Taking the spiral bevel gear pair with 39 large teeth and 13 small teeth as an example, the shape of the whole meshing area of the tooth surface under no-load condition is as follows:
When the torque is 400nm, the shape of the whole meshing area of the tooth surface is shown in Figure 1; when the torque is 600nm, the shape of the whole meshing area of the tooth surface is shown in Figure 2; when the torque is 800nm, the shape of the whole meshing area of the tooth surface is shown in Figure 3.
Taking the spiral bevel gear pair with 47 large teeth and 33 small teeth as an example, the shape of the whole meshing area of the tooth surface under no-load condition:
When the torque is 400nm, the shape of the whole meshing area of the tooth surface is shown in Figure 4; when the torque is 600nm, the shape of the whole meshing area of the tooth surface is shown in Figure 5; when the torque is 800nm, the shape of the whole meshing area of the tooth surface is shown in Figure 6.
According to the shape of the contact area at different times, when the meshing point transitions from the root of the big wheel to the top of the big wheel, the center of the contact area gradually shifts from the small end to the large end. At the same time, it can be seen from the above two examples that when the torque transmitted by the spiral bevel gear pair changes from small to large, the center of the contact area also shifts to the large end for the same meshing position.