EP2729991A1

EP2729991A1 - Electrical connection terminal

Info

Publication number: EP2729991A1
Application number: EP12737199.5A
Authority: EP
Inventors: Andreas Wendt
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2011-07-04
Filing date: 2012-06-18
Publication date: 2014-05-14
Anticipated expiration: 2032-06-18
Also published as: US9425519B2; CN103636067A; DK2729991T3; IN2014CN00831A; ES2559826T3; JP2014518436A; DE102011106432A1; CN103636067B; WO2013004343A1; JP5763840B2; EP2729991B1; US20140134892A1

Abstract

The invention relates to an electrical connection terminal comprising a holder and a clamping lever pivotably arranged on said holder and having a clamping unit for clamping a conductor between the clamping unit and a current bar. A manual lever is provided which is pivotably accommodated on the clamping lever in order to enable a dynamic transformation ratio in the closing operation.

Description

Electrical connection terminal

The present invention relates to an electrical

Terminal, and in particular a tilting lever clamp for connecting a conductor.

In the prior art are various electrical

Terminals have become known, which are suitable for connecting conductors, even large diameter. For example, it is possible to conductor even with large cross sections

To connect screw terminals. The conductor is connected to the electrical connection terminal via a screw connection

clamped. A disadvantage of such screw terminals, however, is that a simple pivoting of the stripped conductor from above is not readily possible. This results in particular in large conductor cross sections and solid conductors to the fact that the assembly is difficult because the conductor must be bent and must be inserted axially from the front into the screw.

On the other hand, mounting is easier with an electrical connection terminal, which allows the pivoting of a

allowed to be connected from above. As a result, the conductor to be connected can be previously shortened to the appropriate length and can be easily pivoted during assembly.

It is therefore an object of the present invention to provide an electrical terminal, which is easy to assemble and allows reliable contacting of a conductor to be connected.

This problem is solved by an electrical

Terminal with the features of claim 1.

CONFIRMATION COPY Preferred developments of the invention

Terminal are specified in the subclaims.

Further advantages and features of the present invention will become apparent from the general description and from the description of an embodiment.

The electrical terminal according to the invention comprises at least one holder and at least one clamping lever pivotally arranged thereon with at least one clamping unit for clamping at least one conductor between the clamping unit and a current bar. It is provided a hand lever which is pivotally received on the clamping lever to a

enable dynamic transmission ratio during closing and a high clamping force.

The electrical terminal according to the invention has many advantages, as it is a simple and flexible

Provides connection possibility for electrical conductors and allows a secure contact. By the swiveling

arranged clamping lever, it is possible to open the electrical connection terminal according to the invention wide, so that an electrical conductor to be connected from above into the

open terminal can be swung in. The clamping state is then by pivoting the

Clamping lever causes.

Through the interaction of the hand lever and the clamping lever, a dynamic transmission ratio is achieved, so that the leverage at the beginning of the closing operation causes a large movement of the clamping lever even with a relatively small movement of the hand lever, while at the end of

Closing a large movement of the hand lever only leads to a relatively small movement of the clamping lever. This makes it possible to transmit high clamping forces, so that subsequent conductors with large cross-sections can be contacted safely and reliably. In addition, it is possible to differentiate leaders

Connect cross sections reliably and safely.

In a preferred embodiment, the hand lever and the clamping lever are arranged such that a self-locking of the clamping state is effected. If the hand lever is transferred in this embodiment of the open state in the clamping state, a dead center is exceeded. The hand lever is in the clamped state in such a position, in the first force must be applied to the

Move hand lever from the clamping state in the open state.

In particularly preferred embodiments, at least one auxiliary lever is provided which connects the hand lever pivotally connected to the holder. Preferably, two auxiliary levers are provided, which are arranged in particular symmetrically on both sides of the housing or on both sides of the holder. The at least one auxiliary lever is a particularly effective transmission ratio and a dynamic

Change of gear ratio possible.

Particularly preferably, one side of the auxiliary lever is pivotally held on the holder. Another side of the auxiliary lever is preferably pivotally connected to the hand lever. It is possible that the pivot points of the auxiliary lever in each case close to the respective ends of the auxiliary lever

are arranged. But it is also possible that the

Pivot points on one side and on the other side of the Help lever have a considerable distance from the respective end of the auxiliary lever.

