EP3159107A1 - Group of hand pliers - Google Patents

Abstract

The invention relates to hand tools of different types and / or geometries. According to the hand tongs are modular. In this case, a basic module (41) can be combined with different pliers head modules (38a, 38b, 38c) without constructive adjustments. Due to the modular design according to the invention, the manufacturing costs can be reduced and can be achieved in the production of hand tools of different types, a high common mode component.

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a group with different hand tools, which in the nature of the machining of a workpiece, the geometry of the workpiece to be machined, the geometry of the hand tools u. Ä. Can differentiate. The hand tools are preferably cutting tongs, by means of which workpieces such as, for example, cables can be severed. In this case, different hand tools are, for example, intended for different diameters and / or hardness of the cable to be severed. It is also possible that the different hand tools have different cutting jaws, in particular on the one hand scissor-like open cutting jaws and on the other hand closed in the circumferential direction cutting jaws.

OBJECT OF THE INVENTION

The object of the invention is to simplify the production of different hand tools.

SOLUTION

The object of the invention is achieved with the features of independent claim 1. Further preferred embodiments according to the invention can be found in the dependent claims.

DESCRIPTION OF THE INVENTION

The invention relates to a group of hand tongs. This group of hand tongs includes a first subgroup with hand tongs, eg hand tongs of type A, and a second subgroup with hand tongs, eg hand tongs of type B. The hand tongs of the first subgroup and the second subgroup (thus for the example the hand tongs of the types A and B) are designed and intended for machining different workpieces.

According to the invention, a modular design of the forceps of the two subgroups is proposed. In this case, a hand tool with two, three or more modules may be formed. The individual modules of the hand tools can be manufactured in large quantities at low cost, in which case a specification of the hand tools for the subgroups (ie for the example of the training of the type A or B) can be done by combining different modules.

According to the invention, the hand tools of the subgroups have at least identically designed gear modules, whereby the DC component can be increased. In this case, the identical design of the transmission modules, the identical design of the individual component of the transmission module, the provision of identical interfaces of the transmission module with the other modules, equal dimensions of the transmission module, same locations and configurations for holding means of the transmission module (eg., Places and diameters of holes of a housing plate the gear module for holding bolts, pivot pins, spacers, etc.).

In a further embodiment of the invention, the identically designed gear modules of the hand tools of the two subgroups have identical interfaces for connecting the gear module with identically designed counter-interfaces of different pliers head modules (for example, a pliers head module type A and a pliers head module type B) for the formation of the forceps first subgroup (hand pliers type A) on the one hand and the formation of hand tools of the second subgroup (type B) on the other. Independently of the unified interfaces of the gear modules, the gear module can be manufactured uniformly with which pliers head module is to be assembled later.

Alternatively or cumulatively, the transmission modules can have identical interfaces for the connection of the transmission module with counter-interfaces of different hand lever modules, with which then the formation of the manual tongs of the different subgroups can take place. Thus, an individualization of the hand tools when using the same transmission module by using different hand lever modules is possible.

In principle, the transmission modules can be designed as desired. For a proposal of the invention, the gear modules each have a housing plate. On the housing plate pivot pins are then held, via which further components of the hand tool, in particular components of the transmission module, can be mounted pivotably on the housing plate. Alternatively or additionally, moving gear elements of the gear module, for example a moving hand lever part, a thrust lever and / or a detent lever, may be mounted directly or indirectly on the housing plate during actuation of the hand tools. Preferably, all components of the housing module are held or mounted on the housing plate. Preferably, the components of the housing module extend as far as possible or all on one side of the housing plate. It is possible that pivot pin, bearing bolts, spacers u. Ä. In an end region thereof are mounted in the housing plate or held on this, said components are additionally held or mounted in the other end region for a particular embodiment of the invention in addition to a housing plate of the pliers head module.

In a further embodiment of this solution, the transmission module has an opening. Through this opening pivot pin for supporting movable transmission elements of the transmission module and / or during operation of the hand tools moving gear elements of the transmission module for disassembled pliers head module are accessible. In extreme cases, a cover of the pivot pin and the gear elements for disassembled pliers head module exclusively on one side by the housing plate of the gear module, while these are otherwise freely accessible, so that the opening is everywhere where the housing plate does not extend. This opening is at least partially closed with mounted pliers head module by a housing plate of the pliers head module in the direction transverse to a pliers head plane. It is possible, for example, that extend in this partially closed state of the opening, the pivot pin and the transmission elements of the transmission module between the housing plate of the transmission module and the housing plate of the pliers head module.

For a further group of hand tools according to the invention, at least one gear element moved during the actuation of the hand tools and / or a movable hand lever are rotatably mounted both with respect to the housing plate of the pliers head module and with respect to the housing plate of the gear module. To name just an example, the rotatable mounting can take place in that a bearing pin supporting the gear element or the movable hand lever receives its end portions in the two mentioned housing plates, so that the housing plates have aligned bores. The connection between a bearing pin and a bore of the housing plate can by pressing, caulking, rotatable bearing bspw. Via a plain bearing, a arranged on the outside of the housing plate locking ring u. Ä.

It is quite possible that the housing plates of the gear modules are formed separately from a fixed hand lever or a hand lever plate of a fixed hand lever, which then the hand lever or the hand lever plate are not part of the transmission module, but rather form another module or are part of another module, which is mounted with the gear module. For an inventive embodiment but the housing plates of the gear modules are integrally formed with a hand lever or a hand lever plate, whereby the production is further simplified and a joining or mounting location between the housing plate and the hand lever plate can be avoided.

It is entirely possible that the housing plate on the one hand and the hand lever plate on the other hand are flat. In a preferred embodiment of the invention, however, the housing plate goes over a crank in the hand lever or the hand lever plate. In this case, the offset is preferably approximately half (in particular ± 20% or ± 10% or ± 5% of the half) of the distance of the housing plates of the gear module and the pliers head module in the assembled state. For such dimensioning of the crank over the offset can be compensated to the extent that the housing plates the pliers head in the transmission limited in a direction transverse to the pliers head plane, while at the same time due to the crank the hand lever plate can be arranged in a central pliers head plane, which approximately midway between the two housing plates can be arranged and extends approximately centrally through a handle.

