Power transmission chain, and power transmission system

Abstract

At the peripheral edge of a through hole, in which one pin or strip in a link plate is fixed, a compressive residual stress is applied selectively to vicinities of the outer corners of two upper and lower sides confronting in the chain radial direction of said one pin or strip.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the state, in which a power transmission chain is looped between an input pulley and an output pulley.

FIG. 2 is a sectional view showing an essential construction, in which the power transmission chain is looped on the input pulley.

FIG. 3 is a perspective view schematically showing an essential construction of the chain.

FIG. 4 is a front elevation of a three-cylinder type preloading apparatus.

FIG. 5 is a front elevation of an essential portion of the three-cylinder type preloading apparatus.

FIG. 6 is a sectional view of the vicinity of an upper lower or a lower roller.

FIG. 7 shows FEM results of a link plate, to which a preload of 12 kN is applied.

FIG. 8 shows FEM results of a link plate, to which a preload of 16 kN is applied.

FIG. 9 shows FEM results of a link plate, to which a preload of 20 kN is applied.

FIG. 10 shows FEM results of a link plate, to which a preload of 24 kN is applied.

Claims

1. A power transmission chain comprising: a plurality of overlapped link plates, each having a pair of through holes; anda plurality of first and second pin members connecting said link plates to each other, of which one is fixed and another other is inserted in a rolling manner into said through holes, said first and second pin members being relatively rotatable in rolling contact with each other,wherein a compressive residual stress is applied selectively to vicinities of outer corners of two upper and lower sides of said one pin member, which confront each other in a chain radial direction.

2. The power transmission chain according to claim 1, wherein a pair of the first and second pin members are inserted into one through hole such that the first pin is press-fitted in said through hole and the second pin is rotatably inserted with rolling contact with a side face of said first pin.

3. A power transmission system comprising: a first pulley having a conical sheave face, a second pulley having a conical sheave face, and a power transmission chain looped between said first and second pulleys and contacting with the sheave faces of said first and second pulleys thereby to transmit a power between the two pulleys by a frictional force,wherein said power transmission chain is one according to claim 1.