In particularly preferred embodiments, the hand lever is pivotally connected at one end to the clamping lever and at another end pivotally connected to the auxiliary lever. Under the

The term "at the end" in the sense of the present application is also a clear distance from the absolute end of the

Hand levers to understand. Thus, distances of 20 or 30% of the total length to the respective pivot point are possible. The total length is determined from the for the

Pivoting functionally required length, so that the definition of the ends to be functional for the

Swivel process required length refers.

By such a configuration in which the auxiliary lever is pivotally connected at its sides or ends to the holder or the hand lever and in which the hand lever is in turn connected to the clamping lever and the auxiliary lever, results in a particularly advantageous embodiment, which is a simple Operation at very high clamping forces possible.

In preferred developments, the clamping unit comprises at least one clamping foot and / or at least one clamping point and / or at least one clamping point. For example, it is possible that the clamping unit comprises a clamping foot or a plurality of clamping feet, each clamping foot having a clamping prong or a plurality of clamping prongs, which leads to a particularly secure hold of the clamped conductor to the electrical

Lead the terminal. But it is also possible that in addition to the clamping prongs or instead of clamping jaws terminal points are provided, which are in the material of the Burner buried to a high pull-out

to reach .

In all embodiments, it is preferred that at least one spring device is provided in order to

To counteract subsidence phenomena. It is possible that the electrical terminal itself or at least some parts or components thereof

Cause or at least contribute to the spring action of the spring device.

Particularly preferred is the spring action of

Spring device at least partially generated by at least one component of a group of components, said group of components comprising the holder and the hand lever and the auxiliary lever. For example, the entire

Spring effect can be generated by the terminal itself and by the involved components, without a spring in the form of, for example, a spiral or leaf spring or the like is present. By the housing itself and the components involved in the electrical terminal a very high spring stiffness is provided, which ensures a reliable grip even with large conductor cross-sections. Settling phenomena are reliably compensated.

In preferred developments, it is possible and preferred for the spring device to have at least one clamping spring

wherein at least one clamping spring is preferably provided on the clamping unit. It is also possible and preferred for a plurality of clamping springs, in particular designed as leaf springs, to be provided on the clamping unit. Such particular parallel leaf springs increase the spring force with increasing deflection, so that a larger spring force is applied for large conductor cross sections than for smaller conductor cross sections. In addition or instead of clamping springs on the clamping unit and in particular the clamping foot of the clamping lever may also be provided at least one spring unit which

especially from below against the current bar presses.

For example, the clamping unit above the

Current bar can be provided and the spring unit can be arranged below the current bar. In such a

Embodiment is applied from above by the clamping unit pressure on the located between the clamping unit and the current bar conductor while the current bar is pressed from below by the spring unit against the head.

It is also possible that the conductor below the

Power bar is inserted so that the current bar is pressed by the clamping unit against the head.

It is particularly preferred if the hand lever a

Having tool holder. For example, the hand lever may have an insertion opening for a tool, so that a tool such as a screwdriver or

The like can be inserted into the hand lever. This lengthens the effective length of the hand lever so that a much greater force can be applied with the hand lever. At the same time, the operation is facilitated by the insertion of a tool in the hand lever.

In all embodiments, it is preferred that the hand lever and / or the holder and / or the auxiliary lever in each case

Essentially or even completely from one or the other consist of several curved metal strips. Such

Design allows a stable structure of

inventive terminal, wherein the production is simple and inexpensive.

Preferably, the holder has at least one stop for the auxiliary lever and / or the hand lever. As a result, a defined closed position is provided because the hand lever must be moved until the auxiliary lever and / or the hand lever itself strikes the stop of the holder.

It is also possible, at least one stop for the open state is provided to limit the opening movement. In all forms it is special

preferred that at the end of the closing process a high

Power transmission is present on the hand lever

applied force to a considerable extent increasingly transmitted to the clamping lever.

Particularly preferably, the hand lever is so on the

Clamping lever received and it is the auxiliary lever connected to the hand lever and the holder such that a dynamic translation of the travel conditions when closing and the

Open takes place.

In all embodiments, preferably at least one insulating layer and / or an insulating housing are provided to isolate the electrical terminal to the outside.

The proposed electrical terminal provides a tilting lever clamp with a dynamic leverage available, wherein when swiveling in the terminal current conductor is pressed on the current bar. Due to the dynamic leverage is in an upper pivot range, in which no large force is needed, in particular a lever reduction provided. This means that a small pivoting movement of the hand lever causes a relatively large pivoting movement of the clamping lever. In the area in which the conductor is clamped, a sliding leverage sets, so that a large

Pivoting movement of the hand lever causes a relatively smaller movement of the clamping lever. In a corresponding manner, a higher pressure force is applied to the conductor. The use of spring elements allows a certain elasticity of

Construction and thus also the operation with different conductor cross sections. At the same time, the setting behavior of the conductor is compensated. By overcoming a dead center, a secure clamped state is achieved.

