What are the design features of the high speed transmission chain sprocket?

The design of the high-speed transmission roller chain sprocket is asymmetric with the tooth profile left and right tooth profiles, that is, the left tooth profile and the right tooth profile are asymmetric with respect to the center of the tooth root arc and the center line of the sprocket. The tooth profile of the single-tooth one-side working face, that is, the left tooth profile is composed of three sections of the root section, the lead-in section and the working section, wherein the root section is an arc, the lead-in section is an arc, and the working section is an involute, a circle. One of the arcs and quadratic curves is a composite curve composed of a plurality of arcs and quadratic curves. The working surface profile can also be composed of two sections of curves, namely the root section and the working section. The curve of the non-working surface profile, ie the right tooth profile, is an arc.

The sprocket with asymmetrical left and right tooth profile can make the roller gradually mesh into the sprocket. Similar to the traditional involute gear meshing, conjugate engagement can be achieved, theoretically achieving zero engagement impact. The meshing mechanism has no "polygon effect" and no lateral movement, that is, the tight edge of the chain keeps the upper and lower positions unchanged during transmission, which can greatly reduce the lateral vibration and the driven sprocket rotation vibration caused by the "multiple deformation effect". The periodic change of the position of the center line of the chain is reduced, and the center line of the chain drive has a fixed position, and the conjugate engagement is basically realized. The structural design of the tooth profile and the design of the tooth profile of the sprocket face ensure that the roller chain and the sprocket have a small or negative meshing pressure angle during the meshing process, improving the stress, improving the load carrying capacity and reducing the biting. Impact, greatly reducing vibration and noise. Therefore, low vibration and low noise can be achieved, which is suitable for high speed transmission. The sprocket tooth profile asymmetry correction method is related to the toothed chain chain parameters and the sprocket parameters.