Device of a tool spindle

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 31/30 (2006.01) B23B 31/26 (2006.01) B23Q 1/70 (2006.01) B23Q 11/12 (2006.01)

Patent

CA 2367267

Arrangement for a tool spindle equipped with a rotor (22) of an electric driving motor. It is distinguished in that the rotating part (1, 3) of the tool spindle is accommodated in a unit (4) that is stationary in relation to the rotating part, that the rotating part (1, 3) has at least one axial channel (12a, 12b or 12d) extending to the area for the rotor (22) for leading coolant fluid to the said area (20a, 26), that the stationary unit (4) is provided with an inlet (16, 14 or 25) for leading cooling fluid to the channel (12a, 12b or 12d), that a gap sealing is arranged on either side of the inlet (16, 14 or 25) between the stationary unit (4) and the rotating part (1, 3) and forms a dynamic bearing during the rotation of this, and that a channel is arranged to lead away the coolant fluid.

Cette invention concerne un agencement destiné à une broche porte-outil équipée d'un inducteur (22) de moteur d'entraînement électrique. La particularité de cet agencement réside dans les faits suivants: la partie rotative (1, 3) de cette broche porte-outil est adaptée dans une unité (4) en relation fixe avec la partie rotative, la partie rotative (1, 3) possède au moins un canal axial (12a, 12b ou 12d) situé sur la zone de l'inducteur (22) de façon à amener un liquide réfrigérant dans ladite zone (20a, 26), l'unité fixe (4) possède un orifice d'entrée (16, 14 ou 25) permettant d'amener un liquide réfrigérant au canal (12a, 12b ou 12d), un écran est agencé de chaque côté de l'orifice d'entrée (16, 14 ou 25) entre l'unité fixe (4) et la partie rotative (1, 3) formant un palier dynamique durant sa rotation, et un canal est agencé de façon à évacuer le liquide réfrigérant.

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