Answered: from the department of Mechanical…

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter38: Manual Transmissions And Transaxles

Section: Chapter Questions

Problem 4RQ: Define the purpose of the final drive gears.

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Question

A team of engineers from the department of Mechanical engineering are task to design a hoist equipment using a reverted epicyclic gear train shown in Figure 1. The drum must be keyed at the centre of the arm E using the same shaft. The pinion gear A is keyed to a second shaft which carries a chain wheel. Whereas the chain must be operated by hand. The two shafts have a common axis but can rotate independently. The gear wheels B and C are compound and rotate together on a pin carried at the end of arm E. The gear wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth, respectively, with a module of 3mm. The wheels C and D have a module of 4 mm. 1. Draw the side view layout of the gear system to be designed. Clearly indicate the positions of all components. 2. Determine the number of teeth of wheel D 3. Make use of the tabular method to calculate the the number of teeth on wheel C when the speed of A is ten times the speed of arm E and both rotating in the same direction.

D.
C.
E -
B
Figure 1 Top view of a reverted epicyclic gear train:

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