ARAI, Pune. 16th June, 2007

BAJA SAEINDIA TEAM MEGA WORKSHOP

ARAI, Pune. 16th June, 2007

M&M Transmission

Construction & Working

Presented ByPravin Kulkarni

Manager-R&D 3W, M&M

ARAI, Pune. 16th June, 2007

M&M Transmission-Construction M & M Transmission is a compact transmission having

following major aggregates which are integral part of transmission:-

1. Clutch

2. Gear box

3. Differential

Contd.

ARAI, Pune. 16th June, 2007

Differential

Gear Box Clutch

Schematic Layout of M&M Transmission

EngineCrank Shaft

ARAI, Pune. 16th June, 2007

M&M Transmission-Construction1. Clutch

Type : Oil Wet Multi-plateFriction plates : 5 Nos.Pressure plate : 4 Nos.Outer plate : 1 No.

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-ConstructionClutch consists of following major parts:-

1. Clutch Box2. Engine gear3. Clutch shaft4. Friction plates5. Pressure plates6. Outer plate7. Clutch spring, etc.

Contd.

ARAI, Pune. 16th June, 2007

Clutch

Schematic Layout of Clutch

ARAI, Pune. 16th June, 2007

M&M Transmission-Construction2. Gear Box

Type : Constant Mesh TypeGear Ratios : 4 Forward & 1 ReverseForward : 1st 31.48, 2nd 18.70, 3rd

11.40, 4th 7.35Reverse : 55.08 Type of gears : Helical & Spur

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-ConstructionGear Box consists of following Major parts:-

1. Transmission casing2. Lay-shaft / Cluster gear3. Main shaft4. Speed Gears5. Idler gear for reverse 6. Reverse gear7. Gear shift lever8. Reverse gear lever

Contd.

ARAI, Pune. 16th June, 2007

Gear Box

Schematic Layout of Gear Box

ARAI, Pune. 16th June, 2007

M&M Transmission-Construction2. Differential

Type : Integral with Gear Box with built in universal joints

Type of gears used : Spur & Bevel

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-ConstructionDifferential consists of following Major parts:-

1. Final Drive gear2. Differential casing3. Sun gear4. Satellite gear5. Slider block 6. Propeller shaft

Contd.

ARAI, Pune. 16th June, 2007

Differential

Schematic Layout of Differential

ARAI, Pune. 16th June, 2007

M&M Transmission-Working M & M Transmission working can be split again into

three major aggregates level which are integral part of transmission:-

1. Clutch

2. Gear box

3. Differential

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-Working Working of clutch:-

The clutch is engaged by operating clutch lever thus by pushing clutch box resulting in relaxation in friction plate clamping force. The friction plates starts rotating and torque will be transmitted.

This will stop further torque transmission from engine to gear box.

As soon as the clutch lever is released the clutch gets disengaged thus resulting in torque transmission.

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-Working Working of Gear Box:-

The torque is transmitted through engine gear to cluster / lay shaft wherein the speed gears are constantly meshed. The appropriate gear can be selected by using gear selecting mechanism.

The gear box can also be engaged in reverse resulting in reverse action on propeller shaft

Contd.

ARAI, Pune. 16th June, 2007

M&M Transmission-Working Working of Differential:-

The drive received from main shaft by engaging an appropriate gear is then transferred to FD gear.

FD gear is fitted with differential cage with sun gear & satellite gear inside the differential cage

Then the torque is transmitted to propeller shaft through sun gear.

Contd.

ARAI, Pune. 16th June, 2007

Thank You.

BAJA SAEINDIA TEAM MEGA WORKSHOPM&M Transmission Construction & Working