Wheel reduction device

Abstract

The application provides a wheel-side reduction device, which comprises an axle housing assembly with an assembling space, a mounting wheel assembly with a mounting space, a bearing assembly arranged in the mounting space, a driving assembly, a rolling body assembly and a bearing assembly, part of the bearing assembly is located between the axle housing assembly and the mounting wheel assembly; part of the driving assembly is mounted in the assembling space, and another part of the driving assembly is mounted in the mounting space; the driving assembly is in transmission connection with the mounting wheel assembly and the bearing assembly, and drives the mounting wheel assembly and the bearing assembly to rotate in opposite directions at the same time; the rolling body assembly is arranged between the mounting wheel assembly and the bearing assembly; and the bearing assembly is arranged between the bearing assembly and the axle housing assembly. The wheel-side reduction device solves the problems of large wear and short service life of the existing wheel-side reduction device caused by the transmission parts needing to bear the weight.

Description

Technical Field

[0001] This invention relates to the field of wheel-side speed reduction devices, and more specifically, to a wheel-side speed reduction device. Background Technology

[0002] Wheel-end reduction gears are devices installed on vehicles to increase their driving force. They are designed to meet or correct the driving force of the vehicle's transmission system. The wheel-end reduction gears are installed at both ends of the vehicle's drive axle and then connected to the wheels, thereby further increasing the driving force of the wheels.

[0003] For electric mining dump trucks, wheel-side reduction gears are typically installed to increase the driving force of the motor on the wheels. These wheel-side reduction gears use planetary gear reducers, which consist of a sun gear, planet carrier, planet gears, and a hub. The hub has a gear ring inside that meshes with the planet gears. The sun gear is coaxially fixed to the motor's output shaft, and the planet gears mesh with it. The planet carrier is relatively fixed to the motor. When the motor is working, the motor's output shaft drives the sun gear to rotate, which in turn drives the planet gears to rotate, thus rotating the hub. During the power transmission process, the planetary gear reducer lowers the motor's speed, increasing the driving force on the wheels.

[0004] However, in the above structure, since the total mass of the mining dump truck is large after hauling goods, when using a planetary gear reducer, the wheel hub is supported by the planetary gears. Thus, the planetary gears not only bear the role of transmitting torque, but also need to carry the goods. This can easily lead to greater wear on the transmission components in the wheel-side reduction device and a shorter service life. Summary of the Invention

[0005] The main objective of this invention is to provide a wheel-side speed reduction device to solve the problem that existing wheel-side speed reduction devices suffer from excessive wear and short service life due to the weight-bearing requirements of the transmission components.

[0006] To achieve the above objectives, the present invention provides a wheel-side speed reduction device, comprising: an axle housing assembly having an assembly space; a mounting wheel assembly having an installation space; a load-bearing assembly disposed within the installation space, a portion of which is located between the axle housing assembly and the mounting wheel assembly; a drive assembly, a portion of which is installed within the assembly space, and another portion of which is installed within the installation space; the drive assembly being drivenly connected to the mounting wheel assembly and the load-bearing assembly to simultaneously drive the mounting wheel assembly and the load-bearing assembly to rotate in opposite directions; a rolling element assembly disposed between the mounting wheel assembly and the load-bearing assembly to allow relative rotation between the mounting wheel assembly and the load-bearing assembly; and a bearing assembly disposed between the load-bearing assembly and the axle housing assembly to allow the load-bearing assembly to rotate relative to the axle housing assembly.

[0007] Furthermore, the mounting wheel assembly includes a mounting wheel and an anti-detachment bracket detachably connected to the mounting wheel; when the mounting wheel and the anti-detachment bracket are connected, the mounting wheel and the anti-detachment bracket are relatively fixed; the drive assembly is drivenly connected to the mounting wheel; the rolling assembly includes a rolling component and a first roller, the rolling component being disposed between the mounting wheel and the load-bearing assembly, and the first roller being disposed between the anti-detachment bracket and the load-bearing assembly.

[0008] Furthermore, the mounting wheel has an annular mounting groove arranged around the rotation axis of the mounting wheel; the rolling element component includes a support frame and multiple rolling elements, which are spaced apart along the circumferential direction of the mounting groove; each rolling element is rotatably mounted on the support frame, and the rotation axis of each rolling element is parallel to the rotation axis of the mounting wheel; at least a portion of each rolling element is located within the mounting groove.

[0009] Furthermore, the axle housing assembly includes an axle housing and a support ring, the axle housing having a cavity; the axle housing and the support ring are fixedly connected, and the annular holes of the cavity and the support ring communicate to jointly form an assembly space; a flange is provided on the outer peripheral wall of the axle housing; the bearing assembly includes a bearing and a second roller, the bearing being disposed between the load-bearing assembly and the support ring so that the load-bearing assembly can rotate relative to the support ring; the second roller being disposed between the load-bearing assembly and the flange so that the load-bearing assembly can rotate relative to the axle housing.

[0010] Furthermore, the outer peripheral surface of the axle housing is cylindrical; the flange is an annular structure surrounding the central axis of the outer peripheral surface of the axle housing; the central axis of the outer peripheral surface of the axle housing coincides with the rotation axis of the mounting wheel assembly; along the extension direction of the central axis of the outer peripheral surface of the axle housing, the axle housing has a first end and a second end disposed opposite to each other; a support ring is connected to the second end of the axle housing; the flange has an annular first contact surface; from the first end to the second end of the axle housing, the first contact surface gradually moves away from the central axis of the outer peripheral surface of the axle housing; the load-bearing assembly has a second contact surface; from the second end to the first end of the axle housing, the first contact surface is offset by a first distance to coincide with the second contact surface; a second roller is disposed between the first contact surface and the second contact surface.

[0011] Furthermore, the load-bearing component has an annular third contact surface arranged around the rotation axis of the mounting wheel; along the axial direction of the mounting wheel, the third contact surface gradually moves away from the rotation axis of the mounting wheel; the anti-detachment bracket has a fourth contact surface; along the axial direction of the mounting wheel, the third contact surface is offset by a second distance to coincide with the fourth contact surface; a first roller is disposed between the third contact surface and the fourth contact surface.

[0012] Further, the drive assembly includes: a drive motor; a first bevel gear, the drive motor being fixedly connected to the first bevel gear, the central axis of the output shaft of the drive motor coinciding with the central axis of the first bevel gear; a second bevel gear, the second bevel gear meshing with the first bevel gear, the central axis of the second bevel gear being perpendicular to the central axis of the first bevel gear; a third bevel gear, the third bevel gear being fixedly connected to the second bevel gear, the central axis of the third bevel gear coinciding with the central axis of the second bevel gear; a load-bearing assembly including a first transmission bevel gear, and a mounting wheel assembly including a second transmission bevel gear; the third bevel gear meshes with the first transmission bevel gear and also meshes with the second transmission bevel gear to drive the first and second transmission bevel gears to rotate in opposite directions; the central axes of the first and second transmission bevel gears both coincide with the central axis of the first bevel gear; wherein, the diameter of the outer circumferential surface of the second transmission bevel gear is larger than the diameter of the outer circumferential surface of the first bevel gear.

[0013] Furthermore, the wheel-side reduction gear also includes a mounting bracket disposed in the installation space, the mounting bracket being fixedly connected to the axle housing assembly; the mounting bracket has mounting holes; the drive assembly also includes a connecting shaft, the connecting shaft being fixedly connected to the second bevel gear and also fixedly connected to the third bevel gear; the central axis of the connecting shaft coincides with the central axis of the second bevel gear; the connecting shaft is rotatably inserted into the mounting hole.

[0014] Furthermore, the wheel-side reduction device includes a transmission mechanism, which includes a second bevel gear and a third bevel gear; there are multiple transmission mechanisms, and the second bevel gears of the multiple transmission mechanisms are distributed at intervals along the circumference of the first bevel gear; the third bevel gears of the multiple transmission mechanisms all mesh with the first transmission bevel gear, and the third bevel gears of the multiple transmission mechanisms all mesh with the second transmission bevel gear; the third bevel gears of the multiple transmission mechanisms are distributed at intervals along the circumference of the first transmission bevel gear and at intervals along the circumference of the second transmission bevel gear.

