An electromotive drive being a commutator motor has a motor shaft being rotatably mounted on axially opposite sides in shaft bearings which are each covered by an end plate. A damping system for damping sound is arranged on that bearing side, which is averted from the end plate, of at least one of the shaft bearings. The damping system has an annular sealing disk and an annular sliding disk with an integrated spring element.

A liquid pump/motor combination powered by an electric motor, preferably, an oil pump or reducing-agent pump with an electric motor, a positive displacement pump and a bearing shield arranged between the electric motor and the positive displacement pump. The liquid pump/motor combination comprises a positive displacement pump; an electric motor; and a bearing shield having a contact face, the bearing shield arranged between the electric motor and the positive displacement pump. A spherical bearing is accommodated in the bearing shield, the spherical bearing, under application of a force, being able to swivel to a limited extent. A connecting shaft is accommodated in the spherical bearing. The connecting shaft is positioned between the electric motor and the pump. An annular bearing gap, filled with liquid, is between the inside diameter of the spherical bearing and the connecting shaft. The arrangement functions as a hydrodynamic sliding bearing.

This model comprises a bearing fastening ring used in rotating electrical machines, which is able to receive, using the same component, bearings of several diameters when the ring is positioned over the shaft; furthermore, it also allows fastening of a grounding ring.

A ventilation fan includes a shaft assembly, a rotor, a motor housing, and a bearing housing. The shaft assembly defines a first port and a second port. The rotor has a rotor first portion disposed about a first portion of the shaft assembly and a rotor second portion that extends from the rotor first portion. The rotor first portion defines a rotor port. The motor housing is disposed about a second portion of the shaft assembly. The motor housing defines a housing port. The bearing housing is operatively connected to the motor housing. The bearing housing is disposed about a third portion of the shaft assembly.

A wet-running centrifugal pump includes an electric motor (1) and a centrifugal pump (7) which is driven thereby. The electric motor (1) has a rotor (4) which is rotatably arranged within the stator (3). A canned pot (13), which carries a motor-side bearing for the rotor (4), is provided between the rotor and the stator. Moreover, a bearing plate (19) is provided, which carries a pump-side bearing for the rotor (4), wherein the bearing plate (19) is fixed on the housing side, and in the region of the pump-side bearing immerses into the canned pot. A radial seal (20) is provided between the bearing plate (19) and the canned pot (13).

A fan bearing cup connection structure includes a bearing cup, a bottom board and a connection member. The bearing cup has a receiving space, a connected section and a shaft hole. The shaft hole is formed at a top end of the bearing cup in communication with the receiving space. The connected section is disposed on outer circumference of the other end of the bearing cup opposite to the shaft hole. The bottom board has an opening. The connected section of the bearing cup is disposed in the opening. The connection member is connected between the bearing cup and the bottom board by means of injection molding. By means of the connection member, the bearing cup and the bottom board can be more securely connected with each other to greatly enhance the concentricity of the bearing cup and the bottom board.

A linear actuator includes a first tube and a second tube inserted into the first tube to be free to slide. The first tube includes an outer tube and a cap provided detachably on an end portion of the outer tube, while the second tube includes a base portion and an inner tube provided detachably on the base portion and inserted into the outer tube to be free to slide. A first sliding member that slides against an outer periphery of the inner tube is provided on an inner periphery of one end of the outer tube. A second sliding member that slides against an inner periphery of the outer tube is provided on an outer periphery of an end portion of the inner tube corresponding to the other end of the outer tube.

An outer rotor brushless motor includes: a shaft; a rotor; a stator; a tubular bushing at one side of the stator; an impregnated bearing at the other side of the bushing; and a washer rotatable integrally with the shaft. The bushing has: a fixed portion fixed to a core inner peripheral surface, the fixed portion having a first end surface facing a bearing end surface, and a first inner peripheral surface facing an outer peripheral surface with first clearance in between; and a housing having a second inner peripheral surface with a greater diameter than the first inner peripheral surface, on the one side of the fixed portion. An oil repellent finish is applied to a surface of the bushing. The washer is placed radially inward of the second inner peripheral surface. Second clearance greater than the first clearance is between the bearing end surface and the first end surface.

Provided is a brushless direct current (BLDC) motor applied to a fuel pump for a motor vehicle, and more particularly, a BLDC motor of a fuel pump for a motor vehicle in which an end of a shaft of a rotor is coupled to a stator side to be rotated such that a length of the shaft is reduced.

A stepping motor includes a rotor having a rotor magnet fixed to a rotating shaft, a plurality of coil bobbins where coils are wound, a stator yoke group having a plurality of stator yokes each of which surrounds each of the plurality of coil bobbins in an axial direction and a radial direction of the rotating shaft, and the plurality of stator yokes each having pole teeth alternately arranged in a circumferential direction around the rotating shaft so as to be opposed to a side surface of the rotor magnet, and a magnetic attractive force generating member configured to attract the rotor magnet to the axial direction of the rotating shaft by a magnetic attractive force, and a magnetic center of the rotor magnet and a magnetic center of the stator yoke group coincide with each other.