A motor comprising: (a) a stator having a plurality of ferrous cores surrounded by a plurality of windings; (b) a pair of rotors positioned on opposing sides of the stator, each rotor including a ring gear; and (c) a drive shaft extending through a cutout of the stator, the drive shaft having a pinion gear positioned near an end of the drive shaft in communication with the ring gears of the rotors; wherein the rotors rotate in opposing directions so that the ring gears translate a movement of the rotors to the drive shaft through the pinion gear to rotate the drive shaft in a direction substantially orthogonal to a direction of rotation of the rotors.

There is provided a composite oil seal having an electric corrosion prevention function. The composite oil seal includes: a seal main body configured to seal an interior of a motor housing in a state of being mounted to a shaft in the motor housing; and a ground path mounted to the seal main body. The ground path is configured to electrically connect the shaft to the motor housing to allow current induced in the shaft to flow to the motor housing. ( )

The present disclosure relates to the field of outboard engines, particularly to a direct-drive electric outboard engine and an outboard engine system for alleviating the problem of the existing outboard engines, i.e., incapability of simultaneously meeting requirements on rev and torque of different types of ships. The direct-drive electric outboard engine includes an external rotor mechanism and a stator mechanism; wherein the external rotor mechanism includes an external stator and an impeller; the external rotor is located outside the stator mechanism; and the impeller is located outside the external rotor.

A motor includes a first housing having a groove, a rotor inserted into the groove and rotatably provided outside the first housing, a second housing coupled to the first housing to form a space together with an outer circumferential surface of the groove, a stator provided in the space, a rotation shaft coupled to the rotor and extended in one direction, and a sealer coupled to the first housing to surround the rotation shaft. The sealer includes a base rotatably coupled to the rotation shaft, a gasket brought into contact with an outer circumferential surface of the rotation shaft, and a cover coupled to the base to fix the gasket to the base. The base includes a first annular protruding portion spaced apart from the rotation shaft to support the gasket, and a second annular protruding portion spaced apart from the first annular protruding portion to support the gasket.

A motor includes a first housing having a groove, a rotor inserted into the groove and rotatably provided outside the first housing, a second housing coupled to the first housing to form a space together with an outer circumferential surface of the groove, a stator provided in the space, a rotation shaft coupled to the rotor and extended in one direction, and a sealer coupled to the first housing to surround the rotation shaft. The sealer includes a base rotatably coupled to the rotation shaft, a gasket brought into contact with an outer circumferential surface of the rotation shaft, and a cover coupled to the base to fix the gasket to the base. The base includes a first annular protruding portion spaced apart from the rotation shaft to support the gasket, and a second annular protruding portion spaced apart from the first annular protruding portion to support the gasket.

A throttle valve device includes a body, a valve, a motor, and a cover. The body defines a passage, a motor space, and a connecting portion that connects the motor space to the passage. The motor includes a motor yoke made of a magnetic material, a plurality of magnets that are arranged on an inner circumferential surface of the motor yoke. The plurality of magnets are magnetized in a state where the motor yoke is disposed in the motor space of the body. The plurality of magnets are arranged in a circumferential direction in the motor yoke with a space. The connecting portion is aligned with the space between the plurality of magnets in a radial direction of the motor yoke.

An object of the present invention is to provide a sealing member that provides high sealability in a coolant flow path. A rotating electrical machine includes a stator core around which a winding is wound, a stator frame that supports the stator core, a housing that is disposed outside the stator frame and forms a flow path space with the stator frame, and a sealing member that is disposed between the stator frame and the housing. The housing includes a mounting portion on which the sealing member is mounted. The sealing member includes a base portion that is in contact with the housing and the stator frame, and an attachment portion that protrudes from the base portion and is inserted to the mounting portion of the housing.

An object of the present invention is to provide a sealing member that provides high sealability in a coolant flow path. A rotating electrical machine includes a stator core around which a winding is wound, a stator frame that supports the stator core, a housing that is disposed outside the stator frame and forms a flow path space with the stator frame, and a sealing member that is disposed between the stator frame and the housing. The housing includes a mounting portion on which the sealing member is mounted. The sealing member includes a base portion that is in contact with the housing and the stator frame, and an attachment portion that protrudes from the base portion and is inserted to the mounting portion of the housing.

The present disclosure relates to the field of shaft sealing, and particularly relates to a sealing structure of an electric-machine-shaft extension end. The sealing structure of an electric-machine-shaft extension end includes an electric-machine end cap and an electric-machine-shaft extension end, the electric-machine-shaft extension end is mounted to the electric-machine end cap via a bearing, a double-oil-seal structure is provided between the electric-machine end cap and the electric-machine-shaft extension end, the double-oil-seal structure includes an oil-seal seat that is connected to the electric-machine end cap and an outer-side oil seal and an inner-side oil seal that are provided inside the oil-seal seat, the outer-side oil seal and the inner-side oil seal are provided face to face, and are interference-fitted to the oil-seal seat, and an oil storing chamber and an oil-seal spacer ring contained inside the oil storing chamber are provided between the outer-side oil seal and the inner-side oil seal.

The present disclosure relates to the field of shaft sealing, and particularly relates to a sealing structure of an electric-machine-shaft extension end. The sealing structure of an electric-machine-shaft extension end includes an electric-machine end cap and an electric-machine-shaft extension end, the electric-machine-shaft extension end is mounted to the electric-machine end cap via a bearing, a double-oil-seal structure is provided between the electric-machine end cap and the electric-machine-shaft extension end, the double-oil-seal structure includes an oil-seal seat that is connected to the electric-machine end cap and an outer-side oil seal and an inner-side oil seal that are provided inside the oil-seal seat, the outer-side oil seal and the inner-side oil seal are provided face to face, and are interference-fitted to the oil-seal seat, and an oil storing chamber and an oil-seal spacer ring contained inside the oil storing chamber are provided between the outer-side oil seal and the inner-side oil seal.