阅读说明：本技术 压紧或压接钳 (Pressing or crimping pliers ) 是由 T·格洛克赛森 R·青泽尔 于 2019-08-15 设计创作，主要内容包括：本发明涉及一种压紧或压接钳(1)。所述压紧或压接钳(1)具有定钳颚(4)和动钳颚(6)。所述动钳颚(6)的闭合运动能够通过动手杆(9)的摆动通过曲杆传动装置(11)实现。根据本发明设置有另外的杆(48),所述另外的杆尤其是附加手杆(49)的形式。所述另外的杆(48)与所述动钳颚(6)耦合,使得借助所述另外的杆(48)的摆动能够引起所述动钳颚(6)打开运动到置入和/或取出位态(56)中。(The invention relates to a clamping or crimping tool (1). The pressing or crimping pliers (1) are provided with a fixed jaw (4) and a movable jaw (6). The closing movement of the movable jaw (6) can be realized by the swing of the hand lever (9) through the curved lever transmission device (11). According to the invention, a further lever (48) is provided, in particular in the form of an additional hand lever (49). The further lever (48) is coupled to the movable jaw (6) in such a way that pivoting of the further lever (48) causes an opening movement of the movable jaw (6) into a insertion and/or removal position (56).)

1. A compression or crimping tong (1) having:

a) a fixed jaw part (2) having a fixed handle bar (5) and a fixed jaw (4), an

b) A hand lever (9) which is coupled to the movable jaw (6) via a drive (10) in such a way that a pivoting movement of the hand lever (9) in the direction of the fixed lever (5) can cause a closing movement of the movable jaw (6) by means of which a workpiece (57) can be pressed or pressed,

it is characterized in that the preparation method is characterized in that,

c) a further lever (48) is provided, wherein the further lever (48) is coupled to the movable jaw (6) by means of a drive connection such that a pivoting movement of the further lever (48) can bring about an opening movement of the movable jaw (6) into a setting and/or removal position (56).

2. Pressing or crimping pliers (1) according to claim 1, characterized in that the further lever (48) is an additional hand lever (49) which is arranged between the fixed hand lever (5) and the movable hand lever (9).

3. Pressing or crimping pliers (1) according to claim 2, characterized in that the further lever (48) is coupled with the movable jaw (6) by the drive connection such that an opening movement of the movable jaw (6) can be brought about by pivoting the further lever (48) in the direction of the fixed-hand lever (5).

4. The compaction or crimping pliers (1) according to claim 3, wherein the driving connection is a fixed connection of the further rod (48) to the movable jaw (6).

5. The crimping or pressing jaw (1) according to one of the preceding claims, characterized in that an opening spring (42) is present, which acts on the movable jaw (6) and the movable lever (9) such that the movable jaw (6) and the movable lever (9) are automatically moved from a closed position (60) of the movable jaw and the movable lever in an opening direction.

6. The crimping or pressing jaw (1) according to one of the preceding claims 1 to 4, characterized in that a closing spring (36) is present, which acts on the movable jaw (6) and the further lever (48) in such a way that the movable jaw (6) is loaded in the closing direction of the movable jaw and the further lever (48) is automatically loaded from the closed position of the further lever in the direction of the open position.

7. The crimping or pressing jaw (1) according to claim 5, characterized in that a closing spring (36) is present, which acts on the movable jaw (6) and the further lever (48) in such a way that the movable jaw (6) is loaded in the closing direction of the movable jaw and the further lever (48) is automatically loaded from the closed position of the further lever in the direction of the open position.

8. Pressing or crimping pliers (1) according to claim 7,

a) the closing spring (36) is articulated to the stationary jaw part (2) by means of a spring base point (37) and to the movable jaw part (3) by means of a further spring base point (39), and/or

b) The opening spring (42) is articulated on the fixed jaw part (2) by means of a spring base point (43) and on the hand lever (9) by means of a further spring base point (45).

9. Pressing or crimping pliers (1) according to one of claims 1 to 4,

a) the drive mechanism (10) having a gap (50) which is delimited by a stop (52) and by which the movable lever (9) is coupled to the movable jaw (6),

b) during the pivoting of the handle lever (9) in the direction of the fixed lever (5) in conjunction with the closing movement of the movable jaw (6) into the closed position, the drive element of the drive mechanism (10) bears against the stop (52) for transmitting the pressing or crimping force, and

c) during the pivoting of the further lever (48) together with the opening movement of the movable jaw (6) into the insertion and/or removal position (56), the drive element leaves the stop (52) while making full use of the gap (50).

10. Pressing or crimping pliers (1) according to claim 7,

a) the drive mechanism (10) having a gap (50) which is delimited by a stop (52) and by which the movable lever (9) is coupled to the movable jaw (6),

b) during the pivoting of the handle lever (9) in the direction of the fixed lever (5) in conjunction with the closing movement of the movable jaw (6) into the closed position, the drive element of the drive mechanism (10) bears against the stop (52) for transmitting the pressing or crimping force, and

c) during the pivoting of the further lever (48) together with the opening movement of the movable jaw (6) into the insertion and/or removal position (56), the drive element leaves the stop (52) while making full use of the gap (50).

11. The clamping or crimping pliers (1) according to claim 9, characterized in that the gap (50) is at least so large that in the open position of the hand lever (9) the movable jaw (6) can be moved from the closed position into the open position in relation to the position of the further lever (48) without the hand lever (9) leaving its open position.

12. Pressing or crimping pliers (1) according to claim 10, characterized in that the gap (50) is at least so large that in the open position of the hand lever (9) the movable j aw (6) can be moved from the closed position into the open position in relation to the position of the further lever (48) without the hand lever (9) leaving its open position.

13. Pressing or crimping pliers (1) according to claim 7, characterized in that in the open position of the hand lever (9),

a) the opening spring (42) exerts no opening spring force on the movable jaw (6), and

b) the closing spring (36) exerts a closing spring force on the movable jaw (6), which closing spring force is the smallest in the closed position of the further lever (48) and the largest in the open position of the further lever (48).

14. Pressing or crimping pliers (1) according to claim 11, characterized in that the drive mechanism (10) has an elongated hole (51) which provides the gap (50), wherein the stop (52) is formed by an end region of the elongated hole (51).

15. Pressing or crimping pliers (1) according to claim 12, characterized in that the drive mechanism (10) has an elongated hole (51) which provides the gap (50), wherein the stop (52) is formed by an end region of the elongated hole (51).

16. Pressing or crimping pliers (1) according to one of claims 1 to 4, characterized in that the drive mechanism (10) is a knee lever transmission (11).

17. Pressing or crimping pliers (1) according to claim 15, characterized in that the drive mechanism (10) is a knee lever transmission (11).

18. Pressing or crimping pliers (1) according to claim 17, characterized in that the knee lever transmission (11) has a swivel bolt (23) which is received in the elongated hole (51).

19. Pressing or crimping pliers (1) according to one of claims 1 to 4, characterized in that there are positive locking means (37) which are present

a) The movement of the movable jaw (6) caused by the additional lever (48) is unlocked, and

b) locking the movement of the movable jaw (6) caused by the hand lever (9).

Technical Field

The invention relates to a pair of pressing or crimping pliers. By means of the pressing or crimping pliers, the workpiece can be pressed or crimped by manually operating the hand lever.

Background

Here, crimping pliers (Crimpzange) are used in particular for producing long-lasting mechanical and electrical contacts. This is preferably achieved by crimping the plug with a cable or electrical conductor of any type of construction. Depending on the profile of the die used, different crimping processes can be carried out by means of crimping pliers. For example, a closed crimp can be provided, in which the conductor is introduced into a closed crimp zone of the plug or into a closed sleeve and crimped by elastic deformation of the crimp zone or the sleeve. However, open crimping can also be produced, in which the plug has an open crimping zone into which the conductor is placed from above. To name but a few non-limiting embodiments of the invention, crimping can be performed with a crimping tool associated therewith, such as

A cable jacket according to DIN 4623,

an aluminum connector according to DIN 46329,

an aluminium cable bushing according to DIN 48201,

-an extruded cable jacket according to DIN 46234,

pin and cable housings according to DIN 46230, or

Connectors, plugs or cable jackets for connection to cables or conductors, for example those described in the product catalog "tools for professional use" with the serial number 10/11 from the WEZAG limited tool factory. The produced crimp can be a hexagonal crimp or a hexagonal crimp, a quadrangular crimp, a B crimp, a trapezoidal crimp, a modified trapezoidal crimp, an elliptical crimp, a mandrel crimp or a double mandrel crimp, for example, for a closed crimp. The open crimp can be configured, for example, as a V-crimp or a B-crimp, a coil crimp or a double coil crimp.

In addition to producing an electrical connection between the cable or conductor and the plug, a mechanical connection can also be produced by means of a so-called insulation crimp. Closed insulation crimping or open insulation crimping (in particular V crimping or B crimping, O crimping or OV crimping) can be used here. Additional information regarding the following

The configuration of a crimping pliers of this type,

possible ranges of use of such crimping pliers and/or

The various possible types of crimp connections that can be produced with the aid of such crimping pliers,

reference is made to the following documents:

-“Crimptechnik,Herstellung prozesssicherer Verbindungenvonelektrischen Leitern und Steckern”der WEZAG GmbH Werkzeugfabrik，DieBibliothek der Technik 342，Verlag Moderne Industrie，ISBN 978-3-68236-027-7。

crimping pliers of this type of different design are known, for example, from the documents DE 3708727C 2, DE 19713580C 2, DE 19753436C 2, DE 19802287C 1, DE 19807737C 2, EP 3208044 a1 and EP 2305428 a 1.

In contrast, such holding-down pliers (Presszange) are preferably used for mechanically fluid-tight connections in fluid technology, for example for connecting pipes to one another or to a fluid connection plug. In this case, plastic deformation of the pipes to be connected or of the so-called Fitting (Fitting) which ensures mechanical connection and fluid-tight sealing is achieved by means of the holding-down pliers. Exemplary embodiments of such holding-down pliers can be taken from documents DE 19709639 a1, DE 19834859C 2, DE 19924086C 2, DE 19924087C 2, DE 19963097C 1, DE 10346241B 3, EP 2995424 a 1.

DE 102007001235B 4 discloses a pressing pliers of this type, in which the jaws are coupled to one another in a pivotable manner by means of a pivot joint. The first hand lever is hinged on the swing hinge. The second handle bar is hinged to the first jaw at a curved end region. Finally, the third handle bar is disposed between the first and second handle bars in the open position of the j aws. The third hand lever is articulated in a curved end region on the pendulum support, the other end region of which is articulated on the second jaw. The first and third hand levers are coupled to one another in the region of their bends by means of respective pivotably articulated push levers, wherein a pivot pin for coupling the push lever to the third hand lever is fixed to the first hand lever. In order to bring about the closing movement of the jaws, the three levers can use different knee lever drives optimized with regard to force and pivoting for the respective partial closing strokes in the following manner in two successive partial closing strokes: during the first partial closing stroke, a pivoting movement of the third hand lever in the direction of the first hand lever is effected. In this case, the joint between the end region of the third hand lever and the pendulum support forms the knee lever of the first knee lever transmission formed in this way. At the end of the first partial closing stroke, the first hand lever and the third hand lever are oriented parallel to one another, and the first knee lever transmission and the first hand lever and the third hand lever are secured by the user's hand surrounding the two hand levers or by a suitable switching device. During the second, subsequent partial closing stroke, pivoting of the second hand lever in the direction of the first hand lever and the third hand lever is effected. In this case, the second toggle mechanism acts on the other jaw. In this second toggle mechanism, the toggle lever is formed by a pressure lever, while the other toggle lever is formed by a curved end region of the second hand lever, and the toggle connection is formed by a pivot bearing between the pressure lever and the second hand lever. Thus, the three hand levers are used to ensure different partial closing strokes of the j aws by means of different closing movements of the sub-combinations of the three hand levers, respectively.

US 3688553 relates to a clamp for clamping a joint for a pipeline system. A die with a circular cross section in the closed state is constructed from three die parts which each delimit a partial circumference of the circular cross section of the die. The two pivoting jaws, which are pivotably mounted on the jaw in the form of a housing plate, form a first die part and a second die part, wherein the die parts each form four parts of a die which is circular in the closed state. A third die component is provided by the ram, which third die component constitutes a semicircle of circular cross-section in the closed state of the die. In the first embodiment of the holding-down clamp, the two hand levers are articulated in their end regions on the push lever by means of pivot pins. In addition, the end regions of the pulling webs are each hinged to the handle lever at a distance from the hinge, the other ends of the pulling webs in turn being hinged to the housing plate of the pliers head. The movement of the ram in the closing direction of the die can thus be achieved by means of the mutual pivoting of the levers. The slide bar has an operation surface that is inclined with respect to a sliding direction of the slide bar. Rollers mounted on the end regions of the pressure jaws roll on these operating surfaces. The sliding movement of the slide rod caused by the closing movement of the hand rod thus causes on the one hand a movement of the third die part, which is formed by the slide rod, in the sliding and closing direction and, via the operation by the operating surface of the slide rod and the rolling contact of the rollers with the operating surface, a closing movement of the pressure jaws. The position of the actuating surface is selected in such a way that the connecting piece is initially pressed to an elongated cross section by the pressing jaw, and the die part formed from the slide rod is not brought into operative connection with the connecting piece until the closed position of the pressing jaw is reached, and the previously caused elongated cross section of the connecting piece is pressed to a predetermined circular cross section. With the second embodiment, no operating surface of the slide is used, so that the pressure jaw is not operated by contact with the operating surface using the rollers of the pressure jaw, so that only the third die component, which is constructed from push rods, is operated by means of the swinging of the hand levers relative to one another. For this embodiment, a third hand lever is provided, which is angled in the end region arranged in the jaw. In the region of the corner piece, the third hand lever is articulated to the pressure jaw by means of a pivot pin. The free end region of the corner piece is connected to the actuating tab in a pivotable manner by means of a pivot pin. The actuating tab is in turn articulated in a further end region by means of a pivot pin to a further pressing jaw. The pivot pin coupling the third hand lever to the actuating tab is guided in the elongated hole of the slide lever. In order to perform the working stroke for pressing the joint, the two hand levers and the third hand lever are opened, so that the joint can be inserted into the mouth of the pressing jaw. The third hand lever is then closed, while the two hand levers continue to open. As a result of the closing movement of the third hand lever, the pressure jaws close and the joint deforms into an elongated pressure state. In the closed position of the third hand lever, a self-locking of the closed position reached by the third hand lever occurs. The two hand levers can now be pivoted, as a result of which the slide rod is moved and the joint is deformed into a predetermined circular cross section by the end faces of the slide rod.

