CLUTCH-PLATE HOLDING CYLINDRICAL PART AND PRESS MOLDING METHOD THEREFOR

Title:

CLUTCH-PLATE HOLDING CYLINDRICAL PART AND PRESS MOLDING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/035422

Kind Code:

A1

Abstract:

The purpose of the present invention is to extend the retention time of clutch oil, thus allowing efficient cooling of a clutch plate. A clutch hub (42) that is engaged, on the outer circumference thereof, with the clutch plate is press-molded from a single steel plate, and a plurality of clutch-plate-cooling oil grooves (74-4) each extending in the axial direction are formed on an inner circumferential surface thereof at intervals in the circumferential direction. A weir (76) that serves as a press molded section extending radially inward is formed at an end section of each of the oil grooves (74-4). Press molding of the weir (76) is performed by disposing an inner retainer (84) at a rear surface side while pressing a front surface of the clutch hub (42) by means of a punch (82). The weir (76) is formed of an upstanding front surface (76-1) and rear surface (76-2), both of which are molded surfaces obtained by using a molding tool. The rear surface (76-2) is formed in a precipitous manner as long as the inner retainer (84) can be removed therefrom, so that the retention time of clutch oil in the oil groove (74-4) is extended, thus making it possible to improve the cooling efficiency of the clutch plate.

Inventors:

WATANABE DAICHI (JP)
MIWA MASAMICHI (JP)
SUZUKI RYOSUKE (JP)
NEZU HIDEYUKI (JP)

Application Number:

PCT/JP2018/030075

Publication Date:

February 21, 2019

Filing Date:

August 10, 2018

Export Citation:

Click for automatic bibliography generation Help

Assignee:

UNIPRES CORP (JP)

International Classes:

F16D13/60; B21D22/30

Foreign References:

JPS63210420A	1988-09-01
JP2006077888A	2006-03-23
JPH05231446A	1993-09-07
JP2000516695A	2000-12-12
JP2013249871A	2013-12-12
JPH09310745A	1997-12-02

Other References: