The function of the rear wiper arm of a car
The main function of the rear wiper arm of a car is to transfer the power from the motor to the wiper blades. By swinging them, it removes rainwater or stains from the windshield, ensuring a clear view from behind for the driver.
Structure and Function
The wiper arm is connected to the vehicle body through a conical spline structure. Through mechanical transmission, the rotational motion of the motor is converted into reciprocating swing, enabling the wiper blade to closely adhere to the glass surface for cleaning. If the wiper arm is deformed or the connecting parts are worn out, it may lead to problems such as incomplete water scraping and abnormal noises.
Maintenance suggestions
Daily maintenance should avoid prolonged exposure to direct sunlight or severe cold environments. Regularly check if the dust cover is damaged and if the grease is sufficient. Adjust or replace components in a timely manner if any abnormalities are found.
The malfunction of the rear wiper arm of a car may be caused by the following reasons:
Common causes
Youdaoplaceholder0 wiper arm spring failure : The spring inside the wiper arm loses its elasticity, resulting in an inability to reset or swing normally.
Youdaoplaceholder0 Motor failure : The motor driving the wiper arm is damaged, which may result in insufficient power or inability to start.
Youdaoplaceholder0 The linkage mechanism is blocked : Dust accumulation or component wear causes the movement of the wiper arm to be hindered.
Youdaoplaceholder0 Poor contact : The contact surface between the wiper arm and the windshield is uneven, or there are foreign objects causing abnormal friction sounds.
Solution
Youdaoplaceholder0 Check the condition of the spring : if the spring is aged or deformed, adjust the tension or replace it with a new one.
Youdaoplaceholder0 Clean the interlocking mechanism : Remove dust and add lubricant. Replace parts if severely worn.
Youdaoplaceholder0 Check the motor and sensor : If the motor is abnormal or the sensor is faulty, professional maintenance or replacement is required.
Youdaoplaceholder0 Adjust the contact surface : Remove foreign objects from the contact surface to ensure a tight fit without any abnormal noise.
It is recommended to contact professional maintenance personnel to detect the specific fault point to avoid secondary damage caused by self-disassembly and assembly.
If the rear wiper arm of the car is damaged, it needs to be replaced in time. The specific solutions are as follows:
Replacement steps
Youdaoplaceholder0 remove the old wiper arm
Lift the wiper and cover it with a towel to prevent damage to the glass.
Pull out the wiper blade to the right to disengage the snap.
Remove the old wiper arm vertically downward, and be careful not to apply excessive force.
Youdaoplaceholder0 install the new wiper arm
Align the notch of the new wiper blade with the snap and apply a little force until you hear a locking sound.
Test the wiper effect to ensure it operates properly.
Troubleshooting Common Faults
If it still cannot be used after replacement, the following reasons may be involved:
Youdaoplaceholder0 rocker arm damage : The wiper blades and rocker arm assembly need to be replaced simultaneously (for some models, they need to be replaced as a set).
Youdaoplaceholder0 The screw won't turn : You can try turning it back and forth left and right or heating the screw (if soaking in a lighter or cola doesn't work, it is recommended to use a special tool).
Youdaoplaceholder0 Circuit issue : Check if the fuse, motor or control unit (ECU) is faulty.
It is recommended to give priority to referring to the vehicle model manual or professional maintenance tutorials to ensure standardized operation. If you have difficulty handling it yourself, it is recommended that you contact a professional for inspection and repair.
The rear wiper arm of the car is driven by a DC permanent magnet motor and, in conjunction with a four-bar linkage mechanism, achieves reciprocating motion. The specific working principle is as follows:
Power transmission
After the motor starts, the speed is reduced and the torque is increased through the worm gear and worm reduction mechanism, and the power is output to the four-bar linkage mechanism.
"Motion conversion"
The four-link mechanism converts the rotational motion into the left and right swing of the wiper arm, ensuring that the wiper blade adheres to the glass surface with a constant pressure to remove stains.
System reset
When the wipers are turned off, the system completes the current scraping cycle through the control module, resetting the wiper blades to their initial position (usually hidden under the taillights).
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