Further prior art is known from DE 69319628T 2 and US 5012666A.

Disclosure of Invention

The object of the invention is to provide a manually operated pressing or crimping pliers that is characterized in the following aspects

-a force proportion relationship,

operating comfort and/or

Safety of operation

In particular with regard to the insertion and/or removal of a workpiece into and/or out of a clamping or crimping tool.

According to the invention, the object of the invention is achieved by the features of the independent claims. Further preferred embodiments according to the invention result from the dependent claims.

The invention relates to a clamping or crimping tool of basically any type of construction (see also the initially mentioned prior art), provided that it has a clamping part with a clamping lever and a clamping jaw. The holding jaw part can be designed in one piece or in multiple pieces. Furthermore, the pressing or crimping pliers according to the invention have a hand lever. The hand lever is coupled with the movable jaw through a driving mechanism. The drive mechanism can be designed as any desired transmission connection with a suitable increase or decrease in force and displacement transmission ratio. The handle lever is coupled to the movable jaw via a drive in such a way that a closing movement of the jaws can be initiated by pivoting the handle lever in the direction of the fixed lever. With such a closing movement of the movable jaw, a crimping or pressing of the workpiece between the stationary jaw and the movable jaw (in particular in the region of the die held or formed by the jaws) is achieved.

The invention surprisingly proposes that the pressing or crimping pliers (in addition to the fixed-hand lever and the hand lever) be equipped with a further lever. The further rod is coupled to the movable jaw by a drive connection. The coupling by the drive connection is here: so that pivoting by means of the additional lever can bring about an opening movement of the j aws into the insertion and/or removal position.

Within the framework of the invention, it is possible, for example, for the movement of the further lever to be permanently coupled to the movement of the manual lever, so that the manual lever and the further lever, when one of the two levers is actuated, undergo the same pivoting movement or undergo different pivoting movements with a fixedly predefined or structurally predefined, changed transmission ratio. However, it is also possible for the movement of the further lever to be decoupled from the movement of the handle lever over part of the stroke or over the entire stroke, so that the further lever can be pivoted without the handle lever being pivoted (and/or vice versa).

According to the invention, different rods are provided which can be used for different purposes within the framework of the invention: since the manually operated hand lever can bring about the pressing or pressing of the workpiece by the closing movement of the jaws, the manual operation of the further lever can be used to bring about the opening movement of the jaws into the insertion/removal position, in which the insertion and/or removal of the workpiece is achieved or simplified.

Within the framework of the invention, the further lever is preferably arranged in the gripping region of the hand surrounding the fixed and/or movable hand lever or the fingers of the hand, so that, for example, without any grip or with minimal expenditure of the hand, on the one hand, the actuation of the hand lever can be initiated for the purpose of causing a closing movement of the jaws for crimping or pressing on a workpiece, and on the other hand, the opening movement of the jaws into the insertion/removal position can be caused by the actuation of the further lever.

Within the framework of the invention, the additional rod can have any shape (for example linear or curved), have any length and/or be arranged at any position on the pressure or crimping pliers. In one embodiment of the press or crimping pliers, the further lever is an additional hand lever which is arranged between the fixed hand lever and the hand lever. This configuration utilizes the intermediate space which is always present between the fixed hand lever and the hand lever for arranging the additional hand lever. In this case, the additional hand lever and the hand lever swing in the same swing plane. The end region of the additional lever facing away from the jaw of the pressing or crimping pliers can be located in the region of the pivot circle of the corresponding end region of the hand lever or inside or outside the latter.

The operating movement mechanism for operating the additional hand lever and for transmitting the movement of the additional hand lever to the movable jaw can be arbitrary. The invention proposes that the additional lever is coupled to the movable jaw via a drive connection such that pivoting the additional lever in the direction of the fixed lever causes an opening movement of the jaw. Without the invention being restricted thereby, the possible effects of this configuration are illustrated with reference to the following examples: if the inner surface of the hand of the user lies against the outer surface of the fixed lever, the user can grip the additional lever with at least one finger and can pivot the additional lever in the direction of the fixed lever by means of the force of the at least one finger, as a result of which an opening movement of the jaw is achieved and an insertion and/or removal position can be brought about and a workpiece can be inserted into or removed from the jaw or the associated die. In this case, if a closing movement of the j aws for pressing or pressing against a workpiece is to be effected, the user removes a finger from the additional handle and places it from the outside against the handle bar, while the inner hand surface can still be supported from the outside on the stationary handle bar. In this regard, the user can apply the necessary force to the handle bar with his fingers to cause the closing movement of the j aws for crimping or pressing against a workpiece.

The additional handle bar is coupled to the movable jaw by means of a drive connection which can be configured as any transmission connection with increasing or decreasing transmission ratio. In one configuration of the pliers, the drive connection is a fixed connection of the additional handle to the movable jaw. In this case, it is possible, for example, for the additional lever to be designed as a one-piece component with the movable jaw, or for the additional lever and the movable jaw to be designed as separate components which are connected to one another directly or indirectly and releasably or unreleasably, but in any case by means of a fixed connection. In this way a structurally simple but reliable drive connection can be provided.

It is further proposed that the pressing or crimping pliers have an opening spring. The opening spring acts (directly or indirectly) on the movable j aw and/or the movable handle bar such that the movable j aw and/or the movable handle bar automatically move from the closed position in an opening direction. It is particularly advantageous if the pressing or crimping pliers have already reached a closed position in which the workpiece is completely crimped or pressed. In this case, when the manual force applied to the fixed and movable levers is reduced or eliminated, an automatic opening of the movable jaw and/or the movable lever can be achieved by means of the opening spring, which improves the operating comfort of the press or crimping pliers.

It is also possible for the pressing or crimping pliers to have a closing spring. The closing spring acts on the movable jaw and/or the further lever such that the movable jaw is loaded in the closing direction and/or the further lever is automatically moved from the closed position in the direction of the open position. The spring force generated by the closing spring and acting on the movable jaw in the closing direction can be used, for example, to reduce or eliminate the user loading the additional lever after the setting and/or removal position has been brought about by actuating the additional lever and the workpiece has been inserted into the die, in which case the closing spring force acts on the movable jaw in the closing direction. The workpiece is thus clamped between the two jaws by the closing spring force, whereby the workpiece can be fixed in the position and/or orientation between the dies, which was previously caused manually. It may be possible to readjust the workpiece in the die so secured between the jaws by: the user presses the workpiece into another orientation and/or position, which in this case causes a spring-up (affedern) of the j aws against the action of the closing spring or also a frictional sliding movement of the workpiece relative to the die loaded by the closing spring.

