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TRANSILVANIA UNIVERSITY OF BRASOV
MECHANICAL ENGINEERING FACULTY
MACHINE ELEMENTS DISCIPLINE
YEAR PROJECT NO. 1
TELESCOPIC LIFTING JACK
STUDENT: APOSTOL ANDREEA STEFANIA FACULTY: MECHANICAL ENGINEERING
SECTION: AUTOMOTIVE ENGINEERING
YEAR: II
GROUP: 1711
SUPERVISER:
Eng: TODI- EFTIMIE ALINA
ACADEMIC YEAR:
2012- 2013
1
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CONTENTS
Me!"#n$% !& '#('%(#)*!n
1+ ESTABLISHING THE LOADINGS ON THE ELEMENTS OF THE
,AC......3
2+ MAIN SCRE/
CALCULUS..........................++3
2+1+ C!!*ng )e
#)e"*#(.........................3
2+2+De*gn
'#('%(%............................3
2+3+ Ce'*ng )e e(&-(!'*ng
'!n$*)*!n...................
2++ Ce'*ng #) '!4!e$
)"ee.....................5
2+5+ B%'(*ng
'e'*ng..........................++6
3+ SECONDARY SCRE/
CALCULUS.......................7
3+1+ C!!*ng )e
#)e"*#(.........................7
3+2+ C#('%(% !& )e n%e" !& )"e#$ !& )e #*n '"e8 n%) 9(!'#)e$ *n*$e )e
e'!n$#" '"e8;
.............................73+3+ C!!*ng )e e
+FI?ED NUT
CALCULUS...........................++>
+1+ C!!*ng )e
#)e"*#(........................++>
+2+ C#('%(% !& )e n%e" !& )"e#$...................>
+3+ Ce'*ng )e
ne'..........................10
++ C!!*ng )e $*en*!n !& )e
n%)..................11
+5+ Ce'*ng )e n%) #) '!4!%n$
(!#$.................++12
+6+ Ce'*ng )e
'!((e".........................+12
+7+ C!!*ng #n$ 'e'*ng )e )%$ n%) )#) e'%"e )e n%) *n )e @#' !$ +12
2
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5+CALCULUS OF THE
BODY.........................+13
6+CALCULUS OF THE
CUP..........................15
7+EFFICIENCY
CALCULUS..........................16
=+ THE METHODOLOGY OF DESIGNING A VERTICAL RATCHETMECHANISM++17
=+1+ Me'#n*
e)'.........................++17
=+2+ Te #n$(e (eng)
'#('%(%.....................++17
=+3+ Leng)ene"
'#('%(%........................++1=
=++ R#)'e) 8ee(
'#('%(%.......................+1=
=+5+R#)'e)
'#('%(%..........................++20
>+ TECHNICAL SECURITY /OR
RULES...................2
10+SUPPORTING STATEMENT REGARDING THE CHOICE OF THE MATERIALS
THE BLANS AND COSTRUCTIVE SOLUTIONS FOR THE MAIN PARTS OF THE
,AC9NUTS BOLTS;
.............................25
11+ TEHNICAL SECURITY STANDARDS OF
/OR...............27
12+REFERENCES.............................
..2=
1+ESTABLISHING THE LOADINGS ON THE ELEMENTS OF THE
TELESCOPIC LIFTING ,AC
3
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F*g 1+1
2+ MAIN SCRE/ CALCULUS
2+1+ C!!*ng )e #)e"*#(
I) * '!en OLC 50 STAS 5002
2+2+ De*gn '#('%(%
L!#$ '#('%(#)*!n cQ N
DE207>01>2500=+1 NQQc === 1+1++05+1= NQ 1>250=
Inne" $*#e)e" !& )e )"e#$ 3d
DE00=>+23
50
207>03 mm
Qd
ac
c=
=
=
DE60+++0 MPaac =
C!!*ng )e )#n$#"$ )"e#$
I) * '!en )"#4e!*$#( )"e#$ T" 32
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F*g 2+1
T#(e 2+1+
N!*n#(D*#e)e" P*)' Me$*% D*#e)e" E 33 25 26 30
2+3+ Ce'*ng )e e(&-(!'*ng '!n$*)*!n
Te )"e#$ 4*)'*ng #ng(e 2 $eg"ee
=
=
= 76+32>
6
2
2
arctgd
Parctg
A44#"en) &"*')*!n #ng(e G $eg"ee
=== 0=+7
2
30'!
