A press-fit mounting peg (2) is described for retaining a component such as a stepped-motor on a circuit board (21). The mounting peg (2) is securable in a mounted position by a first axial displacement of a locking pin (17) along a pin channel (16) of the press-fit mounting peg (2) in a first axial direction along a longitudinal axis of the press-fit mounting peg (2) from a first axial position to a second axial position. The pin channel (16) comprises at least one pin displacement stop (13, 20) for stopping a second axial displacement of the locking pin (17) out of the second axial position.

The torque transmission shaft has a shaft having a hollow tubular shape and a clamp. The shaft has a connecting portion integral with the shaft at one axial end portion, a slit extending in the axial direction in a portion on the other axial end side and opens on the other side in the axial direction, and a female serration on the inner circumferential surface of the other axial end portion. The clamp is separate from the shaft and has a non-continuous portion at one location in the circumferential direction, a pair of flange portions on both sides of the non-continuous portion, and a connecting portion connecting the pair of flange portions in the circumferential direction. The clamp is externally fitted and fixed to the other axial end portion of the shaft and reduces the diameter of the other axial end side portion of the shaft.

The torque transmission shaft includes: a shaft that is integrally formed and that has a yoke provided at one end portion in the axial direction and a female serration provided on the inner peripheral surface at the other end in the axial direction; and a clamp that is separate from the shaft and that is capable of reducing the diameter of the other end portion of the shaft in the axial direction; wherein the shaft and the clamp are fixed together.

Embodiments of clamping hub are disclosed. In one embodiment, the clamping hub includes a non-circular aperture with a portion of the non-circular aperture being formed so as to be substantially flat. The clamping hub also includes a shaft securer aperture that is formed in a substantially flat wall that contributes to the substantially flat portion of the non-circular aperture.

A clamping connection includes a hollow shaft region, a shaft at least partially introduced into the hollow shaft region, a screw, and a clamping ring. The hollow shaft region has an axial slot radially extending through the hollow shaft region. The screw has a screw thread and a screw head, which is larger than the largest diameter of the screw thread. The hollow shaft region has a flattening, the screw rests at least partially against the flattening, and the screw is set apart from the shaft.

A press-fit mounting peg (2) for retaining a component such as a stepped-motor on a circuit board (21). The mounting peg (2) is securable in a mounted position by a first axial displacement of a locking pin (17) along a pin channel (16) of the press-fit mounting peg (2) in a first axial direction along a longitudinal axis of the press-fit mounting peg (2) from a first axial position to a second axial position. The pin channel (16) comprises at least one pin displacement stop (13, 20) for stopping a second axial displacement of the locking pin (17) out of the second axial position.

The torque transmission shaft includes: a shaft that is integrally formed and that has a yoke provided at one end portion in the axial direction and a female serration provided on the inner peripheral surface at the other end in the axial direction; and a clamp that is separate from the shaft and that is capable of reducing the diameter of the other end portion of the shaft in the axial direction; wherein the shaft and the clamp are fixed together.

The torque transmission shaft has a shaft having a hollow tubular shape and a clamp. The shaft has a connecting portion integral with the shaft at one axial end portion, a slit extending in the axial direction in a portion on the other axial end side and opens on the other side in the axial direction, and a female serration on the inner circumferential surface of the other axial end portion. The clamp is separate from the shaft and has a non-continuous portion at one location in the circumferential direction, a pair of flange portions on both sides of the non-continuous portion, and a connecting portion connecting the pair of flange portions in the circumferential direction. The clamp is externally fitted and fixed to the other axial end portion of the shaft and reduces the diameter of the other axial end side portion of the shaft.

A slotted-type rigid coupling is manufactured so that the internal-diameter dimension of a first shaft hole of a circumferentially divided shaft-fastening part is the same as that of a shaft. The first shaft hole is widened by widening force from a pressing mechanism provided with a fastening bolt, and the shaft is inserted through the first shaft hole up to a shaft insertion hole. The widening force is ceased, the first shaft hole is narrowed by fastening force from the pressing mechanism, and the shaft is securely fastened. When the shaft is securely fastened to the shaft-fastening part by the fastening bolt, eccentricity in the shaft is prevented or minimized.

In a yoke for a cross shaft universal joint, the forming direction of a through hole (17a) and a screw hole (18a) is inclined relative to the axes of circular holes (19a, 19a) formed in a pair of engaging arm parts (12, 12). And, by fastening a bolt (32) to thereby put first and second flange parts (14a, 15a) nearer to each other, mutually approaching forces are applied to the connecting arm parts (12, 12) in a direction inclined relative the axes of the circular holes (19a, 19a). Thus, cup bearings (29) incorporated in the circular holes (19a, 19a) are pressed against the end of a shaft part (28a) constituting a cross shaft (27), thereby enabling suppression of occurrence of shaking motion between the bearings incorporated in the circular holes and the end of the shaft part of the cross shaft supported rotatably by the bearings.