What are the common faults of electric drills? Electric drill repair Daquan

In life, we often encounter accidents like this, for example, our tools are broken. If you buy a new one, it is a bit extravagant; if you let the professional repair it, it will be fine for people to make a fool of two, which makes you feel very uneconomical. If this is the case, then it is necessary to learn to repair common tools. Here, Xiaobian provides some methods for repairing hand drills.

A hand drill is a tool that we often need in our lives. It is a relatively common power tool. If you are using a hand drill, it suddenly breaks down. What should you do?

The most prone to failure of a hand drill is its motor and armature windings. Here are some common faults and how to repair them.

First, the maintenance of motor failure

The fault of the motor often manifests as: after the power is turned on, the motor does not respond, resulting in the electric drill not working properly; or the slower and slower the motor, the impact force of the hand drill is reduced, and the normal operation cannot be performed; in addition, the fault of the motor is also represented by the motor. The noise is too large when working, and the electric drill can't shake. These will cause the hand drill to malfunction and affect its normal operation.

In the first type of fault, the motor can not work normally. The drill body should be disassembled to check whether the fuse is blown or the power cord is blown. If there is such a problem, the fuse or power cord should be replaced immediately; or it may be due to the armature winding. Or the damage of the stator winding, this has to replace or repair the winding; it may be due to the bearing rust, the bearing should be lubricated or rust-removed.

In the second type of fault, the motor speed is slowed down due to severe wear of the brush and should be replaced immediately.

In the third type of fault, the motor noise is too large, which is caused by the wear of the brush or the bearing, which requires replacement of the brush and the bearing.

Second, the maintenance of the armature winding

The armature winding is a very important component in the hand drill, and its damage can cause the hand drill to fail to work properly. Common faults are short circuits and short circuits of the armature windings.

The armature winding is short-circuited because the insulation surface of adjacent coils in the coil of the armature winding is damaged, causing the coil to be unenergized, thereby affecting normal operation. Therefore, when it is found that the coil is damaged or the surface insulation material of the coil is damaged, we should replace the coil in time to keep the armature winding working normally.

The short circuit problem of the armature winding is more complicated than the short circuit problem. Because of the short circuit condition, we can judge whether the insulation material of the coil surface is damaged or not, and the open circuit problem cannot. We can use the universal meter to detect. If the resistance between the two commutators is greater than the normal parameter, then there must be an open circuit between the coils between the two commutators, which should be immediately between The coil is replaced.

These are the failure analysis of the maintenance hand drill and its simple maintenance method. I hope that readers and friends can use it.

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Label: What are the common faults of electric drills? Electric drill repair Daquan

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