The power source of the wiper comes from the motor, which is the core of the whole wiper system. The quality requirement of wiper motor is quite high. It adopts DC permanent magnet motor, wiper motor mounted on the front windshield is generally integrated with worm gear and worm mechanical part. The function of worm gear and worm mechanism is to slow down and increase torsion. Its output shaft drives the four-bar linkage mechanism, through which the continuous rotation motion is changed into the motion of left and right swing.

Wiper motor adopts 3 brush structure to facilitate variable speed. The intermittent time is controlled by the intermittent relay. The wiper is scraped according to a certain period by using the charging and discharging function of the return switch contact of the motor and the resistance capacitance of the relay. The wiper blade strip is a tool to remove rain and dirt directly from the glass. The blade rubber strip is pressed to the glass surface by the spring strip, and its lip must match with the glass Angle in order to achieve the required performance.

In general, wiper control knob on the auto combination switch is equipped with three gears of low speed, high speed and intermittent. The top of the handle is the scrubber key switch. Press the switch and the washing water will be ejected. It will cooperate with the windshield of wiper scrubber. The scrubber system is a common device on the car at present. It consists of water storage tank, water pump, water supply pipe and water jet nozzle. The water storage tank is generally a 1.5l ~ 2l plastic tank, and the water pump is a miniature electric centrifugal pump, through which the washing water of the water storage tank is transported to the water jet. Through the extrusion of 2 ~ 4 water jets, the washing water is turned into a fine jet and sprayed to the wind shield, and the wiper plays the role of cleaning the wind shield.