Forklift driving assembly

Abstract

The utility model provides a forklift driving assembly, and belongs to the technical field of forklifts. The problem that an existing forklift driving assembly is insufficient in operation stability is solved. The forklift driving assembly comprises a machine base, a driving assembly and a wheel axle which is horizontally arranged and can rotate in the circumferential direction, a lining axially fixed relative to the machine base is horizontally arranged in the machine base, the driving assembly is connected with the lining and can drive the lining to rotate in the circumferential direction, one end of the wheel axle is detachably inserted into the lining and is axially fixed relative to the lining, and the other end of the wheel axle is connected with the driving assembly. The wheel shaft is connected with the lining through a spline. The driving assembly has the advantages of being convenient to disassemble and assemble, and meanwhile the operation stability of the driving assembly can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of forklift technology and relates to a forklift drive assembly. Background Technology

[0002] Electric forklifts, as essential equipment in modern warehousing and logistics, have gradually replaced traditional internal combustion forklifts due to their environmental friendliness, economy, and high efficiency. The drive assembly is the core component of an electric forklift, primarily responsible for power transmission and control; its design directly impacts the forklift's performance and reliability.

[0003] A forklift drive assembly typically includes a base and a motor, gearbox, transmission system, and wheels mounted on the base. In conventional technology, bearings and gears are usually directly mounted on the axles to achieve mounting and power transmission. For example, a forklift motor drive wheel assembly disclosed in Chinese patent literature (application number: 201821790728.9) includes a main housing with wheel grooves at the bottom. A drive wheel axle passes through the housing, and one end of the axle has a cap. The other end of the axle is threaded with a nut. Tightening the nut allows it to abut against the outer surface of a side cover and against the outer surface of the main housing, thus fixing the axle. Although the drive wheel of this forklift motor drive assembly can be removed by unscrewing the nut and pulling out the axle, it still has the following shortcomings in actual use: Like conventional technology, both ends of the axle are connected to the housing (or base) via bearings, and the output gear is directly mounted on the axle for power transmission. However, because forklifts need to handle heavy loads, requiring good installation stability for the axle, the axle and bearing are usually interference-fitted. This means that when disassembling the axle, a special tool is needed to remove it from the bearing, resulting in cumbersome and laborious disassembly. Furthermore, since the output gear is mounted on the axle, removing the axle affects the installation and alignment of the output gear. Therefore, when reinstalling the axle, the position of the output gear needs to be moved or adjusted. However, the limited space within the housing for the output gear makes the entire operation quite troublesome. Therefore, this forklift motor drive wheel assembly still presents problems with installation and maintenance. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a forklift drive assembly that solves the problems of cumbersome installation and maintenance of existing forklift drive assemblies.

[0005] The objective of this utility model can be achieved through the following technical solution: A forklift drive assembly, comprising a base, a drive component, and a horizontally arranged axle capable of circumferential rotation, characterized in that a bushing is horizontally arranged inside the base and axially fixed relative to the base; the drive component is connected to the bushing and can drive the bushing to rotate circumferentially; one end of the axle is detachably inserted into the bushing and axially fixed relative to the bushing; and the axle and the bushing are connected by a spline.

[0006] Because a bushing is axially fixed within the base, and the drive assembly connects to the bushing to rotate it, while the axle is connected to the bushing via a spline, the drive assembly rotates the bushing, which in turn drives the axle synchronously. Therefore, there is no need to install gears on the axle for power transmission. In this structure, the bushing acts as an intermediary, separating the axle from the gearbox. This eliminates the need to disassemble the gearbox when removing the axle, thus preserving the installation and alignment of gears within the gearbox. Furthermore, installing the axle does not require moving or adjusting the position of gears within the gearbox, making the installation and removal of the axle extremely convenient.