Further advantages and features of the present invention will become apparent from the description of the embodiment, which will be explained with reference to the accompanying figures below.

In the figures: FIG. 1 shows a schematic representation of a terminal block with a plurality of electrical according to the invention

Clamp connection;

Fig. 2 is a front view of an electric

Connection terminal;

Fig. 3 is a perspective view of an opened one

Terminal according to FIG. 2; the clamping lever of the terminal of Figure 3 in a side view. the clamping lever of Figure 4 in a plan view. the hand lever of the terminal of Figure 3 in a perspective view. a side view of the auxiliary lever of

Connection terminal according to Fig. 3; the holder of the electrical terminal of Fig. 3; the electrical terminal of Figure 3 in the closed state in a cross section. a side view of the terminal of Figure 9 in the uncut state. the terminal of Figure 3 in a wide open state. the terminal of Figure 3 in a partially closed state. and the terminal of Fig. 3 in an almost closed state.

Figure 1 shows a terminal block 100 according to the invention with a plurality of electrical according to the invention

Terminals 1, here each as a tilting lever clamp are executed and a dynamic leverage

exhibit. Each individual terminal 1 has an insulating housing 21, which as a one-piece housing

may be formed or consists of several parts to effect the desired electrical insulation effect.

A hand lever 7 is used to operate each one

electrical terminal 1. In the clamped state is a - not shown in Figure 1 conductor - in the

Conductor receiving space 8 is recorded clamped.

For actuating the hand lever 7, a tool holder 22 is provided on the hand lever 7. The tool holder here comprises an opening at the front end of the hand lever 7, through which a tool such as a screwdriver can be inserted into the hand lever 7. At the rear end of the hand lever, a slot 24 is provided, which is not visible here in Figure 1 and on which the tool can be fixed so that the hand lever 7 is moved by a pivoting movement of the screwdriver. As a result, considerably more force can be applied via the hand lever 7 than without the insertion of a tool or a rod or the like. Figure 2 shows a front view of an electrical terminal 1 according to the invention, which can be used individually or is part of the terminal block 100 of Figure 1.

The terminal 1 is surrounded outside of the insulating housing 21. The terminal 1 has a holder 2, on which a clamping lever 3 is pivotally mounted. Of the

Clamping lever 3 has a clamping unit 4, which here comprises a clamping foot 9. With the clamp foot 9 is in the Conductor receiving space 8 inserted conductor by clamping between the clamping foot 9 and the current bar 6 was added.

As can be seen in Figure 2, the hand lever 7 has a tool holder 22 with an opening through which the slot 24 at the rear end of the hand lever 7 is visible. An inserted into the opening 22 screwdriver can be snapped into the slot 24 and thus allows a defined guidance of the hand lever 7 on the pivotal movement of the inserted screwdriver.

The hand lever 7 is connected via two auxiliary lever 12 with the holder 2 here. The function of these components will be explained in more detail with reference to the other figures.

FIG. 3 shows a perspective view of a

Terminal 1 without the insulating components surrounding the terminal 1. On the holder 2, a current bar 6 is added. About a pivot axis 25 of the clamping lever 3 is pivotally received on the holder 2. In Figure 3, a partially opened state 11 is shown, in which the clamping lever 3 has been pivoted a considerable amount upwards. The clamping lever 3 is about the pivot axis 25th

swiveling.

On the pivot lever 3, a pivot axis 26 is provided, which is the rear pivot axis 26 of the hand lever. In addition, the hand lever 7 on the front pivot axis 28th

pivotally received against the two auxiliary levers 12. Each auxiliary lever 12 is on one side 13 over the

Swivel axis 27 pivotally received on the holder 2, while on the other side 14 of the auxiliary lever 12 the Swivel axis 28 is provided as a front pivot axis of the hand lever 7.

