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*The integration of the lever spring of the new car body and the angle of the front wheel

Posted by: AutoMotive 2021-10-22 Comments Off on *The integration of the lever spring of the new car body and the angle of the front wheel

The front wheel camber angle is determined according to the vehicle’s own weight and load capacity, and generally does not need to be adjusted. The front suspension of the T815-2 car is a torsion bar spring and a hydraulic cylinder shock absorber. Due to parts and installation errors, as well as the fatigue deformation of the torsion bar, the camber angle of the front wheel will change, so it needs to be adjusted according to the situation.

Torsion bar spring The tension bar spring of the T815-2 automobile is a torsion bar with a length of 1900mm, a diameter of 56mm, a circular cross-section, and trapezoidal splines at both ends. The torsion bar material is 45CrNiMoV-A high-grade alloy spring steel, which is processed by mechanical processing, multiple pre-twisting, heat treatment, surface treatment and other processes, and then outsourcing epoxy resin and anti-rust paint.

After the above treatment, the metal fiber structure inside the torsion bar material produces elastic deformation to the left or right to reserve elasticity. During installation, the front end of the torsion bar is splined with the torsion bar swing arm, the front end of the swing arm is hung from the front half sleeve with double-hole lugs, and the rear end of the tie rod is fixed to the frame by splines.

When the car is running, when the front wheel jumps up, the impact force passes through the front axle sleeve → lug → torsion bar arm, thereby twisting the torsion bar, and pre-stored elasticity of the torsion bar prevents the wheel from jumping up. This process causes the upward impact and torsion of the wheel The elastic force of the rod is offset, thereby damping the vibration.

It should be pointed out that due to the directionality of the pre-torsion during the manufacturing process of the torsion bar, the directionality of the torsion bar installation is determined, and the torsion bar spring can only play the role of damping when the wheel bounces up, so the torsion bar spring should be combined with the reduction Use the vibrator together.

T815-2 car front wheel camber adjustment The structure and principle of the front suspension of all T815-2 cars are similar, but the adjustment data is different for different models. The following is described with T815-2SV2.

T815-2 car front suspension is not difficult to see from the picture, in the case of other parameters have been determined, the front wheel camber angle only depends on the “h” value. For the T815-2SVS2 model, the front wheel camber angle is 3°30′±40′, and the corresponding “h” value is 322mm. We can adjust the front wheel camber angle by adjusting the “h” value. The steps are as follows: (1) Fix the car and remove the hanger; (2) Adjust the half shaft so that the “h” value is 322mm; (3) Measure the “a” value, and choose different specifications of lifting lugs according to the a value: a value range/mm used lifting lug No. 106~1222122~1383138~1544154~1705 Among them, the center distance of No. 2, 3, 4, 5 lugs are 112mm, 128mm, 144mm, 160mm respectively. If the measured a value is not in this range, the torsion bar should be turned in the corresponding direction Turn a tooth.

(4) After the assembly is completed, put down the half axle, move the car by the distance of one wheel, and measure the front wheel camber. “The difference between the values ​​cannot be greater than 8mm.

In practical applications, the front wheel inclination caused by the fatigue deformation of the torsion bar will often break the torsion bar due to the increased load, causing losses, so timely adjustment is particularly important.

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