Random engagement roller chain sprocket having improved noise ch

Details Random engagement roller chain sprocket having improved noise ch Random engagement roller chain sprocket having improved noise ch

1999-10-15

2000-07-18

Bucci, David A.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

474153, 474152, F16H 5530, F16H 5512, F16H 702

Patent

active

060900032

ABSTRACT:
A unidirectional roller chain sprocket for use primarily in automotive engine chain drive applications which incorporates an asymmetrical tooth for improved noise reduction. The sprocket includes a first plurality of sprocket teeth each having a first engaging flank with a first contact point at which a roller contacts the first engaging flank, and a second plurality of sprocket teeth each having a second engaging flank with a second contact point at which a roller contacts the second engaging flank. The first engaging flanks include a flank flat which facilitates spacing the first contact point on the first engaging flank relative to the second contact point on the second engaging flank to effect a time delay between an initial roller to first sprocket tooth contact and an initial roller to second sprocket tooth contact. The flank flat is tangent to an engaging flank radius and a first root radius. The asymmetrical tooth profile may also incorporate one or more inclined root surfaces which provide tooth space clearance for maintaining the chain rollers in hard contact with the root surface in the sprocket wrap. The asymmetrical tooth profile may also incorporate added pitch mismatch wherein the sprocket chordal pitch is less than the chain link pitch to facilitate a "staged" roller-tooth contact as a roller moves into full mesh from an initial tangential impact at the flank flat.

REFERENCES:
patent: Re30018 (1979-06-01), Clemens et al.
patent: 320734 (1885-06-01), Whiteley
patent: 536813 (1895-04-01), MacPhail et al.
patent: 698991 (1902-04-01), Morse
patent: 717976 (1903-01-01), Dodge
patent: 984509 (1911-02-01), Crowder
patent: 1630313 (1927-05-01), Rorabeck
patent: 1808369 (1931-06-01), Munroe
patent: 2382740 (1945-08-01), Noffsinger
patent: 2934200 (1960-04-01), Fletcher et al.
patent: 3130791 (1964-04-01), Schmidt
patent: 3194609 (1965-07-01), Thurlow
patent: 3298406 (1967-01-01), Erickson
patent: 3377875 (1968-04-01), Sand
patent: 3448629 (1969-06-01), Pfrank et al.
patent: 3495468 (1970-02-01), Griffel
patent: 3604755 (1971-09-01), Krekeler
patent: 3824869 (1974-07-01), Murphy
patent: 3956943 (1976-05-01), Yamasaki
patent: 4016772 (1977-04-01), Clemens et al.
patent: 4036071 (1977-07-01), McKnight et al.
patent: 4089406 (1978-05-01), Teske et al.
patent: 4099423 (1978-07-01), Mullins
patent: 4116081 (1978-09-01), Luttrell et al.
patent: 4168634 (1979-09-01), Griffel
patent: 4174642 (1979-11-01), Martin et al.
patent: 4181033 (1980-01-01), Nagano
patent: 4200000 (1980-04-01), Fluehmann
patent: 4207777 (1980-06-01), Fluehmann
patent: 4274184 (1981-06-01), Nordtvedt
patent: 4294132 (1981-10-01), Matusz
patent: 4342560 (1982-08-01), Ledvina et al.
patent: 4378965 (1983-04-01), Ishii et al.
patent: 4401420 (1983-08-01), Kasuya et al.
patent: 4492030 (1985-01-01), Beerens
patent: 4509323 (1985-04-01), Ledvina et al.
patent: 4509937 (1985-04-01), Ledvina et al.
patent: 4521207 (1985-06-01), Husted
patent: 4522611 (1985-06-01), Hiatt
patent: 4531926 (1985-07-01), Reeves, Jr.
patent: 4559028 (1985-12-01), Reeves, Jr.
patent: 4571218 (1986-02-01), Reeves, Jr.
patent: 4604080 (1986-08-01), Mizuno
patent: 4653340 (1987-03-01), LaBate
patent: 4738653 (1988-04-01), Riewerts et al.
patent: 4758209 (1988-07-01), Ledvina
patent: 4758210 (1988-07-01), Ledvina
patent: 4813916 (1989-03-01), Valin
patent: 4832668 (1989-05-01), Ledvina et al.
patent: 4878886 (1989-11-01), Kitabayashi et al.
patent: 4889521 (1989-12-01), Nagano
patent: 4911032 (1990-03-01), Steele et al.
patent: 4915604 (1990-04-01), Nagai
patent: 4915675 (1990-04-01), Avramidis
patent: 4969371 (1990-11-01), Allen
patent: 5015218 (1991-05-01), Macchiarulo et al.
patent: 5022280 (1991-06-01), Boiko et al.
patent: 5073151 (1991-12-01), Nagano
patent: 5123878 (1992-06-01), Nagano
patent: 5133695 (1992-07-01), Kobayashi
patent: 5154674 (1992-10-01), Avramidis et al.
patent: 5162022 (1992-11-01), Kobayashi
patent: 5163826 (1992-11-01), Cozens
patent: 5318483 (1994-06-01), Reid et al.
patent: 5397278 (1995-03-01), Suzuki et al.
patent: 5427580 (1995-06-01), Ledvina et al.
patent: 5437581 (1995-08-01), Ledvina et al.
patent: 5437582 (1995-08-01), Romano
patent: 5470282 (1995-11-01), Ledvina et al.
patent: 5503598 (1996-04-01), Neuer et al.
International Standard ISO 606:1994(E), entitled "Short-pitch transmission precision roller chains and chain wheels." (19 pgs.).
DE-Vol. 46, Mechanical Design and Synthesis ASME 1992, entitled "On The Dynamic Analysis of Roller Chain Drives: Part 1--Theory." (pp. 431-439).

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