DESIGN 2 -- SCOOTER PLATFROM
2017. 06
The purpose of this project is to design a platform for a scooter with the following constraints:
1. The platform should be able to hold an user with 200lb weight.
2. The width of the platform should be no longer than 15cm.
3. The bottom surface of the platform should be 3 cm above the ground.
4. The distance between two pins of the platorms is 60 cm with wheels having diameter of 20cm.
5. The deformation of the platform should be no more than 0.3cm.
6. The factor of safety should be ata least 3 or higher.
The purpose of this project is to design a platform for a scooter with the following constraints:
1. The platform should be able to hold an user with 200lb weight.
2. The width of the platform should be no longer than 15cm.
3. The bottom surface of the platform should be 3 cm above the ground.
4. The distance between two pins of the platorms is 60 cm with wheels having diameter of 20cm.
5. The deformation of the platform should be no more than 0.3cm.
6. The factor of safety should be ata least 3 or higher.
DESIGN
1. Material: 6061-T6 Aluminum
This material is relatively light in weight and strong. It is considered as one of the most common materials used in high quality scooter platform on the market. The final weight of the product is about 1.4 kg.
1. Material: 6061-T6 Aluminum
This material is relatively light in weight and strong. It is considered as one of the most common materials used in high quality scooter platform on the market. The final weight of the product is about 1.4 kg.
2. Dimension:
Length: 55.075cm
Width: 10.160cm
Thickness: 2.5cm
The pins of the rear wheels locate 4.5cm above the platform to ensure the bottom surface of the platform is 3cm above the ground.
3. Shape:
The shape of the platform is similar to a rectangular shape, in order to make the platform lighter, some materials at the bottom surface are removed. The front face is trimed down to a traingular shape with edges flatened to increase the safety level of the platform. This way does not only make the product lighter and safer, but also increase the overall look of thein product, which is more appealing and better in appearance.
Length: 55.075cm
Width: 10.160cm
Thickness: 2.5cm
The pins of the rear wheels locate 4.5cm above the platform to ensure the bottom surface of the platform is 3cm above the ground.
3. Shape:
The shape of the platform is similar to a rectangular shape, in order to make the platform lighter, some materials at the bottom surface are removed. The front face is trimed down to a traingular shape with edges flatened to increase the safety level of the platform. This way does not only make the product lighter and safer, but also increase the overall look of thein product, which is more appealing and better in appearance.
4. Simulation:
It is assumed that the foot is a US9.5 men size and is located in the middle of the platform when performing. The testing results include the deformation, stress, and the factor of safety. The results are shown below in figures.
1) Stress Distribution: 4.971*10^7 N/M^2 Maximum
2) Factor of Safety: 5.5
3) Displacement (Deformation): 0.6104mm Maximum
4) Rectangular Simulation:
The block with the same weight and cross-sectional area.
a) Stress Distribution: 5.620*10^7 N/M^2 Maximum
b) Factor of Safety: 4.9
c) Displacement (Deformation): 1.294mm Maximum
c) Displacement (Deformation): 1.294mm Maximum
The simulation shows that the scooter platform performs better than the rectangular shape platform with the same weight. The analysis shows that the scooter platform deforms less than the rectangular shape platform under the same weight. The platform has higher factor of safety than the rectangular shape platform, which informs that the platform is safer to use being able to bear heavier weights.