EP2376259B1 - Combination wrench - Google Patents

Description

The invention relates to a head with a mouth and mouth jaw having wrench.

A generic wrench is from the DE 20 2004 003 399 U1 described. The head of the wrench has on a broad side the shape of an open-end wrench. On the other broad side of the head has a three flanks forming angular recess for receiving a corner of a polygonal profile. The diametrically opposite corner region of the polygonal profile is supported on a rounded flank of the head. This broadside allows a ratchet-like use of the wrench.

The US 4,889,020 describes a similar shaped spanner, in which the jaws are also designed so that the wrench can be used ratchet-like.

The US 6,112,625 describes an open ring spanner, which can be placed radially on a threaded shaft, in order to then be placed in the axial direction on a polygonal profile can.

The DE 297 08 596 U1 describes a wrench with V-shaped mutually extending toothed jaws, so that this pair of jaws can be applied to corner areas of polygonal profiles of different key widths.

From the US 3,604,106 is an open ring key similar to DIN 898 known. It has a radial opening for insertion of a shank of a screw whose hexagonal head can be rotated by a multi-jaw assembly.

In the corner regions of the polygonal jaw assembly are stop balls, which lie for the axial retention of the inner opening against an end face portion of the polygonal profile of the screw head.

In the US 5,782,148 a socket is described for plugging onto a screw head having the shape of a hexagonal profile. The inner profile of this also called nut screwing tool has two superposed profile planes in the axial direction. The adjacent profile plane of the opening has a twelve-fold symmetry and a total of twelve angular recesses, which correspond to the total of six hexagonal corners of the hexagonal profile of the screw head. If a screw head is inserted into the screw opening, then every second angular recess is filled with a hexagonal corner. The second profile plane, which lies away from the opening, has only a sixfold symmetry, namely the inner contour of a hexagon. This hexagon profile is formed by elongated angular recesses. Consequently, shorter angular recesses, which are closed at the ends, lie between these elongated angular recesses. These, the Winkelaussparungen closing material sections form third edges, which act as stops for end face portions of the hex profiles when its hexagonal corners are inserted into the short angular recesses. The hexagonal profile of the screw head can thus be inserted into two different angular positions by 30 ° in the opening of the nut. It dives more or less deeply into the nut.

A similar jaw arrangement, but on a ring spanner, describes the EP 1003 627 B1 in which, depending on the angular position of the hexagonal profile of the screw head is either in a stop position or can be inserted through the jaw opening therethrough.

The US 7,340,983 B2 describes a ratchet wrench with an internal polygonal profile, which consists of two adjacent in the axial direction different profile sections. A first profile section has a twelve-fold symmetry. Another is a six-fold symmetry, so that in a first angular position a nut abuts against stops and in a second angular position, the nut can be pushed through the key opening.

The invention has for its object to expand the range of applications of a generic wrench.

