Quick-release mechanism for screwdriver bits and the like

Details Quick-release mechanism for screwdriver bits and the like Quick-release mechanism for screwdriver bits and the like

B - Operations, Transporting

23

B

B23B 31/107 (2006.01) B23B 31/12 (2006.01) B23B 31/22 (2006.01) B25B 23/00 (2006.01)

Patent

CA 2315923

A holder for holding a tool, having an elongated housing, including a longitudinal hole having a cross-section corresponding to the cross-section of a mounting portion of the tool bit. The housing further has at least one radial hole running from an outside surface of the connector to the longitudinal hole. The radial hole contains a substantially spherical locking means movably arranged in the radial hole. The means cooperates with a circumferential groove in the tool bit to lock the tool bit in place when the tool bit is fully inserted into the holder. A sleeve is arranged to reciprocally slide over the first connector between two end positions. The sleeve is biased towards the tool by a first biasing means, and the sleeve has a step arranged on the inside of the sleeve, which step blocks the locking means when a tool is fully inserted into the longitudinal hole. A plunger is arranged to reciprocally slide inside the longitudinal hole, being pressed by a second biasing means towards the tool. An anchoring means holds the second biasing means securely fastened to the bottom of the longitudinal hole. The holder automatically locks the tool bit in the holder after insertion and automatically ejects the tool bit after the sleeve has been released.

Porte-outil à corps allongé présentant dans son axe longitudinal un orifice dont la section correspond à celle de la partie de l'outil qui sert à son montage. Le logement est en outre muni d'au moins un orifice radial débouchant, d'un côté, à l'extérieur du porte-outil et, de l'autre, dans le tube de guidage interne longitudinal. Cet orifice contient un mécanisme de bridage de forme essentiellement sphérique qui peut se déplacer dans l'orifice. Du fait de la rainure transversale que présente l'outil sur sa circonférence, le mécanisme bloque l'outil quand ce dernier est inséré. Le porte-outil est partiellement recouvert d'un fourreau qui peut glisser dans les deux sens entre deux positions extrêmes. Un premier dispositif a pour fonction (au repos) de maintenir le fourreau en position vers la partie avant de l'outil; le fourreau comprend à l'intérieur une partie en gradin qui bloque le mécanisme de bridage quand on insère l'outil. Le tube de guidage du porte- outil est muni à l'autre extrémité d'un plongeur pouvant se déplacer dans les deux sens et qu'un second dispositif de maintien en position presse contre l'outil. Ce mécanisme est solidement fixé au fond du tube de guidage. Le porte-outil bloque automatiquement l'outil au moment de son insertion et l'éjecte automatiquement quand on agit sur le fourreau.

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