The production of the individual components of the hand tools can be arbitrary. Thus, for example, a base body, which has a fixed cutting jaw and a housing plate of the pliers head module be formed in a fine injection molding process. For a particular proposal of the invention, at least one hand lever and / or the housing plate of the gear module is punched from a sheet, whereby a further reduction of the manufacturing cost can be carried out.

There are also many possibilities for the types of manual tongs in the individual subgroups. For a particular inventive solution, hand tongs of the first subgroup have a pincer head module with scissor-like open cutting jaws, while hand tongs of the second subgroup have a pincer head module with cutting jaws closed in the circumferential direction.

For the design of the kinematics of between the hand lever on the one hand and the cutting jaws on the other intermediate gearbox, there are many possibilities with any gear connections and resulting swing directions of the components involved. For a proposal according to the invention in the hand tools, the pivoting direction of a movable hand lever is oriented opposite to the pivoting direction of an associated movable cutting jaw, so that, for example. The movable hand lever is pivoted during the closure in a clockwise direction, while the associated movable cutting jaw is pivoted counterclockwise.

Also with regard to the arrangement of the bearing for a thrust lever, there are many possibilities. For such a possibility, the pivot bearing for the storage of the thrust lever is arranged on the movable hand lever. In this case, the movable hand lever between this pivot bearing and a handle of the hand lever is pivotally mounted on a housing plate of the transmission module.

For a particular proposal of the invention, the pliers head modules are each formed with a one-piece body, which forms a housing plate and a fixed cutting jaw. For example. the main body is produced in an injection molding process. The transmission module is formed with a housing plate, which can be made in particular by punching a sheet and / or can be integrally formed with a hand lever plate. With successful assembly of the pliers head module with the gear module is at least one pivot pin (preferably both a pivot pin for the pivotable mounting of the movable hand lever and a pivot pin for the pivotal mounting of the Hand levers) in one end region on the housing plate of the main body of the pliers head module and stored in another end portion of the housing plate of the gear module or fixed.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the description are merely exemplary and can take effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Without thereby altering the subject matter of the appended claims, as regards the disclosure of the original application documents and the patent, further features can be found in the drawings, in particular the illustrated geometries and the relative dimensions of several components and their relative arrangement and operative connection. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

The features mentioned in the patent claims and the description are to be understood in terms of their number that exactly this number or a greater number than the said number is present, without requiring an explicit use of the adverb "at least". For example, when talking about an element, it should be understood that there is exactly one element, two elements or more elements. These features may be supplemented by other features or be the only characteristics that make up the product in question.

The reference numerals contained in the claims do not limit the scope of the objects protected by the claims. They are for the sole purpose of making the claims easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

zeigt in einer räumlichen Darstellung eine Handzange mit demontiertem Zangenkopfmodul.

Fig. 2

zeigt in einer Draufsicht auf eine Zangenkopfebene die Handzange gemäß Fig. 1, wobei hier allerdings das Zangenkopfmodul montiert ist und eine Gehäuseplatte mit Kröpfung und eine Handhebelplatte eines Getriebemoduls nicht dargestellt sind.

Fig. 3

zeigt ein Detail III der Handzange gemäß Fig. 2 zu Beginn eines Arbeitshubs.

Fig. 4

zeigt die Handzange in einem Detail gemäß Fig. 3 in einer teilgeschlossenen Stellung während eines ersten Teilarbeitshubs.

Fig. 5

zeigt in einem Detail entsprechend Fig. 3 und 4 die Handzange mit erneuter Öffnung der Handhebel nach einem ersten Teilarbeitshub.

Fig. 6

zeigt in einem Detail entsprechend Fig. 3 bis 5 die Handzange für den Abbruch eines Arbeitshubs mit einer Entlastung des Rasthebels durch Herbeiführung einer geringfügigen Schließbewegung.

Fig. 7

zeigt in einem Detail entsprechend Fig. 3 bis 6 die Handzange für eine manuelle Verschwenkung des Rasthebels außer Eingriff mit einer Verzahnung einer beweglichen Schneidbacke zur Ermöglichung einer Öffnungsbewegung.

Fig. 8

zeigt in einem Detail entsprechend Fig. 3 bis 7 die Handzange in einer zweiten maximalen Öffnungsstellung.

Fig. 9

zeigt eine modulare Gruppe von Handzangen, welche mit demselben Grundmodul und unterschiedlichen Zangenkopfmodulen gebildet werden können.

Fig. 10

zeigt eine Gruppe von Handzangen, welche mit denselben Zangenkopfmodulen und denselben Getriebemodulen, aber unterschiedlichen Handhebelmodulen gebildet werden können.

Fig. 11

zeigt eine weitere Ausführungsform, bei welcher unterschiedliche Handzangen mit denselben Zangenkopfmodulen und denselben Getriebemodulen, aber unterschiedlichen Handhebelmodulen gebildet werden können.

In the following the invention will be further explained and described with reference to preferred embodiments shown in the figures.

Fig. 1

shows in a spatial representation a hand tool with disassembled pliers head module.

Fig. 2

shows in a plan view of a pliers head plane according to the pliers Fig. 1 , wherein here, however, the pliers head module is mounted and a housing plate with offset and a hand lever plate of a gear module are not shown.

Fig. 3

shows a detail III of the pliers according to Fig. 2 at the beginning of a working stroke.

Fig. 4

shows the hand tool in a detail according to Fig. 3 in a partially closed position during a first partial working stroke.

Fig. 5

shows in a detail accordingly Fig. 3 and 4 the hand pliers with reopening of the hand lever after a first partial working stroke.

