DE202010008746U1 - Device for releasably securing a conductor to a current transformer housing - Google Patents

Abstract

Device for the detachable fastening of a current conductor (1) to a current transformer housing (2), with the current transformer housing (2), a holding element (3) passed through the current transformer housing (2) and a fastening element (4) passed through the holding element (3), wherein the fastening element (4) and / or the holding element (3) in a fastened state of the conductor (1) on the device at least partially bear against the surface of the conductor (1), the fastening element (4) for fastening or detaching from the conductor (1) is rotatable about its longitudinal axis, and the holding element (3) is rotatable about its longitudinal axis in such a way that the holding element (3) is translationally displaceable in a first rotational position along its longitudinal axis for fastening or loosening the conductor (1) and the holding element (3) is translationally non-displaceable in a second rotational position along its longitudinal axis.

Description

The invention relates to a device for releasably securing a current conductor to a current transformer housing, with the current transformer housing, a guided through the current transformer housing holding element and a guided through the holding element fastener.

From the prior art it is known to drive a conductor through an opening provided on a current transformer housing opening, wherein the attachment of the conductor to the Stromwandlergehause usually via two screws or setscrews, which are guided in two arranged on the Stromwandlergehause holding elements. For attachment, the screws or the threaded pins are rotated within the holding elements by a purely rotational movement in the direction of the conductor until they rest with their cross-sectional area on the surface of the conductor. By further turning the screws or the threaded pins fixation of the conductor takes place in the Stromwandlergehause.

The disadvantage here is that the screws or the screws have a relatively long path for attachment to the conductor must lay back, which is done exclusively by a purely rotational movement, which is very power consuming and time-consuming, especially with a larger number to be fixed current transformer housing on a conductor.

The invention is therefore based on the object to provide a device for fastening a conductor to a current transformer housing, which is characterized by a simpler and faster installation.

The solution of the problem is inventively by the features of the independent claim. Advantageous embodiments of the invention are specified in the subclaims.

A solution of the above object is therefore in a device for releasably securing a conductor to a Stromwandlergehause, with the current transformer housing, a guided through the current transformer housing holding element and a guided through the holding element fastening element, wherein the fastening element and / or the holding element in a fixed state of the conductor to the device at least partially abut the surface of the conductor, the fastening element for fixing or loose of the conductor rotatable about its longitudinal axis, and the holding member is rotatable about its longitudinal axis such that the holding member in a first rotational position along its longitudinal axis is translationally displaceable for fastening or releasing of the current conductor and the holding element in a second rotational position along its longitudinal axis is translationally immovable.

According to the invention, it is thus provided that the current conductor can be fastened to the current transformer housing by a rotational movement of the fastening element and / or by a translational movement of the retaining element, ie by two basically independent movements of the fastening element or of the retaining element. Since the fastening element is passed through the retaining element, a translational displacement of the retaining element also translates the fastening element. It is provided that, on the one hand, the current conductor can be fixed by a rotational movement of the fastening element, that is, for example, the fastening element is designed as a screw which is rotationally rotatable about its longitudinal axis in a nut associated with the retaining element. On the other hand, it is provided that the holding element is designed as a "quick-shift" means for securing the current conductor such that the holding element in a first rotational position toward the conductor or away from the conductor is freely displaceable and in a second rotational position, for example, 90 ° twisted the first rotational position, is translationally immovable, that is fixed in the second rotational position on the current transformer housing with respect to a translational movement along its longitudinal axis. Thus, it is thus possible, according to the device according to the invention, to first move the holding element in the first rotational position along its longitudinal axis towards the current conductor, then rotationally rotate the holding element into its rotational position so that the current conductor can then be fixed by a rotational movement of the fastening element. Such an approach and the device according to the invention has the enormous advantage that by such a "quick fixation" of the translational movement in conjunction with a "fine adjustment" of the rotational movement of the current conductor is particularly precise and secure attachable to the current transformer housing.

The fastening element and / or the retaining element are preferably each in the form of an elongated pin-like element, which is movable for attachment of the current conductor in the direction along its longitudinal axis. In this case, the fastening element and / or the retaining element can be moved in the direction of the current conductor for fastening the current conductor and for releasing the current conductor, the fastening element or the retaining element are moved away from the current conductor, wherein the fastening element and the retaining element are preferably arranged in such a way to the conductor or are guided to the conductor, that the longitudinal axis of the fastening element or the holding element is arranged substantially transversely to the longitudinal axis of the conductor. In the attached state, in which the current conductor is fixed to the current transformer housing, the fastening element and / or the retaining element preferably lie with its respective cross-sectional area on the surface of the current conductor. For fixing the current conductor to the Stromwandlergehause are, as stated above, on the one hand the fastener rotatable about its longitudinal axis and on the other hand, the holding element translationally displaceable along its longitudinal axis, preferably a larger displacement takes place towards the conductor by the translational movement of the holding element. Further, the current transformer housing may comprise a plastic bar or a flange, which is arranged for example on a side surface of the Stromwandlergehauses, wherein in the flange, the holding element is guided.

