What is the purpose of the car control arm?

The automobile control arm (also called the swing arm), as the guiding and force transmission element of the automobile suspension system, transmits various forces acting on the wheels to the body, and at the same time ensures that the wheels move according to a certain trajectory. The vehicle control arm elastically connects the wheel and the body together through ball joints or bushings, respectively. The automobile control arm (including the bushing and ball joint connected to it) should have sufficient rigidity, strength and service life.

Structure of automobile control arm

1. Stabilizer link
When the suspension is installed, one end of the stabilizer bar link is connected to the stabilizer bar through a rubber bush, and the other end is connected to the control arm or the barrel shock absorber through a rubber bush or ball joint. The stabilizer bar link is symmetrical in the selection. Use, its role in improving operational stability.

2. Tie rod
When the suspension is installed, the rubber bushing at one end of the tie rod is connected with the frame or the body, and the rubber bushing at the other section is connected with the wheel hub. This type of control arm is mostly used in the multi-link suspension of the automobile and the tie rod of the steering system, which mainly bears the lateral load and guides the wheel movement at the same time.

3. Tie rod
Tie rods are mostly used for drag-type suspensions to transmit traction and braking force.

4. Single control arm
Such automotive control arms are mostly used in multi-link suspensions, where two single control arms are used together to transmit lateral and longitudinal loads from the wheels.

5. Fork (V) arm
This type of vehicle control arm is mostly used for the upper and lower arms of the double wishbone independent suspension or the lower arm of the McPherson suspension, and the fork structure of the arm body mainly transmits lateral loads.

6. Triangle arm
This type of car control arm is mostly used in the lower arm of the front suspension McPherson suspension to transmit lateral and longitudinal loads and control the relative movement of the wheel and the body.