EP3340398A1 - Tool for fastening a connecting element and a set comprising of a tool and a connection crown - Google Patents

Abstract

A tool for fastening a connection element (1), in particular a connection crown, preferably for transmitting a broadband powerline signal via a power supply network, to a connection means (7) of an electrical system (11), with a handle (12) and one with the Handle (12) connected rod-like support member (13), wherein in the region of the free end (15) of the support member (13) has an external thread (14) is formed. Furthermore, a set consisting of such a tool and a terminal crown (1) is specified.

Description

The present invention relates to a tool for fastening a connection element, in particular a connection crown, to a connection means. Furthermore, the invention relates to a set consisting of such a tool and a terminal crown.

In so-called powerline communication systems, a power supply network is used for the exchange of communication signals between the participants of the system. The data to be transmitted is modulated in the higher frequency range on one or more lines of the power supply network, for example, a phase relative to the neutral or between two phases. For example, the broadband variant of Powerline Communication - Broadband Powerline (BPL) - often uses signal components in the frequency range of 1 and 30 MHz. For coupling the communication signals to the lines of the power supply network or for decoupling transmitted via the power supply network communication signals couplers are used, which also keep the relatively high line voltage of the power supply network of the communication unit.

For the connection of such a coupler, a connection element can be used, which is realized, for example, as a connection crown for mounting on the connection means of an electrical installation, which in turn is connected to the energy supply network. The terminal crown may comprise a clamping head and a terminal pin electrically connected to the clamping head, wherein in the clamping head at least two slots may be formed which extend over at least a portion of the clamping head and divide the clamping head into at least two jaws, wherein at least one of the at least two Clamping jaws may be formed by means of resilient connection as a movable jaw, so that the at least one movable jaw between a first position and a clamping position is movable. Furthermore, a passage can be formed within the connecting pin which has an internal thread in order to realize a second connection possibility, for example for connecting a measuring device.

In such a connection element is problematic that this can be extremely difficult to apply to the connection means of the electrical system. In particular is the available space within the electrical system, such as a street distributor, very cramped, which complicates the handling of the connection element. In order to produce a particularly secure clamping connection, it is furthermore necessary to deflect the clamping jaws from their basic position so that the clamping head fits onto the connecting means. This is further complicated by the fact that the electrical system is regularly under tension when the fitter attaches the connection element to the connection means. In order to avoid injuries, the fitter wears protective gloves that make it even more difficult to handle the connection element.

The present invention is therefore based on the object of specifying a tool for fastening a connection element to a connection means, which enables a secure connection between connection element and connection means with the simplest handling. Furthermore, a set of such a tool and a connection means to be specified.

According to the invention the above object is solved by the features of claim 1. Thereafter, a tool for fastening a connection element, in particular a connection crown, preferably for transmitting a broadband powerline signal via a power supply network, to a connection means of an electrical equipment, indicated with a handle and a handle connected to the handle, bar-like support member, said Region of the free end of the support member an external thread is formed.

In accordance with the invention, it has first been recognized that the underlying object can be achieved in a surprisingly simple manner by means of a tool which has a rod-like carrying element. The rod-like support member is screwed into the connection element, whereby the connection element is held captive on the support member. The connecting element can serve, for example, for transmitting a broadband powerline signal via a power supply network and, in particular, can be designed as a terminal crown.

The installer can thus fasten the connection element initially to the support element, for example, outside the electrical system. The thus fixed connection element can then be safely in a very confined space to the connection means introduce and connect with this. The support member may have substantially the shape of the blade of a screwdriver, wherein in the region of the free end, an external thread is formed. The tool according to the invention is thus extremely easy to use even with protective gloves and in confined spaces, so that the risk of injury of the mechanic is minimized.

In a further inventive manner has been recognized that the jaws of a connection element can be spread apart by the support member, if the support member is screwed far enough into the passage of the connection element. As a result, the clamping head can be applied in a particularly simple manner to the connection means of the electrical device. After the connection element is arranged on the connection means, the support element can be removed or unscrewed from the passage, so that the clamping jaws return to their basic position and the connection element is securely clamped to the connection means.

In an advantageous manner, an actuating region without an external thread can be formed at the free end of the carrying element. The actuating region can thus be designed as a nose or punch and serves to connect with the clamping jaws of the connecting element and to press them apart. Alternatively, it is conceivable that the external thread extends directly to the free end of the support element, whereby a particularly simple embodiment of the tool is realized.

