Electric wrench driving system

Details Electric wrench driving system Electric wrench driving system

1998-10-27

1999-08-24

Smith, Scott A.

Tool driving or impacting

Impacting devices

With anvil arranged to transmit torsional impact to tool

173 93, 173117, 173176, B23Q 500, B25B 1500

Patent

active

059413190

ABSTRACT:
An electric wrench driving system, comprising a motor; a catching system; and a shaft. The catching system is driven by the motor in a rotational movement and further comprises a main body; a catching piece, mounted on the main body and oriented along the direction of the rotational movement, with a heavy end and a light end; a blocking rod; an eccentric arm; and a spring, pulling on the eccentric arm to fix the catching piece on the blocking rod below a threshold velocity of the rotational movement. The shaft has an insertion piece to be engaged by the catching piece for driving the shaft. When the threshold velocity of the rotational movement is exceeded, the eccentric arm releases the catching piece, and in a regular direction of the rotational movement the heavy end is pulled outward, with the light end engaging with the insertion piece of the shaft, driving the shaft. In a reverse direction of the rotational movement the heavy end is pulled outward, with the light end bumping against the insertion piece of the shaft, such that the heavy end engages with the insertion piece of the shaft, driving the shaft.

REFERENCES:
patent: 2940566 (1960-06-01), Conover, Jr.
patent: 4947939 (1990-08-01), Hung
patent: 5435398 (1995-07-01), Juan
patent: 5740892 (1998-04-01), Huang
patent: 5839518 (1998-11-01), Setsuko

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