DE1935828U - MULTI-EDGED WRENCHES, IN PARTICULAR SQUARE LATHE CHUCK WRENCHES. - Google Patents

Description

W "~ Attaches

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Patent attorney DIPL-ING.INGRISCH, WUPPERTAL-ELBERFELD wALi. 27/29

■ · "■■ Wuppertal-Elberfeld, December 18, 1965.. I / Pee / hi ...

Utility model registration
Lawyer File No. 3705

Paul Elverfeld, Bad Honnef / Rhine

Polygon wrenches, especially square lathe chuck wrenches

The innovation relates to a polygon wrench, in particular a square lathe chuck key, how it is used to smooth the jaws of the lathe chuck via a gearbox and to move centrically towards the workpiece to be clamped. Such lathe chuck keys normally consist of a square, which is inserted into the corresponding square holes of the lathe chuck is plugged in. 'L

To the

German Patent Office

M ü η che "η 2
Zweibrückenstrasse 12th

It often happens that lathe chuck keys are forgotten and left in the putter, so that if you accidentally turn on the lathe, the key on the lathe bed suggests and, due to its stable design, cause considerable damage in this way can. On the other hand, there is also the risk that at high speed of the lathe

A lathe chuck wrench that has been stuck is thrown out of the putter as a result of centrifugal force, which in in many cases led to property damage or injuries to the operator

The task on which the innovation is based is to use a polygonal key, in particular a square lathe chuck key, to be trained in such a way that accidentally stuck, for example, in the putter Lathe remains excluded from the start.

The polygon key according to the invention is the solution to this problem characterized by a key shaft that surrounds it and is captively connected to it Protective sleeve which is displaceable along the key shaft and the end of which is approximately at the level of the insertion end of the Key shaft, and by a helical compression spring clamped between the key shaft and protective cover, which loads the protective cover in the direction of the insertion end »Such a key offers the advantage of that this falls automatically from the lathe chuck by the action of the helical compression spring after it is released, so that the disadvantages described above are completely avoided. ■, · ^

According to one embodiment of the innovation, the key shaft can have a circumferential shoulder in its rear area have, between the and the retracted front end

the protective sleeve surrounding the key shaft is where the helical compression spring is located. Another advantageous feature of the innovation is that in the head of the key shaft there are two radial bores offset from one another by 90 ° Inside the other hole protrudes. It has also proven to be very advantageous to provide a grip sleeve that extends over the rear end of the protective sleeve with two opposing circular openings. According to another innovation, the protective sleeve has two opposite elongated holes in its rear part, while finally the innovation also consists in the fact that through the circular openings of the reef sleeve, the elongated holes of the protective sleeve and the free bore of the key shaft a toggle extends _t in whose central recess the tip of the locking pin is located.

About the innovation, for example, with standard square socket wrenches To be able to realize the innovation provides that the rear end of the key shaft and the Toggle with a plastic cap are pressed, which is aligned with the protective sleeve, open to the front Has an annular slot into which the rear end of the protective sleeve is inserted and held by locking projections is. It can also be provided that a

.Securing pin axially from the rear into the key shaft and is plugged into the gag, which.durbh an in the handle cap arranged spring is held in place. ■

The innovation is detailed below with reference to the drawing explained in the Pig. 1 to 5 show different exemplary embodiments.

The lathe chuck key according to the innovation consists of the square shaft 1, the front end of which is a square is designed for insertion into a correspondingly shaped opening of the lathe chuck and its rear End has a larger diameter, so that a shoulder 11 approximately in the last third of the square shaft

. arises. ' The square shaft 1 also has in the area the thickening at its rear end has a larger radial bore 12 and a smaller radial one Hole 13. The greater part of the square shaft 1 is enclosed by a protective sleeve 2, one of which

■ is drawn in at the end of 21 and has a clear width that is approximately . Corresponds to the diameter of the square. Between the retracted end 21 of the protective sleeve 2 and the. Shoulder of the ¥ ierkäntschaftes 1 extends a helical compression spring 3, which strives to make the square shank 1 in

^; to pull in the protective sleeve 2. The rear part of the square shaft 1 is covered by a grip sleeve 4 which has two circular openings 41 and 42 opposite one another.

The protective sleeve 2 has in the area of the thickening of the square shaft 1 two opposite elongated holes 22. Through the two circular openings 41 and 42 of the grip sleeve 4 and through the two underlying elongated holes 22 of the protective sleeve 2 and through the bore 12 in the rear Part of the square shaft 1 extends a toggle 5, which has a locking recess (not visible) in the middle - .. has, in which a seated in the bore 13 of the square shaft 1 and standing under the action of a spring Locking pin (not visible) engages.

By engaging the locking pin in the locking recess . of the toggle 5 is a permanent connection between the toggle and the remaining parts of the lathe chuck key

created so that unauthorized removal of the screws -, - · compression spring 3 is impossible in any case. One is just taking apart the lathe chuck key after all

possible shearing of the securing pin, which _for: practically can not occur the case that a hardened and adequately dimensioned pin is used with a high shear strength.

