A drive shaft and drive axle which is easy to manufacture, install and maintain

Abstract

The utility model discloses a transmission shaft convenient to manufacture, install and overhaul, including sun wheel axle and long half axle, one end axis of sun wheel axle is provided with the threaded hole, and one segment of long half axle is provided with the threaded joint, and the threaded joint is connected with the threaded hole in screw threads, and the key sleeve is installed in the connecting place of sun wheel axle and long half axle, and the key sleeve is connected with the sun wheel axle, and the long half axle is provided with the snap spring groove, and the elastic check ring is installed in the snap spring groove, and the elastic check ring is attached to the one end of key sleeve away from the sun wheel axle, the utility model discloses the sun wheel axle and long half axle are designed as the split type threaded connection structure, reduce the deformation risk in heat treatment and machining process, reduce the dependence to high accuracy equipment, improve the yield and reduce the manufacturing cost, through the key connection cooperation of threaded connection and key sleeve, realize the radial and axial positioning locking of long half axle and sun wheel axle, and the operation is simple and reliable, and the process does not need special tool, and the assembly and disassembly efficiency are improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, specifically to a transmission shaft and drive axle that are easy to manufacture, install and maintain. Background Technology

[0002] In the design of drive shafts for traditional engineering machinery, integrated drive shaft structures are widely used. This structure forges or welds the sun gear shaft and half-shaft into a single unit, ensuring structural strength, but it has significant drawbacks in manufacturing and maintenance. During manufacturing, due to the large size and complex structure of the drive shaft, the integrated structure is prone to bending deformation during heat treatment and machining, resulting in low yield and poor manufacturability. Simultaneously, its rigid structure places stringent requirements on the precision of machining equipment, further increasing manufacturing costs. In maintenance scenarios, when the drive shaft needs to be disassembled from the integrated axle housing, the lack of modular design often leaves the long half-shaft stuck deep within the axle housing after the sun gear shaft is removed, making direct removal difficult. This forces maintenance personnel to use destructive methods or completely disassemble the axle housing, significantly reducing maintenance efficiency and increasing downtime costs. These defects severely restrict the maintainability and economic efficiency of the equipment. The disassembly process requires specialized tools or removal of surrounding components, making the operation cumbersome and time-consuming. Therefore, there is an urgent need for a drive shaft and drive axle that are easy to manufacture, install, and maintain. Utility Model Content

[0003] The purpose of this invention is to provide a transmission shaft and drive axle that are easy to manufacture, install and maintain, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a transmission shaft that is easy to manufacture, install, and maintain, comprising a sun gear shaft and a long half-shaft. One end of the sun gear shaft has a threaded hole, and a section of the long half-shaft has a threaded joint. The threaded joint is threadedly connected to the threaded hole. A key sleeve is fitted at the connection between the sun gear shaft and the long half-shaft, and the key sleeve is keyed to the sun gear shaft. A retaining ring groove is provided on the long half-shaft, and an elastic retaining ring is installed in the retaining ring groove. The elastic retaining ring fits against the end of the key sleeve away from the sun gear shaft.

[0005] Furthermore, the key sleeve is fitted onto the inner wall of one end of the sun gear shaft, which has a spline, and the outer wall of the sun gear shaft has a spline groove that mates with the spline, and the spline and the spline groove form a key connection.

[0006] Furthermore, the length of the sun gear shaft is less than that of the long half-shaft.

[0007] Furthermore, the outer diameter of the elastic retaining ring is larger than the inner diameter of the key sleeve.

[0008] A drive axle that is easy to manufacture, install and maintain includes the drive shaft described in any of the above claims, and also includes an axle housing. A central assembly is installed in the middle of the axle housing. Brake calipers are provided on both sides of the axle housing. Wheel rim assemblies are provided on the outer sides of the brake calipers. The end of the sun gear shaft away from the long half-shaft is connected to the wheel rim assembly, and the end of the long half-shaft away from the sun gear shaft is connected to the central assembly.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This utility model significantly reduces the risk of deformation during heat treatment and machining by designing the sun gear shaft and the long half shaft as a separate threaded connection structure. The separate parts can be processed independently, simplifying the process complexity, reducing the dependence on high-precision equipment, effectively improving the yield and reducing the manufacturing cost. This invention achieves radial and axial positioning and locking of the long half-shaft and the sun gear shaft through a combination of threaded connection and keyed sleeve key connection. The operation is simple and reliable. This process does not require special tools and significantly improves assembly efficiency. This invention avoids the problem of the long half-shaft remaining inside the axle housing during the disassembly of the sun gear shaft by using a threaded connection, thus facilitating maintenance operations. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of the middle section (I).