Within the framework of the invention, the opening spring and/or the closing spring can be formed by a single spring or also by a plurality of springs, which can be arranged in parallel or in series. The at least one spring is made of any material (e.g., metal, plastic, elastomer material, composite material). This can be a compression spring, a traction spring, a rotation angle spring, a torsion spring or any other type of spring. The at least one spring can be integrated into the force flow of the pressure or crimping pliers at any desired point. At least one spring having a linear or non-linear spring characteristic can be used.

In one embodiment of the press-on or crimping pliers, the closing spring is articulated on the stationary jaw part by means of a spring base point, and the closing spring is articulated on the movable jaw part by means of a further spring base point. Alternatively or cumulatively, the opening spring can be articulated on the stationary jaw part by means of a spring base point, while the opening spring is articulated on the hand lever by means of another spring base point.

The invention also includes embodiments in which the opening spring and the closing spring are constructed from a single, integral spring element, see in particular the non-prepublished european patent application EP 18166729.6.

The invention includes embodiments in which the drive mechanism for coupling the lever to the movable j aw is permanently active, so that, due to the coupling produced by the drive mechanism, the lever is also moved as a result of the movement of the movable j aw caused by the further lever. In another embodiment of the press-on or crimping pliers, it is provided that the drive mechanism, by means of which the handle bar is coupled to the jaws, has play. The gap is limited by a stop. By means of the stops and the gaps, the following advantageous effects can be brought about here: during pivoting of the handle lever together with the closing movement of the jaws in the direction of the fixed lever (i.e. during pressing or pressing of the workpiece), the drive element of the drive mechanism bears against the stop, as a result of which the play is not effective and a play-free transmission of the pressing or pressing force is possible. Conversely, if the other lever is pivoted into the insertion and/or removal position with the opening movement of the j aws, the drive element will move away from the stop, so that a movement is achieved which makes the most of the play. As a result, the operating lever does not follow the movement for the opening movement for the insertion and/or removal position by operating the further lever, despite the opening movement of the j aws, which may simplify the operation of the pressing or crimping pliers.

The gap can be provided in any size, so that the stated effect occurs only for a part of the movement or for the entire movement stated. The invention proposes that the gap is at least so large that in the open position of the hand lever the movable j aw can be moved from the closed position into the open position in relation to and caused by the position of the further lever without moving the hand lever out of its open position. In this way it can be ensured that no changes in the swing angle of the hand lever occur during the entire operation of the further lever.

The invention further provides that the opening spring exerts no opening spring force on the movable jaw in the open position of the operating lever, as a result of which the closing spring force of the closing spring is not reduced by the action of the opening spring. On the other hand, the closing spring applies a closing spring force to the movable jaw. The closing spring force is minimal in the closed position of the further lever and the closing spring force is maximal in the open position of the further lever. In this case, the closing spring can be relaxed in the closed position of the further lever, so that the minimum closing spring force is zero. However, it is also possible that in the closed position of the further lever, the closing spring force is already greater than zero, so that the closing spring is always preloaded. In this way, the closing spring can ensure, for example, that a small workpiece is held between the dies with a sufficient closing spring force when the workpiece is inserted into the dies formed by or carried by the j aws.

Within the framework of the invention, by holding the workpiece by means of the closing spring force of the closing spring, it may not be necessary to use so-called positioners or positioning devices in order to ensure the correct position or orientation of the workpiece relative to the die.

The clearance and the limiting stop can be provided in any desired manner. In one embodiment of the press-on or crimping pliers, the drive mechanism has an elongated hole which provides the gap. In this case, the stop is formed by an end region of the slot. This configuration shows a simple but reliable possibility for providing clearance and stop.

As previously explained, any drive mechanism can be used in the crimping pliers. Preferably, the drive mechanism is a knee lever transmission. In this case, the play and the stop can be provided in the knee lever mechanism in the following manner: the toggle lever mechanism has a pivot pin, which can be a pivot pin of the joint for the toggle lever or a pivot pin for forming a toggle joint. In this case, the pivot pin can be received in the slot, whereby the required play and stop can be provided.

In a further embodiment of the press-on or crimping pliers, it is provided that the press-on or crimping pliers have a positive locking device. Positive locking devices are used to maintain the j aws in the closed position immediately reached during crimping or pressing of a workpiece so that the j aws do not undesirably open when temporarily removed from the pressing or crimping pliers due to reduced operating force or hand movement by the user during the pressing or crimping stroke. On the other hand, the positive locking means should be able to open the pressing or crimping pliers again as the closed position is reached. Within the framework of the invention, the action and configuration of the positive-locking device can be adapted to the current requirements in particular as follows: the positive locking device does not fix the position of the movable jaw over the entire possible range of motion of the movable jaw. More specifically, the positive locking device does not lock the movement of the movable j aw caused by the additional lever, but instead locks the movement of the movable j aw caused by the operating lever. In other words, the positive locking device is not effective when the removal and/or insertion position is to be brought about by actuating the further lever, so that an opening movement is achieved, whereas the positive locking device is to effect a closing movement for crimping or pressing the workpiece by simultaneously securing the closed position reached there.

Advantageous embodiments of the invention emerge from the claims, the description and the drawings. The advantages of the features or of the combinations of features mentioned in the description are merely exemplary and can alternatively or cumulatively function without necessarily forcing the achievement of these advantages by embodiments according to the invention. The disclosure regarding the original application documents and patents applies, without altering the subject matter of the appended claims: further features emerge from the figures (in particular the illustrated geometry and the relative dimensions of the various components to one another and their relative arrangement and functional connection). Features of different embodiments of the invention or combinations of features of different claims may also be different from the chosen ones of the claims and be presented here. This also relates to the features which are shown in the individual figures or mentioned in the description thereof. These features can also be combined with the features of different claims. The features mentioned in the claims can also be used in other embodiments of the invention.

The features mentioned in the claims and in the description are to be understood as follows in terms of their quantity: there is precisely this number, or a number greater than the number mentioned, without the adverb "at least" being used explicitly. For example, when referring to a spring, it is to be understood that there is exactly one spring, two springs or more springs. These features can be supplemented by other features or be unique features, from which the respective product can be composed.

Reference signs included in the claims do not limit the scope of the subject matter protected by the claims. They are only for the purpose of making the claims easier to understand.

Drawings

The invention will be further elucidated and described with reference to a preferred embodiment shown in the drawings.

Figure 1 shows an exploded view of a crimping tong.

Figure 2 shows the crimping pliers according to figure 1 in a partially disassembled state in a top view.

Fig. 3 to 9 show the crimping pliers according to fig. 1 and 2 in different operating positions (fig. 3: storage position; fig. 4: insertion position; fig. 5: holding position; fig. 6: initial position; fig. 7: closed position; fig. 8: jaws in open and closed positions of the hand lever; fig. 9: removal position).

Fig. 10 shows a spatially exploded view of the crimping pliers according to fig. 1 to 9 with additional electronics components.

