EP2781309A2 - Universal wrench - Google Patents

Abstract

The wrench (1) has central middle portion (2) whose sides are provided with key arms (3-6) to which recording units are arranged for applying separate tool heads. The key arm (3,5) has inner profile (7,10) into which inner profile of auxiliary tool head (11,30) is guided axially and respectively along displacement path of auxiliary tool head between inactive position, in which inner profile of auxiliary tool head is moved into inner profile of key arm, and active position, in which auxiliary tool head is projected outward beyond inner profile of auxiliary tool head.

Description

The invention relates to a universal key, for example a control cabinet key, with a plurality of key arms extending from a central middle part, on which tool heads and / or receiving devices for attaching separate tool heads are arranged.

In a known control cabinet key of the type mentioned ( DE 202 16 931 U1 ) four arms are provided in the manner of a cross key. The key arms are formed at their outer ends as tool heads of various types. Individual tool heads can also be fitted with adapters that serve to receive a bit.

Although such key cabinet keys have proven themselves in practice, but the number of tool heads is limited in these.

To increase the number of tool heads, for example, a cross key ( DE 20 2009 005 858 U1 ), which at the ends of the key arms revolver-like rotatable elements having tool heads of different types and sizes at their opposite ends. However, such a cross key is relatively expensive.

The invention has for its object to provide a universal key that allows a multiplication of the type and size of different tool heads with little technical effort.

1. 1.
   • Es ist mindestens an einem der Schlüsselarme ein stationärer Werkzeugkopf mit einem Innenprofil angeordnet;
   • in dem Innenprofil ist ein innerer Zusatzwerkzeugkopf axial verschieblich und nicht drehbar geführt;
   • der Verschiebungsweg des Zusatzwerkzeugkopfs ist zwischen zwei Extrempositionen begrenzt, und zwar zwischen einer inaktiven Position, in der er in das Innenprofil des stationären Werkzeugkopfs hinein verschoben ist und einer aktiven Position, in der er nach außen über das Innenprofil des stationären Werkzeugkopfs hinaus vorsteht.
2. 2.
   • An mindestens einem der Schlüsselarme ist ein stationärer Werkzeugkopf mit einem Außenprofil angeordnet;
   • auf dem Außenprofil ist ein äußerer Zusatzwerkzeugkopf in Form einer Schiebehülse axial verschieblich und nicht drehbar geführt;
   • der Verschiebungsweg der Schiebehülse ist zwischen zwei Extrempositionen begrenzt, und zwar zwischen einer inaktiven Position, in der die Schiebehülse gegenüber dem Außenprofil des stationären Werkzeugkopfs zurückversetzt ist, und einer aktiven Position, in der sie über das Außenprofil des stationären Werkzeugkopfs hinaus vorsteht.

According to the invention, this object is achieved in two ways:

1. 1.
   • It is arranged at least on one of the key arms, a stationary tool head with an inner profile;
   • in the inner profile, an inner additional tool head is axially displaceable and not rotatably guided;
   • the displacement travel of the auxiliary tool head is limited between two extreme positions, between an inactive position in which it is displaced into the inner profile of the stationary tool head and an active position in which it projects outwardly beyond the inner profile of the stationary tool head.
2. Second
   • At least one of the key arms a stationary tool head is arranged with an outer profile;
   • on the outer profile, an outer auxiliary tool head in the form of a sliding sleeve is axially displaceable and guided non-rotatably;
   • the displacement of the sliding sleeve is limited between two extreme positions, between an inactive position in which the sliding sleeve is set back relative to the outer profile of the stationary tool head, and an active position in which it protrudes beyond the outer profile of the stationary tool head.

Accordingly, in the case of the two different systems, the additional tool heads are displaceable and not rotatable in the inner profile of a stationary tool head and are mounted displaceably and non-rotatably on the outer profile of a stationary tool head.

In addition, it is also possible to combine the two systems on a single wrench arm with each other, wherein at least one of the stationary tool heads both an inner auxiliary tool head and an outer auxiliary tool head is arranged in the form of a sliding sleeve.

Thus, if, for example, four key arms are provided in the manner of a cross key in the universal key according to the invention, then three variants are possible on each key arm, namely firstly the stationary tool head itself, secondly the outer displaceable tool head and thirdly the displaceable inner auxiliary tool head.

In this way, twelve different tool heads can thus be mounted with little effort in a cross-key.

To limit the displacement paths of the additional tool heads may be provided in each case a pin-slot guide.

To facilitate handling, the inner and outer auxiliary tool heads are preferably biased toward their active positions by means of a compression spring so that they always assume their operating positions. If, for example, the stationary tool head is in demand, the additional tool heads automatically slide back when they are inserted onto the element to be actuated.

In the case of the inner auxiliary tool heads, the respective pressure spring is expediently abutted against its inner end side.

When designed as sliding sleeves outer auxiliary tool heads, the respective compression spring is appropriate against the seated on the sliding sleeve pin of the pin-slot guide.

