Abstract: A motor housing includes a bearing holder that holds a first bearing and accommodates a rotor and a stator. A second bearing is disposed inside a motor shaft at one axial end portion of the motor shaft and has lower electric resistance than the first bearing. The conductive member electrically connects the second bearing to a motor housing. The radially outer end portion of the second bearing is in contact with the inner peripheral surface of the motor shaft. The contact portion of the conductive member is in contact with the radially inner end portion of the second bearing. The fixed portion is fixed to the motor housing radially outward of the motor shaft. A bridge portion connects the contact portion and the fixed portion.

Abstract: A motor may include an armature; a cylindrical housing; a brush card assembly; a cylindrical bracket positioned under the brush card assembly and directly fixed to the housing; and a seal member made of elastomer. The brush card assembly may include a cylindrical portion and a flange portion. The seal member may include a first seal portion fitted between the top surface of the flange portion and the housing, or the bottom surface of the flange portion and the bracket, in an axial direction while contacting the top surface and the housing or the bottom surface and the bracket. At least one of a radially inner surface of the housing and a radially inner surface of the bracket may include an inclined surface. The first seal portion may be fitted between the housing and the bracket through the inclined surface while contacting the housing and the bracket.

Abstract: A motor may include an armature; a cylindrical housing; a brush card assembly; a cylindrical bracket positioned under the brush card assembly and fixed to the housing; and a seal member positioned between the housing and the bracket and made of elastomer. The housing and the bracket may be made of metal. The brush card assembly may include a cylindrical portion and a flange portion. The seal member may include an upper portion and a lower portion. A housing lower end surface and a bracket upper end surface may face each other. The housing lower end surface and the bracket upper end surface may include contact portions contacting and separation portions separated in the axial direction. The motor may include a radial opening positioned axially between the separation portions and open in a radial direction. The seal member may include an intervening portion positioned in the radial opening.

Abstract: A motor may include a shaft, an armature, a commutator, a bearing, a housing, a bracket, and a brush card assembly. The brush card assembly may include a brush contacting the commutator, and a brush card holding the brush. The bracket may include a bracket bottom portion covering at least a portion of a lower side of the brush card, a cylindrical bracket cylindrical portion extending upwardly from a radially outer edge of the bracket bottom portion, a bearing holding portion extending upwardly from the bracket bottom portion at a radially inner side of the bracket cylindrical portion, and holding the bearing, and a rib positioned above the bracket bottom portion, and extending radially outward from the bearing holding portion.

Abstract: A motor may include a shaft, an armature, a commutator, a bearing, a housing, a bracket, and a brush card assembly. The brush card assembly may include a brush contacting the commutator, and a brush card holding the brush. The bracket may include a bracket bottom portion covering at least a portion of a lower side of the brush card, a cylindrical bracket cylindrical portion extending upwardly from a radially outer edge of the bracket bottom portion, a bearing holding portion extending upwardly from the bracket bottom portion at a radially inner side of the bracket cylindrical portion, and holding the bearing, and a rib positioned above the bracket bottom portion, and extending radially outward from the bearing holding portion.

Abstract: A motor may include an armature; a cylindrical housing; a brush card assembly; a cylindrical bracket positioned under the brush card assembly and fixed to the housing; and a seal member positioned between the housing and the bracket and made of elastomer. The housing and the bracket may be made of metal. The brush card assembly may include a cylindrical portion and a flange portion. The seal member may include an upper portion and a lower portion. A housing lower end surface and a bracket upper end surface may face each other. The housing lower end surface and the bracket upper end surface may include contact portions contacting and separation portions separated in the axial direction. The motor may include a radial opening positioned axially between the separation portions and open in a radial direction. The seal member may include an intervening portion positioned in the radial opening.

Abstract: A motor may include an armature; a cylindrical housing; a brush card assembly; a cylindrical bracket positioned under the brush card assembly and directly fixed to the housing; and a seal member made of elastomer. The brush card assembly may include a cylindrical portion and a flange portion. The seal member may include a first seal portion fitted between the top surface of the flange portion and the housing, or the bottom surface of the flange portion and the bracket, in an axial direction while contacting the top surface and the housing or the bottom surface and the bracket. At least one of a radially inner surface of the housing and a radially inner surface of the bracket may include an inclined surface. The first seal portion may be fitted between the housing and the bracket through the inclined surface while contacting the housing and the bracket.

Abstract: A rotor includes a laminated core, a plurality of magnets, and a resin portion. The laminated core includes a plurality of outer core portions arranged in a circumferential direction. The plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction. In addition, the outer core portion includes a through-hole that penetrates in an axial direction. The resin portion includes a columnar portion that is disposed inside the through-hole. Accordingly, the rigidity of the resin portion is enhanced. In addition, the resin portion includes a gate mark portion. At least a portion of the gate mark portion is positioned farther radially inward than the through-hole.

Abstract: A laminated core of a rotor includes an inner core portion and a plurality of outer core portions. The inner core portion axially extends in a cylindrical shape in a region located more radially inward than magnets. The outer core portions are arranged in a circumferential direction in a region located more radially outward than the inner core portion. The plurality of outer core portions and a plurality of the magnets are alternately arranged in the circumferential direction. Accordingly, magnetic flux generated from a pair of magnetic pole surfaces of the plurality of magnets can be effectively used. In addition, the laminated core includes caulking portions in each of the inner core portion and the plurality of outer core portions. Accordingly, a plurality of thin plate cores are firmly fixed.

Abstract: In a busbar unit, which is a distributing device arranged to supply electrical currents to coils, a busbar holder is arranged to support coil connection busbars and sensor connection busbars. Conductor wire connection portions of the coil connection busbars are exposed on both axial sides and welded to a conductor wire defining the coils. The sensor connection busbars are combined with a plurality of electronic components to define a Hall IC circuit designed to output and receive electrical signals to or from Hall ICs. Sensor connection portions of the sensor connection busbars are exposed on both axial sides, and welded to terminals of the Hall ICs. Electronic component connection portions of the sensor connection busbars are exposed on both axial sides, and welded to the electronic components.

Abstract: In a busbar unit, which is a distributing device arranged to supply electrical currents to coils, a busbar holder is arranged to support coil connection busbars and sensor connection busbars. A bottom surface portion of a busbar holder body portion includes a bearing holder holding a bearing defined therein, and includes resistors and capacitors defining a portion of a Hall IC circuit arranged thereon. The Hall IC circuit is arranged to input and output electrical signals to or from Hall ICs. An upper surface portion includes sensor holders each holding a separate one of the Hall ICs defined therein. A connector portion is arranged to project radially outward from the busbar holder body portion. The sensor connection busbars and each of the coil connection busbars are arranged one above another along an axial direction.

Abstract: A rotor includes a laminated core, a plurality of magnets, and a resin portion. The laminated core includes a plurality of outer core portions arranged in a circumferential direction. The plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction. In addition, the outer core portion includes a through-hole that penetrates in an axial direction. The resin portion includes a columnar portion that is disposed inside the through-hole. Accordingly, the rigidity of the resin portion is enhanced. In addition, the resin portion includes a gate mark portion. At least a portion of the gate mark portion is positioned farther radially inward than the through-hole.

Abstract: A laminated core of a rotor includes an inner core portion and a plurality of outer core portions. The inner core portion axially extends in a cylindrical shape in a region located more radially inward than magnets. The outer core portions are arranged in a circumferential direction in a region located more radially outward than the inner core portion. The plurality of outer core portions and a plurality of the magnets are alternately arranged in the circumferential direction. Accordingly, magnetic flux generated from a pair of magnetic pole surfaces of the plurality of magnets can be effectively used. In addition, the laminated core includes caulking portions in each of the inner core portion and the plurality of outer core portions. Accordingly, a plurality of thin plate cores are firmly fixed.

Abstract: An electric pump for use with an engine in a vehicle is provided. The electric pump has an impeller having a plurality of blades for moving coolant. A working surface of each blade is formed to be a flat plane which extends generally straight in both an axial direction and a radial direction. The electric pump is formed by a centrifugal pump. When the electric pump is not operating and is used as a portion of a coolant passage, flowing resistance can be reduced as compared with a case where the working surface of each blade is curved.

Abstract: In a busbar unit, which is a distributing device arranged to supply electrical currents to coils, a busbar holder is arranged to support coil connection busbars and sensor connection busbars. A bottom surface portion of a busbar holder body portion includes a bearing holder holding a bearing defined therein, and includes resistors and capacitors defining a portion of a Hall IC circuit arranged thereon. The Hall IC circuit is arranged to input and output electrical signals to or from Hall ICs. An upper surface portion includes sensor holders each holding a separate one of the Hall ICs defined therein. A connector portion is arranged to project radially outward from the busbar holder body portion. The sensor connection busbars and each of the coil connection busbars are arranged one above another along an axial direction.

Abstract: In a busbar unit, which is a distributing device arranged to supply electrical currents to coils, a busbar holder is arranged to support coil connection busbars and sensor connection busbars. Conductor wire connection portions of the coil connection busbars are exposed on both axial sides and welded to a conductor wire defining the coils. The sensor connection busbars are combined with a plurality of electronic components to define a Hall IC circuit designed to output and receive electrical signals to or from Hall ICs. Sensor connection portions of the sensor connection busbars are exposed on both axial sides, and welded to terminals of the Hall ICs. Electronic component connection portions of the sensor connection busbars are exposed on both axial sides, and welded to the electronic components.