[0007] Furthermore, since the drive end of the axle extends into and is supported by the bushing, the problem of high friction during axle disassembly, which would have been caused by mounting a bearing on the drive end of the axle, is avoided. When installing the axle, simply push the drive end into the bushing, adjust the circumferential position of the axle appropriately to align the splines between the axle and the bushing, and then push the axle into place. This completes the axle installation. Therefore, the installation and disassembly of the axle are very convenient and effortless, giving this drive assembly the advantage of easy installation and maintenance.

[0008] In the forklift drive assembly described above, the base includes a main boom and a secondary boom disposed opposite to the main boom. A first bearing is fixedly mounted on the lower end of the secondary boom, and the other end of the axle is supported by the first bearing. The forklift drive assembly also includes a travel wheel, which is located between the main boom and the secondary boom and connected to the middle of the axle. In this design, the travel wheel is mounted in the middle of the axle, while both ends of the axle are supported by the first bearing and bushings, respectively, giving the axle good installation stability and balance. This makes the forklift more stable during travel and allows the forklift to achieve a higher load capacity.

[0009] In the forklift drive assembly described above, the end of the axle inserted into the bushing is the drive end of the axle. The outer peripheral wall of the axle has a limiting surface facing the drive end, which abuts against the inner ring end face of the first bearing. A locking nut is threaded onto the drive end of the axle. When the locking nut is tightened, it abuts against the bushing axially, thus fixing the axle axially relative to the bushing. Since the inner ring of the first bearing rotates synchronously with the axle, abutting the limiting surface of the axle against the inner ring end face of the first bearing not only does not affect the normal rotation of the axle but also, in conjunction with the locking nut, achieves axial fixation of the axle. By removing the locking nut, the axle can be pulled out, allowing for replacement of the axle or the wheels.

[0010] In the forklift drive assembly described above, the traveling wheel has a cylindrical mounting portion. The middle portion of the axle passes through the mounting portion and is connected to it via a spline. The outer peripheral wall of the axle has a stepped surface facing the bushing. This stepped surface abuts against the mounting portion along the axial direction of the axle, and the adjacent end faces of the mounting portion and the bushing abut against each other. Specifically, the stepped surface abuts against the inner peripheral wall of the mounting portion along the axial direction of the axle. The spline connection between the middle portion of the axle and the mounting portion allows the axle to rotate synchronously with the traveling wheel. By having the stepped surface abut against the inner peripheral wall of the mounting portion along the axial direction of the axle, and simultaneously having the adjacent end faces of the mounting portion and the bushing abut against each other, the normal rotation of the traveling wheel is not affected, and the mounting portion of the traveling wheel is axially fixed. This ensures good rotational stability of the traveling wheel during forklift operation, guaranteeing greater stability during forklift travel. Compared to existing technologies where the wheels rest against the bearing end face, bushings offer better axial load capacity than bearings, thus providing better bearing support for the wheels and improving the stability and service life of the drive assembly.

[0011] In the forklift drive assembly described above, the main boom includes a main body and an annular mounting end cover detachably connected to the side of the main body. One end of the bushing is fitted with a bevel gear that rotates synchronously with it. The bevel gear is rotatably mounted on the mounting end cover via a second bearing. The other end of the bushing is rotatably mounted on the main body via a third bearing.

[0012] Preferably, the mounting end cap is bolted to the main body. This design allows the drive assembly to be assembled by first assembling the bevel gear, second bearing, and mounting end cap into a single unit, then fitting the entire assembly onto the bushing and tightening the bolts on the mounting end cap. This simplifies the assembly and maintenance of the drive assembly. Furthermore, this design ensures good installation stability for the bushing due to the support at both ends, thus stably supporting the rotation of the wheel axle and improving the operational stability of the drive assembly.

[0013] In the forklift drive assembly described above, the bevel gear has an inner bore, and one end of the bushing passes through this inner bore and is connected to it via a spline. This structure allows the bevel gear to rotate synchronously with the bushing, while the spline connection simplifies the installation between the bushing and the bevel gear.

