WO2017016751A1

WO2017016751A1 - Conductor connection terminal

Info

Publication number: WO2017016751A1
Application number: PCT/EP2016/064037
Authority: WO
Inventors: Hans-Josef Köllmann
Original assignee: Wago Verwaltungsgesellschaft Mbh
Priority date: 2015-07-29
Filing date: 2016-06-17
Publication date: 2017-02-02
Also published as: DE102015112433B4; DE102015112433A1

Abstract

The invention relates to a conductor connection terminal (1) for clamping an electric conductor (2, 2a), comprising an insulating material housing (11), a force element (5), and a busbar assembly (3). The force element (5) is designed to interact with the busbar assembly (3) in order to exert a clamping force onto the electric conductor (2, 2a) clamped to the busbar assembly (3). The busbar assembly (3) has two opposite busbar parts (4a, 4b) which are mounted so as to be movable relative to each other, for clamping the electric conductor (2, 2a) between the two busbar parts (4a, 4b). The two busbar parts (4a, 4b) are designed such that, in the clamped state, they both directly contact an arrester (2b, 16) in an electrically conductive manner and provide a direct electrically parallel connection between the clamped electric conductor (2, 2a) and the arrester (2b, 16).

Description

Conductor terminal

The invention relates to a conductor terminal for clamping an electrical conductor with an insulating material, a power element and a busbar assembly. The force element is designed to cooperate with the busbar arrangement for exerting a clamping force on the electrical conductor clamped to the busbar arrangement. The busbar arrangement has two mutually opposite and relatively movable busbar parts for clamping the electrical conductor between the two busbar parts.

Such conductor terminals are used in a variety of forms, for example in terminal blocks, terminal blocks, PCB terminals or connectors. They can be designed for clamping a single electrical conductor with a force element, wherein the electrical conductor is connected via the busbar parts with a further conductor terminal, a printed circuit board connection or other connection contact. In a terminal box, for example, a plurality of conductor terminals are coupled together side by side via a common busbar part. Other types of conductor terminals are provided for clamping at least two electrical conductors to a common busbar assembly. In this respect, in the sense of the present invention and the description of the indefinite term "a" not as a number word, but in the sense of "at least a "to understand.

EP 2 395 605 B1 shows such a conductor connection terminal for clamping two electrical conductors to a common busbar piece with the aid of a spring clamping element. This has a movable relative to the busbar piece clamping yoke. A coil spring is in operative connection with the busbar piece and the clamping yoke and exerts a spring force between the clamping yoke and conductor rail piece. It is a rotatably mounted with a screw actuator cylinder mounted on the drawbar or the busbar piece. The electrical conductors are clamped to the common conductor rail piece by means of a respective draw frame per electrical conductor, the clamping edges of which are pressed against the electrical conductor located between the clamping edges and the conductor rail piece by the helical spring.

DE 1 0 2010 032 91 1 B4 discloses a conductor connection element with a compression sleeve and a conductor contact section surrounded by the compression sleeve. The conductor contact portion has a plurality of stacked ones

Sheet metal elements with each opposing and spaced apart conductor connection fork tongues. By the lamellar, stacked sheet metal elements a pressing contact with forks is provided, in which the inner edges of the conductor connection fork tongues are pressed at a plurality of contact points largely independently of each other to the electrical conductor to be connected. This enables the transmission of high currents.

DE 10 2010 035 704 B4 discloses an electrical plug connector with a plug contact connection for the electrically conductive connection to a corresponding mating plug contact connection of a mating plug connector. The plug-in contact connection is designed as a comb connector with a plurality of contact prongs, which are arranged on a common plug-in plane in a plug-in connection. nem distance while leaving contact grooves are arranged from each other. The contact prongs each have a free end and are connected to each other at the free end with a crosspiece. The contact prongs are integrally molded with the transverse web of an electrically conductive material. A spring force element is applied to the two outer contact prongs and exerts on the two outer contact prongs of a composite of connector and mating connector a mutually directed clamping force. EP 2 562 878 A2 discloses a connection terminal for electrically connecting conductors to an insulating material housing and having at least one clamping device arranged in the housing for clamping a conductor. The clamping device has a contact rail, which is placed between a clamping spring and the electrical conductor to be clamped. On the clamping spring, a contact element is mounted opposite the busbar, that is acted upon by the clamping spring in order to transmit the spring force via a force application surface of the contact element to the electrical conductor and to clamp this electrically conductive on the busbar. The busbar is connected to an adjacent terminal connection, so that an electrical current from the clamped electrical conductor takes place exclusively via the electrically conductive connection to the busbar.