The pins of the pin-slot guides are preferably designed as dowel pins, on the one hand sit in a bore of the respective additional tool head and on the other hand engage in an arranged in the respective stationary tool head, axially extending longitudinal slot, wherein the slot length limits the displacement path of the respective additional tool head.

With the measures according to the invention, various tool head profiles can be realized. In this case, the inner profile of the stationary tool head can be an internal tappet, a square socket, a hexagon socket or the like. As an outer profile of the respective stationary tool head, an external striking, an external square, an external hexagon, a double-bit profile or the like may be provided.

The inner profile of the sitting on the stationary tool head sliding sleeve is adapted to the outer profile of the stationary tool head.

The additional tool heads can have a wide variety of profiles. For example, the outer sliding sleeve can be provided at its active, serving as an additional tool head end with two offset by 90 ° to each other Innenvierkantprofile different sizes, whereby the number of possible variations is still increased.

Fig. 1:

ein Ausführungsbeispiel eines Kreuzschlüssels, an dessen Armen verschiedene Variationsmöglichkeiten der Werkzeugköpfe dargestellt sind, und

Fig. 2:

in vergrößerter Darstellung eine Einzelheit aus Fig. 1.

The invention is illustrated by way of example in the drawing and described in detail below with reference to the drawing. Show it:

Fig. 1:

an embodiment of a cross key, on whose arms different variations of the tool heads are shown, and

Fig. 2:

in an enlarged view a detail Fig. 1 ,

In Fig. 1 a cross-key 1 is shown, are provided on the four outgoing from a central part 2 key arms 3, 4, 5, 6.

Each of the four key arms carries at its outer end a stationary tool head, which has the appropriate features for the intended application.

The key arm 3, for example, with an internal detractor 7, the key arm 4 with a double bit profile 8, the key arm 5 with an external square 9 and the key arm 6 turn with an internal tappet 10, which could be formed but also easily as a square or hexagon.

The key arm 3, which is provided with an internal tongue 7, carries an inner additional tool head in the form of a triangular sliding sleeve 11, which fits positively into the internal detacher 7 of the key arm 3 and is guided in this longitudinally displaceable. Due to their triangular formation, the sliding sleeve 11 is fixed simultaneously in the direction of rotation.

The displacement path of the triangular sliding sleeve 11 is limited between two extreme positions, between an inactive position in which it is displaced into the internal quick-change 7, and an active position in which it protrudes outwards beyond the internal tip 7.

To limit the displacement of the triangular sliding sleeve 11 is a pin-slot guide. For this purpose, a slot 12 is provided in the key arm 3 on opposite sides, while the triangular sliding sleeve 11 has a continuous transverse bore 13. When the triangular sliding sleeve 11 is inserted into the internal detacher 7, from the outside through the slot 12 and the transverse bore 13, a clamping pin 14 is inserted, which can slide in the slot 12 in the longitudinal direction of the key arm 3 and thereby the triangular sliding sleeve in the internal striking between the two extreme positions leads.

In addition, a compression spring 15 is provided between the middle part 2 and the inner end face of the triangular sliding sleeve 11, which presses the triangular sliding sleeve 11 permanently in its active position in which it protrudes from the internal tip 7 of the key arm 3. In this position is serving as an additional tool head triangular sliding sleeve 11 ready. If, on the other hand, the inner trimmer 7 is to be used as a tool head, the key arm 3 is placed on the corresponding workpiece, as a result of which the triangular sliding sleeve 11 automatically shifts against the pressure of the spring 15 inwards into its inactive position.

The key arm 4, which is formed with a stationary tool head in the form of a double-bit profile 8, is combined with an outer sliding sleeve 16. The sliding sleeve 16 is mounted longitudinally displaceable on the key arm 4 and secured against rotation due to the double-bit profile 8. Also, the sliding sleeve 16 is back and forth between two extreme positions, the limitation of the sliding path by means provided in the key arm 4 longitudinal slots 17, in which a clamping pin 18 is guided, is effected. The clamping pin 18 extends through a provided in the outer sliding sleeve 16 transverse bore 19 and in the longitudinal slots 17 therethrough. In the interior of the key arm 4 between the middle part 2 and the clamping pin 18, a compression spring 15a is provided, which always holds the outer sliding sleeve 16 in its active position.

As in particular from Fig. 2 shows, the sliding sleeve 16 at its working end an inner profile 20, which has two mutually offset by 90 ° Innenvierkantprofile different sizes.

In the case of the key arm 5, the tool head of which has the shape of an external square 9, the two different systems described in connection with the key arms 3 and 4 are combined.

In the key arm 5, a longitudinally displaceable inner part 21 is provided in a similar manner as in the key arm 3, the stroke limitation by means provided in the key arm 5 on opposite sides longitudinal slots 22nd and a through this and a provided in the inner part 21 transverse bore 24 extending clamping pin 23 is effected.