The object is achieved by the invention defined in claim 1, wherein two each three edges forming angular recesses are diametrically opposed so that diametrically opposite corner regions of the polygonal profile are radially tied up in the inner opening. It is thus envisaged that the mouth opening as an open-end wrench opening for torque-transmitting attack on the polygonal profile has two opposing mouth jaws, which extend over only one broad side over the corner regions of the multi-jaw assembly. The mouth jaws are designed as parallel jaws and can be based on a hexagonal profile. But they can also be sections of a twelve-edged profile, which is offset from the multi-jaw profile. The mouth opening has a width that corresponds to the key size of the hexagonal profile, ie the distance between the two parallel jaws. As a result of this opening, it is possible to postpone the parallel jaws in the radial direction to the axis of rotation of the hexagonal profile on the hexagonal surfaces of the polygonal profile. According to this embodiment, a novel jaw-ring key is given. If the parallel jaws are used as Drehmomenteinbringzonen, the tool can be used as a known open-end wrench. However, it is also possible, the wrench in an angular position rotated by 30 ° in the axial direction on the screw head or the nut. Then the Mehrkanteckbereiche the polygonal profile are applied to the cheek profile sections, each forming one, preferably two flanks. Then the tool is used as a known open ring spanner, now no stop balls must be provided. The attacks are rather formed by sections of the parallel jaws. The preferred two flanks of the cheek profile sections form an angular recess. A third flank of this angular recess in each case forms the stops for the end face sections of the hexagonal profile, so that the wrench is tied in an axial direction. At the same time it is ensured that the key can not slip in the radial direction, since diametrically opposite corner regions of the screw head einliegen in diametrically opposed angular recesses. The screw head finds a radially tied up receptacle in the mouth. The angular recesses are formed by a total of three flanks, with two flanks forming torque introduction zones which are at an angle of 120 ° to one another. The third flank, which performs the stop function, is at right angles to these two flanks. In a further development of the invention, it is provided that the third flank, the stop is formed from the back of a steel plate is formed. It is preferably a steel plate made of a hardened steel. The material hardness of the steel plate is greater than the material hardness of the steel body, which forms the head of the key. The hardness of the steel plate may be 50 HRC or more. It can be between 50 and 60 HRC. The steel hardness of the steel body is preferably in the range between 35 and 49 HRC. The steel plate simultaneously forms the parallel jaws and is firmly connected to the broad side of a arranged at the end of a drive arm head having a mouth opening. In a preferred embodiment of the invention, the parallel jaws go to form a 120 ° angle in the back of the mouth, so in an area of the mouth opposite the opening, in other jaws, which also in a torque-transmitting system to the hexagonal surfaces of Screw head can occur. These two other jaws are also assigned Eckaussparungen locally. In this case, the torque-transmitting flanks of these corner recesses are aligned with the torque-transmitting flanks of the parallel jaws locally associated angle jaws. As a result, the screw head is in a first angular position with four corner regions in a total of four angular recesses and is not only rotationally fixed, but also firmly held in the mouth in the radial direction and in an axial direction. In the second, opposite the first rotated by 30 ° angular position are four hexagonal surfaces corresponding to them jaws, which are formed by the steel plate. The connection of the steel plate to the steel base body can be positive, positive or cohesive, so in particular by gluing, welding, pinning or screwing done. However, it is advantageous if the connection to the steel base body is chosen such that the steel plate can be replaced. The latter preferably extends in its width over half the material thickness of the steel body. The wrench according to the invention thus has two in the axial direction relative to the direction of rotation of the nut or the screw directly adjacent Torque injection zones, one of which is based on a twelve-ring open key profile and the other on an open-end wrench profile. Instead of the twelve-channel ring key profile, however, a 24-edge profile can also be used as a basis. The two Drehmomenteinbringzonen lie one above the other in the axial direction, that in the Drehmomenteinbringzone, which is made on the basis of an (open) Zwökkantprofiles (or a 24-edge profile) of a ring wrench used nut abuts with two diametrically opposite corner regions of the end face of attacks , The nut inserted in this torque introduction zone is thus tied up in the radial direction and in the axial direction. If the nut or the screw head is inserted into the torque insertion zone equipped on the basis of an open-end wrench profile, then the key can be placed on the hexagonal profile of the screw head or the nut in the radial direction and also in the axial direction. The introduction of the torque then takes place essentially over the steel plate. Since she is hardened, the key of the key does not bend. The jaw portions of the other Drehmomenteinbringzone can also rest in this operating position to transmit torque to the polygonal surfaces of the hexagonal profile. The opposite sides of the mouth flanks of the steel plate can taper at an angle of 120 ° V-shaped. These two, V-shaped converging cheeks can be pre-offset in the direction of the mouth opening, so that the back of the steel plate in the region of these rear jaws forms an abutment against which two complete edge portions of the end face of the screw head can strike. In one embodiment of the invention, it is provided that the two parallel jaws associated flanks of the multi-jaw assembly of the steel body pass into arc sections. These arc sections then pass into a transverse jaw of the steel base body, on which an edge region of the polygonal profile can rest. As already stated above, the mouth jaws can also be sections of a twelve-edged profile. The mutually parallel, the mouth opening ausbildenden Baking is then interrupted by twelve-sided jaw sections. In this embodiment, the multi-jaw assembly based on a 24-edge profile, so that the twelve-sided jaws form attacks. Such a trained key can be used as open-end wrench, as a ring key with stop and as a ring key without stop.