In order to allow the most flexible use of the tool, the support member may be arranged detachably on the handle. Thus, depending on the connecting element to be connected, the required support member can be connected to the handle. Consequently, connection elements of different sizes can be handled with the tool.

A particularly secure connection between connection element and connection means can be realized by forming an external thread on the connection pin of the connection element. On the external thread, a connecting element, such as a nut are applied, so that the jaws be screwed together by screwing the nut in the radial direction. Thus, a very secure attachment to the connection means is possible with a simple construction. For this purpose, it is advantageous if a screwing tool is arranged around the carrying element of the tool according to the invention. At the distal end of the screwing tool, a means of action for mounting and / or disassembling the connecting element, in particular a nut, may be formed. The support member may in particular extend coaxially within the screwing tool. Alternatively or additionally, the connecting element can serve for fastening a component, for example a cable lug. According to a particularly advantageous embodiment, the screwing tool can be detachably formed by the support element. Specifically, the screwing tool can be withdrawn for this purpose in the longitudinal direction of the support member.

To simplify the handling, the screwing tool can have a screwdriving tool handle. Furthermore, it is advantageous if the screwing tool is coupled to the carrying element via a gear, in particular a planetary gear. Specifically, within the Schraubwerkzeuggriffs a ring gear of the transmission can be arranged, wherein the Schraubwerkzeuggriff is rotatable relative to the ring gear.

The term "Schraubwerkzeuggriff" is to be understood in the broadest sense. In particular, the Schraubwerkzeuggriff can extend over the entire length of the screwing tool, up to the active agent.

Due to the arrangement of the transmission, it is conceivable that when the support element is unscrewed from the connection element, the action means of the screwing tool can be actuated by means of the transmission in such a way that the connection element is applied or screwed onto the connection pin. In a further advantageous manner, the screwing tool can alternatively or additionally be designed in the sense of a torque wrench, so that the connecting element - the nut - can be screwed onto the connecting pin with a defined torque.

In a particularly advantageous manner, the carrying element can be designed to be movable relative to the screwing tool in the axial direction, whereby the handling improved again. In particular, it is conceivable that the screwing tool can be pulled off the support element in the axial direction or longitudinal direction.

To realize the simplest possible construction, the active agent may be formed as a socket. The active agent may have a magnetic or magnetized region and / or a magnetic element in order to safely receive the connecting element in the active agent. In particular, it is conceivable that the screwing tool is designed as an extension of a socket wrench, with a socket in the required size is connectable.

Furthermore, it is conceivable that a holding tool for a component, in particular for a cable lug, is arranged around the screwing tool. The holding tool may have a holding area for holding the component and a connection area. The cable lug can be, for example, a ring cable lug and / or a fork cable lug. The holding tool is movably connected to the screwing tool, so that the holding tool and the component held therein can be brought to the connection means and held substantially stationary, while the screwing tool is used for fastening the component by means of a connecting element. Advantageously, the holding tool and the screwing tool can be moved in the longitudinal direction and in the circumferential direction against each other, in particular detach from each other, for example. In the longitudinal direction of each other. In a particularly advantageous manner, the active agent is designed to be rotatable relative to the holding region.

In order to minimize the risk of injury to the installer, the tool may have an electrical insulation, in particular the EN 60900 for insulated VDE tools correspond.

The underlying object is further solved by the features of claim 15. Thus, a set consisting of a tool according to one of claims 1 to 14 and a connection crown is specified, wherein the connection crown has a clamping head and a connection pin electrically connected to the clamping head, wherein in the connecting pin a passage is formed with an internal thread and wherein the internal thread corresponds to the external thread of the support member.

The terminal crown can be configured according to the connection element described in claims 1 to 14 and have the above features and advantages mentioned in relation to this connection element. Furthermore, the terminal crown according to claim 15 can have all the features of the connection element described in the following description of the figures.

In a particularly advantageous manner, the connecting element and thus the terminal crown according to the in the German patent application 10 2016 214 444.8 be described terminal crown and have their features and advantages. On the entire content of the German patent application 10 2016 214 444.8 is hereby incorporated by reference so that it forms part of the disclosure.

