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内周面に複列の外輪軌道を有し、使用時にも回転しない外輪と、車輪を支持する為のフランジを外周面の外端寄り部分に、第一の内輪軌道を外周面の内端寄り部分に、貫通孔を中心部に、それぞれ設けたハブと、この貫通孔に内嵌する為の軸部を外半部に設けると共に、内半部を等速ジョイントを構成する等速ジョイント用外輪とし、第二の内輪軌道を外周面の中間部に設けた、中空円筒状の駆動部材と、上記各外輪軌道と上記第一、第二の内輪軌道との間にそれぞれ複数個ずつ転動自在に設けられた転動体とを備え、上記軸部を上記貫通孔に内嵌した状態で、この軸部の外端部を径方向外方に塑性変形させ、凹凸係合させる事により、上記ハブと上記駆動部材とを結合固定した車輪駆動用軸受ユニットに於いて、上記軸部の内周面のうちで少なくとも上記フランジと径方向に重畳する部分を、軸方向外側から内側に向かうに従って内径が大きくなる方向に傾斜した円すい凹面とすると共に、その外周面をこの円すい凹面と同方向に同傾斜角で傾斜する円すい凸面とした押圧治具により、上記円すい凹面を押圧する事で、上記軸部の外周面を上記係止部に食い込ませた事を特徴とする車輪駆動用軸受ユニット。
A double row outer ring raceway on the inner peripheral surface, the outer ring that does not rotate during use, and the flange for supporting the wheel on the outer end portion of the outer peripheral surface, the first inner ring track near the inner end of the outer peripheral surface The outer ring for the constant velocity joint, in which the hub provided in the center with the through hole and the shaft for fitting in the through hole are provided in the outer half, and the inner half constitutes the constant velocity joint And a plurality of second inner ring raceways provided between the outer ring raceway and the first and second inner ring raceways. The hub is formed by plastically deforming the outer end portion of the shaft portion radially outward in a state in which the shaft portion is fitted in the through hole, and engaging with the concave and convex portions. In the wheel drive bearing unit in which the driving member is coupled and fixed, of the inner peripheral surface of the shaft portion, At least the portion that overlaps with the flange in the radial direction is a conical concave surface that is inclined in a direction in which the inner diameter increases from the outer side in the axial direction toward the inner side, and the outer peripheral surface has the same inclination angle in the same direction as the conical concave surface. A wheel drive bearing unit characterized in that the outer peripheral surface of the shaft portion is bitten into the engaging portion by pressing the conical concave surface with a pressing jig having an inclined conical convex surface.
円すい凹面の中心軸に対する傾斜角を１０度以下とした、請求項１に記載した車輪駆動用軸受ユニット。
The wheel drive bearing unit according to claim 1, wherein an inclination angle with respect to the central axis of the conical concave surface is 10 degrees or less.
貫通孔の外端部内周面又は軸部の外端部外周面に、当該周面から径方向に凹入する状態で形成した凹溝から成る、又は、複数の凹部と凸部とを周方向及び軸方向に交互に隣り合わせて成る、係止部を設けている、請求項１又は請求項２に記載した車輪駆動用軸受ユニット。The inner end surface of the outer end portion of the through hole or the outer periphery portion of the outer end portion of the shaft portion is formed of a concave groove formed in a state of being radially recessed from the peripheral surface, or a plurality of concave portions and convex portions are arranged in the circumferential direction. The wheel drive bearing unit according to claim 1, further comprising a locking portion that is alternately adjacent to each other in the axial direction.
JP2003373951A2003-11-042003-11-04
Wheel drive bearing unit
Expired - Fee RelatedJP4161875B2
(en)