Why does the bottom left side of the wiper shake?

[GrantAnn]

There are impurities or foreign objects on the wiper blade or the glass surface, which cause noticeable resistance when the wiper moves to certain positions, resulting in shaking. Below is relevant information about the wiper: 1. Operating Principle: The power source of the wiper comes from the motor, which is the core of the entire wiper system. The quality requirements for the motor in the wiper are quite high. It uses a 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 the worm gear mechanism is to reduce speed and increase torque. Its output shaft drives the four-bar linkage mechanism, which converts continuous rotational motion into left-right swinging motion. 2. Basic Introduction: It refers to the blade structure installed in front of the windshield, consisting of the motor, reducer, four-bar linkage mechanism, wiper arm spindle, wiper blade assembly, etc. Its main function is to remove rain, snow, and dust that obstruct the view on the windshield.