Fig. 1

in perspektivischer Darstellung den Kopf eines Maulschlüssels in einer ersten Blickrichtung mit teilweise weggebrochenem Antriebsarm,

Fig. 2

eine Darstellung gemäß Fig.1, jedoch mit um 180° gewendetem Werkzeug,

Fig. 3

eine Draufsicht auf das in Fig.1 dargestellte Werkzeug,

Fig. 4

die Rückansicht des Werkzeuges,

Fig. 5

einen Schnitt gemäß der Linie V - V in Fig. 3,

Fig. 6

einen Schnitt gemäß der Linie VI - VI in Fig. 3,

Fig. 7

den Schraubenschlüssel in einer Darstellung gemäß Fig. 4 mit im Maul in einer ersten Drehstellung steckenden Schraubenkopf,

Fig. 8

eine perspektivische Rückansicht dazu,

Fig. 9

den Schraubenschlüssel in der in Fig. 3 dargestellten Stellung mit teilweise auf die Sechskantflächen eines Schraubenkopfes aufgeschobenem Maul,

Fig. 10

eine Folgedarstellung zu Fig. 9, mit vollständig ins Maul eingeschobenem Sechskantprofil,

Fig. 11

eine Darstellung gemäß Fig. 8 in der zweiten Winkelstellung,

Fig. 12

eine Darstellung gemäß Fig. 2 eines zweiten Ausführungsbeispiels,

Fig. 13

eine Darstellung gemäß Fig. 3 eines dritten Ausführungsbeispiels,

Fig. 14

eine Darstellung gemäß Fig. 1 des dritten Ausführungsbeispiels,

Fig. 15

eine Darstellung eines vierten Ausführungsbeispiels in einer Darstellung gemäß Fig. 3,

Fig. 16

eine erste perspektivische Darstellung eines fünften Ausführungsbeispiels,

Fig. 17

eine zweite perspektivische Darstellung des fünften Ausführungsbeispiels,

Fig. 18

eine erste perspektivische Darstellung eines sechsten Ausführungsbeispiels,

Fig. 19

eine zweite perspektivische Darstellung des sechsten Ausführungsbeispiels,

Fig. 20

eine erste perspektivische Darstellung eines siebten Ausführungsbeispiels,

Fig. 21

eine zweite perspektivische Darstellung des siebten Ausführungsbeispiels,

Fig. 22

eine erste perspektivische Darstellung eines achten Ausführungsbeispiels,

Fig. 23

eine zweite perspektivische Darstellung des achten Ausführungsbeispiels,

Fig. 24

eine erste perspektivische Darstellung eines neunten Ausführungsbeispiels,

Fig. 25

eine zweite perspektivische Darstellung des neunten Ausführungsbeispiels,

Fig. 26

eine erste perspektivische Darstellung eines zehnten Ausführungsbeispiels,

Fig. 27

eine zweite perspektivische Darstellung des zehnten Ausführungsbeispiels,

Fig. 28

ein elftes Ausführungsbeispiel in der Draufsicht,

Fig. 29

das elfte Ausführungsbeispiel in der Seitenansicht, teilweise geschnitten entlang der Linie XXIX-XXDC in Fig. 28 und

Fig. 30

vergrößert den Ausschnitt XXX-XXX in Fig. 29.

Embodiments of the invention are explained below with reference to accompanying drawings. Show it:

Fig. 1

in a perspective view the head of an open-end wrench in a first viewing direction with partially broken drive arm,

Fig. 2

a representation according to Fig.1 , but with 180 ° turned tool,

Fig. 3

a top view of the in Fig.1 illustrated tool,

Fig. 4

the rear view of the tool,

Fig. 5

a section along the line V - V in Fig. 3 .

