DE7609688U1 - SCREW KEY - Google Patents

Description

H-l / 76 25.2.76 / Ri

Bernhard Hutter, Bassersdorf / Switzerland

Screw cross wedge

The invention relates to a screw transverse wedge, in particular for cutting tapered shanks, with two in a first opening of a screw transverse wedge body movable, at least approximately trapezoidal wedges and one located in a second opening of the screw transverse wedge body and acting on the internal wedge Clamping device.

There are already screw transverse wedges for tensioning taper shafts known, the two perpendicular to each other Have openings in the screw transverse wedge body and in the in one opening two trapezoidal wedges are arranged. The other opening is for a screw provided with a thread. One in this opening

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Removable grub screw presses on the internal wedge. By screwing in the grub screw, the inner wedge is shifted so that the overhead wedge emerges from the opening. Such screw transverse wedges are known, for example, from a brochure from the company "Haueisen & Sohn ⁿ , Neuenbürg / Württemberg.

However, practice has shown that cross-wedges on the market cannot be loosened without any problems. This often made it necessary to drill out the screw cross wedge, which not only destroyed the screw cross wedge, Bonder also the boring machine spindle was damaged. Besides Boring requires hours of work. Furthermore, it comes when large axial forces occur or by vibrations that the cone of the tool still many tenths of a millimeter into the inner cone of the tool holder is pressed in and the screw cross wedge is no longer firmly seated. The screw cross wedges are then thrown away at high speed in some cases. This poses a significant risk, especially for the in staff working in the vicinity.

It is the object of the invention to create a screw transverse wedge of the type mentioned at the outset, which especially due to easy installation and removal as well as secure fixation of the screw cross wedge in the tool holder excels.

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This task is achieved according to the invention with a screw cross vault solved in that the wedges are mechanically connected to each other, the clamping means with both of the at least approximately parallel sides of the inner wedge is in operative connection and a means for fixing of the screw transverse wedge body is provided in the tool holder.

As a mechanical connection of the wedges, two interlocking

gripping claws particularly suitable, wherein it is advantageous that the claws over the entire length of the extend oblique surfaces of the wedges. This design is particularly easy to manufacture and safe function. A screw which can be countersunk in the screw transverse wedge body is preferably used as the clamping means Seen goal. For reliable movement of the two wedges, it is advisable that 6 le screws close the internal wedge penetrates and the screw has a means for safe return at the end opposite the thread, This means can, for example, be a sleeve attached to the screw end. Preferably the means is for Fixation of the screw cross wedge in the tool holder a shoulder on the underside of the screw cross wedge body.

Further details of the invention emerge from an exemplary embodiment explained below with reference to the drawing.

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In the drawing shows:

Pig. 1 a screw transverse wedge according to the invention,

Pig. 2 a lower part of a tool holder with an inserted tool and an installed screw cross wedge,

3 shows a trapezoidal wedge, FIG. 4 shows a claw arrangement,

5 shows a screw that can be countersunk in the screw transverse wedge body, FIG. 6 shows a sleeve.

The screw cross wedge 1 shown in Fig. 1 consists essentially of a screw cross wedge body 2, in which a first opening 2 'and a second opening 2 ¹¹ are located,

is provided. In the first opening 2 'there are white trapezoidal ones Wedges 3, 4 mounted, which have claws 5 on their inclined surfaces, which interlock so that the Wedges 3, 4 are displaceable against each other. The arrangement of the claws 5 is shown in Fig. 3 and Fig. 4, wherein one claw belongs to wedge 3 »the other belongs to wedge 4., The inner wedge 4 has a bore 4 'through the one screw located in the second opening 2 ' is plugged. The screw 6 is designed as a grub screw 7 at one end and with a pin at the other end provided on which a sleeve 9 is attached, for example

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is glued on. The shapes of the screw 6 and the sleeve can be seen from FIGS. 5 and 6. The screw transverse wedge body 2 has a shoulder 10 on the underside.

