CN-116677713-B - Design method of high-rigidity riveting hub bearing unit

CN116677713BCN 116677713 BCN116677713 BCN 116677713BCN-116677713-B

Abstract

The invention relates to a design method of a high-rigidity riveting hub bearing unit, which belongs to the technical field of hub bearing units, and comprises a flange, wherein a spline assembly hole is formed in the flange, an outer ring movably sleeved with the flange is arranged on the flange, an inner ring which is mutually nested and riveted and limited with the flange is arranged between the rear part of the outer ring and the flange, a retainer is arranged between the front part of the outer ring and the flange and between the inner ring and the outer ring, a plurality of steel balls which are movably nested and connected with the retainer are arranged in the retainer, and the contact angle of the steel balls is 35 DEG + -3 deg. The problem of riveting pressure will be conducted to the inner circle by the ring flange and arouse inner circle size deformation is solved. The axial pre-tightening amount is increased, and the pre-tightening force is increased due to the increase of the pre-tightening amount, so that the bearing can obtain high rigidity. The rigidity of the bearing product is improved, the shock resistance of the bearing is improved, and the service life of the bearing is prolonged.

Inventors

DAI LONGLONG
ZHAO YONG
HE YINGJIE
WANG XIUJUAN

Assignees

杭州沃德汽车部件制造有限公司

Dates

Publication Date: 20260505
Application Date: 20230524

Claims (4)

1. A design method of a high-rigidity riveting hub bearing unit is characterized in that the hub bearing unit structure comprises a flange plate (5), spline assembly holes (6) are formed in the flange plate (5), an outer ring (2) movably sleeved with the flange plate (5) is arranged on the flange plate (5), an inner ring (1) which is nested and limited with the flange plate (5) is arranged between the rear part of the outer ring (2) and the flange plate (5), a retainer (7) is arranged between the front part of the outer ring (2) and the flange plate (5) and between the inner ring (1) and the outer ring (2), a plurality of steel balls (3) which are movably nested and connected with the retainer (7) are arranged in the retainer (7), and the contact angle of the steel balls (3) is 35 DEG +/-3 DEG; The design method comprises the following operation steps: Firstly, taking a value according to the tolerance of the inner diameter (10) of the inner ring di and the size of the flange disc shaft diameter (13), carrying out formula calculation on the fluctuation a of the theoretical design size of the inner ring diameter of the inner ring (1) after the inner ring is pressed into the flange disc shaft diameter (13), and subtracting the fluctuation a from the theoretical design size of the inner ring diameter to obtain the size of the inner ring di groove diameter (9); secondly, according to riveting deformation, the curvature size of the inner ring groove is reduced by 0.01-0.03 mm after spin riveting, and the curvature (8) of the inner ring Ri groove is increased by 0.02mm on the theoretical design size of the curvature of the inner ring groove; Step three, when the inner ring (1) is designed, the size design of the di-channel diameter (9) of the inner ring is smaller than the size design of the flange channel diameter (11) by a, and the size design of the Ri-channel curvature (8) of the inner ring is larger than the flange channel curvature (12) by 0.02mm; Fourthly, after the inner ring (1) is molded and is pressed into the flange plate for riveting, the diameter of the di groove of the inner ring (9) is increased by a, the diameter of the Ri groove of the inner ring (8) is reduced by 0.01-0.03 mm, and the Ri groove of the inner ring is offset with the previous optimization design, and at the moment, the diameter of the groove of the inner ring and the curvature of the groove are returned to theoretical design values and are the same as the diameter of the groove of the flange plate and the curvature of the groove.
2. The method of designing a high stiffness rivet hub bearing unit as set forth in claim 1, wherein the axial play of the rivet hub bearing unit is-0.045 to-0.015 mm.
3. The design method of the high-rigidity riveting hub bearing unit according to claim 1 is characterized in that the structure of the flange plate (5) for riveting and fixing the inner ring (1) is adopted, and the axial riveting force is up to more than 60 kN.
4. The design method of the high-rigidity riveting hub bearing unit according to claim 1, wherein a multi-lip framework sealing ring (4) is arranged between the front end of the outer ring (2) and the flange plate (5), and the multi-lip framework sealing ring (4) is arranged to play roles in dust cover and grease storage.

