There are two adjustment methods for motorcycle sprocket transmission pairs
(1) Misalignment gasket adjustment method. The principle of the helical gear shim adjustment method is the same as that of the misalignment adjustment method. The tooth profiles of helical teeth 1 and 2 are assembled together for processing. During assembly, a shim 3 with a known thickness of t is installed between the two thin plate gears, so that its spiral is staggered, causing the two thin plate gears to be in close contact with the left and right tooth surfaces of the wide gear 4, eliminating the gap. The thickness of gasket 3 is related to the tooth flank diameter △ as follows:
1=AAcot β (where β is the helix angle)
The thickness of the gasket is generally determined by testing methods and often requires several rounds of grinding to adjust properly.
. This type of gear structure has a relatively low load-bearing capacity and cannot automatically compensate for cancellation (2) Axial compression spring adjustment method. As shown in Figure 3-19, the axial compression spring of the helical gear has a staggered tooth clearance structure. The principle of canceling this structure is similar to the axial shim adjustment method, but the difference is that the spring pressure on the right side of gear 2 is used to make the left and right gear surfaces of the two thin plate gears tightly adhere to the left and right tooth surfaces of the wide gear, respectively, in order to cancel the side clearance. As shown in Figure 3-19 (a), a compression spring is used, and as shown in Figure 3-19 (b), a disc spring is used The pressure of spring 3 can be adjusted using nut 5, and the magnitude of the pressure should be adjusted appropriately. If the pressure is too high, it will accelerate gear wear, and if the pressure is too low, it will not achieve the clearance effect. This type of gear clearance structure can automatically cancel and maintain seamless meshing, but it is only suitable for situations with small loads, and the axial dimension of this structure is relatively large