Silent chain

Abstract

Provided is a silent chain that enables adjustment of the stiffness and balance of stiffness between upper and lower sides of guide plates, that prevents long pin failure resulting from deflection ortorsional deformation while securing a sufficient area and strength for the portion contacting a side face of a sprocket, and that suppress vibration and fluctuation. The upper end of a lightening hole (112) of the guide plate is positioned above a pitch line (P), and a lower end of the lightening hole (112) extends out beyond lines that connect intersections T between inner side edges of front and rear pin fitting holes (111) and the pitch line P, and a midpoint C1 of a lower end edge of the guide plate (110) in a front to back direction. Outermost portions of the lightening hole (112) in a longitudinal direction are formed within a range that does not go beyond a pair of vertical lines V vertical to the pitch line passing through the intersections T.

Description

technical field [0001] The present invention relates to a mute system that uses a pair of rocker pins composed of long pins and short pins to alternately connect the guide row formed by the guide plate and the middle plate and the non-guide row formed by the inner chain plate in the length direction of the chain. Chain and its guides. Background technique [0002] In the past, such as Figure 3 to Figure 5 As shown, as the silent chain 500, a guide row 501 composed of a pair of left and right guide plates 510 and an intermediate plate 520 is known in the length direction of the chain by using a pair of rocker pins 504 composed of a long pin 540 and a short pin 550. The silent chain 500 is interconnected by non-guiding rows 502 composed of a plurality of inner chain plates 530 . [0003] The long pin 540 is positioned in the pin hole of the middle plate 520 while being fitted and fixed in the pin hole 511 of the guide plate 510 , and the guide plate 510 and the middle plate ...

AI Technical Summary

Problems solved by technology

[0007] When a tensile load in the chain pitch direction acts on such a silent chain 500 , there may be cases where the tension load is affected by the intermediate plate 520 having teeth and the guide plate 510 having no teeth. The rigidity is different, and the middle plate 520 with low rigidity is more elongated in the chain pitch direction than the guide plate 510 with high rigidity, which causes the long pin 540 to bend and break.

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