Description

Design method of high-rigidity riveting hub bearing unit Technical Field The invention relates to the technical field of hub bearing units, in particular to a design method of a high-rigidity riveting hub bearing unit. Background The hub bearing unit is a part applied to the hub shaft of the automobile and used for bearing and providing accurate guide for the rotation of the hub, and is an important component for the loading and rotation of the automobile, and the hub bearing unit is used for bearing axial load and radial load. The traditional design method is that the groove curvature dimension and the groove diameter dimension of the bearing inner ring and the flange plate are designed equally, deformation and influence on the inner ring after assembly riveting are not considered, the groove curvature dimension of the inner ring is reduced, the groove diameter dimension is increased, the contact angle of the steel ball is reduced, the axial bearing capacity of the bearing is reduced, meanwhile, the axial pre-tightening force of the bearing cannot be improved, and the bearing cannot meet the design requirement on rigidity or higher rigidity. Disclosure of Invention The invention mainly solves the defects existing in the prior art, provides a design method of a high-rigidity riveting hub bearing unit, and solves the problem that the riveting pressure is conducted to an inner ring from a flange plate to cause the inner ring to deform in size. The axial pre-tightening amount is increased, and the pre-tightening force is increased due to the increase of the pre-tightening amount, so that the bearing can obtain high rigidity. The rigidity of the bearing product is improved, the shock resistance of the bearing is improved, and the service life of the bearing is prolonged. The technical problems of the invention are mainly solved by the following technical proposal: The design method of the high-rigidity riveting hub bearing unit comprises the steps that the hub bearing unit structure comprises a flange, a spline assembly hole is formed in the flange, an outer ring movably sleeved with the flange is arranged on the flange, an inner ring which is mutually nested and riveted with the flange to limit is arranged between the rear part of the outer ring and the flange, retainers are arranged between the front part of the outer ring and the flange and between the inner ring and the outer ring, a plurality of steel balls movably nested and connected with the retainers are arranged in the retainers, and the contact angle of the steel balls is 35 degrees+/-3 degrees. The design method comprises the following operation steps: The first step is to calculate the fluctuation a of the theoretical design size of the inner ring diameter after the inner ring is pressed into the flange diameter according to the tolerance value of the inner diameter size of the inner ring di and the flange diameter size, and then to subtract the fluctuation a from the theoretical design size of the inner ring diameter to obtain the size of the inner ring di diameter. And secondly, according to the riveting deformation, the curvature size of the inner ring groove is reduced by 0.01-0.03 mm after spin riveting, and the curvature of the inner ring Ri groove is increased by 0.02mm on the theoretical design size of the curvature of the inner ring groove. And thirdly, when the inner ring is designed, the di-channel diameter of the inner ring is designed to be smaller than the channel diameter of the flange plate by a, and the Ri-channel curvature of the inner ring is designed to be 0.02mm larger than the channel curvature of the flange plate. And fourthly, forming the inner ring, pressing the inner ring into the flange plate for riveting, wherein the diameter of the di-channel of the inner ring is increased by a, the curvature of the Ri-channel of the inner ring is reduced by 0.01-0.03 mm, and the Ri-channel of the inner ring is offset with the previous optimized design, and at the moment, the diameter of the channel and the curvature of the channel of the inner ring return to theoretical design values and are the same as the diameter of the channel and the curvature of the channel of the flange plate. Preferably, the axial clearance of the riveting hub bearing unit is-0.045 to-0.015 mm. Preferably, the structure of riveting and fixing the inner ring by adopting the flange plate realizes that the axial riveting force reaches more than 60 kN. Preferably, a multi-lip framework sealing ring is arranged between the front end of the outer ring and the flange plate, and the multi-lip framework sealing ring is arranged to play roles in dustproof cover and grease storage. The invention can achieve the following effects: Compared with the prior art, the design method of the high-rigidity riveting hub bearing unit solves the problem that the riveting pressure is conducted to the inner ring from the flange plate to cause the inner ring to deform in size. The axial