Report Screw Jack (1)T

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DESIGN AND ANALYSISOF c

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SCISSOR JACK

ADEESH JAIN UE7904 ASHISH SHARMA UE7913 HANISH GUPTA UE7924 PARNEET SINGH UE7939

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1c Introduction c

1.1c ñechanical jack +c  !c c   c  c c  c /c %c  c c $$%c  c / c( !c$ %cc 1c c c%   c % c c$$%c %c c c/ c +c   c  !c c c  c 1 c /c %c 5 $c 6c  c

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c !c c c !c1 c/c c  cc c c$ / c# c !c  %c c  c  c  1c c  c  c /c c  c %c  c / c  c

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1.2c Scissor jack   c  !c  c $c  c c  c  c  c  c  c  6c$ 1 c 1cc /cc  c  c !c  cc  c /c / c 5  c %c c  c  c  c c   c   c  !c  c  c c 4c c /c / c c  c  c%cc$ 1 c 1cc+c  c !cc $ c$%c%c cc c !ccc c c cc /cc  c !c6c !cc  %c787c$c6cc/c cc c c c ccc /c c  14c 1 c c c  c /c / c c c   c  !c -c c

!cc 4cc 1c 4ccc cc !c6c 1c c !cc c cccc9c 1c :4c1 c cc  cc1 c 4c$  c1 !c( c%c cc 1c 4c c  c !c c/cc ccc c c$ cPower

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1.3c Problem Statement: c 6c c  c$ c  c1c c  c !ccc %c /c  !c 1c c  !c  c 

c c 1c  c + c c

 c !ccccc c c$ c$ $ c $$ c c c / c$c //* cc c  ccc !cc  cc c 1.4c Objective: 6c $  c c  c c c /c $c   c  !c c c %c  c 1c   c $ c  c !c  c c  /c  !c c c  %c c c c !c  c  c c c  / c c 1c  cc c 1c 6c $  c  c c c c c /c  4c //  %4c 2$ c/c /c 1c-c c c $cc 1c !c cc cc c// 4ccc c/cc ccc %c c

1.5c Roadmap: { c1c ccc/ cc $ c /c  c$ c/ c c $  c c 6c   c c c  c c c $  c c $c c $c c
c c c  !c  4c
c c c /c c c $

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2c Scissor jack: 2.1c Specifications c c

Îc 6c c7  c !7c cc 1c %c /c

ccc /  1ccc$  $=c c cc c/c c 6%c cc%c c cc  c%c c/ccc c  >cc/c cc cc/cc  c/ cc/cc c  c  c 6c  1c c  c  c  c c  !c 1c c c  cc c91cc cc/:cc c2$cc1cc cc c c

c c c

Îc 6c  c $ /  c /c   c /c c c %c  c c %  c c  c  c 1 !4c c  c / c c  c $ c cc c$ c cccccc c/ c c c $ c  c c  c 6c  c c 1c c   c5 %c  cc  c/cccc c Îc  c  c/cc cc1c %c /c 4c%c cc c1c %c /c$ 1 c c  c/c/ c/c  c cc $ 1 c    %4c %   %c c /c c   %c c c  c c /c c $  4c   c   c /c c

0c c
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$ $cc c c /c$ 1 c%c4c c   c

$ c c2c c Îc   c /c  %c /c  c 1 c  =c c   c /c c  $c   c /c +c c   c /c c  c 1 c

c c c 727c 6c c c c %c  c  c c   ccc /cc c   ccc /cc /4cc!cc

c c1 c!cc c c

cc  c4c $c/ccc c c  4cc c c c ccc cc $$ c   c6c  1cc  c/c c c c

2.2c Assembly +c  c !cc/ cc$ c /ccc1 ccc6c / cc$ c cc  ccc  c1cc cc  1cc  c c1c+c 1c c c cc%c c cc  c+cc 1c cc 4cc !c c  c ccc $c c c  4c/ cc cc 1c  c64c c !cc  c1%4c%c cc c   c-c $4cc/ cc c   c  4c c   ccc4c cc !c-c  4cc c$ c  !c$ ccc !c  c c/c ccc c

2.3c üorking +c   c  !c c c $c  %c /c  c  c c c $ 1 c +c c  1c   c c  4c 1 c c /c c  !c  c   c   c ?  cc c /cc 1c c$ c $cc 4cc c /c / cc$$cc $cc!cc %cc c /c/ c  c cc !c4c%cc  c  cc  c c cc  cc  cc ,c c
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+cc$$cc c2c $1 c6c  @c  c1c c  c  c  c $ c c  !c / c $c c  c  $c c  1c / c 4c ccc c$$%c/ c  %c cc/c% c1 c c $ c $  c   %c c c !4c c c % c 1c c c

