The working principle of using timing belt pulleys in a printing press is as follows:

· Timing Belt Transmission System: The printing press timing belt pulley transmission system consists of a timing belt, timing belt pulleys, tensioning device, and driving device. The timing belt is a belt with grooves, and the timing belt pulleys also have corresponding tooth profiles. They engage with each other through the meshing of these tooth profiles.

· Meshing Transmission: When the driving device is started, the timing belt is stretched, causing its tooth profile to mesh with the grooves on the timing belt pulleys. Through this meshing of tooth profiles, the rotational force of the driving device is transmitted to the timing belt pulleys, thereby driving the rotation of the timing belt pulleys.

· Synchronization: The tooth profile of the timing belt pulleys and the grooves on the timing belt are designed with the same module and pitch to ensure synchronization between the timing belt pulleys and the timing belt. This synchronization ensures that the motion speed and direction of different components remain consistent, enabling accurate transmission.

· Transmission Ratio Control: The number of teeth on the timing belt pulleys and the timing belt determines the transmission ratio. Specific transmission ratios can be achieved by selecting timing belt pulleys with different numbers of teeth, allowing the printing press to control the motion ratios between various components to meet its operational requirements.

Using timing belt pulleys in a printing press offers advantages such as precision, efficiency, stability, and low noise, contributing to improved printing precision and reliability. Therefore, the proper selection and use of timing belt pulleys are crucial for the normal operation of the printing press and the enhancement of print quality.