What Causes Loud Noises from Car Wiper Blades?

[DelMolly]

Car wiper blades produce loud noises due to: 1. Aging of the wiper blades themselves; 2. Presence of foreign objects between the wiper blades and the windshield; 3. Oil film on the windshield; 4. Deformation of the wiper arm. The function of wiper blades is to sweep away raindrops and dust attached to the vehicle's windshield, improving the driver's visibility and enhancing driving safety. Wiper blades use a DC permanent magnet motor, and the wiper motor installed on the front windshield is generally integrated with the worm gear mechanical part. The worm gear mechanism serves to reduce speed and increase torque, with the output shaft driving a four-bar linkage mechanism that converts continuous rotary motion into left-right oscillating motion.