Drive axle wheel edge structure for engineering machinery

Abstract

The utility model discloses a drive axle wheel edge structure for engineering machinery, which is characterized in that a hub and a planet wheel shaft are integrally cast, and a limiting baffle plate is used for limiting the axial movement of the planet wheel shaft, so that the planet wheel structures are tightly connected and accurately positioned, and the maintenance difficulty is reduced; according to the technical scheme, a half shaft, an axle housing, a planet gear ring, a planet carrier and a hub are coaxially arranged; the half shaft is arranged in the axle housing, and a planetary gear ring is fixedly arranged at the end part of the axle housing; a sun wheel is arranged at the end of the half shaft, two planet wheels are arranged between the sun wheel and the planet wheel gear ring, and the planet wheels are meshed with the sun wheel and the planet wheel gear ring respectively. The two planet gears are mounted on a supporting shaft of the planet carrier; the hub is arranged on an outer shell of the axle housing, the hub and the axle housing can rotate relatively, and the planet carrier is fixedly connected with one end of the hub; and rim bolts are also arranged on the planet carrier and the hub.

Description

Technical Field

[0001] This utility model belongs to the field of loader technology, specifically relating to a drive axle wheel-side structure for engineering machinery. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] The wheel hub of the drive axle in construction machinery is a crucial part of power transmission, playing a key role in reducing speed and increasing torque. This location is also a frequent point of failure for the drive axle, often resulting in tooth breakage and oil leaks.

[0004] The drive axle wheel rim structure is integrally cast, which is difficult to cast and the assembly process is complex. It requires first assembling planetary gears, needle rollers, and other parts into the planetary gear carrier, and finally securing them with the planetary gear shaft. During maintenance, the original solution required disassembling the wheel rim or modifying the planetary gear carrier for all operations. In the original drive axle, the planetary gear shaft was installed between the planetary gear carrier and the hub, involving numerous assembly and machining parts. This complex assembly process led to inaccurate positioning of the planetary gears during installation. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a drive axle wheel-side structure for engineering machinery. By designing the wheel hub and planetary gear shaft as an integral casting, and using a limiting baffle to limit the axial movement of the planetary gears, it ensures that each planetary gear structure is tightly connected and accurately positioned, thereby reducing maintenance difficulty.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] This utility model provides a drive axle wheel-side structure for engineering machinery, comprising: a half-shaft, an axle housing, a planetary gear ring, a planetary gear carrier, and a hub coaxially arranged; the half-shaft is disposed inside the axle housing, and a planetary gear ring is fixedly disposed at the end of the axle housing; a sun gear is disposed at the end of the half-shaft, and two planetary gears are disposed between the sun gear and the planetary gear ring, the planetary gears meshing with the sun gear and the planetary gear ring respectively; the two planetary gears are mounted on the support shaft of the planetary gear carrier; the hub is disposed on the outer shell of the axle housing, and the hub and the axle housing are rotatable relative to each other, and one end of the planetary gear carrier is fixedly connected to the hub;

[0008] The planetary gear carrier and hub are also equipped with rim bolts for connecting the rim and hub.

[0009] Furthermore, the planetary gear carrier is connected to the wheel hub by a first fastener, and multiple first fasteners are provided around the axis of the wheel hub.

[0010] Furthermore, a first tapered roller bearing and a rotary oil seal are provided between the wheel hub and the axle housing; a bearing spacer is provided between the first tapered roller bearing and the shoulder of the axle housing, and an oil seal spacer is provided between the first tapered roller bearing and the rotary oil seal; a second tapered roller bearing is provided between the wheel hub and the planetary gear ring.

[0011] Furthermore, the end of the bridge housing is connected to the planetary gear ring via a second fastener.

[0012] Furthermore, the end of the half-shaft is connected to the sun gear via a flat key; one side of the sun gear abuts against the shaft of the half-shaft, and a locking spring is provided on the other side, the locking spring being mounted on the half-shaft.

[0013] Furthermore, a needle roller is provided between the planetary gear and the support shaft. The needle rollers are arranged in two rows around the support shaft, and a needle roller spacer is provided between axially adjacent needle rollers for lubricating oil to enter and for lubrication between the needle rollers.

[0014] Furthermore, one end of the support shaft is provided with a limit baffle and a shaft retaining ring, and the other end is provided with a planetary gear washer to limit the planetary gears and needle rollers from moving axially along the support shaft.

[0015] Furthermore, an end cap is provided on the side of the planetary gear carrier away from the half-shaft, and a limiting block is provided at the central axis of the end cap, and the limiting block is arranged on the side close to the half-shaft; the end cap and the planetary gear carrier are connected by a third fastener, and multiple third fasteners are provided around the axis of the end cap.