[0015] Furthermore, the load-bearing assembly has a ring-shaped structure; along the axial direction of the mounting wheel assembly, the load-bearing assembly includes a first load-bearing portion, a second load-bearing portion, a third load-bearing portion, and a fourth load-bearing portion connected in sequence; the rolling assembly includes a first roller disposed between the first load-bearing portion and the mounting wheel assembly; and / or the bearing assembly includes a second roller disposed between the first load-bearing portion and the axle housing assembly; and / or the bearing assembly includes a bearing disposed between the second load-bearing portion and the axle housing assembly; and / or the load-bearing assembly further includes a first transmission bevel gear, which is fixedly connected to the third load-bearing portion and is drively connected to the drive assembly; and / or the rolling assembly includes a rolling component disposed between the fourth load-bearing portion and the mounting wheel assembly.

[0016] Furthermore, in a direction perpendicular to the axial direction of the first bevel gear, the third bevel gear is located on the side of the second bevel gear away from the central axis of the first bevel gear; and / or the diameter of the outer circumferential surface of the first transmission bevel gear is larger than the diameter of the outer circumferential surface of the first bevel gear; and / or the diameter of the outer circumferential surface of the second bevel gear is larger than the diameter of the outer circumferential surface of the first bevel gear; and / or the diameter of the outer circumferential surface of the second bevel gear is larger than the diameter of the outer circumferential surface of the third bevel gear; and / or the end of the outer circumferential surface of the third bevel gear with a smaller diameter is positioned towards the second bevel gear; and / or the end of the outer circumferential surface of the first bevel gear with a smaller diameter is positioned away from the drive motor; and / or the end of the outer circumferential surface of the second bevel gear with a larger diameter is positioned away from the first bevel gear.

[0017] Furthermore, along the axial direction of the first bevel gear, the first transmission bevel gear and the second transmission bevel gear are located on opposite sides of the third bevel gear, and the second transmission bevel gear is located on the side of the first transmission bevel gear away from the first bevel gear; along the axial direction of the first bevel gear and from the first transmission bevel gear to the second transmission bevel gear, the diameter of the outer circumference of the first transmission bevel gear gradually decreases, and the diameter of the outer circumference of the second transmission bevel gear gradually increases.

[0018] Furthermore, the axle housing is provided with a connecting part, and the support ring is fixedly connected to the connecting part; the wheel-side reduction device also includes a mounting bracket fixedly connected to the support ring; along the axial direction of the bearing, the connecting part and the mounting bracket are respectively located on both sides of the support ring; along the direction perpendicular to the axial direction of the bearing, part of the connecting part is located on the side of the outer circumference of the support ring away from the central axis of the support ring, and part of the mounting bracket is located on the side of the outer circumference of the support ring away from the central axis of the support ring, so that both the connecting part and the mounting bracket are in contact with the bearing, thereby axially positioning the bearing.

[0019] According to the technical solution of this invention, the wheel-side reduction device includes an axle housing assembly, a mounting wheel assembly, a load-bearing assembly, a drive assembly, a rolling element assembly, and a bearing assembly. The axle housing assembly has an assembly space; the mounting wheel assembly has an installation space; the load-bearing assembly is disposed within the installation space, with a portion of the load-bearing assembly located between the axle housing assembly and the mounting wheel assembly; a portion of the drive assembly is installed within the assembly space, and another portion of the drive assembly is installed within the installation space; the drive assembly is drively connected to the mounting wheel assembly and to the load-bearing assembly, so that the drive assembly simultaneously drives the mounting wheel assembly and the load-bearing assembly to rotate in opposite directions; the rotation axis of the mounting wheel assembly and the rotation axis of the load-bearing assembly coincide; the rolling element assembly is disposed between the mounting wheel assembly and the load-bearing assembly, so that the mounting wheel assembly and the load-bearing assembly can rotate relative to each other under the action of the rolling element assembly, thereby allowing the mounting wheel assembly and the load-bearing assembly to rotate in opposite directions; the bearing assembly is disposed between the load-bearing assembly and the axle housing assembly, so that the load-bearing assembly can rotate relative to the axle housing assembly.

[0020] The wheel-side reduction gear of this application adds a load-bearing component, which is supported on the axle housing assembly by a bearing assembly. The mounting wheel assembly is rotatably connected to the load-bearing component through a rolling assembly. This allows the load-bearing force of the mounting wheel assembly to be transferred to the axle housing assembly through the load-bearing component and the bearing assembly, thereby reducing the load on the drive assembly, i.e., reducing the load on the mounting wheel assembly acting on the drive assembly. In a wheel-side reduction gear, the drive assembly necessarily includes transmission components. Therefore, the wheel-side reduction gear of this application can reduce the load on these transmission components, thereby reducing wear and tear and improving their service life. Thus, the wheel-side reduction gear of this application solves the problem of excessive wear and short service life of transmission components in existing wheel-side reduction gears due to the weight they bear. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 A schematic diagram of the wheel-side speed reduction device according to the present invention is shown;

[0023] Figure 2 An exploded structural view of the axle housing assembly and multiple mounting brackets of the wheel-side reduction device according to the present invention is shown;

[0024] Figure 3 An exploded structural diagram of the transmission mechanism of the wheel-side speed reduction device according to the present invention is shown;

[0025] Figure 4 An assembly diagram of the drive motor, first bevel gear, and multiple transmission mechanisms of the wheel-side reduction device according to the present invention is shown.

[0026] Figure 5 A schematic diagram of the rolling element component of the wheel-side reduction gear according to the present invention is shown;

[0027] Figure 6 A schematic diagram of the structure of the wheel-side speed reduction device according to the present invention, showing the rolling component disposed in the mounting groove of the mounting wheel;

[0028] Figure 7 It shows Figure 1 A magnified view of the rolling element of the wheel-side speed reducer.

[0029] The above figures include the following reference numerals:

[0030] 10. Bridge housing assembly; 101. Assembly space; 11. Bridge housing; 111. Housing cavity; 112. First outer peripheral surface; 12. Support ring; 121. Ring hole; 13. Flange portion; 131. First contact surface; 14. Connecting portion; 15. Fastener; 16. Locking element;

[0031] 20. Mounting wheel assembly; 201. Mounting space; 21. Mounting wheel; 211. Mounting groove; 22. Anti-detachment bracket; 221. Fourth contact surface; 222. Clearance opening; 23. Second transmission bevel gear; 231. Second central through hole; 24. Connecting plate;

[0032] 30. Bearing assembly; 301. First bearing part; 302. Second bearing part; 303. Third bearing part; 304. Fourth bearing part; 31. Second contact surface; 32. Third contact surface; 33. First transmission bevel gear; 331. First central through hole; 34. Clearance opening;

[0033] 41. Rolling element component; 411. Rolling element; 4111. Cam shaft; 412. Support frame; 4121. Support plate; 4122. Support plate segment; 42. First roller; 51. Bearing; 52. Second roller;

[0034] 61. Drive motor; 62. First bevel gear; 63. Second bevel gear; 631. First fixing hole; 64. Third bevel gear; 641. Second fixing hole; 642. Internal spline; 65. Connecting shaft; 651. External spline;

[0035] 70. Transmission mechanism; 71. Mounting bracket; 711. Mounting hole; 72. Tapered needle roller bearing; 73. Pressure seat; 731. Third fixing hole; 74. Nut. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] 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 this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. 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.

[0039] This invention provides a wheel-side speed reduction device; please refer to [the relevant documentation]. Figures 1 to 7 The wheel-side reduction gear includes an axle housing assembly 10, a mounting wheel assembly 20, a load-bearing assembly 30, a drive assembly, a rolling element assembly, and a bearing assembly. The axle housing assembly 10 has an assembly space 101; the mounting wheel assembly 20 has an installation space 201; the load-bearing assembly 30 is disposed within the installation space 201, with a portion of the load-bearing assembly 30 located between the axle housing assembly 10 and the mounting wheel assembly 20; a portion of the drive assembly is installed within the assembly space 101, and another portion of the drive assembly is installed within the installation space 201; the drive assembly is drive-connected to the mounting wheel assembly 20, and the drive assembly is also drive-connected to the load-bearing assembly 30. A dynamic connection is provided so that the drive assembly simultaneously drives the mounting wheel assembly 20 and the load-bearing assembly 30 to rotate in opposite directions; the rotation axis of the mounting wheel assembly 20 and the rotation axis of the load-bearing assembly 30 coincide; a roller assembly is disposed between the mounting wheel assembly 20 and the load-bearing assembly 30 so that the mounting wheel assembly 20 and the load-bearing assembly 30 can rotate relative to each other under the action of the roller assembly, thereby allowing the mounting wheel assembly 20 and the load-bearing assembly 30 to rotate in opposite directions; a bearing assembly is disposed between the load-bearing assembly 30 and the bridge housing assembly 10 so that the load-bearing assembly 30 can rotate relative to the bridge housing assembly 10.

