Flexible boot for constant velocity universal joint and constant velocity universal joint
AssigneesNtn Corporation, Keeper Corporation
InventorsMika Kohara, Sho Takeshita, Hiroshi Murakami, Shuichi Sato, Rina Ozawa, Kouji Masujima
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Abstract
A flexible boot for a constant velocity universal joint includes: attachment portions to a mating member at both ends; and a bent portion provided between the attachment portions and absorbing deformation caused by operation of a constant velocity universal joint. The flexible boot is made of a rubber material obtained by blending 50 to 80 parts by weight of HNBR having an acrylonitrile content of 15 to 21 wt % and 20 to 50 parts by weight of EPDM, the rubber material having an elastic recovery rate of 18% or more at −40° C. in a TR test.
Claims4
A flexible boot for a constant velocity universal joint comprising:
- attachment portions to a mating member at both ends;
- and
- a bent portion provided between the attachment portions and absorbing deformation caused by operation of a constant velocity universal joint,
- the flexible boot being made of a rubber material obtained by blending 50 to 80 parts by weight of HNBR having an acrylonitrile content of 15 to 21 wt % and 20 to 50 parts by weight of EPDM,
- the rubber material having an elastic recovery rate of 18% or more at −40° C. in a TR test.
Dependencies are inferred from the claim text.