Fig. 6

shows in a detail accordingly Fig. 3 to 5 the hand tool for the termination of a working stroke with a discharge of the locking lever by bringing about a slight closing movement.

Fig. 7

shows in a detail accordingly Fig. 3 to 6 the manual pliers for a manual pivoting of the locking lever out of engagement with a toothing of a movable cutting jaw to allow an opening movement.

Fig. 8

shows in a detail accordingly Fig. 3 to 7 the hand tool in a second maximum open position.

Fig. 9

shows a modular group of hand tools that can be formed with the same base module and different pliers head modules.

Fig. 10

shows a group of hand tools which can be formed with the same pliers head modules and the same gear modules, but different hand lever modules.

Fig. 11

shows a further embodiment in which different hand tools with the same pliers head modules and the same gear modules, but different hand lever modules can be formed.

DESCRIPTION OF THE FIGURES

Fig. 1 The hand levers 2, 3 are each formed with an elongate hand lever plate 4, 5, which in each case accessible to the user of the hand tool 1 range of a preferably elastomeric handle. 6 7, whose outer contour and rigidity are optimized for the actuating contact with the user's hand. The plunger head is used by the plane of extension of the housing plate 9. The housing plate 9 serves the pivotable articulation of the movable hand lever 3, the pivotal support of gear elements of the drive gear of the hand tool 1 and the provision of fasteners for a pliers head module.

On the housing plate 9, a pivot pin 10 is held to form a pivot bearing 52, with which the movable hand lever 3 relative to the housing plate 9 and thus the fixed hand lever 2 is pivotally mounted. In addition, an opening spring 11, here a leg of a spiral or leg spring, is supported on the pivot pin 10. The housing plate 9 carries a bolt 12 which extends through a biasing spring 13, here also a spiral or leg spring. Furthermore, the housing plate 9 carries spacers 14, 15 formed with stepped bolts or sleeves. A detent lever 16 is pivotably supported by a pivot pin 17 to form a pivot bearing 53 relative to the housing plate 9, the pivot pin 17 being graduated simultaneously with both sides of the detent lever 16 End regions forms a further spacer 18. A push lever 19 is pivoted about a pivot bearing 20 on the hand lever plate 5, wherein the pivot bearing formed with the pivot pin 10 52 is disposed between the pivot bearing 20 for the articulation of the push lever 19 and the handle 7. For the illustrated embodiment, the pivot bearing 20 is formed with a part-circular section of the hand lever plate 5 with an arc angle slightly greater than 180 °, in which a part-cylindrical end portion of the push lever 19 is pressed or "clipped".

In a pivot bearing 21, which is located between the handle 7 and the pivot pin 10, a locking lever 22 is hinged to the hand lever 3.

The hand lever 3, the locking lever 22, the locking lever 16 and the push lever 19 are pivotable about pivot axes, which are oriented parallel to each other and vertically to the pliers head plane. During such a pivoting movement is at least partially a guide of the transmission elements or the hand lever plate 5, the locking lever 16 and the push lever 19 through the housing plate 9. The opening spring 11 and the biasing spring 13 are subjected to a torsional moment, whose vector is also oriented vertically to the pliers head plane. In the in Fig. 1 shown partially assembled state, the components may be partially or all loosely held on the housing plate 9 or be held captive thereto.

Fig. 2 shows the hand tool 1 in another partially assembled state. Here, only the handle 6 is shown by the fixed hand lever 2, while the hand lever plate 4 and the housing plate 9 are not shown. A movable cutting jaw 23 has an inner, in a rough approximation crescent-shaped or partially spiral-shaped cutting edge 24 and an external toothing 32 along a partial circular arc. The movable cutting jaw 23 is articulated via a formed with a pivot pin 54 pivot bearing 25 on a fixed cutting jaw 26. The fixed cutting jaw 26 is integrally formed with a housing plate 27. In this case, the housing plate 27 and the cutting jaws 23, 26 extend parallel to the pliers head plane with a pivoting of the movable cutting jaw 23 about the predetermined by the pivot bearing 25 pivot axis, which is oriented vertically to the pliers head plane. The cutting jaws 23, 26 are guided past each other with the smallest possible distance.

In the in Fig. 2 illustrated operating position, the cutting jaws 23, 26 form a receptacle 28 for a workpiece to be cut by means of the hand tool 1. Here, the receptacle 28 is limited by the with the cutting edge 24 of the movable cutting jaw 23 and the fixed Cutting jaw 26 formed receiving or cutting contour 29, the cross-sectional area is reduced over the working stroke of the forceps 1 and whose geometry varies over the working stroke of the hand tool 1.

Fig. 3 shows a detail III of the illustration according to Fig. 2 , The hand tool 1 is here in a starting position, in which a workpiece, in particular a cable, has been inserted into the receptacle 28. The latching lever 16 has a latching lug 30, which engages in the toothing 32 of the movable cutting jaw 23 for latching the pivoting position of the movable cutting jaw 23. In the end region facing away from the pivot bearing 20, the push lever 19 has a toothing 31, which according to FIG Fig. 2 engages the toothing 32 of the movable cutting jaw 23. The first maximum opening position of the hand lever 2, 3 is (despite the action of the movable hand lever 3 by the opening spring 11 to the outside) predetermined by a nose or a projection 33 of the hand lever plate 5 to the plant comes in a rough approximation L-shaped angled portion or a lever portion 34 of the locking lever 16. In the first maximum open position according to Fig. 2 and 3 Both the locking lug 30 of the locking lever 16 and the toothing 31 of the push lever 19 are in engagement with the toothing 32 of the cutting jaw 23rd