[0016] Furthermore, an adjustment support is provided at the end axis position of the half shaft, and the adjustment support abuts against the limiting block of the end cover; the adjustment support and the half shaft are threaded together, and the half shaft is limited by the adjustment support.

[0017] Furthermore, a brake disc is provided at the other end of the wheel hub, and the brake disc is connected to the wheel hub by a fourth fastener.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are:

[0019] This invention designs the hub and planetary gear shaft as a single cast component. By using a limiting baffle to limit the axial movement of the planetary gear shaft, it also constrains the radial deformation of the planetary gear shaft, preventing large-scale changes. This solves the problems of unstable connections and inaccurate positioning between components in the wheel-side assembly of engineering machinery. Through a reasonable structural design, it ensures that the components are tightly connected and accurately positioned, reducing maintenance difficulty and avoiding the problem of inaccurate positioning caused by the separate connection between the support shaft and the planetary gear carrier.

[0020] A double-row needle roller and needle roller spacer are installed between the planetary gear and the support shaft to ensure the axial rotation of the planetary gear and facilitate lubrication. This solves the problems of unstable axial rotation of the planetary gear, insufficient lubrication, and complex axial positioning of the planetary gear shaft. A limit baffle and shaft retaining ring are installed at one end of the support shaft, and a planetary gear washer is installed at the other end to restrict the axial movement of the planetary gear and needle roller. The support shaft and the planetary gear carrier are integrally cast, reducing the axial positioning requirements. This solves the problems of difficult adjustment of bearing installation position and easy interference between oil seal and bearing. At the same time, by installing an end cover on the side of the planetary gear carrier away from the half shaft, the end cover and the planetary gear carrier are connected by a third fastener with multiple winding axes. An adjusting support is installed at the end of the half shaft, which abuts against the end cover limit block and is threaded to achieve half shaft limiting. The structural design is reasonable and the positioning of each component is accurate. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is a structural diagram of the wheel-side assembly of this utility model.

[0023] In the diagram: 1. Half shaft; 2. Axle housing; 3. Rotary oil seal; 4. Planetary gear ring; 5. Second tapered roller bearing; 6. Sealing ring; 7. Hub; 8. First fastener; 9. Planetary gear carrier; 10. Drain bolt; 11. Planetary gear; 12. End cover; 13. Shaft retaining ring; 14. Second fastener; 15. Sun gear; 16. Limit block; 17. Adjusting support; 18. Locking spring; 19. Planetary gear washer; 20. Needle roller; 21. Limit baffle; 22. Third fastener; 23. Needle roller spacer; 24. Rim bolt; 25. First tapered roller bearing; 26. Oil seal spacer; 27. Bearing spacer; 28. Brake disc; 29. ​​Fourth fastener. Detailed Implementation

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] This embodiment discloses a drive axle wheel-side structure for engineering machinery, comprising: a half-shaft 1, an axle housing 2, a planetary gear ring 4, a planetary gear carrier 9, and a hub 7 coaxially arranged; the half-shaft 1 is disposed inside the axle housing 2, and the planetary gear ring 4 is fixedly disposed at the end of the axle housing 2; a sun gear 15 is disposed at the end of the half-shaft 1, and two planetary gears 11 are disposed between the sun gear 15 and the planetary gear ring 4, the planetary gears 11 meshing with the sun gear 15 and the planetary gear ring 4 respectively; the two planetary gears 11 are mounted on the support shaft of the planetary gear carrier 9; the hub 7 is disposed on the outer shell of the axle housing 2, and the hub 7 and the axle housing 2 are rotatable relative to each other, and one end of the planetary gear carrier 9 is fixedly connected to the hub 7; rim bolts 24 are also disposed on the planetary gear carrier 9 and the hub 7 for connecting the rim and the hub 7.

[0027] A sealing ring 6 is provided between the planetary gear carrier 9 and the hub 7, and they are connected by a first fastener 8. Multiple first fasteners 8 are provided around the axis of the hub 7. An oil drain bolt 10 is also provided on the planetary gear carrier 9.

[0028] A first tapered roller bearing 25 and a rotary oil seal 3 are provided between the hub 7 and the axle housing 2; a bearing spacer 27 is provided between the first tapered roller bearing 25 and the shoulder of the axle housing 2 to adjust the position of the first tapered roller bearing 25 so that it is close to the hub 7; an oil seal spacer 26 is provided between the first tapered roller bearing 25 and the rotary oil seal 3 to adjust the position of the rotary oil seal 3 and the first tapered roller bearing 25 to prevent them from contacting each other during use; a second tapered roller bearing 5 is provided between the hub 7 and the planetary gear ring 4.

[0029] The end of the bridge housing 2 is connected to the planetary gear ring 4 by a second fastener 14.

[0030] The end of the half shaft 1 is connected to the sun gear 15 by a flat key; one side of the sun gear 15 abuts against the shaft of the half shaft 1, and the other side is provided with a locking spring 18, which is installed on the half shaft 1.

