NSK

A ball screw device testing apparatus includes a support that rotatably supports a rotation component of a ball screw device and linearly movably supports the other linear motion component, a first motor that generates a torque, and a load device that applies a load to the linear motion component. The load device includes a movable component that is disposed in a first direction with respect to the linear motion component and is movable in an axial direction and an orthogonal direction, a reaction force generation mechanism that is disposed in the first direction with respect to the movable component and presses the movable component from the first direction, and a radial load mechanism that moves the movable component in the orthogonal direction. The movable component is movable relative to the reaction force generation mechanism in the orthogonal direction. The movable component includes a coupling portion capable of transmitting a load in the second direction and the orthogonal direction to the linear motion component.

A configuration of a reverse-input blocking clutch capable of preventing a stopper member from coming off from an output member and reducing a number of parts is provided.An output member 4 has a mounting shaft portion 20 that is arranged so as to be coaxial with an output-side engaging portion 19 and protrudes toward a first side in an axial direction from an end surface on the first side in the axial direction of the output-side engaging portion 19. A stopper member 6 has a cylindrical portion 52 fitted onto the mounting shaft portion 20 of the output member 4; a flange portion 53 facing in the axial direction an end surface 49 on the first side in the axial direction of the engaging element 5; and a crimped portion 51 formed in at least a part of the cylindrical portion 52 or connected to at least a part in a circumferential direction of an end portion on the first side in the axial direction of the cylindrical portion 52, the stopper member being crimped and fixed to the mounting shaft portion 20 by the crimped portion 51.

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Provided is a ball screw device capable of holding a sufficient amount of lubricant in a circulation groove. This ball screw device includes: a screw shaft having a shaft-side spiral groove in an outer peripheral surface thereof; a nut 3 having, on an inner peripheral surface thereof, a nut-side spiral groove 7 and a roughly S-shaped circulation groove 9 connecting an end point and a start point of a spiral-shaped load path 8 configured by the shaft-side spiral groove 5 and nut-side spiral groove 7; and a plurality of balls 4 arranged on an inner side of the load path 8 and the circulation groove 9. The circulation groove 9 has, in a surface thereof, a recessed lubricant holding portion 11 for holding the lubricant.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …