What is the working principle of car window glass lifting?
3 Answers
The working principle of car window glass lifting is: the switch controls the forward and reverse rotation of a small internal motor, which drives a cable to pull a slider fixed to the glass up and down. The maintenance methods for car window glass lifting are: 1. Regularly clean to keep the windows clean; 2. When the oil in the lifting mechanism is exhausted, remove the inner cover and add sufficient oil; 3. Spray oil on the window gears and apply maintenance agent to the rubber. The window is an important part of the entire car body, and according to the installation position of the glass, there are: front and rear windshields, side windows, and door windows. The methods for raising and lowering car windows are: 1. Press the switch and release the button when the window lowers to the desired position; 2. Lift the switch and release the button when the window rises to the desired position.
When it comes to power windows, it's essentially a compact electromechanical system at work. Take that button on the door panel for example - a simple press activates the window switch. This switch sends the command to the motor inside the door, which immediately starts rotating clockwise or counterclockwise with its built-in reduction gears. The motor's rotation drives a spool wound with steel cables that are connected to the window's bottom bracket. Much like reeling in a fishing line, the cables wind and unwind to make the window glass move up and down smoothly. The whole system includes pinch protection sensors that automatically stop operation if an obstacle is detected. The real genius lies in those hidden guide rails and channels within the door frame, ensuring the glass maintains perfect vertical alignment during operation and creates a watertight seal in rainy weather.
Having repaired car doors for over a decade, I can describe their structure with my eyes closed. The core mechanism is the cable winch system driven by the window motor. The motor's output shaft is equipped with a worm gear to reduce speed and increase pulling force. Both ends of the steel cable are fixed in the sliding grooves of an X-shaped cross arm - this scissor-type bracket converts rotational motion into linear up-down movement. The nylon sliders at the bottom edge of the glass are embedded in guide channels on the door's inner wall, preventing noise and absorbing shocks. Wiring passes through the door hinge area using flexible harnesses that won't snap despite repeated door openings. When window movement becomes jerky, it's usually due to dust accumulation in the tracks or cable misalignment - requiring door panel removal for track cleaning, a particularly common issue in older vehicles.
