Plate end soft fixed monolithic composite material leaf spring suspension structure

Abstract

The invention relates to a rear suspension mechanism for commercial vehicles, in particular to a rear axle suspension mechanism for commercial vehicles such as trucks and passenger cars. The rear suspension mechanism is characterized in that longitudinal composite material variable section plate springs are arranged on the left side and the right side of a rear axle respectively, two ends of the plate springs are softly fixed, the characteristics of a buffering block elastic body are improved, a buffering block has the effects of an auxiliary spring, buffering and limitation, a V-shaped propelling rod and a variable-section longitudinal propelling rod are adopted, and longitudinal and horizontal acting force and torque of the vehicles are effectively controlled. The mechanism is long in service life and does not need to be replaced within about 350000 km, the service life requirements of the whole vehicles are met; the smoothness is good, the mechanism is equal to an air suspension in smoothness; the weight of the mechanism is 1 / 4 to 1 / 3 that of a steel plate spring; part strength is adjusted, and the mechanism is suitable for serving as a rear suspension for heavy commercial vehicles, medium commercial vehicles and light commercial vehicles. According to the mechanism, not only are the problems of poor smoothness, short service lives and large weight of steel plate spring suspensions solved, but also the problems that the air suspension is short in service life and needs auxiliary devices such as a compressor, an air cylinder and a valve are solved, and the problem that an existing rear suspension is short in service life is also solved.

Description

technical field [0001] The invention belongs to the rear suspension structure of a commercial vehicle. Background technique [0002] With the improvement of roads, customers have higher and higher requirements for ride comfort and comfort. At the same time, customers have higher and higher requirements for the reliability of chassis components in order to reduce the cost of vehicle use. [0003] At present, the rear suspensions of commercial vehicles mainly include leaf spring rear suspension and air spring rear suspension. The frame adopts variable cross-section leaf spring suspension, and the vehicle with high ride comfort requirements adopts air spring suspension. [0004] The existing leaf spring rear suspension mechanism is widely used in various commercial vehicle rear suspensions due to its simple structure, low unit cost, easy manufacture, and self-guiding function, but it has poor ride comfort, high quality, and short life. The cost of using the whole vehicle is r...

AI Technical Summary

Problems solved by technology

[0004] The existing leaf spring rear suspension mechanism is widely used in various commercial vehicle rear suspensions due to its simple structure, low unit cost, easy manufacture, and self-guiding function, but it has poor ride comfort, high quality, and short life. The cost of using the whole vehicle is higher

[0005] Although the air suspension has good smoothness, it must provide stable compressed air from compressors, valves, punching bags, etc., and height sensors are also required. There are many accessories and complex structures. At the same time, the service life is not long. A good air spring only It can be guaranteed for 5 years, and it cannot meet the life requirements of the whole vehicle

[0006] At present, the suspension buffer blocks are mostly rubber components, which are low in cost and easy to produce, but there is little room for change in shape and performance. When subjected to a large impact, they are easy to crack and have a short life.

[0007] Therefore, neither the leaf spring suspension nor the air spring suspension can meet the structural cost and smoothness requirements of commercial vehicles at the same time, and the service life is relatively short.

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