To assemble the screw transverse wedge according to the invention, the trapezoidal wedges ~ $, k are first mounted in such a way that the claws 5 intermesh. Then the wedges 3, ¹ J are inserted into the opening 2 ^{f of} the screw transverse wedge body 2, the wedge ¹ I being on the inside and with the longer of its two parallel surfaces facing the part of the opening 2 ^{11 provided with the thread 2 11} '. Now the screw 6 is inserted into the opening 2 ^fl and screwed in all the way. The inner wall of the sleeve 9 is sparingly coated with adhesive and pushed onto the pin 8 of the screw. It is important to ensure that no adhesive gets onto the outer wall of the sleeve 9 or into one of the openings 2 ¹ , 2 ¹¹ . Since it is sufficient with the adhesives available today to only partially wet the adhesive surface, this requirement can easily be met.

2 shows a tool holder 11 with a tool 12, for example a drill, inserted into its inner cone. In the transverse slots 11 ', 12' of the tool holder 11 un ^ of the tool 12, which are aligned so that they form a common transverse slot is

a screw cross wedge 1 is used, the shoulder 10 engaging in an opening 13 in the tool holder 11. The screw cross wedge 1 is shown in such a way that it is in operative connection with the tool holder 11 and the tool 12.

To insert the screw transverse wedge 1 according to the invention, the transverse slots 11 ', 12' of the tool holder 11 and of the tool 12 are first aligned in such a way that a common transverse slot is created. Then the screw transverse wedge 1 is inserted into this transverse slot so that the shoulder engages in the opening 13 of the tool holder 11. The screw 6 is then screwed into the screw transverse wedge body 2, as a result of which the inner wedge 4 ^{presses the overhead wedge 3 against the upper shaft part I 1} J of the tool 12. The tool holder is thus connected to the tool 12 in a force-locking manner.

To remove the screw cross wedge 1, the screw 6 is unscrewed; the inner wedge 4 follows the longitudinal movement of the screw 6. Due to the mechanical connection of the Wedges 3, 4, the wedge 3 is in the first opening 2 'of the Screw cross wedge body 2 pulled in. As a result, the screw cross wedge 1 is given a sufficiently large play so that it comes off the transverse slot can be removed.

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Claims (5)

G 7b 09 688.3:. * * '; Γ * "..: ·. · * .. * η - 1/76 - D 9.9.1977 Protection claims 1. Screw cross wedge, especially for clamping taper shanks, with zuei in a first opening of a screw cross wedge body movable, at least approximately trapezoidal wedges, which are attached to the by means of a claw-like arrangement inclined surfaces are directly mechanically connected to one another, and one in a second opening of the screw transverse wedge body located, on the inner wedge uirkenden clamping means, characterized in that the Arrangement for mechanically connecting the wedges (3, 4) at least to the same, approximately L-shaped claws (5), which interlock, comprises the clamping means (6,7,8,9) a screw (6) with one end designed as a calf screw (7) and one end designed as a pin (θ) is the screw (6) penetrates the inner wedge (4) and with both of the approximately parallel sides of the inner wedge (4) is in Uirk connection, on the end of the screw (6) designed as a pin (8) a sleeve (9) is attached and a means (10) for fixing the screw transverse wedge body (2) is provided in the tool holder (11). 2. screw cross wedge according to claim 'i, characterized in that that the claws (5) extend over the entire length of the inclined Extend surfaces of the wedges (3, 4). 7609688 09.OZ78 G 76 09 638.3 ·· *. **. . ·· ·· H-1/76-D 3. screw cross wedge according to claim 1, characterized in that that the screw (6) in the screw transverse wedge body (2) is usrable. 4. screw cross wedge according to claim 1, characterized in that the sleeve (9) on the pin (8 * of the screw (6) is glued. 5. screw cross wedge according to claim 1, characterized in that that the means for fixing in the Uerkzeughalter (11) a shoulder (10) on the underside of the screw transverse wedge body (2) is. 7609688 09.0178