CN1518784A - electrical connection clamp - Google Patents

Abstract

The invention is to provide a terminal (1) comprising a first clamping element (2), a pressure part (4), a terminal screw (5) and a clamping frame (6), which has a first receiving area (7) for at least one conductor and in which a clamping piece (8) is located, with an additional connection option. To achieve this, the clamping piece (8) has a second receiving area (9) for at least one additional conductor, thus forming a second clamping element (3).

Description

electrical connection clamp

The invention relates to a terminal clamp with a first clamping device, which is provided with a pressure element, a clamping screw and a clamping frame, wherein the clamping frame has a device for at least A first cavity for a wire and a clamping part arranged in the cavity.

A terminal or connection clamp is used to connect, make and tap one or more circuits that are not interrupted according to operational requirements.

From DE 693 02 103 T2 known a kind of terminal clip that is designed as universal terminal clip.

The technical problem to be solved by the present invention is to propose a terminal block that offers other connection possibilities.

In the terminal clip known from the prior art, a compartment is divided, so that multiple connection possibilities exist. The idea of the invention based on this idea is to form within this divided volume a further volume, which also contains the clamping part, which hitherto has only been used as a fixed contact.

The aforementioned technical problem is solved by a terminal clamp of the type mentioned at the outset, wherein according to the invention the clamping part has a second receptacle for at least one other conductor, thus forming a second clamping device.

In addition to the possibility of connecting a conductor in the first cavity of the first clamping device, it is also possible to clamp another conductor, in particular with a different structure, size and position, in the first cavity of the first clamping device. Possibility in the second cavity of the second clamping device. It is therefore possible to dispense with a standardized wiring hole. Furthermore, the clamping part according to the invention permits a simple and thus cost-effective expansion of the second clamping device. However, a conventional connection possibility is essentially only realized in the first cavity of the first clamping device. The invention is particularly applicable to series-mounted devices, such as a relay, a contactor, a line protection switch, a circuit breaker or a motor protection switch.

In a preferred embodiment, the clamping part has a profile shape with a longitudinal plate and a transverse plate, whereby a geometrically advantageous embodiment can be achieved by simple means. This is mainly related to the configuration of the second cavity, the function of the transverse plate as the corresponding pressure plate of the pressing member and the role of the longitudinal plate as the relatively movable stripping insulation layer and clamping element.

Advantageously, the second cavity has a shape similar to a lock hole, so that a wire introduced into an introduction section of the cavity passes through the relative gap between the clamping frame and the clamping piece. The movement is squeezed into a constricted section and thus the insulation may be removed and clamped.

The clamping frame is advantageously provided with an opening for the passage of the longitudinal plate of the clamping element. The combination of the precisely fitting holes with the longitudinal plates of the clamping member forms an efficient shearing element which facilitates removal of insulation and clamping of the conductor.

The clamping part is expediently designed to be fastened to the housing. This makes it possible, on the one hand, to position the terminal clip in a housing and, on the other hand, to form an electrically conductive connection to a device or the like.

Advantageously, the clamping part is designed as an insulation stripping element, so that uninsulated conductors can also be introduced into the second cavity of the terminal clamp and can be deinsulated during the clamping process. layer, and can be clamped.

Further advantages and details of the invention are explained in greater detail below with reference to the drawings. In the attached picture:

Figure 1 shows a terminal clamp with a first clamping device and a second clamping device in side view,

Figure 2 shows a terminal clip shown in Figure 1 in a cross-sectional view,

Figure 3 shows a clamping part of a terminal clamp shown in Figure 1 in a side view,

Fig. 4 shows the expansion situation of the clamping part shown in Fig. 3 with a top view,

5 to 7 show different views of the terminal block shown in FIG. 1 in a section of a housing.

In the following description, the same components in the respective drawings are denoted by the same reference numerals or components having the same meaning are denoted by similar reference numerals.

1 and 2 show a terminal clamp 1 with a first clamping device 2 and a second clamping device 3 . The first and second clamping devices 2 and 3 are provided with a pressure element 4 and a clamping bolt 5 . The first and second clamping devices 2 and 3 have a common clamping frame 6 . The first clamping device 2 is provided with a first cavity 7 for at least one conductor.

A clamping part 8 with a second cavity 9 for at least one other conductor is accommodated in the first cavity 7 , whereby the second clamping device 3 is formed. The clamping part 8 here has a profile shape with a longitudinal plate 10 and a transverse plate 11 , wherein the second receptacle 9 has a shape similar to a horizontally mirror-symmetrical locking hole. Furthermore, the clamping frame 6 is also provided with an opening 12 for receiving the longitudinal plate 10 of the clamping part 8 . The shape, configuration and dimensions of the bore 12 of the clamping frame 6 are adapted to the possibly variable geometry of the longitudinal plate 10 in such a way that a precise fit can be produced. In addition, at least one cutting edge 13 is designed on the contour of the hole 12 .

The pressure part 4 is formed U-shaped by a first and a second web section 14 and 15 , wherein a head for the clamping bolt 5 is arranged in the first web section 14 The first guide structure 16 of the part 17. The second web section 15 serves as a seat 18 for the end 19 of the clamping bolt 5 opposite the head 17 . In this case, the clamping bolt 5 is arranged between the two web sections 14 , 15 . The second web section 15 engages in a clamping frame 6 arranged perpendicularly to the pressing part 4 . The clamping frame 6 has a guide structure 20 with an internal thread in which the clamping bolt 5 is guided.

