Clever car front axle design can make light trucks

by:FUSAI     2020-05-26

The light trucks and light trucks we produce have many advantages, and they are more in line with the Chinese characteristics of the industry and national conditions. Light trucks use relatively low production costs and low-profit operating methods of production and introduce advanced automotive technology. The characteristics of low one high, focus on product quality, so that it can be improved in the competition in the automotive industry. 

The manufacturing process of light vehicles is simple, the price is cheap, and the price of four-wheeled vehicles is less than 50,000 yuan. Now we must have advanced design theory to develop light vehicles, and optimize the design to make the products novel. The front axle is an important component of a car. It includes a driven axle, a knuckle, a kingpin, a brake, etc. The ingenious design of the front axle helps the car to drive on the highway quickly and smoothly. 

The basic structure and function of the front axle are composed of the following parts: (1) Knuckle pin (master pin): It is an important part that affects the performance of the entire vehicle. The main pin has a stop groove, and the pin lock bolt fixes the main pin in the main pin hole of the front axle through the stop groove, so that it cannot rotate or move axially. (2) Knuckle: The knuckle is the main steering part on the front axle. It uses the main pin and the front axle to be hinged and supports the hub assembly through a pair of hub bearings to achieve the steering function. (3) Brake assembly: It is the main component to realize wheel braking, and there are two forms of oil brake and air brake. When the vehicle light truck front axle assembly implements a braking command, the brake friction plate expands and contacts the inner working surface of the brake drum to generate frictional force to achieve vehicle braking. The choice of the front axle brake is very critical. If it is not selected properly, there will be many problems such as front and rear braking force mismatch and braking force not meeting the requirements. (4) Wheel hub combination: mainly installed on the steering knuckle through two rolling bearings, driving the wheels to rotate. At the same time, it forms a friction pair with the friction plate to realize the braking of the wheels. (5) Articulated arm: It is divided into straight rod arm and transverse rod arm, which are respectively connected to the straight rod assembly and the transverse rod assembly. Forming steering mechanism and steering trapezoidal mechanism. The steering mechanism is used to complete the steering of the vehicle. The steering trapezoid determines whether the internal and external turning angles of the vehicle are reasonable. (6) Tie rod assembly: It is the main component to adjust the toe. The shaft is made of seamless steel tube, and the joint assembly of spherical articulated structure at both ends. It is installed on the tie rod arm after threading. The shaft is adjustable to facilitate the adjustment of the toe. 

The positioning parameters of the front axle are to ensure the straightness of the vehicle, the automatic return of the steering wheel when it encounters external forces, and the ease of handling. Generally, cars require a kingpin angle, a kingpin angle, a camber angle, and a wheel front bundle. These four parameters are wheel positioning parameters. 1) Kingpin angle: in the vertical vertical plane, the angle at which the upper part of the kingpin tilts backward is called the kingpin angle. Some of this caster angle is reflected on the front axle, and some is reflected on the leaf spring. Generally about 1.5 ° ~ 3 °. Its main function is to form a stable torque for the wheel to return to the correct position, keeping the vehicle running in a straight line, without The left and right swings due to external force. 2) Kingpin inclination angle: In the transverse vertical plane, the angle at which the upper end of the kingpin axis inclines toward the inside of the vehicle is the kingpin inclination angle. It is determined by the structure of the front axle, and no adjustment is needed in use. The range generally does not exceed 8 °. The camber angle of the kingpin also has the effect of automatically returning the wheels to the correct position. At the same time, the inclination angle of the kingpin also reduces the offset distance of the kingpin Small, making steering light. But if the pin offset is too small, it will increase the friction between the tire and the road, the stepped steering is heavy, and the tire wear is accelerated. 3) The camber angle of the wheel: it means that the longitudinal rolling center plane of the wheel is equivalent to the upper camber angle of the vertical vertical plane. It is the assembly angle of the knuckle and the front axle after assembly, generally around 1 °. Its main function is to avoid the serious inclination of the wheels caused by the deformation of the front axle after the vehicle is fully loaded. This will accelerate the wheel Partial wear of the tire. In addition, the camber angle of the wheels can also be adapted to the arched road surface. However, if the camber angle of the wheels is too large, the tires will also suffer from partial wear. 4) Toe: the distance between the rear end of the left and right front wheels-the distance between the front end of the left and right front wheels is the toe value. It is mainly adjusted by changing the length of the tie rod. Usually in the range of 0 ~ 4. It can eliminate the adverse effect of the front end of the wheel spreading out due to the camber angle of the car during driving.                                

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