摘要:
An electric actuator (13) comprises a housing (7) which contains a screw mechanism (11) and an electric motor (5) which is driveably connected to the screw mechanism which provides a linear movement in response to a rotational movement of the electric motor (5), said screw mechanism (11) comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (17) by means of an angular contact ball bearing (31), said angular contact ball bearing (31) comprising two pairs of contact points the working lines (40,41) of which intersect each other. One pair of contact points has a working line (41), the angle of which with respect to the axis (42) of the bearing (21) is smaller than the corresponding angle of the other working (40) line.
摘要:
An actuator comprises a housing, a motor (5), an actuating member (11, 12) and a screw mechanism (2) providing a linear movement of the actuating member (11, 12) with respect to the housing in response to a rotational movement of the motor (5), which screw mechanism (2) comprises a screw (17, 47) and a nut (13, 46) one of which is rotatably supported with respect to the housing by means of an angular contact bearing, and a reduction gear means (4). The actuating member (11, 12) and the reduction gear means (4) are situated at opposite ends of the screw mechanism (2).
摘要:
An actuator for use in a brake caliper is situated at opposite ends of a screw mechanism. A reduction gear mechanism is located at a distance from the actuating member. The reduction gear mechanism is included in a reduction gear module and a screw mechanism is contained in a screw mechanism module, which are interconnected through a drive module. The drive module may be located at the end of the reduction gear module facing away from the screw mechanism module. The modules may be axially aligned or at least two modules may be axially shifted or eccentric with respect to each other. The screw mechanism module may comprise an angular contact bearing which may be supported in a housing in different ways. The reduction gear module may be part of a planetary gear system.
摘要:
An electric actuator (1) comprises a housing (2) which contains a screw mechanism (3) and an electric motor (4) which is driveably connected to the screw mechanism (3), said screw mechanism (3) providing a linear movement in a rotational movement of the electric motor (4) and comprising a screw (17) and a nut (18), one of which is supported with respect to the housing (2), a sensor (28) being provided for measuring a quantity related to the rotational movement and/or the linear movement of the screw mechanism (3). A control unit (29) for monitoring and/or influencing the rotational and/or the linear movement of the screw mechanism (3) on the basis of signals from the sensor (28) has been provided.
摘要:
An actuator (7) comprises a housing (8) which contains a screw mechanism (9) and a motor (10) which is drivably connected to the screw mechanism (9), said screw mechanism (9) providing a linear movement in response to a rotational movement of the motor (10), and comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (8) by means of a rolling element bearing (25, 62). Support means (22, 61) have been provided which extend axially with respect to the screw mechanism (9), said support means (22, 61) engaging the housing (8), and supporting the screw mechanism (9) so as to take up the axial loads exerted on said screw mechanism (9).
摘要:
An actuator comprises a housing (8) which contains a screw mechanism (9) and a motor (10) which is drivably connected to the screw mechanism (9), said screw mechanism providing a linear movement in response to a rotational movement of the motor, and comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (8). The linearly displaceable member of the screw mechanism is drivingly connected to a pump mechanism for providing a flow of medium.
摘要:
An electric actuator (13) comprises a housing (17) which contains a screw mechanism (11) and an electric motor (5) which is driveably connected to the screw mechanism (11) which provides a linear movement in response to a rotational movement of the electric motor (5), said screw mechanism (11) comprising a screw (12) and a nut (33) one of which is supported rotatably with respect to the housing (7) by means of an angular contact ball bearing (31), said screw (12) by means of an intermediate coupling element (18) engaging an actuating member (16) for transferring axial forces. The intermediate coupling element (18) engages the screw (12) by means of an axial connection (53, 54) which allows radial movements.
摘要:
Bearing assembly for a vehicle hub comprising two coaxial rolling bearings having inner races and outer races, the outer races being accommodated in a common outer bush, which outer bush is provided with a flange and hub for fixing a vehicle component thereto, the inner races being accommodated on a common central element, the rolling bearings being supported on the central element and the outer bush under initial load in the axial direction.
摘要:
A pulley set for a continuously variable transmission unit, comprises a pair of discs accommodated on a shaft, and a screw mechanism which is concentric with respect to said discs and for moving the discs towards and from each other, said discs enclosing a V-shaped groove, for accommodating a belt, said screw mechanism being controllable by a control means. The control means including a motor unit, said motor unit comprising a stator and a rotor, one of said stator and rotor engaging the nut of the screw mechanism, and the other of said stator and rotor engaging the screw of the screw mechanism.
摘要:
An actuator including a housing accommodating a screw mechanism and a drive including a motor. The screw mechanism includes a nut and a screw, one of which is rotatably supported with respect to the housing. Upon relative rotation of the nut and the screw, linear movement of one of the nut and the screw is obtained. At least a rotatable component of the drive, for example, the rotor of the motor, is rotatably supported on the screw which is rotatably supported with respect to the housing.