Graduation Design (Dissertation) of Wuhan University of Technology

Structural design of pure electric independent drive recreational vehicle chassis

School: International Education Collage

Specialty amp; Class: Vehicle Engineering gj1304

Student name: Qi Ao

Tutor: Qin Xunpeng

Statement of Originality

I solemnly declare that the thesis I submit is a piece of writing I completed independently based on my own research under the guidance of my supervisor. Except for the quotations, this paper does not include any writings published or completed by other individuals or groups. I am fully aware that the legal consequences of this statement are borne by me.

Signature of the author: Qi Ao

Date: 5.30.2017

Copyright Letter of Authorization to The Dissertation

The author of this dissertation fully understands provisions stipulated by this school on keeping and using dissertations. The author agrees that the school can reserve and send photocopies and electronic versions of this thesis to relevant departments or institutions managing dissertations. This thesis can be read and borrowed. I hereby authorize excellent provincial institutions appraising bachelor dissertations to incorporate all or any part of this dissertation into relevant databases for retrieval, as well as to preserve and compile this dissertation by photocopying, scanning or reprinting it in a reduced format.

This dissertation is: 1. Confidential until(year) and then this authorization letter will apply. 囗

2. Non-confidential. 囗

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Signature of the author: Qi Ao Date: 5.30.2017

Signature of the tutor: Date:

Abstract

The chassis is the main structure of the pure electric independent drive recreational vehicle. Most parts of the electric vehicle have to rely on the chassis to be fixed and connected. The main part of it is bear the overall vehicle load, also is the key component of the entire electric recreational vehicle. Therefore, the chassis structure should have the enough yield strength and the ultimate limit stiffness. It should be complete with enough properties in response to external pressure generated when the corresponding dynamic characteristics, in order to reduce the vibration intensity of the vehicle. The main structure of performance directly determines the lateral stability performance of pure electric vehicles on the road surface, the steering wheel steering safety performance, and the internal passenger of the cab or the carriage ride comfort permanence on the uneven road conditions above.

The chassis system of the pure electric recreational vehicle and the traditional recreational vehicle is different from the other parts in addition to the engine, transmission and transmission system, the other parts of the chassis are approximately about the same. The main purpose of the chassis is to support all parts of the vehicle, such as the vehicle head, vehicle frame and vehicle carriage, and other components of the fixed vehicle, so as to form a whole integrated structure. At the same time, the electric energy in the power battery is transmitted to the motor controller, and the wheel is directly driven by the wheel hub motor to drive the vehicle forward.

First of all, this thesis adopt the parameter requirements of this subject and the prerequisite for reference of similar models under the calculating parameters of electric recreational vehicle chassis design independently, while the completion of the dimension type system requirements is related to the chassis structure. Then I have finished the 3D solid modeling and the assembly of various parts of the overall structure of the chassis with CATIA software, and then view of the effect on the overall structure of the appearance of a recreational vehicle chassis was modified, while the completion of the three-dimensional modeling into two-dimensional drawings of the operations, in order to determine the overall structure of pure electric vehicle chassis and the corresponding to the design drawings. By the end of the basic parameters on the vehicle chassis 3D models and 2D drawings of the control and research, it can be found and modified in the structure design flaw, and perfect chassis overall structure design plan, to ensure that the actual production can be successfully completed.

Keywords: pure electric vehicle chassis design; 3D modeling; parameter design

Contents

Chapter 1 Introduction 1

1.1 Introduce the basic structure of chassis 1

1.2 Chassis design principle 1

1.3 Three types of chassis selection 2

Chapter 2 Determine the main parameters of chassis 6

2.1 Determination of dimensional parameters 6

2.1.1 Overall dimension 6

2.1.2 Wheelbase 6

2.1.3 Front and rear track 7

2.1.4 Front and rear suspension 7

2.1.5 Ground clearance 8

2.1.6 Minimum turning radius 8

2.2 Determine the quality parameters 8

2.2.1 Complete vehicle kerb mass 8

2.2.2 Loading quality 9

2.2.3 Quality coefficient..........................................................................................................9

2.2.4 Axle load distribution......................................................................................................9