This hollow shaft member 10 includes paired diameter-reduced sections 11 respectively formed at both shaft ends of a hollow shaft-like tubular material by performing swaging processing on both the shaft ends, and an intermediate section 12 located between the paired diameter-reduced sections, and having an outer diameter larger than an outer diameter of the paired diameter-reduced sections. Shapes of connection boundaries between the intermediate section 12 and the diameter-reduced sections 11 are formed as perpendicular step-shaped sections 13 stepped substantially perpendicular to an axial direction, and the perpendicular step-shaped sections 13 are formed by the swaging processing. With such a configuration, a hollow shaft member for a rolling device in which a weight reduction has been achieved can be provided.

A linear transmission device suitable for mounting of at least one electronic component includes: an elongated shaft member; a movable member sleeved onto the elongated shaft member and having an end surface; a housing unit disposed on the end surface and includes: a base member, at least one accommodating member and a housing member. The base member is disposed on the elongated shaft member, and includes: an assembling surface and a plurality of assembling portions. The accommodating member is disposed on the base member and includes: a first engaging surface, a second engaging surface, and an accommodating groove for accommodating the electronic component. The first engaging surface has plural connecting portions for combining with the assembling portions. The second engaging surface has plural engaging grooves, the housing member is sleeved on the accommodating member, and includes a plurality of engaging protrusions for engaging with the plurality of engaging grooves.

An actuator assembly comprises a static part and a movable part. A helical bearing arrangement supporting the movable part on the static part guides helical movement of the movable part with respect to the static part around a helical axis. One or more actuators, that are not shape memory alloy actuators, are arranged to drive movement of the movable part around the helical axis, which thereby includes a component of translational movement along the helical axis. The helical movement increases the force within the actuator assembly allowing actuation of heavier movable parts, and may improve posture.

The present disclosure relates to a ball spline device, an automated guided vehicle and a stereoscopic warehouse system. The ball spline device includes: a spline shaft, an outer side wall of which is provided with a raceway groove extending along an axial direction, the raceway groove includes a first groove section and a second groove section communicated along the axial direction, a width of the second groove section being greater than the width of the first groove section; a spline nut coaxially, sleeved outside the spline shaft; and a first rolling body, movably disposed in the raceway groove along the axial direction to achieve relative movement of the spline nut and the spline shaft. When the spline nut is in a first position, the first rolling body is in the first groove section, and cooperates with the first groove section in a constrained manner to cause synchronous rotation of the spline nut and the spline shaft; and when the spline nut is in a second position, the first rolling body is in the second groove section, so that there is a predetermined gap in a circumferential direction between the spline shaft and the spline nut.

A device for rotationally and translationally moving an object comprising a flat storage area relative to a storage area of a support plate arranged plane-parallel to the storage area, wherein: the object can be rotated relative to the support plate in one of two possible opposing rotational directions and can be displaced in a predefined direction; mutually facing bearing surfaces of the storage areas each have closed peripheral raceway grooves in which rolling elements are guided; the raceway grooves are formed such that, when a force is applied to the object in a direction defined in the plane of the storage area, the object can be moved, in a movement which is at least partially forcibly guided and which is simultaneously rotational and translational, from a starting position into an intermediary position, the object being rotated relative to the support plate in one of two possible opposing rotational directions and being displaced in a predefined direction; and the object, after being moved into the intermediary position, can further be rotated relative to the support plate in the one of two possible opposing rotational directions and can be displaced counter to the predefined direction, and, when rotated by 180°, resumes the base position.

A device for rotationally and translationally moving an object comprising a flat storage area relative to a storage area of a support plate arranged plane-parallel to the storage area, wherein: the object can be rotated relative to the support plate in one of two possible opposing rotational directions and can be displaced in a predefined direction; mutually facing bearing surfaces of the storage areas each have closed peripheral raceway grooves in which rolling elements are guided; the raceway grooves are formed such that, when a force is applied to the object in a direction defined in the plane of the storage area, the object can be moved, in a movement which is at least partially forcibly guided and which is simultaneously rotational and translational, from a starting position into an intermediary position, the object being rotated relative to the support plate in one of two possible opposing rotational directions and being displaced in a predefined direction; and the object, after being moved into the intermediary position, can further be rotated relative to the support plate in the one of two possible opposing rotational directions and can be displaced counter to the predefined direction, and, when rotated by 180°, resumes the base position.

A ball screw spline with reduced size and weight includes: a shaft formed in such a manner that a helical ball screw groove and a straight ball spline groove intersect each other; a ball screw nut having a helical ball screw groove facing the ball screw groove in the shaft, the ball screw nut being configured to allow recirculating a screw ball fitting in the ball screw groove in the shaft; and a ball spline outer race having a straight ball spline groove facing the ball spline groove in the shaft, the ball spline outer race being configured to allow recirculating a spline ball fitting in the ball spline groove in the shaft. The ball screw groove in the shaft is made as deep as or deeper than the ball spline groove in the shaft, and the screw ball is made smaller in diameter than the spline ball.

A ball screw spline with reduced size and weight includes: a shaft formed in such a manner that a helical ball screw groove and a straight ball spline groove intersect each other; a ball screw nut having a helical ball screw groove facing the ball screw groove in the shaft, the ball screw nut being configured to allow recirculating a screw ball fitting in the ball screw groove in the shaft; and a ball spline outer race having a straight ball spline groove facing the ball spline groove in the shaft, the ball spline outer race being configured to allow recirculating a spline ball fitting in the ball spline groove in the shaft. The ball screw groove in the shaft is made as deep as or deeper than the ball spline groove in the shaft, and the screw ball is made smaller in diameter than the spline ball.

A linear transmission device suitable for mounting of at least one electronic component includes: an elongated shaft member; a movable member sleeved onto the elongated shaft member and having an end surface; a housing unit disposed on the end surface and includes: a base member, at least one accommodating member and a housing member. The base member is disposed on the elongated shaft member, and includes: an assembling surface and a plurality of assembling portions. The accommodating member is disposed on the base member and includes: a first engaging surface, a second engaging surface, and an accommodating groove for accommodating the electronic component. The first engaging surface has plural connecting portions for combining with the assembling portions. The second engaging surface has plural engaging grooves, the housing member is sleeved on the accommodating member, and includes a plurality of engaging protrusions for engaging with the plurality of engaging grooves.

A ball screw spline with reduced size and weight includes: a shaft formed in such a manner that a helical ball screw groove and a straight ball spline groove intersect each other; a ball screw nut having a helical ball screw groove facing the ball screw groove in the shaft, the ball screw nut being configured to allow recirculating a screw ball fitting in the ball screw groove in the shaft; and a ball spline outer race having a straight ball spline groove facing the ball spline groove in the shaft, the ball spline outer race being configured to allow recirculating a spline ball fitting in the ball spline groove in the shaft. The ball screw groove in the shaft is made as deep as or deeper than the ball spline groove in the shaft, and the screw ball is made smaller in diameter than the spline ball.