Endless belt power transmission systems or components – Positive drive belt – Belt formed of rigid links
Patent
1990-04-12
1991-06-25
Bui, Thuy M.
Endless belt power transmission systems or components
Positive drive belt
Belt formed of rigid links
474215, 474245, F16G 1302
Patent
active
050263315
ABSTRACT:
An improved rocker joint pin type CVT chain has link plates connected by rocker joints, each including a rocker pin and a seat pin in an insertion bore of the link plate, the rocker pin and the seat pin making rolling contact along opposing rolling arcuate surfaces thereof as the chain bends and straightens when passing around a pulley. At respective minimums, the sectional area of the link plate formed between the link plate insertion bore and the outer periphery of the link plate relative to the pulley, is greater than the sectional area formed between the link plate insertion bore and the inner periphery. The radii of curvature of the inner rolling contact surfaces of the rocker pin and seat pin are smaller than those of the outer rolling contact surfaces. The fatigue strength at the minimum sectional area portions is thereby increased and the deviation from the chain center line of the contact point of the opposing rolling contact surfaces is minimized in a straightened position of the chain, thereby reducing the load applied to the inner minimum sectional area portion.
REFERENCES:
patent: 2725755 (1955-12-01), Riopelle et al.
patent: 4507106 (1985-03-01), Cole, Jr.
patent: 4801289 (1989-01-01), Sugimoto et al.
patent: 4878887 (1989-11-01), Sakakibara et al.
patent: 4904231 (1990-02-01), Zimmer
Fujimoto Nobuyuki
Hosokawa Toshihiro
Sasamoto Shuji
Sugimoto Yoshiaki
Uchiumi Yutaka
Bui Thuy M.
Tsubakimoto Chain Co.
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