[0040] The wheel-side reduction gear of this application adds a load-bearing component 30, which is supported on the axle housing assembly 10 by a bearing assembly. The mounting wheel assembly 20 is rotatably connected to the load-bearing component 30 through a rolling assembly. This allows the load-bearing force of the mounting wheel assembly 20 to be transferred to the axle housing assembly 10 through the load-bearing component 30 and the bearing assembly, thereby reducing the load on the drive assembly, i.e., reducing the load on the mounting wheel assembly 20 acting on the drive assembly. In a wheel-side reduction gear, the drive assembly necessarily includes transmission components. Therefore, the wheel-side reduction gear of this application can reduce the load on the transmission components, thereby reducing wear on these components and improving their service life. It is evident that the wheel-side reduction gear of this application solves the problem of excessive wear and short service life in existing wheel-side reduction gears due to the weight-bearing requirements of the transmission components.

[0041] Specifically, the wheel-side reduction device is a wheel-side reduction device for the electric wheels of mining dump trucks, and the wheel assembly 20 is used to fix the wheels of the dump truck.

[0042] In this embodiment, the mounting wheel assembly 20 includes a mounting wheel 21 and an anti-detachment bracket 22 detachably connected to the mounting wheel 21. When the mounting wheel 21 and the anti-detachment bracket 22 are connected, they are relatively fixed. The mounting wheel 21 is necessarily an annular structure, and its rotation axis is the rotation axis of the mounting wheel assembly 20. The drive assembly is connected to the mounting wheel 21 so that it drives the mounting wheel 21 to rotate, and the mounting wheel 21 drives the anti-detachment bracket 22 to rotate synchronously. The rolling assembly includes a rolling component 41 and a first roller 42. The rolling component 41 is disposed between the mounting wheel 21 and the bearing assembly 30 so that the mounting wheel 21 and the bearing assembly 30 can rotate relative to each other, thereby allowing the mounting wheel 21 and the bearing assembly 30 to rotate in opposite directions. The first roller 42 is disposed between the anti-detachment bracket 22 and the bearing assembly 30 so that the anti-detachment bracket 22 and the bearing assembly 30 can rotate relative to each other, thereby allowing the anti-detachment bracket 22 and the bearing assembly 30 to rotate in opposite directions.

[0043] Specifically, the mounting wheel 21 is used to fix the wheels of the dump truck, and the drive assembly drives the mounting wheel 21 so that the dump truck can move.

[0044] Specifically, the anti-detachment frame 22 is installed on the outside of the load-bearing component 30.

[0045] Specifically, the mounting wheel 21 and the anti-detachment bracket 22 are connected by bolts.

[0046] In this embodiment, the mounting wheel 21 has an annular mounting groove 211, which is arranged around the rotation axis of the mounting wheel 21. The rolling element component 41 includes a support frame 412 and a plurality of rolling elements 411, which are spaced apart circumferentially along the mounting groove 211. Each rolling element 411 is rotatably mounted on the support frame 412, and the rotation axis of each rolling element 411 is parallel to the rotation axis of the mounting wheel 21. At least a portion of each rolling element 411 is located within the mounting groove 211 along the radial direction of each rolling element 411.

[0047] Specifically, each roller 411 is a cylindrical structure, and the central axis of each roller 411 is its axis of rotation. When the mounting wheel assembly 20 and the bearing assembly 30 rotate in opposite directions, each roller 411 rotates around its central axis under the combined action of the mounting wheel 21 and the bearing assembly 30, and also revolves around the axis of rotation of the bearing assembly 30. During the revolving process of the roller 411 around the axis of rotation of the bearing assembly 30, the force borne by the roller 411 changes periodically. When the mounting wheel assembly 20 and the bearing assembly 30 rotate in opposite directions, the period of change of the force borne by the roller 411 is lengthened, which makes it less likely for the roller 411 to reach its yield strength during operation, thereby improving the service life of the roller 411.

[0048] Specifically, each roller 411 is disposed between the mounting wheel 21 and the bearing assembly 30; that is, the outer peripheral wall of each roller 411 is in contact with the groove wall of the mounting groove 211, and the outer peripheral wall of each roller 411 is in contact with the bearing assembly 30.

[0049] Specifically, the support frame 412 is a ring structure, and the support frame 412 is set in the mounting groove 211. The support frame 412 is arranged around the rotation axis of the mounting wheel 21; the support frame 412 is fixedly connected to the groove wall of the mounting groove 211.

[0050] Specifically, the mounting slot 211 is connected to the mounting space 201.

[0051] Specifically, the support frame 412 includes two support plates 4121 arranged opposite to each other. Both support plates 4121 are annular structures and are arranged around the rotation axis of the mounting wheel 21. Both support plates 4121 are fixedly connected to the groove wall of the mounting groove 211. Each roller 411 is arranged between the two support plates 4121 and is rotatably connected to the two support plates 4121.

[0052] Specifically, the connection between each roller 411 and the two support plates 4121 is as follows: along the axial direction of the mounting wheel 21, the roller 411 has two oppositely arranged ends; both ends of the roller 411 are provided with a convex shaft 4111, and each support plate 4121 is provided with a connecting hole. The convex shafts 4111 at both ends of the roller 411 are rotatably inserted into the connecting holes on the two support plates 4121, and the central axis of the convex shafts 4111 at both ends of the roller 411 coincides with the rotation axis of the roller 411, so that the roller 411 can rotate relative to the two support plates 4121.

[0053] Furthermore, each support plate 4121 is provided with multiple connecting holes, and the multiple connecting holes on each support plate 4121 are provided one-to-one with multiple rollers 411, so that the convex shafts 4111 at both ends of each roller 411 can be rotatably passed through the corresponding connecting holes on the two support plates 4121.

[0054] Optionally, the convex shaft 4111 at each end of each roller 411 protrudes from the corresponding connecting hole to abut against the groove wall of the mounting groove 211; the convex shaft 4111 at each end of each roller 411 is rotatably arranged relative to the groove wall of the mounting groove 211; in this way, the axial movement of each roller 411 can be reduced and the stability of the roller 411 can be improved.

[0055] Specifically, for each roller 411, the diameter of the roller 411 is greater than the depth of the mounting groove 211, so that a portion of the roller 411 is outside the mounting groove 211 so that the roller 411 contacts the carrier assembly 30.

[0056] Specifically, along the circumferential direction of the support frame 412, each support plate 4121 includes a plurality of support plate segments 4122 connected in sequence.

[0057] Furthermore, in each support plate 4121, the lengths of the multiple support plate segments 4122 are all equal, and the number of rollers 411 distributed on each support plate segment 4122 is all equal.

[0058] Furthermore, the number of support plate segments 4122 of the two support plates 4121 is equal.

[0059] In this embodiment, the bridge housing assembly 10 includes a bridge housing 11 and a support ring 12. The bridge housing 11 has a cavity 111. The bridge housing 11 and the support ring 12 are fixedly connected, and the cavity 111 and the annular hole 121 of the support ring 12 communicate to form an assembly space 101. A flange portion 13 is provided on the outer peripheral wall of the bridge housing 11, and the flange portion 13 is fixed relative to the bridge housing 11. The bearing assembly includes a bearing 51 and a second roller 52. The bearing 51 is disposed between the bearing assembly 30 and the support ring 12 so that the bearing assembly 30 can rotate relative to the support ring 12. The second roller 52 is disposed between the bearing assembly 30 and the flange portion 13 so that the bearing assembly 30 can rotate relative to the bridge housing 11.

[0060] Bearing 51 is a load-bearing bearing. The load-bearing assembly 30 is supported on the axle housing assembly 10 through bearing 51 and second roller 52. Mounting wheel 21 is rotatably connected to the load-bearing assembly 30 through rolling element 41. That is, the load-bearing force of mounting wheel 21 acts on the load-bearing assembly 30, so that the load-bearing force of mounting wheel 21 can be transmitted to the axle housing 11 through the load-bearing assembly 30, bearing 51 and support ring 12. At the same time, it can also be transmitted to the axle housing 11 through the load-bearing assembly 30 and second roller 52 to reduce the load-bearing force on the drive assembly.

[0061] Specifically, the axle housing 11 is used to support the cargo box of the dump truck.

