Title:
MAIN SHAFT DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/143578
Kind Code:
A1
Abstract:
The present invention is applicable to a main shaft device for a machine tool or the like. In this main shaft device, a double-row cylindrical roller bearing (4) and thrust-load-supporting bearings (5F, 5R) are arranged side by side in that order from the front-side end, between a front-side portion of a main shaft (1) and a housing (2). In the fitting of an outer ring (42) of the double-row cylindrical roller bearing (4) to the housing (2), a roller row section (4B) at the side of the thrust-load-supporting bearings has a greater clearance than a roller row section (4A) at the opposite side to the thrust-load-supporting bearings, and thus the outer ring (42) and the housing (2) are fitted together loosely at the roller row section (4B) at the side of the thrust-load-supporting bearings.
Inventors:
MIZUTANI MAMORU (JP)
UEDA KEIICHI (JP)
UEDA KEIICHI (JP)
Application Number:
PCT/JP2016/056035
Publication Date:
September 15, 2016
Filing Date:
February 29, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B23B19/02; B23Q11/12; F16C19/16; F16C19/28; F16C19/56; F16C33/32; F16C33/34; F16C33/64; F16C35/067; F16C35/12; F16C37/00
Foreign References:
| JP2008133887A | 2008-06-12 | |||
| JP2006322496A | 2006-11-30 | |||
| JP2006326695A | 2006-12-07 | |||
| JP2006300079A | 2006-11-02 |
Other References:
See also references of EP 3269477A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)
Shuji Sugimoto (JP)
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