Pivoting pliers jaw in a design comprising plates and crimping pliers comprising a pivoting pliers jaw

Abstract

A pivoting pliers jaw (18) having a design including plates for manually actuated crimping pliers (1). The pivoting pliers jaw (18) which includes a supporting plate (23) at which on both sides pliers jaw plates (25) are held. The pliers jaw plates (25) form an accommodation for a die insert or support the accommodation. According to the invention the pivoting pliers jaw (18) is L-shaped. Bolts (27, 28) for mounting the pliers jaw plates (25) to the supporting plate (23) are arranged in a way such that a connecting axis of the longitudinal axes of the bolts (27, 28) have an orientation approximately perpendicular to a supporting plane (36) for the effective crimping force.

Claims

1. A pivoting pliers jaw comprising a) a supporting plate and b) a pliers jaw plate, which ba) forms or supports at least one accommodation for a die insert, bb) defines a supporting plane of the at least one accommodation for supporting a crimping force biasing the die insert, bc) is arranged with an overlap on one side of the supporting plate and bd) is fixed in a region of the overlap by a first bolt and a second bolt at the supporting plate, c) an angle between a connecting axis of longitudinal axes of the first bolt and the second bolt and the supporting plane in a pliers head plane being 90°±30°, d) the pliers jaw plate comprising a mounting leg and a pliers jaw leg, the mounting leg and the pliers jaw leg being arranged in an L-shape and e) the first bolt extending through a transitional region where the mounting leg transits to the pliers jaw leg and/or the second bolt extending through a free end region of the mounting leg.

2. The pivoting pliers jaw of claim 1 wherein the second bolt is a pivot bolt.

3. The pivoting pliers jaw of claim 1 wherein the at least one accommodation of the pliers jaw plate comprises a) two accommodations for supporting elements of a die insert which are arranged with a distance in a projection onto the supporting plane and by which at least a component of a crimping force biasing the die insert and having an orientation perpendicular to the supporting plane can be transferred from the die insert to the pliers jaw plate and/or b) a bore for a mounting screw by which it is possible to mount the die insert to the pliers jaw plate.

4. The pivoting pliers jaw of claim 1 wherein by the first bolt and the second bolt, the pliers jaw plate and a second pliers jaw plate are held on different sides of the supporting plate.

5. The pivoting pliers jaw of claim 4 wherein a thickness of the supporting plate in a region of the overlap equals a thickness of an accommodating space formed between the pliers jaw plates into which a die insert can be inserted.

6. Crimping pliers comprising a pivoting pliers jaw having a design comprising plates, the pivoting pliers jaw comprising a) a supporting plate and b) a pliers jaw plate, which ba) forms or supports an accommodation for a die insert, bb) defines a supporting plane of the accommodation for supporting a crimping force biasing the die insert, bc) is arranged with an overlap on one side of the supporting plate and bd) is fixed in a region of the overlap by a first bolt and a second bolt at the supporting plate, c) an angle between a connecting axis of longitudinal axes of the first bolt and the second bolt and the supporting plane in a pliers head plane being 90°±30°, d) the pliers jaw plate comprising a mounting leg and a pliers jaw leg, the mounting leg and the pliers jaw leg being arranged in an L-shape and e) the first bolt extending through a transitional region where the mounting leg transits to the pliers jaw leg and/or the second bolt extending through a free end region of the mounting leg, the crimping pliers further comprising a toggle lever drive actuated by hand levers or a drive, one toggle lever of the toggle lever drive being linked to the supporting plate.

7. The crimping pliers of claim 6 wherein the second bolt is a pivot bolt of the crimping pliers which supports the pivoting pliers jaw for being pivoted at a fixed pliers jaw, a pliers head or a fixed pliers part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention is further explained and described with respect to preferred exemplary embodiments illustrated in the drawings.

(2) FIG. 1 shows crimping pliers according to the prior art in a plan view on the pliers head plane.

