A wiper device including a wiper motor that includes a rotor and a coil to generate a rotating magnetic field, and that causes a wiper blade to perform a wiping operation by rotating the rotor according to the rotating magnetic field, a drive section that drives rotation of the wiper motor by performing current switch-on in the coil so as to generate the rotating magnetic field, and a controller that controls the drive section by a timing for current switch-on in the coil based on at least a rotation position of the rotor.

A motor includes a motor unit, a speed reduction mechanism, a motion conversion mechanism, and a housing. The motion conversion mechanism converts rotary motion of the speed reduction. mechanism into reciprocating rotary motion and transmits the motion to an output shaft. The speed reduction mechanism includes a worm, a first gear, and a second gear. The worm is disposed on a rotation shaft of the motor unit. The first gear transmits rotation of the worm and rotates about a first shaft. The second gear receives rotation of the first gear and rotates about a second shaft. The motion conversion mechanism includes a rotary member and a rod. The rotary member includes a sector gear and rotates about an axis of the first shaft. The rod couples the second gear and the rotary member. The output shaft includes an output gear that engages the sector gear.

Disclosed embodiments relate to a windscreen wiper drive of a windscreen wiper device of a rail vehicle. The drive includes at least one electric motor, a gear, the input shaft of which being connected to an output shaft of the electric motor, wherein an output shaft of the gear is provided for driving at least one windscreen wiper arm of a windscreen wiper, which arm swings back and forth with the output shaft, a rotation angle sensor unit, which detects a rotation of at least one element of the windscreen wiper drive, and a mechanical rotation angle limitation, which mechanically limits a rotational movement of at least one element of the windscreen wiper drive. The electric motor is formed by a disc motor and the gear is formed by a planetary gear.

A wiper device is provided. A boost control unit, if a duty ratio has reached an upper limit value determined in advance, and if the rotational speed of a motor is less than a target rotational speed, varies an advance angle and an energization angle associated with the energization of the motor in accordance with the target rotational speed. An overtemperature protection unit monitors a load state of the motor, and, upon detecting a high-load state, performs a first protection control for decreasing the rotational speed of the motor. A demagnetization protection unit, upon receipt of an operating signal from a wiper switch when the temperature detected by means of a temperature sensor exceeds a first threshold and the first protection control is being performed, performs a second protection control for fixing the advance angle and energization angle of the motor by prohibiting the operation of the boost control unit.

Wheel (100) for a vehicle window wiper drive system, said wheel comprising electrical contact means (400), a first and a second electrical contact means (410, 411) of said electrical contact means being in electrical continuity, and the first and the second electrical contact means being for a respective slider (200a, 200b), said wheel being characterized in that the angular extension () of said electrical contact means in the plane of the wheel is strictly less than 360 and said electrical contact means being situated on a face of the wheel intended to receive a linkage.

A windshield wiper system for an aircraft is provided and includes a motor, an output shaft, a wrap spring and crank rocker mechanism (WSCRM) to which the motor and the output shaft are coupled and a controller. By way of the WSCRM, first directional rotation input to the WSCRM from the motor via a two-stage gear reduction is converted such that the output shaft drives wiper blade oscillation through a first sweep angle and second directional rotation input to the WSCRM from the motor is converted such that the output shaft drives wiper blade oscillation through a second sweep angle. The controller is configured to control the motor such that the first directional rotation is continuously or non-continuously input during first or second flight conditions, respectively, and the second directional rotation is continuously input during third flight conditions.

A replay plate 44 is set to have a vertically and horizontally symmetrical shape when a worm wheel 33 is viewed from its axial direction; the worm wheel 33 is provided with an accommodating concave portion 33g in which the relay plate 44 is housed so as to be recessed in the axial direction; and a part of a non-slidably contacting surface in a slidably contacting surface 44a of the relay plate 44, i.e., a non-slidably contacting surface S is covered with first and second fixing parts 35a, 35b that are provided around the accommodating concave portion 33g and protrude in a direction intersecting with an axial direction of the worm wheel 33, the non-slidably contacting surface being a surface with which the contact plate is not slidably contacted.

A wiper motor including an electrically conductive housing in which a speed reduction mechanism is housed, a motor body housed within a yoke joined to the housing and having a power supply terminal that contacts a commutator so as to supply electric power to a rotor, and having a brush that includes a ground terminal having one end in contact with the commutator and another end connected to an electrically conductive partitioning wall of the housing that covers an opening in the yoke, a power supply line configured to supply electric power to the power supply terminal via a noise-suppression choke coil, a ground line connected to the partitioning wall and to ground, and a capacitor connecting the power supply line with the ground line, such that a noise component flowing through the ground line passes through the choke coil.

The invention relates to a gear motor (1) for a motor vehicle wiper system including an electric motor (2) including a rotor (20) and a rotation shaft (22) fixed to the rotor, a reduction gear mechanism (3) including a worm/worm wheel system, a device for generating an axial load configured to offset axial play of the rotation shaft (22), including a retaining wedge (6) mounted in a sliding manner in a radial direction of said rotation shaft (22), said retaining wedge (6) exerting an axial load on the outer race of a ball bearing (5) configured to guide the rotation shaft. According to the invention, said retaining wedge (6) is arranged in an intermediate position between the seat (40) of the bearing support (4) and the worm (30) directly adjacent to the worm wheel (31), said axial load (Fa) exerted by the retaining wedge (6) on the outer race (51) of the ball bearing (5) being in the direction away from the worm (30).

A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).