Fig. 1

in einer schematischen, geschnittenen Ansicht ein Ausführungsbeispiel eines Anschlusselements,

Fig. 2

in einer schematischen, perspektivischen Darstellung ein Ausführungsbeispiel eines erfindungsgemäßen Werkzeugs,

Fig. 3

in einer schematischen, teilweise geschnittenen Darstellung ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Werkzeugs,

Fig. 4

in einer schematischen, perspektivischen Darstellung ein Ausführungsbeispiel eines Schraubwerkzeugs sowie eines Haltewerkzeugs eines erfindungsgemäßen Werkzeugs,

Fig. 5

in einer weiteren Ansicht das Ausführungsbeispiel gemäß Fig. 5,

Fig. 6

in einer schematischen Darstellung einen Teil eines erfindungsgemäßen Werkzeugs im Gebrauch, und

Fig. 7

in einer weiteren Ansicht das Ausführungsbeispiel gemäß Fig. 5.

There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the claims subordinate to claim 1 and on the other hand to refer to the following explanation of preferred embodiments of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiments of the invention with reference to the drawings, also generally preferred embodiments and developments of the teaching are explained. In the drawing show

Fig. 1

in a schematic, sectional view of an embodiment of a connection element,

Fig. 2

1 is a schematic perspective view of an exemplary embodiment of a tool according to the invention;

Fig. 3

in a schematic, partially sectional view of another embodiment of a tool according to the invention,

Fig. 4

1 is a schematic perspective view of an exemplary embodiment of a screwing tool and a holding tool of a tool according to the invention;

Fig. 5

in a further view of the embodiment according to Fig. 5 .

Fig. 6

in a schematic representation of a part of a tool according to the invention in use, and

Fig. 7

in a further view of the embodiment according to Fig. 5 ,

Fig. 1 shows in a schematic, sectional view of an embodiment of a connection element 1. The connection element 1 is realized as a connection crown, which can be plugged onto a connection means of an electrical system, such as a screw head, a nut, a thread, a round or any other way shaped geometry, is formed. The connection element 1 is made in one piece from a steel, preferably 8.8 steel, and has a connection pin 2 and a clamping head 3, wherein the connection pin 2 directly adjoins the clamping head 3. Due to the one-piece design of the connection element 1 pin 2 and 3 clamping head are electrically connected to each other. The clamping head 3 has in this embodiment a plurality of slots 4, which divide the clamping head 3 into a plurality of clamping jaws 5. Furthermore, it can be seen that the slots 4 not only extend over part of the clamping head 3, but additionally protrude into the connecting pin 2. This creates between the upper part of the connecting pin 2 and the respective clamping head 3 is a resilient connection, which ensures good mobility of the jaws 5 at the same time good clamping effect in the assembled state. On the inner wall of the clamping jaws 5 a toothing is formed in order to prevent slippage or removal of the connecting element.

On the lateral surface of the connecting pin 2, an external thread is formed, which simplifies the illustration in Fig. 1 not shown. On the external thread can be screwed - not shown - connecting element 6, in particular a nut, whereby the jaws 5 are compressed to an even better connection between the connecting element 1 and the in Fig. 1 To reach connecting means 7, not shown.

Furthermore, an internal thread 9 is formed in the passage 8 of the connection element 1 at least in some areas. In Fig. 1 Furthermore, it can be seen that the passage 8 has a tapered transition region 10. At the transition region 10, the diameter of the passage 8 may decrease by more than 50%.

Fig. 2 shows a schematic, perspective view of an embodiment of a tool according to the invention. The tool is used for fastening a connection element 1, as for example in Fig. 1 is shown. The connection element 1 can thus be, in particular, a connection crown which is connected to a connection means 7 of a connection crown Fig. 2 not shown electrical system 11 is mounted. The tool has a handle 12. On the handle 12, a rod-like support member 13 is formed. The support member 13 is used for insertion into the passage 8 of the connection element 1 in order to easily handle the connection element 1 or to bring it to the connection means 7.

Furthermore, the support member 14 serves to spread apart the jaws 5 in the transition region 10. In the region of the free end 15 of the carrying element 13, an external thread 14 is formed for this, which corresponds to the internal thread 9 of the connecting element 2. When screwing the support member 13 in the connection element 1, the jaws 5 are spread, so that the connection element 1 is easier to attach to the connection means 7.

A significant advantage of the tool according to the invention is that the connection element 1 outside of the electrical system 11 can be screwed and held on the tool. In addition, the jaws 5 can be spread apart by the free end 15 of the support member 13. In this position, the connection element 1 can be plugged onto the connection means 7 by means of the tool according to the invention.

In Fig. 2 Furthermore, it can be seen that the external thread 14 does not extend directly to the free end 15 of the support element 13. Rather, the free end 15 of the support member 13 is realized as an actuating portion 16 without external thread 14. As a result of the realization of the actuation region 16, the support element 13 can be fastened particularly securely on the transition region 10 of the connection element 1 attack and press the jaws 5 apart. Alternatively, it is conceivable that the external thread 14 extends directly to the free end 15.

