Course work on the discipline "Machine details," on the topic: "Design of the drive to the garage gate"

Contents

1. Terms of Reference

2. Introduction

3. Motor selection and kinematic calculation

4. Calculation of belt transmission

5. Gearing Calculation

6. Gearbox shaft design calculation

7. Gear Pair Design Dimensions

8. Structural dimensions of the gearbox housing and cover

9. First stage of gearbox arrangement

10. Keying and test calculation of keying connections

11. Second stage of gearbox sketching

12. Selection of bearings for gear box shafts

13. Check calculation of gear box shafts

14. Lubrication of the gear box engagement and bearings. Choice of oil grade and quantity

15. List of literature

Introduction

A reduction gear is a mechanism consisting of gear or worm gears, made in the form of a separate unit and serving to transfer rotation from the shaft of the engine to the shaft of the working machine. The kinematic drive circuit may include, in addition to the gearbox, open gears, chain or belt gears.

The purpose of the reduction gear is to reduce the angular speed and, accordingly, increase the torque of the driven shaft compared to the driving one. Mechanisms for increasing angular velocity, made in the form of separate aggregates, are called accelerators or multipliers.

The reduction gear consists of a body (cast iron or welded steel), in which the transmission elements are placed -- gears, shafts, bearings, etc. In some cases, a gear oil pump or a cooling device (for example, a coil with cooling water in the housing of the worm gear) is also placed in the reduction gear case.

Gearboxes are classified according to the following main features: gear type (toothed, worm or toothed); number of stages (single-stage, two-stage, etc.); to type of cogwheels (cylindrical, conic, konicheskotsilindrichesky, etc.); relative location of gear box shafts in space (horizontal, vertical); peculiarities of kinematic scheme (unfolded, coaxial, with bifurcated stage, etc.).

Planetary and wave reduction gears provide the possibility of obtaining large gear ratios at small dimensions.