Driving Wheel Bearing Apparatus
First Claim
1. A driving wheel bearing apparatus having a double row rolling bearing and a constant velocity universal joint that are detachably unitized, the apparatus comprising:
- the double row rolling bearing including an outer member with a body mounting flange to be mounted on a car body, the body mounting flange is integrally formed on the outer circumference of the outer member, the outer member is integrally formed with double row outer raceway surfaces on its inner circumference;
an inner member including a wheel hub and an inner ring, the wheel hub includes a wheel mounting flange for mounting a wheel, the wheel mounting flange is integrally formed at one end of the wheel hub, one inner raceway surface formed on the outer circumference of the wheel hub, the one inner raceway surface is arranged opposite to one of the double row outer raceway surfaces, a cylindrical portion axially extending from the inner raceway surface, the inner ring is press-fit onto the wheel hub, the inner ring including the other inner raceway surface formed on its outer circumference, the other inner raceway surface arranged opposite to the other double row outer raceway surface;
a double row rolling element is freely rollably contained between the raceway surfaces of the inner member and the outer member;
the inner ring is secured to the wheel hub by a caulked portion, the caulked portion is formed by plastically deforming an end of the cylindrical portion radially outward;
the constant velocity universal joint has an outer joint member having a cup-shaped mouth portion, a shoulder portion, forming the bottom of the mouth portion, and a cylindrical shaft portion, axially extending from the shoulder portion, the shaft portion has an internal thread, the mouth portion, the shoulder portion, and the shaft portion are integrally formed in the outer joint member;
face splines are formed at the respective end faces of the shoulder portion of the outer joint member and the caulked portion, the face splines are supported with pressure by a fastening bolt that abuts an outer side end face of the wheel hub and is threadedly connected to the internal thread of the shaft portion, and the double row rolling bearing and the constant velocity universal joint are coupled together in such a way that the double row rolling bearing and the constant velocity universal joint can transmit torque and are axially separable; and
compressive remaining stress is placed on the surfaces of the face splines as a result of surface modification.
1 Assignment
0 Petitions
Accused Products
Abstract
A driving wheel bearing apparatus has an inner ring 5 secured to a wheel hub 1 by a caulked portion 13. An outer joint member 14 of a constant velocity universal joint 3 has a shoulder portion 19 and a cylindrical shaft portion. Face splines 19a and 13a are formed at the end faces of the shoulder portion 19 and the caulked portion 13. Face splines 19a and 13a are supported with pressure by a fastening bolt 21 that abuts the outer side end face of the wheel hub 1 and is threadedly connected to an internal thread 20a of the shaft portion 20. Compressive remaining stress is placed on the surfaces of the face splines 19a and 13a as a result of surface modification, by shot peening. The surface hardness is set at 300 Hv or more.
-
Citations
29 Claims
-
1. A driving wheel bearing apparatus having a double row rolling bearing and a constant velocity universal joint that are detachably unitized, the apparatus comprising:
-
the double row rolling bearing including an outer member with a body mounting flange to be mounted on a car body, the body mounting flange is integrally formed on the outer circumference of the outer member, the outer member is integrally formed with double row outer raceway surfaces on its inner circumference; an inner member including a wheel hub and an inner ring, the wheel hub includes a wheel mounting flange for mounting a wheel, the wheel mounting flange is integrally formed at one end of the wheel hub, one inner raceway surface formed on the outer circumference of the wheel hub, the one inner raceway surface is arranged opposite to one of the double row outer raceway surfaces, a cylindrical portion axially extending from the inner raceway surface, the inner ring is press-fit onto the wheel hub, the inner ring including the other inner raceway surface formed on its outer circumference, the other inner raceway surface arranged opposite to the other double row outer raceway surface; a double row rolling element is freely rollably contained between the raceway surfaces of the inner member and the outer member; the inner ring is secured to the wheel hub by a caulked portion, the caulked portion is formed by plastically deforming an end of the cylindrical portion radially outward; the constant velocity universal joint has an outer joint member having a cup-shaped mouth portion, a shoulder portion, forming the bottom of the mouth portion, and a cylindrical shaft portion, axially extending from the shoulder portion, the shaft portion has an internal thread, the mouth portion, the shoulder portion, and the shaft portion are integrally formed in the outer joint member; face splines are formed at the respective end faces of the shoulder portion of the outer joint member and the caulked portion, the face splines are supported with pressure by a fastening bolt that abuts an outer side end face of the wheel hub and is threadedly connected to the internal thread of the shaft portion, and the double row rolling bearing and the constant velocity universal joint are coupled together in such a way that the double row rolling bearing and the constant velocity universal joint can transmit torque and are axially separable; and compressive remaining stress is placed on the surfaces of the face splines as a result of surface modification. - View Dependent Claims (2, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
3. A driving wheel bearing apparatus having a double row rolling bearing and a constant velocity universal joint that are detachably unitized, the apparatus comprising:
-
the double row rolling bearing including an outer member with a body mounting flange to be mounted on a car body, the body mounting flange is integrally formed on the outer circumference of the outer member, and the outer member is integrally formed with double row outer raceway surfaces on its inner circumference; an inner member includes a wheel hub and a cylindrical inner ring member, the wheel hub has a wheel mounting flange for mounting a wheel, the wheel mounting flange is integrally formed at one end of the wheel hub, one inner raceway surface is formed, on the outer circumference of the wheel hub, the one inner raceway surface is arranged opposite to the double row outer raceway surface, a cylindrical portion axially extends from the inner raceway surface, the inner ring member is press-fit onto the wheel hub, the inner ring has the other inner raceway surface formed, on its outer circumference, the other inner raceway surface is arranged opposite to the other double row outer raceway surface; a double row rolling element is freely rollably contained between the raceway surfaces of the inner member and the outer member; the constant velocity universal joint has an outer joint member, having a cup-shaped mouth portion, a shoulder portion, forming the bottom of the mouth portion, and a cylindrical shaft portion, axially extending from the shoulder portion, the shaft portion has an internal thread, the mouth portion, the shoulder portion, and the shaft portion are integrally formed in the outer joint member; face splines are formed at the respective end faces of the shoulder portion of the outer joint member and the inner ring member; the face splines are supported with pressure by a fastening bolt that abuts an outer side end face of the wheel hub and is threadedly connected to the internal thread of the shaft portion, the double row rolling bearing and the constant velocity universal joint are coupled together in such a way that the double row rolling bearing and the constant velocity universal joint can transmit torque and are axially separable; the wheel hub and the inner ring member are integrally plastically coupled together, and compressive remaining stress is placed on the surfaces of the face splines as a result of a surface modification. - View Dependent Claims (4, 5, 6, 7, 8, 9)
-
Specification