Graduation Design (Dissertation) of Wuhan University of Technology

MPV hand brake arm assembly design and components finite element analysis

College: International Education College

Specialty amp; Class: Automobile GJ 1401

Student Name: Lesheng LI

Tutor: Xiaohe Deng

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Abstract

This article first elaborated the research status of the domestic handbrake arm assembly, introduced the background of the subject and the purpose and requirements of the product design of the handbrake arm assembly. On this basis, a solution to the quality problem of the handbrake arm assembly is proposed. The structure and working principle of the handbrake arm assembly product are introduced, and the performance and mechanical properties of the dynamic analysis are analyzed. Under the premise of satisfying the requirements of the current design specification, an overall research plan has been put forward. This program has always been the subject of research, based on finite element analysis, and the design of the hand brake arm assembly. At present, both of your studies are at home and abroad. The study is not yet comprehensive.

This thesis takes the handbrake of a Wuling Hongguang model as its prototype, designs the structure and size parameters of the handbrake arm assembly, according to the vehicle parameters, compares the research procedures of the design manual and the mechanical manual and other reliable data, and the hand brake arm assembly The installation location has also undergone some improvements. After completing the three-dimensional modeling of the handbrake arm assembly, in order to avoid the interference in movement and many unreasonable dimensions, the paper carried out the necessary dynamic analysis. The establishment of a finite element model for a reasonable three-dimensional model to complete the motion analysis includes the grid division, material selection, and assembly constraints. The paper puts a load on the handbrake arm, which is the arm pull force and the braking force of the body, and analyzes the stress and strain conditions of the loaded parts. Finally, according to the finite element analysis results of different parts, the paper gave some suggestions for improvement, and made drawing drawings of assembly drawings and drawings of some parts drawings.

Key Words：Wuling Hongguang、Hand brake arm assembly、Motion Analysis、elastic vibration analysis

Content

I. Introduction 1

1.1 Analysis of Research Status at Home and Abroad 1

1.2 Purpose and significance 2

1.3 Basic content and technical solutions: 3

1.3.1 Basic content 3

1.3.2 Goals 4

1.3.3 Technical Solution 4

II. Design Principles and Design Scheme Analysis 6

2.1 Design specification requirements 6

2.1.1 Quality requirements for longitudinal conditions 6

2.1.2 Quality Requirements for Lateral Operating Conditions 8

2.2 The overall design of the hand brake arm 8

2.2.1 Installation Arrangement and Space Requirements 8

2.2.2 Design Plan 9

III.Calculation of parameters 11

3.1 model parameters 11

3.2 Determination of joystick parameters 12

3.3 tooth plate parameter determination 14

3.4 Checking slope performance 15

3.4.1 limit slope angle 15

3.4.2 handle force check 17

3.5 brake handle stroke calculation 18

IV. Three-dimensional design 19

4.1 Three-dimensional structure 19

4.1.1 Supporting device 19

4.1.2 Carrying device 20

4.1.3 Locking mechanism 22

4.1.4 Suspension device 23

4.2 The establishment of three-dimensional model of hand brake arm assembly 24

V. Motion Simulation 26

5.1 Movement Simulation Platform Selection 26

5.2 Connections of Parts 26

5.3 Exercise 26

VI. Finite element analysis 29

6.1 Hand brake arm assembly analysis content 29

6.2 Unit Type Determination and Meshing 29

6.3 Determination of material model 30

6.4 Finite Element Analysis 31

6.4.1 Establishment of Finite Element Model 31

6.4.2 Selection of Relationships Between Components 32