Contents of
- 1 Basic differences in the design of Bosch guns
- 2 Schematic and design of the Bosch 2-20 drill
- 2.1 Design of the intermediate shaft of the perforator Bosch 2-20
- 3 Design features of the Bosch 2-24 drill
- 3.1 Design of the shaft of the perforator Bosch 2-24
- 3.2 Shaft shaft structure of impactor
- 3.3 Shock shaft bump problems
- 3.3.1 The hammer drills, but does not drill.
- 3.3.2 The perforator drills, but does not slot.
- 4 Features of the Bosch 2-26
- design Shaft shaft structure of the
- 5 impact device Conclusions:
- 5.1 Video about the disassembly of the Bosch
The most widespread among professional builders in Russia are Bosch perforators, and among the fans household models Bosch 2-20, 2-24, 2-26.The perforators not only work well, but are also easily repaired. They can easily be found any, a failed part.
The designs of the described guns have the same principle, to transfer the rotational moment from the rotor to the shaft of the barrel of the shock block with simultaneous transfer of the translational pulse to the working tool.
Structurally, the perforators are made in the same way, but the individual components or parts have their own characteristics.
If you know the specific differences between the models described Bosch perforators, then disassembly and repair by yourself will not be difficult.
Along with the originals on the Russian market there is a large number of falsifications of tools, including Bosch perforators.
Below are described the design features of models and ways of their disassembly and repair by one's own hands.
Principle of operation of the Bosch perforator
The principle of operation of the perforators is the same, but the design features are different.
The main parts used in these Bosch perforator models are interchangeable. This applies to the mechanical and electrical components.
But there are nodes and did, differing by the used details.
To perform the repair of the Bosch 2-20, 2-24, 2-26, it is necessary to know these differences. Knowledge of the design features of each perforator facilitates the process of repair, finding breakdowns and their elimination.
Bosch perforator designs are so simple that they allow you to perform simple repairs, practically with your own hands and replace any part without contacting service. You need to have the skills of an assembler, have elementary knowledge of electrical engineering and understand the principle of the perforator.
The main differences in the design of the Bosch
guns When repairing the Bosch perforator, you can not do without the electrical and disassembly tools of the model that you are going to repair.
Electrical diagrams of Bosch 2-20, 2-24, 2-26 are practically the same. Although there are some unprincipled differences.
But the mechanical blocks are completed with parts that differ constructively. The main differences are collected in two nodes: in the intermediate shaft and shaft of the barrel of the impact block.
The greatest differences are presented in the design of the intermediate shaft, assembly of the "drunk bearing", in the mode switch. Unprincipled features are present in the construction of the barrel of the impact block, impactor, striker.
Let's start with the Bosch 2-20 puncher.
Schematic and design of the Bosch 2-20 rotary hammer
The Bosch 2-20 rotary hammer can not be repaired without knowledge of the design of the machined tool.
The operating principle of the Bosch 2-20 perforator is based on the transfer of the rotational torque from the rotor shaft pos.3 to the shaft of the impact block pos.22 through the intermediate shaft pos. 824, while simultaneously transferring the longitudinal impulse to the working tool.
The rotor of pos. 3 transmits the rotational moment to the gear of the helical intermediate shaft pos. 824.
Bosch perforator scheme 2-20
The helical gear is fixed to the intermediate shaft and transfers the torque to the shaft. The shaft is fixed drunk bearing, receiving torque through the clutch. Due to its design, the drunken bearing transmits translational motion to the cylinder of the barrel of the impactor.
Design of the intermediate shaft of the perforator Bosch 2-20
The intermediate shaft of the perforator Bosch 2-20 consists of a bearing assembly( drunken bearing), a clutch, a large helical gear, a small straight-toothed cylindrical gear.
Most often, breakages are manifested in the wear of the clutch slots, which leads to the loss of rotation of the punch holder in the presence of a shock pulse.
Corrected by replacing the clutch or restoring the teeth of the clutch parts.
View of the intermediate shaft of the Bosch 2-20 punch
Features of the Bosch 2-24
perforator. The Bosch 2-24 hammer driller is best to begin with an introduction to the layout and design features of the tool to be adjusted. The operating principle of the Bosch 2-24 is similar to the Bosch 2-20 perforating principle.
The torque is transmitted to the tool holding shaft, simultaneously with the transfer of the shock pulse. The puncher has three operating modes: drilling with impact, drilling without impact, impact.