(3) FIG. 2 shows the crimping pliers of FIG. 1 in a three-dimensional view.

(4) FIG. 3 shows crimping pliers modified according to the invention in a partially disassembled state and in a plan view onto the pliers head plane, the crimping pliers being in a partially opened operational state.

(5) FIG. 4 shows the crimping pliers of FIG. 3 in an assembled state and in a plan view onto the pliers head plane, the crimping pliers being in a closed operational state.

(6) FIG. 5 shows the crimping pliers of FIGS. 3 and 4 in an assembled state and in a plan view onto the pliers head plane, the crimping pliers being in an opened operational state.

(7) FIG. 6 shows the crimping pliers of FIGS. 3 to 5 in an assembled state and in a three-dimensional view, the crimping pliers being in a partially opened operational state.

(8) FIG. 7 shows a three-dimensional exploded view of another embodiment of crimping pliers.

(9) FIG. 8 shows a three-dimensional view of the crimping pliers of FIG. 7.

(10) FIG. 9 shows the crimping pliers of FIGS. 7 and 8 in a plan view onto the pliers head plane in a partially disassembled state.

DETAILED DESCRIPTION

(11) FIGS. 1 and 2 show crimping pliers 1 according to the prior art, in particular according to the publication DE 19 802 287 C1. The crimping pliers 1 comprise a fixed pliers part 2, a movable pliers part 3 and a toggle lever drive 4 which comprises a movable hand lever 5. The fixed pliers part 2 here integrally forms a fixed hand lever 6 and a fixed pliers jaw 7.

(12) The toggle lever drive 4 comprises toggle levers 8, 10. The toggle lever 8 is a pressure lever 9. The toggle lever 10 is formed by the front end region of the movable hand lever 5. The toggle levers 8, 10 are linked for being pivoted to each other by a toggle joint 11. The toggle joint 11 is embodied as a pivot joint 12 comprising a pivot bolt 13. The end region of the toggle lever 8 facing away from the toggle joint 11 is linked by a pivot joint 14 comprising a pivot bolt 15 to the fixed pliers part 2. The toggle lever 10 and so the movable hand lever 5 is linked by a pivot joint 16 comprising a pivot bolt 17 to the movable pliers part 3. The movable pliers part 3 is here embodied as a movable pivoting pliers jaw 18.

(13) The pivoting pliers jaw 18 is supported for being pivoted by the fixed pliers part 2. This is provided by a pivot joint 20 comprising the pivot bolt 19. It is possible to pivot the pivoting pliers jaw 18 towards the fixed pliers jaw 7 with a pivoting movement of the movable hand lever 5 towards the fixed hand lever 6 under actuation of the toggle lever drive 4 by an actuation force applied by the toggle lever drive 4 in the region of the pivot joint 16 to the pivoting pliers jaw 18.

(14) In this way a crimping stroke is run through. The fixed pliers jaw 7 and the movable pivoting pliers jaw 18 in the region of a bit of tongues 21 each form recesses 22a, 22b for a die insert which is here not shown.

(15) The pivoting pliers jaw 18 comprises a supporting plate 23. The pivot joint 20 is partially formed by the supporting plate 23. For this purpose it is possible that the supporting plate 23 comprises a through bore for accommodating the pivot bolt 19. On both sides of the supporting plate 23 pliers jaw plates 25a, 25b are arranged having overlaps 24a, 24b. In the region of the overlaps 24a, 24b the supporting plate 23 and the pliers jaw plates 25a, 25b are mounted to each other by a first bolt 27 and a second bolt 28. The bolts 27, 28 extend vertically to the extensional plane of the supporting plate 23 and the pliers jaw plates 25a, 25b as well as to a pliers head plane 62 which corresponds to the drawing plane of FIG. 1. The bolts 27, 28 extend through aligned bores of the supporting plate 23 and of the pliers jaw plates 25. The bolts 27, 28 are here secured by securing rings 29, 30.

