Tandhjulsprofil
The tooth profile of the sprocket must ensure that the chain enters and exits the mesh smoothly and energy-savingly, minimizes the impact and contact stress of the chain link during meshing, and is easy to process. The tooth profile of the commonly used sprocket is shown in Figure 1. It is composed of three arcs aa, ab, cd and a straight line bc, referred to as three arc-straight tooth profile. The tooth profile is processed with a standard tool. It is not necessary to draw the end tooth profile on the sprocket work drawing. You only need to indicate "the tooth profile is manufactured in accordance with 3RGB1244-85" on the drawing, but the axial profile of the sprocket should be drawn. Refer to the relevant design manual for its dimensions.
Tandhjulsstruktur
Figur 2 viser fire almindeligt anvendte kædehjulsstrukturer. Tandhjul med lille-diameter er generelt lavet af integral type (figur 2a), mellemhjul med-diameter er for det meste lavet af egertype. For at lette håndtering, installation og vægtreduktion er der lavet huller på egerpladen (Figur 2b). Tandhjul med stor-diameter kan laves til en kombineret type (Figur 2d), på dette tidspunkt kan tandkransen og hjulkernen være lavet af forskellige materialer. For eksempel C45, rustfrit stål og andre materialer.
Tandhjulsmateriale
Tandhjulsmaterialet skal sikre, at tandhjulets tænder har tilstrækkelig styrke og slidstyrke, så tandhjulets tandoverflade er generelt varmebehandlet for at få den til at nå en vis hårdhed.
