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Title:
METHOD FOR MANUFACTURING MULTI-STAGE GEAR, AND MULTI-STAGE GEAR
Document Type and Number:
WIPO Patent Application WO/2013/008285
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for manufacturing a multi-stage gear for which there is no gap between a small-diameter gear and a large-diameter gear, and addresses the problem of providing this multi-stage gear. This method manufactures a multi-stage gear by forming gears having different diameters on the outer circumferential surface of a hollow cylindrical member to be processed, and has a first step wherein a small-diameter gear is formed on the outer circumferential surface, a second step wherein the ends of the member to be processed undergo plastic deformation and the diameters thereof are enlarged to form large-diameter gear parts, and a third step wherein large-diameter gears are formed by cutting the large-diameter gear parts.

Inventors:
SUKEDA Takuya (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
助田 拓也 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
INOSHITA Hirofumi (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
井下 寛史 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
SHIMODA Koji (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
霜田 好司 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
Application Number:
JP2011/065704
Publication Date:
January 17, 2013
Filing Date:
July 08, 2011
Export Citation:
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Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 〒4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町1番地 Aichi, 〒4718571, JP)
SUKEDA Takuya (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
助田 拓也 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
INOSHITA Hirofumi (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
井下 寛史 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
SHIMODA Koji (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
International Classes:
F16H55/17; B21H5/00; B21H5/02; B23P15/14
Foreign References:
JPH04289030A1992-10-14
JP2002066686A2002-03-05
JPS6141075A1986-02-27
JPS6162663A1986-03-31
JP2004074163A2004-03-11
JP2009156369A2009-07-16
Other References:
See also references of EP 2730811A4
Attorney, Agent or Firm:
COSMOS PATENT OFFICE (Annex 2nd Floor, Nagoya Center Building 2-22, Nishiki 2-chome, Naka-ku, Nagoya-sh, Aichi 03, 〒4600003, JP)
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Claims: