Vo duiing vong dung Vi!. yang dung tu Ao thing xu6ng B, va cang Mu tm B\U... Than lui tui dge vii ffii sau Ct.t theo hlnh 7.9.
Trang 1.CHLlaNG 7
•
THIET KE QUAN Au NAM 1 LY L~T
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Trang 2- Quan c~p rai, tui d9c cheo, etta quan khoa keo
- C6 1 tIii wi sau (h 7.1)
II -s6 DO MAU (em)
I Dai quin (Dq) : 95
2 Yang b~ng (Vb) : 72
3 Yang rn6ng (Vrn) : 88
4 Yang ang (V6) : 40
5 Cit d¢ng m6ng (CDm) : 7 (6 -;- 8) CDt = 2
CDs =1.5
III -TlEU CHUAN V AI
Kh6 vai 150em : 1l0em
IV - PHUONG pHAp THIJh KE
M6i quan h¢ gifra than tnrac va thAn sau dugc th€ hi¢n a h'inh 7.2
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Trang 3B9
B10
-
1-VW4 + chiet(3) Vbl4 + ly(3,5)
A-1"4 Iii! 'iiI
T'\
'" N v •
>
Vm/4+CEJ\
m
•
VrnI 10+1
~
•
~
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Trang 4A - THAN TRlIOC (h 7.3)
Ke duemg d1!Dg dQc quiln each
bien voi 1cm Tren dubng d6 la
xac d!nh cae do<;tn :
1 Dili qulin (AX)
AX = 56 do Dq = 95
2 H~ cira quan (AB)
AB = V
4m + 2 (0 + 2) = 24
3 f)j~m ngang mong (BB')
AB
BB'= ""4 =6
4 H~ g6i (AC)
AC = !.?r + 5 = 52,5
Tu cae di~m xac dinh, ke cae
duemg vuOng g6c v6i duemg AX
5 R(>ng IMn I~i cira quan (BB I)
BBI = V
4m + CDt = 24
6 Gia cira quan (BIBo)
BIB2 = 3,5 (c6 dinh)
7 Chia Iy chlnh (BB3)
BB3 = BB2 = 13,75
4
96
Ke Iy chfnh qua B3 va song song
dubng dvng dqc quan, d.t cae
dubng ke ngang lu tren xu6ng
du6i t1;li C<lc di~m Aj , C1, Xl'
B
Vb! I 3
A",~T, j
~;~
T,
'" N
•
~
Tj > B'
Vm/4+CDt <
, 3 S Bj B3 B
~
•
~
C, C' , C j C 3C
,
V6I2-2
Hinh 7.3 - Th{in tn({rc
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Trang 58 Ve cita qu~n
- Giam vat cira quffn A,A', ; 1,5 (1 -;- 2)
- Ve eua qu~n qua cae di~m A' 2, B4 • B2
- Ban moi to 4cm, dai qua duemg ngang mong 1 em
9 R(lng cap (A' ,A3) : A' ,A3 ; ~b -;- Iy (3,5) ; 21,5
10 Giom guc cita qui\n (A' ,A" ,) : A' ,A", ; 1
V~ch dui'mg chan c<:lP noi A3A"2'
11 R(lng 6ng (XIX,; XIX3) : XIX,; YO _ 1 - 9 4
-12 Vi' dUOng giang qu~n
- Ke noi B,X, d.t ngang goi tai C:"
- Giiun goi C, C',; I
- Ve giang qu;ln cong dell qua d.c diem B2,C'2'X2
13 Ve duimg dQc qu~n
- Giiun goi CI C3 ; CI C',
- YO dge quiln eong deu qua cae diem A" B:, C" X3,
14 Ke mi~ng tui
- D~ eheeh mi¢ng tui (A, T) ; 4
- R¢ng mi¢ng tili (TTl); 17
- Diem eh~n mi¢ng tui (TT ,) ; 1,5
- Di~m ch;'j.n mi~ng tdi T 1 nam tr~n duemg dqc qw'in
15 Ke Iy
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Trang 6B - THAN SAU (h 7.4)
1 Sang dau cae dUOng ke
ngang thea than tmoe, g6m :
- Chan e~p (A)
- Ngang mong (B')
- Ngang dung (B)
- Ngang g6i (C)
- Ngang gau (X)
2 Ke dUOng Iy ehinh than sau
vu6ng g6c v6'i cae dttCmg ke
ngang, cAt cae dltCmg k6
ngang t~i cae di~m A4 • Bs
C4 , X4 ·
3 DuOng dung m6ng
- Phfa tren t~i duemg chan
cap (A4A,) :
A4A, ~ Vb -0,5 ~ 3,1
20
- Phfa du6i t~i duemg h~ ella
qu~n (B,B6) :
Vm
B,B6 ~ 10 - I ~ 7,8
N6i A6B6 t~a dUOng dung
rn6ng than sau, cat ca.c dubng
ngang m6ng t~i B,
4 Dong cap (A,A6)
A,A6 ~ 1,5
98
B9
B, 0
-l
I Vbl4 + chiet(3)
A,
"\
lA, 1\ :; ::if
"/ Y 13"
8,
B, Vm/4+CEls B,
~B,
Vml10-1 B5
VmI 10+1
,
Vol2+2
Hinh 7.4 - Thein .I'WI
7- GTTKQA - B
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Trang 75 R\ing qp (A6A7)
A6A7 = ~b + chiet (3) = 21
6 Rong ngang mong (B7B,)
Vm
B7 B, = 4 + CDs = 23,5
7 RQng 6ng (X4Xs = X4X6)
X4XS = X\X2 + 2 = 11
8 RQng ngang dung (B6B9)
Vm
B6~ = 10 + 1 = 9.8
H~ thilp dung than sau B9B\U = 1, ke song song v6i dl1img ha
eua quAn
9 Vo duiing vong dung
Vi! yang dung tu Ao thing xu6ng B, va cang Mu tm B\U
10 VO duimg giang quan
- Uy C4 C, = C\C'2 + 2
- Ve giang qulin cang Mu qua cae diem BIO, C" Xs
11 VO duiing dQc qulin
- Uy C4 C6 = C4 C,
- Ve d9c qulin cang Mu qua cac di~m A7, Eg, C6, X6
12 VO chiet
- Duimg truc chiet A7 S = A6A7 = 10,5
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Trang 813 Tui sau
- RQng mi~ng ttii = 13 (12.;- 14)
- TUi ve cAn d6i voi chiet
- Blm to mi~ng tui cai :::; 1
C - CHI TIET PHI,)
1 C~p qu~n (h 7.5)
eM thee chieu doc viti :
- Chieu d"i c~p (1/2) = ~b + 10
- Bim to qp = 4
1 - - - - Vb + 10
2
Hl'nh 7.5 -Cl!P qllan
2 lIap lui d~c cheo
Dl!a VaG thAn quan tru6"c, cAt thee
hlnh 7.6
3
Hlnh 7.6 - Dap oli dQc cheo
100
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Trang 93 Coi va dap lui sau (h 7.7)
Kfeh thuae 6 x 16 (eM dge sqi)
4 flap moi (h 7.8)
16
Hinh 7.7 -Cui va diip lui sau
- Chieu dai tir chan c~p qua dl1Cmg ngang m6ng 2cm
- Ban to : dau tfen 8, dilu duai 5 8
5 Than lui (tui dge vii ffii sau)
Ct.t theo hlnh 7.9
I
I
I
OJ
I
I
5
Hinh 7.8 -Dap moi
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