Tolerance ring

A tolerance ring disposed between a shaft member and an outer peripheral member enclosing the shaft member in a circumferential direction, comprising:

• a ring body having a spring property and a cylindrical shape;
• an abutment joint portion defined between circumferential end edges of the ring body;
• a plurality of protrusions protruding radially from the ring body, each of the plurality of protrusions having a reaction force vector due to radial rigidity, wherein the plurality of protrusions includes a plurality of circumferentially-alternating small and large protrusions;
• an abutment joint semi-circumferential region that includes the abutment joint portion at its center;
• an opposing semi-circumferential region including an opposing portion at its center, the opposing portion facing the abutment joint portion in a radial direction;
• and
• first and second X-direction semi-circumferential regions separated by a straight line connecting the abutment joint portion and the opposing portion,
• wherein a Z-direction is a direction along an axis center of the ring body, a Y-direction is a direction passing through the axis center of the ring body and the abutment joint portion, and an X-direction is a direction orthogonal to the Y-direction and the Z-direction,
• wherein a sum of X-direction components of the reaction force vector in the first X-direction semi-circumferential region is equal to or smaller than a sum of Y-direction components of the reaction force vector in the abutment joint semi-circumferential region, when each of the reaction force vector of each protrusion is decomposed into an X-direction component and a Y-direction component,
• wherein the plurality of small protrusions includes a first small protrusion and a second small protrusion,
• wherein the first small protrusion, a first interval, a large protrusion of the plurality of large protrusions, a second interval, and the second small protrusion are formed in the first X-direction semi-circumferential region in order from the end edge and along in the circumferential direction,
• wherein the large protrusion is longer in circumferential width than the first small protrusion and the second small protrusion,
• wherein the first interval is shorter in circumferential width than the second interval, and
• wherein a third interval between the second small protrusion and the opposing portion facing the abutment joint portion is shorter in circumferential width than the first interval.