JP2002051433A - Electrical terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal connection, which enables coping with conductors having a wide bandwidth of diameters, being usable for narrow row terminals or other terminals having small construction dimensions as well, since it has an extremely small construction width all the same, and has two terminal edges contraposed to each other for connecting the conductor of a lacquer wire rod or wire rod covered with synthetic material, without the need for insulation removal. SOLUTION: This invention concerns an electrical terminal which has at least one terminal connection and a bus-bar inside a housing, for connecting an electrical conductor insulated with lacquer or a synthetic material, without the need for insulation removal. The bus-bar is formed having a contact post, which is hard and causes a current to flow. The contact post forms one terminal edge of the terminal connection, and is a tool for removing the lacquer of a lacquer wire rod, or for cutting the insulator of the conductor of a wire rod at the same time. The other edge of the terminal connection is given by the free end of a terminal spring then, and this terminal spring is made of high-grade spring steel, for clamping conductors of a wide bandwidth of diameters.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention provides an insulator housing and a busbar within the housing, the busbar having two or more end pieces, at least one of which. The present invention relates to an electrical terminal, the strip comprising terminal connections for connecting lacquer-insulated or synthetic-insulated (= synthetic-coated) electrical conductors.

[0002] The present invention relates to a terminal connection for connecting a lacquer wire or a wire conductor insulated with synthetic material without insulation removal, and to connect such a terminal without the need for insulation removal of an electric conductor. Or other well-known connection techniques, such as screw terminal connections or other spring-loaded terminal connections for connecting electrical conductors whose conductor ends have not been previously insulated. Whether it has another terminal connection remains as it is.

[0003]

2. Description of the Prior Art Terminals such as those mentioned earlier are known as connection or pass-through terminals. These are used in a variety of ways as device or motor connection terminals, but as row terminals on support rails or in the form of terminal blocks made up of individual terminals that can be juxtaposed, or as front connection devices and transformer terminals. , Or other connection terminal devices, and at least on the connection side of the terminals, the lacquer wire material by the lacquer removal terminal connection portion, or the synthetic material-coated conductor by the cut terminal connection portion, to wire without insulation removal. If you do, it is always used.

[0004] The main characteristics of the terminal described above are as follows.
The terminal connection for the connection of the lacquer wire or of the synthetic material-coated wire conductor without the need for insulation removal must be provided for the otherwise normal spring-loaded terminal connection or the screw connection for the conductor end to be insulated. It requires a different connection technology than the case. Basically, a terminal connection for wiring that does not require insulation removal has two terminal edges facing each other, and each conductor to be connected is a terminal (aligned laterally with respect to the terminal edge). The conductors are pressed in between them in the direction of extension of the edges, in which case the terminal edges are formed as tools for lacquer removal (lacquer stripping) or as tools for cutting conductor insulation, so that the respective conductors The lacquer is removed or its synthetic insulator is cut when inserted or pushed between the terminal edges for electrical contact (this is known for lacquer terminal connections or cut terminal connections). See).

In this connection technique, of course, the insulating housing of the terminals must be correspondingly aligned, and a suitably open insertion slit in the housing must be used to push in the wire conductor (for this purpose). Is described in DE 43 12 778 A1). The pushing of the wire conductor can be performed manually by a pushing tool and completely automatically by a wiring automatic device.

However, with this connection technique, mainly winding wires (for example, motor windings or transformer windings) are wired, and these winding wires have a bandwidth of, for example, 0.18 mm to, for example, 1.2 mm diameter. Actually, a problem arises because it exists as a lacquer wire having Such a bandwidth of diameter cannot be handled by hitherto known lacquer removal terminal connections, in particular, between two opposite terminal edges of the same terminal connection, two or different wire diameters of different size. When trying to clamp more lacquer wire, it cannot be processed.

[0007] This is also the case for cutting terminal connections which are known in the prior art, for example, where synthetic insulated connecting wires with a diameter of only 0.6 mm and current carrying wires with very large conductor diameters have to be processed. .

Known terminal connections do not actually handle these bandwidths of normal conductor diameter. These are pressed out of a spring-hard contact material as fork-shaped contacts having two terminal legs, the terminal legs of the fork contacts forming terminal edges facing each other, The rim is formed as a tool for lacquer removal or as a tool for cutting conductor insulation, depending on the application. However, the spring travel and the spring force of the terminal legs of such fork contacts must in principle already be configured relatively precisely in their construction to the respective conductor diameter in order to ensure an intact clamping of the conductor. Must.

In order to increase the bandwidth of the conductor diameter to be clamped, the terminal legs of said fork contacts at the cutting terminal connection are relatively freely movable (ie free from a greater return force) and the basis of the fork contacts. It has been proposed that both terminal legs can be better matched to their respective conductor diameters, since they are formed in a member,
The required cutting clamping force is applied by the terminal spring,
This terminal spring grips both terminal legs from the outside in the form of an outer clamp. However, this is such that such a disconnect terminal connection is configured to be too wide,
It also has the disadvantage that it cannot be used for narrow column terminals or for other terminals assuming a small structural width.