Based on this, it is an object of the present invention to provide an improved conductor terminal, which allows the clamping larger conductor cross-sections with reduced clamping force or improves the contact resistance between a clamped electrical conductor and a Abieiter without the contact force is substantially increased. The object is achieved with the conductor terminal with the features of claim 1. Advantageous embodiments are in the subclaims described.

In a generic conductor connection terminal is proposed that the two busbar parts are formed to stand in the clamped state in each case in a directly electrically conductive contact with the Abieiter and to provide a direct, electrically parallel connection between the clamped electrical conductor and the Abieiter. According to the invention, two busbar parts are thus electrically connected in parallel in order to improve the contact resistance between an electrical conductor and a conductor via these two parallel current connections. The

The direction of the current is insignificant, so that a conductor is also understood as meaning a conductor or a second electrical conductor clamped to the conductor terminal. The electrical conductor and possibly a second electrical conductor are contacted directly with the two opposing busbar parts, wherein a clamping force is exerted on the busbar parts. Thus, the at least one electrical conductor is clamped to the two busbar parts. There are thus two opposite, direct electrical contacts between the electrical conductor and the busbar parts available. About this parallel connection of the busbar parts, the current is then passed to the common Abieiter or vice versa.

This makes it possible to clamp larger conductor cross sections with a consistent or even reduced clamping force compared to the conventional use of a single busbar.

In one embodiment of the conductor connection terminal is provided that the two busbar parts are directly connected to each other positively or cohesively and are in direct electrical contact with each other. This embodiment sees the clamping of a single electrical see conductor between the two busbar parts. On the side facing away from the terminal point for the electrical conductor to be clamped, the two busbar parts are then connected directly to each other positively or cohesively, to then pass from there into a common Abieiter. This embodiment is particularly useful for can terminals, but also for PCB terminals, terminal blocks or connectors. The non-positive connection can be achieved, for example, in that one of the busbar parts has a fork that dips into an opening in the other busbar part and there causes an electrically conductive spring-clamped connection. The two busbar parts are movable relative to each other.

In another embodiment, it is provided that the insulating housing has two conductor insertion openings, which are designed to insert in each case an electrical conductor to a respective terminal point on the opposing busbar parts. The bus bar parts are then formed to provide a direct electrical parallel connection between the electrical conductors inserted into the conductor entry openings and clamped to the bus bar parts. In this embodiment, therefore, a second electrical conductor to be connected to the two opposing busbar parts forms the absorber. The electrically conductive connection between the two electrical conductors to be clamped via the two busbar parts connected electrically in parallel causes the two busbars to come into direct electrical contact with the electrical conductors to be clamped.

It is advantageous if the first busbar part is arranged fixed relative to the insulating material housing and the second busbar part is movably arranged with respect to the first busbar part. The fixed first current rail part then provides a constant spatial orientation for the

Inserting an electrical conductor and a fixed contact point for the force element ready.

For applying force to the busbar parts, a bracket element arranged on the second busbar part can be provided. The clamping element is then arranged between the yoke element and the first busbar part in order to exert a clamping force between the first busbar part and the yoke element and a clamping force acting between the first and second busbar part for clamping an electrical conductor to the first and second busbar part or for clamping the first busbar part and second busbar part to effect each other. With the help of such a the movable second busbar part under cross bracket element, it is possible to arrange the force element on the side facing away from the second busbar part of the first busbar part. The clamping force exerted by the force element on this side is then transmitted via the belt element to the second busbar part. This allows a compact and simple construction of the conductor terminal. In addition, such a conductor terminal can then be constructed self-supporting, without significant forces acting on the insulating material. The force element may be a clamping spring which exerts a spring clamping force with which an electrical conductor is clamped to the two busbar parts.

Such a clamping spring may have a plant leg, a spring bow and a clamping leg, wherein the clamping spring is supported with its plant leg directly or indirectly to the first busbar part and exerts a spring clamping force on the first busbar part opposite the second busbar part with its clamping leg. It is also conceivable that the force element is designed as a loop spring, cage tension spring, coil spring or as a clamping screw. The force element may, for example, be a loop spring with at least two spring arcs. Such a loop spring has a contact leg on its first free end section and a clamping leg on its opposite, second free end section. At the plant leg then joins a spring bow. Another spring bow joins the

Clamping leg, so that at least two separate spring arches are present. The pairwise opposing spring arches are then connected to each other via a spring section. This spring portion then extends in the space between the plant leg and the clamping leg.