Fig. 6

a section along the line VI - VI in Fig. 3 .

Fig. 7

the wrench in a representation according to Fig. 4 with screw head stuck in the mouth in a first rotational position,

Fig. 8

a perspective rear view thereto,

Fig. 9

the wrench in the in Fig. 3 shown position with partially pushed onto the hexagonal surfaces of a screw head mouth,

Fig. 10

a follow-up presentation to Fig. 9 with hexagon profile fully inserted into the mouth,

Fig. 11

a representation according to Fig. 8 in the second angular position,

Fig. 12

a representation according to Fig. 2 a second embodiment,

Fig. 13

a representation according to Fig. 3 a third embodiment,

Fig. 14

a representation according to Fig. 1 of the third embodiment,

Fig. 15

an illustration of a fourth embodiment in a representation according to Fig. 3 .

Fig. 16

a first perspective view of a fifth embodiment,

Fig. 17

a second perspective view of the fifth embodiment,

Fig. 18

a first perspective view of a sixth embodiment,

Fig. 19

a second perspective view of the sixth embodiment,

Fig. 20

a first perspective view of a seventh embodiment,

Fig. 21

a second perspective view of the seventh embodiment,

Fig. 22

a first perspective view of an eighth embodiment,

Fig. 23

a second perspective view of the eighth embodiment,

Fig. 24

a first perspective view of a ninth embodiment,

Fig. 25

a second perspective view of the ninth embodiment,

Fig. 26

a first perspective view of a tenth embodiment,

Fig. 27

a second perspective view of the tenth embodiment,

Fig. 28

an eleventh embodiment in plan view,

Fig. 29

the eleventh embodiment in side view, partially in section along the line XXIX-XXDC in Fig. 28 and

Fig. 30

enlarges the section XXX-XXX in Fig. 29 ,

The tool shown in the drawings consists of a steel base body, which has a head 1 and a drive unit 2 connected to the same material. The drive arm 2 is shown only partially for purposes of illustration. One of the two broad sides of the consisting of a flat material head 1 is provided with a profiled steel plate 12. While the steel body can be forged from a steel having a hardness of 39 to 49 HRC, the steel plate 12 is a hardened plate. The profile opening may e.g. be generated by punching or spaces. The steel plate shown in the drawings has a running on a circular arc outline contour and is located in a broad side recess of the head 1 a. But the steel plate can also have a different outline contour, for example, to be positively secured against rotation. It is conceivable to connect the steel plate with screws to the steel base body, to weld or bond the steel plate 12 to the steel base body.

The recess 3 of the steel plate 12 has the shape of a partial section of an equilateral hexagon, wherein the distance between two opposing marginal edges 7 defines the key dimension of the tool. The arranged between the parallel jaws 7 opening 3 forms a mouth, which is open to one side. The opening 3 'has substantially at least the width of the key dimension, ie the distance between the two parallel jaws 7.

The steel base body 1 has aligned with the parallel jaws 7 extending jaw portions 7 '. In the corner points 11, which are preferably designed to prevent notch stresses as rounding, the parallel jaws 7 go into jaws 10, which in the muzzle hexagonal profile 13 as well as the parallel jaws 7 in surface contact with the hexagonal surfaces 14 of Screw head 13 can occur. The hexagonal corners 15 of the screw head 13 are then in the region of the corners eleventh

In this, in the Fig. 10 shown angular position are also to the parallel jaws 7 aligned jaws 7 'of the steel body to the hexagonal surfaces 14 of the screw head 13 at. The same applies to the aligned with the jaws 10 jaw portions 10 'of the steel body.

Approximately in the middle between the corner 11 and the opening 3 'of the mouth 3 is between two approximately equal jaw portions 7' an angular recess. This is formed by two flanks 5, which meet in a crest line 6, and another flank 4, which is formed from the underside of the steel plate 12. Each of the two diametrically opposed parallel jaws 7 is associated with such an angular recess.

