Method of manufacturing power transmission chain and pretension load device used in manufacture of power transmission chain
AssigneeJtekt Corporation
InventorsSeiji Tada, Kozue Matsumoto, Kazuo Rokkaku
Life of this patent
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Abstract
In the state where plural sheets of link plates which are single parts are laminated, tension for widening a distance between through-holes is loaded by a pair of pins which are inserted through the through-holes of the link plates so as to load pretension serving as a predetermined compressive residual stress on the link plates. Subsequently, the pair of pins are extracted from the link plates. Consequently, connection members are inserted through the corresponding through-holes of the plurality of link plates so as to assemble a chain with an endless shape.
Claims13
A method of manufacturing a power transmission chain including a plurality of link plates which are arranged in a chain movement direction and a plurality of connection members which bendably connect the plurality of link plates to each other, the method comprising:
- loading a force for widening a distance between a pair of through-holes by a pair of pins, the pair of pins being inserted through the pair of through-holes in a state where one sheet of the link plate comprising the pair of through-holes is disposed or plural sheets of the link plates comprising the pair of through-holes are laminated so as to load pretension to generate a predetermined compressive residual stress on the one sheet of the link plate or plural sheets of the link plates;
- extracting the pair of pins from the link plate or plural sheets of the link plates;
- and
- inserting the connection members through corresponding through-holes of the plurality of link plates on which the pretension is loaded so as to assemble the power transmission chain.
A pretension load device comprising:
- a pair of pins which are inserted through a pair of through-holes of a link plate;
- a pin holding structure into which an end of at least a pin of the pair of pins is disposed;
- and
- a distance enlargement mechanism which widens a distance between the pair of through-holes by imparting a force on the pair of pins.
A pretension load device comprising:
- a pair of pins which are inserted through a pair of through-holes of a link plate;
- a distance enlargement mechanism which widens a distance between the pair of through-holes using the pair of pins;
- and
- a base comprising an insertion through-hole through which one of the pair of pins is inserted,
- wherein the distance enlargement mechanism includes a tension mechanism which tensions the pair of pins in a direction moving away from each other, and
- wherein the tension mechanism includes a drive mechanism which drives the base in a direction where one pin moves away from another pin of the pair of pins.
A pretension load device comprising:
- a pair of pins which are inserted through a pair of through-holes of a link plate;
- a distance enlargement mechanism which widens a distance between the pair of through-holes using the pair of pins;
- and
- a base comprising an insertion through-hole through which one of the pair of pins is inserted,
- wherein the distance enlargement mechanism includes a tension mechanism which tensions the pair of pins in a direction moving away from each other, and
- wherein the tension mechanism includes a cam mechanism which converts a force for inserting one pin to the insertion through-hole of the base into a force for moving the one pin away from another pin of the pair of pins.
Dependencies are inferred from the claim text.