Gearbox

INTRODUCTION

Most vehicles have gearboxes, which mainly consist on coupling gears of different size that are meshed when the driver needs it.
The main objective of a gearbox is the use of the torque to obtain the maximum advantage of the energy supplied, either as torque or as angular velocity.
The sliding type gearbox, although used in heavy commercial vehicles, is rarely used in modern vehicles. Nevertheless, its basic design and operation are important, since it represents the fundamental sketch from which most modern gearboxes have been developed.
The Gearbox, “MCC”, consists on simple shafts and gears mechanism to get three gear ratios and reverse. It includes pulleys adjusted to the inlet and outlet shafts of the mechanism to generate the momentums that allow to determine the efforts generated. All the shafts rest on bearings so that they can reduce losses due to friction.

EXERCISES AND PRACTICAL POSSIBILITIES

1. Study of mechanism that represents a gearbox.
2. Measurement of the angular displacement at the input andmoutput of the gearbox and comparison with the theoretical values.
3. Determination of the minimum effort required at the input shaft to lift a series of loads.
4. Calculation of the efficiency for different ratios depending on the input torque.
5. Plot of characteristic curves.
6. Determination of the torque and speed ratio for different gears.