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Title:
SWITCHING TYPE LIQUID−CONTAINED VIBRATION ISOLATOR
Document Type and Number:
WIPO Patent Application WO/2003/008838
Kind Code:
A1
Abstract:
A switching type liquid−contained vibration isolator designed so that switching between atmospheric pressure introduction and negative pressure introduction into a switching chamber causes an orifice to open and close so as to cope with shake vibration and idle vibration, wherein in order to prevent the coming−off of a pipe for introduction of atmospheric pressure and negative pressure into the switching chamber, first and second attachments (1, 2) are connected by a vibration isolation base body (3), the latter having disposed in the internal space thereof a partition member (4) and first and second diaphragms (5, 6), inner and outer orifices (12, 13) establishing communication between a main liquid chamber (7) and a secondary liquid chamber (8), the first and second diaphragms (5, 6) defining therebetween a balance chamber (9), the second diaphragm (6) and second attachment (2)defining therebetween a switching chamber (10), the central portion of the bottom wall (22) of the second attachment (2) being collapsed to the switching chamber (10), with a pipe (11) passing through the top (25a) of the collapsed portion (25) and received in the collapsed portion (25), the bottom wall (22) around the collapsed portion (25) being provided with a plurality of interference avoiding projections (29) projecting outward.

Inventors:
Kodama, Yosei c/o Toyo Tire & Rubber Co. (Ltd. 17-18 Edobori 1-chom, Nishi-ku Osaka-shi Osaka, 550-0002, JP)
Takashima, Yukio c/o Toyo Tire & Rubber Co. (Ltd. 17-18 Edobori 1-chom, Nishi-ku Osaka-shi Osaka, 550-0002, JP)
Yoshida, Nobuya c/o Toyota Motor Corporation 1 (Toyota-cho Toyota-shi, Aichi, 471-8571, JP)
Miyake, Takashi c/o Toyota Motor Corporation 1 (Toyota-cho Toyota-shi, Aichi, 471-8571, JP)
Application Number:
PCT/JP2001/006142
Publication Date:
January 30, 2003
Filing Date:
July 16, 2001
Export Citation:
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Assignee:
TOYO TIRE & RUBBER CO., LTD. (17-18, Edobori 1-chome Nishi-ku Osaka-shi, Osaka, 550-0002, JP)
Kodama, Yosei c/o Toyo Tire & Rubber Co. (Ltd. 17-18 Edobori 1-chom, Nishi-ku Osaka-shi Osaka, 550-0002, JP)
Takashima, Yukio c/o Toyo Tire & Rubber Co. (Ltd. 17-18 Edobori 1-chom, Nishi-ku Osaka-shi Osaka, 550-0002, JP)
Yoshida, Nobuya c/o Toyota Motor Corporation 1 (Toyota-cho Toyota-shi, Aichi, 471-8571, JP)
Miyake, Takashi c/o Toyota Motor Corporation 1 (Toyota-cho Toyota-shi, Aichi, 471-8571, JP)
International Classes:
F16F13/26; (IPC1-7): F16F13/26
Foreign References:
JPH09144805A
JP2000337428A
JP2001099223A
JP2000310274A
JPH09196110A
US5462261A
Attorney, Agent or Firm:
Tsutada, Akiko (9th Floor, Nissei Bingomachi Bldg. 7-10 Bingomachi 1-chom, Chuo-ku Osaka-shi Osaka, 541-0051, JP)
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