Automechanical Works Paper 2 WASSCE (SC), 2016

Question 11

 

        

          

The sketch above shows the sectional view of a final drive. Use it to answer the following questions.

  1. Name the parts labelled V, W, X, Y and Z.
  2. State three forces acting on the half-shaft.
  3. Name the wheel in the differential unit to which the half shaft is fixed.
  4. State the location of the bearing in a semi-floating axle shaft support.
  5. How is the half-shaft inner end fitted to the differential unit?

Observation

 


    Solution

     (a)         
V: Cage                                         Y: Sun wheel
W: Half shaft                                 Z: Crown wheel
X: Bearing


(b)  Forces Acting on Half Shaft

  • Shear force due the weight of the vehicle
  • Bending force due to the weight of the vehicle
  • Torsional force due to the torques generated by driving and brake application
  • Side thrust forces when cornering

                                                                                                     
(c)  The Wheel in the Differential Unit to Which the Half-Shaft is Fixed
Sun wheel                                                                                              

   (d) The Location of the Bearing in a Semi-Floating Axle Shaft Support
It is fitted directly on the half-shaft                                                         

   (e) How the Inner End of the Half-Shaft is Fitted to the Differential Unit
By splinning