(16) For the shown embodiment the supporting plate 23 has approximately a triangular shape (here with rounded corners). The pivot joint 16 is arranged in the region of the in FIG. 1 right corner of the supporting plate 23 so that here the supporting plate 23 comprises a bore. In the region of the in FIG. 1 upper edge the supporting plate 23 comprises the pivot joint 20 so that here the supporting plate 23 comprises a corresponding bore. The overlap 24 is arranged in the region of the part of the triangle which in FIG. 1 is the lower left part. The first bolt 27 is arranged in the left corner of the triangle. The second bolt 28 is arranged approximately in the middle of the base leg of the triangle. For a simplifying assumption a crimping force biases the pivoting pliers jaw 18 in the region of the accommodation 22b and the distance of the position of introduction of the crimping force from the first bolt 27 corresponds to the distance of the first bolt 27 from the second bolt 28. Under this assumption the crimping force biasing the pivoting pliers jaw 18 causes a bolt force which biases the first bolt 27, which has an orientation in vertical direction in FIG. 1 and which doubles the crimping force. The second bolt 28 is then biased by a bolt force which approximately equals the crimping force.

(17) In FIG. 2 it can be seen that the accommodations 22 for a die insert are formed by an accommodating space 31a, 31b. The accommodating space 31a is formed in the space intermediate the pliers jaw plates 25a, 25b. The accommodating space 31b is formed in the intermediate space between the two pliers part plates 32a, 32b of the fixed pliers part 2. It is possible to introduce a flange of a die insert into the accommodating spaces 31 and to guide the same therein and/or to support the same therein, cp. DE 19 802 287 C1. Furthermore, the pliers jaw plates 25a, 25b comprise (as well as the pliers jaw plates 32a, 32b) convex accommodations 33, 34 for a supporting element (in particular a transverse bolt) of a die insert as well as a mounting bore 35 by which it is possible to screw a die insert to the pliers jaw plates 25 respectively the pliers part plates 32a, 32b. Also in this respect for further details reference is made to the publication DE 19 802 287 C1.

(18) The accommodation 22 for the die insert formed by the accommodations 33, 34 for the supporting elements defines a supporting plane 36. The supporting plane 36 has an orientation transverse to the crimping force biasing the pivoting pliers jaw 18 or the orientation differs from this transverse orientation by a maximum of 30°, a maximum of 20°, a maximum of 10° or a maximum of 5°. Preferably, the longitudinal axis of the accommodations 33, 34 respectively of the supporting elements of a die insert arranged therein define the supporting plane 36 or these are arranged therein. It is also possible that the front sides of the pliers jaw plates 25a, 25b facing towards the bit of tongues 21 define the supporting plane 36.

(19) For the shown embodiment the pliers jaw plates 25a, 25b (in a simplified consideration) form a straight lever. The crimping force biases an end region of the lever. Approximately in the middle support is provided by the bolt 27. In the other end region the support is provided by the second bolt 28. The pliers jaw plates 25 have an orientation approximately parallel to the supporting plane 36. Furthermore, in the closed position of the hand levers 5, 6 the pliers jaw plates 25 have a longitudinal extension having an orientation approximately parallel to the hand lever 5.

(20) For an embodiment (which with respect to other aspects generally corresponds to the embodiment of FIGS. 1 and 2) the crimping pliers 1 of FIGS. 3 to 6 comprise a pivoting pliers jaw 18 having a different design: in this case the pliers jaw plates 25a, 25b are L-shaped. The L-shape of the pliers jaw plates 25a, 25b comprise a mounting leg 37 and a pliers jaw leg 38. The second bolt 28 is here arranged in the free end region of the mounting leg 37. The first bolt 27 is arranged in the connecting region between the mounting leg 37 and the pliers jaw leg 38 (so in the region of the corner of the L). A connecting axis 61 of the longitudinal axes of the bolts 27, 28 in this case has an orientation approximately perpendicular to the supporting plane 36. The corresponding applies to the main extensional direction of the overlaps 24a, 24b. For this embodiment the supporting plate 23 generally has a design corresponding to the embodiment of FIGS. 1 and 2. So, in a rough approximation the supporting plate 23 has a triangular shape.