[0031] A needle roller 20 is provided between the planetary gear 11 and the support shaft. The needle roller 20 serves to ensure that the planetary gear 11 rotates axially around the support shaft. The needle roller 20 is arranged in two rows around the support shaft, and a needle roller spacer 23 is provided between axially adjacent needle rollers 20 for lubricating oil to enter and for lubrication between the needle rollers 20.

[0032] One end of the support shaft is provided with a limit baffle 21 and a shaft retaining ring 13, and the other end is provided with a planetary gear pad 19, which is used to restrict the planetary gear 11 and the needle roller 20 from moving axially along the support shaft; the support shaft and the planetary gear carrier 9 are integrally cast, which reduces the axial positioning requirements of the planetary gear 11 shaft.

[0033] An end cap 12 is provided on the side of the planetary gear carrier 9 away from the half shaft 1. A limiting block 16 is provided at the central axis of the end cap 12 and the limiting block 16 is arranged on the side close to the half shaft 1. The end cap 12 and the planetary gear carrier 9 are connected by a fourth fastener 29. Multiple fourth fasteners 29 are provided around the axis of the end cap 12.

[0034] An adjusting support 17 is provided at the end axis position of the half shaft 1, and the adjusting support 17 abuts against the limiting block 16 of the end cover 12; the adjusting support 17 and the half shaft 1 are threadedly engaged, and the half shaft 1 is limited by the adjusting support 17; the limiting baffle 21 plays a role in radially positioning the needle roller 20, the planetary gear pad 19 and the planetary gear 11, and the planetary gear pad 19 is used to prevent wear between the planetary gear 11 and the planetary gear carrier 9.

[0035] A brake disc 28 is provided at the other end of the wheel hub 7, and the brake disc 28 is connected to the wheel hub 7 by a fourth fastener.

[0036] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A drive axle wheel-side structure for engineering machinery, characterized in that, include: The axle, bridge housing, planetary gear ring, planetary gear carrier, and hub are coaxially arranged. The half-shaft is disposed inside the bridge housing, and a planetary gear ring is fixedly disposed at one end of the bridge housing. A sun gear is disposed at one end of the half-shaft, and two planet gears are disposed between the sun gear and the planetary gear ring, respectively meshing with the sun gear and the planetary gear ring. The two planet gears are mounted on the support shaft of the planetary gear carrier. The hub is disposed on the outer shell of the bridge housing, and the hub and the bridge housing are rotatable relative to each other. One end of the planetary gear carrier is fixedly connected to the hub. The planetary gear carrier and hub are also equipped with rim bolts for connecting the rim and hub.

2. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, The planetary gear carrier is connected to the wheel hub by a first fastener, and multiple first fasteners are arranged around the axis of the wheel hub.

3. The drive axle wheel-side structure for engineering machinery as described in claim 2, characterized in that, A first tapered roller bearing and a rotary oil seal are provided between the wheel hub and the axle housing; a bearing spacer is provided between the first tapered roller bearing and the shoulder of the axle housing, and an oil seal spacer is provided between the first tapered roller bearing and the rotary oil seal; a second tapered roller bearing is provided between the wheel hub and the planetary gear ring.

4. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, The end of the bridge housing is connected to the planetary gear ring via a second fastener.

5. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, The end of the half-shaft is connected to the sun gear by a flat key; one side of the sun gear abuts against the shaft of the half-shaft, and the other side is provided with a locking spring, which is installed on the half-shaft.

6. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, A needle roller is provided between the planetary gear and the support shaft. The needle rollers are arranged in two rows around the support shaft, and a needle roller spacer is provided between axially adjacent needle rollers for lubricating oil to enter and for lubrication between the needle rollers.

7. The drive axle wheel-side structure for engineering machinery as described in claim 6, characterized in that, One end of the support shaft is provided with a limit baffle and a shaft retaining ring, and the other end is provided with a planetary gear washer to limit the planetary gears and needle rollers from moving axially along the support shaft.

8. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, An end cap is provided on the side of the planetary gear carrier away from the half-shaft. A limit block is provided at the central axis of the end cap and is arranged near the half-shaft. The end cap and the planetary gear carrier are connected by a third fastener, and multiple third fasteners are provided around the axis of the end cap.

9. The drive axle wheel-side structure for engineering machinery as described in claim 8, characterized in that, An adjusting support is provided at the end axis position of the half shaft, and the adjusting support abuts against the limiting block of the end cover; the adjusting support and the half shaft are threaded together, and the half shaft is limited by the adjusting support.

10. The drive axle wheel-side structure for engineering machinery as described in claim 1, characterized in that, A brake disc is provided at the other end of the wheel hub, and the brake disc is connected to the wheel hub by a fourth fastener.

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