Power tool

Details Power tool Power tool

1992-11-25

1994-11-08

Smith, Scott A.

Tool driving or impacting

Means to drive tool about an axis

Electric motor

173117, 310 52, 310 90, B25D 1104, H02K 922

Patent

active

053618530

ABSTRACT:
A power tool comprises an outer casing, a drive motor disposed in the casing for driving a tool member, a drive shaft extending from the drive motor, an electric element of operating the drive motor, a heat radiating block secured to the drive motor, a power control element secured to the heat radiating block for controlling a rotation number of the drive motor, and a mechanism for preventing a rotation of the drive motor in engagement of the heat radiating block with the outer casing. The rotation preventing mechanism comprises an engaging member integrally formed to the heat radiating block and a member formed to the casing to be engageable with the engaging member. The power tool further comprises a speed reduction mechanism connected to the drive motor for reducing the driving speed of the drive motor and a rotation transmitting mechanism operatively connected to the speed reduction mechanism for transmitting the rotation of the drive motor to the tool member. The speed reduction mechanism includes a rotating portion having a pinion and the rotation transmitting mechanism includes a shaft having one end connected to the rotating portion of the speed reduction mechanism and another end connected to the tool member, the one end of the shaft being provided with a hole into which said rotating portion is rotatably inserted.

REFERENCES:
patent: 3824684 (1974-07-01), Wheeler
patent: 3831048 (1974-08-01), Wagner
patent: 5006740 (1991-04-01), Palm

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