[0014] In the forklift drive assembly described above, the bushing has a stepped surface two on its outer peripheral wall near the mounting end cover, facing the mounting end cover. The other end has a radially protruding annular flange on its outer peripheral wall. The stepped surface two abuts against the inner wall of the gear bore along the axial direction of the bushing, and the annular flange abuts against the end face of the third bearing facing the mounting end cover. This design allows the bushing to be axially fixed after the mounting end cover is installed, thereby stably supporting the rotation of the wheel axle and improving the operational stability of the drive assembly.

[0015] In the forklift drive assembly described above, the upper end of the main boom has an extension extending horizontally above the travel wheel, and the upper end of the auxiliary boom is detachably connected to the extension.

[0016] In this drive assembly, the auxiliary boom and main boom are not integrally formed. Instead, the auxiliary boom is bolted to the main boom. This design allows the auxiliary boom to be installed on high-load forklifts to provide end-to-end support for the wheel axles, enabling the forklift to achieve a higher load capacity. Conversely, when the drive assembly is used on lower-load forklifts, the auxiliary boom is unnecessary, thus reducing costs. Therefore, without altering the structure of the main boom and drive components, this drive assembly can meet different load requirements by selectively installing or omitting the auxiliary boom. The design achieves structural versatility for the main boom and drive components, reducing manufacturing costs for companies producing different forklift drive assemblies.

[0017] In the forklift drive assembly described above, the drive component includes a drive motor and a drive shaft, an intermediate shaft, and a transmission shaft, all vertically mounted within the base. The drive motor is connected to the drive shaft and drives it to rotate. The drive shaft has a primary drive gear, the upper end of the transmission shaft has a secondary driven gear, and the lower end has a bevel gear. The intermediate shaft has a primary driven gear meshing with the primary drive gear and a secondary drive gear meshing with the secondary driven gear. The bevel gear meshes with the bevel gear. This structure allows the drive motor to rotate, sequentially driving the bevel gear through the drive shaft, intermediate shaft, and transmission shaft, thereby causing the bushing and axle to rotate synchronously, ultimately enabling the forklift to move.

[0018] In the forklift drive assembly described above, the inner peripheral wall of the bushing has a stepped surface four, and when the locking nut is tightened, the locking nut can abut against the stepped surface four along the axial direction.

[0019] In the forklift drive assembly described above, the end of the axle inserted into the bushing is the drive end of the axle. The outer peripheral wall of the axle has a limiting surface facing the drive end of the axle. The traveling wheel has a cylindrical mounting part. The axle passes through the mounting part and is connected to the mounting part by a spline. The two end faces of the mounting part abut against the limiting surface and the end face of the bushing facing the traveling wheel, respectively.

[0020] The axle is connected to the mounting section via a spline, allowing the axle to rotate synchronously with the travel wheel. The mounting section's two end faces abut against the limiting surface and the bushing's end face facing the travel wheel, respectively. This not only avoids affecting the normal rotation of the travel wheel but also axially fixes the mounting section, ensuring good rotational stability of the travel wheel during forklift operation and making the forklift's movement more stable.

[0021] In the forklift drive assembly described above, the lower end of the auxiliary boom has a mounting hole, and a cover is detachably connected to the side of the auxiliary boom facing away from the main boom. The inner wall of the mounting hole has a stepped surface three facing the cover, and the two end faces of the outer ring of the first bearing abut against the cover and the stepped surface three, respectively. Preferably, the cover is bolted to the auxiliary boom. This design allows the wheel axle and the first bearing to be removed together by removing the cover, making wheel axle disassembly very convenient.

[0022] In the forklift drive assembly described above, the outer peripheral wall of the axle also has an abutment surface facing away from the drive end of the axle. This abutment surface abuts against the inner ring end face of the first bearing facing the direction of the traveling wheel. Since the inner ring of the first bearing rotates synchronously with the axle, abutting the abutment surface on the axle against the inner ring end face of the first bearing not only does not affect the normal rotation of the axle, but also achieves axial fixation of the axle in conjunction with the limiting surface. This structural design eliminates the need for a locking nut at the drive end of the axle. Of course, a locking nut can still be installed at the drive end of the axle as usual to further improve the stability of the axle fixation.

