Main differences between big gear and sprocket

Chain wheel is one of the big gears. It is not the direct cogging of wheels, but the mutual cogging of wheels and chains. Therefore, the processing requirements are much lower. Next, let's briefly share the difference between gears and sprockets.

1、 The big gears are driven by meshing with each other, and the model units are mostly metric, expressed in modules. The power and speed range of transmission is large. Compact structure can realize large transmission ratio, high efficiency and long service life. Chain wheel is driven by chain, and the model unit is generally English. There are single row, double row and multi row. Suitable for low speed, heavy load and high temperature. Compared with big gear, it can be used in the situation where the center of two shafts is far away.

2、 Generally speaking, the chain wheel is driven by a suspension chain, and the model unit is generally English. There are single row, double row and multi row. Suitable for low speed, heavy load and high temperature. Compared with big gear, it can be used in the situation where the center of two shafts is far away. The big gears are driven by meshing with each other, and the model units are mostly metric, expressed in modules. The power and speed range of transmission is large. Compact structure can realize large transmission ratio, high efficiency and long service life.

3、 Their main differences:

1. The big gear is involute, while the sprocket is "three circular arcs and one straight line".

2. Large gears can drive between parallel shafts and any staggered shafts, while sprockets can only drive between parallel shafts.

3. The big gear is driven by the meshing of the teeth of the two big gears, and the transmission between the two sprockets is realized by the chain.

4. The large gear transmission has a compact structure, while the sprocket can realize long-distance transmission.

5. Under normal circumstances, the chain drive has the characteristics of high sprocket teeth and chain engaged at the same time, large chain gear tooth groove arc, and small stress concentration of big gear. Therefore, the chain drive has a large bearing capacity, and the surface wear of gear teeth is relatively light;

6. Because the chain has good elasticity and each hinge part of the chain can store lubricating oil, it has better buffer capacity and vibration absorption capacity compared with the gear teeth in rigid contact;

7. When the transmission capacity is limited by space, the center distance is required to be small, the instantaneous transmission ratio is required to be constant, or the transmission ratio is required to be large, the speed is high, and the noise is required to be small, the transmission performance of the chain is not as good as gear transmission.