12A0
2'!
G arctgarctg
12A0+++11A0= &!" )ee()ee(
Se(&-(!'*ng '!n$*)*!nG
2 +=25
25+2731161633
3
MPad
Mtt =
=
=
e$;#''!4(*9'!n$*)*!n
DE50DE0>+3>+=21+3>
22
22
MPaMPa ace
actce
==+=
+=
( )DE5DE10+++6
DE35332DE6+++2
12A0+++11A0
DE25+2731
535
5351>25012A0
3
1
3
1
0
22
33
2
0
2
3
0
3
mmmmdmmmmdd
Nmm
dd
ddQMM
c
c
c
ft
==
=+=+=
=
=
=
==
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F*g 2+3
( )
>7
DE36
=
=
+==
l
lf
H
mmm
mHklkl
DE25+6
25
6
DE13336>7
DE2661332
=+025+6
255
3
2
3
3
*n*n
*n
mmd
d
d
A
Ii
mmmHl
mmlkl
i
l
l
f
f
===
=
=+=+=
===
===
B%'(*ng $!#*n
4(#)*' %'(*ng
a
c
f cc =
= 62+0335f &!" OL 50
70+30>=+062+0335 ==f
=>+721+3>
70+30>==c
Te #&e) '!e&&*'*en) &!" %'(*ng5++3=ac
' ac 9'!n$*)*!n #''!4(*e$;
3+ SECONDARY SCRE/ CALCULUS
3+1+ C!!*ng )e #)e"*#(
I) * '!en OLC 50 STAS 5002
3+2+ C#('%(% !& )e n%e" !& )"e#$ !& )e #*n '"e8 n%) 9(!'#)e$ *n*$e )e
e'!n$#" '"e8;
7
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0+710;26329
1>250
;9
222
1
2=
=
=
apDd
Qz
MPapa 13++7=
N%e" !& )%"n
F*g 3+1
I) * '!en
=F
10F6
=
Leng) !& )e n%)DE=6= mmPzHpl ===
3+3+ C!!*ng )e e3=;10+++=903 mmmmDd =+=+=
DE3=533;6+++90 mmmmDD =+=+=
C!!*ng )e )#n$#"$*e$ )"e#$
I) * '!en )"#4e!*$#( )#n$#"$*e$ )"e#$ T" 60
8*) #*n $*en*!n 4"een)e$ *n F*g%"e 3+2+ #n$ T#(e 3+1+
=
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F*g 3+2
T#(e 3+1+
N!*n#(
D*#e)e"
P*)' Me$*%
D*#e)e"
E 55+5 61 50 51
3++ Ce'*ng )e e(&-(!'*ng '!n$*)*!n
Te )"e#$ 4*)'*ng #ng(e 2 $eg"ee
=
=
= >5+255
>
2
2
arctgd
Parctg
A44#"en) &"*')*!n #ng(e G $eg"ee
=== 0=+7
2
30'!
12A0
2'!