Still goes out Fig. 2 shows that the support member 13 is at least partially surrounded by an insulation 17. In a particularly advantageous manner, the entire tool according to the invention is insulated, preferably in accordance with EN 609900.

Fig. 3 shows in a schematic, partially sectional view of another embodiment of a tool according to the invention. The tool has a handle 12 and a rod-like support element 13 carried by the handle 12. In the region of the free end 15 of the carrying element 13, an external thread 14 is formed, which corresponds to the internal thread 9 of the connecting element 1. With regard to the further embodiment of the support member 13 and the handle 12 is based on the above description of Fig. 2 directed.

To the support member 13, a screwing tool 18 is arranged. The screwing tool 18 has at its distal end an active means 19 for mounting and / or disassembling a connecting element 6. In a particularly advantageous manner, the screwing tool 18 is releasably connected to the support member 13, for example, in the longitudinal direction of this deductible.

In the embodiment shown here, the active agent 19 is designed as a socket, which corresponds to the realized as a screw nut connecting element 6. The screwing tool 18 is coupled via a not-shown gear, in particular a planetary gear, with the support member 13. Specifically, a ring gear 21 of a transmission is disposed within the Schraubwerkzeuggriffs 20, wherein the Schraubwerkzeuggriff 20 is formed rotatable relative to the ring gear 21. It can be clearly seen that the Schraubwerkzeuggriff 20 extends over the entire length of the screwing tool 18 up to the active agent 19. The coupling between the support member 13 and screwing tool 18 is such that when unscrewing the support member 13 from the connection element 1, the active agent 19 is rotated, so that the Connecting element 6 is screwed onto the external thread of the pin 2.

Furthermore, a holding tool 22, which serves to hold a component 23, is arranged around the screwing tool 18. The component 23 in the exemplary embodiment shown here is a cable lug. The cable lug can be realized as a ring cable lug or fork cable lug and can be arranged on a connection cable of a coupler 29, which serves for coupling the communication signals to the lines of a power supply network or for coupling out communication signals transmitted via the energy supply network. Corresponding couplers 29 may be designed as capacitive couplers, which are dimensioned such that the low-frequency line voltage of the power supply network is significantly reduced or even completely blocked and communication signals are largely passed unchanged.

The holding tool 22 has a holding region 24 for holding the component 23 and a connection region 25. Via the connecting region 25, the holding tool 22 is rotatably and longitudinally displaceably coupled to the screwing tool 18.

In the FIGS. 4 and 5 an embodiment of a screwing tool 18 and a holding tool 22 of a tool according to the invention is shown. The holding tool 22 has a holding region 24 which serves to receive a component 23, wherein in the exemplary embodiment illustrated here, the component 23 is a ring cable lug.

Furthermore, the holding tool 22 comprises a connection region 25 via which it is movably connected to the screwing tool 18. In the embodiment shown here, the connecting portion 25 is sleeve-shaped and surrounds the coupling portion 26 of the screw 18. The holding tool 22 and the screw 18 are longitudinally against each other. Furthermore, the holding tool 22 and the screw 18 are rotated against each other.

The connecting region 25 can be gripped and, for example, held stationary by means of a tool and / or by hand. Thereby, the component 23 is held in a defined position, while the screwing tool 18 is rotatable and displaceable in the longitudinal direction, so that the component 23 via the screwing tool 18 with a connecting element 6 can be fastened. It is conceivable that the surface of the connecting region 25 is structured in order to improve the grip of the holding tool 22.

In particular from Fig. 5 clearly shows that the holding portion 24 is fork-shaped. The prongs 27 each have a recess 28, so that the component 23 is fixed to the holding region 24 at least substantially in the longitudinal direction and in the circumferential direction. Any constructions are conceivable, it is essential that the component 23 is sufficiently securely fixed to the holding portion 24 so that it at most slightly changed during assembly or disassembly its position or not twisted and / or slip.

From the Fig. 4 and 5 Furthermore, it can be seen that the holding region 24 adjoins the connection region 25 and extends partially in the radial direction outside the screwing tool 18. The component 23 is held by the holding region 24 such that it is arranged in the longitudinal direction in front of the distal end of the screwing tool 18. At the distal end of the screw 18, a means of action 19, in particular a socket is provided. In or on the active agent 19, a connecting element 6, for example a nut, detachable and rotatable can be arranged.