The two clamping devices 2 and 3 and the associated receptacles 7 and 9 are closed, wherein the first clamping device 2 and the first receptacle 7 are generally used for clamping and mounting of generally existing Pre-prepared leads. Compared with the first clamping device 2 and the first cavity 7, the second clamping device 3 and the second cavity 9 are also used for installing wires whose insulation layer has not been removed. Since the first chamber 7 contains the second chamber 9, the first chamber 7 can also be divided by itself.

The spaces in front of and behind the longitudinal panels 10 can also provide another connection possibility instead of using the second cavity 9 .

By screwing or tightening the clamping screw 5 , there is a synchronous movement with the pressure part 4 towards the clamping part 8 . By continuing to tighten the clamping bolt 5 , the pressing part 4 is directly pressed against the transverse plate 11 of the clamping part 8 . As a result, the clamping element 8 is moved through the hole 12 , at which point the clamping frame 6 and the pressing element 4 move relative to each other and thus the second cavity 9 becomes smaller. A clamping is thus forcibly performed for an inserted conductor. Advantageously, a wire clamped in the second cavity 9 does not involve a previously clamped wire in the first cavity 7 . This also applies to clamping conductors of different sizes. The terminal clamp 1 thus offers some connection possibilities which are not affected by relative movements.

The second receptacle 9 has an introduction section 21 and a narrowing section 22 adjoining it. When an uninsulated wire is located in the lead-in section 21 of the second cavity 9, the wire is pressed into the narrowed section 22 through the movement process described above, so that The insulation of the wire is severed by said knife edge 13 . By means of the pressure transmitted to the conductor by means of the clamping part 8 and the clamping frame 6, the insulating layer on the side opposite the narrowed section 22 is in contact, especially along the clamped conductor. The sides of the site split and slide sideways.

This makes gas-tight contacting of the conductors in the event of deformation of the wire core. The cutting edge 13 can extend from the insertion section 21 as far as the narrowing section 22 , thereby forming an additional quasi-form closure that prevents the wire from being pulled out. The cutting edge 13 can be designed as a special material and/or as a contact surface.

When a wire is placed in the first cavity 7 of the first clamping device 2 , the pressing member 4 is pressed against the wire when the clamping bolt 5 is further tightened. The wire is grounded adjacent to the clamping part 8 and transmits the clamping pressure to the clamping part 8 , thereby actuating the first and second clamping devices 2 and 3 . This clamping process can also be carried out without a wire being installed in the second cavity 9 . Here, the clamping part 8 is pushed with its longitudinal plate 10 through the opening 12 until its transverse plate 11 bears against the bottom surface of the clamping frame 6 . This produces a sufficiently high counter pressure necessary for clamping the wire. Thus, the clamp 1 can be used to clamp the conductors and if necessary to remove the insulation and to clamp the conductors, wherein the first cavity 7 can also function normally when the second cavity 9 is not used and vice versa The same is true.

In the non-operated position of the terminal clamp 1, the so-called rest position, the clamping member 8 can be automatically held in the One of the clamping frames 6 is used in the necessary horizontal position for introducing the wire. When the terminal clamp 1 is actuated by tightening the clamping bolt 5, the two clamping devices 2 and 3 are activated. The clamping part 8 returns to its starting position only when the clamping screw 5 is loosened. To some extent it can also be said that the clamping device 3 is always trying to return to its original position by means of an elastic restoring force.

FIG. 3 shows a clamping part 8 designed as a molded part shown in FIG. 1 in a side view, and FIG. 4 shows the unfolded shape of the clamping part 8 shown in FIG. 3 in plan view.

FIG. 5 shows a perspective view of the terminal clip 1 shown in FIG. 1 in a cutaway housing section. Therein, it is shown that the first and second clamping devices 2 and 3 are each connected to a wire which is introduced into the corresponding receptacle 7 and 9 . 6 and 7 show the connection clip 1 according to FIG. 5 in a side view and a sectional view, respectively. The transverse plate 11 can also be developed, for example, as a contact shoulder and as a position-fixed connection part of the device or fastened to the housing.

It is clear from the above description that the two receptacles can be used independently of one another and freely.

The central idea of the above concept is that the linear movement caused by tightening the clamping screw 5 is advantageously used in two different ways to clamp a conductor and/or to remove the insulation of the conductor and/or to make contacts a wire.

The terminal clamp 1 is a combination of a conventional clamping device and a further clamping device with an insulation stripping or contact-making device. This combination terminal clamp also works just as well when applied as a single clamping device.

In addition, such a terminal clip can also be used in a relay, a contactor, a series device, a circuit breaker, a circuit breaker or a motor protection switch.

Claims (6)

1. A terminal clamp (1), which has a first clamping device (2), a pressing piece (4), a clamping bolt (5) and a clamping frame (6), the clamping frame There is a first cavity (7) for at least one wire and a clamping part (8) is arranged in the first cavity (7), characterized in that the clamping part (8) has a A second cavity (9) for at least one further conductor thus forming a second clamping device (3). 2. The terminal clamp according to claim 1, characterized in that the clamping part (8) has a profile shape with a longitudinal plate (10) and a transverse plate (11). 3. The terminal clip according to claim 1 or 2, characterized in that the second cavity (9) has a shape similar to a lock hole. 4. The terminal clamp according to claim 1 or 2, characterized in that the clamping frame (6) is provided with a hole (12) for the passage of the longitudinal plate (10) of the clamping member (8) ). 5. The terminal clamp according to one of claims 1 to 3, characterized in that the clamping part (8) is designed to be fastened to the housing. 6. The terminal clamp according to one of claims 1 to 3 or 5, characterized in that the clamping part (8) is designed as an insulation stripping element.

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