If the loop spring has two spring arcs, a stacked layer of plant leg, spring section and clamping leg is formed. These lie in an alignment approximately parallel to each other when the loop spring is compressed. In the relaxed state, clamping legs, spring section and bearing limb extend at an acute angle to each other. When the loop spring has three, four, five or more spring arcs, there are correspondingly two, three, four or more spring sections for connecting pairs of spring arcs. These several spring sections are then one above the other in layers in the space between the plant leg and clamping leg. Again, the spring portions and the clamping legs are aligned at an acute angle to each other when the loop spring is relaxed. Im squeezed, ie. tensioned state, it is conceivable that the spring portions are aligned approximately parallel to the clamping leg and plant leg and form a very compact layer package. With such a loop spring, which can also be called a meander spring, it is possible to compare the force element with a helical spring. Baren spring forces and with regard to the required travel much smaller and thus space-saving build. These advantages are particularly important in combination with conductor terminals for very large conductor cross sections. It is thus possible that the actuating arrangement can be arranged centrally in the region of the stirrup elements very close above the upper busbar part. The spring sections, which connect the lateral spring arcs with each other, lie close together between the actuating arrangement and the upper busbar part or the support. The lateral, slightly larger constituent spring arches, which provide the spring force e, len, can be taken advantage of appropriate free spaces.

However, such a loop spring with at least two spring arches is not only advantageous for the conductor connection terminal according to the invention with two parallel-connected busbar parts.

Independently of this, a conductor connection terminal for clamping an electrical conductor with an insulating material housing, a force element and a busbar arrangement is thus disclosed. The force element is

Exercise a clamping force on a clamped to the busbar assembly electrical conductor cooperatively formed. The clamping force can be applied directly or indirectly to the electrical conductor. The force element is then formed as a loop spring with at least two spring arcs, wherein the loop spring a plant leg at its first

25 has free end portion and a clamping leg at its opposite, second free end portion and is followed by a spring bow to the plant leg and a spring bow to the clamping leg. Opposite spring arcs are then connected via a spring section which extends in the intermediate space between the abutment leg and the clamping element.

Give 30! extends. A further force element, which is coupled to the first and second busbar part, may be provided at a region remote from the clamping point for the first electrical conductor. With the aid of this further force element, a frictional engagement of the first and second busbar part succeeds each other. The further force element can optionally also be used to clamp a further electrical conductor to a second terminal point of the busbar arrangement. This further force element can be designed as a separate clamping spring. It is also conceivable, however, that the force element is an integral part of one of the busbar parts, in order to effect a clamping connection between the two busbar parts. For example, the free end of one of the busbars can have a slot for forming two adjacent spring tongues. When the free end is then inserted into a mating opening of the other busbar part, the spring tongues cause a clamping force on the other busbar part.

For example, when inserting and clamping two opposing electrical conductors to the busbar parts, the insertion depth for the electrical conductors is not limited. Then, a wave spring may be provided extending between the first and second bus bar members and defining a boundary wall for limiting the insertion depth of an electrical conductor inserted between the first and second bus bar members. The wave spring then compensates for the change in distance caused by the relative mobility of the two busbar parts.

To open the nip or the terminal points for the at least one electrical conductor to be clamped, an actuating element against the clamping force of the force element acting with the first and second

Busbar part be connected. The actuating element can be designed, for example, as a pivotally mounted in the insulating housing actuating lever or a rotatable about a rotation screw cylinder. It is conceivable, however also that only one actuating opening in the insulating housing is provided for introducing a separate actuating tool which cooperates with the force element.

The invention will be explained in more detail with reference to embodiments with the accompanying drawings. Show it:

Figure 1 - sketch of a first embodiment of a conductor terminal clamp in side view;

Figure 2 - sketch of a second embodiment of a conductor terminal in side view;

Figure 3 - side sectional view through a further embodiment of the

Conductor terminal with right side clamped electrical see conductor;

FIG. 4 shows a sketch of the conductor connection terminal from FIG. 3 with the conductor connection open at the left side;

FIG. 5 shows a sketch of the conductor connection terminal from FIGS. 3 and 4 in a side sectional view with conductor connection opened on both sides;

Figure 6 - partial sectional view of another embodiment by a

Conductor terminal;

