After the wiper motor working principle.
The working principle of the rear wiper motor is to drive the connecting rod mechanism by the motor, and convert the rotating motion of the motor into the reciprocating motion of the wiper arm, so as to achieve the wiper action. This process involves several key steps and components that ensure the wiper is able to effectively remove rain or dirt from the windshield, giving the driver a clear view.
First of all, the rear wiper motor is the power source of the entire wiper system, usually using DC permanent magnet motors. This kind of motor receives electrical energy and generates rotating power through internal electromagnetic action. This rotating power is then transmitted through the connecting rod mechanism, converting the rotating motion of the motor into the reciprocating motion of the scraper arm, so that the wiper can work normally.
By controlling the current size of the motor, you can choose a high-speed or low-speed gear, thereby controlling the speed of the motor. The change of speed further affects the motion speed of the scraper arm and realizes the adjustment of the working speed of the wiper. Structurally, the rear end of the wiper motor is usually equipped with a small gear transmission, which can reduce the output speed of the motor to a suitable speed. This device is often referred to as the wiper drive assembly. The output shaft of the assembly is connected with the mechanical device of the wiper end, and the reciprocating swing of the wiper is realized by means of the fork drive and the spring return.
In addition, the modern car wiper is equipped with an electronic intermittent control system, so that the wiper stops scraping in a certain period, so that when driving in light rain or fog, there will be no sticky surface on the glass, thus giving the driver a better view. The intermittent control of the electric wiper can be divided into adjustable and non-adjustable, and the intermittent working mode of the wiper can be realized through complex circuit control.
In general, the working principle of the rear wiper motor is relatively simple, but its structural composition is quite precise, which can provide the driver with a clear vision and ensure driving safety.
Motor action of car wiper
Wiper motor is driven by the motor, through the connecting rod mechanism to turn the rotating motion of the motor into the reciprocating motion of the scraper arm, so as to achieve the wiper action, generally connected to the motor, you can make the wiper work, by choosing a high-speed and low speed, you can change the current size of the motor, so as to control the motor speed and then control the speed of the scraper arm. Wiper motor adopts 3 brush structure to facilitate speed change. The intermittent time is controlled by the intermittent relay, and the wiper is scraped according to a certain period by the charge and discharge function of the return switch contact of the motor and the relay resistance capacitance.
The rear end of the wiper motor has a small gear transmission enclosed in the same housing, which reduces the output speed to the required speed. This device is commonly known as the wiper drive assembly. The output shaft of the assembly is connected with the mechanical device of the wiper end, which realizes the reciprocating swing of the wiper through the fork drive and the spring return.
The blade strip of the wiper is a tool for directly removing rain and dirt on the glass. The blade rubber strip is pressed to the glass surface through the spring strip, and its lip must be consistent with the Angle of the glass in order to achieve the required performance. Under normal circumstances, there is a wiper control twist on the handle of the automobile combination switch, which is provided with three gears: low speed, high speed and intermittent. At the top of the handle is the key switch of the scrubber, pressing the switch will spray out the washing water, and wash the wind glass with the wiper.
The quality requirements of the wiper motor are quite high. It adopts DC permanent magnet motor, and the wiper motor installed on the front windshield is generally integrated with the worm gear mechanical part. The function of worm gear is to slow down and increase the torque, and its output shaft drives the four-link mechanism, through which the continuous rotating motion is changed to the motion of left and right swing.
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