An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).

An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).

A positioning actuator includes a stator assembly and a rotor, a printed circuit provided with electronic components, as well as a reduction gear for driving a rotary member. It includes two complementary blocks, the first block being made up of a shell having thermal conductivity no lower than 1 W/m/K, the first block including the reduction gear and having a passage for the output shaft of the reducing gear as well as an open opposing surface; the second block being formed by overmoulding the stator assembly and having a rear bearing recess for the rotor, the second block having a joining surface which complements a joining surface of the first block. The actuator also includes the electronic circuit which is positioned in a space defined between the first and second blocks. The disclosure also relates to a method for manufacturing such an actuator.

A positioning actuator includes a stator assembly and a rotor, a printed circuit provided with electronic components, as well as a reduction gear for driving a rotary member. It includes two complementary blocks, the first block being made up of a shell having thermal conductivity no lower than 1 W/m/K, the first block including the reduction gear and having a passage for the output shaft of the reducing gear as well as an open opposing surface; the second block being formed by overmoulding the stator assembly and having a rear bearing recess for the rotor, the second block having a joining surface which complements a joining surface of the first block. The actuator also includes the electronic circuit which is positioned in a space defined between the first and second blocks. The disclosure also relates to a method for manufacturing such an actuator.

An electrical machine has a nonmetallic housing having a stator band and an endplate, wherein the laminated stator core is in self-locked engagement with the housing. Another electrical machine has a unitary nonmetallic housing with an integral stator band and an integral endplate, wherein the laminated stator core is over-molded with the housing. Yet another electrical machine has a unitary nonmetallic housing with an integral stator band and an integral endplate, wherein the laminated stator core is in engagement with the stator band with an interference fit.

A drive mechanism including a brushed motor comprises a brushed motor including a commutator having a plurality of commutator segments and a brush contactable to the plurality of commutator segments, a movable member driven by the brushed motor, and a stopper member configured to stop rotation of the brushed motor by contacting the movable member. In a state in which the movable member contacts the stopper member to thereby stop the rotation of the brushed motor, the brush contacts only one of two adjacent commutator segments of the plurality of commutator segments.

A drive mechanism including a brushed motor comprises a brushed motor including a commutator having a plurality of commutator segments and a brush contactable to the plurality of commutator segments, a movable member driven by the brushed motor, and a stopper member configured to stop rotation of the brushed motor by contacting the movable member. In a state in which the movable member contacts the stopper member to thereby stop the rotation of the brushed motor, the brush contacts only one of two adjacent commutator segments of the plurality of commutator segments.

An electric work machine is driven appropriately. An electric work machine includes a motor including a stator, a rotor rotatable relative to the stator, and a rotor shaft fixed to the rotor, an output unit drivable by the rotor shaft, a plurality of heat-radiating fins, a motor case having an outer surface receiving the plurality of heat-radiating fins and accommodating the stator and the rotor, a cooling fan located outside the motor case and rotatable by the rotor shaft, and a duct including a guide to guide air through the cooling fan to a fin passage between adjacent heat-radiating fins of the plurality of heat-radiating fins.

A molded motor 100 includes a molded stator formed by providing a molding resin to a stator, a rotor inside the molded stator, a pair of bearings supporting a rotor shaft of the rotor, and an insulating bracket fitted in an inner circumferential part of an opening formed at an axial end of the molded stator to surround and support an outer ring of the bearing with a concave part formed at a center, and formed of an insulating resin.

A molded motor 100 includes a molded stator formed by providing a molding resin to a stator, a rotor inside the molded stator, a pair of bearings supporting a rotor shaft of the rotor, and an insulating bracket fitted in an inner circumferential part of an opening formed at an axial end of the molded stator to surround and support an outer ring of the bearing with a concave part formed at a center, and formed of an insulating resin.