Figures 11 and 12 illustrate another embodiment of the crimping pliers in top view in different partially disassembled states.

FIG. 13 shows another embodiment of a crimping tong in a top view, partially disassembled.

FIG. 14 shows another embodiment of a crimping tong in a top view, partially disassembled.

Within the framework of the description of the figures, the same reference numerals are used for the different embodiments, in the case of identical or similar structural elements with respect to geometry and/or function. In this case, if a plurality of structural elements corresponding in terms of function and/or geometry are contained in one embodiment, these are denoted in part by the same reference numerals, wherein these are distinguished here in a supplementary manner by a), b) … …. Reference signs with or without supplementary letters can be used here in this case.

Detailed Description

The closed position of the hand lever or the additional hand lever represents a position in which the hand lever or the additional hand lever is pivoted to the greatest extent in the direction of the fixed hand lever. The corresponding swinging movement is denoted as closing movement or closing stroke. Conversely, the open position and the opening movement represent a position of the hand lever or the additional hand lever in which the hand lever or the additional hand lever (preferably to the greatest extent) is pivoted away from the fixed hand lever, or a corresponding movement for bringing about the open position. With respect to the movable jaw portion and the movable jaw, the closed position is understood to mean a position in which the jaws are maximally closed, i.e. the workpiece arranged in the die is fully pressed or crimped. A closing movement means here a movement in the direction of the closed position. The open position of the movable j aws represents a position of the j aws that is open relative to the closed position, and the opening motion represents movement of the j aws in the direction of the open position. Possible open states are in particular:

an insertion and/or removal position in which the jaws are open to such a great extent that the jaws formed by the die are open to such a great extent that workpieces which have not been pressed or crimped can be inserted into the die with a clearance and the pressed or crimped workpieces can be removed from the die with a greater clearance,

a storage position in which the opening of the jaws is reduced relative to the insertion and/or removal position and the pressing or crimping pliers occupy this storage position without force and without a workpiece inserted into the die (but wherein the storage position of the jaws can also correspond exactly to the closed position of the jaws), and

an initial position in which the opening of the die is reduced relative to the insertion and/or removal position, but the opening of the die is larger than the opening in the storage position, and in which the die is pressed against the workpiece by the closing spring force and fixes the workpiece before the start of the crimping or pressing of the workpiece.

Starting from the initial position, the user can actuate the lever to perform the actual pressing or crimping stroke, which (possibly after a certain idle stroke) extends from the initial position to the closed position.

For the embodiment of the crimping pliers 1 shown in fig. 1 to 9, the pliers have a fixed jaw part 2 and a movable jaw part 3. The stationary jaw part 2 has a stationary jaw 4 and a stationary handle bar 5, which are firmly connected to each other. The movable clamp portion 3 has a movable clamp jaw 6.

The stationary jaw part 2 and the movable jaw part 3 are swingably connected to each other by a swing bearing 7.

The hand lever 9 is pivotably hinged to the stationary jaw part 2 via a pivot bearing 8. The handle lever 9 is coupled to the moving jaw part 3 via a drive mechanism 10, so that a pivoting movement of the moving jaw part 3, and thus of the moving jaw 6, relative to the fixed jaw 4 can be achieved by means of a manual pivoting movement of the handle lever 9 relative to the fixed lever 5.

It is possible to configure the j aws 4, 6 directly as dies for pressing or crimping a workpiece. For the exemplary embodiment shown, however, the jaws 4, 6 carry a die by means of suitable receptacles, wherein the receptacles and the die are configured here in accordance with patent document US 6053025A, the disclosure of which is incorporated by reference.

For the exemplary embodiment shown, the drive mechanism 10 is designed as a knee lever 11. As can be seen in particular in fig. 3, the knee lever drive 11 has a knee lever 13 in the form of a push lever 12, while a further knee lever 14 is formed by a bent end region of the hand lever 9. The two toggle levers 13, 14 are connected to one another in a pivotable manner by a toggle joint 15. The toggle lever 14 is formed here by a curved material region of the hand lever 9 between the pivot bearing 8 and the toggle joint 15. The end region of the knee lever 13 facing away from the toggle joint 15 is articulated on the caliper part 3 by means of a pivot bearing 16.

As can be seen in particular in fig. 3, the knee levers 13, 14 in the storage position 55 form a toggle angle which lies in the range from 90 ° to 120 °. The toggle angle can be increased by shifting the hand lever 3 from its open position into its closed position, wherein the toggle angle in the closed position lies, for example, between 170 ° and 180 °, so that as the closing movement approaches the extended position, a large force development of the toggle lever mechanism 11 associated therewith ensues.

The following illustrates alternative design possibilities of the crimping pliers 1, which can be used alternatively or cumulatively:

for the embodiment according to fig. 1 to 9, the jaw parts 2, 3 are each constructed in a plate-structure manner, here having two plates, namely two stationary jaw plates 17a, 17b and moving jaw plates 18a, 18b, respectively. Here, the moving tong plates 18a, 18b are arranged directly adjacent to each other and between the two fixed tong plates 17a, 17 b. The moving jaw plates 18a, 18b have the same geometry (in particular the outer geometry and the bore geometry) here, while the stationary jaw plates 17a, 17b differ for the embodiment shown in that the jaw plate 17a is constructed with a stationary lever part 19, whereas in the stationary jaw plate 17b there is no corresponding stationary lever part.

For the exemplary embodiments shown in fig. 1 to 9, the pivot bearings 7, 8, 16 and the toggle joint 15 are each formed by means of pivot pins 20, 21, 22, 23, which are each held in suitable bores while achieving a freedom of pivoting of the components, which are connected to one another by the pivot bearings 7, 8, 16 or the toggle joint 15.

For the embodiment shown in fig. 1 to 9, the curved bar 13, constituted by the pressure bar 12, is located outside the fixed jaw 17, while the curved bar 14 is arranged inside the fixed jaw 17a, 17 b. For this reason, the swing bolt 23 of the toggle joint 15 passes through the stationary jaw plates 17a, 17 b. In order not to impede the movement of the pivot pin 23 during the actuation of the crank drive 11, the stationary tong plates 17a, 17b have elongated holes 24a, 24b which are bent in accordance with the desired movement of the pivot pin 23. Accordingly, the stationary jaw plate 17 also has elongated holes 25a, 25 so as not to impede the movement of the swing bolt 22 and to effect movement of the moving jaw portion 3 during operation of the knee lever transmission 11.

For the embodiment shown in fig. 1 to 9, there are two handspike plates 26a, 26b arranged directly adjacent to each other. The lever plate 26 extends in the same plane as the moving jaw plate 18. The moving jaw plate 18 and the lever plate 26 are rigidly connected to each other, respectively. The same applies to the stationary jaw plate 17.

For the embodiment shown in fig. 1 to 9, there are two curved levers 13a, 13b in the form of two pressure levers 12, which are coupled to each other by means of swivel bolts 22, 23 and are arranged externally on different sides to the stationary jaw plate 17.

