Solid lubrication oil-free chain

Abstract

An oil-free chain that includes excellent lubricating properties, and satisfactorily maintains the lubricating properties even in high temperature atmosphere and dust particle atmosphere so that a stable lubrication effect can be maintained for a long period of time. The chain is a bush chain having a pair of inner plates into which the opposite ends of a bush are fitted, and a pair of outer plates which mount the opposite ends of a pair of pins. The pins are rotatably fit-inserted into the bushes of adjoining outer link plates. The inner and outer plates are connected in alternation to form the roller chain in which a roller is rotatably mounted on the outer surface of each bush. A sliding member formed of a 100% graphite sheet is provided between the bush and the pin and / or between the bush and the roller.

Description

technical field [0001] The present invention relates to an oil-free chain used in a power transmission mechanism, a conveying mechanism, etc., and particularly relates to an oil-free chain provided with a sliding part between a sleeve and a chain pin and / or a sleeve and a roller. Background technique [0002] In the past, there are the following types of oil-free chains used in power transmission mechanisms and conveying mechanisms, that is, the sleeves embedded in the inner chain plate use oil-containing sintered sleeves, and the oil-free sintered sleeves are used between the sleeves and the chain pins. Supply the chain impregnated with lubricating oil; and, arrange an O-ring between the inner link plate and the outer link plate to seal between the sleeve and the chain pin, and prevent splashing of lubricating oil such as sealed grease and The chain which invaded from the foreign matter from the outside. [0003] In addition, there are also chains that are made of metal or...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned chain using the oil-impregnated sintered bush, there is a problem that the lubricating oil impregnated excessively oozes out due to atmospheric temperature or frictional heat, and the amount of oil retention is small, so it cannot be maintained for a long time. Stable lubricating effect, in addition, in the chain with the O-ring arranged between the inner link plate and the outer link plate, there is the following problem: since the filled lubricating oil is less, it is easy to cause deterioration due to frictional heat, and the same Unable to maintain stable lubrication effect for a long time

Moreover, these chains also have the following problems: since they need to use lubricating oil, they cannot be used in a high-temperature atmosphere of 450°C to 600°C, and if they are used in a dusty atmosphere, the lubricating oil will be absorbed by the dust and shorten the chain even further. Oil-free life

[0006] In addition, in sliding parts containing solid lubricants, as with oil-containing sintered sleeves, there is a problem that the oil-free life is short due to the small amount of solid lubricants, and in particular, resin chains cannot withstand high temperatures. use, so there is also a limit to the use temperature

Images