Two-stage hub reduction gear assembly and crane

Abstract

The utility model relates to the technical field of speed reducers, in particular to a two-stage hub speed reducer assembly and a crane, which comprises a hub, a first-stage planet carrier, a second-stage planet transmission component and a hub end cover, wherein the second-stage planetary transmission assembly comprises a second-stage sun gear and a second-stage planet carrier, the first-stage planet carrier is connected with the second-stage sun gear, and the hub is connected with the second-stage planet carrier; the wheel edge end cover is connected with the secondary planet carrier; a plurality of first through holes are formed in the secondary planet carrier, a plurality of second through holes are formed in the hub, and the first through holes and the second through holes are coaxially arranged; a plurality of radiating ribs are arranged on the outer surface of the wheel edge end cover; according to the double-stage hub reduction structure, the through holes are formed in the hub and the second-stage planet carrier, the heat dissipation capacity is improved, the heat dissipation performance of the double-stage hub reduction gear is improved, in addition, the hub end cover is independently designed, disassembly and assembly can be facilitated, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to a two-stage wheel-side speed reducer assembly and a crane. Background Technology

[0002] In infrastructure construction such as wind power, wheeled crane chassis play a crucial role, requiring two important functions: heavy-duty relocation and high-speed travel. Existing wheeled crane chassis use drive axles with low speed ratios and employ single-stage reduction technology at the wheel ends, resulting in insufficient output driving force. This fails to provide the robust driving force needed for heavy-duty relocation of ultra-large tonnage crane chassis, often necessitating the use of a tractor, leading to low work efficiency and high costs.

[0003] However, while two-stage wheel-side reducers exist in other fields, they are all suitable for low-speed driving and involve significant deceleration. Furthermore, they lack specialized cooling structures, resulting in weak heat dissipation and a risk of excessive temperature rise during vehicle operation, potentially leading to oil leaks or burning. The existing two-stage wheel-side reducer in Solution 1 uses an integrated design for its secondary planetary carrier. When the wheel-side reducer malfunctions, the tire must be removed, making maintenance inconvenient and reducing its maintainability.

[0004] Therefore, a two-stage wheel-side reducer and crane are needed to solve the above problems, while also considering the heat dissipation problem of the wheel-side reducer when the wheel crane chassis is traveling at high speed. Utility Model Content

[0005] The technical objective of this invention is to design a two-stage wheel-side reducer assembly and a crane to solve the problems of weak heat dissipation, poor maintainability, and insufficient driving force of current reducers.

[0006] To achieve the above-mentioned technical objectives, this utility model provides the following technical solution:

[0007] In a first aspect, a two-stage wheel-side reducer assembly includes a wheel hub, a primary planetary carrier, a secondary planetary transmission assembly, and a wheel-side end cap; wherein the secondary planetary transmission assembly includes a secondary sun gear and a secondary planetary carrier, the primary planetary carrier is connected to the secondary sun gear, the wheel hub is connected to the secondary planetary carrier, and the wheel-side end cap is connected to the secondary planetary carrier;

[0008] The edge of the secondary planetary carrier is provided with a plurality of first through holes, and the edge of the hub is provided with a plurality of second through holes, wherein the first through holes and the second through holes are arranged coaxially.

[0009] The outer surface of the wheel end cap is provided with several heat dissipation ribs.

[0010] Furthermore, the number of the first through holes and the second through holes are equal, and they are evenly distributed along the circumference of the hub.

[0011] Furthermore, the heat dissipation fins are radially arranged protruding structures.

[0012] Furthermore, the wheel end cap is detachably connected to the secondary planetary carrier via bolts.

[0013] Furthermore, the secondary planetary transmission assembly also includes a secondary planetary gear; the secondary sun gear is connected to the primary planetary carrier via a spline connection, the secondary planetary gear is rotatably mounted on the secondary planetary carrier, and the secondary planetary gear is meshed with the secondary sun gear.

[0014] Furthermore, the two-stage wheel-side reducer assembly also includes a wheel-side half-shaft and a steering knuckle; the wheel-side half-shaft is sleeved inside the steering knuckle, and the wheel-side half-shaft and the steering knuckle are arranged coaxially; a lubrication hole is provided at the lower end of the steering knuckle.