For the embodiment shown in fig. 1 to 9, the moving-caliper plate 18a, 18b is constructed in two parts, which for the moving-caliper plate 18a is exemplarily explained as: the moving-caliper plate 18a has a carrier plate 27 with a hole for the pivot bolt 21 of the pivot bearing 8. In the end region facing the binding head, the carrier plate 27 has a fastening region 28 for the jaw plate 29. For the exemplary embodiment shown, the fastening of the jaw plate 29 in the fastening region 28 on the carrier plate 27 is effected by two fastening bolts 30, 31 arranged at a distance from one another, which are received in corresponding bores of the carrier plate 27 and the jaw plate 29. The longitudinal axes of the fixing bolts 30, 31 are aligned in the assembled state approximately tangentially to the pivot axis of the pivot bearing 8. The carrier plate 27 and the jaw plate 29 are each roughly of an L-shaped design, wherein the two short legs of the L overlap to form the fastening region 28 and the long legs of the L are arranged parallel to one another. The jaw plates 29 are externally attached to the carrier plate 27 such that the jaw plates 29 extend in the same plane as the fixed jaw plates 17a, 17 b.

For the embodiment according to fig. 1 to 9, the positive locking device 32 acts on the knee lever drive 11. The instantaneous position of the movable j aw 6 during the pressing or crimping stroke should be secured against opening by means of the positive locking device 32, which is effected in the individual stages of the positive locking device 32. If the closed position of the movable j aw 6 is reached, the securing action of the positive locking device 32 is lost, so that the movable j aw 6 can be opened again. For the embodiment shown, the hand lever 9 (here the hand lever plates 26a, 26b) has a locking tooth 33. A locking element 34, which is mounted pivotably on the clamping jaw part 2 and is acted upon in the locking direction by a spring 35 of the positive locking device 32, engages into the locking toothing 33. The geometry of the locking teeth 33 and the locking element 34 and the action of the spring 35 are coordinated in such a way that the locking element 34 can be moved along the locking teeth 23 in a ratchet-like manner for the closing movement of the hand lever 9, while it can be engaged in a locking manner in the locking teeth 33 for the opening movement of the hand lever 9. As the closed position of the hand lever 9 is reached, the locking piece 34 is folded over such that a further mating surface of the locking piece 34 interacts with the locking toothing 33, whereby an opening movement of the hand lever 9 is achieved.

For the embodiment according to fig. 1 to 9, the moving jaw part 3 is loaded in the closing direction by a closing spring 36. The closing spring 63 is supported on the stationary jaw part 2 with spring base points 37 (here by means of pegs 38 carried by the stationary jaw part 2). A further spring base point 39 is supported on the moving jaw part 3 (here by a peg 40 carried by the moving jaw part 3).

For the embodiment according to fig. 1 to 9, two closing springs 36 are provided which act in parallel on the moving-jaw part 3. Here, two closing springs 36 are arranged externally to the two stationary jaw plates 17. The pin 40 thus extends through the elongated holes 41a, 41b of the stationary jaw plate 17, which are arranged and shaped such that they do not interfere with the movement of the pin 40 in accordance with the swinging movement of the moving jaw portion 3.

For the embodiment shown in fig. 1 to 9, the opening spring 42 acts on the hand lever 9. The opening spring 42 is supported on the stationary jaw part 2 by means of spring base points 43 (here by means of pegs 44). A further spring base 45 is supported (here by a pin 46) on the hand lever 9, which is realized eccentrically with respect to the pivot axis of the pivot bearing 8 in such a way that the opening spring 42 loads the hand lever 9 in the opening direction.

For the embodiment shown in fig. 1 to 9, there are two opening springs 42 acting in parallel on the hand lever 9 and arranged outside the stator plate 17. For this reason, the pins 46 pass through the elongated holes 47a, 47b of the stationary jaw plates 17a, 17b, which are arranged and shaped so that they do not interfere with the swinging of the hand lever 9. As the open position of the hand lever 9 is reached, the pin 46 can rest against the end region of the elongated hole 47, whereby the open position of the hand lever 9 is predetermined and the hand lever 9 cannot be opened any further.

For the embodiment shown in fig. 1 to 9, the moving-jaw part 3 has a further lever 48, which is configured here as an additional hand lever 49. The additional lever 49 is designed here as a bar-shaped (e.g. slightly curved) projection of the movable jaw 18. The additional handle lever 49 is arranged between the fixed handle lever 5 and the manual handle lever 9, wherein the pivot area of the additional handle lever is, for example, at least 2 times, at least 3 times, at least 4 times, at least 5 times or even at least 8 times smaller than the pivot area of the manual handle lever 9. In the closed position of the hand lever 9 (see fig. 7), the additional hand lever 49 is arranged approximately centrally between the hand lever 9 and the hand lever 5. For the exemplary embodiment shown, the additional lever 49 is shorter than the hand lever 9, or the pivot circle of the end region of the additional lever 49 is located within the pivot circle of the hand lever 9, which is not necessarily the case. The additional hand lever 49 is constructed and arranged such that it can be grasped and operated by a hand (placed on the hand lever 5 from the outside) with the fingers of the hand (at least one forward finger). It should be understood that the number of fingers that can be used to operate the additional lever 49 can vary depending on the length of the additional lever 49.

If the drive mechanism 10 (here the knee lever transmission 11) is designed without play, each position of the movable hand lever 9 is associated one-to-one with the associated position of the additional hand lever 49 and each position of the movable jaw part 3 is associated one-to-one with the associated position of the movable jaw 6. To release this specific assignment, a gap 50 is provided in the drive mechanism 10 (here the knee lever 11). For the illustrated embodiment, the gap 50 is provided by: the knee levers 13, 14 are not only coupled to one another in the region of the toggle joint 15 with a degree of freedom of pivoting, but the knee levers 13, 14 also have a degree of freedom of translation in the region of the toggle joint 15. For this purpose, the toggle 13 (here the pressure lever 12) has an elongated hole 51 in the region of the toggle 14, in which the pivot bolt 23 is guided so as to be movable. The length of the elongated hole 51 is predetermined here by the gap 50. The end region of the elongated hole 51 forms a stop 52 for the pivot pin 23 of the knee lever mechanism 11. During the pressing or crimping stroke, the pivot pin 23 bears against the stop 52 for transmitting the pressing or crimping force.

The function of the crimping pliers 1 according to the exemplary embodiment shown in fig. 1 to 9 is now explained with reference to the different operating states of the crimping pliers 1 shown in fig. 3 to 9:

figure 3 shows the crimping pliers 1 without the application of operating force by the user and without the workpiece being placed in the dies 53, 54. Due to the closing spring 36, the movable jaw part and the movable jaw 6, or the dies 53, 53 thereof, are in the closed position, so that the jaws are open. This closed position is associated with the open position of the additional lever 49. The closing spring 36 is in a state of minimum closing spring force. In the closed position, the closing spring force can be zero or it can already be greater than zero. If the drive mechanism 10 does not have the gap 50, the closed position of the j aws 4, 6 is associated with the closed position of the power handle 9. However, since the gap 50 is provided here by the elongated hole 51 of the pressure lever 12, the opening spring 42 can move the hand lever 9 into the open position. In the operating position according to fig. 3, the opening spring 42 also has a minimum opening spring force acting in the opening direction. The operating position according to fig. 3 can also be denoted as the storage position 55.

