Hello everyone.... Today I will show you what is inside of a different type of Wiper motor.
#technology #whatisinside #WiperMotor
The wiper motor assembly isn’t just a motor, and consists of many different components. These include the motor itself, gear mechanism, connectors, switch, and more. Here is a list of the main parts of a wiper motor including their specific functions.
DC Motor:-----
The heart of motor vehicle windshield wipers is a DC motor, which can be rated 6V, 12V, or 24V. Most motors are run off a 12V source, while a few are rated 6V and 24V. The parts of the motor include the following.
Housing- made from steel, the wiper motor housing encloses and protects the parts inside. It’s often coated to prevent corrosion.
Magnet- the windshield wiper’s motor today contains permanent magnets. These are usually attached to the inside of the housing using adhesive. Their function is to provide the magnetic force required to rotate the armature. Older wiper motors used electromagnets/field magnets instead of permanent magnets
Armature- the armature is the rotating centre piece. It consists of a coil of copper wire would around a magnetic core and resting on a shaft. The shaft spins freely, with a small bearing at the end for a smooth rotation.
Brushes- the wiper motor brushes provide the path through which current is conducted to the armature coil so the motor can rotate. Modern car wiper motors come equipped with 3 brushes. The third brush completes a high speed circuit and enables the wipers to operate at different speeds.
Commutator- the commutator is the rotating part that sits between the brushes and is held in place by the motor shaft. It contains a series of conductive segments separated by insulating strips. The segments conduct current from the brushes to the coil in turns, enabling the continuous rotation of the armature.
Gearbox:----
The wiper motor gearbox is the housing that contains the gears and other parts required by the motor to perform its function. The parts reduce the speed of rotation, multiply torque, and transmit motion to the wiper linkage parts such as wiper arms and rods. The components that make the assembly are:
Worm gear- the end of the wiper motor shaft is a worm a spiral gear that rotates a gear wheel. Together, the two gears form a worm drive and help to multiply torque through gear reduction. The arrangement also slows down the overall speed of rotation.
Gear Wheel- this is the wiper motor gear that connects to the spiral gear to multiply torque. When the spiral gear rotates, the gear wheel also turns, but at a slower speed. That way, it multiplies the force of rotation to a level enough to move the wiper parts or wiper linkage. Depending on the specific model of the motor, there may be an additional gear or gears.
Parking limit switch- just above the output wheel gear is the wiper park switch consisting of three copper arms attached to the gear box cover. These ride on a conductive ring mounted on a plastic wheel. The wheel, in turn, is attached to and rotates together with the ring gear.
The wiper motor park switch provides power to the motor when you switch off the wipers until the blades move to the park position. This prevents the wipers from stopping on the windshield and obstructing your view when driving.
Gear box cover- this is the removable part that covers the wiper motor gearbox assembly. Apart from protecting the parts inside, the cover also holds parts of the parking limit switch. It also contains the electric connector that supplies power and signals to the electronic components.
Output shaft- the output shaft is attached to the gear mechanism. It helps transmit the wiper motor gear rotation to the outside, thereby helping to move the wiper transmission linkage. In a rear or back wiper motor, the shaft drives the wiping blade directly.
Output arm- the wiper motor arm is the crank that mounts on the output shaft. It connects the parts of a wiper motor to the rest of the system, moving rods and other linkages. The output arm function is to convert the rotary motion of the motor to the linear motion required to operate the wipers.
Connectors- the wiper connectors are electrical wires or components that convey power and electronic signals to the wiper motor assembly parts. It forms part of the wiper motor wiring and is one of the most crucial components. When broken or worn, the motor may not run.
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8 сен 2024