!4cc$  c1 c ccc c c4cc c% c1c cc$ c /c  cc c

2.4c Components Îc & c Îc
1 c 1c Îc cc Îc # $c c Îc # !c

Îc ›rame: 6c c/ c /cc  c !c c /c!9 $cc  :4c c/ 4c $$ c/ c6c/ cc /  c%ccc $

cc/ c%c 1* c   cc c

Îc Power  rew:
1 c  1c  c c  c  c  %c   c c  c   c   ccc c c  c 1c6%c/c c c c  cc  ccc 4cc  c 

4c    c  !4c >c  /c /$c 2 4c   c   4c  c    4c  c /

c $ 4c   4c c #*

$c c +c  1c  c c / c %c c c  c  c 

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c  c c  c /c c c cc "c c
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c 6c  %c /c  1c  c c %c 

!1c  4c 1 c c  cc *c c 1c1c/*c c c cc 2 $ c c& c2$4c 

!1c/ c c$$c cc  1c 91 c 1 c 1 !c  c  c c *c  :4c c /**  c 1c1 ccc$$ $ c   c c
1 c  1c  c %$ %c c / c   c 4c  %c 4c c c c c %c  c  %c c 1c  A4c $ 4c c c c  c ? Ac c $ c  c  c $ $  c / c  c  %c $$  cc%c$ c 1c // c /c/   c/ cAc  c 5 c 6 c c$ c cc/ ccc cc  

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cc cc 1c1 c c c cc cc

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1 c  1c $ c c $ c c / c  c   c c $ 1 c 6%c  c c / c $ c %   c c $  c  c %c c %c 5  c  c $  4c $ $4c $$4c / 4c !4c c c %c  c  $$ c c 5  c %c c %c + 4c  1c  @c !c  c  c  c  c $ c 1c c 1 c  c  c

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1 c 1c  

6 c c/ c c  c  c  cc cc$  c %c $ 1 c  1c c  c 6c 1 c  c  c  c  5 c

  c c cc& c4cc 1cc c9 5 :ccc  c c %c$  c c cc cc c9 5 :cc c 1c c %c6c1 cc  c  c c c

  c  c  5 c c & c 34c c  c   c c  c / c 9 :c c c  1c c c c  1c   c c  c / c 9 :ccc c c6c1 c  c c  %c / c  cc7 !c 74c7   74c 4c$ $ %4c7  7c )c c
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Fig1.

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cc6 c cc%$c /c 1c c cc$ 1 c 1=c c cSquare thread=c Îc c c/ c$ 1 c  cc c   c Îc  cc2 c//  %cc c Îc cc$ %cc 1c !cc $c c 2.cA
e thread: Îc ccc /  c /c5  c c Îc Ê//  %cc 1 cc5  c c Îc 6c $c cc c/ c c Îc cc%c /  c c 3.cButtre Thread: Îc cc c1c c/ c c cc 1c2cc c    c %c Îc cc c//  %c!c5  c ccc /c c!c  c c Îc ccc c c /cc Îc ccc c /c$ 1 c  c c

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Îc   c +crivetccc$ c  c/ c?/ cccc c c /cc

c %  c/c1ccc c cc6c c $$ cccc cc !*cc cc cc $ ccc$  c c$ * c 4ccccc $4c c !c 9c/ :4c ccc2$c c cccc c/c  4c cc cc$ c6 c c1cc1 c c /cc 4cc ccc cc/  %cccc / ccc cc $cc c !*c Îc Coupling nut:

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1 c  cc$ c cc$ 1 c 1cc%c // c / c  c c c c   ccc ccc

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PHASE-I(market research): 3c Research & Decision ñaking: 3.1c Product Comparison

? 1c c%c1 c  c  c !cc c c cc !cc1c  c c c 6%c $ c c 1 c $  %c  c /c   c  !c >c  c $ 1 c %c    %c c  c c 5  c  c $ c Pi ture

Figure 1

Feature Pro Îc #c/c $c Îc 6c   c  c'')!c   c !c Îc Ê   c

$ c   c c !c $ 1 c $cc %cc3Bc %c #c$ 1 c Îc #c  c c

$ c Îc Ê2c  !c1%c C4c / cc

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Con Îc 6cc1c

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$2%c /cc %c c  c $$  %c / c/ c Îc ;c /cc    c$ 1 c  c ccc   c1c  %c$ 1 cc  c5 c

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Îc ./cc Îc 6c !Dc Îc $ cc !c $c

!c cc c // c Îc Ê2c Ac Îc 5  c cc / c,C*

c4cAc Cc  c9$   %c c14c  cc Îc   c  cc cc 34)))!c  c c $ c  c

$ c 5  c %c Îc .!cc$  c Îc  c c  4c cc c %c c %c$ c    %c / ccc Îc 6

c c cc  !c c c  c

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c c c c & cError! Referen e our e not found.c ccccc  c

 $c /cc  c !cc ccc%c1c$  c1cc c cc  $cc6c$  c c !c $$ c/ cc 4c c ccc$ %c /cc !c$$c9$ %c cc c / cc c/  c 4cc c $ cc c  1 cc  c !cc1cc $$ c

