Gearbox calculation -PU, Drawings

Contents

Terms of Reference

Introduction

1. Kinematic calculation of the drive

1.1 Selection of electric motor

1.2 Refinement of drive gear ratios

1.3 Determination of rotation speeds and torque on shafts

2. Calculation of cylindrical transmission of the first stage

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 Design calculation

2.4.1 Axial distance

2.4.2 Preliminary main wheel dimensions

2.4.3 Transmission Module

2.4.4 Total number of teeth and inclination angle

2.4.5 Number of gear and wheel teeth

2.4.6 Actual gear ratio

2.4.7 Wheel diameters

2.4.8 Dimensions of blanks

2.4.9 Check of wheel teeth by contact stresses

2.4.10 Forces in engagement

3. Calculation of the second stage cylindrical transmission

3.1 Choice of hardness, heat treatment and wheel material

3.2 Determination of allowable contact stresses

3.3 Determination of bending stresses

3.4 Design calculation

3.4.1 Axial distance

3.4.2 Preliminary main wheel dimensions

3.4.3 Transmission Module

3.4.4 Total number of teeth and inclination angle

3.4.5 Number of gear and wheel teeth

3.4.6 Actual gear ratio

3.4.7 Wheel diameters

3.4.8 Dimensions of blanks

3.4.9 Check of wheel teeth by contact stresses

3.4.10 Forces in engagement

4. Sketched Design

4.1 Design calculations of shafts

4.2 Distance between gear parts

4.3 Selection of Bearing Types

4.4 Bearing Installation Diagrams

4.5 Drawing Up of Layout Diagram

5. First Stage Gear Design

5.1 Gear

5.2 Gear Wheel

6. Design of gears of the second stage

6.1 Gear

6.2 Gear Wheel

7. Selection of keyways

7.1 Selection of key for connection of gear wheel and intermediate shaft

7.2 Selection of key for connection of gear wheel and output shaft

7.3 Selection of input and output shank keys

8. Selection of rolling bearings for assigned service life

8.1 High-speed shaft bearings

8.2 Intermediate shaft bearings

8.3 Low-speed shaft bearings

9. Shell Part Design

10. Design of Bearing Covers

11. Calculation of shafts for strength

11.1 Input shaft

11.2 Intermediate shaft

11.3 Output shaft

12. Selection of cuff seals

12.1 Input shaft

12.2 Intermediate shaft

12.3 Output shaft

13. Selection of lubricants and lubrication system

14. Calculation of couplings

15. Procedure of actuator assembly, execution of required adjustment works

List of used literature

4.3 Selection of Bearing Types

Ball radial bearings are most often used to support shafts of spur and helical gears of gears and gearboxes. Initially, light series bearings are assigned. If the bearing load capacity is insufficient in the subsequent calculation, the middle series bearings shall be accepted. With excessively large sizes of ball bearings, conical roller bearings are used as supports of shafts of cylindrical wheels. [1, p. 47]

We pre-assign ball radial bearings of light series.

Typically, precision class 0 bearings are used. Bearings of higher accuracy are used for shaft supports requiring increased rotation accuracy or operating at particularly high rotation frequencies. [1, p. 47]