Chain
AssigneeTsubakimoto Chain Co.
InventorsYuhi Hirata, Kazuyuki Ebinuma
Life of this patent
Estimating the term…
Abstract
A chain with excellent wear resistance, which minimizes chain elongation, reduces vibration and noise, and improves drive efficiency; the chain includes at least a plurality of link plates and a plurality of pins as chain components. The pins and mutually sliding chain components sliding against the pins are formed with a hardened surface layer containing one of Cr carbide, Ti carbide, V carbide, Nb carbide, Cr nitride, Ti nitride, V nitride, and Nb nitride on part or all of respective sliding surfaces. In the case where the chain includes bushings as chain components and the bushings are the mutually sliding chain components, the bushings are formed with the hardened surface layer on part or all of their sliding surfaces.
Claims6
A chain comprising at least a plurality of link plates, a plurality of mutually sliding chain components and a plurality of pins,
- the mutually sliding chain components being the bushings fitted on the pins,
- the pins and the mutually sliding chain components sliding against the pins being formed with a hardened surface layer containing one of Cr carbide, Ti carbide, V carbide, Nb carbide, Cr nitride, Ti nitride, V nitride, and Nb nitride on part or all of respective sliding surfaces, and
- wherein the bushings have a first end face, a second end face, a cylindrical outer surface and an inner circumferential surface, the inner circumferential surface is concave such that a gap is formed between corresponding ones of the pins and the bushings, and the gap increases from the first and second end faces toward a center in a longitudinal direction of the corresponding bushings,
- wherein the hardened surface layer is provided to the concave inner circumferential surface.
Dependencies are inferred from the claim text.