Analysis of the rolling conveyor mechanism

Contents

INTRODUCTION

1 ASSIGNMENT FOR THE COURSE PROJECT

2 KINEMATIC EXAMINATION OF LEVER MECHANISM

2.1 Structural Analysis

2.2 Constructing plans for the provisions of the mechanism

2.3 Construction of speed plans

2.4 Build Acceleration Plan

3 SYNTHESIS OF CAM MECHANISM

4 SYNTHESIS OF GEAR MECHANISMS

4.1 Geometric calculation of transmission

4.2 Construction of wheel teeth profiles

CONCLUSION

LIST OF SOURCES USED

Summary

Analysis and synthesis of a flat mechanism, synthesis of gear engagement, dynamic synthesis of a cam mechanism: Course work on the theory of mechanisms and machines. - Chelyabinsk: FGAOU VO "YuurSU" (NIU), IODO, 2018, 29 p., bibliogram. list - 4 pages, 3 sheets of drawings A1.

Course work contains 29 pages of typewritten text, 3 tables, 5 ills. It consists of three sections.

The first section provides a structural and kinematic analysis of the mechanism.

In the second section, a dynamic synthesis of the cam mechanism was carried out. Cam profile is designed to satisfy the specified rocker motion law. All required geometric parameters are defined.

In the third section, a cylindrical involute gearing with tooth numbers Z1 = 12, Z2 = 36, module m = 8 is designed.

Introduction

The purpose of this course work is to design and study the mechanism of the swinging conveyor.

A mechanism is an artificially created system of bodies designed to convert the motion of one or more bodies into the required movements of other bodies. A kinematic pair is a connection of two contacting links that allows their relative movement. A kinematic chain is a connected system of links that form kinematic pairs between themselves. A simple kinematic chain is a chain in which each link enters no more than two kinematic pairs. A complex kinematic chain is a chain that has at least one link included in more than two kinematic pairs. A closed kinematic chain is a chain, each link of which enters at least two kinematic pairs. An open kinematic chain is a chain that has links that are included in only one kinematic pair. A machine unit is a device consisting of a machine engine, a working machine and a transmission mechanism. A motor machine is a machine in which one or another type of energy is converted into mechanical work at its output link. A working machine is such a machine that the mechanical work transferred to its input link from the engine is converted by its working member into the work necessary to perform the technological process for which the machine is designed. The transfer mechanism is used to convert the moment removed from the output link of the engine to the moment at the input link of the working machine (as a rule, this conversion goes towards an increase in the moment at the input link of the working machine). The reduced moment (force) which tends to accelerate the movement of the driving link is called the driving moment, and the reduced moment (force) which tends to slow the movement of the driving link is called the resistance moment.

Conclusion

During the course design process, structural and

kinematic analysis of the mechanism as a result of which linear and angular velocities were determined in 12 positions of the mechanism and acceleration of points and links of the mechanism for the control position by constructing speed plans and an acceleration plan.

Cylindrical involute gearing with teeth numbers Z1 = 12, Z2 = 36, module m = 8 mm is designed. The engagement drawing is completed.

Dynamic synthesis of the cam mechanism was carried out. Cam profile is designed to satisfy the specified rocker motion law. All required geometric parameters are defined. The drawing of the cam mechanism is made.