A bearing includes a first ring, a second ring, at least one row of axial rolling elements, and at least one row of radial rolling elements arranged between axial raceways provided on the rings. The second ring has a protruding nose engaged into an annular groove of the first ring and provided with the axial raceway of the second ring. The bearing further includes at least one thrust ring delimiting a radial raceway for the axial rolling elements, and at least one spring system to axially push the thrust ring. The thrust ring is axially disposed between the axial rolling elements and the nose. The spring system is mounted on the nose. The groove of the first ring delimits a radial raceway for the axial rolling elements.

A galvanometer drive with a rotor that is rotatable about an axis of rotation and includes a magnet, and a stator unit that surrounds the rotor and includes a coil, the rotor being supported by two bearings, at least one of which is a floating bearing, such that the rotor can perform a rotational movement relative to the stator unit about the axis of rotation. A radial movement limiting device which is adapted to limit the radial movement of the floating bearing with respect to the stator unit.

A tensioning arrangement for a bearing ring, which introduces a compressive force towards a rotational centre of the bearing ring, to prevent the bearing ring distorting as a shaft supported by the bearing turns. The tensioner arrangement includes a strap and a tensioner. The strap has a connector at each end, and tensioner has an element for connecting to the connectors. The tensioner also has an element for applying tension to the strap. In use, the strap is arranged around the bearing ring and a circumferential length of the strap in contact with the bearing ring is reduced, thereby applying compressive force to the bearing ring.

A fixing structure for an auxiliary bearing of an electric drive assembly and an electric drive assembly are disclosed. The fixing structure comprises a bearing pressing plate, a bolt, a lock nut, an auxiliary bearing outer ring and an auxiliary bearing inner ring. The bearing pressing plate is provided with a through hole, the housing is provided with a threaded hole, and the bolt passes through the through hole and is fixed in the threaded hole. The bearing pressing plate pre-tightens one side of the auxiliary bearing outer ring, and the housing limits a position of the other side of the auxiliary bearing outer ring. The lock nut is sleeved on the shaft to pre-tighten one side of the auxiliary bearing inner ring, and the gear limits a position of the other side of the auxiliary bearing inner ring. The bearing fixing solution has a simple structure; moreover, the inner and outer rings of the bearing are pre-tightened by threads, thereby avoiding over-positioning of the bearing, reducing the running noise of the bearing, and improving the service life of bearing.

An outer ring (26) for a bearing assembly includes an annular backing member (54) having a body, and an annular race member (50). The body has a first portion defining a radial inner surface (98) and a radial outer surface, and a second portion defining an axially-facing base surface (110) and a radially-facing end surface (118). The annular race member has a radial outer face (58) and a radial inner face, and a first axial end face and a second axial end face (70) that both extend between the radial outer face and the radial inner face. The annular backing member is in press-fit engagement with the annular race member such that the radial outer face of the annular race member engages the radial inner surface of the annular backing member and the second axial end face of the annular race member engages the axially-facing base surface of the annular backing member such that the members are unitized.

Provided is a bearing for a wind turbine, including a first and a second ring arranged radially to each other with one ring rotating relative to the other ring around an axis of rotation. The first ring has a cylindrical ring section and a collar extending radially from the ring section. The collar has an axial support area supporting axial bearing elements, wherein several pretension elements creating compressive stress are fixed to the first ring in the section where the collar extends from the ring section.

An apparatus for providing a load on a bearing mounted to a shaft includes an attaching member releasably connectable to the shaft. A press mechanism is coupled to the attaching member and is configured to provide a compressive load to the bearing. An optical sending unit is configured to output a high intensity light to allow a user to locate a shaft slot of the shaft to align the press mechanism relative to the shaft when the attaching member connects to the shaft.

A tensioning arrangement for a bearing ring, which introduces a compressive force towards a rotational centre of the bearing ring, to prevent the bearing ring distorting as a shaft supported by the bearing turns. The tensioner arrangement includes a strap and a tensioner. The strap has a connector at each end, and tensioner has an element for connecting to the connectors. The tensioner also has an element for applying tension to the strap. In use, the strap is arranged around the bearing ring and a circumferential length of the strap in contact with the bearing ring is reduced, thereby applying compressive force to the bearing ring.

A tensioning arrangement for a bearing ring, which introduces a compressive force towards a rotational centre of the bearing ring, to prevent the bearing ring distorting as a shaft supported by the bearing turns. The tensioner arrangement includes a strap and a tensioner. The strap has a connector at each end, and tensioner has an element for connecting to the connectors. The tensioner also has an element for applying tension to the strap. In use, the strap is arranged around the bearing ring and a circumferential length of the strap in contact with the bearing ring is reduced, thereby applying compressive force to the bearing ring.

Presented are a method and apparatus for an aircraft flight surface actuation system including a motor having an output shaft. A gearbox is coupled with the output shaft, whereby a first driving force output via the motor is converted to a second driving force. A torque shaft assembly is driveably coupled with the gearbox. The torque shaft assembly includes a first tube, a second tube located at least partially through the first tube and located coaxial therewith, wherein the first tube comprises an axial preload operable to mitigate lateral deflection, and wherein the first tube comprises a torsional preload operable to mitigate torsional deflection. In addition, the aircraft flight surface actuation system includes an eccentric cam mechanism driveably coupled with the torque shaft assembly, and a flight surface coupled with the eccentric cam mechanism.