If, by application of actuating forces on the hand lever 2, 3, a movement of the hand lever 2, 3 in a first partial working stroke towards each other, this has the consequence that the push lever 19 via the engagement of the teeth 31, 32 applies a closing force on the movable cutting jaw 23 with a component which is oriented in the circumferential and closing direction about the pivot axis of the pivot bearing 25, whereby a partial closure of the cutting jaws 23, 26 takes place with a reduction in the cross-sectional area of the cutting contour 29. Thus, a partial incision of the arranged in the receptacle 28 workpiece , During this closing movement of the movable cutting jaw 23, the locking lever 16 spring open to the outside and the locking lug 30 depending on the extent of movement of the movable cutting jaw 23 slide over the teeth 32 with successive engagement in the intervening tooth spaces of the teeth 32. However, the closing actuating forces are reduced and eliminated and instead the hand lever 2, 3 again opened for a further partial working stroke of the hand tool 1, by the engagement of the latching lug 30 of the locking lever 16 in the last achieved interdental space of the toothing 32 a previously achieved closed position of the cutting jaws 23, 26 secured while for this Opening movement of the thrust lever 16 can spring open and the teeth 31 of the thrust lever 19 via the toothing 32 of the movable cutting jaw 23 can slide. Thus, during the opening movement of the engagement point of the toothing 32 of the push lever 19 to the toothing 32 of the cutting jaw 23 for the next partial working stroke is then again the closure of the hand lever 2, 3, which (according to the explanation of the previous partial working stroke) the thrust lever 19 a further closure of the cutting jaws 23, 26 may cause sliding of the locking lug 30 of the locking lever 16 via the teeth 32. Several such strokes are successively carried out until the cutting contour is completely closed, whereby a cutting of the workpiece is carried out.

If, despite the application of large actuating forces on the hand lever 2, 3 is not possible to completely cut through the workpiece, the actuation process must be canceled before the power stroke has been completed. This leads initially due to the considerable elastic compression of the workpiece to a resilient opening movement of the cutting jaws 23, 26, for which in principle the teeth 31 of the push lever 19 along the teeth 32 can slide. However, such an opening movement does not allow the locking lever 16 (or only limited depending on the relative position of the locking lug 30 to the teeth 32). Rather, the locking lug 30 of the locking lever 16 engages blocking in the toothing 32 of the cutting jaw 23, whereby a further auffedernde opening movement of the cutting jaws 23, 26 is not possible. Given the possibly high contact pressure between the locking lug and the toothing 32 due to the elastic springing of the workpiece, it may be possible that a simple manual actuation of the locking lever 16 in the opening direction to allow further opening of the cutting jaws 23, 26 and the removal of the not possible to cut partially cut workpiece. This situation is in Fig. 5 shown with the solution of the toothing 31 of the push lever 19 of the teeth 32 of the movable cutting jaw 23, but the engagement of the locking lug 30 of the locking lever 16 in the toothing 32 of the cutting jaw 23rd

In order to still allow the release of the locking lever 16 and the further opening of the cutting jaws 23, 26 are, according to Fig. 6 the hand lever 2, 3 slightly closed under renewed elastic compression of the workpiece. This has the consequence that the thrust lever 19 engages with its toothing 31 again in the toothing 32 of the cutting jaw 23. With increasing the transmitted from the thrust lever 19 on the cutting jaw 23 actuating force an increasing relief of the contact between the locking lug 30 of the locking lever 16 and the toothing 32 of the cutting jaw 23, which then also the manual release of the locking lever 16 by pivoting the same away from the teeth 32 is possible ( Fig. 7 ). Thus, with actuated latching lever 16, the opening of the cutting jaws 23, 26 take place, whereby the removal of the workpiece is made possible.

For the opening of the hand lever 2, 3, the maximum open position is not predetermined by the abutment of the projection 33 of the hand lever plate 5 on the lever member 34 of the locking lever 16. Rather, for actuated locking lever 16 of the projection 33 with the opening movement of the hand lever 3, the lever member 34th pass, whereby a second maximum opening angle is possible, which is greater than the first maximum opening angle according to Fig. 3 , In the second maximum open position then engages the projection 33 of the hand lever plate 5 behind the lever member 34. The opening spring 11 acts on the projection 33, the hand lever part 34 in the opening direction of the locking lever 16, so that in the second maximum open position and the locking lever 16 secured in one position is, in which the latching lug 30 of the locking lever 16 is not in engagement with the toothing 32 of the cutting jaw 23. In this second maximum opening position thus a new workpiece can be inserted into the receptacle 28, wherein it is also possible that the cutting jaws 23, 26 are closed manually over a partial stroke until they create the lateral surface of the new workpiece.

With a slight closure of the hand lever 2, 3, starting from the second maximum opening position, the contact surface 35 of the projection 33 slides along the associated contact surface 36 of the lever member 34 of the pivot pin 17 away. Preferably, the frictional force between the abutment surface 35 and the contact surface 36 depends solely on the force of the biasing spring 13. Preferably, to facilitate the illustrated sliding movement between the contact surface 36 and the abutment surface 35 without concomitant significant pivoting of the detent lever 16, the abutment surface 35 is concentric with the pivot axis formed of the pivot bearing 52. Come at the end of this sliding movement of the projection 33 and the lever member 34 is disengaged, the biasing spring 13 can come into effect by the locking lever 16 pivots in the direction of the toothing 32 for bringing about the engagement of the locking lug 30. At the same time then forms the outer end 69 of the lever member 34 (again) a stop 67 for the projection 33, whereby a limitation of the open position of the hand lever 2, 3 takes place on the first maximum open position.

