Abstract: A rotor rotates about an axis and includes: a core stack including core blocks stacked in tiers in an axial direction of the axis, each core block including steel plates stacked in the axial direction and having insertion holes arranged in a circumferential direction; magnets located within the insertion holes; and resin materials fixing the magnets inside the insertion holes. The core blocks adjacent to each other in the axial direction are angularly displaced from each other about the axis. The insertion holes of the core blocks adjacent to each other in the axial direction communicate with each other in the axial direction. Each of the resin materials includes a filling portion located within the insertion hole, a first gate located on a first side of the filling portion in the axial direction, and a second gate located on a second side of the filling portion in the axial direction.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions across the teeth, first and second pins each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. The working portion of the second pin is disposed on one of the outermost and innermost stages of the slot, and the working portion of the third pin is disposed on one or the other of the outermost and innermost stages of the slot. A number of teeth straddled by the second pin is larger by two than a number of teeth straddled by the first pin.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions disposed across the teeth, a first pin and a second pin each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. Each of the working portions of the second pin and the third pin is disposed in one of an outermost stage and an innermost stage of the slot. A number of teeth straddled by the second pin is smaller than a number of teeth straddled by the first pin.

Abstract: A stator unit includes: a stator core; three-phase coils inserted into slots of the stator core; a neutral point busbar connected to the three-phase coils; a busbar holder made of a resin material and covering at least a part of the neutral point busbar; and a temperature sensor that is fixed to the busbar holder while in contact with the neutral point busbar, the temperature sensor measuring the temperature of the neutral point busbar.

Abstract: A busbar unit includes: three-phase busbars connected to three-phase coils; and three-phase external terminals that are members different from the three-phase busbars, the three-phase external terminals being connected to the three-phase busbars and electrically connected to a power supply source. Each of the three-phase external terminals includes: a terminal body portion; a busbar-side connection portion connected to a busbar of one phase from among the three-phase busbars; and a power-supply-source-side connection portion electrically connected to the power supply source. At least two terminals among the three-phase external terminals are different in length of a conduction path through which a current flows between the busbar-side connection portion and the power-supply-source-side connection portion in the terminal body portion.

Abstract: A stator includes three-phase coils in which slot accommodation portions are accommodated inside slots; three external terminals; and three busbars that electrically connect the external terminals and the coils. A first coil end and a second coil end that are positioned respectively at the ends of each of the coils extend from the radially outermost side of the slots toward the first side or the second side in the axial direction of the stator core. The winding-start coil ends of the three-phase coils are connected to busbar connection portions of different busbars.

Abstract: A stator includes a stator core, three-phase coils, three external terminals, and three busbars. Each of the three-phase coils has a first coil end protruding from the radially outermost side of a slot to a first side in the axial direction of the stator core. Each of the three bus bars includes a busbar body portion extending in a circumferential direction of the stator core, a busbar connection portion extending toward the first side in the axial direction, and an external terminal connection portion extending outward in the radial direction and connected to the external terminal. The first coil end extends in the radial direction through between the busbar body portion and the stator core in the axial direction, extends toward the first side in the axial direction on a radially outer side of the busbar body portion, and has a tip connected to the busbar connection portion from the radially outer side.

Abstract: A motor includes a rotor, a back cover, a housing, and a brush card assembly. The rotor includes a core fixed to a shaft, a coil that magnetizes a core, and a commutator connected to the coil. The back cover includes a back cover bottom surface portion, and a back cover cylindrical portion on an outer periphery of the back cover bottom surface portion to have a cylindrical shape. The brush card assembly includes a brush card bottom surface portion spaced apart from the back cover bottom surface portion in an axial direction through a first gap. The brush card bottom surface holds brushes and includes a nip portion nipped by the back cover and the housing, an outer peripheral wall spaced apart from the back cover cylindrical portion in a radial direction through a second gap, and contact portions contacting the back cover cylindrical portion.

Abstract: A motor includes a rotor, a back cover, a housing, and a brush card assembly. The rotor includes a core fixed to a shaft, a coil that magnetizes a core, and a commutator connected to the coil. The back cover includes a back cover bottom surface portion, and a back cover cylindrical portion on an outer periphery of the back cover bottom surface portion to have a cylindrical shape. The brush card assembly includes a brush card bottom surface portion spaced apart from the back cover bottom surface portion in an axial direction through a first gap. The brush card bottom surface holds brushes and includes a nip portion nipped by the back cover and the housing, an outer peripheral wall spaced apart from the back cover cylindrical portion in a radial direction through a second gap, and contact portions contacting the back cover cylindrical portion.

Abstract: A motor includes a rotor, a brush card assembly arranged to supply an electric current to the rotor, a housing, a permanent magnet, and a bearing. The rotor includes a core fixed to a shaft, a coil arranged to excite the core and a commutator connected to the coil. The coil is wound around the core in a concentrated winding method. The brush card assembly includes at least one pair of brushes having different polarities, the brushes disposed along a circumferential direction and connected to each other via the commutator and the coil, a X capacitor parallel-connected to the brushes, Y capacitors parallel-connected to the brushes and a brush card arranged to hold the brushes, the X capacitor and the Y capacitors. The brush card includes a ground portion. The X capacitor is positioned between the brushes in the circumferential direction. The Y capacitors are connected to the ground portion.

