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Patent Searching and Data


Title:
LATHE
Document Type and Number:
WIPO Patent Application WO/2019/202780
Kind Code:
A1
Abstract:
Provided is a lathe in which a main shaft can be shortened. A lathe 1 is provided with: a main shaft 12; a main shaft support portion 11 that supports, at the outer side S4 of the main shaft 12, the main shaft 12 via a bearing B0; a collet 25 disposed at a front end 13 of the main shaft 12; an inner ring holding portion (40) that is provided to the main shaft 12 and that holds the front side S1 of an inner ring B1 of the bearing B0; an outer ring holding portion (50) that is provided to the main shaft support portion 11 and that holds, at the outer side S4 of the inner ring holding portion (40), the front side S1 of an outer ring B2 of the bearing B0; a cap member (60) that is, at the front side S1 of the inner ring holding portion (40), screwed on the main shaft 12 and that is disposed at the outer side S4 of the collet 25 centered on the main shaft center line AX0; and a cover member (70) that has an inner circumferential surface 71 opposed to the outer circumferential surface 62 of the cap member (60) and that is provided on the main shaft support portion 11 side in an attachable/detachable manner. The lathe 1 has, between the inner circumferential surface 71 of the cover member (70) and the outer circumferential surface 62 of the cap member (60), a first air purge section P1 to which air 100 for air purging is supplied.

Inventors:
DENO MASATOSHI (JP)
SUZUKI DAISUKE (JP)
Application Number:
PCT/JP2018/048030
Publication Date:
October 24, 2019
Filing Date:
December 27, 2018
Export Citation:
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Assignee:
STAR MFG CO (JP)
International Classes:
B23B31/00; B23B19/02; B23B31/20; B23Q11/00
Foreign References:
JPH0639303U1994-05-24
JPH08215907A1996-08-27
JP2009085340A2009-04-23
JP2001096438A2001-04-10
JP2000018395A2000-01-18
JP2015066648A2015-04-13
Other References:
See also references of EP 3769883A4
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