Belt type infinite variable-speed drive

Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Load responsive

Reexamination Certificate

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Details

C474S017000, C474S023000

Reexamination Certificate

active

07004860

ABSTRACT:
A belt type infinite variable-speed drive using a ball-screw mechanism is compact and noise-free. A nut of the ball-screw mechanism is fixed to a casing and a threaded shaft is rotatably coupled to a movable pulley member through a ball bearing so that ball circulating portions on the nut will not rotate while the movable pulley member is movable axially. Also, the ball circulating portions, which are low in load bearing capacity, are oriented in such a direction that a load hardly acts on the ball-screw mechanism. This makes it possible to compactly and rationally design a belt type infinite variable-speed drive and to suppress noise due to vibration of balls in the ball circulating portions.

REFERENCES:
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patent: 4909776 (1990-03-01), Sakakibara et al.
patent: 4973288 (1990-11-01), Sakakibara et al.
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patent: 5080639 (1992-01-01), Sakakibara et al.
patent: 5094652 (1992-03-01), Sakakibara et al.
patent: 5173084 (1992-12-01), Lemieux
patent: 5295407 (1994-03-01), Hirose et al.
patent: 8-33170 (1996-03-01), None

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