Synchronous belt drive design:
a. The number of meshing teeth The number of meshing teeth between the synchronous belt and the small pulley should be ≥6. If the mechanism allows, the center distance can be increased, or the diameter of the pulley can be kept at a small pitch, but it should be where permitted.
b. Timing belt width, pitch and pitch length are complicated to calculate due to the determination of timing belt width, so in actual design, the circular force is often calculated, and then refer to the allowable circular force in the relevant mechanical design manual Find out the corresponding bandwidth and pitch, generally take 5.08. After determining the pitch and bandwidth, calculate the length of the belt pitch line according to the initial center distance, and then select it according to the standard. If it does not meet the requirements, the center distance can be adjusted.
c. The tooth shape of the synchronous belt of the head drive mechanism of the computerized flat knitting machine is generally arc-shaped, and some are trapezoidal, but no matter what kind of tooth shape, a circle on the pulley must be tangent to the pitch line of the belt , and implement pure rolling, the second is that the distance between the corresponding points of the two adjacent teeth on the pulley on this arc is equal to the pitch of the synchronous belt. In order to ensure the good performance when the belt meshes with the pulley, the tooth profile angle of the pulley should be correctly selected during the design. From ° to 25°, the amount of interference between the gear teeth and the belt teeth is small, and the tooth profile angle deviation is about ±1°.
