Drill and/or impact hammer

Details Drill and/or impact hammer Drill and/or impact hammer

1993-06-25

1994-08-16

Rada, Rinaldi I.

Tool driving or impacting

Drive controlled by relative axial movement of tool

173 48, 173109, B25D 1110

Patent

active

053378350

ABSTRACT:
An impact hammer has a housing, a motor accommodated in the housing, an impacting mechanism accommodated in the housing and having a driver and a striker which is displaced by the driver in an axial direction and periodically strikes a shaft of a tool with the driver being tiltable about a tilting axis, a driving element which drives the driver into a reciprocating motion and a shaft which rotates the driving element. The driving element is provided with two interengaging eccentric parts including a first eccentric part which is non-rotatably connected with the shaft and a second eccentric part which is axially displaceable relative to the shaft. The eccentric parts have ring surfaces each surrounding the shaft, arranged asymmetrically relative to one another and being in contact with one another. The ring surfaces are offset relative to the one another so that a resulting eccentricity of the driving element relative to the shaft, which eccentricity acts on the driver, is adjustable between zero and a maximal value.

REFERENCES:
patent: 4284148 (1981-08-01), Wanner et al.
patent: 4325436 (1982-04-01), Richter et al.
patent: 4529044 (1985-07-01), Klueber et al.
patent: 4750567 (1988-06-01), Grossmann et al.
patent: 5036925 (1991-08-01), Wache
patent: 5159986 (1992-11-01), Hoser

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