Wiper Drive Composition

1. Composition and working principle: Electric wipers are mainly composed of DC motors, worm gear boxes, cranks, connecting rods, swing rods and wiper blades. The normal motor and worm gear box are combined into one to form the wiper motor assembly. The crank, connecting rod, swing rod and other rods convert the rotation of the worm gear into the reciprocating swing of the swing arm, so that the wiper blade on the swing arm realizes the wiper action. The power source of the wiper comes from the electric motor, which is the core of the entire wiper system. It generally uses a DC permanent magnet motor. The wiper motor adopts a 3-brush structure to facilitate speed changes. The intermittent time is controlled by the intermittent relay, which uses the return switch contact of the motor and the charge and discharge function of the relay's resistance and capacitance to make the wiper sweep according to a certain period. The wiper blade strip is a tool that directly removes rainwater an…