Method of manufacturing gear from metal sheet and the gear manufactured by the method

A metal plate and gear technology, which is applied in the directions of gears, elements with teeth, belts/chains/gears, etc., can solve the problems of the decrease of the productivity of the disc 100 and the increase of the manufacturing cost of the disc 100, and achieve the effect of eliminating burrs
CN101402124AInactive Publication Date: 2009-04-08DENSO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DENSO CORP
Publication Date
2009-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a gear manufacturing method and a gear manufactured by the method. A gear is manufactured in a half blanking stage, a punching stage and a separating stage. In the half blanking stage, half blanking is performed for a columnar portion of a metal sheet. A part of an outer circumferential surface of the blank is disconnected from the other portion of the sheet, while the other part of the outer circumferential surface of the blank is connected with the other portion of the sheet. In the punching stage, an inner portion of the blank is punched in a punching direction to form teeth on an inner circumferential surface of the blank. In the separating stage, the blank is separated from the other portion of the sheet as a gear toward a separation direction opposite to the punching direction by disconnecting the other part of the outer circumferential surface of the blank from the other portion of the sheet.
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Description

technical field

[0001] The present invention relates generally to a method of manufacturing a gear from a metal plate, and more particularly to a method of manufacturing a gear through the stages of: creating a blank from a metal plate, forming teeth on the inner or outer peripheral surface of the blank Profiles and blanks cut from sheet metal for gears. The invention also relates to gears produced by this method. Background technique

[0002] In order to start a driving operation of an engine installed in a vehicle, a starter is used to transmit rotational force generated in a motor to the engine while reducing the rotational speed of the force. For example, a reduced rotation speed type starter is disclosed in published Japanese Patent First Publication No. 2005-113816. The starter has a multi-disc shock absorber to prevent excessive torque transfer in the engine. The shock absorbing device has an internal gear meshing with a plurality of planetary gears to reduce a rot...

Claims

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