By means of the device according to the invention, it is thus possible to substantially reduce both the expense of mounting the current transformer housing to the current conductor and the time required thereby, so that the device according to the invention makes rapid attachment of a current conductor to a current transformer housing possible. This quick attachment can preferably be done without an additional tool for attachment is necessary. In order to achieve a uniform attachment of the current conductor to the current transformer housing, a holding element with a respectively arranged therein fastener are preferably provided on two opposite side surfaces of the current transformer housing.

In principle, the holding element can be configured as desired in order to allow in its first rotational position a purely translational movement along its longitudinal axis and to prevent a translational movement along its longitudinal axis in its second rotational position. According to an advantageous embodiment of the invention, however, it is provided that the current transformer housing and the holding element in a second extending in the longitudinal axis of the holding member each having a mutually engaging groove spring-like surface and the second region corresponds to the second rotational position. According to this embodiment, it is thus provided that the current transformer housing and the retaining element preferably each have a groove-spring-like surface such that the groove-spring-like surface is formed only along the second region extending in the longitudinal axis of the retaining element. In other words, according to this embodiment, it is thus provided that the nutfederartige surface is formed only partially on the holding element and the current transformer housing, for example, comparable to a partially arranged "external thread" on the holding element and a portion of the current transformer housing arranged "internal thread" for receiving of the "external thread". Characterized in that the respective nutfederartige surface in the second region in each case engages each other, the holding element in this second rotational position is translationally immovable.

In order to enable the translatory movement in the first rotational position, there are many possibilities. According to a particularly preferred embodiment of the invention, however, it is provided that the current transformer housing and / or the holding element in a first extending in the longitudinal axis of the holding element region each having a substantially planar surface and the first region corresponds to the first rotational position. Characterized in that therefore at least the current transformer housing or the holding element in the first region having a substantially planar surface, so for example have a smooth surface, the holding element can perform a translational movement relative to the current transformer housing, so not according to the embodiment shown in its translational Movement inhibited by a nutfederartige surface, for example, in engagement with each other or the resulting friction. Such embodiments thus allow particularly simple embodiments in order to allow the translational movement of the holding element in its first rotational position or to prevent it in its second rotational position.

According to an alternative preferred embodiment, it is provided that in a first region extending in the longitudinal axis of the retaining element the retaining element has a groove-spring-like surface, the outer diameter of the retaining element is smaller along its longitudinal axis in the first region than in the second region and the first region relative to the first region first rotational position corresponds. In this embodiment, it is thus provided that the retaining element has a groove-spring-like surface both in the first region and in the second region, but the springs in the second region have a larger diameter than in the first region, so that thereby the retaining element in the first rotational position is translationally displaceable and in the second rotational position is translationally immovable. Preferably, in a region corresponding to the first region in the first rotational position, the current transformer housing has an im Substantially flat surface, so that the nutfederartige surface of the first region in the corresponding in the first rotational position portion of the current transformer housing can not engage. In this context, it is further preferred that the groove-like surface of the holding element is designed as an opening. This has the advantage that the holding element can be manufactured with a lower weight.

In principle, the fastening element and / or the retaining element can be designed as any known to those skilled in the art from the prior art means for securing the current conductor. According to a particularly preferred embodiment of the invention, however, it is provided that the fastening element is designed as a screw, the holding element has a thread and the screw for fixing or loosening of the conductor is rotationally rotatable in the thread. Thus, let the fastener particularly easy to perform and fix rotatably rotatable in a simple manner to the support member. The thread is preferably designed as a nut, as a square nut, as a hexagon nut and / or as a press-fit nut.

According to a further preferred embodiment of the invention, the device has a receiving element arranged on the current transformer housing, wherein the holding element is guided through the receiving element and the receiving element is releasably secured to the current transformer housing. This means that the receiving element with the guided through the receiving element holding element and the fastener disposed therein on the current transformer housing, for example, also subsequently, so in terms of retrofitting for an existing current transformer housing, can be fastened, so that there is a particularly universal use with vielfaltigen applications , In this case, preferably, the receiving element and / or the current transformer housing means for releasably attaching the receiving element to the Stromwandlergehause, such as locking means, which allow a particularly simple attachment or removal.

