Field of the invention

The invention relates to optional equipment for assembling tool to achieve a quick and flawless installation of the connecting components to the assembly of components and units.

Background of the invention

For assembly and disassembly of the demountable connections, especially screw connections, in the industrial processes there are today used the pneumatic drills, pneumatic screwdrivers, accu-screwd rivers, cordless-drills, and other type-identical instruments. The advantage of these tools is their easy operation, fast assembly and disassembly and a plentiful quantity of interchangeable screwdriver bits with different cross-sections of the ends for mounting screws with a varying groove in the head, e.g. the use of cross bit for screws with cross groove. In the case of industrial current installation, where these tools are globally used, it is required the rapid implementation of screwing or the location of the connecting components to the desired location. And the pressure to perform the operation in the shortest time brings the risk of incorrect placing of the bit into the groove in the head of the connecting part and the result is a slipping of the bit from the groove in the head of the screw. The bit then goes down to the surface of the material and may thus scratch the surface of the assembled object. It is a common phenomenon in the automotive industry, where on the assembly line there are mounted certain parts and if there is a damage of the surface, for example a painted door of a car, these must be repaired, what of course is economically and time-loss. There is currently not available such solution, which would simply and quickly significantly reduce scrap rates precisely because of the defects on the surfaces of the assembled parts. Summary of the invention

The abovementioned disadvantages removes this invention, the essence of which lies in the fact that it contains a hollow shaft, which is on the outer circumference on one end topped by a gradually structured fitting, that is larger. To this larger fitting a smaller fitting tightly fits. On the other end of the hollow shaft there is on its outer circumference arranged at least one groove for the snap ring. To the hollow shaft there is placed at least one pusher spring. The inner diameter of the pusher spring is greater than the diameter of the hollow shaft and at the same time, the outer diameter of the pusher spring is smaller than the diameter of the smaller fitting, with which one end is in contact. In the preferred embodiment, a pusher spring encircles the hollow shaft, in the way that there is possible free movement, pressing and reverse expansion of the pusher spring over the surface of the hollow shaft. On the hollow shaft along with the pusher spring there is mounted at least one hollow cylinder whose inner diameter is larger than the outer diameter of the pusher spring, and at the same time its outer diameter is smaller than the diameter of the larger fitting. The inner shell of the hollow cylinder is provided with at least one inner fitting. The diameter of the fitting of the hollow cylinder is smaller than the outer diameter of the hollow shaft. One surface of the inner fitting is in contact with the second end of the pusher spring and the second surface of the inner fitting is in contact with the snap ring.

In the preferred embodiment the hollow cylinder encircles the hollow shaft with the pusher spring and in the way that there is possible free movement of the hollow cylinder in the range defined by the distance between the larger fitting of the hollow shaft and the snap ring. The pusher spring is arranged between the smaller fitting of the hollow shaft and the internal fitting of the hollow cylinder.

It is advantageous that the internal opening of the hollow shaft is of the circular diameter or is arranged in the shape of a hexagon.

It is useful that the larger fitting of the hollow shaft is provided with at least one pass- through opening for the location of the fastening component. In the preferred embodiment a pass-through hole is provided with a thread and the fastening components are screws. It is also useful that the hollow cylinder is provided with at least one metal magnetic o-ring.

Description of the drawings

Fig. 1 - schematic representation of the additional optional equipment for assembling tool, axonometric view

Fig. 2 - representation of the optional equipment for assembling tool, the elevation view

Fig. 3 - section A-A, showing the arrangement and linkage of the individual elements of the optional equipment for assembling tool

Fig. 4 - detail A, representation of the placing of the snap ring in the groove for the snap ring on the hollow shaft