The two jaws 10 each extending at an angle of 120 ° to the parallel jaws are also assigned an angular recess flanked by jaw sections 10 'in the center of the steel base body. Each of the two angular recesses is first formed by two at an angle of 120 ° in a crest line 9 hitting flanks 8, which form 5 as well as the flanks 5 Drehmomenteinbringzonen. A third flank is also formed here from the back of the steel plate 12. This flank 4 ', like the flank 4, forms a stop for a broadside section 16 of the end face of the screw head 13.

Like from the Fig. 3 shows, a rear edge 5 is aligned with a flank 8. The flanks 5 and 8 of the angular recesses are in the region of the corners of an equilateral hexagon with a side distance corresponding to the distance of the parallel jaws 7.

That in the Fig. 12 illustrated second embodiment differs from the first embodiment essentially in that the steel plate 12 extends over approximately half the material thickness of the key head 1. In addition, in this embodiment, the steel plate 12 is used interchangeably in a broad side recess of the head 1. The attachment is made with screws, not shown, which produce a connection between the steel base body and steel plate 12 of one of the two broad sides. Preferably, the steel plate is located in a recess of the key head. But it is also conceivable that the steel plate extends over the entire broad side surface of the steel body. In this case, the material thickness of the steel base body is preferably the same as the material thickness of the steel plate 12.

The material thickness of the steel plate 12 may also be selected so that the axial width of the parallel jaws 7 is greater than the axial width of the multi-jaw assembly 5, 8. Similarly, the steel plate 12 may be designed so that the axial width of the parallel jaws 7 is less than the axial width of the multi-jaw assembly 5, 8th

The key according to the invention has two torque introduction zones arranged side by side in the axial direction, wherein the first torque introduction zone, which is formed by the multi-jaw arrangement 5, 8, is manufactured on the basis of a dodecagonal ring key profile. The ring spanner profile is provided with an annular opening, which is, however, larger than in a DINgemäßen open ring spanner. The mouth has a width that corresponds to the width of an open-end wrench. The second torque application zone is formed by a wrench profile. Both Drehmomenteinbringzonen lie one above the other in such a way that the two opposite parallel jaws of the open-end wrench form stops for front side sections of the hexagonal profile of a nut or a screw head.

In the in the Figures 13 and 14 illustrated third embodiment, the two of the jaw opening 3 'opposite, V-shaped converging cheeks are less spaced from the opening 3', as it is in the in Fig. 3 illustrated first embodiment of the case. This has the consequence that even in an operating position, in which two opposite broad sides of the screw head lie flat against the parallel jaws 7 and 7 ', two edge regions of the end faces of steps 4 ", which are formed from the back of the steel plate 12, In an operating mode in which the corner regions of the screw head 13 are inserted in the angle jaws 5, 6, larger end face portions of the screw head are covered than is the case with the first embodiment., In addition, the steps 4 'also form stops to which an end portion of the screw head abuts when the polygonal sides of the screw head abut the parallel jaws 7 area.

At the in Fig. 15 illustrated fourth embodiment, go the flanks 5 of the multi-jaw assembly of the steel body in a crest area 6 in each case in an arc section 17. The two arcuate portions 17 merge in the vertices 9 in a rear jaw 8, which extends substantially transversely to the direction of extension of the two parallel jaws 7.

Dash-dotted in this embodiment, a screw head 13 is shown, which rests with two diametrically opposite corner regions on the flanks 5 of the steel body. Since the two flanks 5 spaced apart from one another by the wrench size lie on lines which intersect in front of the mouth opening 3 ', these flanks 5 form radial retaining flanks. In opposition to the flanks 5, the transverse flank 8 formed in front of the base of the steel base body runs.

Knit double punctured is in the Fig. 15 a screw head 13 is shown, which rests with two facing away from each other wide side surfaces of the parallel jaws 7 of the steel plate 12. An edge of the screw head 13 pointing towards the base of the base abuts centrally on the transverse flank 8. The shape of the steel base plate 12 substantially corresponds to that of the first embodiment.

