Title:
MAIN SHAFT DEVICE AND METHOD FOR MANUFACTURING MAIN SHAFT DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/158248
Kind Code:
A1
Abstract:
Provided are a main shaft device and a method for manufacturing a main shaft device by which it is possible to maintain the quantity of grease inside a bearing at a stable level over a long period of time, and the lifespan of the grease is extended due to a lack of the need to perform long periods of running-in driving, thereby achieving a long lifespan. In a main shaft device (100), outer rings (41, 21) of roll bearings (40, 20) comprise base oil supply openings (47, 27) that penetrate in the radial direction, and a housing (103) comprises grease paths (133a)-(133e) that communicate with the base oil supply openings (47, 27). Grease is sealed in the bearing space of the roll bearings (40, 20). During operation of the main shaft device (100), the grease paths (133a)-(133e) constitute a grease reservoir.
Inventors:
OGURI SHOICHIRO (JP)
INAGAKI YOSHIFUMI (JP)
INAGAKI YOSHIFUMI (JP)
Application Number:
PCT/JP2021/048063
Publication Date:
July 28, 2022
Filing Date:
December 23, 2021
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B23B19/02; B23Q11/12; F16C19/06; F16C33/66; F16N7/12; F16N11/00; F16N31/00
Foreign References:
| JP2011163465A | 2011-08-25 | |||
| JPS5725298U | 1982-02-09 | |||
| JPS63123657A | 1988-05-27 | |||
| JPH0996316A | 1997-04-08 | |||
| JP2007182917A | 2007-07-19 | |||
| JP2021008786A | 2021-01-28 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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