Rotational torque inspection method for bearing device for vehicle wheel, and rotational torque inspection device for bearing device for vehicle wheel

A rotational torque inspection method for a bearing device for a vehicle wheel including:

• an outer member having a plurality of rows of outer raceway surfaces on an inner periphery;
• an inner member including a hub ring having a small-diameter step portion extending in an axial direction on an outer periphery and an inner ring press-fitted into the small-diameter step portion of the hub ring, the inner member having a plurality of rows of inner raceway surfaces facing the plurality of rows of outer raceway surfaces;
• and
• a plurality of rows of rolling bodies rollably accommodated between both raceway surfaces of the outer member and the inner member, the rotational torque inspection method comprising:
• a crimping step of crimping an inner-side end portion of the small-diameter step portion into which the inner ring is press-fitted to the inner ring;
• a post-crimping rotational torque measurement step of measuring post-crimping rotational torque of the bearing device for a vehicle wheel when the inner member and the outer member are relatively rotated after the crimping step;
• and
• a post-crimping rotational torque determination step of determining appropriateness or inappropriateness of the post-crimping rotational torque depending on whether or not the post-crimping rotational torque measured in the post-crimping rotational torque measurement step falls within a range of a reference value.

A rotational torque inspection device for a bearing device for a vehicle wheel including:

• an outer member having a plurality of rows of outer raceway surfaces on an inner periphery;
• an inner member including a hub ring having a small-diameter step portion extending in an axial direction on an outer periphery and an inner ring press-fitted into the small-diameter step portion of the hub ring, the inner member having a plurality of rows of inner raceway surfaces facing the plurality of rows of outer raceway surfaces;
• and
• a plurality of rows of rolling bodies rollably accommodated between both raceway surfaces of the outer member and the inner member, the rotational torque inspection device capable of performing:
• a press-fitting step of press-fitting the inner ring into the small-diameter step portion of the hub ring to a position where the inner ring abuts on the hub ring in the axial direction;
• a post-press-fitting rotational torque measurement step of measuring post-press-fitting rotational torque of the bearing device for a vehicle wheel when the inner member and the outer member are relatively rotated after the press-fitting step;
• and
• a post-press-fitting rotational torque determination step of determining appropriateness or inappropriateness of the post-press-fitting rotational torque depending on whether or not the post-press-fitting rotational torque measured in the post-press-fitting rotational torque measurement step falls within a range of a reference value.

A rotational torque inspection device for a bearing device for a vehicle wheel including:

• an outer member having a plurality of rows of outer raceway surfaces on an inner periphery;
• an inner member including a hub ring having a small-diameter step portion extending in an axial direction on an outer periphery and an inner ring press-fitted into the small-diameter step portion of the hub ring, the inner member having a plurality of rows of inner raceway surfaces facing the plurality of rows of outer raceway surfaces;
• and
• a plurality of rows of rolling bodies rollably accommodated between both raceway surfaces of the outer member and the inner member, the rotational torque inspection device capable of performing:
• a crimping step of crimping an inner-side end portion of the small-diameter step portion into which the inner ring is press-fitted to the inner ring;
• a post-crimping rotational torque measurement step of measuring post-crimping rotational torque of the bearing device for a vehicle wheel when the inner member and the outer member are relatively rotated after the crimping step;
• and
• a post-crimping rotational torque determination step of determining appropriateness or inappropriateness of the post-crimping rotational torque depending on whether or not the post-crimping rotational torque measured in the post-crimping rotational torque measurement step falls within a range of a reference value.