Full course design "Cylindrical gearbox"

Contents

1. Motor selection and motor kinematic calculation

2. Worm Gear Calculation with Cylindrical Worm

2.1. Selection of materials and allowable stresses

2.2. Worm Gear Calculation

2.3. Worm Gear Strength Check Calculations

2.4. Worm Gear Settings

2.5. Forces in engagement

2.6. Worm Shaft Stiffness Calculation

2.7. Thermal calculation of worm gear box

3. Calculation of belt transmission

4. Preliminary calculations and sketching

gearbox main elements

4.1. Preliminary calculation of shafts

4.2. Preselection of bearings

4.3. Calculation and design of the main components of the housing

5. Verification calculations

5.1 Definition of Reactions and Construction of Bending Epics

and torques

5.2. Check calculation of bearings for durability

5.3. Check calculation of keys

5.4. Check calculation of shafts for fatigue strength

6. Coupling selection

7. Reduction gear box lubrication

Literature

2 Calculation of worm gear with cylindrical worm

Worm gears are calculated for strength by contact stresses with subsequent check of worm wheel teeth for bending as less strong compared to worm turns. In addition, after determining the dimensions of the housing, a thermal calculation of the worm gear is carried out, as well as a check calculation of the worm shaft for stiffness.

2.3 Worm Gear Strength Check Calculations

Performed on contact and bending stresses for worm wheel as weakest link

.