In practical use, the retracted, annular end 21 of the safety sleeve 2 is on the edge of the square hole placed in the lathe chuck and the square - against the pressure of the helical compression spring 3 in the square hole plugged in. By turning using the long enough protruding from the grip sleeve on both sides "Toggle parts can be tightened to the lathe chuck.

-S-

Should the operator remove the key from the chuck bore If you forget to pull out, the pressure of the helical compression spring 3 causes the protective sleeve 2 moved relative to the square shaft 1, whereby the square is drawn into the protective sleeve 2, so that the lathe chuck key falls off the lathe chuck due to its weight. In this way, all of them become The possibility of accidents and damage is excluded, as the key according to the innovation is always in accordance with the spring 3 loosens automatically from the lathe chuck.

Fig. 2 to 5 show embodiments in which Uorm square socket wrench are used. FIG. 2 also has a special feature compared to FIG inwardly protruding sleeve at the drawn-in front end 21 ' the protective sleeve 2, the inner diameter of which corresponds to the diameter of the central shaft part 15 and the improves the guidance of the protective sleeve 2 " Instead of the annular shoulder 11 (which is not in the position shown in FIG. 1 in the case of a Wprm key), in 2 a bearing ring 11 is provided for the spring 3, which ring is held in its position by the toggle 5. Farther an axial bore is provided in Fig. 2 at the rear end of the key shaft, in which a locking pin H is inserted »The locking pin is secured by a Spring 15 'held in its position, which in turn in a correspondingly dimensioned recess in the grip sleeve located" "·.·'. .

In the Pig. 3, the entire rear end of the key shaft 1 and the toggle 5 are pressed around with a protective cap or grip sleeve 4 ″. At its forwardly directed end, the grip ^{sleeve 4 1} 'has an open-edged, cylinder jacket-shaped slot 16 into which the protective sleeve 2 ¹¹ protrudes with its rear end. The grip sleeve 4 ″ is designed to be elastic in the area of the slot 16 and on the inner leg of the legs forming the slot 16 has a narrowing 17 which cooperates with a thickening 18 at the rear end of the protective sleeve 2 ″ in such a way that the protective sleeve is inserted after insertion is held captive in the slot 16 in this. In this embodiment as well as in the embodiments according to the Pig. 4 and 5 are further interventions guide (not shown) is provided, is prevented by the rotation of the protective sleeve relative to the key shank · ₀

At the one in Pig. 4, the constriction 17 'is attached to the opening of the slot on the outer leg of the protective cap 4 ^lfl , and the thickening 18 ^f at the rear end of the protective cover 2 * * * is in contrast to Pig. 3 here directed outwards.

'Pig. 5 shows an embodiment in which the inner Leg of the grip sleeve or the protective cap omitted and the spring 3 to the bottom of the now only through the outer leg and the key shaft formed slot is guided. {'';

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Of course, the inflation is not on the one shown Embodiments limited; rather, they are - as far as the state of the art allows this A number of possible modifications are available, all of which are derived from the individual claims, descriptions and Drawing features result.

PROTECTION REQUIREMENTS _ 8 -

Claims (8)

Protection claims 1. Polygon wrenches, especially square lathe chuck wrenches, characterized by a key shaft (1) enclosing and captive with this connected protective cover (2), which is displaceable along the key shaft and the end of which is approximately in Height of the insertion end of the key shaft is, and by a clamped between the key shaft and protective sleeve Helical compression spring (3) »which loads the protective sleeve in the direction of the insertion end. 2. Polygonal key according to claim 1, characterized in that the square shaft has a has circumferential shoulder, between and the drawn-in end of a protective sleeve surrounding the square shaft there is a helical compression spring. 3. polygonal key according to claims 1 and 2, characterized in that in the Head of the key shaft two radial bores offset from one another by 90 are located, in one Bore a standing under the action of a spring locking pin is arranged, which is a little in the Inside the other hole protruded • ι ( -9 - 4 © Polygonal key according to claims 1-3, characterized by a grip sleeve that overlaps the rear end of the protective sleeve and has two opposing circular openings ₀ 5. Polygonal key according to claims 1 to 4, characterized in that the protective sleeve in your rear part has two opposite 'elongated holes. 6. polygonal key according to claims 1 to 5, characterized in that through the circular openings in the grip sleeve, the elongated holes in the protective sleeve and the free hole in the square shaft a toggle extends, in the central locking recess the ■ The tip of the locking pin engages » 7. Polygonal key, in particular according to claim 1, characterized in that the rear end of the key shaft (1) and the toggle (5) with a plastic ^{cap (4 *, 4 ", 4 1} ") are pressed around which one with the Protective sleeve (2) has aligned, forwardly open annular slot (16) into which the rear end of the protective sleeve is inserted and held by locking projections (17, 18). ,. . - 10 - ■■ - ■■ ■ ■■■■ ■: .- ■ / I - 10 - ■ 8. Polygonal key according to one or more of the preceding claims, characterized in-η ·· β t that a locking pin (H) is inserted axially from the rear into the key shaft (1) and the toggle (5) which is held in its position by a spring (15) arranged in the handle cap (4 ') »