Power transmission chain, power transmission device, and method of producing the chain
AssigneeJtekt Corporation
InventorsShinji Yasuhara, Shigeo Kamamoto, Nobuki Fukui
Life of this patent
Estimating the term…
Abstract
A power transmission chain 1 includes a plurality of links 11 having front and back insertion parts 12, 13 into which pins are inserted, and a plurality of pins 14 and a plurality of interpieces 15 for connecting the links 11 aligned in a chain width direction so as to be bendable in a longitudinal direction such that a front insertion part 12 of one link 11 and a back insertion part 13 of another link 11 correspond to each other. Each pin 14 and each interpiece 15 are fitted and fixed to the peripheral faces of the insertion parts 12, 13 by fitting, and a difference in dimension before the fitting is 0.005 mm to 0.1 mm.
Claims16
A power transmission chain including;
- a plurality of links having front and back insertion parts into which pins are inserted;
- and a plurality of first pins and a plurality of second pins for connecting the links aligned in a chain width direction so as to be bendable in a longitudinal direction such that a front insertion part of one link and a back insertion part of another link correspond to each other, in which a first pin fixed to a front insertion part of one link and movably fitted in a back insertion part of another link and a second pin movably fitted in the front insertion part of the one link and fixed to the back insertion part of the other link move relatively in a rolling contacting manner so as to enable bending in a longitudinal direction between the links, wherein
- fixing of pins to the front and back insertion parts are performed by fitting by mechanical press-in, shrink-fitting or cool-fitting, and at least one of following conditions is satisfied;
- a condition that a difference in dimension is 0.005 mm to 0.1 mm;
- a condition that maximum tensile stress in a periphery of the insertion part after fitting is not more than 1000 MPa;
- and stress in the periphery of the insertion part after fitting is 3 to 80% of stress in an elastic modification limit.
A method of manufacturing a power transmission chain including;
- a plurality of links having front and back insertion parts into which pins are inserted;
- and a plurality of pins for connecting the links aligned in a chain width direction so as to be bendable in a longitudinal direction such that a front insertion part of one link and a back insertion part of another link correspond to each other, in which a pin is fixed to a front insertion part of one link and movably fitted in a back insertion part of another link so as to enable bending in a longitudinal direction between the links, the method is characterized in fixing a respective pin to a peripheral face of the insertion part of a respective link by shrink-fitting or cool-fitting.
Dependencies are inferred from the claim text.