Back to results
US 4,062,552 AGranted
Tool-holder chuck
AssigneeDaishowa Seiki Co., Ltd.
InventorRyoichi Kitaguchi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeDaishowa Seiki Co., Ltd.
InventorRyoichi Kitaguchi
Estimating the term…
A tool-holder chuck for receiving therein a tool holder provided with various tools such as end mills or drills, etc., e.g. in a milling machine, which chuck can be changed easily when necessary, comprising a clamp including a nut which is threaded to a chuck body, a clamp ring which can move only in the coaxial direction against the body, and a plurality of rolling members that transmit at least the coaxial movement of the nut to the clamp ring when it is screwed in, projections on the tool holder being pressed inward by the coaxial movement of the clamp ring as a result of screwing of the nut, and a taper spindle of the holder, that interlocks with a tapered bore of the chuck body. In this way direct sliding friction against the projections is eliminated, and the tool holder can be clamped tightly, with relatively small screwing force of the nut, utilizing the sliding friction between the nut and the clamp ring.
A tool-holder chuck comprising a body (1) provided with a tapered bore (4) for receiving therein a taper spindle (25) of a tool holder (24) and a ring-shaped clamp (2) threaded coaxially to said body at the entrance of said bore, said clamp having a coaxial pressing surface (29) to push projections (26) of said tool holder inward, in the coaxial direction, said clamp including a nut (7) attached to a threaded portion (5) of said body, a clamp ring (8) movable only in the coxaial direction against said body, said ring having therein coaxial notches (18) to lead said projections to said coaxial pressing surface, and a plurality of rolling members (9) which transmit at least the coaxial movement of said nut to said ring when said nut is screwed, and can rotate in the circumferential direction, said ring with said notches leading said projections and said coaxial pressing surface.
Dependencies are inferred from the claim text.