotatably mounted to the second side reduction gearbox cover 23A via the second bearing 15. The sun gear shaft 11A is rotatably mounted to the outer planetary gear carrier 12A via the third bearing 16, and rotatably mounted to the inner planetary gear carrier 12B via the fourth bearing 17. One end of the sun gear shaft 11A passes through the mounting hole of the second side reduction gearbox cover 23A and is connected to the universal coupling for transmission. An oil drain plug 26 is provided at the bottom of the side reduction gearbox 21. The first bearing 14 is preferably a cylindrical roller bearing, while the second bearing 15, third bearing 16, and fourth bearing 17 are preferably ball bearings.

[0033] The above structure ensures that the reducer box does not rotate relative to the half-shaft housing during operation. The gear ring 13 is directly fixed inside the reducer box body 21, without needing to be connected to the steering knuckle housing 31 via threaded connectors, making installation convenient. The inner hole and outer circle of the inner planetary gear carrier 12B can be machined in one clamping and respectively installed with the fourth bearing 17 and the second bearing 15. The inner hole and outer circle of the outer planetary gear carrier 12A can be machined in one clamping and respectively installed with the third bearing 16 and the first bearing 14. The third bearing 16 and the fourth bearing 17 are used to support the sun gear shaft 11A between the outer planetary gear carrier 12A and the inner planetary gear carrier 12B. The first bearing 14 is used to support the outer planetary gear carrier 12A on the first reducer box cover 22. The second bearing 15 is used to support the inner planetary gear carrier 12B on the second reducer box cover 23A. Therefore, the coaxiality of the sun gear shaft 11A, planetary gear carrier, and gear ring 13 is easily guaranteed, improving assembly accuracy.

[0034] In this embodiment, the axle head is fixedly connected to a hub connecting plate 10. By replacing the hub connecting plate 10, it can be adapted to steel rings of different specifications, thereby improving the adaptability of the drive axle.

[0035] In this embodiment, the universal joint is a cross-shaft type universal joint coupling, which includes a first universal joint fork 41, a second universal joint fork 42, and a cross shaft 43. The first universal joint fork 41 is slidably connected to the sun gear shaft 11A via a key. The sun gear shaft 11A is axially fixed relative to the planetary gear carrier. A second oil seal 20 is provided between the second side reducer cover 23A and the sun gear shaft 11A. The second side reducer cover 23A is provided with an oil injection nozzle 24 to provide lubrication to the second oil seal 20. The sealing movement of the second oil seal 20 and the sun gear shaft 11A is changed from the reciprocating pull-and-rotate motion of the prior art to rotation only without pull-and-rotate, which improves the durability and service life of the oil seal. Meanwhile, due to the adoption of the side reduction gearbox structure, its internal space is increased, which makes it convenient to install the grease nipple 24 on the second side reduction gearbox cover 23A. By disassembling the connecting piece between the side reduction gearbox body 21 and the steering knuckle housing 31 and removing the wheel-side reducer, lubrication can be provided to the key connection between the first universal joint fork 41 and the sun gear shaft 11A through the grease nipple 24. Therefore, the wheel-side reducer can be subsequently maintained and repaired, and has good maintainability.

[0036] In this embodiment, a vent plug 25 is provided on the top of the side reduction gearbox 21. When the oil temperature and air pressure rise in the planetary reduction mechanism, the air can be vented upward through the vent plug 25, which reduces the air pressure, solves the problem of oil leakage in the side reduction gearbox, avoids pollution to the paddy field, and upgrades the conventional planetary reduction dryland bridge into a bridge suitable for both dryland and paddy fields.

[0037] Example 2

[0038] like Figure 2 As shown, a dual-purpose (water and land) drive axle includes a wheel-side reducer mounted on the half-shaft housing 5B. The wheel-side reducer comprises a planetary gear reduction mechanism, which includes a sun gear shaft 11B, planetary gears 18, planetary gear carriers, and a ring gear 13. The planetary gear carrier includes an outer planetary gear carrier 12A and an inner planetary gear carrier 12B connected together. The planetary gears 18 are rotatably mounted between the outer planetary gear carrier 12A and the inner planetary gear carrier 12B. The planetary gear reduction mechanism features a large speed ratio, compact structure, and high transmission torque.