Furthermore, it can be provided that the base of the polygonal jaw arrangement is a 24-edge profile. Furthermore, the polygonal jaws 5, 8 and the parallel jaws 7, 7 'do not have to be rectilinear. These jaws 5, 8, 7, 7 'can also lie on curved lines with a large radius of curvature. Both superimposed in the axial direction of the jaw profiles may be formed by a series of arcuate sections.

Furthermore, the parallel jaws 7 may be formed rough. They can be ribbed. They may be provided with a diamond coating or other friction coating. The jaws 7 can also be toothed beyond.

• Eine Mutter, wie sie in der Fig. 8 dargestellt ist, besitzt eine Achse, um welche sie gedreht werden kann. Diese Mutter kann in zwei verschiedenen, um 30° zueinander versetzten Winkelstellungen mit dem Werkzeug zusammenwirken. In einer ersten Winkelstellung, die in den Figuren 7 und 8 dargestellt ist, muss die Mutter 13 in Axialrichtung von der der Stahlplatte 12 abgewandten Seite zwischen die Backen 5, 8 des Maules 3 eingesteckt werden. Dabei liegen insgesamt vier Eckbereiche 15 des Sechskantprofils 13 in den von den Flanken 5 bzw. 8 gebildeten Eckaussparungen. Die Ecken 15 des Sechskantprofils 13 korrespondieren dann mit den Scheiteln 6, 9 der Winkelaussparungen.

The functionality of the tool is the following:

• A mother, as in the Fig. 8 has an axis about which it can be rotated. This nut can interact with the tool in two different, offset by 30 ° angular positions. In a first angular position, in the FIGS. 7 and 8th is shown, the nut 13 must be inserted in the axial direction of the steel plate 12 side facing away between the jaws 5, 8 of the mouth 3. In this case, there are a total of four corner regions 15 of the hexagonal profile 13 in the corner recesses formed by the flanks 5 and 8 respectively. The corners 15 of the hexagonal profile 13 then correspond to the apexes 6, 9 of the angular recesses.

The axial insertion of the nut in the mouth 3 of the key or the axial placement of the mouth 3 on the nut 13 is limited stop. As a stop serve the bottom portions 4, 4 'of the steel plate 12, which - like the Fig. 7 shows - rest on broadside sections 16.

In a second mode of operation of the tool can be the mouth 3 - as in the Fig. 9 shown - in the radial direction relative to the axis of rotation of the nut 13 on the hexagonal surfaces 14 of the mother postpone. In this case, not only the parallel jaws 7, but also the aligned running jaw portions 7 'slide along the hexagonal surfaces 14 of the nut 13 until the in Fig. 10 shown end position is reached, abut in the total of four hexagonal surfaces 14 on corresponding jaws 7,10 and 7 ', 10'.

In another embodiment, not shown, the further jaws 10 or the pairs of angle jaws 8 are missing. The section opposite the opening 3 'of the mouth 3, ie the foot of the mouth, runs on a circular arc line through the points 9 and 11 shown in the drawings.

In the in the Figures 16 and 17 illustrated fifth embodiment, the spanner of the steel plate 12 has the outline contour of a Zwölfkantes. The jaws also run here as mutually parallel jaws 7. The mutually parallel jaws 7 are interrupted in the middle. There they form two opposite angular openings, which are formed by two twelve-sided jaws 18. The sections 10 of a hexagonal profile extending in the base of the base are also interrupted centrally by jaws 19 of a twelve-edged profile.

The axially offset to the wrench profile arranged multi-jaw profile has the outline contour of a 24-Kant in this embodiment.

