Reading volume:16 发表时间:2019/3/22 14:26:16
Everyone knows that sprockets and gears are very important in our lives, so what is the difference between the two?With this question, hurry up and learn about it with the editor.
1. The gears are driven by meshing with each other. The model unit is mostly metric and expressed by modulus.The power and speed range of the transmission is relatively large.The compact structure can achieve a large transmission ratio, high efficiency and long service life.
2. The sprocket is driven by a chain, and the model unit is mostly British.There are single row, double row and multiple rows.Suitable for low speed, heavy load and high temperature conditions.Compared with gears, it can be used where the cores of the two shafts are far away.
The main difference between a gear and a sprocket is that the gear has an involute tooth profile, while the sprocket has a "three-arc straight line" tooth profile.The gear is driven by the meshing of the teeth of the two gears, and the transmission between the two sprockets is realized by the chain.Gears can realize transmission between parallel shafts and arbitrary interleaved shafts, while sprocket can only realize transmission between parallel shafts.The torque transmitted by the gear is greater than that of the sprocket.Gear machining accuracy and installation cost are higher than sprocket.The gear transmission structure is compact, and the sprocket can realize long-distance transmission.
The chain drive is suitable for transmission with a large center-to-core distance, and has the characteristics of light weight and low cost; the machining accuracy and installation accuracy of the chain and sprocket in the chain drive, and the accuracy of the center-to-core distance are lower than the gear requirements. It is easier for some chain drives to change their parameters (transmission ratio, center core distance, etc.), and the installation and maintenance are simple and convenient; under normal circumstances, the chain drive has higher sprocket teeth and the chain to engage at the same time and the sprocket teeth The groove arc is large and the gear stress concentration is small. Therefore, the chain drive has a large load-bearing capacity, and the gear tooth surface is relatively light; because the chain has good elasticity, and each hinge part of the chain can store lubrication Oil, therefore, compared with gear teeth with rigid contact, has better cushioning capacity and vibration absorption capacity; when the transmission capacity is limited by space, the center core distance is required to be small, the instantaneous transmission ratio is required to be constant, or the transmission ratio is too large and the speed is required. In the case of very high and low noise requirements, the performance of chain transmission is not as good as gear transmission.
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