[0015] Furthermore, the two-stage wheel-side reducer assembly also includes a gear ring assembly, which is sleeved on one end of the steering knuckle. The gear ring assembly includes a first gear ring, a gear ring support, and a pressure plate. The gear ring support is connected to the steering knuckle via a spline engagement, and the gear ring support is connected to the first gear ring via a toothed spline engagement. A pressure plate is provided on the gear ring support.

[0016] In a second aspect, a crane includes the two-stage wheel-side reducer assembly described in any of the first aspects.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0018] This application achieves a high speed ratio through a two-stage wheel-side reduction structure, increasing vehicle driving force and improving work efficiency. Through holes are provided on both the wheel hub and the secondary planetary carrier, with a through-hole design to increase heat dissipation capacity and dissipate the heat generated by the high temperature of the brake caliper. The wheel-side end cap is provided with several rib structures to quickly dissipate the heat generated by the temperature rise of the lubricating oil, increasing heat dissipation capacity and improving the heat dissipation performance of the two-stage wheel-side reducer. In addition, the wheel-side end cap is designed separately to facilitate disassembly and assembly, improving maintenance efficiency. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0021] Figure 1This is a main structural diagram of the two-stage wheel-side reducer provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the heat dissipation structure of the two-stage wheel-side reducer provided by this utility model.

[0023] In the picture:

[0024] 1. Wheel-side half-shaft; 2. Steering knuckle; 201. Lubrication hole; 3. Bearing; 4. Gear ring assembly; 401. First gear ring ; 402, Gear ring support; 403, Pressure plate; 404, First bolt; 5, Locking nut; 6, First-stage planetary assembly; 601, First-stage sun gear; 602, First-stage planetary gear; 603, First-stage planetary carrier; 7, Second-stage planetary assembly; 701, Second-stage sun gear; 702, Second-stage planetary gear; 703, Second-stage planetary carrier; 70301, First through hole; 8, Hub; 801, Second through hole; 9, Second bolt; 10, Brake; 11, Wheel end cap; 1101, Heat dissipation fin. Detailed Implementation

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example 1:

[0026] like Figure 1 As shown, a two-stage wheel-side reducer assembly includes a wheel-side half-shaft 1, a steering knuckle 2, a bearing 3, a gear ring assembly 4, a lock nut 5, a first-stage planetary assembly 6, a second-stage planetary assembly 7, a wheel hub 8, a second bolt 9, a brake 10, and a wheel-side end cap 11.

[0027] The wheel-side half-shaft 1 is sleeved inside the steering knuckle 2, and the two are arranged coaxially. A lubrication hole 201 is provided below the shaft head of the steering knuckle 2 for quick lubrication of the bearing 3.

[0028] The gear ring assembly 4 is sleeved on one end of the steering knuckle 2; it includes a first gear ring 401, a gear ring support 402, several pressure plates 403, and a first bolt 404. The gear ring support 402 is connected to the steering knuckle 2 via a spline engagement, and the gear ring support 402 is connected to the first gear ring 401 via a toothed spline engagement. Several pressure plates 403 and the first bolt 404 are provided on the gear ring support 402 for limiting the position of the gear ring support 402. A locking nut 5 is sleeved on the end of the steering knuckle 2 to limit the position of the gear ring support 402.

[0029] The primary planetary transmission assembly is sleeved on one end of the wheel-side half-shaft 1. It includes a primary sun gear 601, a primary planet gear 602, and a primary planet carrier 603. The primary sun gear 601 is connected to the wheel-side half-shaft 1 via a spline connection. The primary planet gear 602 is rotatably mounted on the primary planet carrier 603 and meshes with the primary sun gear 601 and the first gear ring 401.

[0030] The secondary planetary transmission assembly is housed within the primary planetary carrier 603. It includes a secondary sun gear 701, secondary planetary gears 702, and a secondary planetary carrier 703. The secondary sun gear 701 is connected to the primary planetary carrier 603 via a spline connection. The secondary planetary gear 702 is rotatably mounted on the secondary planetary carrier 703 and meshes with the secondary sun gear 701 and the first gear ring 401. The secondary planetary carrier 703 is fixedly connected to the hub 8 via a second bolt 9.

[0031] like Figure 2 As shown, the edge of the secondary planetary carrier 703 is provided with several first through holes 70301, and the edge of the hub 8 is provided with several second through holes 801. The number of first through holes 70301 and second through holes 801 are the same and they are arranged on the same axis to increase the dissipation of heat generated by the high temperature of the brake 10.