[0039] In this embodiment, the wheel-side reducer further includes a side reduction gearbox. The planetary gear reduction mechanism is installed inside the side reduction gearbox. The side reduction gearbox includes a side reduction gearbox body 21, a first side reduction gearbox cover 22, and a second side reduction gearbox cover 23B. The side reduction gearbox body 21 is fixedly connected to the half-shaft housing 5B. The first side reduction gearbox cover 22 is fixedly connected to the side reduction gearbox body 21. The second side reduction gearbox cover 23B, the gear ring 13, and the side reduction gearbox body 21 are fixedly connected together. The outer planetary gear carrier 12A is provided with a shaft head. The shaft head is rotatably mounted on the first side reduction gearbox cover 22 and extends out of the first side reduction gearbox cover 22 via a first bearing 14. A first oil seal 19 is provided between the shaft head and the first side reduction gearbox cover 22. The inner planetary gear carrier 12B is rotatably mounted to the second side reduction gearbox cover 23B via the second bearing 15. The sun gear shaft 11B is rotatably mounted to the outer planetary gear carrier 12A via the third bearing 16, and rotatably mounted to the inner planetary gear carrier 12B via the fourth bearing 17. One end of the sun gear shaft 11B protrudes through the mounting hole of the second side reduction gearbox cover 23B. An oil drain plug 26 is provided at the bottom of the side reduction gearbox 21. The first bearing 14 is preferably a cylindrical roller bearing, while the second bearing 15, the third bearing 16, and the fourth bearing 17 are preferably ball bearings.

[0040] The above structure ensures that the reducer box does not rotate relative to the half-shaft housing during operation. The gear ring 13 is directly fixed inside the reducer box body 21, without needing to be connected to the half-shaft housing 5B via threaded connectors, making installation convenient. The inner hole and outer circle of the inner planetary gear carrier 12B can be machined in one clamping and then the fourth bearing 17 and the second bearing 15 are installed respectively. The inner hole and outer circle of the outer planetary gear carrier 12A can be machined in one clamping and then the third bearing 16 and the first bearing 14 are installed respectively. The third bearing 16 and the fourth bearing 17 are used to support the sun gear shaft 11B between the outer planetary gear carrier 12A and the inner planetary gear carrier 12B. The first bearing 14 is used to support the outer planetary gear carrier 12A on the first reducer box cover 22. The second bearing 15 is used to support the inner planetary gear carrier 12B on the second reducer box cover 23B. Therefore, the coaxiality of the sun gear shaft 11B, the planetary gear carrier, and the gear ring 13 is easily guaranteed, improving assembly accuracy.

[0041] In this embodiment, the axle head is fixedly connected to a hub connecting plate 10. By replacing the hub connecting plate 10, it can be adapted to steel rings of different specifications, thereby improving the adaptability of the drive axle.

[0042] In this embodiment, the sun gear shaft 11B is axially fixed relative to the planetary gear carrier.

[0043] In this embodiment, a vent plug 25 is provided on the top of the side reduction gearbox 21. When the oil temperature and air pressure rise in the planetary reduction mechanism, the air can be vented upward through the vent plug 25, which reduces the air pressure, solves the problem of oil leakage in the side reduction gearbox, avoids pollution to the paddy field, and upgrades the conventional planetary reduction dryland bridge into a bridge suitable for both dryland and paddy fields.

[0044] This utility model is not limited to the above embodiments. All improvements made based on the concept, principle, structure and method of this utility model shall fall within the protection scope of this utility model.