The put-in and/or take-out position 56 according to fig. 4 can be brought about from the storage position 55 according to fig. 3. For this purpose, the additional lever 49 is pivoted manually from its open position according to fig. 3 into its closed position according to fig. 4. This is accompanied by a corresponding swinging of the moving jaw part 3, whereby the moving jaw part and the moving jaw 6 occupy the open position, i.e. the insertion and/or extraction position 56. Due to the gap 50, the operating lever 9 can be held in its open position. During the pivoting of the additional lever 49, the pivot bolt 23 slides along the elongated hole 51. The closing spring force of the closing spring 36 increases as the additional lever 49 pivots. Since the hand lever 9 does not swing, the opening spring force of the opening spring 42 does not change. In the insertion and/or removal position 56 thus produced, the workpiece 57 can be introduced into the jaws and between the dies 53, 54, as indicated in fig. 4.

If the manual force manually applied to the additional hand lever 49 is removed, an automatic movement of the additional hand lever 49 in the opening direction is effected due to the closing spring 36, which automatic movement follows the closing movement of the moving-clamp part 3. This closing movement is continued until the holding position 58 according to fig. 5 is reached. In the holding position 58, the closing spring force exerted by the closing spring 36 on the moving jaw part 3 is supported by: the workpiece is clamped between the j aws 4, 6 or dies 53, 54. This clamping due to the closing spring force causes a fixing of the position and/or orientation of the workpiece 57 relative to the dies 53, 54. In order to pass from the insertion and/or removal position 56 according to fig. 4 into the holding position 58 according to fig. 5, the closing spring force of the closing spring 36 is reduced, wherein the closing spring force is still sufficiently high, even when small workpieces 57 are inserted, due to the design of the closing spring 36, to ensure that the position and/or orientation of the workpiece 57 is maintained. The opening spring force of the opening spring 42 continues to be constant. During the movement from the insertion and/or removal position 56 according to fig. 4 to the holding position 58 according to fig. 5, the pivot pin 23 moves along the elongated hole 51 by a partial stroke, the pivot pin 23 also being arranged at a distance from the stop 52 of the elongated hole 51. The remaining distance of the pivot bolt 23 from the stop 52 is related to the size of the workpiece 57 in the uncompressed or non-pressed state.

The user can now apply an operating force to the manual lever 9. From the holding position according to fig. 5, the operation of the hand lever 9 first causes an idle stroke in which the movement of the hand lever 9 is not linked to the movement of the moving jaw part 3. Instead, the spacing of the pivot pin 23 from the stop 52 is exceeded during the idle stroke, so that the abutment against the stop 52 is brought about at the end of the idle stroke of the pivot pin 23. Thus reaching the initial bit state 59 shown in fig. 6. During the idle stroke, the closing spring force of the closing spring 36 is constant, while the opening spring force of the opening spring 42 increases, so that the opening spring 42 has to be deflected by means of a manual operating force during the idle stroke.

Starting from the initial position 59 according to fig. 6, the actual pressing or crimping stroke can be carried out, at the end of which the closed position 60 according to fig. 7 is reached. The gap 50 is eliminated during the compression or crimp stroke. In the knee lever 11, the pivot pin 23 no longer has the translational freedom provided by the long hole 51 during the pressing or crimping stroke. Instead, the pivot pin 23 rests against the stop 52 for the purpose of force transmission in the toggle lever mechanism 11, wherein a pivoting movement in the region of the stop 52 and thus a pivoting movement of the toggle joint 15 is still possible. During the pressing or crimping stroke, a further loading of the opening spring 42 is achieved as a result of the pivoting of the hand lever 9. At the same time, a reduced loading of the closing spring 36 is achieved with an increased pivoting of the moving-clamp part 3. As the closed position 7 is reached, the workpiece 57 is fully compressed or crimped between the dies 53, 54.

In this case, if the hand force applied by the user is removed, the closed position of the j aws 4, 6 and the open position of the additional lever 49 remain unchanged as a result of the closing spring 36, whereby the closing spring force generated by the closing spring 36 also ensures that the workpiece 57 which is pressed between the j aws 4, 6 (here between the dies 53, 54) is clamped and cannot fall out of the dies 53, 54. The action of the opening spring 42 causes the hand lever 9 to swing from the closed position according to fig. 7 into the open position according to fig. 8. The gap 50 of the drive mechanism 10 is used during this movement. For the embodiment shown, this means that the pivot pin 23 moves away from the stop 52.

In this case, if the pressed or crimped workpiece 57 is to be removed from the crimping pliers 1, the additional lever 49 can be actuated to bring the movable jaw part 3 and the movable jaw 6 into the insertion and/or removal position 56 (see fig. 9).

If a positive locking device 32 is present in the crimping pliers 1, this positive locking device only produces a locking action during the idle stroke and/or the pressing or crimping stroke, so that the other, previously described movements are not impeded by the positive locking device 32.

It is possible that the intermediate space formed between the plates of the crimping pliers 1 (here the stationary jaw plate 17 and/or the movable jaw plate 18) is closed or sealed off outwards by a covering (for example made of plastic). For the exemplary embodiment shown here, the cover 61 is roughly of a T-shaped design and has a web 62 of vertical legs. The cover 61 is fixed to the caliper part 31 in the region of the web 62, which is achieved here by means of the fastening bolts 30, 31. The respective cover 63 extends in the outer end region of the stator plate 17. For the embodiment shown, the cover 63 has an outer fixing eye 64, the function of which is also described below.

For the embodiment shown in fig. 1 to 9, the crimping pliers 1 has only a mechanical pliers portion 65. For a modified embodiment, the crimping pliers 1 according to fig. 10 has an electronics unit 66 in addition to the mechanical pliers part 65. The configuration, the function, the coupling to the mechanical jaw part 65 and/or its energy supply and the wireless or wired communication of the electronic device structural unit 66 can be configured here in accordance with the non-prepublished european patent application EP 18173803.0, which is hereby incorporated by reference.

The electronics assembly unit 66 has a housing which is formed by two half-shell housing parts 67, 68, wherein a transparent cover disk 69 can also be arranged in the housing parts 67, 68 for forming a screen or a window of a display 70. A circuit board 71 is arranged in an intermediate space arranged between the housing, here the housing part 67, and the mechanical jaw part 65. The housing parts 67, 68 are latched, locked or pressed together by suitable connecting pins and connecting receivers and by means of the fastening eyelet 64.

The electronic device unit 66 can have a holding device 72, which comprises a battery or a rechargeable accumulator 73, for the electrical energy supply of the electronic device unit. For the embodiment shown, the holding device 72 is held on the clamping jaw part 2 (here in the region of the clamping lever part 19), which has already been shown in fig. 1 to 9, although this is not necessary here for a purely mechanical construction of the crimping clamp 1. The handle 74 can be moved onto the dead-hand lever part 19, where the holding device 72 is received in the inner space of the handle together with the battery 73. The handle 74 can be fastened to the clamping jaw part 2 (here to the clamping lever part 19), which can also be realized by a latching and/or locking connection (for example by means of a detachable connection), in that: for unlocking the handle 74, a button can be actuated, which can be arranged, for example, on the inner side facing the further handle lever 9. The battery or accumulator 73 can be replaced by removing the handle 47.