The angle jaws 5 provided with stops 4 are in this embodiment adjacent to 24-jaw jaws 20, which are aligned with the twelve-jaw jaws of the wrench profile 18 and 19 respectively. In this embodiment, a screw head can be inserted radially into the mouth 3 '. The wrench can also be placed radially in a 30 ° -Zersetztstellung to a nut or a screw head, wherein the Mehrkantecken the screw head profile in the angle sections 19, 18 and 20 occur. In this Umgriff the stops 4 are not in function. The stops 4 then fulfill their stop function when the screw head or the nut is inserted radially in a 15 ° -setzt position in the multi-jaw assembly 5.6.

In the in the Figures 18 and 19 6 illustrated embodiment, in turn, the spanner profile has a hexagonal profile, consisting of two mutually parallel parallel jaws 7 and adjoining it in a 120 ° angle jaws 10. The multi-jaw assembly 5, 6 is based in this embodiment on a 24-edge profile. The additional jaws are designated by the reference numeral 20. The 24-Kantbacken 20 are flanks of an angular recess, the third edge of the stop 4 is formed. There are thus three each offset by 15 ° lying angular positions of a screw head profile possible, in which a front side portion is supported on the stop surface 4.

In the in the Figures 20 and 21 illustrated seventh embodiment are between the jaws 5 and 8 of the multi-jaw assembly arc sections 17th

That in the Figures 22 and 23 eighth embodiment shown differs from that in the Figures 20 and 21 illustrated seventh embodiment substantially in that the arcuate sections until the Vertex 6 extend so that the stop 4 surface merges into the stop 4 '.

In the in the Figures 24 and 25 illustrated ninth embodiment, the jaws 5, 8 and 10 'are rounded. The jaws do not run on straight lines, but along curves. The vertices 6, 9 are formed by radii. Baking and vertexes are formed here by bulges.

In the in the Figures 26 and 27 illustrated tenth embodiment, in addition to the ninth embodiment, the apex 11 between the jaws 7 and 10 of the steel plate 12 rounded. The jaws 7,10 may also extend on curved lines with a large radius.

In the in the Fig. 28 to 30 illustrated eleventh embodiment, the middle handle portion of the drive arm 2 has a profiled bulge. Near the head 1 is a thumb grip 21, in which the key width is imprinted. Within the thumb grip 21 are also more material protrusions to improve the feel.

The steel plate 21 is fastened with a screw 23 on the head 1, wherein the screw 23 inserted into a countersunk screw mounting hole 22 of the steel plate 12 and is screwed into an internal thread of a mounting hole 24 of the head. The steel plate 12 is also here in a broad side recess of the head. Compared to the previous embodiments, the steel plate 12 has only a different plan. The outer edge of the steel plate 12 has two substantially rectilinear edge portions 12 ', which are substantially perpendicular to each other and merge into each other to form a rounded apex. In the area of this Vertex is the mounting hole 22 which is penetrated by the mounting screw 23.

On the opposite side of the jaw 3, the arm 1 carries a ratchet mechanism with a plurality of jaws forming annular opening having the same width across the tongue, as the mouth 3. With a pivot lever, the freewheeling direction of the locking mechanism can be switched.

LIST OF REFERENCE NUMBERS

1

head

2

drive arm

3

opening

4

attack

5

angle baking

6

vertex

7

parallel jaw

8th

angular jaw

9

vertex

10

jaw

11

vertex

12

steel plate

13

screw head

14

Hexagonal surface

15

Allen Corner

16

Broadside section

17

arc section

18

Bihexagonal jaws

19

Bihexagonal jaws

20

Twenty-four rectangular beaks

21

vertex

22

Screw fastening opening

23

screw

24

mounting hole

Claims (15)

