Bearing apparatus for vehicle
First Claim
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1. A bearing apparatus for a vehicle, comprising:
- a hub wheel having a hollow hole;
a rolling bearing mounted to an outer periphery of said hub wheel;
a constant velocity joint for connecting an input shaft to said hub wheel such that said input shaft can incline, said constant velocity joint having an outer ring including a cylindrical portion in which an inclination guide element with respect to said input shaft is accommodated and a shaft continuously formed on the cylindrical portion and fitted into said hollow hole of said hub wheel in a state in which said outer ring shaft is prevented from rotating in said hollow hole of said hub wheel in its circumferential direction;
a pressing member mounted to said outer ring shaft of said constant velocity joint; and
a fixing member whose outer diameter side is fixed to a predetermined position of said hub wheel on a vehicle-outer side and whose inner diameter side is smaller than said hollow hole of said hub wheel, wherein said fixing member is sandwiched between said pressing member and a vehicle-outer side end face of said outer ring shaft in the axial direction so that said outer ring of said constant velocity joint is coupled to said hub wheel.
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Abstract
In a construction in which a double row rolling bearing and a constant velocity joint are mounted to a hub wheel, a fixing ring fixedly mounted to a vehicle-outer side opening of the hub wheel is sandwiched between a vehicle-outer side end face of an outer ring shaft of the constant velocity joint and a bolt integrally mounted to the shaft in the axial direction, thereby coupling the outer ring of the constant velocity joint to the hub wheel. In this case, a simple coupling operation only for mounting the bolt to the shaft suffices, and a pre-load that has been applied to the rolling bearing is maintained invariably.
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Citations
10 Claims
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1. A bearing apparatus for a vehicle, comprising:
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a hub wheel having a hollow hole;
a rolling bearing mounted to an outer periphery of said hub wheel;
a constant velocity joint for connecting an input shaft to said hub wheel such that said input shaft can incline, said constant velocity joint having an outer ring including a cylindrical portion in which an inclination guide element with respect to said input shaft is accommodated and a shaft continuously formed on the cylindrical portion and fitted into said hollow hole of said hub wheel in a state in which said outer ring shaft is prevented from rotating in said hollow hole of said hub wheel in its circumferential direction;
a pressing member mounted to said outer ring shaft of said constant velocity joint; and
a fixing member whose outer diameter side is fixed to a predetermined position of said hub wheel on a vehicle-outer side and whose inner diameter side is smaller than said hollow hole of said hub wheel, wherein said fixing member is sandwiched between said pressing member and a vehicle-outer side end face of said outer ring shaft in the axial direction so that said outer ring of said constant velocity joint is coupled to said hub wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
a vehicle-outer side opening of said hollow hole of said hub wheel is increased in diameter to form a diameter-increased portion, said fixing member is fixed to in the diameter-increased portion of said hub wheel. -
3. The bearing apparatus for a vehicle according to claim 2, wherein
said fixing member is a fixing ring having an outer diameter side fitted and fixed to said diameter-increased portion of said hub wheel by press-fitting, a vehicle-outer side end of said outer ring shaft of said constant velocity joint has a screw hole, said pressing member is a bolt threadedly engaged in said screw hole, said fixing ring is sandwiched between said vehicle-outer side end face of said outer ring shaft and an inner end face of a head of said bolt threadedly engaged in said screw hole in its axial direction in a state in which said fixing ring is positioned at least in its axial direction. -
4. The bearing apparatus for a vehicle according to claim 2, wherein
said fixing member is fixed to the diameter-increased portion of said hub wheel by press-fitting, this press-fit force is set greater than an axial load applied to the outer ring of said constant velocity joint in a direction of the vehicle-outer side. -
5. The bearing apparatus for a vehicle according to claim 2, wherein
said fixing member is a fixing ring having an outer diameter side that can be fixed to said diameter-increased portion of said hub wheel by press-fitting, the vehicle-outer side end of said outer ring shaft of said constant velocity joint has a small-diameter projection, a male screw is provided on an outer periphery of said small-diameter projection, said pressing member is a nut threadedly engaged with an outer periphery of said small-diameter projection, said fixing ring is mounted to said small-diameter projection, and said nut is mounted to said small-diameter projection, said fixing ring is sandwiched between said nut and the vehicle-outer side end face of said outer ring shaft by the threadedly engagement of said nut to said small-diameter projection so that said outer ring of said constant velocity joint is coupled to said hub wheel. -
6. The bearing apparatus for a vehicle according to claim 5, wherein
said fixing ring includes a bottom having a through hole through which said small-diameter projection can be inserted in its axial direction and a cylindrical portion continuously formed on said bottom, said fixing ring is press-fitted into said diameter-increased portion in a state in which said bottom is directed into said diameter-increased portion, and said fixing ring is mounted to said small-diameter projection through said through hole. -
7. The bearing apparatus for a vehicle according to claim 6, wherein
said fixing ring is formed with a radially outward swelling portion formed on the cylindrical portion of said fixing ring on the vehicle-inner side, said diameter-increased portion of said hub wheel is formed with a groove on the vehicle-inner side, said swelling portion is engaged in said groove in a state in which said fixing ring is press-fitted into said diameter-increased portion so that said fixing ring is prevented from falling out to the vehicle-outer side. -
8. The bearing apparatus for a vehicle according to claim 1, wherein
said hollow hole of said hub wheel is provided with a female spline, said outer ring shaft of said constant velocity joint is provided with a male spline, said outer ring shaft is prevented from rotating in a circumferential direction with respect to said hub wheel by means of fitting of both said splines. -
9. The bearing apparatus for a vehicle according to claim 8, wherein
said spline fitting has a margin between biting teeth. -
10. The bearing apparatus for a vehicle according to claim 1, wherein
an shaft end of said hub wheel on the vehicle-inner side is bent and deformed radially outward, said shaft end is caulked on an outer end face of a vehicle-inner side inner ring of said rolling bearing and is formed as a caulked portion, said cylindrical portion of said outer ring of said constant velocity joint is in no contact or in slight contact with said caulked portion of said hub wheel.
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Specification