A threaded fastener actuator that includes a worm-gear used to transfer rotational power to an impeller gear. The impeller gear includes a polygonal channel for receiving an actuator feature included in a threaded fastener. As the worm-gear is rotated, the impeller gear rotates about a vertical movement axis, which causes the threaded fastener contained in polygonal channel to also rotate and engage with a corresponding threaded coupler.

A worm (40) according to an embodiment is a worm made of resin and formed by injection molding. The worm includes a gear portion (40a), a cavity (40c) having an axis being a longitudinal axis (40d) of the worm being formed at the gear portion, and a top portion (40b) formed at a first end portion of the gear portion in a direction of the longitudinal axis. A plurality of recesses (40e) including a hole portion communicating with the cavity are formed at the top portion in a radial direction, and are located on an outer peripheral portion side of the gear portion with respect to the cavity.

A steering system for a motor vehicle has a worm gear set, comprising a worm wheel and a worm shaft, wherein the worm shaft is rotatably mounted at least one bearing point in a housing of the worm gear set by means of a pivot bearing. The pivot bearing has an increased load capacity compared to a pivot bearing with a single-row standard deep groove ball bearing. A pivot bearing for a steering system has an inner ring and an outer ring, wherein a plurality of rolling elements is arranged between the inner ring and the outer ring. One of the bearing rings is designed as a full ring and the other bearing ring as a split bearing ring, the split bearing ring having a first ring element and a second ring element.

A reducer of an electric power-assisted steering apparatus includes: a second shaft that is gear-coupled to a worm wheel by a worm disposed on an outer circumference of the second shaft and is connected to a first shaft driven by a motor through a power transfer member; a bearing coupled to an inside of a gear housing so as to support rotation of the second shaft; and a ring-shaped fixing member that is coupled to the second shaft and supported by one side of the bearing, and provides support between the second shaft and the bearing, thereby preventing the second shaft from escaping from the power transfer member.

A transmission device includes an external transmission device, an internal transmission device, and a spacer ring. The external transmission device is cylindrical and has an outer wall and an inner wall. The inner wall has a plurality of inwardly extending arc-shaped protrusions. The internal transmission device is disposed in the inner wall and has an outer circumferential surface including a plurality of outwardly extending arc-shaped protrusions. The spacer ring is located between and contacts the arc-shaped protrusions of the external transmission device and the arc-shaped protrusions of the internal transmission device. When torque between the external transmission device and the internal transmission device is greater than a predetermined torque, one or more of the arc-shaped protrusions of the external transmission device or the arc-shaped protrusions of the internal transmission device deform and the external transmission device rotationally slips relative to the internal transmission device.

The present disclosure relates to a bearing arrangement for supporting a shaft, in particular a shaft of a gearing mechanism for an electromechanical brake booster, having: at least one bearing, a shaft, which is at least section-wise accommodated in the at least one bearing and has a protruding, rounded region on at least one of its axial end surfaces, at least one spring element, that engages the protruding, rounded region in order to prestress the shaft in the axial direction.

A gearbox assembly for power take off from an electric motor of an electric power assisted steering apparatus comprising a gearbox housing which houses a worm shaft and a gear wheel, is disclosed. The worm shaft incorporates one or more external helical worm teeth. A main bearing assembly supports the worm shaft at an end closest to the motor. A tail bearing assembly supports the worm shaft at an end furthest from the motor, in which at least the tail bearing assembly is free to move relative to the housing through a limited range of motion that enables the worm shaft to move radially away from the axis of the wheel gear. The gearbox assembly further comprises a flexible coupler which connects the worm shaft at the main bearing end to a power take off from the motor so as to transfer torque from the motor to the worm shaft. The flexible coupler comprises a first hub part providing a connection to the worm shaft, a second hub part providing a connection to the power take off from the motor, and a flexible membrane that connects the first hub part to the second hub part. The flexible membrane provides a primary path for the transfer of torque from the first hub part to the second hub part.

A solar tracker includes a main beam and at least one slewing reducer, one of the slewing reducer is connected to a motor, the motor is controlled by a motor controller, and the motor controller is connected to the motor by a cable; the slewing reducer that is connected to the motor is a driving slewing reducer, and the other slewing reducers are driven slewing reducers, the torque of the driving slewing reducer is transmitted to the driven slewing reducers through a transmission shaft, and the driving slewing reducer and the driven slewing reducers rotate synchronously to drive the main beam to rotate; the main beam is provided through the interior of the slewing reducer.

A gear device includes a housing, a cover, and a gear. The cover covers an opening of the housing. The gear is accommodated in the housing. One of the housing and the cover includes a projection projected toward the gear and having a center axis that extends along a rotation axis of the gear. The gear includes a recess that receives the projection.

A gear box includes a motor, a worm pivotally supported by a shaft of the motor, a gear being formed at the worm, and a helical gear configured to mesh with the gear of the worm. A transfer coefficient of the helical gear with respect to a standard gear is x, an addendum coefficient of the helical gear is k, x satisfies −0.4<x<−0.1, and k satisfies 0.1<k<0.4.