[0062] Specifically, the outer circumferential surface of the support ring 12 must be a cylindrical surface, and the central axis of the outer circumferential surface of the support ring 12 coincides with the rotation axis of the mounting wheel 21. The central axis of the outer circumferential surface of the support ring 12 is the central axis of the support ring 12.

[0063] Specifically, the support ring 12 is a cylinder with a through-center.

[0064] Specifically, the bearing 51 is mounted on the outer peripheral wall of the support ring 12.

[0065] Specifically, bearing 51 is a cylindrical roller bearing or a double-row ball bearing to improve load-bearing capacity.

[0066] In this embodiment, the outer peripheral surface of the bridge housing 11 is a cylindrical surface; the flange portion 13 is an annular structure arranged around the central axis of the outer peripheral surface of the bridge housing 11; the central axis of the outer peripheral surface of the bridge housing 11 coincides with the rotation axis of the mounting wheel 21. Figure 2 The first outer peripheral surface 112 is the outer peripheral surface.

[0067] Along the extension direction of the central axis of the outer peripheral surface of the bridge housing 11, the bridge housing 11 has a first end and a second end that are disposed opposite to each other; the support ring 12 is connected to the second end of the bridge housing 11; the cavity 111 extends to the second end face of the bridge housing 11 so that the cavity 111 is connected to the annular hole 121.

[0068] The flange portion 13 has an annular first contact surface 131, which is disposed around the central axis of the outer peripheral surface of the bridge housing 11. From the first end to the second end of the bridge housing 11, the first contact surface 131 gradually moves away from the central axis of the outer peripheral surface of the bridge housing 11, so that the first contact surface 131 is an inclined surface that is inclined relative to the central axis of the outer peripheral surface of the bridge housing 11. The bearing assembly 30 has a second contact surface 31. Along the distribution direction of the first end and the second end of the bridge housing 11, and from the second end to the first end of the bridge housing 11, the first contact surface 131 is offset by a first distance to coincide with the second contact surface 31, that is, the tapers of the first contact surface 131 and the second contact surface 31 are equal. A second roller 52 is disposed between the first contact surface 131 and the second contact surface 31.

[0069] Specifically, the bridge housing 11 is a cylindrical structure, and the axial direction of the bridge housing 11 is the same as the distribution direction of the first end and the second end of the bridge housing 11.

[0070] In this embodiment, a connecting portion 14 is provided on the axle housing 11, and the support ring 12 is fixedly connected to the connecting portion 14; the wheel-side reduction device also includes a mounting bracket 71 fixedly connected to the support ring 12; along the axial direction of the bearing 51, the connecting portion 14 and the mounting bracket 71 are respectively located on both sides of the support ring 12; the axial direction of the bearing 51 is the same as the axial direction of the support ring 12. In a direction perpendicular to the axial direction of the bearing 51, a portion of the connecting portion 14 is located on the side of the outer peripheral surface of the support ring 12 away from the central axis of the support ring 12, and a portion of the mounting bracket 71 is located on the side of the outer peripheral surface of the support ring 12 away from the central axis of the support ring 12, so that both the connecting portion 14 and the mounting bracket 71 can contact the bearing 51, thereby enabling the connecting portion 14 and the mounting bracket 71 to act as a locking mechanism on the bearing 51 in the axial direction, thus achieving the positioning of the bearing 51 in the axial direction.

[0071] In this embodiment, a connecting portion 14 is provided at the second end of the bridge housing 11; by passing a fastener 15 through the connecting portion 14 and the support ring 12, the connecting portion 14 and the support ring 12 are fixedly connected, thereby fixing the bridge housing 11 to the support ring 12 through the connecting portion 14. Optionally, the fastener 15 is a bolt, and the fastener 15 is threadedly connected to the support ring 12.

[0072] Specifically, along the distribution direction of the first and second ends of the bridge housing 11, the side of the connecting portion 14 away from the first end of the bridge housing 11 is flush with the second end face of the bridge housing 11.

[0073] Specifically, along the distribution direction of the first end and the second end of the bridge housing 11, the side of the connecting portion 14 away from the first end of the bridge housing 11 is the first side surface; along the axial direction of the support ring 12, the support ring 12 has a first end and a second end that are disposed opposite to each other; the first end of the support ring 12 is fixedly connected to the connecting portion 14, and the first end face of the support ring 12 is in contact with the first side surface of the connecting portion 14.

[0074] Specifically, the connecting part 14 is an annular structure arranged around the central axis of the outer peripheral surface of the bridge housing 11; along the direction perpendicular to the axial direction of the bridge housing 11, the outer peripheral surface of the support ring 12 is located on the side of the outer peripheral surface of the connecting part 14 that is closer to the central axis of the outer peripheral surface of the bridge housing 11, that is, the outer diameter of the support ring 12 is smaller than the outer diameter of the connecting part 14, so that the connecting part 14 can play a blocking effect on the bearing 51 in the axial direction of the bridge housing 11.

[0075] Specifically, there are multiple fasteners 15, which are distributed at intervals along the circumferential direction of the support ring 12.

[0076] Specifically, the bridge shell 11, the connecting part 14, and the flange part 13 are integrally formed structures.

[0077] Optionally, the connecting part 14 is a flange.

[0078] Specifically, both the first contact surface 131 and the second contact surface 31 are conical surfaces.

[0079] Specifically, the connecting portion 14 and the flange portion 13 are spaced apart along the axial direction of the bridge housing 11; the distance between the connecting portion 14 and the flange portion 13 in the axial direction of the bridge housing 11 is greater than the axial length of the fastener 15, so that the fastener 15 can be inserted from between the connecting portion 14 and the flange portion 13 onto the connecting portion 14.

[0080] In this embodiment, the bearing assembly 30 has an annular third contact surface 32 arranged around the rotation axis of the mounting wheel 21; along the axial direction of the mounting wheel 21, i.e., from the first end to the second end of the bridge housing 11, the third contact surface 32 gradually moves away from the rotation axis of the mounting wheel 21. The anti-slip bracket 22 has a fourth contact surface 221; along the axial direction of the mounting wheel 21 and from the second end to the first end of the bridge housing 11, the third contact surface 32 is offset by a second distance to coincide with the fourth contact surface 221, i.e., the tapers of the third contact surface 32 and the fourth contact surface 221 are equal; a first roller 42 is disposed between the third contact surface 32 and the fourth contact surface 221.

[0081] Specifically, both the third contact surface 32 and the fourth contact surface 221 are conical surfaces.

[0082] Through the cooperation of the first contact surface 131 and the second contact surface 31, and the cooperation of the third contact surface 32 and the fourth contact surface 221, the flange portion 13 can block the load-bearing assembly 30 and the anti-detachment bracket 22 from moving from the first end to the second end of the bridge housing 11, thereby blocking the mounting wheel 21 from moving from the first end to the second end of the bridge housing 11, thus preventing the mounting wheel 21 from moving axially; that is, the flange portion 13 is a retaining ring.

[0083] In this embodiment, the drive assembly includes a drive motor 61, a first bevel gear 62, a second bevel gear 63, and a third bevel gear 64. The drive motor 61 is fixedly connected to the first bevel gear 62, and the central axis of the output shaft of the drive motor 61 coincides with the central axis of the first bevel gear 62, so the drive motor 61 drives the first bevel gear 62 to rotate synchronously. The first bevel gear 62 is a driving bevel gear. The second bevel gear 63 meshes with the first bevel gear 62, and the central axis of the second bevel gear 63 is perpendicular to the central axis of the first bevel gear 62, so the first bevel gear 62 drives the second bevel gear 63 to rotate. The third bevel gear 64 is fixedly connected to the second bevel gear 63, and the central axis of the third bevel gear 64 coincides with the central axis of the second bevel gear 63, so the second bevel gear 63 drives the third bevel gear 64 to rotate synchronously. The bearing assembly 30 includes a first transmission bevel gear 33 and a mounting wheel assembly. 20 includes a second transmission bevel gear 23; both the first transmission bevel gear 33 and the second transmission bevel gear 23 mesh with the third bevel gear 64 for transmission. The first transmission bevel gear 33 and the second transmission bevel gear 23 are located on opposite sides of the third bevel gear 64, so that the third bevel gear 64 simultaneously drives the first transmission bevel gear 33 and the second transmission bevel gear 23 to rotate in opposite directions. The first transmission bevel gear 33 drives the bearing assembly 30 to rotate, and the second transmission bevel gear 23 drives the mounting wheel assembly 20 to rotate. The central axis of the first transmission bevel gear 33 and the central axis of the second transmission bevel gear 23 coincide. The central axis of the first transmission bevel gear 33 and the central axis of the second transmission bevel gear 23 are both perpendicular to the central axis of the third bevel gear 64. The central axis of the first transmission bevel gear 33 and the central axis of the second transmission bevel gear 23 coincide with the central axis of the first bevel gear 62. Specifically, the drive motor 61 drives the bearing assembly 30 to rotate via the first bevel gear 62, the second bevel gear 63, the third bevel gear 64, and the first transmission bevel gear 33. The drive motor 61 also drives the mounting wheel assembly 20 to rotate via the first bevel gear 62, the second bevel gear 63, the third bevel gear 64, and the second transmission bevel gear 23. Both the first transmission bevel gear 33 and the second transmission bevel gear 23 are second transmission bevel gears 23.