Example of embodiment of the invention

The optional equipment for assembling tool, according to this invention contains a hollow shaft 1, which is on the outer circumference on one end topped by a gradually structured fitting H, which is larger. To this larger fitting H a smaller fitting 12 tightly fits. On the other end of the hollow shaft 1 there is on its outer circumference arranged at least one groove 13 for the snap ring 4. The snap ring 4 is in the preferred embodiment strut snap ring in the opening. To the hollow shaft 1 there is placed at least one pusher spring 2. The inner diameter of the pusher spring 2 is greater than the diameter of the hollow shaft 1 and at the same time, the outer diameter of the pusher spring 2 is smaller than the diameter of the smaller fitting 12, with which one end is in contact in the way that the end of the pusher spring 2 tightly fits to the surface of the fitting 11 ' ⁿ the preferred embodiment, a pusher spring 2 encircles the hollow shaft 1, in the way that there is possible free movement, pressing and reverse expansion of the pusher spring 2 over the surface of the hollow shaft 1. On the hollow shaft 1 along with the pusher spring 2 there is mounted at least one hollow cylinder 3 whose inner diameter is larger than the outer diameter of the pusher spring 2, and at the same time its outer diameter is smaller than the diameter of the larger fitting 11 The inner shell of the hollow cylinder 3 is provided with at least one inner fitting 31 One surface of the inner fitting 31_is in contact with the second end of the pusher spring 2 and the second surface of the inner fitting is in contact with the snap ring 4. In the preferred embodiment the hollow cylinder 3 encircles the hollow shaft I with the pusher spring 2 and in the way that there is possible free movement of the hollow cylinder 3 in the range defined by the distance between the larger fitting

11 and the snap ring 4. The pusher spring 2 is arranged between the smaller fitting

12 of the hollow shaft I and the internal fitting 3J. of the hollow cylinder 3.

The internal opening of the hollow shaft I in the preferred embodiment is of the circular diameter or is arranged in the shape of a hexagon. The choice of cross section depends on the type of the tool -bit. The internal opening may have any cross section according to the applied assembling tool.

The larger fitting H of the hollow shaft 1 is provided with at least one pass-through opening 5 for the location of the fastening component. In the preferred embodiment at a greater fitting H there are made two holes against each other. In the preferred embodiment pass-through openings 5 are provided with a thread and the fastening components are screws.

It is also useful that the hollow cylinder 3 is provided with at least one metal magnetic o-ring 6.

The optional equipment for assembling tool is positioned on the assembling tool, which is fixed in the screw device. By fastening component in the preferred embodiment, using two screws, the optional equipment for assembling tool is stably mounted on the assembling tool. In a preferred embodiment the assembling tool is a bit for mounting screws, which is fixed in the accumulation screwdriver. The length of the tool for protection is preferably adapted to the length of the bit so that the working end of the bit is placed and covered with optional equipment for assembling tool. The worker places the working part of the bit to the screw or other component that he wants to be mounted. By the pressure on the head of the screw, the hollow cylinder 3 by the pressing of the pusher spring 2 moves in the axis of the hollow shaft 1 and stops on the larger fitting V\_ of the hollow shaft 1. The working part of the bit will be moved out of the optional equipment for assembling tool and thus it is possible to mount the screws. In the case that a worker will move further a screw device, a pusher spring 2 is released and thereby the hollow cylinder 3 moves in the axis of the hollow shaft 1 in a position which covers the working part of the bit. This position of the hollow cylinder 3 is defined by the location of the snap ring 4 on the hollow shaft 1.

This covering of the working part of the bit is effective to prevent damage of the assembled part, primarily the avoidance of damage of the surface protection.

In the case of an unwanted moving further a bit from the head of the screwed part, by the pusher springs 2, the bit is inserted into the hollow cylinder 3, which thus prevent from the slipping of the bit across the surface of the assembled part.

In the preferred embodiment the end of the hollow cylinder 3 is in the part that covers the working part of the bit, is fitted with the metal magnetic o-ring 6, for a more accurate placing of the bit into the head of the screwed component.

Industrial applicability

Optional equipment for assembling tool can be advantageously used for assembly works, where is the requirement for fast and high-quality embodiment, so as in the way not to damage the assembled components or assembled semi-finished products. This optional equipment for assembling tool can be mainly used on the assembly lines and the jet assemblies, in particular in the automotive industry. List of reference numbers

1 - hollow shaft

11 - larger fitting

12 - smaller fitting

13 - groove for the snap ring

2 - pusher spring

3 - hollow cylinder

31 - inner fitting

4 - snap ring

5 - pass-through opening

6 - metal magnetic o-ring