Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Differential and Rear Axle Drives, by Jeevan B M

3,832 views

Published on

A differential is a device capable of transmitting torque and rotation through three shafts, almost always used in one of two ways.
Rear axle drives are the drives which employed for the rear axle the spring take the weight of the body.

Published in: Automotive
  • Login to see the comments

Differential and Rear Axle Drives, by Jeevan B M

  1. 1. Presented by, JEEVAN B M USN- 4JC15MEE11 AUTOMOTIVE ELECTRONICS 1
  2. 2.  Introduction of differential drive  Construction of differential drive  Principle and working of differential drive  Functions of differential.  Rear axial drive  Types of rear axil drive  Advantages and disadvantages of rear axial drive  References AUTOMOTIVE ELECTRONICS 2
  3. 3.  A differential is a device capable of transmitting torque and rotation through three shafts, almost always used in one of two ways.  In one way, it receives one input and provides two outputs; this is found in most automobiles  A differential is used to allow the wheels to spin at different speeds  The function of the differential unit is to allow different speeds to the two wheels AUTOMOTIVE ELECTRONICS 3
  4. 4. AUTOMOTIVE ELECTRONICS 4 • When a car is moving along a bend in the road. Its inner wheel will be rotating at a speed lower than that of its outer wheel
  5. 5. AUTOMOTIVE ELECTRONICS 5
  6. 6. AUTOMOTIVE ELECTRONICS 6
  7. 7. AUTOMOTIVE ELECTRONICS 7  inner wheel axle has been stopped by hand. But the differential unit is still rotating. Thus the outer wheel can now rotate at a faster speed. A similar arrangement is made in the differential unit
  8. 8. AUTOMOTIVE ELECTRONICS 8 working of the differential
  9. 9. AUTOMOTIVE ELECTRONICS 9 At the time of straight road • During the vehicle runs straight, the wheels of the rear axle will be screened by the drive pinion through the ring gear differential case, wheel-wheel differential gear pinion shaft, side gear teeth is not spinning, remain to be drawn into the ring gear rotation. • Thus the spin on the wheel left and right alike At the time of turning • At the time of vehicle turning left prisoners left wheel is bigger than the right wheel. • If the differential case with the ring gear rotates the pinion will rotate on its axis and also the movement around the left side gear, so round the right hand side gear increases, the side where the number of revolutions of the gear which is 2 times round the ring gear.
  10. 10. AUTOMOTIVE ELECTRONICS 10 • Further reduces the rotations coming from the gear box before the same are passed on to the rear axles. • Changes the direction of axis of rotation of the power by 90o i.e. from being longitudinal to transverse direction. • To distribute power equally to both the rear driving axles when the tractor is moving in straight ahead direction. • To distribute the power as per requirement to the driving axles during turning.
  11. 11. AUTOMOTIVE ELECTRONICS 11  Rear axle drives are the drives which employed for the rear axle the spring take the weight of the body.  In most of the front engine rear wheel drive cars, rear axles are used for transmitting power from differential to driving wheels.  rear axle avoid bending load.
  12. 12. AUTOMOTIVE ELECTRONICS 12 • various forces and torques experienced by the rear axle  Torque reaction Driving trust(trust to be produced in the road due to humps) Weight of the body(cause bending movement in the axle shaft) The side way forces(moving along the curves)
  13. 13. AUTOMOTIVE ELECTRONICS 13 Many drives are used out of which two important ones are: 1. Hotchkiss drive. 2. Torque tube drive
  14. 14. AUTOMOTIVE ELECTRONICS 14
  15. 15.  In this case the springs besides the taking weight of the body, also take the torque reaction, driving thrust and the side thrust.  Due to torque reaction, the spring deflects as shown in figure thus torque reaction is taken up by the springs  To take up the braking torque the springs would deflect in the opposite direction. AUTOMOTIVE ELECTRONICS 15
  16. 16. AUTOMOTIVE ELECTRONICS 16 In this type spring takes body weight and side thrust only The torque reaction and driving thrust are taken by another member called torque tube
  17. 17. AUTOMOTIVE ELECTRONICS 17 Advantages:  Better handling in dry conditions.  More predictable steering in low traction condition(ie ice or gravel).  Less costly and easier maintenance.  Even weight distributions. Disadvantages:  More difficult to master.  Decreased interior space.  Increased weight • Higher purchase price
  18. 18. AUTOMOTIVE ELECTRONICS 18  Book of automotive mechanics by S SRINIVASAN  www.mlees-robotronics.in/home/robotics/differential-drive- mechanismDIfferential drive mechanism  Wikipedia- Differential(mechanism)  www.learnengineering.org/2014/05/working-of- differential.html  Book of automobile engineering by Dr. KIRPAL SINGH
  19. 19. AUTOMOTIVE ELECTRONICS 19

×