Cam mounting for an impact tool

Details Cam mounting for an impact tool Cam mounting for an impact tool

1977-01-14

1978-04-04

Hafer, Robert A.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173123, B25D 900

Patent

active

040821510

ABSTRACT:
A motor driven cam and spring impact tool with an improved mounting for the cam. The impact tool includes a driving shaft for rotation relative to the housing. A hammer is positioned in the housing for axial movement with respect to the housing. An annular cam with cam rollers translates the rotational motion of the driving shaft to reciprocating motion of the hammer. A spring urges the hammer in one direction to cause an impact upon each reciprocation. A collar, driven by the shaft, is connected to the cam or selectively to the rollers for rotating one with respect to the other. The non rotating member is attached to the hammer to cause reciprocation. A pair of pins are connected between the cam and selectively the collar or hammer, and spaced apart 180.degree. to allow the cam to tip about the axes of the pins. This equalizes the load imposed by the rollers upon the cam.

REFERENCES:
patent: 3256946 (1966-06-01), Jansen et al.
patent: 3302732 (1967-02-01), Roll
patent: 3322208 (1967-05-01), Skoog
patent: 3566978 (1971-03-01), Voert
patent: 3774700 (1973-11-01), Shepherd

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