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Title:
BOOT FOR CONSTANT VELOCITY UNIVERSAL JOINT
Document Type and Number:
WIPO Patent Application WO/2007/032301
Kind Code:
A1
Abstract:
A boot for a constant velocity universal joint formed in a compact shape and capable of preventing its bellows part from being pinched at an outer ring opening part. The boot for the constant velocity universal joint comprises a large diameter part (11) fitted to the opening end part of the outer joint member (4) of the constant velocity universal joint (2), a small diameter part fitted to a shaft connected to the inner joint member (6) of the constant velocity universal joint (2), and the bellows part (13) formed between the large diameter part (11) and the small diameter part (12) and having peaks (16) and valleys (15) alternately disposed along the axial direction. The peaks (16) are positioned adjacent to the large diameter part (11) and the small diameter part (12). The wall thicknesses of the peaks (16) and the valleys (15) at the small diameter part (12) are set smaller than those of the peaks (16) and the valleys (15) at the axial center part as reference wall thicknesses. The wall thicknesses of the peaks (16) and the valleys (15) at the large diameter part (11) are set larger than those of the reference wall thickness of the reference peaks (16) and the valleys (15). The wall thickness of the peak (16) adjacent to the large diameter part (11) is set equal to the reference wall thickness of the reference peaks (16).

Inventors:
UENO, Tsuyoshi (1578 Higashikaizuk, Iwata-shi Shizuoka 37, 4380037, JP)
上野 剛 (〒37 静岡県磐田市東貝塚1578番地 NTN株式会社内 Shizuoka, 4380037, JP)
TOMIYAMA, Mikio (1578 Higashikaizuk, Iwata-shi Shizuoka 37, 4380037, JP)
富山 幹男 (〒37 静岡県磐田市東貝塚1578番地 NTN株式会社内 Shizuoka, 4380037, JP)
HARADA, Shintaro (1578 Higashikaizuk, Iwata-shi Shizuoka 37, 4380037, JP)
Application Number:
JP2006/317963
Publication Date:
March 22, 2007
Filing Date:
September 11, 2006
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-k, Osaka-shi Osaka 03, 5500003, JP)
NTN株式会社 (〒03 大阪府大阪市西区京町堀1丁目3番17号 Osaka, 5500003, JP)
UENO, Tsuyoshi (1578 Higashikaizuk, Iwata-shi Shizuoka 37, 4380037, JP)
上野 剛 (〒37 静岡県磐田市東貝塚1578番地 NTN株式会社内 Shizuoka, 4380037, JP)
TOMIYAMA, Mikio (1578 Higashikaizuk, Iwata-shi Shizuoka 37, 4380037, JP)
富山 幹男 (〒37 静岡県磐田市東貝塚1578番地 NTN株式会社内 Shizuoka, 4380037, JP)
International Classes:
F16D3/84; F16J3/04; F16J15/52
Foreign References:
JPH08135675A1996-05-31
JP2002257152A2002-09-11
JPH04160229A1992-06-03
US5645286A1997-07-08
DE19844987A11999-04-01
JP2525619Y21997-02-12
JPH0710561U1995-02-14
JPH0682463U1994-11-25
JP2002257152A2002-09-11
JPH06129536A1994-05-10
JPH08135675A1996-05-31
JPH0738758U1995-07-14
Other References:
See also references of EP 1925838A4
Attorney, Agent or Firm:
EHARA, Syogo et al. (Ehara Patent Office, 15-26 Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 5500002, JP)
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