Also as far as the design of the retaining element, diverse possibilities are conceivable. According to a preferred embodiment of the invention, however, it is provided that the holding element has a substantially circular cross-section and the first region and the second region each extend over a circumferential arc of 90 ° or 180 °. Accordingly, it is therefore also preferred that the first rotational position is arranged at 90 ° or 180 ° apart from the second rotational position. Likewise, further extensions of the first or second region are possible, such as, for example, 45 ° or 22.5 °, ie preferably subdivisions which can be combined with one another. This means that according to this preferred exemplary embodiment of the invention, the holding element along its longitudinally extending surface, for example, each two oppositely disposed regions having a circumferential arc of 90 ° each having the nutfederartige surface and between the nutfederartigen surfaces each having two areas have flat surface. Accordingly, according to this example, the surface of the Stromwandlergehauses corresponding to the surface of the support member would be executed, so each two areas with a circumferential arc of 90 ° with a groove-like surface to design, each of two flat areas, also with a circumferential arc of 90 °, interrupted are.

According to a further preferred embodiment of the invention, the holding element and / or the fastening element each have a head with a knurled grip surface. Preferably, the gripping surface is designed as nutfederartige outer peripheral surface. Preferably, the grooves or springs are aligned parallel to the longitudinal axis of the holding element or of the fastening element. By such a head, the holding element or the fastener can be very easily translational or rotational move.

A current conductor can be fixed, for example, by a subsequent method to a current transformer housing having a holding element and / or with a fastening element, the method comprising the current transformer housing, the holding element guided through the current transformer housing and the fastening element guided through the holding element, the fastening element and / or the holding element in a fixed state of the current conductor at least partially abut the surface of the conductor and the holding member is rotationally rotatable about its longitudinal axis from a first rotational position to a second rotational position. For this, the method preferably has the following steps: displacement of the retaining element in the first rotational position translationally along its longitudinal axis towards the conductor, twisting of the retaining element in the second rotational position, wherein the retaining element in the second rotational position along its longitudinal axis is translationally immovable, and turning the fastener Rotational about its longitudinal axis towards the conductor.

By such a method, a current conductor can be particularly easily and quickly fixed to the current transformer housing, wherein in the sense of a "quick attachment" first the Holding element is preferably guided purely translationally until impact on the conductor and only for final fixation on the surface of the conductor performs a rotational movement for "fine adjustment". As a result, the assembly time and assembly costs can be significantly reduced.

Further advantages and embodiments of the method will become apparent to the person skilled in the art in analogy to what has been said about the device according to the invention.

The invention will be explained in more detail below with reference to the drawings based on preferred exemplary embodiments.

In the drawing show:

1 a device for releasably securing a current conductor to a current transformer housing according to a preferred exemplary embodiment of the invention in a perspective view,

2 a receiving element with a holding element and a fastening element according to the preferred exemplary embodiment of the invention in an exploded perspective view,

3 the receiving element according to the previous figure in a perspective partial sectional view, and

4 the receiving element according to the preferred embodiment of the invention in a plan view.

Out 1 is a device for releasably securing a conductor 1 on a current transformer housing 2 with a holding element 3 and / or with a fastener 4 seen. The holding element 3 is thereby by a at the current transformer housing 2 releasably attachable receiving element 5 passed. The receiving element 5 is by means of a latching means, not shown, with the current transformer housing 2 latched. Alternatively, the receiving element 5 also in the attached state of the conductor 1 on the current transformer housing 2 from the holding element 3 or the fastener 4 so against the current transformer housing 2 are pressed, that no further fastening means for securing the receiving element 5 on the current transformer housing 2 necessary is.

Like, for example 2 can be seen, which is designed as a screw fastener 4 through the retaining element 3 passed so that the screw 4 in a thread designed as a nut 6 Rotational about its longitudinal axis for attaching the conductor 1 on the current transformer housing 2 is rotatable.

The holding element 3 is in the receiving element 5 so rotatable about its longitudinal axis that the holding element 3 in a first rotational position along its longitudinal axis translationally for fixing or loose of the current conductor 1 is displaceable and the retaining element 3 in a second rotational position along its longitudinal axis is translationally immovable. For this purpose, the receiving element 5 and the holding element 3 each a nutfederartige surface 7 on, which engage in such a manner in the second rotational position that the holding element 3 opposite the receiving element 5 translationally immovable.

How out 2 to 4 can be seen, points to the holding element 3 a second region along its outer surface extending in the longitudinal axis 8th on, which respectively, how out 2 can be seen, a quarter of the outer periphery of the surface on the "front" and "back" of the support member 3 covered. Between the nutfederartig configured surfaces 7 of the second area 8th there is a first area 9 , which also has a groove-like surface 7 having, in this first area 9 the grooves as openings 10 are executed.