Other proposals cannot be implemented in practice.
This consists in that, in the various subsections, the terminal legs of the fork contacts are provided with terminal edges with various spacings, which means that the wire conductors are fixedly arranged in a predetermined sequence, ie, It has the disadvantage that it has to be inserted into the fork contacts, classified according to the increasing conductor diameter.

[0011]

SUMMARY OF THE INVENTION The object of the invention described below is to deal with a large column of conductor diameters and still have a very small structural width, so that a narrow column terminal or a small Provided is a terminal connection having two terminal edges facing each other for connection without the need for insulation removal of a lacquer wire or a synthetic-coated wire conductor, which can also be used for other terminals having a size. Is to do.

[0012]

This object is achieved as follows by the features of the characterizing part of Claim 1. That is, an end piece is punched out of a bus bar, which is usually made of a material that conducts well in electrical conductivity (for example, electrolytic copper), which has the shape of a rigid contact post itself, and the width of the contact post. However, the width of the contact post is smaller than the width of the bus bar, and the contact post forms one terminal edge of the terminal connection portion. The other terminal edge of the terminal connection is provided by the free end of the terminal spring, which is
It is manufactured from high-grade spring steel (for example, austenitic chromium nickel spring steel), the terminal edges of the contact posts being formed as lacquer removal tools or tools for cutting conductor insulation, and the terminal springs Take over the function of pressing the conductor against the terminal edge of the contact post.

An advantageous embodiment of the invention is characterized in that the terminal spring is formed as a U-shaped leaf spring, in which a contact post carrying a current is arranged in parallel with the back of the leaf spring. Are extended (see claim 3), and the terminal edge of the terminal spring is formed in the form of a wide flat pressing slide (see claim 4). .

An important advantage of the present invention is obtained by utilizing a contact post that is itself rigid for such terminal connections. A contact post that is itself rigid can be configured to be relatively narrow in cross section. This is a tool for carrying current and for simultaneously lacquering and cutting conductor insulation. This has the advantage of considerable structural size. A contact post that is rigid by itself has no resilience and therefore does not require structural movement space. Since this can be arranged on the edge side of the bus bar, the remaining width of the bus bar is sufficient to arrange the wire conductor to be clamped here and the pressing terminal edge of the terminal spring respectively. At the same time, the formation of the terminal spring is largely independent of the formation of the contact post, so that the terminal spring can be formed such that its outer contour is approximately within the width of the busbar.

In this basic configuration of the terminal connection according to the invention, the lacquer wire or the synthetic-coated wire conductor is only contacted on one side of the conductor. This is not a disadvantage for the desired low current transfer resistance. This is because the current transfer takes place directly to the contact post carrying the current and the electrical conductivity of this contact post is optimized by the best possible material selection (eg electrolytic copper).

In the terminal connection according to the invention, the current flow is decoupled from the generation of the clamping force. This also allows the best possible material selection for the terminal spring. In connection with the independent construction of the terminal springs described above, it is thus ensured that the spring force characteristic of the terminal spring can be configured for a large bandwidth of the diameter of the wire conductor to be clamped, and The clamping force of the pressing terminal edge of the terminal spring is guaranteed to automatically match the respective diameter of the conductor to be clamped.

Despite the large clamping force, especially when the pressing terminal edge is formed in the form of a wide flat pressing slide, the conductor insulator is not damaged on the pressing terminal edge side of the terminal spring. . This means that the terminal spring is not subjected to current stress (for example because it is supported and guided in the insulator housing of the terminal) on the side remote from the contact post carrying the current (this is the terminal spring). This has the advantage that the air and creepage distances can be easily maintained with respect to the adjacent terminal at the pressing terminal edge side, and even with terminals having a very narrow structural width.

The new terminal connections can be present in a variety of ways in the contact posts that carry the current, for example they can be arranged one above the other in a multi-story arrangement (as a two-conductor terminal connection, this is claimed in the claims). Or by the same connection technique (and if this is desired), multi-conductor terminal connections can be produced, the contact posts carrying the current being, for example, both U-shaped leaf springs. Are set centrally between the terminal legs, so that one terminal position is obtained on each side of the contact post for conductors having different conductor diameters.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

A busbar 2 is shown, which has conductor terminal connections 3 and 4 at its respective ends, and which busbar is, as is usual and well known, insulated with a housing inside the housing. (Not shown). Such a bus bar also has a plug receiving part 5 for receiving plug contacts of a generally horizontal bridge,
This lateral bridge allows the busbars to be electrically bridged by terminals arranged adjacent to each other.

