What Causes Loud Noises from Car Wiper Blades?
2 Answers
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.
The other day, I was driving to the supermarket, and the squeaky noise from the wipers gave me a headache. Experience told me it was probably due to worn-out wiper blades, especially since the rubber had hardened like stone. Normally, when driving, the wiper blades rub against the glass, and if there’s tree sap or grease on it, they can make a lot of noise. I always remind my friends to regularly check and clean their windshield with some glass cleaner—it saves a lot of trouble. Wiper blades should be replaced every six months or so; otherwise, they won’t clear the rain properly during heavy downpours, which can dangerously blur your vision. I once had a situation on the highway where the wiper blades completely failed, forcing me to pull over in a panic. Spending a little on new blades is much cheaper than towing fees, so I recommend making a habit of checking them.
