The synchronous belt of a printing machine is mainly composed of equidistant toothed ring belts on the inner surface and corresponding wheels. In today's market economy, it is also widely used in transmission products< br> I. Features of synchronous belt:
1. Accurate transmission, no sliding during operation, constant transmission ratio< br> 2. Stable transmission, buffering, vibration reduction, low noise
3. High transmission efficiency, up to 0.98, obvious energy-saving effect
4. Easy maintenance, no lubrication, low maintenance cost
5. The speed ratio range is large, generally up to 10, and the linear speed can reach 50 m/s. It has a large power transmission range, which can reach several watts to hundreds of kilowatts< br> 6. It can be used for long-distance transmission. The center distance can reach 10m. Compared with V-belt transmission, the preload is smaller and the load on the bearing is smaller< br> II. Classification:
Synchronizing gear has trapezoidal gear and arc gear, and arc gear has three series:
Arc tooth: flat top arc tooth (S series is also called STPD belt) and concave top parabolic tooth (R series)< br> Folding trapezoidal tooth synchronous belt The trapezoidal tooth synchronous belt is divided into single side tooth and double side tooth, referred to as single side belt and double side belt. According to the arrangement of teeth, the double-sided belt is divided into symmetrical tooth type (code DA) and staggered tooth type (code DB). There are two size systems for trapezoidal gear synchronization: pitch system and module system. The pitch system is adopted in China, and the corresponding synchronous belt transmission standards GB/T113661~11362-1989 and GB/T11616-1989 are formulated according to ISO5296< br> Folding arc tooth synchronous belt:
The structure of the spiral tooth synchronous belt is basically the same as that of the trapezoidal tooth synchronous belt, with the same spacing and tooth height The tooth root thickness and the tooth root fillet radius are greater than those of trapezoidal teeth. After being loaded, the stress distribution is good, which smoothes the stress concentration of the tooth root and improves the bearing capacity of the tooth. Therefore, the spiral tooth synchronous belt has higher transmission power than the trapezoidal tooth synchronous belt, and can prevent the interference of the teeth in the meshing process< br> The arc tooth synchronous belt has good wear resistance, low noise when working, and no lubrication is required. It can be used in the harsh environment with dust. It has been widely used in food, automobile, textile, pharmacy, printing, paper making and other industries.