(21) Without this necessarily being the case, for the embodiment of FIGS. 3 and 4 the second bolt 28 is not only used for mounting the pliers jaw plates 25a, 25b to the supporting plate 23. Instead, the second bolt 28 at the same time serves as pivot bolt 19 of the pivot joint 20. Accordingly, by means of the second bolt 28 also the pivoting degree of freedom of the pivoting pliers jaw 18 relative to the fixed pliers jaw 7 is provided. So, for the embodiment of FIGS. 3 to 6 it is possible to save one pivot bolt. In some cases it is also possible that the pivoting pliers jaw 18 has a shortened design which is due to the fact that a horizontal distance of the bolts 27, 28 as being provided in FIGS. 1 and 2 is not required.

(22) For a simplified consideration the assumption is made that in FIG. 3 the horizontal distance of the point of introduction of the crimping force into the pivoting pliers jaw 18 from the first bolt 27 equals the distance of the bolts 27, 28 in vertical direction in FIG. 3. Under this assumption the bolts 27, 28 are each biased only by a bolt force that corresponds to the crimping force. Accordingly, by the inventive measures a mechanical bias of the bolts might result which is reduced when compared to the mechanical bias of the embodiments of FIGS. 1 and 2.

(23) In particular in FIG. 6 it can be seen that the two pliers jaw plates 25a, 25b are arranged in outer parallel planes whereas hand lever plates 39a, 39b of the movable hand lever 5 and the pliers part plates 32a, 32b of the fixed pliers part 2 are arranged between the parallel plates in adjacent parallel planes. The supporting plate 23 and the pressure lever 9 (which is here a part of a generally known forced locking unit) are again arranged in an intermediate space between the last mentioned planes.

(24) FIGS. 7 to 9 show another embodiment of inventive crimping pliers 1. Also here a pivoting pliers jaw 18 is supported by a pivot joint 20 for being pivoted by a fixed pliers part 2. However, here the pivot joint 20 is not arranged in the region of a pliers head of the crimping pliers 1, but in the region of the fixed hand lever 6 of the fixed pliers part 2. This embodiment leads to the consequence that in this case the supporting plate 23 comprises a larger extension in longitudinal direction of the crimping pliers 1. For this embodiment the supporting plate 23 comprises two plate-like supporting plate parts 40a, 40b. A spring element 41 is arranged between the supporting plate parts 40a, 40b. By the spring element 41 it is possible to influence the opening characteristic and closing characteristic of the crimping pliers and the force conditions during the opening movement and the closing movement.

(25) For the shown embodiment the supporting plate 23 and the supporting plate parts 40a, 40b are L-shaped in a rough approximation. Here, the supporting plate parts 40a, 40b each comprise a mounting leg 42a, 42b and a pivoting arm leg 43a, 43b. The pivoting arm legs 43a, 43b in this case serve for bridging the distance of the pivot joint 20 from the pliers head. Instead, the mounting leg 42 serves for mounting the pliers jaw plates 25a, 25b. For this purpose in the region of the mounting leg 42a, 42b the overlaps 24a, 24b between the supporting plate parts 40a, 40b and the pliers jaw plates 25a, 25b are formed.

