CHAIN BELT-TYPE VARIABLE TRANSMISSION

Title:

CHAIN BELT-TYPE VARIABLE TRANSMISSION

Document Type and Number:

WIPO Patent Application WO/2012/091469

Kind Code:

A2

Abstract:

The present invention relates to a chain belt-type variable transmission for controlling a transmission gear ratio, in which a chain belt is wound to a driving pulley device and to a driven pulley device having variable diameters, and more particularly, in which the tooth profile of front and rear latch gear portions are formed in opposite directions while the latch gear portions are divided into front and rear portions, and are formed on a plurality of driving side belt supports and driven side belt supports, each of which is radially and expandably installed on the driving pulley device and the driven pulley device so as to have a predetermined distance therebetween, wherein each of the latch gear portions that are formed on the driving belt support and each of the tooth profiles of the latch gear portions that are formed on the driven side belt support face opposite sides, so that each of the latch gear portions that is formed on the driving side belt support and on the driven side belt support is installed so as to crisscross and not be on one line, and wherein two strips of latch-type chain belts that correspond to the front and rear latch gear portions are wound on the driving pulley device and the driven pulley device for transferring driving force from the driving and the driven sides in both directions, and the plurality of driving side belt supports and the driven side belt supports, which are installed on the driving pulley device and the driven pulley device are installed obliquely like a tooth profile of a helical gear, for reducing noise when the latch-type chain belt and the belt supports contact and separate from each other while increasing the contact area between the latch gear portions of the belt supports and the latch portion of the latch-type chain belt to provide more accurate transferring of driving force.

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