Abstract: A motor includes a housing, a back cover, a brush card, a brush, and a connector member. The back cover includes a first rear wall portion and a first peripheral wall portion. The first peripheral wall portion includes a through-hole and a cut-out. The through-hole vertically penetrates through the first peripheral wall portion at or near a lower end portion of the first peripheral wall portion. The cut-out is disposed farther on an upper side than the through-hole. The connector member is fitted into the cut-out. An outer surface of the connector member is provided with a flow path groove that extends in both peripheral and axial directions. The motor includes a flow path surface on an inner surface of the back cover. The flow path surface continues from a portion that opposes the flow path groove on a lower side of the flow path groove to the through-hole.

Abstract: A motor includes an armature core having m×n teeth (m is an odd number ?3, and n is a natural number ?2), a plurality of coils, and a commutator. The motor further includes field magnets including 2n magnetic poles and at least a first-potential brush and at least a second-potential brush. The commutator includes a segment group defined by 2m×n segments. Only the coil defined by winding a continuous conducting wire in a predetermined winding direction is disposed in each of k teeth among the m×n teeth, and only the coil defined by winding the continuous conducting wire in a direction reverse to the predetermined winding direction is disposed in each of teeth disposed at a position separated from each of the k teeth at 360×i degrees (i is a natural number ?(n?1)) of electric angles.

Abstract: A motor includes a rotor, a brush card assembly arranged to supply an electric current to the rotor, a housing, a permanent magnet, and a bearing. The rotor includes a core fixed to a shaft, a coil arranged to excite the core and a commutator connected to the coil. The coil is wound around the core in a concentrated winding method. The brush card assembly includes at least one pair of brushes having different polarities, the brushes disposed along a circumferential direction and connected to each other via the commutator and the coil, a X capacitor parallel-connected to the brushes, Y capacitors parallel-connected to the brushes and a brush card arranged to hold the brushes, the X capacitor and the Y capacitors. The brush card includes a ground portion. The X capacitor is positioned between the brushes in the circumferential direction. The Y capacitors are connected to the ground portion.

Abstract: A winding structure which is disposed over an armature and a commutator includes an equalizer. The equalizer includes a going portion and a return portion which are wound across one group of teeth through a slot and connected between two identical segments. In a case where an integer number is an expansion value among values which are integer multiples of a value which is acquired by dividing the total number of the slots by the total number of pole pairs, when one group of the teeth having the same total number as the expansion value is given as an element teeth group, the going portion and the return portion are wound across the element teeth group through the slots positioned at both sides of the element teeth group.

Abstract: A motor includes an armature core having m×n teeth (m is an odd number 3, and n is a natural number 2), a plurality of coils, and a commutator. The motor further includes field magnets including 2n magnetic poles and at least a first-potential brush and at least a second-potential brush. The commutator includes a segment group defined by 2m×n segments. Only the coil defined by winding a continuous conducting wire in a predetermined winding direction is disposed in each of k teeth among the m×n teeth, and only the coil defined by winding the continuous conducting wire in a direction reverse to the predetermined winding direction is disposed in each of teeth disposed at a position separated from each of the k teeth at 360×i degrees (i is a natural number?(n?1)) of electric angles.

Abstract: A motor includes a housing, a back cover, a brush card, and a brush. The brush card is disposed in a casing defined by the housing and the back cover. The brush is disposed on a front side of the brush card. The back cover includes a through-hole in the vicinity of a lower end portion of a first circumferential wall portion. The back cover and the brush card are in contact with each other in an annular or substantially annular shape, in a radially inner side of an inner circumferential surface of the first circumferential wall portion via a gap. The contact portion is disconnected, or the brush card is radially penetrated, at a position that radially overlaps with the through-hole.

Abstract: A motor includes a housing, a back cover, a brush card, a brush, and a connector member. The back cover includes a first rear wall portion and a first peripheral wall portion. The first peripheral wall portion includes a through-hole and a cut-out. The through-hole vertically penetrates through the first peripheral wall portion at or near a lower end portion of the first peripheral wall portion. The cut-out is disposed farther on an upper side than the through-hole. The connector member is fitted into the cut-out. An outer surface of the connector member is provided with a flow path groove that extends in both peripheral and axial directions. The motor includes a flow path surface on an inner surface of the back cover. The flow path surface continues from a portion that opposes the flow path groove on a lower side of the flow path groove to the through-hole.

Abstract: A winding structure which is disposed over an armature and a commutator includes an equalizer. The equalizer includes a going portion and a return portion which are wound across one group of teeth through a slot and connected between two identical segments. In a case where an integer number is an expansion value among values which are integer multiples of a value which is acquired by dividing the total number of the slots by the total number of pole pairs, when one group of the teeth having the same total number as the expansion value is given as an element teeth group, the going portion and the return portion are wound across the element teeth group through the slots positioned at both sides of the element teeth group.

Abstract: A motor used in a hydraulic shock absorber which absorbs the vibrations generated by an engine of a vehicle includes a rotor portion, a stator portion, and a bearing mechanism. The bearing mechanism includes a sleeve, a sleeve holder, and a chip member. The sleeve holder includes a single component having a cylindrical portion which covers an outer circumferential surface of the sleeve, and a bottom portion which covers a lower portion of the cylindrical portion.

Abstract: In a bearing assembly, a shaft is inserted into a sleeve, and a lower end of the shaft is attracted to a magnet chip which is held by an auxiliary yoke. A retaining member and an auxiliary washer are sandwiched between a lower end surface of the sleeve and a contact portion of the auxiliary yoke so as to retain the shaft in the sleeve. The auxiliary washer has an inner diameter larger than that of the retaining member and a maximum diameter of the lower end of the shaft.