A Dependent Suspension Using Inclined Leaf Springs

Abstract

The invention relates to a non-independent suspension adopting oblique leaf springs and belongs to the technical field of automotive engineering. The suspension comprises a frame, integral axles and two suspension devices on two sides of the frame, wherein each suspension device comprises four oblique leaf springs, axle connecting components, a wheel and frame connecting components, the first oblique leaf spring and the fourth oblique leaf spring are symmetrical about the axle, and the second oblique leaf spring and the third oblique leaf spring are symmetrical about the axle, and an intersecting line of longitudinal symmetric center surfaces determined by the first oblique leaf spring and the fourth oblique leaf spring is parallel to or collinear with an intersecting line of longitudinal symmetric center surfaces determined by the second oblique leaf spring and the third oblique leaf spring. The non-independent suspension is simple in structure and reasonable in arrangement; four parallel leaf springs can more effectively bear and buffer impact; compared with a conventional longitudinal leaf spring suspension, the suspension adopting the oblique leaf springs has excellent bearing capability and reliability, the positional parameter variable quantity of wheels can be reduced, the bearing center distance of the two sides is increased, the wheel steering range is increased, and a whole automobile has better low-speed flexibility.

Description

technical field [0001] The invention relates to a suspension applied to a vehicle, in particular to a non-independent suspension of a heavy-duty vehicle using leaf springs, and belongs to the technical field of automobile engineering. Background technique [0002] Automobile suspension is a general term for related devices that ensure that there is an elastic connection between the wheel (or axle) and the frame (or body) and can transmit loads, ease shocks, attenuate vibrations, and adjust the position of the car body during driving. The suspension directly determines the operating stability and driving stability of the car, and is an important part of the car chassis. Suspension can generally be divided into non-independent suspension, independent suspension and semi-independent suspension. The structural feature of the non-independent suspension is that the wheels on both sides are connected by an integral axle, and the wheels and the axle are integrally connected with th...

AI Technical Summary

Problems solved by technology

[0003] At present, the suspensions used by commercial vehicles are all non-independent leaf spring suspensions. The suspension includes a bridge and multiple leaf springs on both sides of the frame. The leaf springs are arranged longitudinally along the frame, and one end of the leaf spring is hinged to the frame. The other end is hinged to the frame through a swing rod, and the axle is fixedly connected to the middle of the leaf springs on both sides through suspension rings and other components. It has the following disadvantages: 1) Due to the asymmetrical structure of the longitudinal leaf springs with respect to the axle, the vehicle is in the process of driving. , the deformation of the leaf spring under load leads to a wide range of wheel positioning parameters, which is not conducive to the stability of the vehicle operation, and the abnormal wear of the wheel is serious; 2) The vertical multi-leaf spring is essentially a series structure. , which will lead to the failure of the entire suspension, and its reliability is poor; 3) The lateral distance of the vertical leaf springs on both sides of the frame is the bearing center distance. In order to improve the anti-rolling ability of the vehicle, the bearing center distance must be increased , resulting in a decrease in the lateral distance between the wheel and the frame or the steering rod, which may lead to structural interference and further reduce the steering range of the wheel. On the contrary, increasing the steering range of the wheel will reduce the bearing center distance, and the vehicle can resist roll Reduced ability

However, the suspension involved in the above-mentioned patented technology is essentially an independent suspension, and its bearing capacity is limited; moreover, the leaf spring is a multi-leaf composite leaf spring, which has high requirements for the processing and assembly process of the leaf spring. Once some of the parts fail, it may In addition, the connecting end of the leaf spring and the steering knuckle adopts the structural design of the embedded slot hole, which allows the leaf spring to move in the slot hole, which will easily cause serious wear and tear on the contact part of the leaf spring and the steering knuckle during the beating process of the wheel. Under extreme loads, there may even be accidents where the leaf spring falls out of the slot and the wheel falls off sideways, so the load-bearing capacity and reliability of the suspension need to be further improved

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