Patent ID: 9682453
Date: 2017-06-20
CPC Classifications: B23Q,Y10T

Claim:
1. A tool changer for a machine tool, comprising: a spindle head supporting a spindle for rotation; a tool magazine provided with a plurality of grips configured to hold a tool on a periphery of the tool magazine; a magazine drive motor configured to turn the tool magazine about an indexing axis to index the tool; and a pivot pin about which the tool magazine pivots toward and away from the spindle head to set the tool magazine in a separated position and in a proximity position, respectively; wherein the tool magazine comprises a tool-magazine power transmission unit, the magazine drive motor comprises a magazine-drive-motor power transmission unit, the tool-magazine power transmission unit and the magazine-drive-motor power transmission unit are configured to engage with each other at all times between the proximity position and the separated position relative to the spindle head; the magazine drive motor is configured to be secured to an immovable portion of the machine tool, the magazine-drive-motor power transmission unit comprises a magazine-drive-motor-side gear secured to a shaft of the magazine drive motor, the tool-magazine power transmission unit comprises a tool-magazine-side gear secured to the tool magazine, said tool-magazine-side gear comprising a gear tooth surface meshing with the magazine-drive-motor-side gear, and a cross-section of the gear tooth surface of the tool-magazine-side gear taken along a plane containing the indexing axis of the tool magazine comprises a circular arc that constitutes a segment of an imaginary circle, wherein the pivot pin is located inside the imaginary circle.