G arctgarctg
[ ]= mm12A0+++11A0 &!" )ee( )ee(
Se(&-(!'*ng '!n$*)*!n
=5+2 G
2 9'!n$*)*!n #''!4(*e$;
3+5+ Ce'*ng #) '!4!e$ )"ee
Te )!"*!n !en) )#) #') !n )e '"e8 NmmMtA
( ) ( ) DE0>+>=0>5+20=+72
5+551>250
2 2
G2 Nmmtgtgd
QMM insIIt =+=+==
E&&e')*Je '!4"e*!n )en*!n c MPa
( ) ( ) DE21+23
3=50
1>250222
0
2
3
MPaDd
Qc
=
=
=
>
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E&&e')*Je )!"*!n )en*!n t MPa
( ) ( )
DE77+5
3=50116
0>+>=0
16
03
3
MPa
Ddd
Mtt
=
=
=
EK%*J#(en) )en*!n e MPa
DE70DE>2+2577+521+23
DE=0+++60
22
22
MPaMPa
MPa
ace
ac
actce
==+=
=
+=
9'!n$*)*!n #''!4(*e$;
+ FI?ED NUT CALCULUS
+1+C!!*ng )e #)e"*#(
I) * '!en OL 50 STAS 5002
+2+C#('%(% !& )e n%e" !& )"e#$
N%e" !& )"e#$
F*g +1+
5+210;51609
1>250
;9
222
1
2=
=
=
apDd
Qz
= MPapa 6++5 &!" )ee()ee(
106 z 55==Trd
I) * '!en :
6 )"e#$
10
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Leng) !& )e n%) mmHpII A
DE5>6 mmPzHpII ===
+3+Ce'*ng )e n%)
F*g +2+
Ben$*ng #n$ e#"*ng 'e'*ng
C#) *"!n n%) 9en$*ng;
( )
( )aii
ai
aii
MPa
mmPh
zhd
ddQ
=
=
=
===
=
35+106706+550
505+551>2503
DE=0+++60
DE706+5>06363+0
3
2
2
3
32
9'!n$*)*!n #''!4(*e$; C#) *"!n n%) 9e#"*ng;
aff
af
aff
MPa
MPa
zhd
Q
=
=
=
=
DE57+36706A550
1>250
DE35++30
3
9'!n$*)*!n #''!4(*e$;
++C!!*ng )e n%) $*en*!n
11
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E
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( ) ( ) DE60DE61+=
70==
1>2502222
MPaMPaDD
Qas
eg
s ==
=
=
9'!n$*)*!n
#''!4(*e$;
Se#""*ng 'e' MPaf A
DE55+++0
DE75+=1070
1>250
MPa
MPahDQ
af
af
ge
f
=
=
=
=
9'!n$*)*!n #''!4(*e$;
+7+C!!*ng #n$ 'e'*ng )e )%$ n%) )#) e'%"e )e n%) *n )e @#'!$
C!!*ng )e )%$ n%)
F*g +5
I) * '!en )%$ n%) M57+12>=22
70==
70==1>25017A0
3
1
3
1
22
33
22
33
NmmDD
DDQM
eg
eg
g
=
=
=
= 2+0+++15+0 )ee( )ee(
Te !en) *n )e 4*n NmmMs A
DE==+3532>7+12>=220>+>=0 NmmMMM ginsIIs ===
5+ CALCULUS OF THE BODY
13
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C!!*ng )e $*en*!n !& )e !$
F*g 5+1+
( )
( )
( ) DE1570117DE50+++30
DE1177562002;29
DE20050150DE50+++30
DE10DE12+++10
DE7DE=+++7
67+++5
DE75570DE6+++2
1
#
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C!!*ng )e 4*n 8*' '!n!(*$#)e )e '%4 )! )e #*n '"e8 MPapA
( ) ( )
MPap
pMPadd
Qp
a
a
c
0++25
DE2+205==
1>250222
0
2
=
=
=
=
9'!n$*)*!n #''!4(*e$;
C!!*ng '(*n$"*'#( (!))e$ '"e8 #n$ '(*n$"*'#( 4(%g 8*' 4"eJen) #
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DE=0+++60
DE70+51=+1133+6
DE=+1123
25+27311616
DE33+623
1>250
DE2325235DE22
2222
33
22
3
MPa
MPa
MPad
M
MPad
Q
mmmmcdd
ac
actce
ci
f
t
ci
c
cci
=
=+=+=
=
=
=
=
=
=
===
9'!n$*)*!n #''!4(*e$;
7+ EFFICIENCY CALCULUS
E&&*'*en' !& )e )e(e'!4*' (*&)*ng @#'
I& %*ng # 4*g!) )! (*4 e)8een )e '"e8 e#$ #n$ '%4
( ) ( )22A0
535
535
2>
12A0
3
276+30=+7
76+3
3
222
33
2
0
2
3
0
3
2
2
G
2=
++
=
++
=
tg
tg
dd
dd
dtg
tg
c
c
=+ THE METHODOLOGY OF DESIGNING A VERTICAL RATCHETMECHANISM
