Structural design of sprocket wheel

Tooth shape of sprocket wheel

The sprocket wheel tooth shape must ensure that the chain can enter and exit the engagement smoothly and smoothly, minimize the impact and contact stress of the link during the engagement, and be easy to process. Commonly used sprocket wheel end profile. It is composed of three arc sections AA, AB, CD and a straight line BC, which is called three arc straight tooth profile for short. The tooth profile is processed with standard tools. It is unnecessary to draw the end face tooth profile on the working drawing of sprocket wheel. It is only necessary to mark "the tooth profile is manufactured according to the provisions of 3rgb1244-85" on the drawing, but the axial tooth profile of sprocket wheel shall be drawn. Refer to the relevant design manual for its dimensions.

Sprocket wheel structure

Commonly used sprocket wheel structure. The small-diameter sprocket wheel is generally made into an integral type, and the medium-diameter sprocket wheel is mostly made into a spoke plate. In order to facilitate handling, loading and weight reduction, holes are made in the spoke plate, and the large-diameter sprocket wheel can be made into a combined type. At this time, the ring gear and the wheel core can be made of different materials. For example, C45, stainless steel and other materials.

Sprocket wheel material

The material of sprocket wheel shall ensure that the gear teeth have sufficient strength and wear resistance, so the tooth surface of sprocket wheel is generally heat treated to make it reach a certain hardness.