Disclosed is an aircraft windshield wiper system, having: a wiper arm; a reversible motor that drives the wiper arm, the motor including: a stator; a rotor configured to rotate relative to the stator; a forward shaft segment that is driven by the rotor and being rotationally connected to the wiper arm; an aft shaft segment that is driven by the rotor, the aft shaft segment including a forward end and an aft end; a ball nut that translates along the aft shaft segment from rotation of the aft shaft segment; a forward stop at a forward end of the aft shaft segment, configured to stop forward translational motion of the ball nut along the aft shaft segment; and an aft stop at an aft end of the aft shaft segment, configured to stop aft translational motion of the ball nut along the aft shaft segment.

A windshield wiper system (WWS) is provided. The WWS includes a brushless direct current (BLDC) motor, a wiper arm and blade, a gearbox/converter operably interposed between the BLDC motor and the wiper arm and blade and a smart motor drive configured to determine a WWS failure condition and to operate the BLDC motor according to the determination.

The invention relates to a toothed wheel (116) for a gear motor (10) of a window wiper, in particular of a motor vehicle, this wheel having a central member (120, 128) defining an axis of rotation A and two opposite substantially parallel faces, a first of said faces including an orifice (124) having an axis B and intended to receive a pin (26) of a linkage (38) of the gear motor, characterized in that it comprises, on said first face, abutment means (128a, 154a) in an axial direction and/or in a radial direction relative to axis A and means (128a, 154a, 152a) for guiding sliding in a circumferential direction about the axis A, said abutment and guide means being configured to cooperate with said pin during the assembly of the toothed wheel with the linkage in order to facilitate the insertion of the pin into the orifice.

A windshield wiper system (WWS) is provided and includes a brushless direct current (BLDC) motor with a motor output shaft gear, a gear train and an internally cut sector gear. The gear train includes a first gear, which has a first diameter and engages with the motor output shaft gear, and a second gear, which has a second diameter that is shorter than the first diameter and rotates with the first gear. The internally cut sector gear is coupled with an output shaft and formed to define an internal geared groove that engages with the second gear.

The invention relates to a wiper motor (10; 10a), having a gearbox housing (12) which preferably has a pot-shaped main body (16) for configuring a receptacle space (18) for a gearbox (20), wherein an opening (21) of the main body (16) is able to be closed by a gearbox cover (22; 22a), wherein a plurality of latching connections (26) that act in the direction of a joining direction (24) between the main body (16) and the gearbox cover (22; 22a) are configured between the main body (16) and the gearbox cover (22; 22a), said latching connections (26) having in each case an elastically deformable first latching element (28; 28a) on the gearbox cover (22; 22a) and a rigidly configured second latching element (30) that on the main body (16) interacts in a form-fitting manner with the first latching element (28; 28a).

A method for attaching a plastic barrel configured to guide an output shaft of a mechanical device to a housing for the mechanical device is disclosed. The housing includes a chimney delimited by an upper edge and a base, the chimney being arranged to partially surround the output shaft, the plastic barrel having a lateral protuberance. The method involves at least the following steps: inserting a first end of the plastic barrel into the chimney of the housing until the lateral protuberance axially abuts against the upper edge of the chimney, and at least partially deforming the first end of the plastic barrel in order to form an axial counter-abutment.

A brushless motor includes a motor part and a gear part. The motor part includes: a rotating shaft, having a first gear; a rotor, having a bottom wall and a side wall, the bottom wall being fixed to the rotating shaft; magnets, fixed to the side wall and arranged side by side in a circumferential direction of the rotor; a stator, provided between the rotating shaft and the magnets in a radial direction of the rotor and wound with a coil; and a motor housing, rotatably supporting the rotating shaft, and accommodating the rotor and the stator. The gear part includes: a second gear, meshed with the first gear; an output shaft, having an output part, having a base end side thereof fixed to the second gear, and parallel to the rotating shaft; and a gear housing, rotatably supporting the output shaft, and accommodating the second gear.

A wiper device that includes: a first control section that, during intermittent operation, controls power supply to a drive source such that a wiper blade wipes to-and-fro between a first return position and a second return position on a windshield and stops moving for a predetermined duration at the first return position, and that performs position retention control that controls power supply to the drive source such that the stopped wiper blade is retained at a position at which the wiper blade is stopped; and a second control section that suspends the position retention control by the first control section in a case in which a current flowing in the drive source is detected to have increased by a predetermined value or greater while the wiper blade moves toward the first return position within a predetermined region in a vicinity of the first return position.

Since a shape of a stator 44 is made mirror symmetric with respect to a rotor 45 as a 4-pole/6-slot type, rotational deflection of the rotor 45 can be suppressed. As the minimum number of poles and the minimum number of slots, which can suppress the rotational deflection of the rotor 45, a frequency of magnetic noises approaches a frequency of mechanical noises. Thus, it is possible to integrate the whole noises generated by the DR-side wiper motor 21 into a low frequency range thereof, and to make the acoustic sensitivity (dB) of a vehicle interior smaller. Since the stator 44 is fixed inside a housing 40 and mounting legs fixed to a vehicle body fixed portion are provided in the housing 40, the stator 40, which is a source of the magnetic noises, can be fixed to a vehicle via only the housing 40. Therefore, a brushless wiper motor with quietness improved further can be designed.

A brushless direct current electric motor for a wiping system. The brushless direct current electric motor includes a rotor, a stator, a Hall effect sensor to detect control magnet angular position of the rotor, and a control unit to determine rotor angular positions in relation to the stator from the signals Hall effect sensor signals and to generate control signals to electromagnetic excitation coils of the rotor as a function of the determined angular position of the rotor. The control unit includes a clock configured to: estimate the angular position of the rotor at predetermined instants lying between two changes of state of the Hall effect sensor, determine values of the control voltages associated with the angular positions of the rotor estimated for the predetermined instants, and generate a substantially sinusoidal control signal from the determined voltage values.