2 weeks, 1 day ago

This is an interesting question. 

Let's use the view of gear engagement to show if one of the gears breaks a tooth, it will affect the transmission. 


 
 
 this is a pair of normal meshing gears. From the above figure, we can see that the gears participating in torque transmission are not only one tooth, but at least larger than one tooth. 

Therefore, we can give a positive answer to the question asked by the subject. Even if a tooth is broken, the gear can still transmit torque temporarily. 

Let's look at another picture. At this time, one tooth of the gear has been broken. 


 
 
 at this time, although a tooth has been broken, it is not so "clean". There are some residual parts at the root of the gear. At this time, the broken tooth is still involved in torque transmission, only local participation. At the same time, the tooth connected with it will bear greater torque. If the torque is within the tolerable range of tooth pressure, the gear will be driven It is still effective, but its service life will be greatly reduced. 

It's like two people carrying water. Suddenly, someone says that he can't lift his back pain. If you still want to drink water, the other person will have to carry back who he is. If he only carries a load of water, it is estimated that the problem is not big. If he keeps picking, the person will not be able to carry it, and then it will be destroyed. 

Until the following happens. 


 
 
 the broken tooth appears root type crack, and the tooth connected with it also breaks to no intersection with the tooth top circle of the meshing gear. At this time, the transmission of the gear is officially invalid and can not transmit torque completely. 

When gears are used in this part, basically two gears that mesh with each other will be discarded. That is to say, if you want to replace them, you will have to replace a pair of gears. 

Therefore, from the perspective of cost, once a gear is found to have cracked teeth, it is necessary to decisively replace the gear, which is the operation of minimizing the cost. Otherwise, if you will use it, it will cost you more. 

At the same time, the unstable torque transmission will also bring the following effects:

1. Continuous impact will affect the service precision and life of gear shaft, such as cutting flat key, destroying keyway and so on

2. Continuous impact will affect the service life and stability of gear bearing force bearing

3. Unstable torque transmission will bring unreliable factors to the operation of the whole equipment and affect the normal operation of the equipment

To sum up, it is the best and most economical maintenance way to solve the problem in the bud. Never have a fluke mind.

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