It is possible that with the movement of the hand lever 3 in the second maximum open position, not only the locking lever 16 is pivoted away from the toothing 32. Rather, it can be done accordingly Fig. 8 also in the partial stroke of the normal maximum opening stroke to the extended maximum opening stroke an extension 37 of the thrust lever 19 come to rest on a contact surface, which is not moved with the pivoting of the hand lever 3. For the illustrated embodiment, this contact surface is formed by the spacer 14. With bringing about the contact between the extension 37 and the spacer 14, the pivoting of the hand lever 3 in the opening direction (ie in Fig. 8 clockwise) to the fact that due to the contact of the extension 37 on the spacer 14 of the extension 37 and thus the thrust lever 19 are pivoted in the opposite direction, ie counterclockwise, so that the thrust lever 19 is pivoted away from the teeth 32. In the extended opening position according to Fig. 8 (which is automatically maintained as a result of the action of the hand lever 2, 3 by the opening spring 11) are thus both the locking lever 16 and the push lever 19 in a secured position in which they are not engaged with the teeth 32 of the cutting jaw 23rd It is thus possible to pivot the cutting jaw 23 freely. This can be used to that after inserting the workpiece in the maximum open cutting jaws 23, 26 manually without actuation of the hand lever 2, 3, the cutting jaws are manually pivoted toward each other until they rest against the lateral surface of the workpiece. Only in this position then the operation of the hand lever 2, 3 takes place with the bringing about the engagement of the locking lever 16 and / or the push lever 19 in the toothing 32 of the cutting jaw 23. This has the advantage that with the beginning of the actual power stroke of the hand tool no idle stroke by closing the hand lever 2, 3, until the cutting jaws 23, 26 abut the lateral surface of the workpiece, is required, whereby the number of required partial strokes can be reduced.

If the hand lever 2, 3 closed, the locking lever 22 can be pivoted about the pivot bearing 21 inwardly, that this engages positively in a recess, not shown here, the cutting jaw 23, whereby a positional fixation of the hand lever 3 takes place. This is advantageous for the compact storage of the hand tool with closed hand levers 2, 3, for example in a tool box.

• eine Antriebskopplung der Handhebel 2, 3 mit den Schneidbacken 23, 26 besteht, eine Begrenzung auf die erste maximale Öffnungsstellung (vgl. Fig. 3) erfolgt, ein Eingriff der Rastnase 30 des Rasthebels 16 in die Verzahnung 32 der Schneidbacke erfolgt und/oder der Rasthebel 16 manuell betätigt worden ist (im Folgenden "Lade- und Entnahmestellung")
  oder
• keine Antriebskopplung der Handhebel 2, 3 mit den Schneidbacken 23, 26 besteht, eine Begrenzung auf die zweite maximale Öffnungsstellung (vgl. Fig. 8) erfolgt, kein Eingriff der Rastnase 30 des Rasthebels 16, der Verzahnung 31 des Schubhebels 19 in die Verzahnung 32 der Schneidbacke erfolgt und/oder der Rasthebel 16 nicht manuell betätigt worden ist (im Folgenden "Betriebsstellung")

sind unterschiedliche Anschläge 67, 68 und Kontaktflächen für die Handhebelplatte 5 wirksam:

• In der Lade- und Entnahmestellung presst die Öffnungsfeder 11 den Handhebel 3 mit der Anlagefläche 34 des Vorsprungs 33 gegen die Kontaktfläche 36 des Hebelteils 34, wobei auch möglich ist, dass der Vorsprung 33 stirnseitig an dem Schwenkbolzen 17 bzw. Abstandshalter 18 anliegt, womit der Schwenkbolzen 17 einen Anschlag 68 bildet. Hierdurch wird die Lade- und Entnahmestellung oder die zweite maximale Öffnungsstellung gesichert.
• Hingegen presst in der Betriebsstellung zu Beginn des Arbeitsvorgangs die Öffnungsfeder 11 den Vorsprung 33 des Handhebels 3 an die außenliegende Stirnseite 69 des Hebelteils 34 an, womit die Begrenzung des ersten maximalen Öffnungswinkels erfolgt.

It depends on

• a drive coupling of the hand lever 2, 3 with the cutting jaws 23, 26 is a limitation to the first maximum open position (see. Fig. 3 ) takes place, an engagement of the locking lug 30 of the locking lever 16 in the toothing 32 of the cutting jaw takes place and / or the locking lever 16 has been operated manually (hereinafter "loading and unloading position")
  or
• no drive coupling of the hand lever 2, 3 with the cutting jaws 23, 26 is a limitation to the second maximum open position (see. Fig. 8 ), no engagement of the locking lug 30 of the locking lever 16, the teeth 31 of the push lever 19 in the teeth 32 of the cutting jaw and / or the locking lever 16 has not been manually operated (hereinafter "operating position")

are different stops 67, 68 and contact surfaces for the hand lever plate 5 effective:

• In the loading and unloading position, the opening spring 11 presses the hand lever 3 with the contact surface 34 of the projection 33 against the contact surface 36 of the lever member 34, wherein it is also possible that the projection 33 on the front side of the pivot pin 17 and spacer 18 is applied, whereby the Swivel pin 17 forms a stop 68. As a result, the loading and removal position or the second maximum open position is secured.
• On the other hand, in the operating position at the beginning of the working process, the opening spring 11 presses the projection 33 of the hand lever 3 against the outer end side 69 of the lever part 34, thus limiting the first maximum opening angle.

For hand tools according to the prior art, cf. for example. DE 43 03 180 C1 , the closing of the hand lever is done by moving the movable hand lever in a clockwise direction, whereby the movable cutting jaw with the same sense of direction, ie here also in a clockwise direction, is operated. On the other hand, for the embodiment shown here, the movement of the movable hand lever 3 in the clockwise direction with this associated movement of the movable cutting jaw 23 in the counterclockwise direction. This is due to the fact that for the cited prior art, the pivot bearing for the thrust lever 19th is arranged between the pivot bearing 10 for the articulation of the hand lever 3 and the handle 7, while the pivot bearing 10 is arranged for the articulation of the hand lever 3 between the pivot bearing 20 for the articulation of the thrust lever 19 and the handle 7 for the embodiment shown here. As a result, according to the prior art, the thrust lever force component exerted on the thrust lever 19 by the gearing, which momentarily generates about the pivot bearing 52, is oriented opposite to the operating force component applied to the hand lever 3 by the user, which is about the pivot bearing 52 acts. On the other hand, for the embodiment shown here, the thrust lever force component 55 exerted on the thrust lever 19 by the toothing, which generates a moment about the pivot bearing 52, has the same sense of direction as the actuation force component 56 applied by the user to the hand lever 3 acting around the pivot bearing 52. While prior art embodiments of the movable hand lever with respect to the pivot bearing for the articulation of the movable hand lever on the fixed hand lever forms only one pivot arm on which attack both the actuating force component and the Schubhebelkraftkomponente on the same side of the pivot bearing forms for the illustrated Embodiment of the hand lever 3 and the hand lever plate 5 on both sides of the pivot bearing 52 lever parts, being hinged to a lever part of the push lever 19, so that then the Schubhebelkraftkomponente 55 acts, while on the other lever part, the actuating force component 56 acts.

