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Design Innovation

Synthesis of Rectilinear Motion Generating Spatial Mechanism With Application to Automotive Suspension

[+] Author and Article Information
Jing-Shan Zhao1

Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, P.R.C.jingshanzhao@mail.tsinghua.edu.cn

Fulei Chu, Zhi-Jing Feng

Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, P.R.C.

1

Corresponding author.

J. Mech. Des 130(6), 065001 (Apr 16, 2008) (8 pages) doi:10.1115/1.2901157 History: Received March 19, 2007; Revised August 16, 2007; Published April 16, 2008

This paper proposes a synthesis method for rectilinear motion generating spatial mechanism with application to automotive suspension. First, it presents a generic process to synthesize the kinematic chains of a mechanism with the prescribed mobility, and then it deduces the construction criteria of feasible kinematic chains for such a mechanism. The most outstanding advantages of the rectilinear motion generating spatial mechanism used as the independent automotive suspension are that the orientation and position parameters such as kingpin, caster, camber, axis distance, and wheel track are always maintained constant during jounce and rebound. These ideal characteristics are guaranteed by the particular rigid guidance mechanism whose end effector only has one translation along an exact straight line.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Structure of Peaucellier–Lipkin eight-link Linkage

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Figure 2

A spatial six-link mechanism with a atraight line translational end effector

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Figure 3

A spatial six-link mechanism with the best structure stability

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Figure 4

The structure of sarrus linkage

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Figure 5

Configuration of the spatial seven-link mechanism

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Figure 6

Top view of the spatial six-link mechanism

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Figure 7

Configuration of the spatial six-link mechanism where the end-effector CD reaches the lower limitation

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Figure 8

Equivalent mechanism of the spatial six-link mechanism shown in Fig. 3

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Figure 9

A front suspension and a rear suspension

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