[0032] The wheel end cap 11 is located on the outermost side of the two-stage wheel end reducer assembly, and is fixedly connected to the second-stage planetary carrier 703 by bolts. The wheel end cap 11 is provided with several heat dissipation ribs 1101 to increase heat dissipation capacity; the heat dissipation ribs 1101 are radially arranged protruding structures.

[0033] The wheel end cap 11 and the secondary planetary carrier 703 are detachably connected by the first bolt 404. Example 2:

[0034] Based on Embodiment 1, this embodiment applies the two-stage wheel-side reducer assembly to a crane. Its operation is as follows: When the wheel-side half-shaft 1 rotates, it drives the first-stage sun gear 601 to rotate. The first-stage sun gear 601 meshes with and rotates with the first-stage planetary gear 602. The first-stage planetary gear 602 meshes with and rotates with the first gear ring 401. The first gear ring 401 is fixed, driving the first-stage planetary carrier 603 to rotate. The first-stage planetary carrier 603 and the second-stage sun gear 701 are connected by a spline anti-rotation connection, causing the second-stage sun gear 701 to rotate accordingly. Similarly, the second-stage sun gear 701 meshes with and rotates with the second-stage planetary gear 702. The second-stage planetary gear 702 meshes with and rotates with the first gear ring 401. The first gear ring 401 is fixed, driving the second-stage planetary carrier 703 to rotate accordingly. The second-stage planetary carrier 703, along with the wheel hub 8 and the tire, rotate together, enabling the vehicle to move.

[0035] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

[0036] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to the embodiments of the present disclosure, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present disclosure are within the scope of protection claimed by the present disclosure.

Claims

1. A two-stage wheel-side reducer assembly, characterized in that: It includes a hub (8), a primary planetary carrier (603), a secondary planetary transmission assembly, and a wheel end cap (11); wherein, the secondary planetary transmission assembly includes a secondary sun gear (701) and a secondary planetary carrier (703), the primary planetary carrier (603) is connected to the secondary sun gear (701), the hub (8) is connected to the secondary planetary carrier (703); and the wheel end cap (11) is connected to the secondary planetary carrier (703). The secondary planetary carrier (703) is provided with a plurality of first through holes (70301), and the hub (8) is provided with a plurality of second through holes (801). The first through holes (70301) and the second through holes (801) are arranged on the same axis. The outer surface of the wheel end cap (11) is provided with several heat dissipation ribs (1101).

2. The two-stage wheel-side reducer assembly according to claim 1, characterized in that: The number of the first through hole (70301) and the second through hole (801) are equal and they are evenly distributed along the circumference of the hub (8).

3. The two-stage wheel-side reducer assembly according to claim 1, characterized in that: The heat dissipation fins (1101) are radially arranged protruding structures.

4. The two-stage wheel-side reducer assembly according to claim 1, characterized in that: The wheel end cap (11) and the secondary planetary carrier (703) are detachably connected by bolts.

5. The two-stage wheel-side reducer assembly according to claim 1, characterized in that: The secondary planetary transmission assembly also includes a secondary planetary gear (702); the secondary sun gear (701) is connected to the primary planetary carrier (603) via a spline connection, the secondary planetary gear (702) is rotatably mounted on the secondary planetary carrier (703), and the secondary planetary gear (702) is meshed with the secondary sun gear (701).

6. The two-stage wheel-side reducer assembly according to claim 1, characterized in that: It also includes a wheel-side half-shaft (1) and a steering knuckle (2); the wheel-side half-shaft (1) is sleeved inside the steering knuckle (2), and the wheel-side half-shaft (1) and the steering knuckle (2) are arranged on the same axis; the lower end of the steering knuckle (2) is provided with a lubrication hole (201).

7. The two-stage wheel-side reducer assembly according to claim 6, characterized in that: It also includes a gear ring assembly (4), which is sleeved on one end of the steering knuckle (2). The gear ring assembly (4) includes a first gear ring (401), a gear ring support (402), and a pressure plate (403). The gear ring support (402) is connected to the steering knuckle (2) by a spline engagement, and the gear ring support (402) is connected to the first gear ring (401) by a toothed spline engagement. The pressure plate (403) is provided on the gear ring support (402).

8. A crane, characterized in that, Includes the two-stage wheel-side reducer assembly as described in any one of claims 1 to 7.

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