If now this first area 9 of the holding element 3 in the receiving element 5 in the first rotational position corresponding to a flat surface 11 of the receiving element 5 is aligned, the retaining element 3 in this first rotational position along its longitudinal axis translationally in the receiving element 5 for attaching or detaching from the conductor 1 be moved. For easy operation have the holding element 3 as well as the fastener 4 one head each 12 Thus, for example, the screw an overmolded head 12 , on.

To attach the conductor 1 at the Stromwandlergehause 2 Preferably, the following sequence takes place: The holding element 3 is in the receiving element 5 in the first rotational position, adding the flat surfaces 11 of the holding element 3 or the receiving element 5 correspond to each other, in the direction of the conductor 1 moved translationally. Once the retaining element 3 the conductor 1 touched or as close as possible to the surface of the conductor 1 is aligned, the retaining element 3 in its second rotational position rotationally relative to the receiving element 5 twisted. In this second rotational position, the region-wise arranged nutfederartigen surfaces 7 of the holding element 3 and the receiving element 5 in such a way that the holding element 3 along its longitudinal axis is translationally immovable. For final fixation now takes place a rotational movement of the fastener 4 that is, the fastener designed as a screw 4 in the thread 6 , As a result, the assembly time and assembly costs can be reduced considerably compared to devices known from the prior art.

LIST OF REFERENCE NUMBERS

1

conductor

2

Stromwandlergehause

3

retaining element

4

fastener

5

receiving element

6

thread

7

Groove-like surface

8th

Second area

9

First area

10

opening

11

Level surface

12

head

Claims (9)

Device for releasably securing a conductor ( 1 ) on a current transformer housing ( 2 ), with the current transformer housing ( 2 ), through the current transformer housing ( 2 ) guided through the retaining element ( 3 ) and a through the retaining element ( 3 ) guided fastener ( 4 ), wherein the fastener ( 4 ) and / or the retaining element ( 3 ) in a fixed state of the conductor ( 1 ) on the device at least partially on the surface of the conductor ( 1 ), the fastening element ( 4 ) for fixing or removing the conductor ( 1 ) is rotationally rotatable about its longitudinal axis, and the retaining element ( 3 ) is rotationally rotatable about its longitudinal axis, that the holding element ( 3 ) in a first rotational position along its longitudinal axis translationally for attaching or loose from the conductor ( 1 ) is displaceable and the retaining element ( 3 ) in a second rotational position along its longitudinal axis is translationally immovable. Device according to the preceding claim, wherein the current transformer housing ( 2 ) and the retaining element ( 3 ) in a second in the longitudinal axis of the holding element ( 3 ) extending area ( 8th ) an intermeshing nutfederartige surface ( 7 ) and the second area ( 8th ) corresponds to the second rotational position. Device according to one of the preceding claims, wherein the current transformer housing ( 2 ) and / or the retaining element ( 3 ) in a first in the longitudinal axis of the retaining element ( 3 ) extending area ( 9 ) each have a substantially flat surface ( 11 ) and the first area ( 9 ) corresponds to the first rotational position. Device according to one of claim 2, wherein the retaining element ( 3 ) in a first in the longitudinal axis of the retaining element ( 3 ) extending area ( 9 ) a groove-spring-like surface ( 7 ), the outer diameter of the retaining element ( 3 ) along its longitudinal axis in the first region ( 9 ) is smaller than in the second area ( 8th ) and the first area ( 9 ) corresponds to the first rotational position. Device according to the preceding claim, wherein the groove-like surface serves as an opening ( 10 ) is executed. Device according to one of the preceding claims, wherein the fastening element ( 4 ) is designed as a screw, the retaining element ( 3 ) a thread ( 6 ) and the screw for attaching or loose from the conductor ( 1 ) rotatory in the thread ( 6 ) is rotatable. Device according to one of the preceding claims, with a on the current transformer housing ( 2 ) receiving element ( 5 ), wherein the retaining element ( 3 ) by the receiving element ( 5 ) is guided and the receiving element ( 5 ) detachable at the Stromwandlergehause ( 2 ) is attached. Device according to one of the preceding claims, wherein the retaining element ( 3 ) has a substantially circular cross-section, and the first region ( 9 ) and the second area ( 8th ) each extend over a circumferential arc of 90 ° or 180 °. Device according to one of the preceding claims, wherein the retaining element ( 3 ) and / or the fastening element ( 4 ) one head each ( 12 ) with a knurled gripping surface.

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