=+1+Me'#n* e)':
16
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F*g =+1
=+2+Te #n$(e (eng) '#('%(%
=+2+1 M!en)%( n'!J!*e)!" )!)#( DNEAM *)
DE3+121>1163+>55=50>+>=025+2731 NmmMMMM insfmit ==+=+==
=+2+2 Te #')*ng &!"'e !& !ne 8!"e" NFm A
DE350+++150 NFm =
I) * '!en F350N
=+2+3 Te '#('%(% (eng) !& )e #n$(e mmLc A
DE31+3=35011
3+121>11mm
FnK
ML
m
it
c =
=
=
n 1 !" 2 n!+ !& 8!"e"
n 1
1
=+2+1+ Leng) !& )e #n$(e mmLA
17
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DE31A3>=5031+3=0 mmlLL c =+=+=
1DE500 == nformml
=+3+Leng)ene" '#('%(%
=+3+1+ Leng)ene" (eng) mmLp A
DE6>
DE=0+++50
DE>+3276>0+13>31+3>=
DE0+13>31+3>=35A035A0
mml
mml
mmlLLL
mmLL
mp
m
=
=
=+=+=
===
=+3+2+ Leng)ene" $*#e)e" mmdpe A
( ) ( )
DE120
DE2077+1>120
50>+327350113232 330
mPa
mmlLFnkd
ai
ai
pm
pi
=
=
=
=
D*#e)"%( e
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( )
DE5+26DE5+261555A0;2++195A0
DE36+>=36+10==
DE6+7736+10==
DE36+1027+176A0=A0+++6A0
DE27+17=2
==
2
mmammda
mmhDD
mmhDD
mmbh
mmz
Db
me
mi
m
=
==
=+=+=
===
===
=
=
F*g =+2
=++2+ Ce'*ng )e "#)'e) 8ee( %n$e" )"ee
Ce'*ng )e '!g #) en$*ng MPai A
DE120
DE120+++100
DE10
DE10+++=
DE27+217==
0>+>=022
DE37+221027+17
36+1027+21733
1
22
1
MPa
MPa
mm
mm
ND
MF
MPab
hF
ai
ai
m
it
aii
=
=
=
=
=
=
=
=
=
=
9'!n$*)*!n #''!4(*e$;
Ce'*ng )e '!g #) e#"*ng MPaf A
DE100+++=0
DE3+121027+17
27+2171
MPa
MPab
F
af
aff
=
=
=
=
9'!n$*)*!n #''!4(*e$;
Ce'*ng )e '!n)#') %"'e !& )e '!g #) '"%*ng
DE120+++100
DE72+2036+1010
27+2171
MPa
MPah
F
as
ass
=
=
=
=
1>
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9'!n$*)*!n #''!4(*e$;
Ce'*ng )e #e( !n 4!(g!n#( '!n)!%" #) '"%*ng MPas A
F*g =+3
DE120+++100
DE122102
DE17+>31213
0>+>=02222
MPa
mm
MPaa
M
as
t
as
t
it
s
=
=+=+=
=
=
=
9'!n$*)*!n #''!4(*e$;
=+5+R#)'e) '#('%(%
=+5+1+ C!!*ng )e #)e"*#(
I) * '!en OL 50 STAS 5002
=+5+2+ C!!*ng )e $*en*!n
L!'#)*ng "#)'e) *e *n
=512
26;1+++5A09
2
DE2622;6+++9
DE5+62336+102
36+>=;+++29
2
DE5105A0;6A0+++5A09
11
1
1
===
=+=+=
=++=++=
===
Dh
mmdD
mmhD
l
mm
pe
e
R#)'e) *e*n
DE162=+16127+17=
==1
DE25125=
2
112
mmbz
Dh
mmhl
m
t
=
=
=
=++=++=
20
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F*g =+
=+5+3+ Ce'*ng )e "#)'e) #) e
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5+102
5=
2
7+2=25+10
12+2172
e$;#''!4(*9'!n$*)*!n
DE=0+++60
DE>5+2112
7+2=2
112
2
11
22
=+=+=
===
=
=
=
=
ha
a
aF
MPa
MPad
af
af
b
f
F*g+=+5
Ce'*ng )e 4*n #) '"%*ng
DE=0+++60
DE>7+1>36+1012
7+2=2
MPa
MPahd
as
as
b
s
=
=
=
=
9'!n$*)*!n #''!4(*e$;
Ce'*ng )e 4*n #) en$*ng
22
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DE120+++100
DE=+7512
36+107+2=2161633
MPa
MPad
h
ai
ai
b
i
=
=
=
=
9'!n$*)*!n #''!4(*e$;
>+ TECHNICAL SECURITY /OR RULES
Te #*n 8!" #&e) "%(e #"e:
- ,#' "e4#*" *& *) *(%"e 8*(( e #$e !n( 4e'*#(*e$ 4e!4(e
- ,#' * n!) *ne")e$ #) "#n$! (!#$ %) !n( *n 4(#'e 4e'*#(( $e*gne$ )!