Figure 6a - sketch of a loop spring with at least two spring arches in

Connection with two busbars connected in parallel;

Figure 6b - sketch of a conductor terminal with loop spring with at least two spring arcs and a clamping leg for directly clamping an electrical conductor to a busbar part;

FIG. 7 shows a side partial sectional view through the conductor connection terminal

Figure 6a;

FIG. 8 shows a side sectional view of a further embodiment of a conductor connection terminal with a cage tension spring mounted on a fixed busbar part and a second busbar part tiltably arranged on the busbar part in the closed state;

Figure 9 - side sectional view through the conductor terminal of Figure 8 in the actuated, open state; Figure 10 - side sectional view through the conductor terminal of Figure 8 and 9 with inserted and clamped electrical conductor in the clamping state;

FIG. 11 shows a cross-sectional view through the busbar arrangement of the conductor terminal of FIGS. 8 to 10 in the region of the connection of the two busbar parts.

FIG. 1 shows a sketch of a first embodiment of a conductor connection terminal 1 in a schematic side view. In this embodiment of the conductor connection terminal 1, two electrical conductors 2a, 2b can be clamped from opposite sides to a busbar arrangement 3. The surrounding the busbar assembly 3 Isolierstoffgehäuse with the therein introduced as usual conductor insertion openings is not outlined. The busbar arrangement 3 has two mutually opposite and relatively movable busbar parts 4a, 4b, between which the stripped free ends of the electrical conductors 2a, 2b to be clamped are positioned. A force element 5 sketched by the arrows exerts a clamping force on the busbar arrangement 3 in order to clamp the electrical conductors 2a, 2b inserted between the busbar parts 4a, 4b on mutually opposite clamping edges 6 of the busbar parts 4a, 4b.

In order for an electrical parallel connection of the two busbar parts 4a, 4b is achieved, each of which is in electrically conductive contact with the clamping edges 6 with the electrical conductors 2a, 2b. Thus, the contact resistance is kept low even when clamping larger conductor terminal cross-sections, without having to increase the clamping force.

FIG. 2 shows another embodiment of the conductor connection terminal 1. This is provided for clamping only a single electrical conductor 2 to the busbar assembly 3. Again, with the power element ment 5 a clamping force on the two opposite and relatively movable busbar parts 4a, 4b exerted to clamp the electrical conductor 2 to the busbar assembly 3. While in the first embodiment, an electrical conductor 2a is in electrically conductive connection with the opposite electrical conductor 2b via the parallel-connected busbar parts 4a, 4b and thus one of the electrical conductors 2a and 2b forms a trap, in this embodiment, an arrester 7 at an electrical connection 8 of the two busbar parts 4a, 4b present. This arrester 7 can be formed, for example, by the extension of the first busbar part 4a or equally by the extension of the movable second busbar part 4b.

Again, the two busbar parts 4a, 4b are electrically parallel between see the electrical conductor 2 and the arrester 7 connected. Likewise, as in the first embodiment, the electrical properties are optimized without the clamping force of the two busbar parts 4a, 4b on the electrical conductor 2 to be clamped being substantially increased. FIG. 3 shows a further embodiment of a conductor connection terminal 1 in a side sectional view. This conductor connection terminal 1 in turn has a busbar arrangement 3, which is formed from a first fixed busbar part 4a and a second, movable busbar part 4b. There are provided two spaced-apart stirrup elements 9a, 9b, which have an opening for the passage of the first, fixed busbar part 4a and for the introduction of electrical conductors 2. On the side of the first busbar part 4a, which is opposite to the second busbar part 4b movably arranged relative to it, force elements 5 in the form of clamping springs are provided, which rest on the one hand on the stationary busbar part 4a and on the other hand on the yoke element 9a. These force elements 5 can, for example. As a U-shaped leg spring, as Shaft or loop spring (as in the left example), designed as a helical spring or the like.

The movable busbar part 4b is suspended on the side facing the force elements 5 in the bracket element 9a, 9b. For this purpose, engages under a respective crosspiece 10, which limits the passage opening in the bracket element 9a, 9b each end, the second busbar part 4b. By the spring force of the force elements 5, a force is exerted on the second movable busbar part 4b, which acts in the direction of the fixed first current rail part 4a.

