Abstract: A cooling structure for an in-wheel motor includes an in-wheel motor mounted within a wheel of a vehicle to drive the wheel or to be driven by the wheel, and an oil channel and a fin serving as “heat radiating portions” to facilitate cooling of the in-wheel motor. The in-wheel motor has a case serving as a “housing”. The “heat radiating portion” is located apart from the case.

Abstract: An electrically driven wheel includes a wheel disc and a wheel hub; an in-wheel motor mounted within the wheel disc to drive the wheel disc and the wheel hub or to be driven by the wheel disc and the wheel hub; a brake rotor and a brake caliper suppressing rotation of the wheel disc and the wheel hub while a vehicle is moving; and a parking lock mechanism provided in the in-wheel motor separately from a brake mechanism formed of the brake rotor and the brake caliper. The parking lock mechanism is a band-type brake frictionally engaging a planetary carrier serving as an “output portion” of a “reduction mechanism”.

Abstract: A wheel support device (200) includes a spring (302, 304) fitted to an in-wheel motor (70) and damping the vibration of a motor-driven wheel (100) and the in-wheel motor (70) by extending and retracting, a knuckle (180) attached to the spring (302, 304) and rotatably supporting the motor-driven wheel (100), a center part (306) of a dynamic mass damper mechanism (300) vibrating together with the in-wheel motor (70) by a force given from a road surface when a vehicle runs, an upper part (310) thereof restricting the vibration of the in-wheel motor (70) by coming into contact with the center part (306) at a prescribed region, and a cushioning member (322, 324) fitted to a portion of the center part (306) or the upper part (310) corresponding to the prescribed region brought into contact with the other.

Abstract: A wheel supporting apparatus includes dampers, ball joints, a knuckle, an upper arm and a lower arm. The dampers are attached to a case of an in-wheel motor in the top-bottom direction of the vehicle's body and are connected respectively to the ball joints. The upper arm and the lower arm have respective one-ends connected to respective dampers via the ball joints and respective other ends pivotably fixed to the vehicle's body. The knuckle is connected to the ball joints to rotatably support a wheel hub via hub bearings.

Abstract: A cooling structure for an in-wheel motor includes an in-wheel motor mounted within a wheel of a vehicle to drive the wheel or to be driven by the wheel, and an oil channel and a fin serving as “heat radiating portions” to facilitate cooling of the in-wheel motor. The in-wheel motor has a case serving as a “housing”. The “heat radiating portion” is located apart from the case.

Abstract: An electrically driven wheel includes a wheel disc and a wheel hub; an in-wheel motor mounted within the wheel disc to drive the wheel disc and the wheel hub or to be driven by the wheel disc and the wheel hub; a brake rotor and a brake caliper suppressing rotation of the wheel disc and the wheel hub while a vehicle is moving; and a parking lock mechanism provided in the in-wheel motor separately from a brake mechanism formed of the brake rotor and the brake caliper. The parking lock mechanism is a band-type brake frictionally engaging a planetary carrier serving as an “output portion” of a “reduction mechanism”.

Abstract: A wheel support device (200) includes a spring (302, 304) fitted to an in-wheel motor (70) and damping the vibration of a motor-driven wheel (100) and the in-wheel motor (70) by extending and retracting, a knuckle (180) attached to the spring (302, 304) and rotatably supporting the motor-driven wheel (100), a center part (306) of a dynamic mass damper mechanism (300) vibrating together with the in-wheel motor (70) by a force given from a road surface when a vehicle runs, an upper part (310) thereof restricting the vibration of the in-wheel motor (70) by coming into contact with the center part (306) at a prescribed region, and a cushioning member (322, 324) fitted to a portion of the center part (306) or the upper part (310) corresponding to the prescribed region brought into contact with the other.

Abstract: A wheel supporting apparatus includes dampers, ball joints, a knuckle, an upper arm and a lower arm. The dampers are attached to a case of an in-wheel motor in the top-bottom direction of the vehicle's body and are connected respectively to the ball joints. The upper arm and the lower arm have respective one-ends connected to respective dampers via the ball joints and respective other ends pivotably fixed to the vehicle's body. The knuckle is connected to the ball joints to rotatably support a wheel hub via hub bearings.

Abstract: A stator includes a cylindrical-shaped stator core including multiple teeth projecting in a radial direction of the stator core, multiple coils wound around each of the multiple teeth, multiple bus rings arranged at an axially end portion of the stator core and each electrically connected to each of the multiple coils, multiple wire pulled-out portions formed on both ends of the coil and pulled out towards the bus ring, and multiple connection terminal portions integrally formed on the respective bus rings in such a manner that the connection terminal portions are arranged at respective predetermined intervals in a peripheral direction of the stator core and each extending towards each wire pulled-out portion. A tip end portion of the connection terminal portion is bent so as to form a substantially U-shape for pinching the wire pulled-out portion.

Abstract: A frame for an electric motor is provided with a high heat discharge efficiency at low manufacturing cost wherein a plurality of cooling media paths, grooves, groove paths, media paths and communication paths are formed on the frame using a diecast process. A plurality of fins are formed in the grooves and a plurality of cooling media guide members are secured about the periphery of the frame to control the flow of the cooling media.

Abstract: A frame for an electric motor is provided with a high heat discharge efficiency at low manufacturing cost wherein a plurality of cooling media paths, grooves, groove paths, media paths and communication paths are formed on the frame using a diecast process. A plurality of fins are formed in the grooves and a plurality of cooling media guide members are secured about the periphery of the frame to control the flow of the cooling media.

Abstract: A trochoidal oil pump including a housing defining an internal space; an outer rotor fitted rotatably in the internal space of the housing and having internal teeth; an inner rotor having outer teeth meshing with the internal teeth of the outer rotor to define a sealed space therebetween; and suction and discharge chambers formed in the housing and opened into the internal space of the same. The discharge member is formed to begin at an angle l formed in the direction of forward rotation from the dedendum to the beginning portion of the discharge chamber extending in the direction of forward rotation and defined by the following relationship:l.sub.1 <l.ltoreq.70.degree.,where l.sub.1, designates an angle taken in the direction of rotation from the dedendum of the inner rotor to the contact position, in which the outer rotor and the inner rotor have their addendums contacting at first, at the maximum volume of the sealed space.

Abstract: A water pump having a pump impeller and a cup-like disk disposed to be movable along a rotation shaft driven by the engine, a space for passing water being formed between the pump impeller and the cup-like disk, the pump impeller and the cup-like disk being engaged each other by the engagement of vanes and grooves formed at least one side of them respectively, the distance between the pump impeller and the cup-like disk being varied according to the change of water temperature or the change of rotation speed of the engine, thereby to make it possible to adjust the water flow rate of the pump.