Wheel supporting system

1. A wheel supporting system comprising:

a wheel hub which includes a hub shaft defining an inside hole therein and to which a wheel is to be attached; and

a constant velocity joint which includes an outer ring including an outer ring shaft portion extended integrally from an end face of the outer ring,

wherein the wheel hub and the constant velocity joint are coupled together by the outer ring shaft portion being fittingly inserted into the inside hole of the hub shaft,

wherein internal splines and external splines are formed on an inner circumferential surface of the inside hole of the hub shaft and an outer circumferential surface of the outer ring shaft portion, respectively, in such a manner as to mesh with each other,

wherein side face splines are formed on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint, respectively, in such a manner as to mesh with each other, and

wherein the wheel hub and the constant velocity joint are coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint by the internal and external splines and the side face splines meshing with each other, respectively.

2. The wheel supporting system according to claim 1 , wherein the side face splines formed on the end face of the hub shaft are integral with the internal splines.

3. The wheel supporting system according to claim 1 , wherein the side face splines formed on the end face of the outer ring of the constant velocity joint are integral with the external splines, and

wherein the side face splines formed on the end face of the hub shaft are integral with the internal splines.

4. A wheel supporting system comprising:

a hub shaft of a wheel hub to which a wheel is to be attached; and

an outer ring of a constant velocity joint which is coupled to the hub shaft in such a manner that torque can be transmitted therebetween,

wherein a radially inner side annular portion and a radially outer side annular portion are provided both on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint which is brought into abutment with the end face of the hub shaft,

wherein side face splines are formed individually on either annular portions of the radially inner side annular portions and the radially outer side annular portions in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint, and

wherein flat surfaces are formed individually on the other annular portions in such a manner as to be brought into close contact with each other so as to form an annular seal portion.

5. The wheel supporting system according to claim 4 , wherein the side face splines are formed individually on the radially inner side annular portions of the end face of the hub shaft and the end face of the outer ring of the constant velocity joint, and

wherein the flat surfaces are formed individually on the radially outer side annular portions in such a manner as to form the annular seal portion.

6. A wheel supporting system comprising:

a hub shaft of a wheel hub to which a wheel is to be attached; and

an outer ring of a constant velocity joint which is coupled to the hub shaft in such a manner that torque can be transmitted therebetween,

wherein side face splines are formed individually on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint which is brought into abutment with the end face of the hub shaft in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint,

wherein a cover member is mounted between an outer ring of a rolling bearing which is installed on an outer circumference of the hub shaft and the outer ring of the constant velocity joint in such a manner as to cover a meshing portion between the side face splines and a clearance defined between both the outer rings for sealing,

wherein a vehicle speed detector is disposed on the cover member or a vehicle body side member, and

wherein a pulser ring is installed in an interior of the cover member in such a manner as to face a detecting portion of the vehicle speed detector.

7. The wheel supporting system according to claim 6 , wherein the cover member comprises:

a core metal including a cylindrical portion which is fittingly press fitted in an inner circumferential surface of the outer ring of the rolling bearing of the hub shaft, and an annular portion which projects from an end portion of the cylindrical portion towards an outer circumferential surface of the outer ring of the constant velocity joint; and

an elastic seal material which is joined integrally to the annular portion of the core metal and includes a distal end portion brought into close contact with the outer circumferential surface of the outer ring of the constant velocity joint.

8. The wheel supporting system according to claim 7 , wherein an insertion hole which corresponds to the detecting portion of the vehicle speed detector is formed in the cylindrical portion of the core metal of the cover member, and

wherein the detecting portion comes close to an outer circumferential surface of the pulser ring by inserting the detecting portion of the vehicle speed detector into the insertion hole so as to be mounted on the cylindrical portion of the core metal.

9. The wheel supporting system according to claim 8 ,

wherein a radially inner side annular portion and a radially outer side annular portion are provided on an end face of the hub shaft and a end face of the outer ring of the constant velocity joint which is brought into abutment with the end face of the hub shaft,

wherein side face splines are formed individually on either annular portions of the radially inner side annular portion and the radially outer side annular portion in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint, and

wherein flat surfaces are formed individually on the other annular portions in such a manner as to be brought into close contact with each other so as to form an annular seal portion.

10. The wheel supporting system according to claim 7 , wherein the core metal of the cover member is formed of a non-magnetic material,

wherein the detecting portion of the vehicle speed detector is installed to lie close to an outer circumferential surface of the cylindrical portion of the core metal, and

wherein the pulser ring made up of a magnetized ring is installed in a position which corresponds to the detecting portion of the vehicle speed detector and in such a manner as to lie close to an inner circumferential surface of the cylindrical portion of the core metal.

11. The wheel supporting system according to claim 10 ,

wherein a radially inner side annular portion and a radially outer side annular portion are provided on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint which is brought into abutment with the end face of the hub shaft,

wherein side face splines are formed individually on either annular portions of the radially inner side annular portion and the radially outer side annular portion in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint, and

wherein, flat surfaces are formed individually on the other annular portions in such a manner as to be brought into close contact with each other so as to form an annular seal portion.

12. The wheel supporting system according to claim 7 ,

wherein a radially inner side annular portion and a radially outer side annular portion are provided on an end face the hub shaft and end face of the outer of the constant velocity joint which is brought into abutment with the end face of the hub shaft,

wherein side face splines are formed individually on either annular portions of the radially inner side annular portion and the radially outer side annular portion in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint, and

wherein flat surfaces are formed individually on the other annular portions in such a manner as to be brought into close contact with each other so as to form an annular seal portion.

13. The wheel supporting system, according to claim 6 ,

wherein a radially inner side annular portion and a radially outer side annular portion are provided on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint which is brought into abutment with the end face of the hub shaft,

wherein side face splines are formed individually on either annular portions of the radially inner side annular portion and the radially outer side annular portion in such a manner as to mesh with each other so that the wheel hub and the outer ring of the constant velocity joint can be coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint, and

wherein flat surfaces are formed individually on the other annular portions in such a manner as to be brought into close contact with each other so as to form an annular seal portion.

14. The wheel supporting system according to claim 13 , wherein the flat surfaces are formed on the radially inner side annular portions.

15. The wheel supporting system according to claim 13 , wherein the flat surfaces are formed on the radially outer side annular portions.