US 7,581,473 B2 · Tool holder and machine tool equipped with the tool holder

Abstract

The present invention provides a tool holder interchangeably attached to a machine tool such as a combined machining lathe. A combined machining lathe 1 comprises main spindles 20 and 30 for gripping a workpiece, and a machining main spindle head 50 which rotates around a B axis. There are provided stockers S1 and S2 inside the lathe, and tool holders 200 and 300 are respectively stored in the stockers S1 and S2. The tool holder 200 comprises a taper shank portion 230 of a main shaft in a housing 210 and four pull studs PS2 around the taper shank portion 230 of a main shaft, and is gripped by collet chucks of the machining main spindle head 50. Rotation of the taper shank portion 230 of a main shaft is transmitted to a shaft 250 via a gear mechanism, to drive a drill tool 252 to drill a deep hole.

Claims2

Dependent claims

A tool holder interchangeably attached to a machining main spindle head of a machine tool, comprising:

a housing;
a driving main shaft including a taper shank portion disposed in a center of the housing;
a driving shaft disposed parallel to the driving main shaft and supported by a bearing;
a gear mechanism for transmitting rotation between the driving main shaft and the driving shaft;
a tool disposed at an end of the driving shaft;
and
four pull studs disposed around an outer circumference of the housing, wherein
the four pull studs are gripped by four collet chucks disposed in the machining main spindle head of the machine tool to rigidly hold the housing in the machining main spindle head, and the driving main shaft is inserted into a machining main spindle of the machine tool so as to be supported by a bearing of the machining main spindle.

5 more elements

Dependencies are inferred from the claim text.

Tool holder and machine tool equipped with the tool holder

Life of this patent

Tool holder and machine tool equipped with the tool holder

Life of this patent

Abstract

Claims2