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.

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.

A motor includes a rotor, a frame accommodating the rotor, a cover provided at one of two ends of the frame in a direction of a rotor axis, an internal space formed by the frame and the cover and a partition part partitioning the internal space into two spaces. The partition part includes an insertion portion. A part of the cover is inserted into the insertion portion.

A motor includes a rotor, a frame accommodating the rotor, a cover provided at one of two ends of the frame in a direction of a rotor axis, an internal space formed by the frame and the cover and a partition part partitioning the internal space into two spaces. The partition part includes an insertion portion. A part of the cover is inserted into the insertion portion.

A brush device includes a holder, a brush, a choke coil, and a terminal member. The holder includes a base extending in a direction orthogonal to an axial direction of an armature. The choke coil includes a core and a winding. The core extends in the axial direction of the armature and includes a first end surface in a longitudinal direction faced toward the base of the holder and a second end surface in the longitudinal direction located at a side opposite to the first end surface. The terminal member is coupled to the holder and connected to the winding. The terminal member includes a contact portion that is in contact with the second end surface of the core.

A brush device includes a holder, a brush, a choke coil, and a terminal member. The holder includes a base extending in a direction orthogonal to an axial direction of an armature. The choke coil includes a core and a winding. The core extends in the axial direction of the armature and includes a first end surface in a longitudinal direction faced toward the base of the holder and a second end surface in the longitudinal direction located at a side opposite to the first end surface. The terminal member is coupled to the holder and connected to the winding. The terminal member includes a contact portion that is in contact with the second end surface of the core.

A concrete vibrator system includes a concrete vibrator having a motor, a vibratory head that is actuated by the motor, and a controller that controls the motor. The concrete vibrator system may also include one or more remote devices or servers that wirelessly communicate with the controller of the concrete vibrator. The remote device may monitor the speed output by the motor and the voltage supplied to the motor to achieve a set speed via the controller, and display information representative of the motor speed and motor voltage to the user. Moreover, the speed output by the motor may be controlled using voltage supplied to the motor.

A concrete vibrator system includes a concrete vibrator having a motor, a vibratory head that is actuated by the motor, and a controller that controls the motor. The concrete vibrator system may also include one or more remote devices or servers that wirelessly communicate with the controller of the concrete vibrator. The remote device may monitor the speed output by the motor and the voltage supplied to the motor to achieve a set speed via the controller, and display information representative of the motor speed and motor voltage to the user. Moreover, the speed output by the motor may be controlled using voltage supplied to the motor.

A power tool comprising: a conductive tube; a rear unit located at a rear end of the tube; a front unit located at a front end of the tube; a battery interface comprising a plurality of terminals, wherein the battery interface is located in the rear unit; a motor located in the front unit; at least one power line for supplying power from the rear unit to the front unit, wherein at least a portion of the power line is located within the tube; and an electromagnetic interference (EMI) suppressor for suppressing EMI from the at least one power line, the EMI suppressor comprising an electrical component electrically connecting the tube to a first terminal of the plurality of terminals.

A power tool comprising: a conductive tube; a rear unit located at a rear end of the tube; a front unit located at a front end of the tube; a battery interface comprising a plurality of terminals, wherein the battery interface is located in the rear unit; a motor located in the front unit; at least one power line for supplying power from the rear unit to the front unit, wherein at least a portion of the power line is located within the tube; and an electromagnetic interference (EMI) suppressor for suppressing EMI from the at least one power line, the EMI suppressor comprising an electrical component electrically connecting the tube to a first terminal of the plurality of terminals.