The locking lever 16 forms directly and integrally an actuating member 57, which is in particular the outstanding from the pliers head, accessible from the outside end portion of the locking lever 16. Thus, the unlocking of the locking lever 16 is not carried out via another component and / or an intermediate geared connection.

A foot of the biasing spring 13 acts on the thrust lever 19 in the direction of the toothing 32 of the movable cutting jaw 23, while the other foot of the biasing spring 13, the locking lever 16 in the direction of the toothing 32 of the movable cutting jaw 23 is applied, whereby the biasing spring 13 is used multi-functional.

According to the invention, on the one hand find the multifunctional Beaufschlagungsfeder 13 for acting on both the locking lever 16 and the push lever 19 and on the other hand a separate opening spring 11 for the application of the hand lever 2, 3 in the opening direction use.

The opening spring 11 generates in the open position according to Fig. 3 a contact force with which the projection 33 is pressed in the direction of the pivot pin 17 to the outer end side 69 of the lever member 34 of the locking lever 16. The front side 69 of the lever member 34 thus forms a stop 67 for the hand lever 3 or the hand lever plate 5. To bring about the loading and removal position, ie an unlocking of the locking lever 16, there is a pivoting of the locking lever 16 in the direction of the handle 7, ie away from the pliers head. Preferably, the pivoting movement for the unlocking of the locking lever 16 can be brought about with the thumb, while the rest of the user's hand continues to rest on the hand lever 3 or even on both hand levers 2, 3. The radial extent of the lever part 34, that is to say the distance of the radially outer end side 69 of the lever part 34 from the lateral surface of the pivot pin 17, predetermines the difference between the first maximum open position and the second maximum open position.

The pivoting of the movable cutting jaw 23 and the movable hand lever 3 and the hand lever plate 5 is preferably carried out in the same plane, which is arranged between the two housing plates 9, 27. For all possible pivoting angle of the hand lever plate 5, there is no overlap on the one hand the hand lever plate 5 and the moving components and on the other hand, the movable cutting jaw 23 in viewing direction vertical to the pliers head plane.

The hand tool 1 is made in order to reduce the variety of components, simplifying the storage and manufacturing modular or modular principle. Here, the hand tool 1 with a pliers head module 38, a transmission module 39 and at least one hand lever module 40 is formed.

The transmission module 39 has the transmission elements such as the locking lever 16, the thrust lever 19 and at least the pivot bearing 20 forming part of the hand lever plate 5, the spacers 14, 15, 18 and / or the pivot pins 10, 17 and / or the bolt 12, which may be held captive thereto or may be connected only loosely before the connection of the transmission module 39 with other modules. The transmission module 39 is not formed closed on both sides of the pliers head plane, but rather limited only on one side by the housing plate 9, while the aforementioned components of the transmission module 39 from the other side via an opening 63 are freely accessible. Preferably, the spacers 14, 15, 18, the pin 12, the pivot pin 10 and the pivot pin 17 are received, stored or held only in one of its end portions in the housing plate 9, while this can be supported on the aforementioned other components and the other end the assembly of the pliers head module 38 is still free.

According to Fig. 9 The transmission module 39 also integrally forms the hand lever plate 4 and also the hand lever plate 5 extends integrally into the transmission module 39, thus forming a base module 41. The basic module 41 provides, on the one hand, the support elements for the handles 6, 7 and, on the other hand, the housing plate 9 and the components of the transmission module 39 held thereon.

According to Fig. 9 For example, the same basic module 41 can optionally be combined by the manufacturer with the different pliers head modules 38a, 38b, 38c. For this purpose, no adjustments to the components of the transmission module 39 or basic module 41 are required, in particular no change in shape or contour, no exchange of components and / or no adaptation of bore diameters or the adaptation of a Bohrbilds.

The pliers head module 38a is a so-called front-cutting pliers head module, in which the receptacle 28 formed by the cutting jaws 23, 26 is not closed in the circumferential direction but is open (for example U-shaped or V-shaped). By contrast, the pliers head modules 38b, 38c are wrap-around pliers head modules in which the cutting dies 23, 26 delimit a receptacle 28 which is closed in the circumferential direction at the beginning of the working stroke and during the entire working stroke. Here, the pliers head modules 38b, 38c differ with respect to the size of the cutting jaws 23, 26, the formed receptacle 28, the cutting contour 29 and with respect to the machined with the pliers head modules 38b, 38c workpieces and geometries thereof.

According to Fig. 9 The pliers head modules 38a, 38b, 38c each have a housing plate 27, which the same holes at the same locations, with the same relative positions and have the same diameters. These holes are explained by way of example with reference to the pliers head module 38a, which applies correspondingly to the pliers head modules 38b, 38c:

A bore 42 serves to receive the pivot pin 10. A bore 44 serves to receive the pivot pin 17 or spacer 18, while an adjacent bore 45 of the recording of the bolt 12 is used. Another, arranged in the lower end of the housing plate bore 45 serves to receive the spacer 15. Another bore 46 serves to receive an end portion of a base point of the opening spring 11, here a leg of the spiral or leg spring.