In the illustrated state, an electrical conductor 2 is clamped on the right side by the clamping force of the right power element 5 between the first busbar part 4a and the second busbar part 4b. The left conductor connection is empty. As a result, the left bracket element 9b moves upward by the spring force of the left power element 5, so that the second busbar part 4b comes to bear against the stationary first busbar part 4a. If, for example, two such conductor connection terminals 1 are arranged next to one another and electrically conductively connected to one another via an electrically conductive connection of the fixed busbar parts 4a, then a current would be conducted via the parallel connection of the two busbar parts 4a, 4b to the adjacent conductor. When reversed direction of the same direction is the same. In the illustrated embodiment, it can be seen that the busbar assembly 3 is installed in an insulating 1 1. The insulating housing 1 1 has on the opposite sides of the conductor insertion openings 1 2, which lead to a respective clamping terminal 6 formed by the opposite busbar parts 4a, 4b clamping point for clamping an electrical conductor. It is also clear that the two busbar parts 4a, 4b which are movable relative to one another are connected to one another in a region between the two bracket elements 9a, 9b via a movable intermediate wall 13. This intermediate wall 13 forms a boundary wall for the inserted electrical conductor 2, so that it can not get to the opposite terminal point. This intermediate wall 1 3 may, for example, be designed as a wave spring.

FIG. 4 shows a state of the conductor connection terminal 1 from FIG. 3, in which the left clamping point is now displaced downward by displacement of the left bracket 9b against the clamping force of the left force element 5. Thereby, the left portion of the movable bus bar part 4b moves down from the fixed bus bar part 4a to open the nip point for inserting an electric conductor from the left side through the lead insertion opening 12 there.

On the right side, the right free end of the movable busbar part 4b, however, is pressed by the clamping force of the right power element 5 by means of the bracket member 9a to the fixed first busbar part 4a. Again, the two bus bar parts 4a and 4b are electrically connected in parallel between an electrical conductor 2 on the left side and the opposite Abieiter.

FIG. 5 shows the position of the conductor connection terminal from FIGS. 3 and 4 in the completely opened state or with electrical conductors 2a, 2b clamped on two mutually opposite sides and clamped on the two busbar parts 4a, 4b. This corresponds to the basic solution outlined in FIG. It becomes clear that the two busbar parts 4a, 4b that are movable relative to one another are electrically connected in parallel to the two electrical conductors 2a, 2b. are clamped. The clamping force is applied in each case by the two force elements 5, that is to say the two clamping springs which act on the movable second busbar part 4b via the associated bracket elements 9a, 9b. The force elements 5 are supported on the stationary busbar part 4a.

It can be seen that the stirrup elements 9a, 9b have feedthrough openings through which the electrical conductors are led. The lead-through openings are delimited at the free ends of the bracket elements 9a, 9b by transverse webs 1 0, on which the movable second busbar part 4b rests. In addition, the fixed first busbar part 4a is passed through the lead-through openings.

FIG. 6 shows a side partial sectional view of another embodiment of the conductor connection terminal 1. This is in principle comparable to the above-described variant. Again, 4b each bracket members 9a, 9b are provided at the opposite end portions of the movable second busbar part, in which the movable second busbar part 4b is mounted. These stirrup elements 9a, 9b are movable relative to the stationary first busbar part 4a, as is indicated by the second position of the busbar part 4b, which is shown in broken lines again.

It is also clear that an arranged between the first and second busbar part 4a, 4b in the central region wave spring an intermediate wall 13 is formed, which delimits the opposing conductor insertion openings 12 from each other and creates two insertion spaces for the electrical conductors 2a, 2b.

In the illustrated embodiment, another electrical conductor 14 can be clamped to the busbar assembly 3. This is achieved in that a further nip between the in the illustrated embodiment Example, two-layer trained fixed first busbar part 4a and a support 1 5 is provided for the force element 5. The force element 5 is again designed in the form of a loop spring, which is supported on the support 15 and exerts a spring force for clamping the additional electrical conductor 14 between the support 15 and the first conductor rail part 4a. The support 15 opposite free end of the force element 5 engages under the bracket member 9a so that a force is exerted on the bracket member 9a, which displaces the movable second busbar part 4b toward fixed first busbar part 4a, if the path is not blocked, for example by an electrical conductor is.