[0084] The diameter of the outer circumference of the second transmission bevel gear 23 is larger than the diameter of the outer circumference of the first bevel gear 62. That is, due to the power transmission of the second bevel gear 63 and the third bevel gear 64, the diameter of the second transmission bevel gear 23 is larger than the diameter of the first bevel gear 62. This allows the rotational speed to decrease during the transmission from the drive motor 61 to the mounting wheel 21, thus achieving deceleration. This increases the driving force on the mounting wheel 21, thereby increasing the driving force on the dump truck.

[0085] Specifically, the central axis of the first bevel gear 62 coincides with the central axis of the outer circumferential surface of the bridge housing 11, that is, the central axis of the first bevel gear 62 coincides with the rotation axis of the mounting wheel 21.

[0086] Specifically, the diameter of the outer circumferential surface of the first transmission bevel gear 33 is greater than the diameter of the outer circumferential surface of the first bevel gear 62.

[0087] Specifically, the diameter of the outer circumferential surface of the second bevel gear 63 is larger than the diameter of the outer circumferential surface of the first bevel gear 62, and the diameter of the outer circumferential surface of the second bevel gear 63 is larger than the diameter of the outer circumferential surface of the third bevel gear 64, so that when the rotational speed of the first bevel gear 62 is transmitted to the second transmission bevel gear 23 through the second bevel gear 63 and the third bevel gear 64, there can be a greater deceleration effect.

[0088] Specifically, the wheel-side reduction gear also includes a mounting bracket 71 disposed in the mounting space 201, the mounting bracket 71 being fixedly connected to the axle housing assembly 10; the mounting bracket 71 has a mounting hole 711; the drive assembly also includes a connecting shaft 65, the connecting shaft 65 being fixedly connected to the second bevel gear 63 and the third bevel gear 64, so that the second bevel gear 63 is fixedly connected to the third bevel gear 64 through the connecting shaft 65; the central axis of the connecting shaft 65 coincides with the central axis of the second bevel gear 63, and the central axis of the connecting shaft 65 coincides with the central axis of the third bevel gear 64; the connecting shaft 65 is rotatably inserted into the mounting hole 711 about its central axis.

[0089] Specifically, the second bevel gear 63 has a first fixing hole 631, and the connecting shaft 65 is fixedly inserted into the first fixing hole 631. The third bevel gear 64 has a second fixing hole 641, and the connecting shaft 65 is fixedly inserted into the second fixing hole 641. Optionally, the connecting shaft 65 and the second bevel gear 63 are integrally formed.

[0090] Specifically, an external spline 651 is provided on the connecting shaft 65, and an internal spline 642 is provided on the wall of the second fixing hole 641. The external spline 651 and the internal spline 642 cooperate to fix the connecting shaft 65 and the third bevel gear 64 relative to each other.

[0091] Specifically, along the axial direction of the connecting shaft 65, the second bevel gear 63 and the third bevel gear 64 are located on both sides of the mounting bracket 71.

[0092] Specifically, along the axial direction of the connecting shaft 65, the mounting hole 711 penetrates the mounting bracket 71; along the axial direction of the connecting shaft 65, the mounting hole 711 has a first end and a second end that are arranged opposite to each other; a tapered needle roller bearing 72 is provided between the first end wall of the mounting hole 711 and the connecting shaft 65, and a tapered needle roller bearing 72 is also provided between the second end wall of the mounting hole 711 and the connecting shaft 65. Both the first end wall and the second end wall of the mounting hole 711 are made into tapered surfaces, and the tapered needle roller bearing 72 rolls on the tapered surfaces.

[0093] Specifically, the drive assembly also includes a clamping seat 73, which is disposed between the tapered needle roller bearing 72 and the connecting shaft 65 at the first end of the mounting hole 711. The clamping seat 73 is used to abut against the tapered needle roller bearing 72. The clamping seat 73 has a third fixing hole 731, in which the connecting shaft 65 is fixedly inserted. The clamping seat 73 abuts against the third bevel gear 64. The surface of the clamping seat 73 facing the tapered needle roller bearing 72 is also a conical surface.

[0094] Specifically, the connecting shaft 65 passes through the second fixing hole 641, and the nut 74 is threaded onto the connecting shaft 65 and abuts against the third bevel gear 64, so as to further fix the connecting shaft 65 and the third bevel gear 64 through the nut 74, and press the third bevel gear 64 and the clamping seat 73 together.

[0095] In this embodiment, the wheel-side reduction device includes a transmission mechanism 70, which includes a second bevel gear 63, a connecting shaft 65, a third bevel gear 64, a mounting bracket 71, a tapered needle roller bearing 72, a clamping seat 73, and a nut 74. There are multiple transmission mechanisms 70. The second bevel gears 63 of each transmission mechanism 70 mesh with a first bevel gear 62, and are spaced apart circumferentially along the first bevel gear 62. The mounting brackets 71 of each transmission mechanism 70 are fixedly connected to the axle housing assembly 10. The third bevel gears 64 of each transmission mechanism 70 mesh with a first transmission bevel gear 33 and also mesh with a second transmission bevel gear 23. The third bevel gears 64 of each transmission mechanism 70 are spaced apart circumferentially along the first transmission bevel gear 33 and the second transmission bevel gear 23. The first transmission bevel gear 33 and the second transmission bevel gear 23 are located on opposite sides of each third bevel gear 64.

[0096] Specifically, the first transmission bevel gear 33 has a first central through hole 331; the first central through hole 331 extends through the first transmission bevel gear 33 along the axial direction of the first transmission bevel gear 33; the portion of the first central through hole 331 is used for mounting the transmission mechanism 70.

[0097] Specifically, the second transmission bevel gear 23 has a second central through hole 231; the second central through hole 231 extends through the second transmission bevel gear 23 along its axial direction; the second transmission bevel gear 23 is disposed within the mounting space 201 such that the mounting space 201 includes the second central through hole 231. The portion within the second central through hole 231 is used for mounting the transmission mechanism 70.

[0098] Specifically, the mounting brackets 71 of the multiple transmission mechanisms 70 are all fixedly connected to the support ring 12, and the mounting brackets 71 of the multiple transmission mechanisms 70 are distributed at intervals along the circumference of the support ring 12.

[0099] Specifically, the mounting brackets 71 of the multiple transmission mechanisms 70 are all fixedly connected to the second end of the support ring 12, and the mounting brackets 71 of the multiple transmission mechanisms 70 are all in contact with the second end face of the support ring 12.

[0100] Specifically, along the axial direction of the bearing 51, the bearing 51 has a first end and a second end that are disposed opposite to each other; the connecting part 14 contacts the first end face of the bearing 51, and the plurality of mounting brackets 71 all contact the second end face of the bearing 51, so that the connecting part 14 and the plurality of mounting brackets 71 respectively act as a locking mechanism for the two ends of the bearing 51, thereby fixing the bearing 51 in the axial direction to reduce or prevent the bearing 51 from moving in its axial direction. The axial direction of the bearing 51 is parallel to or the same as the axial direction of the support ring 12.

[0101] Specifically, in a direction perpendicular to the axial direction of the bearing 51, a portion of the mounting bracket 71 is located on the side of the outer peripheral wall of the support ring 12 away from the central axis of the support ring 12, so that the mounting bracket 71 can contact the second end face of the bearing 51.

[0102] Specifically, the locking element 16 is passed through the support ring 12 and the mounting bracket 71 to fix the support ring 12 and the mounting bracket 71 relative to each other. Optionally, the locking element 16 is a bolt, and the locking element 16 is threadedly connected to the mounting bracket 71; the axial direction of the locking element 16 is parallel to the axial direction of the support ring 12.