As with the arrangement within the key arm 3, the inner part 21 is loaded by a compression spring 25 in this embodiment, which is supported against the bottom of the inner part 21 and this always presses in its active position.

Externally on the trained as a square key arm 5 is also designed as a square sliding sleeve 26 is longitudinally displaceable and rotatably guided. The stroke limitation of the sliding sleeve 26 takes place, as in the case of the key arm 4, by means of longitudinal slots 27 formed on both sides of the key arm 5 and a tensioning pin 28 which extends through a transverse bore 29 provided in the sliding sleeve 26 and the slots 27.

Also, the sliding sleeve 26 can be pressed by means of a compression spring, not shown in the drawing into its working position, wherein the compression spring between the middle part 2 and the clamping pin 28 may be arranged.

The key arm 6, the stationary tool head according to the drawing is an internal clockwise, is used in the illustrated embodiment for receiving an adapter 30, in which a bit with any working end, such as a screwdriver bit can be inserted into a corresponding receiving opening 31.

As can be seen from the drawing, there are therefore various possible variations for the embodiment of the universal key according to the invention.

If all four key arms have the triple combination illustrated by the example of the key arm 5, the universal key can have twelve different tool heads to unify.

LIST OF REFERENCE NUMBERS

1

cross keys

2

midsection

3

key arm

4

key arm

5

key arm

6

key arm

7

Inside Triangular

8th

Double-bit profile

9

Outside Square

10

Inside Triangular

11

inner triangular sliding sleeve

12

longitudinal slots

13

cross hole

14

dowel pin

15

compression spring

15a

compression spring

16

outer sliding sleeve

17

longitudinal slots

18

dowel pin

19

cross hole

20

internal profile

21

inner part

22

longitudinal slot

23

dowel pin

24

cross hole

25

compression spring

26

sliding sleeve

27

Längsschlitz4

28

dowel pin

29

cross hole

30

adapter

31

receiving opening

Claims (15)

Universal key having a plurality of key arms extending from a central central part (2), on which tool heads and / or receiving devices for attaching separate tool heads are arranged, characterized in that arranged at least on one of the key arms (3) is a stationary tool head with an internal profile (internal rotary 7) in that in the inner profile an inner auxiliary tool head (triangular sliding sleeve 11) is axially displaceable and non-rotatably guided and that the displacement path of the additional tool head is limited between two extreme positions, between an inactive position in which he moved into the inner profile of the stationary tool head is and an active position in which it projects outwardly beyond the inner profile of the stationary tool head. Universal key according to claim 1, characterized in that a pin-slot guide is provided to limit the displacement path of the inner auxiliary tool head. Universal key according to claim 1 or 2, characterized in that the additional tool head is biased towards its active position by means of a compression spring (15). Universal key according to claim 3, characterized in that the compression spring (15) rests against the inner end face of the additional tool head (triangular sliding sleeve 11). Universal key with a plurality of key arms extending from a central central part (2), on which tool heads and / or receiving devices for attachment Separate tool heads are arranged, characterized in that at least one of the key arms (4) a stationary tool head with an outer profile (Doppelbartprofil 8) is arranged, that on the outer profile an outer additional tool head in the form of a sliding sleeve (16) guided axially displaceable and non-rotatable is that the displacement of the sliding sleeve (16) between two extreme positions is limited, namely an inactive position in which the sliding sleeve (16) is set back relative to the outer profile of the stationary tool head, and an active position in which they on the outer profile of the projecting stationary tool head. Universal key according to claim 5, characterized in that a pin slot guide is provided to limit the displacement path of the sliding sleeve (16). Universal key according to claim 6, characterized in that the sliding sleeve (16) is biased towards its active position by means of a compression spring (15a). Universal key according to claim 7, characterized in that the compression spring (15a) rests against the pin (18) of the pin-slot guide seated on the sliding sleeve (16). Universal key according to claim 2 or 6, characterized in that the pin of the pin-slot guide is a clamping pin (14; 18). Universal key according to claim 1 and 5, characterized in that at least one stationary tool head both an inner auxiliary tool head (inner part 21) and an outer additional tool head (sliding sleeve 26) is arranged. Universal key according to claim 1, characterized in that the inner profile of the stationary tool head is an internal tappet, a square socket, a hexagon socket or the like. Universal key according to claim 5, character- ized in that the outer profile of the stationary tool head is an external striking, an external square, an external hexagon, a double-bit profile or the like. Universal key according to claim 12, characterized in that the inner profile of the seated on the stationary tool head outer sliding sleeve is adapted to the outer profile of the stationary tool head. Universal key according to claim 13, character- ized in that the outer sliding sleeve (16) at its active, serving as an additional tool head end has two mutually offset by 90 ° Innenvierkantprofile (inner profile 20) of different sizes. Universal key according to one of claims 1 to 14, characterized in that four key arms (3, 4, 5, 6) are provided in the manner of a cross key.

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