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Title:
BOOT FOR CONSTANT VELOCITY JOINT, METHOD OF PRODUCING BOOT FOR CONSTANT VELOCITY JOINT, AND DEVICE FOR PRODUCING BOOT FOR CONSTANT VELOCITY JOINT
Document Type and Number:
WIPO Patent Application WO/2007/034844
Kind Code:
A1
Abstract:
A technique for cutting after blow forming the lower end of an annular large diameter section of a boot body by using an existing cutting device as it is. The boot body (Pm) of a boot for a constant velocity joint has an annular small diameter section (P1), the annular large diameter section (P3), and an annular bellows section (P2) provided between the small diameter and large diameter sections. The small diameter section (P1) and the large diameter section (P3) are fitted on the constant velocity joint. To produce the boot, the boot body (Pm) is primarily formed and then it is subjected to a secondary forming by which a built up section (thick wall sections (T1), a thin wall section (T2)), having a varying wall thickness, is integrated with the outside of the large diameter section. The large diameter section has thin wall regions (F2) and thick wall regions (F1). The regions (F1, F2) are continuous to each other, the thin wall regions (F2) are circumferentially continuous along the thin wall sections, and the thick wall regions (F1) are recessed along the thick wall sections so as to be closer to the center of the boot than the thin wall regions. At the lower end of the thick wall regions are integrally formed extension sections (Pj) extending in a planar form in a radial direction along the bottom surface of the thick wall sections. Extension ends (E1) of the extension sections are continuous on the same circumference as lower ends of the thin wall regions (E2).

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Inventors:
SUEOKA, Kazuhiko (105, Sugaya 3-chome, Ageo-sh, Saitama 61, 3628561, JP)
末岡 一彦 (〒61 埼玉県上尾市菅谷3丁目105番地 株式会社フコク内 Saitama, 3628561, JP)
Application Number:
JP2006/318653
Publication Date:
March 29, 2007
Filing Date:
September 20, 2006
Export Citation:
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Assignee:
FUKOKU CO., LTD. (11-2, Shintoshin Chuo-k, Saitama-shi Saitama 24, 3306024, JP)
株式会社フコク (〒24 埼玉県さいたま市中央区新都心11番地2 Saitama, 3306024, JP)
SUEOKA, Kazuhiko (105, Sugaya 3-chome, Ageo-sh, Saitama 61, 3628561, JP)
International Classes:
F16D3/84; B29C49/02; F16J3/04; F16J15/52; B29L31/26
Foreign References:
JP2005023989A2005-01-27
JP2004249545A2004-09-09
JP2000079634A2000-03-21
JPH06234150A1994-08-23
JP2003202034A2003-07-18
Attorney, Agent or Firm:
IWAKI, Kenji (Suga Bldg. NO.5-605, 1-20-9 Nisi-Shimbash, Minato-ku Tokyo, 105-0003, JP)
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