A rotary actuator has a stop module configured to mechanically link two gear stages travelling at different rotational speeds when an end-of-stroke travel limit is reached, thereby causing the rotary actuator to bind because relative motion between the gear stages is impeded.

A rotary actuator has a stop module configured to mechanically link two gear stages travelling at different rotational speeds when an end-of-stroke travel limit is reached, thereby causing the rotary actuator to bind because relative motion between the gear stages is impeded.

A speed reducer including: a first gear; an eccentric shaft joined to the first gear, the eccentric shaft has first and second supporting portions offset in a rotation radial direction with respect to a first gear rotation shaft; a fixed gear at an eccentric shaft radial direction outer side, and whose rotation is restricted; a transmitting gear supported at the first supporting portion and meshes with the fixed gear, and the transmitting gear revolves around the first gear rotation shaft and rotates around its own axis; an outputting portion rotating due to the transmitting gear revolving and rotating around its own axis; and a locking gear supported at the second supporting portion and meshes with the fixed gear, and the locking gear revolves around the first gear rotation shaft and rotates around its own axis, and rotation of the outputting portion is restricted.

Various embodiments of the teachings herein include an actuating drive comprising: a drive element; an actuation element; and a restoring spring. The drive element drives the actuation element indirectly about an actuation axis. The actuation element includes a shaft portion concentric to the actuation axis and extends at least partially circumferentially. The restoring spring includes a wound flat spring providing a restoring torque on the actuation element, acting tangentially on the shaft portion, and a free spring end tangentially fastened to the shaft portion. The free spring end is radially externally disposed with respect to the spring axis and fastened tangentially to the shaft portion. The spring is mounted rotatably so the spring axis is radially spaced apart from the actuation axis and aligned parallel to the actuation axis.

An alignment mechanism comprises a rotary unit 61 with a first rotary axis 61c, three power transmission mechanisms 62, and three alignment action units 63. Each power transmission mechanism 62 comprises a first arm 621 and a second arm 622. The first arm 621 includes a first end 621a pivotably supported at a corresponding one of three different positions P11 to P13, and a second end 621b on the opposite side of the first end 621a. The second arm 622 includes a second rotary axis 622c and is pivotably supported on the second end 621b of the first arm 621 at a position different from the second rotary axis 622c. The alignment action units 63 are connected to corresponding second arms. The second rotary axes 622c are at three positions P21 to P23 separated from the rotary unit 61 toward three different directions centered on the first rotary axis 61c.

An eccentric gear structure includes a gear block and an eccentric block embedded into the gear block; the gear block is provided with an accommodating cavity suitable for embedment of the eccentric block, the eccentric block is provided with a first through hole and a second through hole that deviates from the first through hole; an embedding hole is provided at an axis of the gear block, and an axis of the first through hole coincides with an axis of the embedding hole. The eccentric gear structure ensures the quality of the product through the embedded structure.

An eccentric gear structure includes a gear block and an eccentric block embedded into the gear block; the gear block is provided with an accommodating cavity suitable for embedment of the eccentric block, the eccentric block is provided with a first through hole and a second through hole that deviates from the first through hole; an embedding hole is provided at an axis of the gear block, and an axis of the first through hole coincides with an axis of the embedding hole. The eccentric gear structure ensures the quality of the product through the embedded structure.

The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and self-lubricating gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more planet locking gears, fixed spur gear, and output spur gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the planet locking gear which causes rotation of the output spur gear which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output spur gear causes the gear teeth on the fixed and output spur gears to lock the planet gear in place.

The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and self-lubricating gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more planet locking gears, fixed spur gear, and output spur gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the planet locking gear which causes rotation of the output spur gear which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output spur gear causes the gear teeth on the fixed and output spur gears to lock the planet gear in place.

A torque conversion device has: a second rotor having a second rotating shaft parallel to a first rotating shaft of a first rotor; link portions having first mounting portions attached to the first rotor, and second mounting portions attached to the second rotor, the link portions interposed between first rotor and second rotor; and weights mounted to the link portions and located on either side of the first mounting portions. The distance between first mounting portions and second mounting portions is equal to the distance between first rotating shaft and second rotating shaft, and the distance between first rotating shaft and first mounting portions is equal to the distance between the second rotating shaft and the second mounting portions.