A hub bearing unit and outer race cage transmission structure

Abstract

A kind of transmission structure of hub bearing unit and outer ball cage.The main problem solved is that the current hub bearing unit and outer ball cage may cause deformation by spline transmission.It is characterized by further comprising an annular wall (31) provided on the housing, the annular wall is provided with a sink (311) in the axial direction, the circumferential inner wall of the sink is provided with a first transmission part (312), a convex ring (11) is provided on the circumferential outer wall of the inner ring, and the circumferential outer wall of the convex ring is provided with a second transmission part (111) for transmitting torque matched with the first transmission part.The utility model provides a kind of transmission structure of hub bearing unit and outer ball cage, two kinds of torque transmission modes are combined together, second transmission is increased on the original spline transmission, two kinds of cooperative torque transmission, not only make the efficiency of transmission higher, also greatly improve the spline life of outer ball cage and hub bearing unit, reduce the transmission vibration and abnormal sound and other problems caused by fretting wear.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a transmission structure between a wheel hub bearing unit and an outer ball cage. Background Technology

[0002] Currently, the wheel hub bearing unit and the outer ball cage are connected by a spline for transmission. Multiple key teeth are machined on the shaft and the hub bore to form an integral connecting part used to transmit torque and motion. During long-term start-stop and acceleration / deceleration processes, the spline is constantly subjected to impact forces. The spline stress concentration leads to deformation, which in turn causes problems such as abnormal transmission noise. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a transmission structure between a wheel hub bearing unit and an outer ball cage, mainly solving the problem that deformation may occur if the current wheel hub bearing unit and outer ball cage are driven purely by spline transmission.

[0004] The technical solution of this utility model is as follows: A transmission structure between a hub bearing unit and an outer ball cage, wherein the hub bearing unit includes an outer ring and an inner ring, the outer ball cage includes a housing, the housing has a splined shaft, the inner ring has a linkage hole, and a transmission key that mates with the splined shaft is provided in the linkage hole; the structure also includes... An annular wall is provided on the housing, and the annular wall has an axially provided groove. The inner circumferential wall of the groove is provided with a first transmission part. A convex ring is provided on the circumferential outer wall of the inner ring, and the circumferential outer wall of the convex ring is provided with a second transmission part for transmitting torque, which cooperates with the first transmission part.

[0005] The spline shaft is coaxially arranged with the annular wall.

[0006] The first transmission part is a transmission gear.

[0007] An oil seal is provided between the outer ring and the inner ring.

[0008] The annular wall is located on the outer side of the oil seal.

[0009] The oil seal includes a skeleton, on which a sealing lip is provided, and the sealing lip is in sealing engagement with the axial outer wall of the annular wall.

[0010] The convex ring is disposed within the sink groove.

[0011] The beneficial effects of this utility model are: This utility model provides a transmission structure for a wheel hub bearing unit and an outer ball cage, combining two torque transmission methods. By adding a second transmission to the original spline transmission, the two methods of synergistic torque transmission not only improve the transmission efficiency but also greatly extend the life of the outer ball cage and the spline of the wheel hub bearing unit, reducing transmission vibration and abnormal noise caused by fretting wear. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0013] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0014] Figure 3 This is a partial cross-sectional view of one embodiment of the present invention.

[0015] Figure 4 This is a cross-sectional schematic diagram of a hub bearing unit according to an embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings. A transmission structure for a hub bearing unit and an outer ball cage is provided. The hub bearing unit includes an outer ring 1 and an inner ring 2. The outer ball cage includes a housing 3, on which a splined shaft 30 is provided. The inner ring has a linkage hole 21, in which a transmission key cooperating with the splined shaft is provided. The structure also includes an annular wall 31 disposed on the housing. The annular wall has an axially formed groove 311. The inner circumferential wall of the groove has a first transmission part 312. A convex ring 11 is disposed on the outer circumferential wall of the inner ring. The outer circumferential wall of the convex ring has a second transmission part 111 cooperating with the first transmission part for transmitting torque. The first and second transmission parts can be connected by gear transmission or key transmission, etc., which distributes the transmission pressure of the splined shaft, greatly improves the lifespan of the outer ball cage and the spline of the hub bearing unit, and reduces transmission vibration and abnormal noise caused by fretting wear. In this embodiment, as shown in the figure, the spline shaft is coaxially arranged with the annular wall.

[0017] In this embodiment, as shown in the figure, the first transmission part is a transmission gear. The structure is relatively simple due to the gear transmission. The second transmission part is a gear that meshes with the first transmission part.

[0018] In this embodiment, as shown in the figure, an oil seal 4 is provided between the outer ring and the inner ring to prevent grease leakage between the outer ring and the inner ring.

[0019] In this embodiment, as shown in the figure, the annular wall is positioned on the outer side of the oil seal, serving to protect the oil seal.

[0020] In this embodiment, as shown in the figure, the oil seal includes a skeleton 41, on which a sealing lip 42 is provided. The sealing lip is in sealing engagement with the axial outer wall of the annular wall. The sealing lip is generally annular, and the first transmission part is disposed within this annulus to prevent foreign objects from entering the first transmission part and the second transmission part.

[0021] In this embodiment, as shown in the figure, the convex ring is disposed within the sink groove. The overall structure is more compact.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A transmission structure between a hub bearing unit and an outer ball cage, the hub bearing unit comprising an outer ring (1) and an inner ring (2), the outer ball cage comprising a housing (3), the housing having a splined shaft (30), the inner ring having a linkage hole (21), the linkage hole having a transmission key that mates with the splined shaft, characterized in that: Also includes An annular wall (31) is provided on the housing, and the annular wall is provided with a groove (311) in the axial direction. The inner wall of the groove is provided with a first transmission part (312). A convex ring (11) is provided on the circumferential outer wall of the inner ring, and the circumferential outer wall of the convex ring is provided with a second transmission part (111) for transmitting torque in cooperation with the first transmission part.

2. The transmission structure of a hub bearing unit and an outer ball cage according to claim 1, characterized in that: The spline shaft is coaxially arranged with the annular wall.

3. The transmission structure of the hub bearing unit and the outer ball cage according to claim 1, characterized in that: The first transmission part is a transmission gear.

4. The transmission structure of a hub bearing unit and an outer ball cage according to any one of claims 1-3, characterized in that: An oil seal (4) is provided between the outer ring and the inner ring.

5. The transmission structure of a hub bearing unit and an outer ball cage according to claim 4, characterized in that: The annular wall is located on the outer side of the oil seal.

6. The transmission structure of a hub bearing unit and an outer ball cage according to claim 5, characterized in that: The oil seal includes a skeleton (41) and a sealing lip (42) on the skeleton, which is in sealing engagement with the axial outer wall of the annular wall.

7. The transmission structure of a hub bearing unit and an outer ball cage according to claim 6, characterized in that: The convex ring is disposed within the sink groove.

Images