Bearing device for drive wheel
First Claim
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1. A drive wheel bearing device comprising:
- an outer member having double-row outer races on an inner periphery thereof;
an inner member including double-row inner races opposite the outer races of the outer member, a first inner member, and a second inner member formed with at least one of the double-row inner races, the first inner member and the second inner member being inseparably coupled together at a radial swaged portion that is formed by a radially outward plastic deformation of the first inner member;
double-row rolling elements interposed between the outer member and the inner member; and
a constant velocity joint including an outer joint member fitted to an inner periphery of the first inner member such as to transmit torque, the swaged portion being in contact with the outer joint member in an axial direction, wherein part of the swaged portion making contact with the outer joint member is a flat surface, and variations in the axial position of the flat surface are restricted within a specified limit.
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Abstract
The wheel hub 30 includes a radial swaged portion 37 formed by a radially outward plastic deformation of one end thereof, whereby an inner ring 40 fitted onto the wheel hub 30 is united therewith. An outer joint member 72 of a constant velocity joint 70 is press-fitted into the wheel hub 30, causing serrations 81 on the inner periphery of the wheel hub 30 and a serrated shaft 82 of the outer joint member 72 to engage with each other. The tooth profile of the serrations 81 on the wheel hub 30 is controlled within a predetermined specified range over the entire axial length thereof, whereby radial contraction of the serrations 81 caused by swaging is reduced.
55 Citations
24 Claims
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1. A drive wheel bearing device comprising:
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an outer member having double-row outer races on an inner periphery thereof;
an inner member including double-row inner races opposite the outer races of the outer member, a first inner member, and a second inner member formed with at least one of the double-row inner races, the first inner member and the second inner member being inseparably coupled together at a radial swaged portion that is formed by a radially outward plastic deformation of the first inner member;
double-row rolling elements interposed between the outer member and the inner member; and
a constant velocity joint including an outer joint member fitted to an inner periphery of the first inner member such as to transmit torque, the swaged portion being in contact with the outer joint member in an axial direction, wherein part of the swaged portion making contact with the outer joint member is a flat surface, and variations in the axial position of the flat surface are restricted within a specified limit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A drive wheel bearing device comprising:
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an outer member having double-row outer races on an inner periphery thereof;
an inner member including double-row inner races opposite the outer races of the outer member, a first inner member, and a second inner member formed with at least one of the double-row inner races, the first inner member and the second inner member being inseparably coupled together at a flange-like swaged portion that is formed by a radially outward plastic deformation of one end of the first inner member;
double-row rolling elements interposed between the outer member and the inner member; and
a constant velocity joint including an outer joint member press-fitted to an inner periphery of the first inner member with torque transmission means formed therebetween that transmits torque by engagement of a plurality of axially extending teeth, wherein the torque transmitting teeth of the first inner member have a tooth profile that is controlled within a specified range over the entire axial length of the teeth. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A drive wheel bearing device for supporting a wheel such as to be rotatable relative to the vehicle body, comprising:
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an outer member formed with double-row outer races on an inner periphery thereof;
an inner member including double-row inner races opposite the outer races of the outer member and a flange for attachment of a wheel both formed on an outer periphery thereof, and a swaged portion that is formed by a radially outward plastic deformation of one end thereof;
double-row rolling elements interposed between respective races of the outer member and the inner member; and
a constant velocity joint including an outer joint member abutted on the swaged portion of the inner member, the outer joint member having a stem part fitted into the inner member such as to transmit torque via serrations, wherein mating parts of the inner member and the outer joint member have undergone rust proof treatment. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification