Torque adjustment control mechanism of a hand drill

Cutting by use of rotating axially moving tool – Tool or tool-support with torque-applying clutch

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Details

408124, 192150, 81473, B23B 4500

Patent

active

057384690

ABSTRACT:
A torque adjustment control mechanism connected between the motor housing base and chuck of a hand drill and controlled to adjust its output torque, including a connecting barrel connected to the motor housing base, a coupling member mounted within the connecting barrel and coupled to the motor housing base, a holder base fixedly secured to the connecting barrel, and adjustment cap threaded onto the front neck of the holder base to hold an index ring on the inside, and a plurality of holding down spring devices mounted in respective longitudinal through holes on the holder base and stopped between the coupling member and the index ring, wherein the output torque of the hand drill is adjusted by changing the holding down pressure of the holding down spring devices by turning the adjustment cap forwards or backwards relative to the holder base.

REFERENCES:
patent: 3002206 (1961-10-01), Johnson
patent: 4317511 (1982-03-01), Asai
patent: 4322186 (1982-03-01), Boling
patent: 4593800 (1986-06-01), Ness et al.
patent: 4898249 (1990-02-01), Ohmori
patent: 5277527 (1994-01-01), Yokota et al.
patent: 5545109 (1996-08-01), Hayakawa

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