Title:
THRUST WASHER
Document Type and Number:
WIPO Patent Application WO/2022/091538
Kind Code:
A1
Abstract:
Provided is a thrust washer that can reduce torque and wear, decrease the torque amplitude width, and suppress oil burns. This thrust washer is such that the longitudinal direction of oil grooves 40 provided in at least one surface of a ring-shaped member 30 forms an angle of 40-75 degrees in relation to the radial direction of the ring-shaped member. The oil grooves 40 are disposed at equal intervals in the circumferential direction of the ring-shaped member 30, include a communicating oil groove 40A and a non-communicating oil groove 40B, which is provided so as to extend to an edge of an outer circumferential end 34, and are arranged so as to have cyclic regularity in relation to the circumferential direction of the ring-shaped member 30. In addition, a communicating oil groove area ratio indicated by equation (1) below is 0.15-0.85. • Equation (1) Communicating oil groove surface area ratio = S1/(S1 + S2) [in equation (1), S1 denotes the sum total of the plane area of the respective communicating oil grooves 40A, S2 denotes the sum total of the plane area of the non-communicating oil grooves 40B, n denotes the total number of communicating oil grooves 40A, and m denotes the total number of non-communicating oil grooves 40B.]
Inventors:
NOGUCHI HIDEYOSHI (JP)
YOKOYAMA YASUYUKI (JP)
YOKOYAMA YASUYUKI (JP)
Application Number:
PCT/JP2021/030962
Publication Date:
May 05, 2022
Filing Date:
August 24, 2021
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16C17/04; F16C33/20
Foreign References:
| JP2020101239A | 2020-07-02 | |||
| JP2011069460A | 2011-04-07 |
Other References:
See also references of EP 4012208A4
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
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