The influence of gear number (transmission ratio) on gear sliding rate

Figure 1 shows the change trend of the sliding rate with the number of teeth (transmission ratio) of the gear when the modulus (M = 6), pressure angle (α = 20 °), modification coefficient (x1 = x2 = 0) and tooth top height coefficient (ha * = 0) of the standard transmission remain unchanged. Among them, figure 3 (a) shows the change rule of the sliding rate with the transmission ratio when other parameters are unchanged, Z2 = 72 and u is 1, 2, 3 and 4; Figure 1 (b) shows the change rule of the sliding rate with the transmission ratio when other parameters are unchanged, Z1 = 18 and u is 1, 2, 3 and 4.

As can be seen from Figure 1 (a), when Z2 remains unchanged (z2 = 72), When Z1 becomes smaller and the transmission ratio increases, the relative sliding rate of the pinion and the big gear increases except for the node, and the sliding rate at the root of the two gears changes the most with the transmission ratio; when Z1 remains unchanged (z1 = 18), except for the node, the relative sliding rate of the gear pair decreases with the increase of Z2, and the sliding rate at the root of the two gears changes the most with the transmission ratio.

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