A brushless motor is at least partially located in a hermetically sealed space. An electric work machine includes a brushless motor, an output unit, a motor case, a lead wire, and a first seal. The brushless motor includes a stator, a rotor rotatable with respect to the stator, and a rotor shaft fixed to the rotor. The output unit is drivable by the rotor shaft. The motor case includes an internal space and a wiring passage. The internal space accommodates the stator and the rotor. The lead wire is located in the wiring passage connecting the internal space and an external space of the motor case. The first seal seals between the lead wire and the motor case.

In this molded structure of the brushless fan motor, at least a part of a circuit board is supported by a notch portion in a distal end portion of a projecting end formed on a board storage portion side and a rotary shaft side of an insulator, the board storage portion and the insulator are placed in such a manner as to surround a periphery of a bearing support tube portion, a part of a molded portion is disposed between the bearing support tube portion and the insulator and between the board storage portion and the insulator, and the entire circuit board located inside a storage chamber, excluding the portion supported by the projecting end formed on the board storage portion side of the insulator, is covered with the part of the molded portion.

An electric actuator includes a motor which has a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction, a motor case for housing the motor, and a deceleration mechanism coupled to one axial side of the motor shaft. The motor case has a case cylinder portion, a lid for covering, and a plurality of screws. The case cylinder portion has a plurality of screw fixing portions. The lid has a top plate portion, an outer cylinder portion which surrounds the case cylinder portion from a radial outer side, an annular groove portion, and a seal member which seals the opening portion of the case cylinder portion. In the lid, an axial thickness of a region which overlaps the annular groove portion as viewed in the axial direction is larger than an axial thickness of the top plate portion.

An electric actuator includes a motor which has a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction, a motor case for housing the motor, and a deceleration mechanism coupled to one axial side of the motor shaft. The motor case has a case cylinder portion, a lid for covering, and a plurality of screws. The case cylinder portion has a plurality of screw fixing portions. The lid has a top plate portion, an outer cylinder portion which surrounds the case cylinder portion from a radial outer side, an annular groove portion, and a seal member which seals the opening portion of the case cylinder portion. In the lid, an axial thickness of a region which overlaps the annular groove portion as viewed in the axial direction is larger than an axial thickness of the top plate portion.

A rotary actuator is used in a shift-by-wire system for a vehicle. The actuator includes a motor, an output shaft, a speed reducer, and a case. The motor includes a motor shaft. The output shaft is disposed in parallel with the motor shaft. The case houses the motor and the speed reducer. The case includes an upper case that houses the motor and a lower case that houses the speed reducer. The speed reducer includes a first reducer that includes a ring gear embedded in a resin portion of the lower case and a parallel-shaft type second reducer that includes a drive gear on the motor shaft and a driven gear on the output shaft. The ring gear includes an annular gear portion and a cover that protrudes radially inward from one end of the annular gear portion.

A rotary actuator is used in a shift-by-wire system for a vehicle. The actuator includes a motor, an output shaft, a speed reducer, and a case. The motor includes a motor shaft. The output shaft is disposed in parallel with the motor shaft. The case houses the motor and the speed reducer. The case includes an upper case that houses the motor and a lower case that houses the speed reducer. The speed reducer includes a first reducer that includes a ring gear embedded in a resin portion of the lower case and a parallel-shaft type second reducer that includes a drive gear on the motor shaft and a driven gear on the output shaft. The ring gear includes an annular gear portion and a cover that protrudes radially inward from one end of the annular gear portion.

The invention relates to drive apparatus for adjustment devices of motor vehicles comprising an at least two-part housing (1), in which an electric drive unit (2) and a gear unit (3) which is operatively connected to said electric drive unit are arranged, characterized in that the housing (1) is designed as part of the gear unit (3).

An object of the present invention is to provide a power conversion device configured to attain suppression of heat concentration and miniaturization of the device. The power conversion device 40 includes a power module 17 for converting dc power into ac power, a first circuit substrate (power circuit substrate) 16 including a capacitor 31 for smoothing the dc power, and a casing 20 for storing the power module 17 and the first circuit substrate 16. Either the first circuit substrate 16 or the power module 17 is disposed on an inner surface 20bb of a side wall 20b having an outer wall surface 20ba of the casing 20, and the other is disposed on a predetermined inner wall surface 20a of the casing 20 to form an angle with the inner surface 20bb.

A dynamo-electric machine includes a stator, a rotor disposed in the stator, a bottomed tubular case that accommodates the stator, an end cover mounted on an open end of the case, and a circuit substrate that controls driving of the dynamo-electric machine. The stator includes a core having portions that protrude toward a center of the stator, insulators mounted on the stator core, and a coil wound around each of the protruding portions with the insulators therebetween. The circuit substrate is disposed inward of an outer end of the case and is disposed between the stator and the end cover, and includes a first insulation sheet disposed between the circuit substrate and the stator to insulate the circuit substrate and the coil; and a second insulation sheet disposed between the circuit substrate and the end cover to insulate the circuit substrate and the end cover.

A dynamo-electric machine includes a stator, a rotor disposed in the stator, a bottomed tubular case that accommodates the stator, an end cover mounted on an open end of the case, and a circuit substrate that controls driving of the dynamo-electric machine. The stator includes a core having portions that protrude toward a center of the stator, insulators mounted on the stator core, and a coil wound around each of the protruding portions with the insulators therebetween. The circuit substrate is disposed inward of an outer end of the case and is disposed between the stator and the end cover, and includes a first insulation sheet disposed between the circuit substrate and the stator to insulate the circuit substrate and the coil; and a second insulation sheet disposed between the circuit substrate and the end cover to insulate the circuit substrate and the end cover.