TRNG TRUNG CP KINH T K THUT NGUYN HU CNHKhoa : C Kh B mn : Khung gm tChng 2: BO LY HP OTO ( CLUTCH )GV: V Quc Hng

I.CONG DUNG, PHAN LOAI, YEU CAU :1. Cong dung :

+ Truyen momen quay t ong c en he thong truyen lc. + Tach dt khoat va noi em du ong c vi he thong truyen lc. + am bao an toan cho he thong truyen lc khi gap qua tai nh phanh ot ngot ma khong nha ly hp.

2. Phan loai : * Phan loai ly hp da theo cach truyen momen t truc ong c en truc s cap hop so, c chia thanh cac loai : + Ly hp ma sat : momen truyen nh cac be mat ma sat. + Ly hp thuy lc : momen truyen nh chat long. + Ly hp ien t : momen truyen nh tac dung t trng nam cham ien. + Ly hp lien hp : momen truyen nh cac loai lien ket tren.

* Tuy theo hnh dang va so lng cua a ma sat ma chia ra cac loai: + Ly hp loai a bao gom mot a hay nhieu a ma sat. + Ly hp hnh non. + Ly hp hnh trong. + Ly hp hnh con.

* Theo phng phap phat sinh lc ep tren a ma chia ra: + Ly hp lo xo gom cac lo xo tru at xung quanh, at trung tam, lo xo a. + Ly hp ly tam: lc ep sinh ra do lc ly tam cua khoi trong phu ep vao. + Ly hp na ly tam: lc ep do lo xo cong vi lc ly tam cua khoi trong quay. * Theo ket cau can ly hp chia ra ly hp thng ong va ly hp thng m. Hien nay cac loai ly hp ma sat mot a, hai a kieu lo xo, va loai ban ly tam c s dung nhieu nhat va thong dung nhat.

ONG C NAM DOC

ONG C NAM NGANG

3. Yeu cau : Truyen c het momen quay ln nhat cua ong c trong moi ieu kien: + ong ly hp em du, momen quan tnh phan b ong phai nho e giam tai trong va ap len cac banh rang. + M ly hp dt khoat va nhanh e viec gai so em du. + am bao cho he thong truyen lc khi b qua tai.

+ ieu khien de dang, lc tac dung len pedal ly hp phai nho. + Cac be mat ma sat thoat nhiet tot am bao s lam viec bnh thng. + Ket cau n gian, de ieu chnh, bao dng de dang.

II.KET CAU VA NGUYEN LY HOAT ONG : 1. Ket cau: Ket cau cua bo ly hp gom co: + C cau ieu khien + Np bao ve ly hp ( nap ly hp ). + Cang m ly hp. + Vong bi cat ly hp ( bac an cha ). + Mm p + a ma sat.

CAU TAO CHUNG BO LY HP

a. Cau tao bo ly hp 1 a ma sat: A. Truc khuyu quay a chu ong ben trai, a ben phai khong tiep xuc a chu ong.

B . Hai mat c ep vao nhau, lc ma sat lam quay a khac noi vi truc s cap.

ong ca chu onga b ongTruc ra Be mat ma satMat ma sat nam gia a chu ong va a b ong a b ong b ay vao a chu Mo ta hoat ong ly hp

+ Phan chu ong gom cac chi tiet lap ghep trc tiep hay gian tiep vi banh a va co cung toc o quay vi banh a gom: banh a, a ep, vo ly hp, lo xo ep. + Phan b ong gom cac chi tiet lap ghep trc tiep hay gian tiep vi truc b ong cua ly hp ( hay truc s cap hop so) va co cung toc o goc vi cung truc b ong cua ly hp gom: truc b ong, a b ong.

KIEU LO XO XOAN

KIEU LO XO LA

NGUYEN LY HOAT ONG: Khi cha ap pedal ly hp, do sc nen cua lo xo ep, cac bo phan: a ep, a ma sat, banh a tao thanh mot khoi. Do o khi ong c hoat ong, truc khuyu ong c quay se lam quay truc s cap hop so, banh rang hop so, truc th cap, truc cardan, cau xe va cac banh xe quay theo, giup xe tien hoac lui de dang.

Khi ly hp v tr m, di tac dung cua lc ap pedal lc c truyen qua cac c cau can ay en cang m ly hp ty vao bac an cha, bac an nay ty vao au can m. Luc nay can m se keo a ep dch chuyen ra xa lam cho a ma sat tach ri khoi banh a va a ep, do o moment ong c khong truyen qua hop so.Trang thai ly:

Khi pedal ly hp c nha ra, sc ep cac lo xo ben trong mam ep ay ve pha trong a ly hp. Lam khoa chat banh a a ma sat, mam ep, a au vao hop so noi lai vi nhau. ong c lam quay truc s cap hop so, banh rang hop so, cardan, cau xe va cac banh xe.Trang thai hp:

b. Cau tao bo ly hp 2 a ma sat:1.Vong ma sat2.a b ong3.Tam gn song4.em an hoi5.Moay- a b ong6.Lo xo giam chan7.a gi8.on m 9.Lo xo ep 10.Khp ngat ly hp 11.Vo ly hp 12.Tru ty 13.a ep 14.Cang m Cac chi tiet cua ly hp hai a ma sat. 1234568791011121314

S O NGUYEN LY HOAT ONG:

Khi ly hp ong cac lo xo ep chat cac a ep va a b ong vao banh a. Luc nay lo xo cung b ep lai, gia au cac on m vi vong bi tren khp ngat eu co khe h e am bao ly hp c ong hoan toan. Trang thai hp:

+ Khi m ly hp, qua cac bo phan dan ong se lam a ep dch chuyen ve ben trai e giai phong a b ong th nhat. + Khi a bat au ta vao cac bulong th a b ong th nhat c tach ra hoan toan. + a ep tiep tuc dch chuyen ve ben trai e giai phong a b ong th hai, ch khi ca hai a b ong cung c giai phong th ly hp mi c m hoan toan.

Trang thai ly:

2. C cau ieu khien:a. C cau ieu khien s dung cap:

Thiet b ieu chnh cap t ongMot lo xo c gan ben trong quat rang va con coc. Khi tac dung lc len pedal lam cang cap va tach ly hp. Luc nay banh coc an khp vi quat rang. Khi buong pedal ly hp ong. Lo xo keo cang si cap va c an khp. Neu cap con trung th coc se dch chuyen ve hng keo cua lo xo, coc se dch chuyen sang banh rang khac.

b. C cau ieu khien bang thuy lc:

*