Title:
TORSIONAL DAMPER
Document Type and Number:
WIPO Patent Application WO/2021/124818
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a torsional damper with a rubber ring that is extremely resistant to damage from heat generation. To address the above-mentioned problem, the invention provides a torsional damper equipped with a hub that is fixed to a rotary shaft and has an outer circumferential surface circumferentially around the rotary shaft, an annular vibration ring that has an inner circumferential surface circumferentially around the rotary shaft and with a diameter larger than that of the outer circumferential surface of the hub, and a rubber ring that is present in a compressed state between the outer circumferential surface of the hub and the inner circumferential surface of the vibration ring, is formed from a rubber composition containing EPDM as a main component, and has a loss coefficient (tan δ) of 0.18 or more when the surface temperature is 60 ± 5°C, wherein when subjected to a resonance point tracking method, the maximum attained surface temperature (Tmax) of the rubber ring during continuous excitation at the resonance point and the rubber fitting width (b) satisfy a specific relational expression.
Inventors:
SAWATSUBASHI KEI (JP)
Application Number:
PCT/JP2020/043857
Publication Date:
June 24, 2021
Filing Date:
November 25, 2020
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
F16F15/12; F16F15/126
Foreign References:
| JP2018096455A | 2018-06-21 | |||
| JP2007009073A | 2007-01-18 | |||
| JP2018096455A | 2018-06-21 | |||
| JP2019230165A | 2019-12-20 |
Other References:
See also references of EP 4080083A4
Attorney, Agent or Firm:
MIGITA, Shunsuke et al. (JP)
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