Title:
BACKUP ROLL UNIT FOR TENSION LEVELER
Document Type and Number:
WIPO Patent Application WO/2022/065308
Kind Code:
A1
Abstract:
Provided is a backup roll unit that suppresses increases in rotational torque and leakage of lubricant in a structure in which a solid lubricant is sealed in a ball bearing supporting a backup roll. The backup roll unit 1 is for a tension leveler in which a ball bearing 2 rotatably supporting a roll 4 with respect to a shaft 3 is arranged between the roll 4 and the shaft 3. The ball bearing 2 has an inner race 5 and an outer race 6 which are bearing rings, a plurality of balls 8 interposed between the inner race 5 and the outer race 6, and a holder 7 for holding the balls 8. A solid lubricant 9 is sealed in the bearing interior space of the ball bearing 2, and the total volume of the solid lubricant 9 is 30-40% of the volume of the bearing interior space.
Inventors:
YAGI TAKASHI (JP)
OZU TAKUYA (JP)
OZU TAKUYA (JP)
Application Number:
PCT/JP2021/034595
Publication Date:
March 31, 2022
Filing Date:
September 21, 2021
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B21D1/05; F16C13/00; F16C13/02; F16C19/06; F16C33/42; F16C33/66
Foreign References:
| JP2007285346A | 2007-11-01 | |||
| JP2019155400A | 2019-09-19 | |||
| JP2003239998A | 2003-08-27 | |||
| JPH076525U | 1995-01-31 |
Attorney, Agent or Firm:
WAKI Hikaru et al. (JP)
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