Mechanical-sub team

From UBC Wiki

Mechanical Design

Overview of the mechanical sub-system

Functions

The clothes dryer allows heat and airflow to dry the clothes efficiently and evenly.

Objective

Designing a functioning drum drive which is the main component of the dryer for the dryer.

Constraints

- Limited equipment

- Tight timeline

- The drum volume must be greater or equal to 0.5L 3.4

- The clothes dryer must dry the 0.5 L of clothes within 1 hour

The Design

Drum Size

The scale of the drum with the capacity of 0.5 L

The drum volume is approximately 0.5L. The diagram below shows the basic design of the drum (front and back rings are attached). The drum is designed to dry a small piece of clothing in a short time. It is also decided to rotate at a desired speed. The scale of the drum drive with the volume of 30cm^2. The final design for mechanical parts

Drive System and Motor Support

A pulley which will provide a tension to prevent the belt from slipping

A motor will be used for the drum drive to provide rotation. The mounting position of the motor will be on the outside of the drum, on the bottom panel. Additional support will be built to support the motor. A bracket is used to secure the motor from slipping. Two pulleys will be used. The first pulley (figure 6) is called the drive pulley, which would be used to drive the drum. It is attached at the front of the motor. The second pulley (figure 7) is the tension pulley, which will be used to provide tension for the belt and prevent it from slipping. The tension pulley is placed next to the motor, and it has a base support that is attached on the bottom panel. Figure 4 and 5 are two design alternatives for the connection of the two pulleys. The final design is as shown in figure 5: the two pulleys are connected in a zig zag direction so that the tension pulley can provide sufficient tension for the belt. The belt will first go around the drum, through the drive pulley and the tension pulley.

A motor and its mounting
A pulley used to drive a drum

Temperature and Humidity Sensor

The extra feature will be attached to the backboard of the drum. Extra screw holes will be designed as well.

This sensor will help determine how long the dryer should last.
The overlook of the all the components