METHOD FOR MANUFACTURING MULTI-STAGE GEAR, AND MULTI-STAGE GEAR

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 (JP)
INOSHITA HIROFUMI (JP)
SHIMODA KOJI (JP)
TOMIOKA AKINORI (JP)
MASUI TOSHIAKI (JP)
AOYAMA HIRONORI (JP)

Application Number:

PCT/JP2011/065704

Publication Date:

January 17, 2013

Filing Date:

July 08, 2011

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
SUKEDA TAKUYA (JP)
INOSHITA HIROFUMI (JP)
SHIMODA KOJI (JP)
TOMIOKA AKINORI (JP)
MASUI TOSHIAKI (JP)
AOYAMA HIRONORI (JP)

International Classes:

B21H5/00; F16H55/17; B21H5/02; B23P15/14

Foreign References:

JPH04289030A	1992-10-14
JP2002066686A	2002-03-05
JPS6141075A	1986-02-27
JPS6162663A	1986-03-31
JP2004074163A	2004-03-11
JP2009156369A	2009-07-16

Other References: