Bearing device for driving wheel, and its assembling method

A reassembling method for a bearing device of a driving wheel, the bearing device comprising:

• an assembly body and an outer joint member of a constant velocity universal joint fitted into an inner surface of a hub wheel, the assembly body including
• an outer member having an inner periphery in which double-row outer raceway surfaces are formed,
• an inner member including the hub wheel provided with a flange to be attached to the driving wheel, and an inner race, and having an outer periphery in which double-row inner raceway surfaces are formed so as to oppose the outer raceway surfaces, and
• double-row rolling elements interposed between the outer raceway surfaces of the outer member and the inner raceway surfaces of the inner member,
• the outer joint member of the constant velocity universal joint having a stem section which is coupled to the inner surface of the hub wheel by a recess-projection fitting structure,
• the recess-projection fitting structure including a plurality of projections which are formed on one of the hub wheel and the stem section and extend in an axial direction, and a plurality of recesses which are formed in another one of the hub wheel and the stem section by press-fitting the projections thereinto so as to transfer shapes of the projections such that the recesses fit on the projections with interference, the recesses being formed by accompanying cutting by the projections, respectively, wherein an end surface of each projection on a side of the one of the hub wheel and the stem section at which press-fitting is started is brought into contact in the axial direction with the another one of the hub wheel and the stem section having the recesses while not being allowed to pass through the another one of the hub wheel and the stem section having the recesses, and the hub wheel and the outer joint member coupled by the recess-projection fitting structure are separable from each other, said reassembling method comprising:
• when the outer joint member is to be reused and the assembly body is to be replaced with a new assembly body, separating the hub wheel and the outer joint member;
• and
• after said separating of the hub wheel and the outer joint member, assembling the stem section of the reused outer joint member into an inner surface of a hub wheel of the new assembly body, thereby reconfiguring a recess-projection fitting structure including a plurality of projections and a plurality of recesses fitted on the projections with interference.

A reassembling method for a bearing device of a driving wheel, the bearing device comprising:

• an assembly body and an outer joint member of a constant velocity universal joint fitted into an inner surface of a hub wheel, the assembly body including
• an outer member having an inner periphery in which double-row outer raceway surfaces are formed,
• an inner member including the hub wheel provided with a flange to be attached to the driving wheel, and an inner race, and having an outer periphery in which double-row inner raceway surfaces are formed so as to oppose the outer raceway surfaces, and
• double-row rolling elements interposed between the outer raceway surfaces of the outer member and the inner raceway surfaces of the inner member,
• the outer joint member of the constant velocity universal joint having a stem section which is coupled to the inner surface of the hub wheel by a recess-projection fitting structure,
• the recess-projection fitting structure including a plurality of projections which are formed on one of the hub wheel and the stem section and extend in an axial direction, and a plurality of recesses which are formed in another one of the hub wheel and the stem section by press-fitting the projections thereinto so as to transfer shapes of the projections such that the recesses fit on the projections with interference, the recesses being formed by accompanying cutting by the projections, respectively, wherein an end surface of each projection on a side of the one of the hub wheel and the stem section at which press-fitting is started is brought into contact in the axial direction with the another one of the hub wheel and the stem section having the recesses while not being allowed to pass through the another one of the hub wheel and the stem section having the recesses, and the hub wheel and the outer joint member coupled by the recess-projection fitting structure are separable from each other, said reassembling method comprising:
• when the assembly body is to be reused and the outer joint member is to be replaced with a new outer joint member, separating the hub wheel and the outer joint member;
• and
• after said separating of the hub wheel and the outer joint member, assembling a stem section of the new outer joint member into the inner surface of the hub wheel of the reused assembly body, thereby reconfiguring a recess-projection fitting structure including a plurality of projections and a plurality of recesses fitted on the projections with interference.