[0011] In the diagram: 1: Wheel assembly 2: Brake caliper 3: Brake caliper 4: Axle housing 5: Central assembly 6: Long half shaft 7: Elastic retaining ring 8: Key sleeve 9: Sun gear shaft. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] This utility model provides a transmission shaft and drive axle that are easy to manufacture, install and maintain. Example 1

[0014] like Figure 1 As shown, this embodiment provides a drive shaft that is easy to manufacture, install, and maintain, comprising: Sun gear shaft 9: One end of the shaft has a threaded hole machined in it, and the other end is connected to the wheel rim assembly. The length of the sun gear shaft 9 is designed to be less than that of the long half-shaft 6 to reduce the difficulty of machining.

[0015] Long half-shaft 6: One end is machined with a threaded joint, the thread specification matching the threaded hole; the other end is connected to the central assembly 5. A ring-shaped retaining ring groove is opened near the threaded joint on the long half-shaft 6.

[0016] Key sleeve 8: It is fitted at the connection between the sun gear shaft 9 and the long half shaft 6. Splines are machined on its inner wall, and spline grooves are machined on the corresponding outer wall of the sun gear shaft 9. The splines and spline grooves mesh to form a key connection, ensuring the reliability of torque transmission.

[0017] Elastic retaining ring 7: Installed in the retaining ring groove, its outer diameter is larger than the inner diameter of the key sleeve 8, and is used to axially limit the key sleeve 8.

[0018] Assembly process: Pre-installed key sleeve 8: Slide the key sleeve 8 into the threaded end of the long half shaft 6 so that it is temporarily fitted on the long half shaft 6.

[0019] Threaded connection: Screw the threaded hole of the sun gear shaft 9 into the threaded joint of the long half shaft 6 for fastening.

[0020] Key sleeve 8 positioning: Slide key sleeve 8 along the long half shaft 6 axially so that its spline is fully engaged with the spline groove of the sun gear shaft 9.

[0021] Axial locking: The elastic retaining ring 7 is inserted into the retaining ring groove of the long half-shaft 6, and the outer side of the retaining ring is in close contact with the end face of the key sleeve 8 to prevent the key sleeve 8 from moving axially. Example 2

[0022] like Figure 1 As shown, this embodiment also provides a drive bridge, including: Bridge housing 4: It adopts an integral casting structure, with the central assembly 5 installed in the middle.

[0023] Drive shaft: It adopts the structure described in Embodiment 1, with the outer end of its long half shaft 6 connected to the central assembly 5, and the outer end of the sun gear shaft 9 connected to the wheel edge assembly.

[0024] Brake caliper 2: Symmetrically located on both sides of the axle housing 4, between the central assembly 5 and the wheel assembly.

[0025] Wheel-side assembly: mounted on the end of the axle housing 4 via a bearing, receiving torque transmitted by the sun gear shaft 9.

[0026] Repair and disassembly process: When the drive shaft needs to be inspected: Disconnect the connection between the wheel-side assembly and the sun gear shaft 9; Pull the sun gear shaft 9 outward directly: Since the sun gear shaft 9 and the long half shaft 6 are rigidly connected by threads, the two are pulled out from the bridge housing 4 at the same time, completely avoiding the problem of the long half shaft 6 being stuck. After disassembly, the key sleeve 8 can be separated by removing the elastic retaining ring 7 with snap ring pliers. After unscrewing the threaded connection, the sun gear shaft 9 or the long half shaft 6 can be replaced separately.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A drive shaft that is easy to manufacture, install and maintain, comprising a sun gear shaft (9) and a long half-shaft (6), characterized in that: One end of the sun gear shaft (9) has a threaded hole, and one section of the long half shaft (6) has a threaded joint. The threaded joint is threaded to the threaded hole. A key sleeve (8) is fitted at the connection between the sun gear shaft (9) and the long half shaft (6). The key sleeve (8) is keyed to the sun gear shaft (9). A retaining ring groove is provided on the long half shaft (6). An elastic retaining ring (7) is installed in the retaining ring groove. The elastic retaining ring (7) fits against the end of the key sleeve (8) away from the sun gear shaft (9).

2. The drive shaft according to claim 1, which is easy to manufacture, install, and maintain, is characterized in that: The key sleeve (8) is fitted onto the inner wall of one end of the sun gear shaft (9) and has a spline. The outer wall of the sun gear shaft (9) has a spline groove that mates with the spline. The spline and the spline groove form a key connection.

3. The drive shaft according to claim 1, which is easy to manufacture, install, and maintain, is characterized in that: The length of the sun gear shaft (9) is less than that of the long half shaft (6).

4. The drive shaft according to claim 1, which is easy to manufacture, install, and maintain, is characterized in that: The outer diameter of the elastic retaining ring (7) is larger than the inner diameter of the key sleeve (8).

5. A drive axle that is easy to manufacture, install, and maintain, comprising the drive shaft according to any one of claims 1-4, characterized in that: It also includes an axle housing (4), a central assembly (5) is installed in the middle of the axle housing (4), brake calipers (2) are provided on the outer side of the axle housing (4), wheel rim assemblies are provided on both sides of the brake calipers (2), the end of the sun gear shaft (9) away from the long half shaft (6) is connected to the wheel rim assembly, and the end of the long half shaft (6) away from the sun gear shaft (9) is connected to the central assembly (5).

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