Hub bearing unit with anti-creep function

Abstract

The utility model discloses a hub bearing unit with an anti-creep function. The problem that wriggling occurs between an inner ring of an existing hub bearing unit and a shaft neck of a flange plate is mainly solved. The bearing is characterized in that a positioning groove (121) is formed in the axial outer end face of the inner ring, a flange (111) is arranged at the outer end of the shaft neck, and part of the flange extends into the positioning groove. According to the hub bearing unit with the anti-creeping function, after the shaft neck is machined, a part of the shaft neck falls into the positioning groove to position the inner ring, and creeping of the shaft neck is prevented.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to a wheel hub bearing unit with an anti-creep function. Background Art

[0002] For the 2.1st, 2.5th and 3rd generation wheel hub bearing units, the fit between the inner ring and the flange is mainly an interference fit. After the wheel hub bearing unit is installed on the vehicle and operated, due to the influence of complex alternating forces for a long time, the interference fit between the inner ring and the flange shaft diameter will creep. At present, there are three main methods for preventing creep in the global market: 1. Increase the interference between the inner diameter of the inner ring and the flange shaft diameter; 2. Increase the locking torque of the product nut or ball cage nut; 3. Increase the clamping force of the inner ring by increasing the riveting pressure. However, these three methods of preventing creep all have certain defects: 1. Increasing the interference will cause the groove diameter of the inner ring and the internal spline of the flange to deform more; 2. Increasing the locking torque of the nut will cause the clearance of the product to change, affecting the life; 3. Increasing the clamping force of the inner ring will cause the stress of the inner ring to increase sharply and eventually cause the inner ring to crack. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a hub bearing unit with an anti-creep function, which mainly solves the problem of creep occurring between the inner ring of the hub bearing unit and the flange journal.

[0004] The technical solution adopted by the utility model is:

[0005] A wheel hub bearing unit with anti-creep function includes a flange and an outer ring, the flange includes a shaft neck, an inner ring is provided on the outer wall of the shaft neck, a rolling element is provided between the outer ring and the inner ring, a positioning groove is provided on the axial outer end face of the inner ring, and a flange is provided at the outer end of the shaft neck, and part of the flange extends into the positioning groove.

[0006] The flange is made integrally with the journal.

[0007] The positioning groove extends along the radial direction of the inner ring.

[0008] There are three or more positioning grooves.

[0009] The interval angles between any two adjacent positioning grooves are the same.

[0010] The depth of the positioning groove is 0.3mm~0.5mm.

[0011] The positioning groove is a structure that penetrates through both ends along the radial direction of the inner ring.

[0012] The rolling element is a steel ball.

[0013] The beneficial effect of the utility model is that the utility model provides a hub bearing unit with an anti-creep function, and after the journal is processed, a part of it falls into the positioning groove to position the inner ring and prevent it from creeping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0015] Figure 2 It is a schematic cross-sectional view of an inner ring of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings: As shown in the figure, a hub bearing unit with anti-creep function includes a flange 1 and an outer ring 2, the flange includes a journal 11, the outer wall of the journal is provided with an inner ring 12, a rolling element 3 is provided between the outer ring and the inner ring, the axial outer end face of the inner ring is provided with a positioning groove 121, the outer end of the journal is provided with a flange 111, and part of the flange extends into the positioning groove. The design of this new inner ring structure has excellent anti-creep performance after riveting, and has no effect on normal assembly; the products before and after optimization are compared and verified, and the results show that the inner ring of the product before optimization has creep, and the product after optimization has no creep phenomenon. The conventional means of flanging the journal may be rotary riveting, etc., and the rotary rivet will partially extend into the positioning groove to fix the inner ring.

[0017] In this embodiment, as shown in the figure, the flange is made integrally with the journal.

[0018] In this embodiment, as shown in the figure, the positioning groove extends along the radial direction of the inner ring, which is more conducive to processing.

[0019] In this embodiment, as shown in the figure, there are three or more positioning grooves.

[0020] In this embodiment, as shown in the figure, the interval angle between any two adjacent positioning grooves is the same, which can better achieve the positioning function.

[0021] In this embodiment, as shown in the figure, the depth of the positioning groove is 0.3 mm to 0.5 mm.

[0022] In this embodiment, as shown in the figure, the positioning groove is a structure that penetrates both ends along the radial direction of the inner ring, which is more convenient for processing.

[0023] In this embodiment, as shown in the figure, the rolling element is a steel ball.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A wheel hub bearing unit with an anti-creep function, comprising a flange (1) and an outer ring (2), wherein the flange comprises a journal (11), an inner ring (12) is arranged on the outer wall of the journal, and a rolling element (3) is arranged between the outer ring and the inner ring, characterized in that: The axial outer end surface of the inner ring is provided with a positioning groove (121), and the outer end of the shaft neck is provided with a flange (111), and a portion of the flange extends into the positioning groove.

2. The wheel hub bearing unit with anti-creep function according to claim 1, characterized in that: The flange is made integrally with the journal.

3. The wheel hub bearing unit with anti-creep function according to claim 2, characterized in that: The positioning groove extends along the radial direction of the inner ring.

4. The wheel hub bearing unit with anti-creep function according to claim 3, characterized in that: There are three or more positioning grooves.

5. The wheel hub bearing unit with anti-creep function according to claim 4, characterized in that: The interval angles between any two adjacent positioning grooves are the same.

6. The wheel hub bearing unit with anti-creep function according to claim 5, characterized in that: The depth of the positioning groove is 0.3mm~0.5mm.

7. The wheel hub bearing unit with anti-creep function according to claim 6, characterized in that: The positioning groove is a structure that penetrates through both ends along the radial direction of the inner ring.

8. The wheel hub bearing unit with anti-creep function according to claim 7, characterized in that: The rolling element is a steel ball.

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