What are the common faults of electric hammers? Electric hammer repair method Daquan

Electric hammers are a type of power tool used to drill holes in concrete, slabs, brick walls and stone. Professionally punch holes in the wall, concrete, stone, and multi-function electric hammer, adjust to the appropriate position with the appropriate drill bit can replace the ordinary electric drill, electric pick. So what are the faults that the hammer will encounter in daily use? What should I do if something goes wrong? Xiao Bian summarizes the common faults and maintenance methods of the following two power tools:

First, electric hammer electrical failure

Electric hammer electrical faults, mainly open circuit, short circuit, grounding, rotor reversing ring spark.

Most of the faults of the open circuit are the broken lines. The leather line is most common at the root of the handle. This kind of broken line has a characteristic that the power cord of the hammer is connected to the resistance of the multimeter, and the switch is pressed. At the root of the movable leather cord, the reading of the multimeter will change. In addition, the root of the plug is also easy to break, and the switch is also broken. The switch uses a multimeter to check the poor contact of the carbon brush and can cause an open circuit. There are two ways to brush the carbon brush and not touch it:

The end face of the first observation carbon brush is in good contact with smooth contact, and the contact of the pockmark is poor. Another method of inspection is to connect the test leads of the multimeter to the beginning of the motor, and press the two screwdrivers simultaneously onto the brush socket and the rotor. At this time, if the conduction is turned on, the motor is not faulty, and the carbon brush does not pass, indicating the carbon brush contact. bad. The stator earrings are blown and can also cause the motor to open.

The rotor is sometimes also broken, which is characterized by connecting the power cord to the multimeter and slowly turning the rotor. The readings will vary greatly. Grounding is generally caused by the stator and rotor rubbing iron, and the rubbing iron needs to be changed. The rotor, the other one is the drying caused by water or moisture. The rotor spark is generally caused by the rotor fault. The rotor needs to be replaced. After the rotor is replaced, it is necessary to observe whether there is rubbing iron. When the iron is severely turned on, there is a squeaking sound. If the iron is light, the working time will be long. The taste current also rises, causing the cause of rubbing iron, the screws of the fixed stator are loose, the bearing seat is too loose, the stator shell is deformed, and the bearing is damaged.

Second, electric hammer mechanical failure

The main fault of the electric hammer mechanical part is that it is not impact and impact. The main reason for not impacting is the aging of the rubber ring on the piston and the hammer. The large cylinder is erected and the mouth is facing downward. If the hammer can fall freely, then The rubber ring must be aging. The rubber ring aging can hear the sound of the piston and the hammer colliding with each other during work. After the disassembly, the end face of the piston and the hammer can be found to be bright, and the short impact seed can also cause no impact. The impact of the seed is compared.) Oil-free can also cause impact weakness. If the above conditions are normal and there is no impact, then it is necessary to observe the large cylinder to see if there is any crack, and if there is a crack, it needs to be replaced.

If the motor turns after the power is turned on, the sound that the hammer head can not hear the compression may be broken or eccentric. If the motor turns after starting, the hammer does not turn and the sound without compression may be damaged by the first stage or the shaft of the rotor. Then there is the bad performance of the umbrella teeth to turn into weakness or not to turn at all. There is another phenomenon. Please pay attention to the fact that the key is broken. When we check the cooperation of the gear and the shaft, because the strong friction shaft and the gear rubber are together, it is not easy to find the break of the key, but it cannot work normally after the load is applied.

Before replacing the new parts, be sure to clean the dirt and oil in the fault point so that we can find other faults. The needle roller bearing in the middle cover must be used well. If it is used as a defective product, it can be damaged by the first stage wheel and the rotor shaft.

Finally, Xiaobian reminds you that if you are a newly opened store and cannot accurately judge the faults of various tools, you may wish to first remove some new tools, just remember the cooperation and data of various tools under normal conditions, to repair I can feel the abnormality of the fault point.

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Label: What are the common faults of electric hammer? Electric hammer repair method Daquan

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