Tool holder for a rotary tool with improved threaded bushing for optimized socket wrench tool

Abstract

Tool holder (1) for a rotary tool (4), comprising a sleeve-shaped base component (2) on which an internal thread (20) is formed, a threaded bushing (21) with a radial inner surface (25) and with a radial outer surface (26), wherein the radial inner surface (25) of the threaded bushing (21) defines a bore (24) and the bore (24) has a primary inner diameter (30) in the longitudinal direction (13) at a primary section (28) and a secondary inner diameter (31) at a secondary section (29), and the primary radial inner diameter (30) is smaller than the secondary radial inner diameter (31), such that an axial stop (32) is formed between the primary section (28) and the secondary section (29) of the threaded bushing (21),A feed tube (33) with a radial inner surface (36) and a radial outer surface (37) for guiding a cooling and / or lubricating fluid from the machine tool into the at least one channel (7) of the rotary tool (4), wherein the radial inner surface (36) of the feed tube (33) defines a feed channel (38) for the cooling and / or lubricating fluid, a primary seal (42) is arranged in a primary annular space (40), and a secondary seal (43) is arranged in a secondary annular space (41), wherein the threaded bushing (21) comprises recesses (67) for the insertion of pins (78) of a tool (74), in particular a socket wrench tool (74), and the tangential extension (71, 72) of the recesses (67) extends from the rear axial end (23) of the threaded bushing (21) to the front axial end (22) of the threaded bushing. (21) increases, in particular steadily increases.

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