A rotor includes a first rotating body and a second rotating body. The first rotating body includes a first rotor core, first magnets arranged in a circumferential direction, and first outer side surfaces arranged in the circumferential direction. Each of the first outer side surfaces is an outer side surface of the first magnet or an outer side surface of the first rotor core, and includes a first circular arc surface curved in a circular arc shape with a first curvature radius and arranged on one side in the circumferential direction and a second circular arc surface curved in a circular arc shape with a second curvature radius and arranged on the other side in the circumferential direction. The second rotating body is the same as the first rotating body, and a second outer side surface is an outer side surface of a second magnet or an outer side surface of a second rotor core, and includes a third circular arc surface curved in a circular arc shape with a third curvature radius and arranged on one side in the circumferential direction and a fourth circular arc surface curved in a circular arc shape with a fourth curvature radius and arranged on the other side in the circumferential direction.

A spindle motor includes a base plate to which a shaft is fixed, an annular stator core that is fixed to the base plate and is wound with a plurality of stator coils, and a rotor member that is attached in a rotatable state to the shaft and includes an inner sleeve portion facing an inner peripheral side of the stator core with an inner clearance and an outer sleeve portion facing an outer peripheral side of the stator core with an outer clearance, an annular groove is formed on an outer periphery of the inner sleeve portion, and the annular groove overlaps with the plurality of stator coils as viewed from a direction perpendicular to the shaft.

An electromechanical spindle drive includes a housing, a motor, a rotational part in the form of a spindle nut, the rotational part being rotated by the motor about a rotational axis, a spindle which interacts with the rotational part, the threaded section of which is arranged within the rotational part and which exits the rotational part at a spindle outlet end, and bearings by means of which the rotational part is rotatably mounted relative to the housing, wherein at least one, preferably at least two of the bearings, are arranged in the region of the spindle outlet end of the rotational part and/or are designed in the form of a radial bearing.

The present invention relates to a motor including a motor housing, a stator installed in the motor housing and including a stator core including a plurality of unit stator cores having teeth protruding from a head unit, an insulator, and a coil, a rotor rotatably installed at a center of the stator and including a through hole formed at a center thereof and a magnet module, and a bracket disposed at an upper portion of the motor housing and including a bearing supporting a rotating shaft and a bearing seating unit, wherein the bearing seating unit includes a lateral supporting part supporting a side surface of the bearing and a lower supporting part perpendicularly protruding from the lateral supporting part so that the bearing is seated, and noise reducing groove units are provided on a surface of the lower supporting part.

A wheel hub motor is disclosed herein for installation in a wheel of a vehicle. It comprises a ring-shaped casing having a first end and a second end, a stator unit disposed in the ring-shaped casing and having a stator base and a stator ring disposed on the stator base, a rotor unit disposed in the ring-shaped casing and having a rotor base connected at the second end of the ring-shaped casing and plural permanent magnetic sheets disposed on the rotor base for corresponding to the stator ring, a shell cover connected at the first end of the ring-shaped casing, and a major axis for connecting a car body of the vehicle.

Provided is a motor capable of more reliably preventing dust generated therein from flowing to the outside. A motor includes a stator, a rotor, a rotor housing which rotates along with the rotor, a stator housing which fixes the stator thereto, includes spaces formed with respect to the rotor housing, and overlaps the rotor housing with first gaps interposed therebetween in the entire circumferential direction, annular members which overlap the stator housing with second gaps interposed therebetween in the entire circumferential direction inside the spaces, exhaust holes which suck and discharge air inside the spaces through the second gaps, and exhaust grooves.

A method for manufacturing a housing for an electrical machine includes printing, by a three-dimensional (3D) printing process, the housing. In addition, the method includes printing, by the 3D printing process, a cooling jacket that is integral with the housing. The method also includes printing, by the 3D printing process, at least one end cap configured to enclose a cavity defined by the housing. In addition, the method includes coupling the at least one end cap to the housing.

An electric motor includes a conductive shaft extending along an axis of rotation and passing through a back yoke to be fixed to one of a stator and a rotor. At least one bearing includes a conductive inner ring fixed to the shaft and a conductive outer ring rotatably coupled to the inner ring. A conductive bearing housing extends so as not to be located in a first area at one side with respect to the stator along an axial direction extending along the axis of rotation but to be located in a second area at the opposite side along the axis direction. The bearing housing is fixed to the outer ring of the bearing and to the other of the stator and the rotor. An electric motor is configured to be oppositely spaced from a plate electrically grounded in the axial direction.

A motor-transmission arrangement for an adjusting device for adjusting two components adjustable relative to each other can include a planetary gear system having a planetary carrier, a planetary gear with planetary gear toothing and which is rotatably mounted in the planetary carrier and with a ring gear with an internal toothing which engages with the planetary gear toothing. An electric motor can have a motor shaft which can be rotated about a motor shaft axis, which shaft interacts with the planetary gear system, and a housing which is closed with first and second housing covers in which the motor shaft is mounted viaa first bearing section and a second bearing section.

An axle assembly and a method of manufacture. The axle assembly may include a differential carrier and a bearing support wall. The differential carrier may be made of a first material. The bearing support wall may be mounted to the differential carrier and may be made of a second material. The second material may have a greater stiffness than the first material.