EP2603951B1 - Connection terminal - Google Patents

Description

The invention relates to a terminal, in particular terminal, with a busbar, wherein on the busbar at least one through opening for receiving a bridging device is formed, wherein the insertion opening is in the form of a hole collar having material passage, wherein the hole collar of Materialdurchzuge circumferentially formed around the insertion opening is.

Such terminals, in particular terminal blocks, are usually snapped onto a mounting rail and provide a large number of terminal points for a space-saving distribution of potentials and currents available. By means of bridging devices adjacent or spaced by other terminals terminals or terminal blocks can be electrically contacted with each other. For this purpose, provided in the terminals or terminal blocks busbars are provided with one or more through openings in the form of Materialdurchzügen, which are preferably arranged in a plurality of material passages in a line to obtain the narrowest possible design of the busbar, as for example Through busbars closely adjacent terminal block assemblies is required. In the region of the material passages, such particularly narrow busbars have only narrow edge webs running in the busbar direction, whose current conductor cross sections are generally insufficient. This disadvantage is compensated by the hole collar of the material passages whose hole collar cross sections at the same time Power line cross sections are, so that in total the cross sections of the edge webs and the cross sections of the hole collar provide a sufficiently large power line cross section in the direction of the busbar available. The hole collar of the material passages are, as it is for example in the DE 28 25 291 A1 is shown, circumferentially around the insertion opening and in the direction of insertion of the bridging device in the insertion opening or in the material passage on the underside of the arranged in the terminal rail, ie the pointing in the direction of DIN rail side of the busbar formed.

In order to achieve the most economical possible production of such connection terminals, in particular terminal blocks, it is an objective to reduce the material costs of such a connection terminal. If this reduces the height of the hole collar of the material passage, this leads to a reduction in the power line cross-section, whereby a secure contact can no longer be guaranteed.

The invention is therefore based on the object to provide a solution by means of which at a terminal, in particular a terminal, a reduction in material costs is achieved without reducing the power line cross-section.

In a terminal, in particular terminal blocks, of the type described in more detail, the object is achieved in that the hole collar extends opposite to the direction of insertion of the bridging device from the surface of the busbar away.

Due to the fact that according to the invention the hole collar of the material passage from the surface of the busbar is pulled opposite to the direction of insertion of the bridging means or extends, it is achieved that the distance between the busbar and the mounting rail with respect to a terminal with an insertion direction on the busbar provided hole collar can be reduced without the required length of an air and creepage distance between the busbar and the mounting rail is exceeded. Thus, despite a reduction in the distance between the busbar and the mounting rail and thus a reduction in the dimensions of the housing of the terminal still a sufficiently large clearance and creepage distance between the busbar and the mounting rail are provided.

In the solution according to the invention thus the hole collar is provided on the side of the busbar, which is remote from the mounting rail on which the terminal is arranged. If, as usual, the hole collar provided on the rail side facing the busbar, the air and creepage distance between the busbar and the mounting rail shortens. In order to ensure a sufficiently large clearance and creepage distance, the height of the protective conductor element between the busbar and the mounting rail must be made larger, thereby changing the height level of the busbar and more material is required for the protective conductor element. By contrast, by means of the solution according to the invention, the cost of materials, in particular for the protective conductor element, can be reduced, which in turn leads to a reduction in the material costs. The power line cross-section of the hole collar must hereby not changed or reduced. By contrast, the power line cross-section of the hole collar can be increased, since in particular the height of the hole collar now has no influence on the creepage distance between the busbar and the mounting rail. The inventive design of the material passage on the busbar is particularly advantageous if below the busbar, in the direction of insertion of the bridging device one or more blind holes for receiving carried through the insertion opening bridging means are provided, since the blind holes regardless of the configuration of the hole collar of the material passage can be formed in the housing of the terminal. Due to the design of the hole collar of the material throughput opposite to the insertion of the bridging device on the top of the busbar applied to the mounting rail mounting of the busbar is possible even with closed blind holes without further effort. As a bridging device, the same bridging devices, as used in the known terminals, can be used, so that no adaptation of the configuration of the known bridging devices to the terminal of the invention is required. Thus, the same bridging means of existing terminals can be used without the need for additional components or the terminal must be made larger in size.

The bridging device may be a bridge or an electrical conductor with a clamping spring. If the bridging device has a clamping spring, the clamping spring can be fixed, for example, with both legs in the Material passage be added. Alternatively, it is also possible that the contact leg of the clamping spring is fixed outside of the material passage, while the clamping leg is immersed in the material passage.

Advantageous embodiments of the invention are specified in the subclaims.