The helical gear of the rotor pos.803 transmits the rotational moment to the gear of the helical intermediate shaft pos.826.
Schematic diagram of the perforator Bosch 2-24
Design of the intermediate shaft of the perforator Bosch 2-24
The intermediate shaft of the perforator Bosch 2-24 consists of the rolling bearing assembly pos.830, the coupling clutch pos. 823, the switching parts pos.44 The couplingadhesion. It wears teeth. Repair of the clutch is to correct the profile of the gear teeth in the clutch and on the intermediate shaft.
Intermediate shaft of Bosch perforator 2-24 assembly
Shaft shaft construction of impactor
The shaft of the impact block is designed to transmit a rotational pulse while moving the impactor.
The rotation is transmitted from the spur gear of the intermediate shaft to the large spur gear pin22 of the shaft shaft pos. 821.
The reciprocating motion is transmitted through a drunken bearing pos. 830, the impact piston pos.26, the striker pos. 27, the impact bolt pos. 28 to the bolt, fixed in the cartridge pos.
The design is a shaft, hollow on one side. Parts are installed on the shaft on both sides.
On the mounting side of the cartridge on the shaft is installed spur gear pin pos.22 and fixed to the shaft by means of a roller pos.88, pressed against the shoulder of the shaft by a spring pos.80.The spring itself is fixed by a lock ring pos.85.
In the shaft cavity of the barrel of the impact block is inserted: the assembled shock bolt pos. 28 and the impact piston. A striker pos. 27 is inserted into the impact piston pos. 26 with the new rubber ring posed on it pos. 73.All rubber products are lubricated with the recommended lubricant.
Faulty shaft shaft of the impactor
Due to the weakening force of the spring, the loss of the locking roller gear can rotate on the shaft. This is manifested in the disappearance of the moment of rotation with the presence of a shock pulse.
Hammer drill bit, but does not drill.
When the rubber products( o-rings) wear out, the punch stops working in the "Chisel" mode. This happens gradually. The impact strength is weakened by the wear of the rubber rings. The thing is that from the drunken bearing the movement is transferred to the impact piston pos.26, in which the piercing posture 27 creates air pressure and acts on the impact bolt pos.28.
The perforator drills, but does not chisel.
If you are exerting a lot of force when operating a puncher, this can lead to the destruction of the impact bolt, the jamming of the striker in the impact piston. Such faults are eliminated only by a complete replacement of the failed part. For more information on troubleshooting the Bosch perforator.
Features of the construction of the Bosch 2-26
The Bosch 2-26 rotary hammer has to be repaired with an introduction to the design of the tool to be adjusted. The operating principle of the Bosch 2-24 is similar to that of the Bosch 2-26.
Bosch Rotary Hammer Scheme 2-26
Rotation is transmitted from the rotor shaft, via an intermediate shaft, to the shaft of the impact barrel. At the same time, the drunken bearing fixed on the intermediate shaft transfers reciprocating motion to the impact piston.
The perforator has three operating modes: drilling with impact, drilling without impact, impact.
The helical gear of the rotor pos.803 transmits the rotational moment to the gear of the helical intermediate shaft pos.823.
The intermediate shaft is similar to the shaft in the design of the Bosch 2-24 perforator and is interchangeable by itself and the parts included in the intermediate shaft of the Bosch 2-24, 2-26 perforators. Instructions for disassembling the perforator Bosch.
Shaft shaft structure of impactor
The shaft of the impact block is similar in construction to the shaft of the Bosch 2-24 gun. The faults are caused by faults of the same parts as in the Bosch 2-24 gun.
Shaft shaft diagram of the impactor
Features of the shaft of the perforator Bosch 2-26 in that the driven large spur gear pos.22 is fixed to the shaft by three pins pos.37, in contrast to the locking roller in the perforator Bosch 2-26.
When disassembling the shaft of the barrel of the percussion hammer block Bosch 2-26, pay attention to the method of fixing the gear. Before removing the gear, it is necessary to take out three pins. The order of the correct assembly of the Bosch perforator.
Conclusions:
• Knowing the differences between these Bosch perforator models will allow you to quickly disassemble the tool, replace faulty parts. To do this, you do not need to contact service.
• Constructively, Bosch perforators are so simple that they can repair almost any complexity.
• You only need the desire and basic knowledge in mechanics.
It happens that there are fake models of the perforator Bosch about this in more detail.
