Tool holder device
AssigneeHilti Aktiengesellschaft
InventorsGerhard Rumpp, Manfred Spieth, Dieter Scholz
Life of this patent
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Abstract
A tool holder for a drill capable of performing only rotary drilling or the combination of rotary and percussive drilling includes a tubular retainer member in which the shank of a tool can be inserted. Locking members mounted in the retainer member fit into recesses in the tool shank for holding it in the retainer member. During percussive drilling the locking members are axially displaceable in the recesses and the tool experiences a certain amount of axial play, however, when only rotary drilling is performed the locking members are held against axial displacement by stops so that the tool does not have any axial play. One stop forms a part of the retainer member and another stop is part of a member slidably displaceable relative to the retainer member.
Claims14
Tool holder for a drill capable of both only rotary drilling and the combination of rotary and percussive drilling and arranged to receive and hold an axially extending tool shank with the tool shank having axially extending closed ended recesses therein, comprising an axially extending sleeve-like retainer member arranged to receive the tool shank therein, locking members mounted in said retainer member and capable of removable engagement in the axially extending closed ended recesses in the tool shank, said locking members dimensioned in the axial direction of said retaining member so as to be axially displaceable in the recesses in the tool shank, stop means for engagement with said locking members for holding said locking members against axial displacement in the recesses in the tool shank, and said stop means being axially displaceable relative to said locking members for movement between a first position wherein only rotary drilling can be effected and a second position where the combination of rotary and percussive drilling can be effected.
Dependencies are inferred from the claim text.