It is conceivable that the connecting element 6 is arranged positively and / or non-positively in the active means 19 in order to prevent falling out during assembly or disassembly. Alternatively or additionally, it is conceivable that the active agent 19 as such is at least partially magnetized or has a magnetic element, by which the connecting element 6 is held in the active agent 19.

Furthermore, a limiting element can be provided as a depth stop on or in the active means 19, so that the connecting element 6 is not too far in the active agent 19 can be inserted. The limiting element may have a passage, so that the carrying element 13 can be inserted therethrough.

In the Fig. 6 and 7 a part of a tool according to the invention is shown in use. It can be seen that the clamping jaws 5 of the terminal crown formed as a connecting element 1 are spread apart by the support member 13, not shown, from each other. Thus, the clamping head 3 with the tool according to the invention can be plugged onto the connecting means 7 of the electrical system 11 designed as a screw head. When unscrewing the support member 13 from the connection element 1, the active agent 19 of the screw 18 is rotated via a gear. As a result, the arranged in the active agent 19 connecting element 6 is turned on the external thread of the connecting pin 2. The active agent 19 is as a socket and the corresponding connecting element 6 is realized as a nut. By the connecting element 6, the jaws 5 are pressed together, so that the jaws 5 rest securely on the connecting means 7.

With regard to further advantageous embodiments of the tool according to the invention and of the set according to the invention, reference is made to avoid repetition to the general part of the description and to the appended claims.

Finally, it should be expressly pointed out that the above-described embodiments of the tool according to the invention and of the set according to the invention merely serve to discuss the claimed teaching, but do not restrict it to the exemplary embodiments.

LIST OF REFERENCE NUMBERS

1

connecting element

2

pin

3

clamping head

4

slot

5

jaw

6

connecting element

7

connection means

8th

passage

9

inner thread

10

Transition area

11

Electrical system

12

handle

13

carrying member

14

external thread

15

free end

16

operating range

17

insulation

18

Wrench

19

effective means

20

Schraubwerkzeuggriff

21

ring gear

22

holding tool

23

component

24

holding area

25

connecting area

26

coupling section

27

prong

28

recess

29

coupler

Claims (15)

Tool for fastening a connection element (1), in particular a connection crown, preferably for transmitting a broadband powerline signal via a power supply network, to a connection means (7) of an electrical system (11), with a handle (12) and one with the handle (12) connected rod-like support member (13), wherein in the region of the free end (15) of the support member (13) has an external thread (14) is formed. Tool according to claim 1, characterized in that directly at the free end (15) of the support member, an actuating portion (16) without external thread (14) is formed. Tool according to claim 1, characterized in that the external thread (14) extends directly to the free end (15) of the support element (13). Tool according to one of claims 1 to 3, characterized in that the support element (13) is detachably arranged on the handle (12). Tool according to one of claims 1 to 4, characterized in that a screwing tool (18) is arranged around the carrying element (13), the screwing tool (18) having at its distal end an active means (19) for mounting and / or dismantling a connecting element (6). Tool according to claim 5, characterized in that the screwing tool (18) has a Schraubwerkzeuggriff (20). Tool according to claim 5 or 6, characterized in that the screwing tool (18) via a transmission, in particular a planetary gear, with the support member (13) is coupled. Tool according to claim 7, characterized in that within the Schraubwerkzeuggriffs (20) a ring gear (21) of the transmission is arranged, wherein the Schraubwerkzeuggriff (20) relative to the ring gear (21) is rotatable. Tool according to one of claims 5 to 8, characterized in that the carrying element (13) relative to the screwing tool (18) is movable in the axial direction. Tool according to one of claims 5 to 9, characterized in that the active agent (19) formed as a socket. Tool according to one of claims 5 to 10, characterized in that a holding tool (22) for a component (23), in particular for a cable lug, is arranged around the screwing tool (18). Tool according to claim 11, characterized in that the holding tool (22) has a holding region (24) for holding the component (23) and a connecting region (25). Tool according to claim 12, characterized in that the active means (19) opposite to the holding portion (24) is rotatably formed. Tool according to one of claims 1 to 13, characterized in that the tool is designed to be electrically insulated, in particular according to EN 60900. Set comprising a tool according to one of claims 1 to 14 and a connection crown (1), wherein the connection crown (1) has a clamping head (3) and a connection pin (2) electrically connected to the clamping head (3), wherein in the connection pin (2) a passage (8) with an internal thread (9) is formed and wherein the internal thread (9) with the external thread (14) of the support member (13) corresponds.

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