The invention relates to a rotary actuator, converting actuator and method for producing rotation. The rotary actuator includes at least two rotation units for producing stepped angular displacements (Rs). The rotation unit includes a cylinder for producing linear movement (L) and a converter for converting the linear movement to rotation. The stepped rotary movements of the rotation units are transmitted by transmission elements to an output shaft.

The invention relates to a rotary actuator, converting actuator and method for producing rotation. The rotary actuator includes at least two rotation units for producing stepped angular displacements (Rs). The rotation unit includes a cylinder for producing linear movement (L) and a converter for converting the linear movement to rotation. The stepped rotary movements of the rotation units are transmitted by transmission elements to an output shaft.

The present invention relates to the field of linear actuators, and in particular, to a high-efficiency high-thrust electric linear actuator for a solar panel. Compared with a conventional electric linear actuator, in the electric linear actuator for a solar panel of the present invention, a drive nut on a screw uses a copper alloy nut. The copper alloy nut used in the present invention greatly improves the strength, toughness, and fatigue-resistance performance and has high hardness and high tensile strength. The copper alloy nut and the corresponding screw are used in combination to bear higher pressure and do not fracture easily. Therefore, a small-structure high-thrust electric linear actuator can be realized. An electric linear actuator having a smaller volume is used to support the solar panel, so that small space is occupied, and transportation and use become more convenient.

A step actuator includes a housing, a stator in the housing, a rotor including a magnet provided radially inward of the stator and a nut member inserted into the magnet and protruding through one side of the housing, a bearing rotatably supporting the nut member, a screw member coupled with the nut member to linearly move as the rotor rotates, and a mounting member supported on one side of the housing to support the screw member in such a manner that the screw member is linearly movable. The nut member includes an end portion passing through the bearing and a coupling portion extending from the end portion to couple with the bearing.

A step actuator includes a housing, a stator in the housing, a rotor including a magnet provided radially inward of the stator and a nut member inserted into the magnet and protruding through one side of the housing, a bearing rotatably supporting the nut member, a screw member coupled with the nut member to linearly move as the rotor rotates, and a mounting member supported on one side of the housing to support the screw member in such a manner that the screw member is linearly movable. The nut member includes an end portion passing through the bearing and a coupling portion extending from the end portion to couple with the bearing.

A seat and motorized stem fit device is designed for fitting a cyclist on a bicycle having a seat post and a seat, with the seat post being an original seat post provided by a seat post manufacturer. The motorized seat post fit device comprises a drive assembly and an adjustable seat assembly coupled to the drive assembly and providing an interface between the seat post and the seat. The drive assembly controls the adjustable seat assembly to provide at least one of a vertical displacement and a horizontal displacement of the seat relative to the seat post.

An adjuster mechanism includes a housing having a neck and an adjustment shaft extending from the housing. The adjustment shaft is engageable in a reflector of a headlamp. An input shaft extends through the neck of the housing and rotation thereof causes movement of the adjustment shaft. At least one lobe is situated on the input shaft so as to create a non-circular interference fit that establishes a resistance to rotation of the input shaft.

In a spindle system with a hollow spindle for a linear actuator, the linear actuator has a telescopic tube system including an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube. A bearing is arranged to transmit axial forces between the hollow spindle and the outer tube. The hollow spindle at least partially surrounds an inner shaft of the spindle system and is connected to the inner shaft of the spindle system by one or more tappets of a positive and axially displaceable shaft-hub connection. The hollow spindle has a bearing seat for the bearing and an external thread on an outer side.

In a spindle system with a hollow spindle for a linear actuator, the linear actuator has a telescopic tube system including an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube. A bearing is arranged to transmit axial forces between the hollow spindle and the outer tube. The hollow spindle at least partially surrounds an inner shaft of the spindle system and is connected to the inner shaft of the spindle system by one or more tappets of a positive and axially displaceable shaft-hub connection. The hollow spindle has a bearing seat for the bearing and an external thread on an outer side.

A pneumatic stepper motor includes a housing, said housing accommodating at least part of: a rack or geared axle comprising a plurality of gear elements; and two pistons, each comprising at least two teeth, said pistons being arranged to cooperate with said rack or geared axle. The racks may either be straight or curved. The pistons are preferably double-acting pistons. A device includes at least one, and preferably a plurality of, such pneumatic stepper motor(s). The device may in particular be an MRI-compatible robotic system, more in particular for example an MRI-guided breast biopsy device.