(26) For the crimping pliers 1 of FIGS. 7 to 9 the toggle lever drive 4 has a design differing from the design of the embodiments toggle lever drive 4 of FIGS. 1 to 6: here the movable hand lever 5 is linked by a pivot joint 44 comprising a pivot bolt 45 at a fixed position, but for being pivoted to the fixed pliers part 2. One toggle lever 46 is formed by the movable hand lever 5 in the portion between the pivot joint 44 and a toggle joint 47. The toggle joint 47 comprises a pivot bolt 48. In the toggle joint 47 a toggle lever 49 which is a pressure lever 50 is linked to the movable hand lever 5. In the end region facing away from the toggle joint 47 the toggle lever 49 is linked by a pivot joint 51 comprising a pivot bolt 52 to the supporting plate 23. This linkage is provided (e.g. approximately in the middle) in the region of the pivoting arm leg 43a, 43b of the supporting plate parts 40a, 40b. Here, two pressure levers 50a, 50b are arranged outside from the pliers part plates 32a, 32b. The pivot bolts 52 are passed through elonged holes 53a, 53b of the pliers part plates 32a, 32b. The elonged holes 53a, 53b have a shape such that the elonged holes 53a, 53b do not interfere with the movement of the pivot bolt 52 over the crimping stroke. Furthermore, it can be seen that the crimping pliers 1 of FIGS. 7 to 9 comprise a forced locking unit 54.

(27) For the shown embodiment in a plan view onto the pliers head plane the pivoting pliers jaw 18 comprises an approximately Z-shaped geometry. Between the two horizontal legs of the Z the connecting leg has a vertical orientation. Accordingly, the two horizontal legs of the Z have an offset in the longitudinal direction of the crimping pliers 1 without an overlap of the same in longitudinal direction. Here, the lower horizontal leg of the Z is formed by the pliers jaw legs 38 of the pliers jaw plates 25. The connecting leg of the Z is formed both by the mounting leg 37 of the pliers jaw plates 25 as well as by the mounting legs 42 of the supporting plate parts 40. The upper horizontal leg of the Z is formed by the pivoting arm leg 43 of the supporting plate parts 40.

(28) In FIG. 8 die inserts 55, 56 are inserted into the accommodations 22a, 22b of the fixed pliers jaw 7 and the pivoting pliers jaw 18. The die inserts 55, 56 comprise supporting elements 58, 59. The supporting elements 58, 59 are embodied as transverse bolts. The supporting elements 58, 59 protrude on both sides from a die plate 57. The die inserts 55, 56 are arranged and supported with or by the supporting element 58, 59 in the concave accommodations 33, 34. Furthermore, the die inserts 55, 56 are additionally screwed by a mounting screw 60 in the region of the mounting bore 35.

(29) For the two embodiments in FIGS. 1 and 9 a connecting axis of the longitudinal axes of the bolts 27, 28 is denoted with the reference numeral 61. For the inventive embodiment the angle between this connecting axis 61 and the supporting plane 36 is preferably 90°±30° e.g. 90°±20° or 90°±10° or 90°±5°.

(30) In the Figures a pliers head plane denotes a plane wherein the pivoting pliers jaw 18 is pivoted. Here, the pliers head plane 62 corresponds to the drawing planes of FIG. 1, FIG. 3, FIG. 4, FIG. 5 and FIG. 9 or the pliers head plane 62 has an orientation parallel to these drawing planes.

(31) With respect to further details of the embodiment of the crimping pliers 1 of FIGS. 7 to 9 (in particular with respect to the design and the interaction of the spring element 41 for influencing the force conditions and the opening characteristic and the closing characteristic of the crimping pliers 1) reference is made to the European patent application with the application number EP 18 166 729.6 which is filed by the applicant of the present European patent application on the same date as the present European patent application. The disclosure of this simultaneously filed to European patent application is introduced by reference into the present application.

(32) Within the present specification constructional elements corresponding or being similar with respect to the function and/or the design are partly denoted with the same reference numerals but denoted with an additional distinguishing letter a, b, . . . . Reference is also made to these constructional elements partly without use of the additional letter.

(33) Many variations and modifications may be made to the preferred embodiments of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of the present invention, as defined by the following claims.