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Bearing device for axle

  • US 6,851,865 B2
  • Filed: 08/10/2001
  • Issued: 02/08/2005
  • Est. Priority Date: 08/11/2000
  • Status: Expired due to Fees
First Claim
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1. A bearing device for an axle, comprising:

  • a hub wheel, having a hollow shaft portion;

    a rolling bearing, outwardly fitted to the hollow shaft portion of the hub wheel;

    a constant velocity joint, tiltably linking a driving shaft with the hub wheel and having an outer ring; and

    a fastening member, fastening the constant velocity joint to the hub wheel;

    wherein the outer ring of the constant velocity joint has a cylindrical portion accommodating tilt movement guiding elements with respect to the driving shaft and an outer ring shaft portion, formed integrally with the cylindrical portion and inserted into the hollow shaft portion of the hub wheel so as not to be rotated in a circumferential direction;

    the fastening member is mounted to a vehicle outer side of the outer ring shaft portion of the constant velocity joint;

    a held portion is provided in the hollow shaft portion of the hub wheel, between an axial intermediate position on said hollow shaft portion of the hub wheel and a vehicle outer side in the hollow shaft portion of the hub wheel;

    the held portion is sandwiched in an axial direction between an axial intermediate position in the outer ring shaft portion of the constant velocity joint and the fastening member, thereby the outer ring of the constant velocity joint is combined with the hub wheel in a state of being positioned in an axial direction;

    the hollow shaft portion of the hub wheel has a radially inward annular member in an inner periphery of the vehicle outer side thereof;

    the held portion is formed by the axial intermediate position in the hollow shaft portion of the hub wheel and the annular member, and the held portion is sandwiched from an axial direction by the axial intermediate position in the outer ring shaft portion of the constant velocity joint and the fastening member, thereby the outer ring of the constant velocity joint is combined with the hub wheel in a state of being positioned in anaxial direction, a peripheral groove is provided in the inner periphery in the vehicle outer side of the hollow shaft portion of the hub wheel, and the annular member comprises a snap ring latched together with the peripheral groove and extending in a radially inward direction;

    the outer ring shaft portion of the constant velocity joint is fitted to the hollow shaft portion of the hub wheel so as not to be rotated, and the snap ring is inserted into the peripheral groove of the hollow shaft portion in a state of a diameter thereof being elastically expanded and is also fixed to a shaft end in the vehicle outer side of the outer ring shaft portion in a state of being positioned in an axial direction;

    the peripheral groove converts a diameter expanding elastic first force of the snap ring into a second force to draw the outer ring shaft portion to a vehicle outer side.

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