Overall, there are four points of articulation, over the four

Components, namely the holder 2, the clamping lever 3, the hand lever 7 and the or the auxiliary lever 12 articulated

connected to each other. The distance is the

Pivot axes 27 and 28 of an auxiliary lever 12 is smaller than the distance of the pivot axes 26 and 28 of the hand lever 7. The distance between the pivot axes 25 and 27 on the holder 2 is in turn greater than the distance of the pivot axes 25 and 26 on the clamping lever. 3

By choosing the geometry and the individual lengths, a dynamic adjustment of the transmission ratio of the lever movement and the lever forces is effected. At the beginning of the closing operation, a relatively small movement of the hand lever 7 causes a relatively large closing movement of

Clamping lever 3, while at the end of the closing operation, a relatively large movement of the hand lever 7 only leads to a relatively small closing movement of the clamping lever 3, so that a high power transmission is achieved towards the end of the closing operation. Figure 4 shows the clamping lever 3 in a lateral

Presentation. At the front end of the clamping lever 3 is the

Clamping unit 4 arranged with the clamping foot 9, wherein the

Increasing the pull-out clamping jaws 17 are provided on the clamping foot 9.

To achieve and reinforce a resilient effect, a spring device 18 is provided here, which has several Clamping springs 19 has, which are designed here as leaf springs and extend parallel to each other.

The clamping lever 3 is provided pivotably about the pivot axis 25, wherein here in the clamping lever 3, a through hole is provided. The pivot axis 26 for pivoting the hand lever 7 here comprises stub axle on the outside of the clamping lever 3. On this stub axle corresponding openings of the hand lever 7 are plugged to connect the hand lever 7 pivotally about the pivot axis 26 with the clamping lever 3.

Figure 5 shows a corresponding plan view of the

Clamping lever 3.

FIG. 6 shows a slightly perspective view of the

Hand lever 7, wherein the holes or holes in the

Swivel axes 26 and 28 are clearly visible. At the rear or one end 15 of the hand lever 7, the pivot axis 26 is provided, while at the front or other end 16, the pivot axis 28 of the hand lever 7 is arranged. Of the

Hand lever 7 consists here of a total of a curved

Metal strip, but can also consist of other materials. To facilitate the bending process holes 31 may be provided at the bending edges.

Figure 7 shows a side view of an auxiliary lever 12 in which on one side 13 and at one end the pivot axis 27 is provided, while on the other side 14 and at the other end, the pivot axis 28 is provided. At both pivot axes 12 holes are here in the auxiliary lever

provided on the corresponding stub axle on the holder. 2 or the clamping lever 3 are plugged to connect the components against each other pivotally.

Figure 8 shows a side view of the holder 2, which has at the location of the pivot axis 25 here via a bore, while at the location of the pivot axis 27 stub axle

stand laterally out of the holder 2 out. The current bar 6 is clamped at one end by a bend 32 of the holder.

The sliding stopper 30 will be described with reference to FIG. 9

explains. Figure 9 shows a cross section through a

mounted terminal 1 in the clamping state 10. The current bar 6 is held by the bend 32 on the holder 2. The clamping lever 3 is pivotally received over the pivot axis 25 relative to the holder 2, so that by a pivoting movement of the clamping lever 3 against the

Clockwise leaving the clamping state 10 shown in Figure 9 and the terminal is transferred, for example, in the open state 11 shown in Figure 3.

Clearly visible are the clamping springs 19 at the front end, where the clamping foot 9 is arranged.

Shown here only by dashed lines is the pivot axis 26, which is spatially in front of the one auxiliary lever 12

Cutting plane and for the other auxiliary lever 12 is located behind the cutting plane.

Below the current bar 6 is a spring unit 20th

provided which presses from below against the current bar 6. The spring unit 20 is designed here as a bent sheet metal strip and is at the stop 29 by bending

clamped while the spring unit to the stop 30 resilient can slide up over the slope to create the spring action.

FIG. 10 shows the uncut state of FIG

Terminal 1 according to FIG. 9 in the clamped state 10.

In this state, the auxiliary lever 12 is located with a part of its lever length on the stop 23 of the holder. The stopper 23 represents an end stop, which determines the clamped state. In this position results in a

self-locking position of the hand lever 7 and the clamping lever 3. During the movement from the open state 11 in the clamping state 10, a dead center is exceeded, so that first force is required to solve this condition.

With reference to FIGS. 11 to 13, the function of the electrical connection terminal 1 during the closing process will be explained. Figure 11 shows a wide open state 11, in which a pivoting of a conductor to be connected 5 from above is very easy. In this case, the conductor 5 does not have to be bent and inserted through a front opening, but can simply be pivoted from above into the wide-open terminal 1 until the conductor rests approximately on the current bar 6.

Following this, the hand lever 7 is pivoted, for example, after insertion of a tool in the tool holder 22 from the open state in the direction of the clamping state, thereby initially in an accelerated manner the clamping lever 3 from the wide open state of Figure 11 in a partially opened state, as shown in Figure 12, is pivoted.

