Features designs household Hammers Bosch 2-20, 2-24, 2-26

The most widespread among Russian professional builders got Bosch rotary hammers, and among lovers of household model Bosch 2-20, 2–24, 2–26.

Hammers not only work well, but also easy to repair. They can easily find any, faulty part.

In the constructions described perforating laid one and the same principle, transmit torque from the rotor to the shaft impactor unit barrel with simultaneous translational momentum of the working tool.

Structurally drills made according to the same scheme, but the individual parts or components have their own characteristics.

If you know the specific differences between the models described Hammers Bosch, the disassembly and repair their own hands will not be difficult.

Along with the originals in the Russian market there are a large number of fake tools, including Bosch rotary hammers.

The following describes the design features of models and methods for disassembly and repair their own hands.

The operating principle of perforating the same, but the design features differ.

Key details, used in these models of hammers Bosch, interchangeable. This applies to the mechanical and electrical assembly.

But there are sites and did, different used parts.

To perform repairs perforator Bosch 2-20, 2–24, 2–26, These differences need to know. Knowledge of the design of each punch simplifies the repair process, Spent failures and their elimination.

Bosch rotary hammers design so simple, that allow to execute simple repairs, practically with their hands, and replace any item without a service call. We must have the skills collector, have a basic knowledge of electrical engineering and to understand the principle of the punch.

The main differences in the structures perforators Bosch

Repairing hammer Bosch, you can not do without electricity and disassembly tool of the model scheme, you are going to repair.

Electrical circuit perforators Bosch 2-20, 2–24, 2-26 are virtually identical. Although some differences are inessential.

But mechanical blocks Parts Kits, differing with each other constructively. The main differences are collected in two nodes: the intermediate shaft and the shaft of the hammer barrel unit.

The greatest difference in the constructions presented countershaft, assembly "drunken Bearing", to switch modes. Non-critical features are present in structures impactor unit barrel, drummer, hammer.

Let's start with the gun Bosch 2-20.

The circuit design and the perforator Bosch 2-20

Repair perforator Bosch 2-20 is not able perpetrated without the knowledge of design tools.

The operating principle of the perforator Bosch 2-20 based on the transmission torque from the shaft to the rotor pos.3 impactor unit poz.22 shaft via the intermediate shaft poz.824, simultaneously transmitting longitudinal momentum to the working tool.

Rotor pos.3 transmits torque helical gear on the intermediate shaft poz.824.

Spur gear fixed to the intermediate shaft and transmits the torque to the shaft. The shaft bearing is fixed drunk, receiving the torque through the clutch. Due to its design drunk bearing transmits translational movement to the hammer barrel cylinder.

The design of the intermediate shaft perforator Bosch 2-20

Intermediate shaft perforator Bosch 2-20 consists of a rolling bearing assembly (drunk bearing), clutch, large helical gear, a small spur gear.

Most often, damage to occur in the wear of the splines of the clutch, which leads to the disappearance of the rotational punch holder in the presence of shock pulse.

Corrected by replacing the clutch or restoring teeth coupling parts.

Features Bosch 2-24 punch design

Repair perforator Bosch 2-24 is best to start with an introduction to the scheme and the design features of the instrument to establish. The operating principle of the perforator Bosch 2-24 is similar to that action punch Bosch 2-20.

The torque transmitted to the shaft of the tool attachment, simultaneously with the transfer of shock pulse. At the gun, there are three modes of operation: with the impact drilling, without impact drilling, hit.

Helical poz.803 rotor gear transmits torque to the intermediate shaft gearwheel helical poz.826.

The design of the intermediate shaft perforator Bosch 2-24

Intermediate shaft rotary hammer Bosch 2-24 It consists of a rolling bearing assembly poz.830, Clutch Clutch poz.823, Details poz.44 switch. Most often it comes down clutch. It worn teeth. Repair coupling is to correct tooth profile engaging in the sleeve and on the intermediate shaft.

The design of the hammer shaft barrel

impactor unit barrel shaft for transmitting the rotational momentum with simultaneous movement of the impactor.

Rotation is transmitted from the spur gear of the intermediate shaft to the large spur gear shaft poz.22 poz.821 barrel.

The reciprocating movement is transmitted through bearing drunk poz.830, percussion piston at 26, peen poz.27, percussion bolt pos.28 on the fixed chuck drill poz.756.

The design represents the shaft, Hollow on the one hand. The shaft with the two sides set details.

From the cartridge mounting shaft spur gear poz.22 mounted and fixed on the shaft by means of roller poz.88, is pressed against the shaft shoulder spring poz.80. Itself fixed spring retaining ring poz.85.

The cavity block stem shaft impactor inserted: pos.28 assembled percussion bolt and the percussion piston. The percussion piston is inserted at 26 striker poz.27 to put to him a new rubber ring poz.73. All rubber products are lubricated recommended lubricant.

Faults shaft impactor barrel

Due to the weakening of the spring force, loss of the fixing roller gear can be rotated on the shaft. This manifests itself in failure torque shock pulse with the presence of.

Rotary hammer hammer, but do not drill.

At deterioration of rubber products (O-rings) Hammer stop working in the "chiseling" mode. This happens gradually. impact strength is weakened in process of deterioration of rubber rings. The thing is, that a drunken bearing movement is transmitted to the percussion piston at 26, wherein the striker poz.27 creates air pressure and influences the impact bolt pos.28.

Rotary Hammer drills, but do not hammer.

If the punch you exert greater force, it can lead to the destruction of the impact bolt, jamming of the striker in the impact piston. Such problems can be solved only complete replacement of defective parts. In details troubleshooting Hammers Bosch.

Features Bosch 2-26 punch design

Repair perforator Bosch 2-26 should begin with a review of features in the design of the instrument to establish. The operating principle of the perforator Bosch 2-24 is similar to that action punch Bosch 2-26.

Rotation is transmitted from the rotor shaft, via the intermediate shaft, on the impact of the barrel shaft. simultaneously, mounted on the intermediate shaft bearing drunk transmits a percussion piston reciprocating.

At the gun, there are three modes of operation: with the impact drilling, without impact drilling, hit.

Helical poz.803 rotor gear transmits torque to the intermediate shaft gearwheel helical poz.823.

The intermediate shaft is similar to shaft design perforator Bosch 2-24 and itself and interchangeable parts, members of the intermediate shaft perforators Bosch 2-24, 2–26. Instructions for disassembling the gun Bosch.

The design of the hammer shaft barrel

The shaft of the hitting unit structures similar to the stem shaft barrel perforator Bosch 2-24. Result in damage to the fault of those same items, as in the Bosch hammer drill 2-24.

Features shaft perforator Bosch 2-26 in, that the driven large spur gear fixed to the shaft poz.22 three pins poz.37, in contrast to the fixing roller in the Bosch hammer drill 2-26.

Performing hitting unit disassembly shaft barrel perforator Bosch 2-26, Pay attention to the way the gears lock. Before removing the gear, it is necessary to remove three pins. For proper assembly of the punch Bosch.

findings:

1. Knowledge of the differences between the listed models Bosch rotary hammers will allow you to quickly perform disassembly tool, replace defective parts. To do this, you do not need to contact the customer service.
2. Structurally, the Bosch rotary hammers so simple, that allow you to repair almost any complexity.
3. You only need a willingness and basic knowledge in mechanics.

it happens, that caught the fake models of Bosch rotary hammer it more details.

Videos about disassembling the gun Bosch