Course project for "DM and OK" "Cable drive"

Contents

Contents

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Introduction

1 Kinematic calculation

1.1 Electric motor selection

1.2 Refinement of drive gear ratios

1.3 Speed of drive shafts

1.4 Torque on drive shafts

2 Gearbox Gear Calculation

2.1 Choice of hardness, heat treatment and wheel material

2.2 Determination of allowable contact stresses

2.3 Determination of allowable bending stresses

2.4 Calculation of high-speed stage

2.5 Calculation of slow-moving stage

3 Development of draft design

3.1 Main Shaft Dimensions

3.2 Distances between transmission parts

4 Selection of low-speed shaft rolling bearings

4.1 Determination of support reactions

4.2 Selection of bearings

5 Calculation of low-speed shaft for strength

5.1 Determination of Internal Power Factors

5.2 Calculation of geometrical characteristics of hazardous sections of shaft

5.3 Calculation of shaft for static strength

5.4 Calculation of shaft for fatigue resistance

6. Lubrication selection

6.1 Type of lubrication of gears and bearings

6.2 Choice of oil grade

6.3 Oil level

List of sources used

Introduction

The task for the course project is: to design a cable drive.

To move goods in horizontal, vertical or any other direction, special machines are used - rope drive.

Drive drum 5 is driven by motor 1 through flat-belt gear 3 and reduction gear 2. Drum 5 is connected to output shaft of reduction gear 2 by coupling 4.

The course design contains a calculation explanatory note and three drawing sheets: one A1 sheet - gearbox assembly drawing; two sheets of A3 format - working drawings of shaft and gear wheel. A schedule has been drawn up for the assembly drawing.