Fig. 11 and 12 show an exemplary embodiment of a crimping pliers 1 which, apart from the differences described below, corresponds essentially to the embodiment of the crimping pliers 1 according to fig. 1 to 9. However, the plunger 12 does not have the elongated hole 51, so that the drive mechanism 10 does not have the gap 50. As a result, the operating lever 9 is (further) pivoted in the opening direction for the purpose of changing the movable jaw 6 into the insertion and/or removal position 56 as the additional lever 49 is operated.

Unlike in fig. 1 to 9, for the exemplary embodiment shown in fig. 11 and 12, the closing spring 36 and the opening spring 42 are configured differently and integrated into the crimping pliers 1. The closing spring 36 and the opening spring 42 are designed here as an integral spring device 75, which is a U-shaped bending spring 76 having two resilient side legs 77, 78 connected to one another. The side legs 77 are supported in their free end regions on a support 79 which is constructed or held by the moving-jaw part 3. In this end region, the side leg 77 is additionally also supported on a support 80, which is constructed or held by the holding jaw part 2. The other leg 78 is supported in the end region on a support 81 which is constructed or held by the moving-jaw part 3. Furthermore, the side legs 78 are supported on a support 82 which is constructed or supported by the stationary jaw part 2. With this configuration, the following modified modes of action of the crimping pliers 1 result:

in fig. 12, the spring means 75 is supported on the stationary jaw part 2 between two support portions 80, 82 and is fixed thereto. This is therefore a stable equilibrium state. Operation of the additional handle 49 causes the support portion 79 to carry the side leg 77 while the side leg 78 continues to be supported on the support portion 82. The spring means 75 is thus compressed and generates a closing spring force. During this movement caused by the additional handle bar 49, the side leg 77 is released from the support 80 and the side leg 78 is released from the support 81. In the insertion and/or removal position achieved by the additional lever 49, therefore, the closing spring force generated by the spring device 75 acts, which moves the j aws 6 back into the initial position according to fig. 12. Thus, the clamping of the workpiece 57 is also achieved here, provided that the workpiece 57 is dimensioned so large that the clamping is achieved by means of the position of the j aws 6 which is open to a greater extent than in the initial position according to fig. 12.

If the actual pressing or crimping stroke is carried out by means of the hand lever 9, the support 61 follows the movement of the side leg 78, so that the side leg 78 is separated from the support 82. In contrast, during the crimping or pressing stroke, the side leg 77 is supported on the support portion 80, while the support portion 79 is spaced away from the side leg 77. The spring device 75 thus generates an opening spring force during the pressing or crimping stroke, which opening spring force can be used for the automatic opening movement caused by the spring device 75 into the initial position according to fig. 12 as the closed position is reached.

Fig. 13 also shows an embodiment of the crimping pliers 1 in which the drive mechanism 10 has no gap 50. In principle, the actuating mechanism of the crimping pliers 1 according to fig. 13 is constructed in accordance with the previously described exemplary embodiments. In this case, however, the manual lever 9 has a lever part 83 which acts on the closing spring 36 for moving from the initial position into the insertion and/or removal position, while the lever part 83 is able to act on the opening spring 42 for a pressing or crimping stroke which is carried out from the initial position into the closed position. The opening spring 42 and the closing spring 36 can each be brought by suitable stops on different sides only with the lever part 83 into the initial position.

The exemplary embodiment of the crimping pliers 1 shown in fig. 14 corresponds substantially to the exemplary embodiment shown in fig. 1 to 9. The further lever 48 is not, however, configured here as an additional lever 49 arranged between the two hand levers 5, 9. In contrast, for this embodiment, the further lever 48 extends outside the intermediate space between the two hand levers 5, 8. For the embodiment shown, a further rod 48 extends upwardly from the housing of the crimping tong 1, which is formed by the stator plate 17. In this case, the further lever 48 can be arranged and configured such that the further lever 48 can be operated by a finger (in particular a thumb) of a hand of the user resting on the hand-lever 5.

For the embodiment shown in fig. 1 to 9, the operating lever 9 is already in its open position for the storage position. This requires a correspondingly large installation space for the storage of crimping pliers 1. If this should be avoided, in other corresponding configurations the hand lever 9 can be latched or locked in the closed position (or also in other positions), wherein the latching position can be released by the user exerting a sufficient actuating force on the hand lever 9, or the hand lever 9 can be automatically transferred into the open position by the action of the opening spring, also by unlocking the locking device.

List of reference numerals

1 crimping pliers

2 fixed jaw part

3 moving clamp part

4 fixed jaw

5 fixed handle bar

6 move pincers jaw

7 oscillating bearing (fixed clamp part-movable clamp part)

8 oscillating bearing (hand lever-fixed clamp part)

9 hand lever

10 drive mechanism

11 curved bar transmission device

12 compression bar

13 curved bar (compression bar)

14 curved bar (hand lever)

15 toggle joint

16 oscillating bearing (pressure bar-dynamic clamp part)

17 fixed clipper plate

18 moving pliers plate

19 handle bar part

20 swing bolt (swing bearing 7)

21 swinging bolt (swinging bearing 8)

22 swinging bolt (swinging bearing 16)

23 swing bolt (toggle joint 15)

24 long hole (swinging bolt 23 for fixed clipper 17)

Slot 25 (swinging bolt 22 for fixed clipper 17)

26 hand lever plate

27 carrying plate

28 fixing area

29 jaw plate

30 fixing bolt

31 fixing bolt

32 positive locking device

33 locking tooth

34 locking piece

35 spring (forced locking device)

36 closing spring

37 spring base point (closing spring 36, supported on the stationary jaw part 2)

38 bolt (supporting spring base point 37)

39 spring base point (closing spring 36, supported on the moving clamp part 3)

Bolt 40 (base point of spring of support 39)

Slot 41 (for bolt 40)

42 opening spring

43 spring base point (opening spring 42, supported on the stationary jaw part 2)

44 bolt (supporting part spring base point 43)

45 spring base point (opening spring 42, supported on hand lever 9)

46 bolt (supporting part spring base point 45)

Slot 47 (for bolt 46)

48 additional rods

49 additional hand lever

50 gap

Long hole 51 (pressure bar 12)

52 stop (slotted hole 51)

53 die

54 die

55 storage state

56 put and/or take out bit states

57 workpiece

58 hold state

59 initial state

60 closed state

61 covering part (dynamic pliers plate)

62 spacer

63 cover (fixed clipper plate)

64 fixed eyelet

65 mechanical pliers part

66 electronic structural unit

67 housing part

68 housing part

69 cover plate

70 screen, display

71 Circuit board

72 holding device

73 cell

74 handle

75 spring device

76 bending spring

77 side leg

78 side leg

79 supporting part

80 support part

81 support part

82 support part

83 rod portions.