Answer to Question #197281 in Mechanical Engineering for Mhluri Chauke

Question

A Butchery at Western Cape requires a modularized trolley designed for 300 Kg maximum

load bearing capacity.

The information obtained is as follows:

I. The trolley will be shipped to the location using a drone that can lift 20 Kg maximum load

II. The drone has a standard box compartment measuring 1000 mm length, 600 mm width, and

300 mm depth.

(Assume the square meter weight of most 

solid flat sheets suitable for the trolley design is 3 Kg/m2

. Furthermore, assume the following

weights for materials that are available off the shelf: 

 Bearings: 200 g/bearing

 Rubberized wheel: 100 g/wheel

 Helical springs: 50 g/spring

 Cylindrical shaft: 20 g/mm diametral volume for 1000 mm length

 Standard trolley handle: 40 g

Answer 1

-> 5 solid flat sheets

->2 bearings per wheel,

4 wheels

Total of 8 bearings

->4 rubberised wheels

-> 4 helical springs

-> 2 cylindrical shafts

-> 2 trolley handles