To open the nip an actuator assembly 16 is provided, for example in the form of a threaded pin assembly. The actuator assembly 16 is accessible from the top and can be rotated there with an operating tool. As a result, a threaded bolt 17 of the actuating arrangement 1 6 displaces counter to the clamping force of the clamping spring 5 and presses the bracket element 9a downwards in the direction of the first busbar part 4a. The force element 5 is thereby compressed. With a pivotally mounted in the insulating housing 1 1 locking lever 1 8, a stop for the threaded bolt 1 7 can be provided, which holds the actuator 16 in the open state as shown automatically. After insertion of an electrical conductor can be released by pivoting the locking lever 18 of the actuator assembly 16. Then, the threaded bolt 17 is pushed away from the fixed first bus bar part 4a by the clamping force of the power element 5, and the movable second bus bar part 4b moves upward in the direction of the fixed first bus bar part 4a by the force of the force element 5 and the yoke element 9a. The force acting on the then inserted electrical conductor clamping force is thus provided exclusively by the force element 5. Then the electrical conductor between the two busbar parts 4a and 4b is clamped, which are then electrically connected in parallel. FIG. 6 a shows a sketch of a conductor connection terminal 1 with a loop spring as a force element 5. The loop spring has three spring arcs 40a, 40b and 40c in the illustrated embodiment. It can be seen that adjoining a bearing limb 41 at the first free end section of the leg spring is the first spring bow 40a. The plant leg 41 is supported on the bracket element 9a. The first spring bow 40a is opposite to the second spring bow 40b and is connected thereto via a first spring portion 42a. The second spring bow 40b merges into a second spring portion 42b, which connects the second spring bow 40b with the third spring bow 40c. At the third spring bow 40c then a clamping leg 43 connects to the second free end portion of the leg spring.

The clamping leg 43 acts as outlined directly with the upper busbar part 4a or as shown in FIG. 6 indirectly with this upper busbar part 4a. At the lower transverse web 10 of the bracket element 9a, which is diametrically opposed to the abutment leg 41, the second busbar part 4b rests on. By the clamping force of more than two spring arches having leg spring an electrical conductor 2 is thus clamped between the two busbar parts 4a, 4b.

In this loop or meander spring, a substantially smaller and space-saving design is possible with spring forces comparable to a helical spring and a spring travel required in particular for connecting electrical conductor 2 with large conductor cross-sections. It can be seen that the contact leg 41, the two spring sections 42a, 42b and the clamping leg 43 are arranged in a very compact manner one above the other in layers. The spring portions 42a and 42b are located in the space between the clamping leg 43 and the plant leg 41st Thus, an actuating arrangement 1 6 can be arranged very close above the upper busbar part 4a. The spring sections 42a, 42b, which are opposite each other lie side by side between the actuating assembly 1 6 and the upper busbar part 4a and a support 15 shown in Figure 6 The lateral, slightly larger constituent spring arches 40a, 40b, 40c, which Provide the spring, are thereby conveniently taken up in appropriate open spaces.

FIG. 6b shows an alternative embodiment of a conductor connection terminal 1, in which again a loop spring having three spring arcs 40a, 40b, 40c is provided. In this embodiment, the electrical conductor 2 is clamped directly between a clamping edge on the clamping leg 43 and the busbar part 4a. In this conceivable use of a loop spring no two parallel busbar parts are present. Compared to a cage tension spring, which has only two bends, of which only one forms a spring bow for providing the spring force, at least two spring arcs 40a, 40b, 40c are present in the present variant. These are bent by a bending radius of far more than 90 ° and in the illustrated embodiment of more than 1 80 °, so that the spring portions 42a, 42b, which connect the opposing spring arches 40a, 40b and 40b and 40c with each other, are arranged in layers one above the other and positioned between the clamping leg 43 and the region of the clamping leg 43 immediately adjacent to the first spring bow 40a. The actuating arrangement 16 can be positioned above the region of the clamping leg 43 which merges into the first spring bow 40a. The spring arches 40a, 40b and 40c are received in the free space. The loop spring can also be very compressed here. As with a coil spring comparable spring force and the required for clamping large conductor cross-sections spring travel this loop spring can be constructed very small and space-saving.

FIG. 7 shows a front view of the conductor connection terminal 1 from FIG. 6 in FIG Recognize partial section. In this case, the conductor connection terminal 1 is in the idle state, in which the movable second busbar part 4b is displaced by the spring force of the force element 5 in the direction of the (two-layered) first conductor rail part 4a. It becomes clear that the movable second

Busbar part 4b is superimposed on the transverse web 1 0 of the bracket member 9a, which limits the conductor passage opening 19 for performing an electrical conductor. At the laterally limiting the passage opening 19 side webs 20 lugs 21 are provided with which the second busbar part 4b is secured to the bracket member 9a in terms of its location. A certain mobility between the second busbar part 4b and the yoke element 9a can still be possible.