For the assembly of the respective pliers head module 38a, 38b, 38c, this is approximated to the base module 41 from the open side of the transmission module 39 in alignment parallel to the housing plate 9 of the transmission module 39 until the end portions of the pivot pin 17, spacer 18, bolt 12th , Pivot pin 10, spacer 14, the opening spring 11 and the spacer 15 have entered into the associated holes 42 to 46. A fixation can by pressing or additional security measures, for example. Widening, screwing u. Ä. The end position of the housing plates 9, 27 with a predetermined distance of the housing plates 9, 27 from each other is predetermined by the spacers 14, 15, 18. With this assembly of the housing plate 27 then the components between the housing plates 9, 27 captive caught in any case , wherein the moving components can then be guided between the housing plates 9, 27 and the two end portions of the pivot pin 17, spacer 18, bolt 12, pivot pin 10, spacer 14 and spacer 15 are each held in a housing plate 9, 27.

Preferably, the housing plate 27 of the pliers head module 38 may be equipped with an additional bore 47, which for the application according to Fig. 9 is without function.

According to Fig. 10 the combination of a pliers head module 38b (and correspondingly also other pliers head modules 38a, 38c) with different basic modules 41a, 41b, 41c, these basic modules 41a, 41b, 41c preferably identical transmission modules 39 and in particular identical housing plates 9 with identical hole patterns and bore diameters and identical transmission elements such as locking lever 16 and push lever 19 feature. For ease of illustration, the spacers, detent levers, thrust levers, pivot pins, and the various springs and detent lever are shown only for the base module 41b, although they are also identical for the base modules 41a, 41c.

The base module 41a has over the base module 41b hand lever extensions 48, 49, in which it is plate-like extensions, which partially overlap with the hand lever plates 4, 5 and are connected to these, in particular via a riveting, screwing, cohesive bonding u. On the other hand, reinforcements 50, 51 are provided for the basic module 41c in the region of the hand lever 2, 3, which extend in the region of the hand lever 2, 3 parallel to the hand lever plates 4, 5 and which, kept at a distance, from the hand lever plates 4, 5 are worn. For this purpose, the reinforcement 50 is supported in the gear module 39 facing the end region via the spacer 15 on the housing plate 9 from. In addition, another, not shown here spacer used, which takes place in the bore 47 of the housing plate 27 and a corresponding bore of the reinforcement 50. An additional attachment, in particular screw, riveting or material connection can, in particular using additional spacers, in Range of handles 2, 3 done. The same applies to the connection between the reinforcement 51 with the hand lever plate 5, wherein here also a connection between the reinforcement 51 and the hand lever plate 5 by the pivot pin 10 and a pivot pin for the purpose of forming the pivot bearing 21 can take place.

While for the previously described embodiments, the housing plate 9 and the hand lever plate 4 were integrally formed, shows Fig. 11 an embodiment in which they are formed separately from each other, whereby the housing plate 9 is part of the transmission module 39, while the hand lever plate 4 is part of a hand lever module 40. This shows Fig. 11 different hand lever modules 40a, 40b, which can be selectively connected to a transmission module 39. Again, the connection takes place both via the spacer 15 and via a further spacer which extends through the bore 47. Such a base module 41 formed with the hand lever module 40a, 40b and the gear module 39 can then optionally be mounted with a pliers head module 38b (or also 38a, 38c). The hand lever module 40b has a configuration which has finger recesses for the fingers of the hand of the user of the hand tool 1. In the state disassembled by the pliers head module 38, the gear module 39 forms an interface 58, via which the gear module 39 can be mounted with a corresponding mating interface 59 of a pliers head module 38, which is formed here by the housing plate 27. Here, the interface 58 of the transmission module 39 is preferably formed with the free end portions of the spacers 14, 15, 18, the pivot pin 10 and the bolt 12. On the other hand, the counter-interface 59 is formed with the holes 42 to 47. Accordingly, have the transmission modules 39th also interfaces 60, via which they can be coupled with identical counter-interfaces 61 different hand lever modules 40a, 40b, 40c. In this case, the interfaces 60 are formed by bores and / or the spacer 15, as well as further bores 62 to which the hand lever modules 40a, 40b, 40c can be mounted.

The housing plate 27 of the pliers head module 38 is preferably formed integrally with the fixed cutting jaw 26. Preferably, the pliers head module 38 consists exclusively of a formed with the housing plate 27 and the fixed cutting jaw 26 main body 66, which is particularly flat, the movable cutting jaw 23 and the components which are required to form the pivot bearing 25. Preferably, the base body 66, which forms the cutting jaw 26 and the housing plate 27, formed as precision casting. For further components, in particular the hand lever plates 4, 5 with the housing plate 9, a production can be carried out by punching.

For the embodiments according to Fig. 10 can basically be the same hand tool 1 on the one hand only with a hand lever plate per hand lever and on the other hand formed with double hand lever plates per hand lever, the latter embodiment provides a hand tool 1 with increased rigidity and strength.

In a plan view according to Fig. 2 and vertical to the pliers head plane divides the pivot bearing 52 and a longitudinal axis 64 extending therethrough, the hand tool 1 in a right half-longitudinal plane and a left half longitudinal plane 65. The handle 7 of the movable hand lever 3 and the locking lever 16 including its storage in the region of the pivot bearing 53 are in this case Half-length 65 arranged. If the hand lever 3 for an opening of the hand lever 2, 3 in Fig. 3 pivoted clockwise, this correlates with a pivoting of the locking lever 16 for unlocking the same from the teeth 32 in the counterclockwise direction. The actuator 57 of the locking lever 16 and the handle 7 of the movable hand lever 3 are arranged on the same side of the hand tool 1.

A hand tool 1 of the present type is also referred to elsewhere as a "ratchet cutter".

In the feed direction of the push lever 19, the locking lug 30 of the locking lever 16 engages in front of the thrust lever 19 in the toothing 32 of the movable cutting jaw.

