# MEE Geared Lifting Unit

## 創新系統

The Geared Lifting Unit, "MEE", consists basically of a lifting mechanism made up of a gear train that allows the study of a single wheel, a single gear system and a double gear system, determining the speed ratio, mechanical advance and efficiency.

## 一般說明

The Geared Lifting Unit, "MEE", has been designed to study a simple lifting mechanism and its use to determine the speed ratio, its mechanical advantages and efficiency.

The unit is mounted on a metal structure with bearings that support the gear drive shafts. Four gears with different numbers of teeth are available, allowing the simulation of a single gear, a single gear system and a double gear system.

In addition, two interchangeable pulleys of different sizes are available to study their influence on lifting, from which different masses are suspended to observe how the efficiency of each gear system varies.

## 練習和指導練習

### 手册中包含的指导实践练习

1. Study of a simple lifting mechanism and its use to determine the velocity ratio, mechanical advantages and efficiency.
2. Use of pulleys and gears to simulate simple wheel and shaft, single gear and double gears.
3. Measurement of the linear displacement between the masses and comparison with the calculated valves.
4. Calculation of the minimum work to lift a load and the efficiency.