[0023] Compared with existing technologies, this forklift drive assembly has the following advantages:

[0024] 1. When it is necessary to disassemble the axle or the wheel, simply remove the cover and the cover plate located outside the locking nut, and then remove the locking nut. At this time, the axial fixation of the axle is released, so the axle can be pulled out to disassemble the axle or the wheel. Conversely, the axle or the wheel can be installed. Disassembly and installation are very convenient.

[0025] 2. The traveling wheels are installed in the middle of the axle, and the two ends of the axle are supported by the first bearing and the bushing, respectively, which makes the axle have good installation stability and balance. This makes the forklift travel more stable and allows the forklift to achieve a higher load capacity.

[0026] 3. The auxiliary boom and main boom are not integrally formed; instead, the auxiliary boom is connected to the main boom using bolts. This design allows the forklift drive assembly to meet different load requirements by selectively installing or omitting the auxiliary boom, without altering the structure of the main boom and drive components. This design achieves structural versatility for the main boom and drive components, reducing manufacturing costs for companies producing drive assemblies for different forklift models.

[0027] 4. The second and third bearings are located on both sides of the bevel gear on the drive shaft to support the bushing, thus ensuring that both ends of the bushing are supported. This ensures that the bushing has good installation stability, which in turn can stably support the rotation of the wheel axle and improve the operating stability of the drive assembly. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of Embodiment 1 of the forklift drive assembly.

[0029] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0031] Figure 4 This is a partial cross-sectional view of Embodiment 1 of the forklift drive assembly.

[0032] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0033] Figure 6 This is a three-dimensional structural diagram of the driving component.

[0034] Figure 7 This is a cross-sectional view of Embodiment 2 of the forklift drive assembly.

[0035] In the diagram: 1. Base; 1a. Main boom body; 1a1. Main body; 1a2. Mounting end cover; 1a3. Extension; 1b. Secondary boom body; 1b1. Mounting hole; 1b2. Step surface three; 2. Wheel axle; 21. Transmission end; 22. Limiting surface; 23. Step surface one; 24. Abutment surface; 3. Bushing; 31. Internal spline; 32. Step surface two; 33. Annular flange; 34. Step surface four; 4. Locking nut; 5. First bearing; 6. Traveling wheel; 61. Mounting part; 7. Bevel gear; 71. Gear inner hole; 8. Second bearing; 9. Third bearing; 10. Protective cover; 11. Drive shaft; 12. Intermediate shaft; 13. Transmission shaft; 131. Bevel gear part; 14. First-stage drive gear; 15. Second-stage driven gear; 16. First-stage driven gear; 17. Second-stage drive gear; 18. Oil seal; 19. Locking bolt. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] Example 1

[0038] like Figure 1 As shown, the forklift drive assembly includes a base 1, a drive assembly, and a horizontally arranged axle 2 that can rotate circumferentially. A bushing 3 is horizontally arranged inside the base 1 and is axially fixed relative to the base 1. The drive assembly is connected to the bushing 3 and can drive the bushing 3 to rotate circumferentially. One end of the axle 2 is detachably inserted into the bushing 3 and is axially fixed relative to the bushing 3. The axle 2 and the bushing 3 are connected by a spline.

[0039] Furthermore, such as Figure 1 As shown, the base 1 includes a main boom 1a and a secondary boom 1b disposed opposite to the main boom 1a. A first bearing 5 is fixedly disposed at the lower end of the secondary boom 1b, and the other end of the wheel axle 2 is supported by the first bearing 5. The forklift drive assembly also includes a traveling wheel 6, which is located between the main boom 1a and the secondary boom 1b and connected to the middle of the wheel axle 2. Specifically, the upper end of the main boom 1a has an extension 1a3 extending horizontally above the traveling wheel 6, and the upper end of the secondary boom 1b is detachably connected to the extension 1a3.