The conductor terminal connection 3 is also of a known construction type and is described in DE 1964120.
No. 6 describes it exactly. This terminal connection portion is used to connect a conductor end portion that has been insulated and removed in advance. The terminal connection consists of an end piece 6 of the bus bar 2 and a terminal spring 7, which is formed in the form of a loop and has contact legs 8 and terminal legs 9 which contact the bus bar. The terminal leg has a window notch, through which the head end of the bus bar end piece extends, and the terminal edge outside the window notch is connected to the lower side of the bus bar end piece and the window cut. An electric conductor (not shown) passing between the notched terminal edge is pressed against one lower end of the bus bar end and fixedly clamped.

For the present invention, both terminal connections shown at the right end of the bus bar in FIG. 1 are important. Both terminal connections are constructed identically, but are adapted to clamp electrical conductors having a very large bandwidth of conductor diameter. FIG. 1 shows two electrical conductors 10 and 11 clamped for demonstration purposes, the diameters of which are distinctly different from each other.

Each of the two terminal connections consists of an end piece of the bus bar and its own leaf springs 12 and 13. According to the invention, the end piece of the busbar is formed in the form of a rigid contact post 14, which is narrower than the width of the busbar 2.

Each of the conductors 10 and 10 is pressed from above and in sequence into its illustrated terminal position (by the point of a screwdriver or by a flat slide or by a special pressing tool adapted to the existing structural space). For 11, the contact post 14 provides a protruding terminal edge 15, which depending on the application (lacquer wire to be clamped or synthetic-coated conductor to be clamped), as a lacquer removal tool, or It is formed as a tool for cutting the conductor insulator. These tool characteristics of the terminal edges are well known in the prior art for delacquer terminal connections and cutting terminal connections and are therefore not shown in more detail.

The terminal edge of the terminal connection portion facing the contact post is formed by the free leg end of a U-shaped leaf spring 12 or 13, respectively. The non-free end of the leaf spring is fixed in the embodiment shown to the back of the contact post, for example by a protruding hook piece to the back of the contact post, which hook piece is used to cut the leaf spring legs. It is engaged in the notch. The leaf spring is self-retaining at the contact post since it is mounted under initial stress.

The free leg ends of the leaf springs forming the terminal edges opposite the contact posts have been shown as having the shape of a wide flat pressing slide 16 and 17, and each having a sharp entry ramp. There is no problem in pushing the electric conductor into the terminal position.

The position shown in FIG. 1 of the arrangement of the contact posts offset at the same time at the end of the bus bar and close to the right edge (according to the drawing) of the bus bar is shown in FIG. 1 for all configurations of the invention. Is not the optimal arrangement. The contact posts may be located elsewhere along the busbar, and depending on the application, multiple posts along the busbar may be used to connect the lacquer wire or synthetic coated wire conductor without the need for insulation removal. May be created.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bus bar having a conductor terminal connection portion on an end side.

[Explanation of symbols]

 2 Bus bar 4 Terminal connection part 10 Conductor 11 Conductor 12 Terminal spring 13 Terminal spring 14 Contact post 15 Terminal edge 16 Press sliding part 17 Press sliding part

 ──────────────────────────────────────────────────の Continuation of the front page (72) Inventor Konrad Schutlomedel Sondershausen Sondershausel Schutlase 15 Germany F F-term (reference) 5E012 AA23 AA37 5G355 AA03 BA01 BA11 5G361 BA03 BB01 BC01 5G375 AA02 CA02 CA13 CC07 DA36 EA17

Claims (4)

[Claims] 1. An insulator housing and a bus bar inside the housing are provided;-the bus bar is made of a material that is electrically conductive well;
And at least one end piece having at least one terminal connection for connecting a lacquered or synthetically insulated electrical conductor, the terminal connection having two terminal edges facing each other ,
An electrical terminal between which the electrical conductor is pressed in the direction of extension of the terminal edge, wherein the conductor is lacquered for electrical contact or the synthetic insulator is cut off. Wherein the end piece of the bus bar has the shape of a rigid contact post (14), which carries an electric current, the width of the contact post being
The width of the contact post is smaller than the width of the bus bar (2).
Forming one terminal edge (15) of the terminal connection, and-the other terminal edge (16, 17) of the terminal connection being provided by the free ends of the terminal springs (12, 13); The terminal spring is made of high-grade spring steel, the terminal edge of the contact post being formed as a lacquer removal tool or as a tool for cutting the conductor insulation; and An electrical terminal, characterized in that the terminal edge assumes the function of pressing the conductor against the terminal edge of the contact post. 2. At least two conductor terminal connections, each with its own terminal spring (12, 13), are arranged along the axial length of the current-carrying contact posts and adjacent to each other. The terminal according to claim 1, wherein: 3. The terminal spring is formed as a U-shaped leaf spring, into which a contact post for passing a current extending parallel to the back of the leaf spring extends. The terminal according to claim 1, wherein the terminal is characterized in that: 4. The terminal as claimed in claim 1, wherein the terminal edge of the terminal spring is formed in the form of a wide, flat pressing slide (16, 17).