Cylindrical gearbox - heading for machine parts and design basis

Contents

TASK

1 KINEMATIC AND POWER CALCULATION OF DRIVE

2. CALCULATION OF GEARS

2.1 CALCULATION OF CYLINDRICAL TRANSMISSION

2.2. CALCULATION OF CHAIN TRANSMISSION

3. SHAFT CALCULATION AND DESIGN

4. CALCULATION OF KEY CONNECTIONS

5. CALCULATION AND DESIGN OF BEARING ASSEMBLIES

6. DESIGN OF BODY PARTS, MACHINES AND COVERS

7. LUBRICATION OF ENGAGEMENT

8. COUPLING SELECTION

9. SELECTION OF FITS

10. GEARBOX ASSEMBLY AND ADJUSTMENT

LIST OF LITERATURE USED

Gearbox assembly

Prior to assembly, inner cavity of reducer housing is thoroughly cleaned and covered with oil paint.

Assembly is performed in accordance with gearbox assembly drawing starting from shaft assemblies.

Ball bearings pre-heated in oil to 80... 100 0C are put on the driving shaft.

Keys are laid on driven shaft and gear wheel is pressed until stop against shaft collar, then spacer bushing is put on and ball bearings, previously heated in oil, are installed. The assembled shafts are laid in the base of the reduction gear case and the cover of the case is put on, having previously covered the surface of the joint of the cover and the case with alcohol varnish. For alignment, the cover is installed on the housing with the help of two conical pins, bolts are tightened, which attach the cover to the housing. After that, spacer rings are put on the driven shaft, solidol is put into bearing chambers of the cover, bearing covers with a set of metal gaskets for adjustment are placed.

Then the shafts turn, there is no clamping of bearings (the shafts must be rotated by hand) and attach the covers with screws. Then plug is screwed in oil of drain hole with gasket and oil indicator is installed.

Oil is poured into the housing and the inspection hole is closed with a cover with a gasket made of technical cardboard, the cover is bolted .

The assembled gearbox is rolled and tested on the bench according to the program established by the operating specification.