Differential Gear Box

A PPT on Differential Gearbox. In this presentation we tried to explain about Differential Gearbox.

1. SUSHILA DEVI BANSAL COLLEGE OF TECHNOLOGY,INDORE MINOR PROJECT : - design and analysis DIFFERENTIAL GEAR BOX SUBMITTED BY :- KULDEEP GAURAV SURYA PRATAP vijay ,BRIJESH Submitted to :- MR. Sanjay KULKARNI SIR DR. ANKUR GEETE SIR MR. SIDdHARTH SIR Mechanical department Guidance by:- Mr. Shrikant shukla sir

2. CONTENTS INTRODUCTION OBJECTIVE PARTS OF DIFFERENTIAL SYSTEM WORKING OF DIFFERENTIAL DIFFERENT CASES FUNCTIONS OF DIFFERENTIAL DRAWBACK OF STANDARD DIFFERENTIAL TYPES OF DIFFERENTIAL GANTT CHART

3. INTRODUCTION Differential is an essential part of any four wheeled vehicle. A differential allows wheels of a vehicle to rotate at different speeds. This is necessary when the vehicle turns.

4. OBJECTIVE PHASE 1 To study the differential and working in a vehicle. To study gear terminology. PHASE 2 Design of whole differential system. Design of different parts on sheet and CAD software with the help of ANSYS software. Assembly of differential in CAD software. Fabrication.

5. PARTS OF DIFFERENTIAL SYSTEM Pinion drive gear :- Transfer power from the drive shaft to the ring gear. Ring gear :- Will transfer power to differential case assembly. Spider gear :- Gear lies at the heart of differential and special mention should be made about its rotation. Differential case assembly:- Hold the gear and drive the axel. Rear drive axel:- Transfer torque from differential assembly to drive wheels.

6. WORKING OF DIFFERENTIAL While taking turn, the inner and outer wheels have different turning radius. The inner wheel travel less distance. From the drive shaft power is transferred to pinion gear first, since pinion and ring gear are meshed , power flow to the ring gear. As the spider gear is connected with the ring gear, power flows to it. At last power from spider gear gets transferred to both side gears.

7. DIFFERENT CASES THE VEHICLE MOVES STRAIGHT In the case the spider gear rotates along with the ring gear but does not rotate on its own axis. So the spider gear will push and make the side gears turn and both will turn at the same speed.

8. VEHICLE TAKES A TURN RIGHT In this along with the rotation of the ring gear its rotates on its own axis. So the spider gear having a combined rotation. When the spider gear is spinning as well as rotating peripheral velocity at the left side of spider gear is the sum of the spinning and the rotational velocity But the right side it is the difference of the two since the spin velocity is in the opposite direction at this side.

9. OTHER FUNCTION OF DIFFERENTIAL First is the speed reduction at the pinion ring gear assembly. Since the power flow at the pinion and ring are the same such a speed reduction will result in a high torque multiplication. Can also note one speciality of the ring gear, they are hypoid gear have more contact area compared to the other gear pairs. The other function of the differential is to turn the power flow direction by 90 degree.

10. DRAWBACK OF STANDARD DIFFERENTIAL It is not working in the situation where one of the rear wheel having a good traction and other having a slippery surface.

11. DESIGN PARAMETERS Input parameters:- Input power Input speed Input torque Max weight of vehicle Distribution of weight at front and rear axle Gear ratio

12. FORCE ACTING TO ROTATE SPIDER GEAR The centrifugal and centripetal force are required to turn the spider gear in anti clockwise while taking right turn and vice-versa

13. WHAT HAPPEN IN THE DIFFERENTIAL IN DIFFERENT TURNING RADIUS ? At different turning radius, the speed of outer wheel will vary as compare to inner wheel. For Example:- turning radius of inner wheel = 5 meters turning radius of outer wheel = 6 meters The distance travel by inner wheel is circumference of inner circle = 2*pi*r => 2*3.14*5=> 31.41 meters The distance travel by outer wheel is circumference of outer circle=2*pi*R=>2*3.141*6=> 37.692 meters Therefore, the relation between two wheels speed = 37.692/31.41=> 1.2 So , we can say that outer wheel is 1.2 times faster than inner wheel at this turning radius.

14. GANTT CHART

15. TYPES OF DIFFERENTIAL 1. Open differential 2. Limited slip differential a. Clutch LSD b. Viscous Coupling LSD c. Locking LSD d. Torsion LSD

16. THANK YOU