Multi-connecting-rod rectilinear movement hanger bracket adopting ball spline pair

Abstract

The invention relates to a multi-connecting-rod rectilinear movement hanger bracket adopting a ball spline pair. The multi-connecting-rod rectilinear movement hanger bracket comprises a spring shock absorber, wheels, a vehicle body, a steering knuckle, an upper-side first hanger bracket branched chain, an upper-sided second hanger bracket branched chain, a lower-side first hanger bracket branched chain and a lower-side second hanger bracket branched chain, wherein the spring shock absorber is hinged with the steering knuckle and the vehicle body respectively, the steering knuckle is matched with the wheels by wheel hub units, and the two ends of each hanger bracket branched chain are respectively hinged with the steering knuckle and the vehicle body. The multi-connecting-rod rectilinear movement hanger bracket has the advantages that the positional parameters such as the camber angle, the kingpin inclination angle and the caster angle of the wheels, the toe-in (toe-out) of the front wheel, the distance between the left wheel and the right wheel, and the distance between a front shaft and a rear shaft can be kept constant during the process that the wheels jump up and down, so that the abrasion of the tires is lowered greatly, and the operation stability, the driving smoothness and the riding comfort of the vehicle can be improved effectively; the hanger bracket branched chains are simple in structure, the ball spline pair can be changed after being abraded, and the service lives of the hanger bracket branched chains are prolonged.

Description

technical field [0001] The invention relates to an automobile suspension system, in particular to a multi-link linear translation suspension adopting a ball spline pair. Background technique [0002] Suspension is a general term for devices that ensure the elastic connection between the wheel or axle and the vehicle's load-carrying system (frame or load-bearing body) and can transmit loads, ease shocks, attenuate vibrations, and adjust the position of the vehicle body during driving. Generally, the suspension is mainly composed of three parts: elastic elements, shock absorbers and guide mechanisms. In some cases, a certain component plays two or three roles, such as a leaf spring that also acts as an elastic element and a guiding mechanism. The function of the guide mechanism is to ensure reliable transmission of all forces and moments between the wheel and the body or frame, and to determine the displacement characteristics of the wheel relative to the body or frame. The ...

AI Technical Summary

Problems solved by technology

In the above patent [1], the suspension branch chain is an RPR kinematic chain, which has good stiffness in all directions, but the RPR kinematic chain has a large sliding friction at the moving pair due to the existence of the moving pair, so it is not suitable for use as a suspension guiding mechanism ; In [2], the branch chains of the suspension are all RRR kinematic chains, and the stiffness along the direction perpendicular to the plane determined by the RRR kinematic chain is relatively poor, and there are many hinge kinematic pairs; the branch chains of the suspension in [3] are all elastic Multi-link, the stiffness of the guide mechanism along the longitudinal direction of the wheel is relatively poor, when the guide mechanism jumps up and down to the limit position, the elastic rod may have a sudden movement; and there are high requirements for the elasticity, strength and toughness of the guide rod composite material

Therefore, the practicability of the above three kinds of suspension guide rods is not strong, and continuous improvement is needed

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