Claims

1. A dual-purpose (water and land) steering drive axle, comprising: A half-shaft housing and a steering knuckle housing, wherein the steering knuckle housing is rotatably mounted on the half-shaft housing; A wheel-side reducer, comprising a planetary gear reduction mechanism, wherein the planetary gear reduction mechanism includes a sun gear shaft, planet gears, planet carriers, and a ring gear, the planet carrier comprising an outer planet carrier and an inner planet carrier connected together, the planet gears being rotatably mounted between the outer planet carrier and the inner planet carrier, and the sun gear shaft being connected to a half-shaft via a universal coupling; characterized in that... The wheel-side reducer includes a wheel-side reducer housing, and the planetary gear reducer mechanism is installed inside the wheel-side reducer housing. The wheel-side reducer housing includes a wheel-side reducer housing body, a first wheel-side reducer housing cover, and a second wheel-side reducer housing cover. The wheel-side reducer housing body is fixedly connected to the steering knuckle housing, and the first wheel-side reducer housing cover is fixedly connected to the wheel-side reducer housing body. The second wheel-side reducer housing cover, the gear ring, and the wheel-side reducer housing body are fixedly connected together. The outer planetary gear carrier is provided with a shaft head, which is rotatably mounted on the first wheel-side reducer housing cover via a first bearing and extends out of the first wheel-side reducer housing cover. The inner planetary gear carrier is rotatably mounted on the second wheel-side reducer housing cover via a second bearing. The sun gear shaft is rotatably mounted on the outer planetary gear carrier via a third bearing and rotatably mounted on the inner planetary gear carrier via a fourth bearing. One end of the sun gear shaft passes through the mounting hole of the second wheel-side reducer housing cover and is connected to the universal coupling for transmission.

2. The dual-purpose (water and land) steering drive axle as described in claim 1, characterized in that, A first oil seal is provided between the shaft head and the first side reduction box cover.

3. The dual-purpose (water and land) steering drive axle as described in claim 1, characterized in that, The universal joint is a cross-shaft type universal joint coupling, which includes a first universal joint fork, a second universal joint fork, and a cross shaft. The first universal joint fork is slidably connected to the sun gear shaft by a key. The sun gear shaft is axially fixed relative to the planetary gear carrier. A second oil seal is provided between the second side reduction gearbox cover and the sun gear shaft.

4. The dual-purpose (water and land) steering drive axle as described in claim 3, characterized in that, The second side tank cover is equipped with an oil injection nozzle.

5. The dual-purpose (water and land) steering drive axle as described in claim 1, characterized in that, The side reduction box is equipped with a vent plug.

6. The dual-purpose (water and land) steering drive axle as described in claim 1, characterized in that, The axle head is fixedly connected to a hub connecting disc.

7. The dual-purpose (water and land) steering drive axle as described in claim 1, characterized in that, The steering knuckle housing is rotatably mounted to the half-shaft housing via an upper kingpin and a lower kingpin.

8. A dual-purpose (water and land) drive axle, comprising: Half-shaft housing; A wheel-side reducer, comprising a planetary gear reduction mechanism, the planetary gear reduction mechanism including a sun gear shaft, planet gears, planet carriers, and a ring gear, the planet carrier including an outer planet carrier and an inner planet carrier connected together, the planet gears being rotatably mounted between the outer planet carrier and the inner planet carrier; characterized in that... The wheel-side reducer includes a wheel-side reducer housing, and the planetary gear reducer mechanism is installed inside the wheel-side reducer housing. The wheel-side reducer housing includes a wheel-side reducer housing body, a first wheel-side reducer housing cover, and a second wheel-side reducer housing cover. The wheel-side reducer housing body is fixedly connected to the half-shaft housing, and the gear ring is fixed inside the wheel-side reducer housing body. The first wheel-side reducer housing cover and the second wheel-side reducer housing cover are respectively fixedly connected to the wheel-side reducer housing body from both sides of the gear ring. The outer planetary gear carrier is provided with a shaft head. The shaft head is rotatably mounted on the first wheel-side reducer housing cover and extends out of the first wheel-side reducer housing cover via a first bearing. The inner planetary gear carrier is rotatably mounted on the second wheel-side reducer housing cover via a second bearing. The sun gear shaft is rotatably mounted on the outer planetary gear carrier via a third bearing and rotatably mounted on the inner planetary gear carrier via a fourth bearing. One end of the sun gear shaft protrudes from the mounting hole of the second wheel-side reducer housing cover.

9. The dual-purpose (water and land) drive axle as described in claim 8, characterized in that, The side reduction box is equipped with a vent plug.

10. The dual-purpose (water and land) drive axle as described in claim 8, characterized in that, The axle head is fixedly connected to a hub connecting disc.

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