1. A wrench comprising a head (1) having a mouth (3) and jaw cheeks, the wrench having two torque-introducing zones which are disposed adjacent to one another in an axial direction with respect to the direction of rotation of a nut or bolt, each zone having a radial mouth opening (3'), and the first torque-introducing zone having parallel jaw portions (7') that run parallel to one another for torque-transmitting engagement on the polygon faces of a polygonal profile of a nut or a bolt head, and having a multi-point configuration (5, 8) which has two angular notches (4, 5, 6; 8, 4', 9), each of which has three flanks, two flanks in each case forming a corner (6) for torque-transmitting partially-surrounding engagement on the same polygonal profile (13), and a third flank forming a stop (4) for an end face portion (16) of the polygonal profile (13), and the angular notches (4, 5, 6; 8, 4', 9) being located diametrically opposite one another in such a manner that diametrically opposite corners of the polygonal profile (13) are radially secured in the mouth (3), and the second torque-introducing zone having a wrench-mouth profile with parallel jaws (7) for torque-transmitting engagement on the polygon faces of the same polygonal profile of the nut or the bolt head.
2. A wrench according to Claim 1, characterized in that the stops (4) are formed by the parallel jaws (7).
3. A wrench according to either of the preceding claims, characterized in that the third flank (4, 4') of the angular notch (4, 5, 6; 8, 4' , 9) is defined by a steel plate (12) that forms at least partial regions of the parallel jaws (7), the steel plate being fixedly connected to a wide face of a head (1) that is located at the end of an actuating arm (2) and provides the multi-point configuration (5, 8).
4. A wrench according to Claim 3, characterized in that the material of the steel plate is a hardened steel of in particular a hardness of 50 HRC or more, the hardness of the material of the base body that forms the head (1) and the actuating arm (2) being less and being in particular 35 to 49 HRC.
5. A wrench according to any of the preceding claims, characterized in that the polygonal profile (13) is a hexagonal profile and the mouth (3) defines, in the region of the base of the mouth, further surfaces (8) of the multi-point configuration (5, 8), in particular in the form of angled surfaces (8), each of which is located approximately midway along further cheeks (10) that run inclined at an angle of 120° with respect to the parallel jaws (7), the further cheeks (10) forming respective third flanks (4') as stop for a portion (16) of an end face of the hexagonal profile (13).
6. A wrench according to any of the preceding claims, characterized in that the parallel jaw portions (7'), which are formed by the steel base body defining the head (1), run inclined at an angle of 30° with respect to flanks (5) of the angular notches.
7. A wrench according to any of Claims 3 to 6, characterized in that the steel plate (12) is set into a recess in the wide face of the head (1).
8. A wrench according to any of Claims 3 to 7, characterized in that the steel plate (12) is connected to the head (1) by way of a force fit, by a positive connection, or by bonding, for example a push fit, a screw connection, a riveted connection, an adhesive bond, or welding.
9. A wrench according to any of Claims 3 to 8, characterized in that the steel plate (12) is interchangeably associated with the wide face of the head (1).
10. A wrench according to any of Claims 3 to 9, characterized in that the steel plate (12) has a material thickness that equates to approximately one-half of the thickness of the material of the head (1).
11. A wrench according to any of Claims 5 to 10, characterized in that the two cheeks (10) that are located opposite the jaw opening (3') form a stop step (4") for contact with substantially an entire edge portion of an end face of a polygonal profile (13).
12. A wrench according to any of the preceding claims, characterized in that the wall of the multi-point configuration (5, 8) that is located opposite the jaw opening (3') forms a contact edge surface (8), the contact edge surface running substantially at right angles to the direction of extent of the parallel jaws (7) and making contact with substantially a complete polygon face of the polygonal profile (13).
13. A wrench according to Claim 12, characterized in that the rearward face (8) of the steel base body that extends substantially at right angles to the extent of the parallel jaws (7), merges into arcuate portions (17), the arcuate portions (17) merging into flanks (5) of the multi-point configuration that are located in the region of the parallel jaws (7).
14. A wrench according to any of the preceding claims, characterized in that the parallel jaws (7) and/or the surfaces of the multi-point configuration (5, 8) are provided with a roughened configuration to increase their gripping capability and are in particular fluted, provided with a coating of frictional material, or toothed.
15. A wrench according to any of the preceding claims, characterized in that the jaw cheeks (7) are interrupted by surfaces (18) of a 12-sided polygon.

Images