(!#$
- T! 4"eJen) #''*$en) *& )e (!#$ * (*&)e$ #&)e" )e *n)e"Jen)*!n %n$e" *g
(!#$ 8*(( #(8# en%"e (!#$
23
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- F!" # e))e" &%n')*!n*ng !& )e @#' *) * "e'!en$e$ (%"*'#)*!n
4e"*!$*' '!%4(*ng !& )e @#' '"e8
- /*(( n!) (*&) # (!#$ g"e#)e" )#n *n$*'#)e$ *n '#('%(#)*!n
- T! (*&) )e (!#$ *) 8*(( n!) %e )e "#)'e) $"*Je e'#n* 4"!J*$e$ *n )e
'#('%(#)*!n !n( (eng)ene"
-Ue !& #n )4e !& e
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11+ TEHNICAL SECURITY STANDARDS OF /OR
One n%) (*&)*ng @#' * *n'(%$e$ *n )e (*&)*ng e'#n* !& 8*' '#%e %)
e 4"!J*$e$ # e"*e !& *n)"%')*!n #n$ e#%"e )! 4"eJen) #n$ #J!*$
#''*$en) #) 8!"+
L*e #n (*&)*ng e'#n* )e (*&)*ng @#' !%($ en%"e )e e(&-"#*ng
'!n$*)*!n e#n*ng )#) 8en )e @#' !4e"#)*ng )!4 *) 8*(( n!) (( e((!8 )e
#')*!n !& )e (*&)*ng )#+ Te e(&-"#*ng '!n$*)*!n * en%"e$ $e '"e8-n%)e'#n*+
Te %e" !& )* (*&)*ng e'#n* 8*(( e )"#*ne$ !n !8 )! 8!"
'!""e')(+ I) * "e'!en$e$:
- Te @#' 8*(( e %e$ !n( &!" #n%#( #')*ng
- I) 8*(( n!) e %e$ &!" (!#$ g"#)e" )en 1>250N+ F!" )* "e#!n 8e 8*((
#" #) # J**(e 4(#'e )e #
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- Te @#' *) 8*(( n!) e 4%) $*"e')( !n )e g"!%n$ e'#%e *) "e*)#n'e
* %nn!8n+ In )* 8# %n$e" )e @#' 8*(( e *ne")e$ # 4(#)e &"! #
#)e"*#( %&&*'*en)( )"!ng )#) 8*(( n!) #((!8 )e (*$*ng !& )e @#' *n
!"*!n)#( 4(#ne
- Ce'*ng )e )e'n*'#( 4"!4e" &%n')*!n*ng !& )e @#' e&!"e %*ng *)
- Te"e 8*(( n!) e %n#))en$e$ (!#$ (e&) !n )e @#'
- Te @#' )!"#ge *) 8*(( e #$e %' )#) %-#e(*e $e&!"#)*!n
8*(( e #J!*$e$ *n $" 4(#'e %' )#) )e '"e8-n%) e'#n*
!=+
2+ DRAGHICI I+ +#+ In$"%#" $e 4"!*e')#"e *n '!n)"%')*# $e #*n* J!(+ I+
B%'%"e)* E$*)%"# Ten*'# 1>=1+
3+ DRAGHICI I+ +#+ O"g#ne $e #*n*+ C%(ege"e $e 4"!(ee+ B%'%"e)* E$*)%"#
D*$#')*'# * Pe$#g!g*'# 1>=0+
+ GAFITANU M+ +#+ O"g#ne $e #*n* J!(+ I+ B%'%"e)* E$*)%"# Ten*'# 1>=1
5+ ,ULA A+ +#+ O"g#ne $e #*n* In$"%#" 4en)"% 4"!*e')%( $e #n n"+ 1
Un*Je"*)#)e# $*n B"#!J 1>=6+
26
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