With the help of the multiply bent loop spring as a force element 5, which have a bending radius of more than 200 °, a very flat spring is provided which can be compressed very strongly and has a large stroke.

FIG. 8 shows a further embodiment of the conductor connection terminal 1 according to the basic principle of FIG. 2. Here stands the fixed first busbar part 4a in a direct, electrically conductive, but movable connection 8 with the movable second busbar part 4b. It is clear that the force element 5 is formed by a cage tension spring which rests with its abutment leg 22 on the first busbar part 4a on the side opposite to the movable second busbar part 4b. At the plant leg 22, a spring bow 23 connects, which merges into an actuating limb 24. After another bend protrudes from the actuating leg 24 of the clamping leg 25 in the direction of the first busbar part 4a. The first busbar part 4a is thereby passed through a passage opening of the clamping leg 25 as well as the free end of the movable second busbar part 4b. The free ends of the first and second busbar parts 4a, 4b are formed to form a clamping edge 6 each angled.

In direct electrically conductive, fixed connection with the fixed first busbar part 4a is a surge arrester 26. This arrester 26 may, for example, by a tongue with a plurality of adjacent contact tabs are formed in order to reduce the contact resistance as compact as possible construction as far as possible.

FIG. 9 shows the conductor connection terminal 1 from FIG. 8 now in the actuated state. Here, an actuating tool 28 is guided into the conductor insertion opening 12 in the insulating housing 1 1 adjacent the actuating opening 27. The actuating tool 28 bears against the actuating limb 24 of the force element 5 in order to press the actuating limb 24 in the direction of the plant limb 22. As a result, the clamping leg 25 is displaced and the second busbar part 4b moves away from the first busbar part 4a. It works as it were through the mobile connection 8. Thus, an electrical conductor in the front conductor insertion opening 12 in the insulating housing 1 1 are passed through the usual in cage tensioning bushing opening in the clamping leg 25.

FIG. 10 shows the clamping state of the conductor connection terminal 1 from FIGS. 8 and 9. Here, an electrical conductor 2 is now inserted into the conductor insertion opening 12. The stripped end of the electrical conductor is now clamped between the clamping edges 6 on the mutually opposite busbar parts 4a, 4b. The movable second busbar part 4b is characterized by the force of the clamping spring of the force element 5, d .h. the cage tension spring is pressed in the direction of the first busbar part 4a. This is achieved by the fact that the second busbar part 4b rests on a transverse web 29 of the clamping leg 25 which delimits the passage opening in the clamping limb 25 at the end. It is clear that now the two busbar parts 4a, 4b are electrically connected in parallel to the electrical conductor. Via the electrically conductive, movable connection 8 of the two busbar parts 4a, 4b there is a parallel connection between the electrical conductor 2 and this electrically conductive connection 8 and the adjoining conductor 26.

FIG. 11 shows a side sectional view through the busbar arrangement 3 of the conductor connection terminal 1 from FIGS. 8 to 10. It is clear that the movable second busbar part 4b is hooked with its free end in the fixed first busbar part 4a. The busbar part 4a for this purpose has an opening into which the free end of the second busbar part 4b is immersed. The free end of the second busbar part 4b has a slot 30 through which two spring tongues 31 are formed. The two spring tongues 31 lie on a common plane. With the aid of this slot 30, the spring tongues 31 exert a clamping force when the free end of the second busbar part 4b is pressed into the opening in the first busbar part 4a. This ensures a good electrically conductive contact between the two busbar parts 4a, 4b with simultaneous mobility of the second busbar part 4b relative to the first busbar part 4a. In particular, it is possible for the second busbar part 4b to be tiltable relative to the first busbar part 4a.

Claims

claims:

1 . Conductor terminal (1) for clamping an electrical conductor (2, 2a) with an insulating housing (1 1), a power element (5) and a conductor rail arrangement (3), wherein the force element (5) with the busbar arrangement (3) for exerting a clamping force on the to the busbar assembly (3) clamped electrical conductor (2, 2a) is cooperatively formed, and wherein the busbar assembly (3) has two oppositely and relatively movably mounted busbar parts (4a, 4b) for clamping the electrical conductor (2, 2a ) between the two busbar parts (4a, 4b), characterized in that the two busbar parts (4a, 4b) are designed to stand in the clamped state in each case in a directly electrically conductive contact with the Abieiter (2b, 7, 26) and to provide a direct, electrically parallel connection between the clamped electrical conductor (2, 2a) and the conductor (2b, 7, 26).

