mecanical locking lsd 3

7/23/2019 Mecanical Locking LSD 3

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Mechanical locking _Limited slip diferential

12/1/15

Prepared by Amit

Gosavi

Chevrolet Colorado _G80

Prepared by Amit Gosavi 1


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12/1/15

Mechanical locking Limited slipdiferential

Assembly _ Mechanical lockin !"#

$evel ear _ Constr%ction & 'orkin

Cl%tch "%b(assly _ Constr%ction &'orkin

)naement mechanism _ Const* &'orkin

Cam plate

act%ation+or,%e trans-er

.ih speedcondition

Advantaes &

#isadvantaes

1*

*

2*

*

*

5*

8*

*

Prepared by Amit Gosavi 2

Per-ormance comparison video

3*

Contains


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12/1/15 Prepared by Amit Gosavi

Comparison 'ith other vehicle

1 2 5

S.No.

Make Transmission

B. Ratio,Diferential

Engine

Price

14 5 ChevroletColorado

4 2 M* lockin ( !"# *5 !7#

9143 (92843

2 :ord ;aner *104 !"# *0 !


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AB $

C

Assembly _ Mechanical lockin !"#

Chevrolet Colorado _G80


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$evel ear set?("imilar to the conventionalopen di@erential there aret'o di@erential earslocated on cross sha-t &t'o side ears splined tothe ale sha-t*

+hese ears are precision-ored -or hih impact

strenth* Prepared by Amit Gosavi12/1/15

$evel ear _ Constr%ction & 'orkin

A

#i@ case

7Planet carrier

#i@erential Pinion

7Planet ear

"ide ear7"%n ear

$evel ear set 'ork onprinciple o-

planetary ear train*

5


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ne o- the side ear hascamramp machined onback -ace* +hese rampsprovides correspondinramp on cam plate*

Also there are three pin likedetents on cam plate &havin three hole on theback -ace o- the ear*

+hese detents avoidsrampin o- cam plate tillthe predetermined tor,%eis applied to the ear o-

cam plate*

Cl%tch "%bassembly _ Constr%ction

$

cam

ramp


1

2

#etents 7pins

#etent .ole


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leo- ramp helps to have aial movement o- cam plate in only onedirection*

1* Cam ramp enaes'ith the ramp s%r-aceo- the ear*

2* le o-the side ear*


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1* Cl%tch assembly?($ehind the cam platethere is a pack o- m%ltiple-riction discs 'hich arealternately splined 'ithdi@erential case & side

ears*

2* "imilar set o- disc packis provided on anotherside ear*

Cl%tch "%bassembly _ Constr%ction$


1

2

8


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Co%nter

'eiht

!ockin

pa'l

otch

)naement mechanism _ Constr%ctionC


1

2

!ay sha-t

3

!ay sha-t

Main

sha-t


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)naement mechanism _ BorkinC


Main sha-t ;PM D 100

C! Main sha-t

Main sha-t ;PM 7CCB E 100Main sha-t ;PM 7CB E 100

.*P*

C! Main sha-t

.*P*.*P*

1 2

Main sha-t assly is 'orkin on principle o- centri-%al overnor*

Main sha-t ;PM D 100 ?( Centri-%al -orce on the 'eiht is balancedby torsion sprin

Main sha-t ;PM E 100 ?( Centri-%al -orce eceeds sprin -orce & thebalance 'eihts ets moves a'ay -rom each other it ets arrested bylockin pa'l*

+he lockin action is possible in clock 'ise as 'ell as co%nterclock'ise direction o- rotation o- the main sha-t*

10


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)naement mechanism _ Cam plate act%ationC


1 2

1* !ockin action stops the rotation o- main sha-t*2* ;PM o- the cl%tch plate ets arrested by main sha-t** $%t at the same time the side ear is rotatin 'ith the spinnin 'heel4

hence +he relative movement bet'een side ear & cl%tch plate** ;elative movement ca%ses rampin action o- the cl%tch plate over the

side ears ramp*5* ;ampin action develops aial -orce on the cl%tch plates** Aial -orce develops -rictional tor,%e on -riction plates4 hence lockin

o- lo' traction side ear 'ith di@erential ho%sin*

11

:riction plates

Cam plate

)* mechanism

"ide ear


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Prepared by Amit Gosavi12/1/15

$e-ore lockin1 2 A-ter lockin

Mechanical lockin !"# _ +or,%e trans-er

a* "%n ear ?( .ih traction side ear 70 rpm

b* Planet ear ?( #i@erential ear acts asplanetary ear

c* Ann%l%s ear ?( !o' traction side ear7"pinnin

d* Planet carrier ?( #i@ case 7;eceives inp%ttor,%e

ab

c d

1

2 !ockin o- Ann%l%s ear 7c 'ith Planet carrier7b s%pplies entire driveline tor,%e to "%n ear

7a 12

;eactionblock


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Bhen the vehicle is travelin

over 20mph the co%nter'eiht rotates alon lay sha-tais %nder inF%ence o-centri-%al -orce*

As co%nter 'eiht is interalpart o- lockin pa'l 4 lockinpa'l moves a'ay -rom loc%so- lock notch*


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Advantaes?(1* A%tomatic lockin & s%pplies e,%al tor,%e to both 'heel only at

lo' speed o- vehicle*2* +he #i@erential G*$* can be desined 'ith hihest bias ratio as it

is not oin to lock at hih speed** )ven 2 vehicle 'ith this di@erential develops reater traction i-

compared 'ith 'ith simple !"#*

Mechanical lockin !"# _ Advantaes & #isadvantaes

#isadvantaes?(Cost4 %mber o- movin parts hence maintenance cost little bithiher*

M!(!"#

1


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+hank o%H

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mecanical locking lsd 3

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