1. Chain Basics
Attachment
Pin Pin Link Plate
Press Fit
Slip Fit
Pin Link
Press Fit
Bushing
Roller Link
Press Fit
Pin Link
Slip Fit
T-Pin
Roller Link
Pin Link Plate (Flat Hole)
Roller Link Plate
Press Fit
Figure 1.6 Basic Structure of Large Pitch Conveyor Chain
Pin The pin is subject to shearing and bending forces transmitted by the plate. At the same time, it forms a load-bearing part, together with the bushing, when the chain flexes during sprocket engagement. Therefore, the pin needs high tensile and shear strength, resistance to bending, and also must have sufficient endurance against shock and wear. Bushing The bushing is subject to shearing and bending stresses transmitted by the plate and roller, and also gets shock loads when the chain engages the sprocket. In addition, when the chain articulates, the inner surface forms a load-bear- ing part together with the pin. The outer surface also forms a load-bearing part with the roller’s inner surface when the roller rotates on the rail or engages the sprocket. Therefore, it must have great tensile strength against shearing and be resistant to dynamic shock and wear. Roller The roller is subject to impact load as it strikes the sprocket teeth during the chain engagement with the sprocket. After engagement, the roller changes its point of contact and balance. It is held between the sprocket teeth and bush- ing, and moves on the tooth face while receiving a compression load.
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