For the sake of clarity, some components have been omitted in FIGS. 11 to 13. Thus, in particular, only one of the auxiliary lever 12 is located.

In the state shown in FIG. 12, the hand lever has relatively little movement relative to the state shown in FIG. 1, while the clamping foot 9 of the clamping lever 3 has already moved considerably further in the direction of the current bar 6.

In the further movement of the hand lever 7 in the direction of the clamping state 10, the clamping foot 9 of the clamping lever 3 moves only relatively little, whereby a relatively high

Power transmission is effected. The on the hand lever 7

applied clamping force is transmitted to an enlarged scale on the clamping foot of the clamping lever. As a result, are high

Clamping forces possible.

Due to the resilient action of the individual components of different sizes conductor cross-sections can be reliably and safely clamped, which allows safe and easy operation of the electrical terminal 1. The clamping springs 19 allow a defined spring action.

A separate lock is at the electrical

Terminal 1 is not necessary, since by overcoming the dead center in the pivoting movement of the open state 11 in the clamping state 10, a self-locking is achieved. ugszeichenliste

Electrical connection terminal 1

Holder 2

Clamping lever 3

Clamping unit 4

Head 5

Current bar 6

Hand lever 7

Conductor receiving space 8

Clamp foot 9

Clamping state 10

Open state 11

Auxiliary lever 12 one side 13 another side 14 one end 15 other end 16

Clamping point 17

Spring device 18

Clamping spring 19

Spring unit 20

Insulating housing 21

Tool holder 22

Stop 23

Slot 24

Pivot axis 25

Pivot axis 26

Pivot axis 27

Pivot axis 28

Stop 29

Stop 30

Hole 31

Bend 32

Terminal block 100

Claims

claims

1. Electrical connection terminal (1) comprising a holder (2) and at least one clamping lever (3) pivotally arranged thereon with at least one clamping unit (4) for clamping at least one conductor (5) between the clamping unit (4) and a current bar (6). .

characterized,

in that a hand lever (7) is provided, which is pivotally received on the clamping lever (3) to a

enable dynamic transmission ratio during closing and a high clamping force.

2. Terminal (1) according to claim 1, wherein the

Hand lever (7) and the clamping lever (3) are arranged such that a self-locking of the clamping state (10) is effected.

Third terminal (1) according to claim 1 or 2, wherein an auxiliary lever (12) is provided, which connects the hand lever (7) pivotally connected to the holder (2).

4. Terminal (1) according to claim 3, wherein the

Auxiliary lever (12) on one side (13) pivotally supported on the holder (2) and on another side (14) pivotally connected to the hand lever (7).

5. terminal (1) according to claim 3 or 4, wherein the hand lever (7) at one end (15) pivotally connected to the clamping lever (3) and at another end (16)

pivotally connected to the auxiliary lever (12).

6. Connection terminal (1) according to one of the preceding

Claims, wherein the clamping unit (4) at least one Clamping foot (9) and / or at least one

Clamping pin (17) and / or at least one clamping tip comprises.

Terminal (1) according to one of the preceding

Claims, wherein at least one spring device (18) is provided.

A terminal (1) according to the preceding claim, wherein at least one component at least contributes to the spring action of the spring means (18), the at least one component being taken from a group of components comprising the holder (2) and the hand lever (7) and the auxiliary lever (13).

Connection terminal (1) after one of the two

preceding claims, wherein the clamping unit (4) has at least one clamping spring (19).

Terminal (1) according to one of the preceding

Claims, wherein the clamping unit (4) above the current bar (6) is provided and wherein at least one spring unit (20) below the current bar (6) is provided.

Terminal (1) according to one of the preceding

Claims, wherein the hand lever (7) a

Tool holder (22).

Terminal (1) according to one of the preceding

Claims, wherein the hand lever (7) and / or the holder (7) and / or the auxiliary lever (13) consists essentially of a bent metal strip (23).

13. Terminal (1) according to one of the preceding claims, wherein the holder (2) at least one

Stop (23) for the auxiliary lever (12) and / or the hand lever (7).

14. Terminal (1) according to one of the preceding

Claims, wherein at the end of the closing process is a high power transmission.

15. Terminal (1) according to one of the preceding

Claims, wherein the hand lever (7) on the

Clamping lever (3) recorded and the auxiliary lever (12) is connected to the hand lever (7) and the holder (2) such that a dynamic translation of the travel conditions occurs when closing.