机械设计双语版

Emphases★：
Concept of Machine、Mechanism、
Element 、Link
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1.1
Study Object
1.2
1.3 1.4
Several Concepts About This Course
Study Content Purpose Summary and kernel
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1.1
Study Object
Machinery(机械)—— Machine(机器) and Mechanism(机构):
What is Machine? For example:
Lathe
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Numerical-controlled Lathe
B1ackHawk Helicopter
the 5th of Divine Boat
The link moves along with the driving member. 机架(Frame)——机构中相对不动的构件 The link is fixed with respect to the moving links within a mechanism.
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1.3 Study Content
3 4
Slider-crank mechanism 曲柄滑块机构
Gear mechanism 齿轮机构
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Cam mechanism 凸轮机构
3、Composition of machine In terms of basic manufacturing unit, a machine is composed by machine elements/components(零 件/构件). In terms of the functions of the sub-system of a machine, it is comprised of the source-power（原 动机）, transmission（传动部分）, execution and control/manipulation parts（执行控制/操作部分）. For the convenience of kinematic or dynamic analysis of a machine, a machine can be decomposed into mechanisms.
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第8页
1.2 Several Concepts About This Course
Link（构件） Machine Element (零件) Driving Member (主动件)——输入构件 Driven Member (从动件)——输出构件 Frame (机架)
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Link(构件)——运动单元 The Basic Element in Kinematics Analysis.
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Summary and kernel
Machine Mechanism Link
Machine Element
Frame Driving Member Driven Member
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Chapter 1
End
Return to section contents Return to chapter contents
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1 —— Cylinder (缸体) 2 —— Piston (活塞) 3 ——Coupler (连杆) 4 —— Crank (曲柄) 4'—— Pinion (小齿轮) 4"—— Flywheel(飞轮) 5 ——Gear (大齿轮) 5'—— Inlet cam(进气凸轮) 5''——Outlet cam(排气凸轮) 6 —— Inlet valve(进气阀) 7 —— Outlet valve(排气阀)
Machine Element(零件)——制造单元 The Basic Element of Manufacture.
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主动件(Driving Member)——输入构件 The link on which the driving force or torque acts.
从动件(Driven Member)——输出构件
Analysis (分析)and synthesis（综合） ——most content of the lesson Structural Analysis Analysis
Kinematic Analysis
Dynamics Analysis
Synthesis is the process of determining only the kinematics dimensions of a mechanism required to produce a particular motion.
Chapter1
Introduction
This chapter mainly introduces the study objects and contents of the course, the basic requirements and procedure in the mechanisms design.
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1.4
Purpose
It is hoped that, after studying this textbook, the student will grasp the basic theory and obtain the basic knowledge and skills needed in mechanisms synthesis and kinematic and dynamic analysis of machinery. The knowledge to be obtained from this textbook is therefore fundamental in analyzing existing machines and designing new ones.
Single-cylinder Four-stroke Internal Combustion Engine
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1、Definition of Machine A machine is a combination of mechanisms and other components that transforms, transmits, or uses energy, load, or motion for a specific purpose. A machine is a combination of components which can transmit power in a controlled manner by converting energy from one form to another and eventually producing useful work.
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2、What is Mechanism?
Mechanism is a basic system of links (构件) which can transform or transmit force and motion. Examples of Mechanism：
1
2
5 1 4'
5' 1 6