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Synchronous pulley selection

点击数:859    发布日期:2018-04-28

Synchronous belt pulleys are generally made of steel, aluminum alloy, cast iron and brass. The designed inner holes have circular holes, D-shaped holes, and tapered holes. The surface of the synchronous pulley is generally oxidized, blackened, galvanized, colored zinc plated and high frequency quenched. It is a new type of transmission mode component that integrates the respective advantages of belt drive, chain drive and gear drive.

Synchronous pulleys can be divided into English-made MXL, XL, L, and H, and metric S2M, S3M, S4M, S5M, S8M, and T2.5, T5, and T10 due to different tooth profiles.

According to the difference of the tooth shape, the standard of the selected timing belt wheel is very different. Here we can look at the following two simple selection table.


Timing belt selection criteria

The meshing parameters, such as tooth profile and pitch of the timing pulley, need to determine the number of teeth or diameter of the pulley first, and the structure of the timing pulley.

To determine the number of teeth or diameter of the timing pulley, it is necessary to determine the number of teeth of the small pulley first, and then determine the number of teeth of the large pulley according to the transmission ratio of the pulley. In order to ensure the useful life of the timing belt, the diameter of the small timing pulley needs to be larger than the minimum bending diameter allowed by the model of the pulley, and the minimum number of teeth can be calculated by using it. If the structure and cost permit, we can consider the life of the timing belt first. It is better to use a small number of teeth for the small pulley than the minimum number of teeth allowed. When the number of teeth of the small pulley is determined, the number of teeth of the large pulley can be determined according to the transmission ratio. Finally, according to the structure of the pulley, the center distance between the two pulleys is determined. Finally, the pitch length and the total number of teeth of the timing belt are calculated according to the pitch of the timing belt.

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