[0103] Furthermore, there are multiple locking elements 16, which are distributed at intervals along the circumference of the support ring 12. Optionally, at least two locking elements 16 are provided on each mounting bracket 71.

[0104] In this embodiment, in each transmission mechanism 70, the smaller diameter end of the third bevel gear 64 is positioned facing the second bevel gear 63; the second transmission bevel gear 23 abuts against the third bevel gears 64 of the plurality of transmission mechanisms 70, and the third bevel gears 64 of the plurality of transmission mechanisms 70 can prevent the second transmission bevel gear 23 from moving along the direction from the second end to the first end of the bridge housing 11, and cooperate with the anti-detachment bracket 22 to prevent the mounting wheel 21 from moving along the direction from the second end to the first end of the bridge housing 11, so as to position the mounting wheel 21 axially and prevent the mounting wheel 21 from moving axially.

[0105] In this embodiment, the mounting wheel assembly 20 further includes a connecting plate 24; along the axial direction of the mounting wheel 21, the mounting wheel 21 has a first end and a second end disposed opposite to each other; the orientation of the first end to the second end of the mounting wheel 21 is the same as the orientation of the first end to the second end of the bridge housing 11. The connecting plate 24 is fixedly connected to the second end of the mounting wheel 21, and the connecting plate 24 is disposed within the central hole formed by the mounting wheel 21; the anti-detachment bracket 22 is fixedly connected to the first end of the mounting wheel 21, and the anti-detachment bracket 22 is disposed within the central hole formed by the mounting wheel 21. The anti-detachment bracket 22, the mounting wheel 21, and the connecting plate 24 together form the mounting space 201.

[0106] Specifically, the anti-detachment bracket 22 and the mounting wheel 21 are fixedly connected by bolts.

[0107] Specifically, the second transmission bevel gear 23 is fixedly mounted on the connecting plate 24. Optionally, the second transmission bevel gear 23 and the connecting plate 24 are integrally formed.

[0108] Specifically, the anti-detachment bracket 22 is a ring-shaped structure arranged around the central axis of the mounting wheel 21.

[0109] Specifically, the anti-detachment bracket 22 has a clearance opening 222 communicating with the mounting space 201. A portion of the axle housing 11 is disposed within the mounting space 201, with its first end protruding through the clearance opening 222 so that the first end of the axle housing 11 is located outside the mounting wheel assembly 20. The outer peripheral wall of the axle housing 11 is clearance-fitted with the inner wall of the clearance opening 222 to prevent the axle housing 11 from interfering with the rotation of the mounting wheel assembly 20. The second end of the axle housing 11 is located within the mounting space 201, and the support ring 12 is also located within the mounting space 201.

[0110] Specifically, along the axial direction of the mounting wheel 21, the anti-detachment bracket 22 has a first end and a second end that are arranged opposite to each other; the second end of the anti-detachment bracket 22 is fixedly connected to the mounting wheel 21, and the middle hole formed by the first end of the anti-detachment bracket 22 is a clearance opening 222.

[0111] In this embodiment, the drive motor 61 is disposed in the housing cavity 111, the first bevel gear 62 is disposed in the housing cavity 111 and the annular hole 121; a part of the second bevel gear 63 is located in the annular hole 121, and another part of the second bevel gear 63 is located in the mounting space 201; the third bevel gear 64, the mounting bracket 71 and the connecting shaft 65 are all located in the mounting space 201; and the second transmission bevel gear 23 is located in the mounting space 201.

[0112] In this embodiment, along the axial direction of the mounting wheel 21, the bearing assembly 30 includes a first bearing portion 301, a second bearing portion 302, a third bearing portion 303, and a fourth bearing portion 304 connected in sequence.

[0113] Specifically, the load-bearing component 30 is a one-piece molded structure.

[0114] Specifically, the second support portion 302 is located on the side of the first support portion 301 away from the first end of the bridge housing 11.

[0115] Specifically, the first support portion 301, the second support portion 302, the third support portion 303 and the fourth support portion 304 are all annular structures arranged around the central axis of the mounting wheel 21.

[0116] Specifically, in a direction perpendicular to the axis of the mounting wheel 21, the fourth bearing portion 304 is located on the side of the second bearing portion 302 away from the axis of rotation of the mounting wheel 21.

[0117] In this embodiment, the first roller 42 is disposed between the first support portion 301 and the mounting wheel assembly 20 so that the first support portion 301 and the mounting wheel assembly 20 can rotate relative to each other, thereby allowing the first support portion 301 and the mounting wheel assembly 20 to rotate in opposite directions.

[0118] Specifically, the first roller 42 is disposed between the first support portion 301 and the anti-detachment frame 22. The first roller 42 rolls and is supported between the first support portion 301 and the anti-detachment frame 22 so that the first support portion 301 and the anti-detachment frame 22 can rotate relative to each other, thereby allowing the first support portion 301 and the anti-detachment frame 22 to rotate in opposite directions.

[0119] In this embodiment, the second roller 52 is disposed between the first support portion 301 and the bridge housing assembly 10 so that the first support portion 301 can rotate relative to the bridge housing assembly 10.

[0120] Specifically, the second roller 52 is disposed between the first bearing portion 301 and the flange portion 13 so that the first bearing portion 301 can rotate relative to the flange portion 13; and the second roller 52 provides a certain support for the first bearing portion 301.

[0121] Specifically, both the second contact surface 31 and the third contact surface 32 are disposed on the first support portion 301. Further, the first support portion 301 has a plate-like structure, and the two plate surfaces of the first support portion 301 are the second contact surface 31 and the third contact surface 32, respectively. Optionally, the second contact surface 31 and the third contact surface 32 have equal tapers, that is, in the direction from the second end to the first end of the bridge housing 11, the second contact surface 31 is offset by a third distance to coincide with the third contact surface 32.

[0122] In this embodiment, the bearing 51 is disposed between the second support portion 302 and the bridge housing assembly 10 so that the second support portion 302 can rotate relative to the bridge housing assembly 10.

[0123] Specifically, the bearing 51 is disposed between the second bearing portion 302 and the support ring 12 so that the second bearing portion 302 can rotate relative to the support ring 12.

[0124] Specifically, the second bearing part 302 is sleeved on the bearing 51; the inner wall surface of the second bearing part 302 is in contact with the outer peripheral wall of the bearing 51.

[0125] In this embodiment, the first transmission bevel gear 33 is fixedly connected to the third bearing part 303, and the first transmission bevel gear 33 is connected to the drive assembly for transmission.

[0126] In this embodiment, the rolling element 41 is disposed between the fourth bearing portion 304 and the mounting wheel assembly 20 so that the fourth bearing portion 304 and the mounting wheel assembly 20 can rotate relative to each other, thereby allowing the fourth bearing portion 304 and the mounting wheel assembly 20 to rotate in opposite directions.

[0127] Specifically, the rolling element 41 is disposed between the fourth bearing portion 304 and the mounting wheel 21, so that the fourth bearing portion 304 and the mounting wheel 21 can rotate relative to each other, and thus the fourth bearing portion 304 and the mounting wheel 21 can rotate in opposite directions. That is, the outer peripheral wall of each rolling element 411 is in contact with the fourth bearing portion 304.

[0128] In this embodiment, the support component 30 is an annular structure arranged around the central axis of the mounting wheel 21.

[0129] Specifically, the first support portion 301, the second support portion 302, the third support portion 303 and the fourth support portion 304 are all plate-shaped structures; the first support portion 301 and the second support portion 302 are arranged at an angle, the second support portion 302 and the third support portion 303 are arranged at an angle, and the third support portion 303 and the fourth support portion 304 are arranged at an angle.

[0130] Optionally, the included angle between the first support portion 301 and the second support portion 302 is an obtuse angle, the included angle between the second support portion 302 and the third support portion 303 is 90 degrees, and the included angle between the third support portion 303 and the fourth support portion 304 is 90 degrees.

[0131] Specifically, along the axial direction of the mounting wheel 21, the bearing assembly 30 has a first end and a second end disposed opposite to each other; the second end of the bearing assembly 30 is spaced apart from the inner wall of the mounting space 201 to avoid mutual interference between the bearing assembly 30 and the mounting wheel assembly 20 during rotation; the first end of the bearing assembly 30 has a clearance opening 34 communicating with the mounting space 201, and the bridge housing 11 passes through the clearance opening 34. The outer peripheral wall of the bridge housing 11 is clearance-fitted with the inner wall of the clearance opening 34 to avoid interference of the bridge housing 11 with the rotation of the bearing assembly 30.