The detent lever 16 has, in addition to the lever part 34, a longer lever part whose end region facing away from the pivot bearing 53 forms the actuating member 57. At this lever part, the latching lug 30 is formed between the pivot bearing 53 and the actuator 57. This lever part forms approximately a right angle with the lever part 34.

For the illustrated embodiment, the locking lever 16 exclusively has a latching nose 30. In a modification, the locking lever 16 may also be formed with a locking toothing, which engages in the toothing 32 of the movable cutting jaw 23.

Between the hand lever 2, 3 and the cutting jaws 23, 26, a gear is interposed, which has the thrust lever 19 and the locking lever 16 as arranged parallel to each other in the power flow transmission elements. The transmission is laterally open and in the mounted state transverse to the pliers head plane in each case in one direction by a housing plate 9, 27 limited. By contrast, the gear module 39 is limited without attached thereto pliers head module 38 transversely to the pliers head plane in one direction only by the housing plate 9.

LIST OF REFERENCE NUMBERS

1

hand tool

2

solid hand lever

3

movable hand lever

4

Hand lever plate

5

Hand lever plate

6

handle

7

handle

8th

cranking

9

housing plate

10

pivot pin

11

opening spring

12

bolt

13

bias spring

14

spacer

15

spacer

16

locking lever

17

pivot pin

18

spacer

19

thrust lever

20

pivot bearing

21

pivot bearing

22

Locking lever

23

movable cutting jaw

24

cutting edge

25

pivot bearing

26

fixed cutting jaw

27

housing plate

28

admission

29

cutting contour

30

locking lug

31

Toothing thrust lever

32

Toothing cutting jaw

33

head Start

34

lever part

35

contact surface

36

contact area

37

extension

38

Pliers head module

39

transmission module

40

Hand lever module

41

basic module

42

drilling

43

drilling

44

drilling

45

drilling

46

drilling

47

drilling

48

Hand lever extension

49

Hand lever extension

50

reinforcement

51

reinforcement

52

pivot bearing

53

pivot bearing

54

pivot pin

55

Thrust lever force component

56

Actuating force component

57

actuator

58

interface

59

Counter interface

60

interface

61

Counter interface

62

drilling

63

opening

64

longitudinal axis

65

Half longitudinal plane

66

body

67

attack

68

attack

69

front

Claims (12)

Group of hand tools (1) a) with manual tongs of a first subgroup and b) with manual tongs of a second subgroup, c) wherein the hand tools of the first subgroup and the hand tools of the second subgroup are designed and intended for the machining of different workpieces,
characterized in that d) the hand tools of the first subgroup and the hand tools of the second subgroup are modular and have identically formed transmission modules (39). Group of hand tools (1) according to claim 1, characterized in that the identically designed transmission modules (39) of the manual tongs (1) of the two sub-groups a) identical interfaces (58) for connecting the gear module (39) with identical counter-interfaces (59) different pliers head modules (38a, 38b, 38c) for the formation of the hand tools (1) of the first subgroup on the one hand and the formation of hand tools (1 ) of the second subgroup on the other hand and / or b) identical interfaces (61) for connecting the gear module (39) with identical counter-interfaces (61) of different hand lever modules (40a, 40b, 40c) for the formation of the hand tools (1) of the first subgroup on the one hand and the formation of hand tools (1 ) of the second subgroup exhibit. Group of hand tools (1) according to claim 1 or 2, characterized in that the gear modules (39) each have a housing plate (9), on which pivot pin (10, 17) held and / or during actuation of the hand tools moving gear elements of the transmission module (39) are stored. Group of hand tools (1) according to claim 3, characterized in that a) the transmission module (39) has an opening (63) through which pivot pins (10, 17) and / or during operation of the hand tools moving gear elements of the transmission module (39) are accessible for disassembled pliers head module (38), and b) the opening (63) with mounted pliers head module (38) by a housing plate (27) of the pliers head module (38) is at least partially closed. Group of hand tools (1) according to claim 4, characterized in that a) at least one during the operation of the hand tools (1) moved gear element and / or b) a movable hand lever (3) are rotatably mounted both with respect to the housing plate (27) of the pliers head module (38) and with respect to the housing plate (9) of the transmission module (39). Group of hand tools (1) according to one of the preceding claims, characterized in that the housing plates (9) of the gear modules (39) are formed integrally with a hand lever or a hand lever plate (5). Group of hand tools (1) according to claim 6, characterized in that the housing plate (9) via a crank (8) in the hand lever or the hand lever plate (5) passes. Group of hand tools (1) according to one of the preceding claims, characterized in that at least one hand lever (2, 3) and / or one or the housing plate (9) of the gear module (39) are punched from a sheet metal / is. Group of hand tools (1) according to one of the preceding claims, characterized in that a) hand tools (1) of the first subgroup have a pliers head module (38 a) with scissors-like open cutting jaws (23, 26) and b) having forceps (1) of the second subgroup a pliers head module (38b, 38c) with circumferentially closed cutting jaws (23, 26). Group of hand tools (1) according to one of the preceding claims, characterized in that in the manual tongs (1), the pivoting direction of a movable hand lever (3) is oriented opposite to the pivoting direction of an associated movable cutting jaw (23). Group of hand tools (1) according to claim 10, characterized in that the movable hand lever (3) between a pivot bearing (20) for the storage of the push lever (19) on the movable hand lever (3) and a handle (7) of the hand lever ( 3) is pivotally mounted on a housing plate (9) of the transmission module (39). Group of hand tools (1) according to one of the preceding claims, characterized in that a) the pliers head modules (38) are formed with a one-piece base body (66), which forms a housing plate (27) and a fixed cutting jaw (26), b) the transmission module (39) is formed with a housing plate (9) and c) with the assembly of the pliers head module (38) with the gear module (39) at least one pivot pin (10, 17) in an end region on the housing plate (27) of the base body (66) of the pliers head module (38) and in another end region on the Housing plate (9) of the transmission module (39) is mounted or mounted.

Images