Mute dustproof sealed chain

Abstract

The invention discloses a mute dustproof sealed chain which comprises an inner chain board, an outer chain board, a sleeve, pin shafts and rollers. The inner chain board is provided with covering layers which at least cover chain board bodies and are softer than the inner chain board body; preferably, the whole outer surfaces of the chain board bodies are covered with the covering layers, and thethicknesses of the positions, located on the side faces of the chain board bodies, of the covering layers are 0.50-1.50 mm; the thicknesses of the positions, located on the edge faces of the chain board bodies, of the covering layers are 0.10-0.30 mm; and the covering layers are composed of vulcanized rubber layers, plastic layers, reinforced plastic layers or nylon layers. The mute dustproof sealed chain has the beneficial effects that the low-hardness covering layers are formed on the two sides of the inner chain board, the sealing piece effect is achieved, the vibration-absorbing and noise-reducing effects are further achieved, and the structure of the sealed chain is simplified; the service life of the mute dustproof sealed chain is long, noise is small, and the manufacturing and use cost is low; and compared with a sealed chain adopting an O-shaped sealing ring, the assembly efficiency can be improved by 50% or over, the service life can be prolonged by about 15%, the noise can bereduced by 3-5 decibels, and the comprehensive production cost can be reduced by about 10%.

Description

technical field [0001] The invention relates to a sleeve roller chain for power transmission, in particular to a silent dustproof and sealed chain. Background technique [0002] The bushing roller chain is composed of inner chain plate, outer chain plate, bushing, pin shaft and roller in single or multi-row structure. The pin shaft is fixed on the outer chain plate, the sleeve is fixed on the inner chain plate, and the rollers and A coaxial rotatable connection structure is formed between the sleeves and between the sleeve and the pin shaft. The meshing between the chain and the sprocket is mainly rolling friction, so the sleeve roller chain is light in weight, long in life and low in cost. It is widely used. For example, existing motorcycles and bicycles usually use the chain and sprocket of the single-row sleeve roller chain as the power transmission components. The failure forms of chain transmission mainly include chain plate fatigue damage; impact fatigue damage of rol...

AI Technical Summary

Problems solved by technology

However, the existing O-ring sealing structure is usually realized by installing a sealing ring between the pin shaft and the sleeve. When assembling the chain, a separate sealing ring assembly process needs to be set up. The manual assembly efficiency is low, resulting in low production efficiency. , even if automated equipment assembly is used, its efficiency is difficult to improve significantly, and the investment is large, which significantly increases the manufacturing cost

For the labyrinth seal structure chain, the convex and concave matching structure is formed on the inner and outer chain plates, which obviously increases the complexity of the structure, resulting in the disadvantages of cumbersome manufacturing process and high production cost.

In addition, since there is still a serious problem of friction and wear between the sleeve and the roller, its life and noise cannot be significantly improved

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