What is the rear connection rod of a car
The rear connecting rod of a car usually refers to the connecting rod structure in the rear suspension system, mainly serving the following functions:
Support the vehicle body
The rear connecting rod (or rear tie rod) is connected to the vehicle body at one end and to the rear axle or suspension system at the other end, providing basic structural support for the vehicle and ensuring driving stability.
Control wheel positioning
By adjusting the shape and position of the connecting rod, parameters such as the wheel's tilt Angle and toe-in Angle can be precisely controlled, thereby optimizing the vehicle's handling and stability during straight-line driving, turning and braking.
Absorb road surface impact
The connecting rod can effectively buffer the vibration and impact from the road surface, reduce the discomfort of passengers, and at the same time lower the vehicle noise and vibration.
If a vehicle adopts a multi-link structure (such as a rear multi-link independent suspension), it usually includes a combination of longitudinal tie rods and transverse link rods, further optimizing the wheel movement trajectory and vehicle comfort.
The rear connecting rod of a car (usually referring to the rear tie rod) is an important component of the rear suspension system, and its main functions are as follows:
Support the vehicle body
One end of the rear tie rod is connected to the vehicle body, and the other end is linked to the rear axle or suspension system, providing basic structural support for the vehicle and ensuring driving stability.
Control wheel positioning
By adjusting the shape and position of the rear tie rod, parameters such as the wheel's tilt Angle and toe-in Angle can be precisely controlled, optimizing the stability during straight driving, turning and braking.
Absorb shock
During driving, the rear tie rod can buffer the impact of the road surface, reduce damage to passengers and the vehicle, and at the same time lower noise and vibration.
Lateral stability
The rear tie rods (such as the anti-roll bars) of some models can also reduce the lateral roll of the vehicle body when turning, improving the smoothness of driving.
The failure of the rear connection rod of a car is usually manifested as the following symptoms:
Power decline and abnormal noise
Damage to the rear connecting rod may lead to a decrease in engine power output and abnormal noise during operation. If it is a hydraulic connecting rod, there may be a squeaking sound caused by insufficient lubrication. If it is a solid connecting rod, metal friction sounds may occur due to deformation or fracture.
Driving vibration and increased fuel consumption
A faulty connecting rod can affect the vehicle's balance, intensify driving vibration, and may also be accompanied by an increase in fuel consumption. In severe cases, it can cause difficulty in starting or prevent the engine from starting.
Abnormal direction control
Damage to the rear connecting rod may cause an increase in the steering wheel clearance when stationary, inaccurate direction guidance during driving, especially with obvious swaying at specific speeds.
Inspection and maintenance suggestions
If the above symptoms occur, it is necessary to check the deformation, cracks or loosening of the connecting rods in a timely manner. Slight deformation can be corrected by professional equipment, while severe damage requires the replacement of new parts. If cracks are caused by metal fatigue or repeated stress, they must be replaced immediately to ensure driving safety.
Based on the user's question "The rear connection rod of the car is broken", combined with the existing information, the analysis is as follows:
Fault manifestations
Youdaoplaceholder0 Abnormal noise : A thumping sound occurs while driving, and it is more obvious when the rear wheels are shaken left and right:
Youdaoplaceholder0 Abnormal control : inaccurate directivity, obvious directional swing at a specific speed
Youdaoplaceholder0 Loose chassis : when stationary, there is a large clearance when turning the steering wheel, and the wheels have a perceptible sense of looseness
Youdaoplaceholder0 Decreased stability : The body roll intensifies when cornering, and the tracking performance of the rear wheels deteriorates
Cause of damage
Youdaoplaceholder0 Aging and wear : Cracking of the rubber bushing leads to an increase in the gap of the connecting rod (commonly seen in vehicles over 5 years old)
Youdaoplaceholder0 Impact damage : Long-term driving on bumpy roads causes metal fatigue or deformation
Youdaoplaceholder0 Poor lubrication : Abnormal wear of the ball joint of the connecting rod due to lack of oil
Improper installation of : failure to press the bushing in accordance with the specifications during maintenance leads to early damage
Repair advice
Youdaoplaceholder0 inspection method : Shake the rear wheel forcefully with both hands and observe whether the bushing of the connecting rod displaces more than 3mm
Youdaoplaceholder0 Replacement points :
Special tools should be used to press the bushing to avoid violent knocking
After installation, four-wheel alignment adjustment parameters are required
It is recommended to replace the left and right side bushings in pairs
Youdaoplaceholder0 Emergency handling : If a metallic clanging sound is heard, speed should be reduced immediately (it is recommended to be less than 60km/h)
The relevant components affect
The damage of the rear connecting rod will have a related impact: rear axle positioning parameters, tire eccentric wear, shock absorber load
Note: Actual maintenance should be determined in combination with the specific structure of the vehicle model. The above content is applicable to most MacPherson rear suspension models. If it is a multi-link suspension, more link assemblies may be involved .
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