According to a preferred embodiment of the invention, an introduction slope or an introductory rounding is provided on at least one inner wall surface of the hole collar at an end of the hole collar facing away from the busbar. By providing an insertion bevel or an introductory rounding at the end of the hole collar facing away from the busbar in the region of an inner wall surface of the hole collar, the leading end of the bridging device can be selectively guided, in particular slidably, into the material passage and during insertion of the bridging device into the insertion opening or into the material passage are guided by the insertion opening formed on the busbar, whereby necessary forces for the introduction of the bridging means reduced and possibly an existing surface coating on the inner wall surface of the hole collar can be protected against damage. The formation of an insertion slope or introduction rounding directly to the hole collar of the material passage formation of insertion aids in the housing of the terminal itself is no longer necessary, whereby the production of the housing can be simplified, otherwise usually formed in the housing insertion aids removal of the housing the casting tool difficult. To form an insertion bevel, the inner wall surface on the the busbar remote from the end of the hole collar to be provided with a phase. To form an introductory rounding, the inner wall surface may be provided with a radius at the end of the perforated collar facing away from the busbar.

The insertion bevel or introduction rounding is formed according to a further preferred embodiment of the invention circumferentially on the busbar remote from the end of the hole collar. In the circumferential formation of the insertion bevel or introduction rounding all inner wall surfaces of the hole collar are provided at the end remote from the busbar end of the hole collar with an insertion slope or introduction rounding. In this way, all side surfaces or inner wall surfaces of the hole collar or the material passage for contacting the bridging device can be used with the busbar, whereby the number of possible contact points can be increased or used for other components, such as test plugs, as an alternative contact point.

Furthermore, it is provided according to a preferred embodiment of the invention that the hole collar is made in a flowdrill process. In the production of the hole collar or the material passage in the flow-drilling method, a passage opening is first drilled in the busbar whose diameter is many times smaller than the diameter of the final through hole or the material passage. Subsequently, the existing through-hole is drilled out with a special flow drill in flow-flow method, also called flow-forming technology. During the drilling process, part of the hole will be out of the hole removed hot and liquid material transported by the drill up to the surface of the busbar, whereby the hole collar is formed. By means of the Flowdrillverfahrens can be introduced in a simple manner with a few steps a formed with a hole collar material passage in a busbar.

Furthermore, it is provided according to a further advantageous embodiment of the invention that extends the hole collar in addition to the extension opposite to the direction of insertion of the bridging device in the direction of insertion direction of the bridging device from the surface of the busbar away. Characterized in that extends in this embodiment, the hole collar in both directions, the hole collar and thus the material passage can be made longer, creating an improved and safer contacting can be provided. The production of a hole collar, which extends in both directions, can preferably be produced by the previously described flow-drilling method, since hot and liquid material dissolved out of the busbar during drilling not only in the bore direction but also opposite to the bore direction due to the advancement of the Bohrers and the gravitational force flows. This makes it possible to form a hole collar or a material passage in one operation or step, which extends both opposite to the direction of insertion of the lock-up device as well as in the insertion direction of the lock-up device.

The invention will be explained in more detail below with reference to the accompanying drawings with reference to a preferred embodiment.

Fig. 1

eine schematische Darstellung einer Stromschiene mit einem daran ausgebildeten einen Lochkragen aufweisenden Materialdurchzug gemäß der Erfindung mit einer darin eingeführten Überbrückungseinrichtung;

Fig. 2

eine vergrößerte schematische Darstellung des Lochkragens des Materialdurchzuges gemäß der Erfindung;

Fig. 3

eine schematische Darstellung eines Längsschnittes durch eine Anschlussklemme gemäß der Erfindung;

Fig. 4

eine weitere schematische Darstellung eines Längsschnittes durch eine Anschlussklemme gemäß der Erfindung.

Show it:

Fig. 1

a schematic representation of a busbar having formed thereon a hole collar material passage according to the invention with a bridging device inserted therein;

Fig. 2

an enlarged schematic representation of the hole collar of the material passage according to the invention;

Fig. 3

a schematic representation of a longitudinal section through a terminal according to the invention;

Fig. 4

a further schematic representation of a longitudinal section through a terminal according to the invention.

Fig. 1 shows a bus bar 10 with two through openings 12, in which a bridging means 14 and a test plug 16 are inserted. The bridging device 14 is shown in the form of a bridge in the embodiment shown here. However, it can also be in the form of a spring element which is mounted in one or more push-through openings 12 and not shown here.

The insertion opening 12 is formed in the form of a hole collar 18 having material passage. The hole collar 18 of the material passage is formed substantially square and is circumferentially around the insertion opening, arranged annularly closed. The hole collar 18 of the material passage is formed on the bus bar 10 such that the hole collar 18 extends opposite to the insertion direction 20 of the bridging device 14 from the surface 22 of the bus bar 10 away.