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3.2c Preliminary Designs

+cc/ 4cc ccc  c /cc  c !c c $ cccc

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c $ ccc c /cc  c !4cccc c $cc
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  cc c$ c$$4c c cc %c 1c c  $c c   c /c c  !c 9 c !c Error! eferen e our e not found.:c c 6c Ac  c c c Ec c c 1 c1cc !4c

!c c$ c1c 4c4c1cc !c c 1 4c c c $ cc$cc!c c ccc Deign

Pro Îc .c1c Îc $cc9c $ c/ c/ :c Îc #$c Îc ’cc c c Îc Ê%c c c

Con Îc cc!c $$cc !c Îc ; cc%c 1cc $c !c c $c

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Îc Ê2cc!c $$cc!%c Îc $cc c

Îc ; cc%c 1cc $cc   c !cc $c Îc $cc c $ 4c !c c// c Îc +c 4c c 1c

Îc +c%c c !c Îc Ê2cc!c $$cc!%c Îc
c $cc Îc  c cc $ c c $ccc%c c  c Îc %cc1c   c1c  c

Îc +c $2%c

c c c/ c $ c Îc +c $ c c c c

c 3c

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3.3c Decision ñaking

6 c$c!cc  c/ cc/c4ccc 1c1cc   c /c ccc6cc c !c c c$ /  c / c c  %4ccc$ /  c  cc3ccc1 cc14c c c cc c c cc  cccc6c c1ccc cc c c 4c/%4c1cc  c9/   %ccc c/ ccc  cc  cc $ cccc c cc c $c /c c c1cc  :cc6c c/ c/%c1cc c%c5, 10, 15  c /cc$  cccc c c c Attribute

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Total

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14

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cEc ccc c /c 4c cc ccc 4c 1cc 4c 4c  c /ccc c /c 4ccc  cc/ccc  ccccE3cc/%c c c14c

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c cccEcc/%c1 c $ c c 1cc 4c cc c  cccc c$ c 3.4c ›inal Design

cEc ccccc%c /c cc   c/%cc2 %c$ c1ccc$  ccc  c/cc34)))c!c  c/ cc cccc c c c ccc /ccEc ccccccccc/ %c

$ c !cccEc cc%c1c c cc 1cc c $ ccc /c 4ccc2 c 1c ccc c $  c%c  c

c!cc$ 1 c c c1  c 9c$  cc c c5 $$c1cc  c !:c c c c c c c

3.5c Voad criteria and assumptions:

6c c/ c1 cc !cc cc$ %cc cc  c / c& c %c%c c1cc cc1c%c %c !c 'c c
   c c

cc c  c  c !c c c1 !c// %cc  c$ %c/c-cc c /c 1cc c%c  4c  c !c1 !c// %cc

%c1 c c // c+ cc !cc%c c c  %ccc c  c  cc c  4c!cc  c !c/ c 1c c  cc c1ccc

cc Êc c1=c)!F3)c!91c /c1/cc  c  c c c -c c c=c3)F=c0)!c &  c /c/%=cc -c/ c1 cc=c3)!c c

3.6c ñaterial selection:

 %4cc$ c /c c  cc c%c c  c c ccc /c c cc   c /c  %c-c c $ ccc4c  c4c$c   c cc %c4cccc cc  c  c/ c cc/c c cc 1* c   cc9 $  c

cc /cccc +6Ê+.c+;c{Ê+6c6Ê+6 Ê;6c
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cG{+;;+:c 6c c1ccc $%c c$c   cc cc  c !c c$c   cccc1 !c /cc c $c6 c  cc/%c1c1c c   c /c  c cc$c   cccc  4c c/ c

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PHASE-II (Design phase): 4c Sketches Error! Referen e our e not found. Error! Referen e our e not found.c

1cc cc! c c cccc c$c /c c$  cc %c /cc cc cc$ c /cc

3c c
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4.2c Supports c c

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4.3c Stresses acting on various components c

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4.4c Self -locking criteria c

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PHASE-III 5c PRO-e ñodels 5.1c Parts

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ccc /ccc 1cc c /c c c cc  cc  c $  c/ c c c 4c c  c c %c!cc$ c c/ c c c1cc ccc $c /c$ c; 1c1c1c %c ccc /c !c !cc/ c c c c

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Power  rew

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Coupling nut c c c c

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Botto
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6c Possible failures and errors: +c’c  c /c %c 9%=c-c  c $$ c  c/ c cc c/ cNc/

c$c2c  c  :c ?c( !c/ c c c2 ccc/9O3)!:c #c& c /c$  %c c c cc cc c  c c

©c References c

©.1c mooks referred Îc  ccc c%c
c!c Îc c /c cc%c! c Îc  c /c c%cGc $ c Îc +c 2

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©.2c üebsites referred Îc %   9Davison Design: Jack 'N Stand Animated Video) (1 oct 10)c Îc 

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