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A vehicle transverse leaf spring suspension system with continuous stiffness adjustment

A leaf spring suspension, transverse technology, applied in the field of vehicle suspension system, can solve the problems of limited ability to improve ride comfort, expensive actuators, multi-energy, etc., to meet ride comfort requirements, and the control method is simple and efficient , the effect of low cost

Active Publication Date: 2020-11-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two methods are passive and step-by-step adjustments, which have limited ability to improve the ride comfort of the vehicle
Although the third method can achieve continuous adjustment of stiffness, it needs to maintain the dynamic force continuously, consumes more energy, and the price of the actuator is relatively expensive.

Method used

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  • A vehicle transverse leaf spring suspension system with continuous stiffness adjustment
  • A vehicle transverse leaf spring suspension system with continuous stiffness adjustment
  • A vehicle transverse leaf spring suspension system with continuous stiffness adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A certain type of 7-seat SUV vehicle suspension system of the present invention is used.

[0060] The structural parameters of the suspension adjustment system are as follows: the elastic modulus of the transverse leaf spring is E=420GPa, the section moment of inertia I=5×10 -9 m 4 , The cantilever adjustment range is 550mm-750mm. According to formula (2), its stiffness adjustment range is 29800N / m-75700N / m. The lead of the bidirectional lead screw 9 is 2 mm, the number of teeth of the driving gear 10 is 19, the number of teeth of the driven gear 11 is 67, and the transmission ratio is 3.53. The power of the driving motor 12 is 400w, the rated torque is 1.27Nm, and the rated speed is 3000rpm.

[0061] Under the initial conditions, when only the driver is seated, the passenger mass is calculated as 75Kg, and the sprung mass m 1 It is 1385Kg. Suspension default initial stiffness K 1 It is 31150N / m, calculated according to the formula (2), the cantilever length of th...

Embodiment 2

[0068] Use certain type 12 MPV vehicle suspension system of the present invention.

[0069] The structural parameters of the suspension adjustment system are as follows: the elastic modulus of the transverse leaf spring is E=420GPa, the section moment of inertia I=1.37×10 -8 m 4 , The cantilever adjustment range is 400mm-750mm. According to formula (2), its stiffness adjustment range is 82000N / m-540000N / m. The lead of bidirectional lead screw 9 is 2 mm, the number of teeth of driving gear 10 is 17, the number of teeth of driven gear 11 is 73, and transmission ratio is 4.29. The driving motor 12 has a power of 750w, a rated torque of 2.39Nm, and a rated speed of 3000rpm.

[0070] Under the initial conditions, when only the driver is seated, the passenger mass is calculated as 75Kg, and the sprung mass m 1 It is 1695Kg. Suspension default initial stiffness K 1 is 88900N / m, calculated according to formula (2), the cantilever length of leaf spring is 730mm at this time. Acc...

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Abstract

The invention relates to an automobile transverse plate spring suspension system with the function of rigidity continuous adjusting. The automobile transverse plate spring suspension system comprisesa pair of upper supports, a pair of lower supports and a transverse plate spring. A rigidity continuous adjusting mechanism is arranged on the transverse plate spring and comprises a pair of variabledamping shock absorbers, a drive motor, a transmission mechanism and a pair of pulley mechanisms. The transmission mechanism comprises a bidirectional lead screw and a pair of gears. The rotating directions of lead screw threads on the two sides of the bidirectional lead screw are opposite. Each pulley mechanism comprises an upper guide pulley, a lower guide pulley and a pulley seat. The upper guide pulleys and the lower guide pulleys form an up-and-down clamping state on an upper support cross beam and the transverse plate spring. During work, the drive motor drives the pair of pulley mechanisms through the transmission mechanism to do constant-speed same-direction or opposite linear movement, the bending deformation degree of the transverse plate spring is adjusted, and therefore the rigidity of the transverse plate spring is adjusted. The rigidity continuous adjusting mechanism adopts common transmission parts, the control manner is simple and efficient, the structure is compact, the size is small, the cost is low, and operation is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension systems, and in particular relates to an automobile transverse leaf spring suspension system. Background technique [0002] When the number of passengers of a passenger vehicle changes, the sprung mass changes greatly, and the rigidity of the elastic element of the traditional vehicle suspension is fixed and cannot be adjusted. The change of bias frequency and damping ratio caused by mass change will have a great impact on vehicle ride comfort. The existing leaf spring stiffness adjustment methods include: 1. Multi-stage leaf springs, so that the number of contact leaf springs is different when the vehicle is unloaded and fully loaded; An electric system adjusts the position of the contact points of the leaf springs. The first two methods are passive and step-by-step adjustments, and have limited ability to improve the ride comfort of the vehicle. Although the third method can realiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60G11/02
CPCB60G11/02B60G2202/11B60G2204/40
Inventor 郑敏毅陈桐刘鹏飞张农朱波罗亮
Owner HEFEI UNIV OF TECH
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