[0132] Specifically, the central hole formed by the first end of the support component 30 is an avoidance opening 34.

[0133] Specifically, the end of the first support portion 301 that is away from the second support portion 302 is the first end of the support assembly 30, and the end of the fourth support portion 304 that is away from the third support portion 303 is the second end of the support assembly 30.

[0134] Specifically, along the axial direction of the mounting wheel 21, multiple third bevel gears 64 are disposed in the inner space of the fourth bearing portion 304.

[0135] In the specific implementation process, the bearing component 30 is sleeved onto the bridge housing 11 from the first end. The mounting wheel 21 is sleeved onto the fourth bearing part 304 along the direction from the second end to the first end of the bridge housing 11.

[0136] In this embodiment, along the axial direction of the first bevel gear 62, the end with the smaller diameter of its outer peripheral surface is positioned away from the drive motor 61. Along the axial direction of the second bevel gear 63, the end with the larger diameter of its outer peripheral surface is positioned away from the first bevel gear 62. Along the axial direction of the second bevel gear 63, the end with the smaller diameter of its outer peripheral surface is positioned towards the second bevel gear 63.

[0137] In this embodiment, along the axial direction of the first bevel gear 62, the first transmission bevel gear 33 and the second transmission bevel gear 23 are located on opposite sides of the third bevel gear 64, with the second transmission bevel gear 23 located on the side of the first transmission bevel gear 33 away from the first bevel gear 62. Along the axial direction of the first bevel gear 62 and from the first transmission bevel gear 33 to the second transmission bevel gear 23, the diameter of the outer circumferential surface of the first transmission bevel gear 33 gradually decreases, while the diameter of the outer circumferential surface of the second transmission bevel gear 23 gradually increases.

[0138] In this embodiment, two wheel-side reduction gears are provided, and the first ends of the axle housings 11 of the two wheel-side reduction gears are connected.

[0139] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0140] 1. In use, the drive motor 61 drives the mounting wheel 21 to rotate through the first bevel gear 62, the second bevel gear 63, the third bevel gear 64, and the second transmission bevel gear 23. The mounting wheel 21 is used for bearing load. When the mounting wheel 21 is bearing load, it is rotatably connected to the fourth bearing part 304 under the action of the roller 411. The fourth bearing part 304 is rotatably connected to the support ring 12 through the second bearing part 302. The bearing force of the mounting wheel 21 is applied to the fourth bearing part 304, and the bearing force of the fourth bearing part 304 is transmitted to the axle housing 11 through the second bearing part 302 and the bearing 51. The first bearing part 301 positions the bearing assembly 30 on the axle housing 11, thereby reducing the transmission of the bearing force of the mounting wheel 21 to the axle housing 11 through the bevel gear assembly, thereby reducing the wear of each bevel gear in the bevel gear assembly and improving the service life of each bevel gear. The bevel gear assembly includes the first bevel gear 62, the second bevel gear 63, the third bevel gear 64, and the second transmission bevel gear 23.

[0141] 2. The drive motor 61 drives the second bevel gear 63 through the first bevel gear 62. The second bevel gear 63 and the third bevel gear 64 rotate coaxially, thereby causing the third bevel gear 64 to drive the second transmission bevel gear 23, which in turn enables the mounting wheel 21 to rotate under the drive of the second transmission bevel gear 23. Moreover, in a direction perpendicular to the axial direction of the first bevel gear 62, the third bevel gear 64 is located on the side of the second bevel gear 63 away from the central axis of the first bevel gear 62, thereby reducing the speed of the drive of the first bevel gear 62, the second bevel gear 63 and the third bevel gear 64 on the second transmission bevel gear 23 and increasing the driving force on the mounting wheel 21.

[0142] 3. The diameter of the outer circumference of the second bevel gear 63 is greater than the diameter of the outer circumference of the first bevel gear 62, so that the second bevel gear 63 has the function of deceleration and torque increase when it comes to the first bevel gear 62; at the same time, the diameter of the second bevel gear 63 is greater than the diameter of the third bevel gear 64, so that there can be a larger transmission ratio between the second bevel gear 63 and the second transmission bevel gear 23.

[0143] 4. A connecting shaft 65 is coaxially mounted on the second bevel gear 63. During installation, the connecting shaft 65 is inserted into the mounting hole 711, and then the clamping seat 73 is fitted on. Tapered needle roller bearings 72 are provided between the clamping seat 73 and the mounting bracket 71, and between the mounting bracket 71 and the connecting shaft 65. When the nut 74 is installed on the connecting shaft 65, the clamping seat 73 adjusts the position of the connecting shaft 65 so that the connecting shaft 65 is stably connected to the mounting bracket 71 in its radial direction.

[0144] 5. The outer diameter of the support ring 12 is smaller than the outer diameter of the flange. During installation, the bearing 51 is first placed on the support ring 12 so that the mounting bracket 71 abuts against one end face of the bearing 51. Then the support ring 12 is fixed on the flange. At this time, the other end face of the bearing 51 can abut against the flange, thereby achieving axial positioning of the bearing 51.

[0145] 6. The locking element 16 is used to connect the support ring 12 and the mounting bracket 71, so that the second bevel gear 63 and the third bevel gear 64 can be installed on the mounting bracket 71 first, thereby facilitating the installation of the transmission mechanism 70; at the same time, by setting the fastener 15 on the flange, the bearing 51 on the support ring 12 can be easily installed between the flange and the mounting bracket 71.

[0146] 7. The bearing assembly 30 includes a first transmission bevel gear 33. When the first transmission bevel gear 33 and the second transmission bevel gear 23 are symmetrically arranged on both sides of the third bevel gear 64, the rotation of the third bevel gear 64 can drive the first transmission bevel gear 33 to rotate in the opposite direction relative to the second transmission bevel gear 23. This can increase the revolution period of the roller 411 installed between the bearing assembly 30 and the mounting wheel 21, reduce or avoid damage to the roller 411 due to reaching its yield strength, and improve the service life of the roller 411.

[0147] 8. A first roller 42 is provided between the fourth contact surface 221 on the anti-detachment bracket 22 and the third contact surface 32 of the first bearing part 301, and a second roller 52 is provided between the second contact surface 31 of the first bearing part 301 and the first contact surface 131 of the flange part 13, so that the anti-detachment bracket 22 can position the mounting wheel 21 along the direction from the first end to the second end of the bridge housing 11, reducing the movement of the mounting wheel 21 on the bridge housing 11.

[0148] 9. The smaller diameter end of the third bevel gear 64 is positioned towards the second bevel gear 63, so that the outer side of the second transmission bevel gear 23 meshes with the third bevel gear 64, which facilitates the machining of the second transmission bevel gear 23 and reduces the transmission of load from the second transmission bevel gear 23 to the third bevel gear 64.

[0149] 10. Place the roller 411 into the mounting groove 211 to reduce the axial movement of the roller 411 and improve the stability of the roller 411; at the same time, the roller 411 can transmit a larger load and reduce the damage to the roller 411.

[0150] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0151] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0152] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wheel-side speed reduction device, characterized in that, include: A bridge housing assembly (10) having an assembly space (101); Mounting wheel assembly (20) with mounting space (201); A support assembly (30) is disposed within the mounting space (201), with a portion of the support assembly (30) located between the bridge housing assembly (10) and the mounting wheel assembly (20); A drive assembly, a portion of which is installed in the assembly space (101) and another portion of which is installed in the mounting space (201); the drive assembly is drivenly connected to the mounting wheel assembly (20) and the load-bearing assembly (30) to simultaneously drive the mounting wheel assembly (20) and the load-bearing assembly (30) to rotate in opposite directions; A rolling assembly disposed between the mounting wheel assembly (20) and the load-bearing assembly (30) to allow relative rotation between the mounting wheel assembly (20) and the load-bearing assembly (30); A bearing assembly disposed between the load-bearing assembly (30) and the bridge housing assembly (10) to allow the load-bearing assembly (30) to rotate relative to the bridge housing assembly (10); The driving component includes: Drive motor (61); The first bevel gear (62) is fixedly connected to the drive motor (61), and the central axis of the output shaft of the drive motor (61) coincides with the central axis of the first bevel gear (62). The second bevel gear (63) meshes with the first bevel gear (62) for transmission, and the central axis of the second bevel gear (63) is perpendicular to the central axis of the first bevel gear (62). The third bevel gear (64) is fixedly connected to the second bevel gear (63), and the central axis of the third bevel gear (64) coincides with the central axis of the second bevel gear (63).