[0040] like Figure 1 As shown, the lower end of the auxiliary arm body 1b has a mounting hole 1b1. A cover 10 is detachably connected to the side of the auxiliary arm body 1b facing away from the main arm body 1a. The inner wall of the mounting hole 1b1 has a stepped surface 3 1b2 facing the cover 10. The two end faces of the outer ring of the first bearing 5 abut against the cover 10 and the stepped surface 3 1b2, respectively.

[0041] like Figure 1As shown, the end of the axle 2 inserted into the bushing 3 is the drive end 21 of the axle 2. The outer peripheral wall of the axle 2 has a limiting surface 22 facing the drive end 21. The limiting surface 22 abuts against the inner ring end face of the first bearing 5. A locking nut 4 is threadedly connected to the drive end 21 of the axle 2. When the locking nut 4 is tightened, it abuts against the bushing 3 axially, thus fixing the axle 2 axially relative to the bushing 3. There can be one or two locking nuts 4. The specific abutment structure between the locking nut 4 and the bushing 3 is as follows... Figure 3 and Figure 4 As shown, the inner peripheral wall of the bushing 3 has a stepped surface 34. When the locking nut 4 is tightened, the locking nut 4 can abut against the stepped surface 34 along the axial direction.

[0042] like Figure 1 and Figure 2 As shown, the traveling wheel 6 has a cylindrical mounting part 61. The middle part of the wheel axle 2 passes through the mounting part 61 and is connected to the mounting part 61 by a spline. The outer peripheral wall of the wheel axle 2 has a stepped surface 23 facing the bushing 3. The stepped surface 23 abuts against the mounting part 61 along the axial direction of the wheel axle 2. The adjacent end faces of the mounting part 61 and the bushing 3 abut against each other.

[0043] like Figure 4 and Figure 5 As shown, the main boom body 1a includes a main body 1a1 and an annular mounting end cover 1a2 detachably connected to the side of the main body 1a1. One end of the bushing 3 is fitted with a bevel gear 7 that rotates synchronously with it. The bevel gear 7 is rotatably mounted on the mounting end cover 1a2 via a second bearing 8. The other end of the bushing 3 is rotatably mounted on the main body 1a1 via a third bearing 9. The bevel gear 7 has a gear inner hole 71, and one end of the bushing 3 passes through the gear inner hole 71 and is connected to the gear inner hole 71 via a spline.

[0044] like Figures 3 to 5 As shown, the bushing 3 has a stepped surface 32 on its outer peripheral wall near the mounting end cover 1a2, facing the mounting end cover 1a2. The other end has a radially protruding annular flange 33 on its outer peripheral wall. The stepped surface 32 abuts against the inner wall of the gear bore 71 along the axial direction of the bushing 3, and the annular flange 33 abuts against the end face of the third bearing 9 facing the mounting end cover 1a2. This design allows the bushing 3 to be axially fixed after the mounting end cover 1a2 is installed, thus stably supporting the rotation of the wheel axle 2 and improving the operational stability of the drive assembly.

[0045] like Figure 4 and Figure 6As shown, the drive assembly includes a drive motor and a drive shaft 11, an intermediate shaft 12, and a transmission shaft 13, all vertically mounted within the base 1. The drive motor is connected to the drive shaft 11 and can drive the drive shaft 11 to rotate. The drive shaft 11 is equipped with a primary drive gear 14. The upper end of the transmission shaft 13 is equipped with a secondary driven gear 15, and the lower end has a bevel gear 131. The intermediate shaft 12 is equipped with a primary driven gear 16 that meshes with the primary drive gear 14 and a secondary drive gear 17 that meshes with the secondary driven gear 15. The bevel gear 131 meshes with the bevel gear 7. This structure allows the drive motor to rotate, sequentially driving the bevel gear 7 through the drive shaft 11, intermediate shaft 12, and transmission shaft 13, thereby driving the bushing 3 and the wheel axle 2 to rotate synchronously, ultimately enabling the forklift to move.

