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📘 A small motor starts the motion

A windshield wiper begins with an electric motor powered by the vehicle battery.

3
lessons
~15 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. From motor to sweepUnderstand how a motor, reduction gears, crank, and linkage create a controlled sweep.The motor supplies fast rotation, gearing trades speed for torque, and an offset crank with connected links converts that rotation into oscillating motion at the wiper pivots.
  2. From linkage to clear glassUnderstand how arms, springs, blades, and pressure keep contact with curved glass.The arm and spring carry and press a flexible rubber edge, while blade curvature and linkage geometry shape the cleaned zone and manage friction.
  3. Control, reversal, and parkingUnderstand how timing, linkage geometry, and a park switch control reversal and rest position.The motor can turn continuously while the linkage reverses the arms mechanically. Controllers schedule intermittent cycles, and a park switch lets the blades finish at their resting position.

Questions this course answers

Why does a wiper motor use reduction gearing?

The motor spins quickly, while the wiper needs slower, stronger motion against resistance.

Match each part to its main job.

The arm, rubber, linkage, and spring divide the work of maintaining motion and contact.

Complete the sentence about parking.

The park reference lets the motor finish a partial sweep and stop the blades in the intended location.

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