Theory of Machines

4

MECHANISMS WITH LOWER PAIRS

Chapter Outline

4.1 Introduction

4.2 Pantograph

4.3 Straight Line Motion Mechanisms

4.3.1 Accurate Straight Line Motion Mechanisms

4.3.2 Approximate Straight Line Motion Mechanisms

4.4 Intermittent Motion Mechanisms

4.5 Parallel Linkages

4.6 Engine Pressure Indicators

4.6.1 Types of Indicators

4.7 Automobile Steering Gear Mechanisms

4.7.1 Fundamental Equation for Correct Steering

4.7.2 Steering Gears

4.8 Hooke’s Joint or Universal Coupling

4.8.1 Velocities of Shafts

4.8.2 Angular Acceleration of Driven Shaft

4.9 Double Hooke’s Joint

4.1 INTRODUCTION

The lower pairs are those which have surface contact between them. We study, in this chapter, the various mechanisms for the generation of straight line motion, both ...