Second conductor terminal (1) according to claim 1, characterized in that the two busbar parts (4a, 4b) are directly connected to each other positively or cohesively and are in direct electrically conductive contact with each other.

3. conductor terminal (1) according to claim 1, characterized in that the insulating housing (1 1) has two conductor insertion openings (12) for inserting in each case an electrical conductor (2 a, 2 b) to a are formed at the respective busbar parts (4a, 4b), and that the busbar parts (4a, 4b) are designed to make a direct, electrically parallel connection between the conductors inserted into the conductor insertion openings (12) and to the busbar parts ( 4a, 4b) clamped electrical conductor (2a, 2b) to provide.

Conductor terminal (1) according to one of claims 1 to 3, characterized in that the first busbar part (4a) relative to the insulating material (1 1) fixedly arranged and the second busbar part (4b) with respect to the first busbar part (4a) is arranged to be movable ,

Conductor connection terminal (1) according to one of the preceding claims, characterized by a bracket element (9a, 9b) arranged on the second busbar part (4b), wherein the clamping element (5) is arranged between the bracket element (9a, 9b) and the first busbar part (4a) , a clamping force between the first busbar part (4a) and the yoke element (9a, 9b) and a between the first and second busbar part (4a, 4b) acting clamping force for clamping an electrical conductor (2, 2a, 2b) to the first and second busbar part (4a, 4b) or for clamping the first and second busbar part (4a, 4b) causes each other.

Conductor terminal (1) according to any one of the preceding claims, characterized in that the force element (5) is a clamping spring having a bearing leg (22), a spring bow (23) and a clamping leg (25), wherein the clamping spring with its plant leg (22) directly or indirectly on the first busbar part (4a) is supported and with its clamping leg (25) exerts a spring clamping force on the said first busbar part (4a) opposite the second busbar part (4b).

7. conductor terminal (1) according to one of claims 1 to 5, characterized in that the force element (5) is a loop spring, a cage tension spring, a coil spring or a clamping screw.

8. conductor terminal (1) according to claim 7, characterized in that the force element (5) is a loop spring with at least two spring arcs (40a, 40b, 40c), wherein the loop spring a plant leg (41) at its first free end portion and a clamping leg (43) at its opposite, second free end portion and a spring bow (40a) to the abutment leg (41) and a spring bow (40c) to the clamping leg (43) connects, and wherein opposing spring arches (40a, 40b, 40c) via a spring portion (41 a, 42 b) are connected, which extends in the space between the plant leg and the clamping leg.

9. conductor terminal (1) according to any one of the preceding claims, characterized in that a further force element is coupled to the first and second busbar part (4a, 4b) at one of the clamping point for the electrical conductor (2, 2a) remote area to a frictional contact of the first and second busbar part (4a, 4b) to cause each other or exert a clamping force on another at a second terminal point of the busbar assembly (3) clamped electrical conductor (2b).

10. conductor terminal (1) according to any one of the preceding claims, characterized in that between the first and second busbar part (4a, 4b), a wave spring extends, wherein the wave spring has a boundary wall (13) for limiting the insertion depth of one between the first and second Busbar part (4a, 4b) inserted electrical conductor (2, 2a, 2b) forms. Leiteranschlussklennnne (1) according to any one of the preceding claims, characterized in that an actuating arrangement (16) against the clamping force of the force element (5) acting in the insulating housing (1 1) is arranged.

Conductor terminal (1) according to claim 1 1, characterized in that the actuating arrangement (16) is a pivotally mounted in Isolierstoffgehäu se operating lever or a rotatable about a rotation screw cylinder.

Conductor terminal (1) for clamping an electrical conductor (2, 2a) with an insulating housing (1 1), a force element (5) and a conductor rail arrangement (3), characterized in that the force element (5) has a loop spring with at least two spring arcs ( 40a, 40b, 40c), wherein the loop spring has a contact leg (41) at its first free end portion and a clamping leg (43) at its opposite, second free end portion and a spring bow (40a) to the plant leg (41) and a Fedelfogen (40c) to the clamping leg (43) connects, and wherein opposing spring arches (40a, 40b, 40c) via a spring portion (41 a, 42 b) are connected, which extends in the space between the abutment and the clamping leg.