Title:
TORSIONAL DAMPER
Document Type and Number:
WIPO Patent Application WO/2021/124821
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a torsional damper for which damage to a rubber ring due to the generation of heat is extremely unlikely to occur. This problem is solved by means of a torsional damper provided with: a hub affixed to a rotary shaft and having an outer-circumferential surface along a circle centered on the rotary shaft; an annular oscillation ring having an inner-circumferential surface the diameter of which is larger than the outer-circumferential surface of the hub on a circle centered on the rotary shaft; and a rubber ring that exists in a compressed state between the outer-circumferential surface of the hub and the inner-circumferential surface of the oscillation ring, comprises a rubber composition the main component of which is EPDM, and has a loss coefficient (tanδ) of 0.18 or higher when the surface temperature is 60±5°C. When subjected to resonance point tracking, the fitting diameter (d) and the maximum attained surface temperature (Tmax) of the rubber ring during continuous excitation at the resonance point satisfy a prescribed relational expression.
Inventors:
OKADA TOMOYUKI (JP)
Application Number:
PCT/JP2020/043860
Publication Date:
June 24, 2021
Filing Date:
November 25, 2020
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
F16F15/126
Foreign References:
| JP2018096455A | 2018-06-21 | |||
| JP2007009073A | 2007-01-18 | |||
| JP2018096455A | 2018-06-21 | |||
| JP2019230169A | 2019-12-20 |
Other References:
See also references of EP 4080086A4
Attorney, Agent or Firm:
MIGITA, Shunsuke et al. (JP)
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