The present application discloses a motor mechanical limiting device for limiting rotation of a motor. The device includes: a limiting ring, a first limiting device, and a second limiting device. The first limiting device is fixedly connected on a rotor of motor. The second limiting device is fixed on a motor stator. The limiting ring is in bearing connection with the rotor of motor. The limiting ring protrudes to form a stopping edge. Both the first limiting device and the second limiting device are located on a circumferential rotation path of the stopping edge, and the second limiting device is provided with a region for the first limiting device to pass through.

An electrical machine includes a stator with a stator body supporting an electrical stator and a rotor. The rotor is supported by a bearing having a radial bearing section forming a radial gas bearing and an axial bearing section forming an axial gas bearing, the stator side parts of these bearing sections being a stator side radial bearing part and a stator side axial bearing part that are rigidly connected to one another and together form a stator bearing structure. The stator bearing structure is mounted to the other parts of the stator by either the stator side radial or axial bearing part being rigidly mounted to these other parts, and the other bearing part are connected to these other parts by an elastic support or not at all.

The disclosure provides a power head and an outdoor power equipment using the same. The power head includes a housing assembly, a motor assembly and a battery pack assembly. The housing assembly includes a first housing and a second housing. The first housing and the second housing defines a housing space. The motor assembly is arranged in the housing space. The motor assembly includes a motor. One end of an output shaft of the motor extends to outside of the housing assembly. The battery pack assembly is arranged inside the housing space. The battery pack assembly supplies power for the motor assembly.

Disclosed is a galvanometer motor apparatus. The galvanometer motor apparatus includes a housing, a stator assembly, and a rotor assembly, wherein the rotor assembly includes an axle and a magnet that are coaxially arranged, and the stator assembly includes a frame and a single electromagnetic coil wound on the frame; wherein a first through hole configured to allow the magnet to rotatably run through is molded on the frame, the electromagnetic coil is disposed on a side of the first through hole, the electromagnetic coil is excitable to generate a drive magnetic field to magnetize the frame to supply a torque to the magnet, a recess configured to receive the stator assembly is molded in the housing. With such configurations, structure design is optimized, assembling is simpler, and efficiency is higher.

A power tool includes a housing having a rear wall, a motor assembly coupled to the rear wall, and a plurality of mounting legs projecting from the rear wall toward the motor assembly. The motor assembly defines a motor axis, and includes a stator assembly defining a plurality of axially extending mounting apertures. Each mounting leg defines a threaded boss corresponding to a respective mounting aperture of the stator assembly, and each threaded boss is configured to receive a threaded fastener. The mounting legs are angularly spaced at unequal intervals about the motor axis.

A steering mechanism for simulating a haptic feedback steering sensation includes a steering shaft connected to a steering wheel. An angle measuring device is arranged on the steering shaft and measures a rotation angle that is prevailing at the steering wheel the steering mechanism further includes an electric motor arranged in a coaxial manner with respect to the steering shaft. The electric motor is configured to apply a torque to the steering shaft. The direction of rotation of the torque applied by the electric motor is usually oriented in the opposite direction to the direction of rotation of the rotation angle that is prevailing at the steering wheel. Furthermore, the magnitude of the torque is dependent upon the value of the rotation angle and upon the vehicle model that is used as a basis. The electric motor is connected to the steering shaft via a torsionally elastic coupling.

An electrical machine, in particular an electronically commutated machine, includes a housing and a controller accommodated in the housing. The controller is configured to drive the machine to generate a magnetic rotating field. The housing has a housing cup, which surrounds a hollow space, and a housing cover. The machine has an end plate accommodated in the housing cup. The end plate is thermally conductively connected to the housing cup. The machine also has a cooling panel thermally conductively connected to the housing cup and to at least one component, or to a plurality of components, of the control unit. The machine has an inverter comprising semiconductor switches. The semiconductor switches are thermally conductively connected to the end plate. The end plate and the cooling panel enclose a portion of the hollow space.

A fan motor includes: a housing, a rotation shaft oriented across an inner center of the housing, an impeller located at a first side of the rotation shaft, a rotor connected to the rotation shaft and spaced apart from the impeller in an axial direction, a stator that surrounds the rotor, a first bearing located at a first end of the rotation shaft, a second bearing that is located at a second end of the rotation shaft and that is configured to rotatably support the rotation shaft, and a first bearing housing that accommodates and supports the first bearing, that is fixed inside the housing, and that is configured to guide a flow of air introduced into the housing.

This motor includes a yoke, an armature, a brush holder and a ground member. The yoke has the shape of a bottomed cylinder that has an inner surface to which a magnet is affixed. The armature is contained within the yoke. The brush holder is arranged in an opening of the yoke, and holds a feed brush for supplying an electric current to the armature, and a bearing that axially supports a rotary shaft of the armature. The ground member is in contact with the bearing and the yoke. The ground member is affixed to a ground terminal that is held by the brush holder.

An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole has a triangular or polygonal shape, and a radius of an inscribed circle of the triangular or polygonal shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.