[0046] When it is necessary to disassemble axle 2 or traveling wheel 6, such as Figure 1 As shown, first remove the cover 10 and the cover plate located outside the locking nut 4, then remove the locking nut 4. At this time, the axial fixation of the wheel axle 2 is released, so the wheel axle 2 can be pulled out to disassemble the wheel axle 2 or the traveling wheel 6. Conversely, the wheel axle 2 or the traveling wheel 6 can be installed. Disassembly and installation are very convenient.

[0047] Example 2

[0048] This embodiment is basically the same as embodiment one in structure and principle, except that: Figure 7 As shown, the end of the axle 2 inserted into the bushing 3 is the drive end 21 of the axle 2. The outer peripheral wall of the axle 2 has a limiting surface 22 facing the drive end 21 of the axle 2. The traveling wheel 6 has a cylindrical mounting part 61. The axle 2 passes through the mounting part 61 and is connected to the mounting part 61 by a spline. The two end faces of the mounting part 61 abut against the limiting surface 22 and the end face of the bushing 3 facing the traveling wheel 6, respectively. The outer peripheral wall of the axle 2 also has a contact surface 24 facing away from the drive end 21 of the axle 2. The contact surface 24 abuts against the inner ring end face of the first bearing 5 facing the traveling wheel 6.

[0049] This design eliminates the need for the locking nut 4 on the drive end 21 of the axle 2. Of course, the locking nut 4 can still be installed on the drive end 21 of the axle 2 as usual to further improve the stability of the axle 2.

[0050] When it is necessary to disassemble axle 2 or traveling wheel 6, such as Figure 7 As shown, first remove the cover 10. At this time, since the axial fixation of the first bearing 5 is released, the wheel axle 2 and the first bearing 5 can be pulled out, thus disassembling the wheel axle 2 or the traveling wheel 6. Conversely, the wheel axle 2 or the traveling wheel 6 can be installed. Disassembly and installation are very convenient.

[0051] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0052] Although this article uses the following terms extensively: 1. Base; 1a. Main boom body; 1a1. Main body; 1a2. Mounting end cover; 1a3. Extension; 1b. Secondary boom body; 1b1. Mounting hole; 1b2. Step surface three; 2. Wheel axle; 21. Transmission end; 22. Limiting surface; 23. Step surface one; 24. Abutment surface; 3. Bushing; 31. Internal spline; 32. Step surface two; 33. Annular flange; 34. Step surface four; 4. Locking nut; 5. First The terminology used includes: 6. Bearing; 7. Traveling wheel; 8. Mounting part; 9. Bevel gear; 10. Gear inner hole; 11. Second bearing; 12. Third bearing; 13. Protective cover; 14. Drive shaft; 15. Intermediate shaft; 16. Transmission shaft; 17. Bevel gear section; 18. First-stage driving gear; 19. Second-stage driven gear; 10. First-stage driven gear; 10. Second-stage driving gear; 11. Oil seal; 12. Locking bolt, etc., but the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A forklift drive assembly, comprising a base (1), a drive assembly, and a horizontally arranged, circumferentially rotatable axle (2), characterized in that, A bushing (3) is horizontally arranged inside the base (1) and is axially fixed relative to the base (1). The drive assembly is connected to the bushing (3) and can drive the bushing (3) to rotate circumferentially. One end of the axle (2) is detachably inserted into the bushing (3) and is axially fixed relative to the bushing (3). The axle (2) and the bushing (3) are connected by a spline.

