Bearing device for wheel

A technology for bearing devices and wheels, applied in bearing assembly, bearings, axles, etc., can solve the problems of large number of parts, poor operability, poor part management, etc., to avoid damage to tooth surfaces, improve assembly, and excellent productivity Effect
CN101784398AActive Publication Date: 2010-07-21NTN CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NTN CORP
Publication Date
2010-07-21

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Abstract

A bearing device for a wheel, in which circumferential play is suppressed, in which a hub ring and an outer joint member of a constant velocity universal joint can be connected to each other with good workability, and in which the hub ring and the outer joint member are adapted to be separable for excellent maintainability. In the bearing device, the hub ring (1), a double-row roller bearing (2), and the constant universal joint (3) are unitized, and the hub ring (1) and a shaft (12) of the outer joint member of the constant universal joint (3), which is fitted in a hole (22) of the hub ring (1), are separably joined to each other by a groove-ridge fit structure (M). Ridges (35) extending in the axial direction are provided either the outer diameter surface of the shaft (12) of the outer joint member or the inner diameter surface (37) of the hole (22) of the hub ring (1). The ridges (35) are press-fitted into the other in the axial direction to form grooves (36) in the other such that the grooves (36) are in intimate contact with the ridges (35). Thus, the groove-ridge fit structure (M) is formed, in which the ridges (35) and the grooves (36) are in close contact with each other in the entire area of the fit-contact portion (38) between the ridges (35) and the grooves (36). The groove-ridge fit structure (M) allows separation between the hub ring and the outer joint member performed by pulling force applied in the axial direction.
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Description

technical field

[0001] The present invention relates to a wheel bearing device for rotatably supporting a wheel with respect to a vehicle body in a vehicle such as an automobile. Background technique

[0002] In the wheel bearing device, the so-called first-generation structure using multiple rows of rolling bearings alone has evolved to the second-generation structure that integrally has a body mounting flange on an external member, and has further developed a wheel mounting flange integrally. In the third generation, the inner raceway surface of one side of the multi-row rolling bearing is integrally formed on the outer periphery of the hub wheel of the hub wheel. Furthermore, a constant velocity universal joint is integrated with the hub wheel, and the constant velocity universal joint is developed in the structure of the constant velocity universal joint The outer periphery of the outer joint member is a fourth-generation wheel bearing device in which the other inner rac...

Claims

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