Impact mechanism repair
The design of the percussion mechanisms differs from the type of hammer drill. Therefore, the elimination of the cause of the malfunction has its own small differences.
In the case of a barrel unit, the impact block functions on the basis of a crank mechanism. The main malfunction of such a device is considered to be wear of bearings and rotating parts. Their repair consists in installing new parts, while it is necessary to take into account the strict compliance of the element brand for this model.
For a unit with a horizontal engine, the piston of the percussion mechanism is driven by a swinging (drunk) bearing. Most often, damage to this unit occurs due to wear of such a bearing.
When replacing it, special attention should be paid to cleaning the gearbox from possible small fragments of a damaged element and subsequent lubrication of the installed parts
And also the reason that the unit does not hit may be a broken striker, which must also be replaced with a new element.
Punch device and its mechanism
Unlike a drill, as well as an impact drill, the hammer drill has an enhanced impact function, which puts it an order of magnitude higher in situations where it is necessary to apply a significant mechanical effect on the materials being processed.
This is achieved by the design features of the perforator device. The device is equipped with an independent mechanism for generating a powerful pneumatic push of the working tool, and this ability of it frees the master from the use of physical efforts when drilling and chiselling concrete and stone.
Sectional punch hammer mechanism
The transformation of the rotational motion of the electric motor into the translational vibration of the percussion mechanism is performed by creating compression between the pistons. This movement is transmitted to the drummer. The striker, made of high strength steel, in turn sends the energy of compressed air directly to the working tool - a drill, chisel or blade. Such a device of the unit allows you to increase the impact power to a huge destructive force - 20 kJ.
Rotary hammer with a vertical engine ("barrel")
Depending on the location of the engine, there are drill-shaped and barrel types of perforators.
- The first type of device is similar to a drill, in which the motor is located in the same axis as the drill.
- For rock drills of the second type, the motor is installed perpendicular to the drilling axis.
Replacement of main parts
When using the device, it is necessary to monitor its serviceability. When the first signs of a malfunction appear, urgent repairs are required. In order to avoid major repairs, you need to monitor the condition and, if necessary, change the following elements: bearings, power button, graphite brushes and a cartridge.
The bearing changes in the event that grease has flowed out of it, it scrolls heavily or squeaks. To complete this operation, you will need a puller and a wooden hammer.
The power button is very easy to change. This requires disassembling the case. In this case, it is necessary to trace the disconnection of the device from the network.
In order for the equipment to serve for many years, it is required to perform maintenance, keep it clean, clean and lubricate moving parts in time, and replace brushes and bearings. In this case, repairs may not be necessary at all, the equipment will function properly for many years.
Features in the repair of a barrel rock drill
All the described procedures for assembling and disassembling the mechanisms of perforators are also valid for the barrel variety. However, there are several nuances that must be taken into account when repairing it. The vertical arrangement of the engine at right angles to the percussion mechanism slightly changes the order of disassembly. So, to gain access to the gearbox and piston, it is necessary to remove the plastic cover located at the top of the tool casing. This makes it easier to repair the mechanical part of the device if the shock function suddenly disappears.
Access to the electrical part of such a perforator is carried out after removing the lower casing. And the replacement of brushes is simplified, since there are holes on the sides of the glass through which they can be easily removed.