2. The forklift drive assembly according to claim 1, characterized in that, The base (1) includes a main boom (1a) and a secondary boom (1b) disposed opposite to the main boom (1a). A first bearing (5) is fixedly disposed at the lower end of the secondary boom (1b). The other end of the wheel axle (2) is supported by the first bearing (5). The forklift drive assembly also includes a traveling wheel (6). The traveling wheel (6) is located between the main boom (1a) and the secondary boom (1b) and connected to the middle of the wheel axle (2).

3. The forklift drive assembly according to claim 2, characterized in that, One end of the axle (2) inserted into the bushing (3) is the drive end (21) of the axle (2). The outer peripheral wall of the axle (2) has a limiting surface (22) facing the drive end (21) of the axle (2). The limiting surface (22) abuts against the inner ring end face of the first bearing (5). The drive end (21) of the axle (2) is threadedly connected to a locking nut (4). When the locking nut (4) is tightened, the locking nut (4) can abut against the bushing (3) in the axial direction, so that the axle (2) is axially fixed relative to the bushing (3).

4. The forklift drive assembly according to claim 3, characterized in that, The walking wheel (6) has a cylindrical mounting part (61). The middle part of the wheel axle (2) passes through the mounting part (61) and is connected to the mounting part (61) by a spline. The outer peripheral wall of the wheel axle (2) has a stepped surface (23) facing the bushing (3). The stepped surface (23) abuts against the mounting part (61) along the axial direction of the wheel axle (2). The adjacent end faces of the mounting part (61) and the bushing (3) abut against each other.

5. The forklift drive assembly according to claim 2, 3, or 4, characterized in that, The main arm body (1a) includes a main body (1a1) and an annular mounting end cover (1a2) detachably connected to the side of the main body (1a1). One end of the bushing (3) is fitted with a bevel gear (7) that rotates synchronously with it. The bevel gear (7) is rotatably mounted on the mounting end cover (1a2) via a second bearing (8). The other end of the bushing (3) is rotatably mounted on the main body (1a1) via a third bearing (9).

6. The forklift drive assembly according to claim 5, characterized in that, The bevel gear (7) has a gear inner hole (71), and one end of the bushing (3) passes through the gear inner hole (71) and is connected to the gear inner hole (71) by a spline.

7. The forklift drive assembly according to claim 6, characterized in that, The bushing (3) has a stepped surface (32) on its outer peripheral wall near the mounting end cover (1a2) facing the mounting end cover (1a2), and a radially protruding annular flange (33) on its outer peripheral wall at the other end. The stepped surface (32) abuts against the inner wall of the gear inner hole (71) along the axial direction of the bushing (3), and the annular flange (33) abuts against the end face of the third bearing (9) facing the mounting end cover (1a2).

8. The forklift drive assembly according to claim 2, characterized in that, The end of the axle (2) inserted into the bushing (3) is the drive end (21) of the axle (2). The outer peripheral wall of the axle (2) has a limiting surface (22) facing the drive end (21) of the axle (2). The traveling wheel (6) has a cylindrical mounting part (61). The axle (2) passes through the mounting part (61) and is connected to the mounting part (61) by a spline. The two end faces of the mounting part (61) abut against the limiting surface (22) and the end face of the bushing (3) facing the traveling wheel (6), respectively.

9. The forklift drive assembly according to claim 8, characterized in that, The lower end of the auxiliary arm body (1b) has a mounting hole (1b1). A cover (10) is detachably connected to the side of the auxiliary arm body (1b) facing away from the main arm body (1a). The inner wall of the mounting hole (1b1) has a stepped surface three (1b2) facing the cover (10). The two end faces of the outer ring of the first bearing (5) abut against the cover (10) and the stepped surface three (1b2) respectively.

10. The forklift drive assembly according to claim 9, characterized in that, The outer peripheral wall of the axle (2) also has an abutment surface (24) facing away from the drive end (21) of the axle (2), and the abutment surface (24) abuts against the inner ring end face of the first bearing (5) facing the traveling wheel (6).

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