2. The wheel-side speed reduction device according to claim 1, characterized in that, The mounting wheel assembly (20) includes a mounting wheel (21) and an anti-detachment bracket (22) detachably connected to the mounting wheel (21); when the mounting wheel (21) and the anti-detachment bracket (22) are connected, the mounting wheel (21) and the anti-detachment bracket (22) are relatively fixed; the drive assembly is drivenly connected to the mounting wheel (21); the rolling assembly includes a rolling component (41) and a first roller (42), the rolling component (41) is disposed between the mounting wheel (21) and the bearing assembly (30), and the first roller (42) is disposed between the anti-detachment bracket (22) and the bearing assembly (30).

3. The wheel-side speed reduction device according to claim 2, characterized in that, The mounting wheel (21) has a ring-shaped mounting groove (211) arranged around the rotation axis of the mounting wheel (21); The rolling element component (41) includes a support frame (412) and a plurality of rolling elements (411), which are spaced apart circumferentially along the mounting groove (211); each rolling element (411) is rotatably mounted on the support frame (412), and the rotation axis of each rolling element (411) is parallel to the rotation axis of the mounting wheel (21); at least a portion of each rolling element (411) is located within the mounting groove (211) along the radial direction of each rolling element (411).

4. The wheel-side speed reduction device according to claim 1, characterized in that, The bridge housing assembly (10) includes a bridge housing (11) and a support ring (12). The bridge housing (11) has a cavity (111). The bridge housing (11) and the support ring (12) are fixedly connected. The cavity (111) and the annular hole (121) of the support ring (12) communicate to form the assembly space (101). A flange (13) is provided on the outer peripheral wall of the bridge housing (11). The bearing assembly includes a bearing (51) and a second roller (52). The bearing (51) is disposed between the bearing assembly (30) and the support ring (12) so that the bearing assembly (30) can rotate relative to the support ring (12). The second roller (52) is disposed between the bearing assembly (30) and the flange (13) so that the bearing assembly (30) can rotate relative to the bridge housing (11).

5. The wheel-side speed reduction device according to claim 4, characterized in that, The outer peripheral surface of the bridge housing (11) is a cylindrical surface; the flange (13) is an annular structure arranged around the central axis of the outer peripheral surface of the bridge housing (11); the central axis of the outer peripheral surface of the bridge housing (11) coincides with the rotation axis of the mounting wheel assembly (20). Along the extension direction of the central axis of the outer peripheral surface of the bridge shell (11), the bridge shell (11) has a first end and a second end disposed opposite to each other; the support ring (12) is connected to the second end of the bridge shell (11); The flange (13) has an annular first contact surface (131); from the first end to the second end of the bridge housing (11), the first contact surface (131) gradually moves away from the central axis of the outer peripheral surface of the bridge housing (11); The bearing component (30) has a second contact surface (31); from the second end to the first end of the bridge housing (11), the first contact surface (131) is offset by a first distance to coincide with the second contact surface (31); the second roller (52) is disposed between the first contact surface (131) and the second contact surface (31).

6. The wheel-side speed reduction device according to claim 2, characterized in that, The bearing assembly (30) has an annular third contact surface (32) arranged around the rotation axis of the mounting wheel (21); along the axial direction of the mounting wheel (21), the third contact surface (32) gradually moves away from the rotation axis of the mounting wheel (21); The anti-detachment bracket (22) has a fourth contact surface (221); along the axial direction of the mounting wheel (21), the third contact surface (32) is offset by a second distance to coincide with the fourth contact surface (221); the first roller (42) is disposed between the third contact surface (32) and the fourth contact surface (221).

7. The wheel-side speed reduction device according to claim 1, characterized in that, The load-bearing assembly (30) includes a first transmission bevel gear (33), and the mounting wheel assembly (20) includes a second transmission bevel gear (23). The third bevel gear (64) meshes with the first transmission bevel gear (33) and also meshes with the second transmission bevel gear (23) to drive the first transmission bevel gear (33) and the second transmission bevel gear (23) to rotate in opposite directions. The central axis of the first transmission bevel gear (33) and the central axis of the second transmission bevel gear (23) both coincide with the central axis of the first bevel gear (62). The diameter of the outer circumferential surface of the second transmission bevel gear (23) is greater than the diameter of the outer circumferential surface of the first bevel gear (62).

8. The wheel-side speed reduction device according to claim 7, characterized in that, The wheel-side reduction gear also includes a mounting bracket (71) disposed in the mounting space (201), the mounting bracket (71) being fixedly connected to the axle housing assembly (10); the mounting bracket (71) has mounting holes (711). The drive assembly further includes a connecting shaft (65), which is fixedly connected to the second bevel gear (63) and the third bevel gear (64); the central axis of the connecting shaft (65) coincides with the central axis of the second bevel gear (63); the connecting shaft (65) is rotatably inserted into the mounting hole (711).

9. The wheel-side speed reduction device according to claim 1, characterized in that, The bearing assembly (30) has a ring structure; along the axial direction of the mounting wheel assembly (20), the bearing assembly (30) includes a first bearing part (301), a second bearing part (302), a third bearing part (303) and a fourth bearing part (304) connected in sequence. The rolling assembly includes a first roller (42) disposed between the first bearing portion (301) and the mounting wheel assembly (20); or, The bearing assembly includes a second roller (52) disposed between the first bearing portion (301) and the bridge housing assembly (10); or, The bearing assembly includes a bearing (51) disposed between the second load-bearing portion (302) and the bridge housing assembly (10); or, The load-bearing component (30) further includes a first transmission bevel gear (33), which is fixedly connected to the third load-bearing part (303) and is also drively connected to the drive component; or, The rolling assembly includes a rolling component (41) disposed between the fourth bearing portion (304) and the mounting wheel assembly (20).

10. The wheel-side speed reduction device according to any one of claims 7 to 8, characterized in that, The third bevel gear (64) is located on the side of the second bevel gear (63) away from the central axis of the first bevel gear (62) in a direction perpendicular to the axial direction of the first bevel gear (62); or, The diameter of the outer circumferential surface of the first transmission bevel gear (33) is larger than the diameter of the outer circumferential surface of the first bevel gear (62); or, The diameter of the outer circumferential surface of the second bevel gear (63) is larger than the diameter of the outer circumferential surface of the first bevel gear (62); or, The diameter of the outer circumferential surface of the second bevel gear (63) is larger than the diameter of the outer circumferential surface of the third bevel gear (64); or, The smaller diameter end of the outer circumferential surface of the third bevel gear (64) is positioned towards the second bevel gear (63); or, The smaller diameter end of the outer circumferential surface of the first bevel gear (62) is positioned away from the drive motor (61); or, The larger diameter end of the outer circumferential surface of the second bevel gear (63) is located away from the first bevel gear (62).

11. The wheel-side speed reduction device according to any one of claims 7 to 8, characterized in that, Along the axial direction of the first bevel gear (62), the first transmission bevel gear (33) and the second transmission bevel gear (23) are located on opposite sides of the third bevel gear (64), and the second transmission bevel gear (23) is located on the side of the first transmission bevel gear (33) away from the first bevel gear (62). Along the axial direction of the first bevel gear (62) and from the first transmission bevel gear (33) to the second transmission bevel gear (23), the diameter of the outer circumferential surface of the first transmission bevel gear (33) gradually decreases, and the diameter of the outer circumferential surface of the second transmission bevel gear (23) gradually increases.

12. The wheel-side speed reduction device according to claim 4 or 5, characterized in that, The bridge housing (11) is provided with a connecting part (14), and the support ring (12) is fixedly connected to the connecting part (14); the wheel-side deceleration device also includes a mounting bracket (71) fixedly connected to the support ring (12); along the axial direction of the bearing (51), the connecting part (14) and the mounting bracket (71) are respectively located on both sides of the support ring (12); Along a direction perpendicular to the axial direction of the bearing (51), a portion of the connecting part (14) is located on the side of the outer peripheral surface of the support ring (12) away from the central axis of the support ring (12), and a portion of the mounting bracket (71) is located on the side of the outer peripheral surface of the support ring (12) away from the central axis of the support ring (12), so that both the connecting part (14) and the mounting bracket (71) are in contact with the bearing (51), thereby axially positioning the bearing (51).

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