Coupling arrangement for a drill shank of a percussion drilling

Details Coupling arrangement for a drill shank of a percussion drilling Coupling arrangement for a drill shank of a percussion drilling

1985-06-07

1987-10-27

Kazenske, E. R.

Tool driving or impacting

Impacting devices

With means for rotating tool

175415, B23B 4516

Patent

active

047023260

ABSTRACT:
A coupling arrangement for a percussion drilling machine for coupling of a shank (7) unrotatably to a frame bushing (2) rotatably mounted in a frame and rotated by a rotating device. The frame bushing is provided with axial driving grooves (12) opening towards the shank and the shank is provided with axial counter grooves (13) opening towards the frame bushing. Rod-like wedge pieces (11) are mounted each in a pair of grooves formed by the grooves. The cross-section of each wedge piece comprises an arched surface portion (11a) and at least one planar surface portion (11b). Such wedge piece can adjust its position by turning in one groove of the pair of grooves so that the planar surface of the wedge piece is pressed into a planar contact with the planar surface of the other groove.

REFERENCES:
patent: 3517754 (1970-06-01), Hughes
patent: 3595593 (1971-07-01), Gold
patent: 3866746 (1975-02-01), Corington
patent: 4491445 (1985-01-01), Hunger et al.

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