An overload protection mechanism for use with an electrically hedge trimmer includes a transmission ring gear, a roller disposed in the transmission ring gear, a transmission shaft disposed in the transmission ring gear and eccentrically connected with two rocker arms, and a clutch member movably sleeved on the transmission shaft. When excessive resistance is applied to the rocker arms, the clutch member is pushed by the roller to compress an elastic member. This allows the transmission ring gear to be idled. When the resistance applied to the rocker arms is smaller than the rebound force provided by the elastic member, the clutch member is engaged with the roller, such that the transmission ring gear drives the transmission shaft to rotate through the clutch member.

Thus, the overload protection mechanism of the present invention carries out overload protection to the motor for extending the life of the motor.

A compensating coupling comprises two outer coupling parts, namely an input-side coupling part and an output-side coupling part, both of which are to be connected to rotatable elements, more particularly shafts, and a center coupling part, which can be moved to a limited extent relative to the outer coupling parts. The center coupling part is composed of: a tube piece in the form of a damping element; and two tube end pieces, which are fastened to the tube piece and which are each designed to be fitted onto one of the outer coupling parts in a centered manner by ball head centering.

A bearing including a base, a plurality of slots, and a plurality of rollers disposed in the plurality of slots. At least one of the plurality of slots may be configured to retain a first roller and a second roller of the plurality of rollers at different skewing angles. Methods for manufacturing bearings are also described. In an embodiment, a method of manufacturing a bearing includes providing a first plurality of base layers. The first plurality of base layers may include portions of a plurality of slots and portions of a plurality of cooling channels. The method may include inserting a roller in at least one of the portions of the plurality of slots and providing a second plurality of base layers.

Aerostructure actuator systems include first and second shaft portions having respective first and second mandrels and a clutch assembly arranged within the first mandrel and connecting the shaft portions. The clutch assembly includes a post with a post extension fixedly connected to the second mandrel. A first bearing is installed on the post extension to frictionally engage with a portion of the post. A second bearing is installed on the post. A spacer is arranged between the bearings and is fixedly attach to the first mandrel. A load setting nut is configured to engage with the post extension and apply a compressive force to the bearings and spacer against the post. The compressive force defines a coupling limit between the shaft portions. The clutch assembly is configured to rotationally decouple the shaft portions from each other if a relative rotational speed between the shaft portions exceeds the coupling limit.

An asymmetric torque limiter having an axis of rotation including a first annular friction disk, a second annular friction disk a skewed roller disk a first resilient member and a second resilient member. The second annular friction disk is concentrically arranged with the first annular friction disk. The skewed roller disk is in contact with the second annular friction disk. The skewed roller disk includes a plurality of skewed rollers mounted in an annular retainer. The plurality of skewed rollers are about a respective roller axis, each roller axis being skewed to a radial direction passing through the skewed roller from the axis of rotation. The first resilient member is attached to the first annular friction disk and is configured to bias the first annular friction disk toward an input shaft. The second resilient member is configured to bias the skewed roller disk toward the second annular friction disk.

An aircraft hybrid propulsion system (5) comprises an internal combustion engine (10) comprising a main drive shaft (24), an electric machine (28) comprising an electric machine rotor (78), a propulsor (12) mounted to a propulsor shaft (62), and a clutch arrangement configured to selectively couple each of the gas turbine engine main drive shaft (24) and electric machine rotor (78) to the propulsor drive shaft (62). The electric machine rotor (78) is mounted coaxially with the main drive shaft (24) and the clutch arrangement comprises a first overrunning clutch (52) configured to couple the main drive shaft (24) to the propulsor drive shaft (62), and a second overrunning clutch (54) configured to couple the electric machine rotor (78) to the propulsor drive shaft (62).

A measurement equipment configured to be connected to a measurement device and an HF coaxial connection element and a torque limiter. The torque limiter is configured for connecting the HF coaxial connection element with the measurement device with a predetermined torque. Furthermore, the invention provides an HF coaxial connection element configured to be connected to a corresponding HF coaxial connection element. The HF coaxial connection element comprises a torque limiter configured for detachably connecting the HF coaxial connection element with the corresponding HF coaxial connection element with a predetermined torque, a centering element for centering the HF coaxial connection element with respect to the corresponding HF coaxial connection element and a twist protection element for preventing twisting motion between the HF coaxial connection element and the corresponding HF coaxial connection element. A corresponding torque limiter is also provided.

The present invention provides a measurement equipment configured to be connected to a measurement device. The measurement equipment comprises an HF coaxial connection element and a torque limiter. The torque limiter is configured for connecting the HF coaxial connection element with the measurement device with a predetermined torque. Furthermore, the invention provides an HF coaxial connection element configured to be connected to a corresponding HF coaxial connection element. The HF coaxial connection element comprises a torque limiter configured for detachably connecting the HF coaxial connection element with the corresponding HF coaxial connection element with a predetermined torque. Furthermore, the HF coaxial connection element comprises a centering element for centering the HF coaxial connection element with respect to the corresponding HF coaxial connection element. The HF coaxial connection element comprises a twist protection element for preventing twisting motion between the HF coaxial connection element and the corresponding HF coaxial connection element. In addition, the invention provides a corresponding torque limiter.

An aircraft hybrid propulsion system (5) comprises an internal combustion engine (10) comprising a main drive shaft (24), an electric machine (28) comprising an electric machine rotor (78), a propulsor (12) mounted to a propulsor shaft (62), and a clutch arrangement configured to selectively couple each of the gas turbine engine main drive shaft (24) and electric machine rotor (78) to the propulsor drive shaft (62). The electric machine rotor (78) is mounted coaxially with the main drive shaft (24) and the clutch arrangement comprises a first overrunning clutch (52) configured to couple the main drive shaft (24) to the propulsor drive shaft (62), and a second overrunning clutch (54) configured to couple the electric machine rotor (78) to the propulsor drive shaft (62).

Torque limiters prevent the transmission of excessive torque between moving components of one or more gears in a tracker drive assembly. When an amount of torque between these moving components exceeds a threshold, the torque limiter may slip, thus allowing the components to move relative to each other. Embodiments disclosed herein may include a drive motor configured to rotate a drive shaft, at least one gear configured to translate rotation of the drive shaft into rotation of a PV module mounting structure, and a torque limiter interposed between an interior surface of a first component of the at least one gear and an exterior surface of a second component of the at least one gear to allow the first component to slip relative to the second component when an amount of torque between the first and second components exceeds a threshold.