In addition to the through-openings 12, two further through-openings 24 are formed on the busbar 10, via which, for example, a protective conductor element 26 of a terminal can be connected to the busbar 10 via latching pins 48, as shown in FIG Fig. 4 is shown.

The through openings 12 and the through openings 24 are provided in the embodiment shown here in a line next to each other on the busbar 10.

Fig. 2 shows an enlarged view of the hole collar 18 of the material passage, in which case it is shown that on all four inner wall surfaces 28, 34 of the hole collar 18 at one of the busbar 10 facing away from the end 30 of the hole collar 18 an insertion bevel 32 is formed in the form of a phase. The introduction bevel 32 is thus formed circumferentially on the end of the hole collar 18 facing away from the busbar 10. When inserting a lock-up device 14 in the material passage or the insertion opening 12, this can thus be introduced selectively along the insertion bevels 32 in the material passage. The insertion bevel 32 thus serves as an introductory aid. In addition, the number of contact points, for example, for the inserted into the insertion opening 12 bridging means 14 and inserted into the insertion opening 12 test plug 16 is increased by the circumferentially provided insertion bevel. The contact points or contact zones of the bridging device 14 with the material passage are preferably provided on the inner wall surfaces 28 of the hole collar 18 or the insertion opening 12 running on the longitudinal side of the hole collar 18. The contact points or contact zones of a test plug 16 with the material passage are preferably provided on the inner wall surfaces 34 of the hole collar 18 or the insertion opening 12 running on the transverse side of the hole collar 18.

Fig. 3 and Fig. 4 show the in Fig. 1 and Fig. 2 shown busbar 10 disposed in a housing 36 of a terminal, in particular a terminal. The terminal is connected to its housing 36, as in Fig. 3 shown arranged on a mounting rail 40. The necessary distance of the support rail 40 to the busbar 10 of the terminal results from a required length of an air and creepage distance 42, as in Fig. 3 is shown. The hole collar 18 of the material passages of the two provided here, in the Fig. 3 and Fig. 4 not visible, through-openings 12 extend opposite to the insertion direction 20 of the bridging device 14. In the state inserted into the terminal thus the hole collar 18 extending from the support rail 40 facing away from surface 22 of the busbar 10 away. The fact that the hole collar 18 extend away from the support rail 40 facing away from the surface 22 of the busbar 10, is provided in the provision of the Hole collar 18, the distance between the busbar 10 and the support rail 40 is not smaller, so that the busbar 10 does not have to be arranged at a higher height level, as is the case when the hole collar 18 is disposed on the support rail 40 facing surface 46. As a result, it is no longer necessary to make the protective conductor element 26 larger between the support rail 40 and the busbar 10, as a result of which both the cost of materials and the material costs can be reduced.

As in Fig. 3 can be seen, below the busbar 10 indicated by a dashed line blind holes 44 are provided, in which the inserted into the insertion openings 12 bridging means 14 and, for example, a in Fig. 3 Not shown test plug 16 can protrude. The hole collar 18 of the material passages are arranged on the side facing away from the blind holes 44 side of the bus bar 10, so that the height and shape of the hole collar 18 may be formed independently of the configuration of the blind holes 44.

LIST OF REFERENCE NUMBERS

conductor rail

10

Through opening

12

bridging device

14

Test Plugs

16

hole collar

18

insertion direction

20

surface

22

Through opening

24

Protective earth element

26

Inner wall surface

28

The End

30

insertion bevel

32

Inner wall surface

34

casing

36

rail

40

Air and creepage distance

42

blind

44

surface

46

latching pin

48

Claims (5)

1. Connection terminal, in particular a terminal block, having a busbar (10), wherein at least one through-opening (12) for receiving a bridging device (14) is formed on the busbar (10), wherein the through-opening (12) is in the form of a material passage which has a hole collar (18), wherein the hole collar (18) of the material passage is formed circumferentially around the through-opening (12), characterized in that the hole collar (18) extends away from the surface (22) of the busbar (10) in the opposite direction to the insertion direction (20) of the bridging device (14).
2. Connection terminal according to Claim 1, characterized in that an insertion slope (32) or a rounded insertion portion is provided on at least one inner wall face (28, 34) of the hole collar (18) at an end (30) of the hole collar (18) which is averted from the busbar (10).
3. Connection terminal according to Claim 2, characterized in that the insertion slope (32) or rounded insertion portion is formed circumferentially around that end (30) of the hole collar (18) which is averted from the busbar (10).
4. Connection terminal according to one of Claims 1 to 3, characterized in that the hole collar (18) is produced using a Flowdrill method.
5. Connection terminal according to one of Claims 1 to 4, characterized in that the hole collar (18), in addition to extending in the opposite direction to the insertion direction (20) of the bridging device (14), extends away from the surface (46) of the busbar (10) in the direction of the insertion direction (20) of the bridging device.

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