DE102017110060A1 - A method of making an assembly and arrangement comprising a bus bar for a terminal for contacting a plurality of electrical conductors and electrical terminal - Google Patents

Abstract

The invention relates to a method for producing an arrangement with a conductor rail for a terminal for contacting a plurality of electrical conductors, the method comprising the following steps: providing a metal sheet metal part for a busbar; Producing apertures (4) formed in the sheet metal part in the region of a base portion of the bus bar in a rectilinear series arrangement and each adapted to receive a conductor end insertable for electrical contacting; and forming a contact element (7) associated with the opening (4) and contacting the plug-in conductor end on a lower side of the base section of the busbar for one or more of the openings (4), wherein the contact element (7) is one on the underside of the base section has protruding and adjacent to an edge of the opening (4) arranged web (8). Forming the contact element (7) comprises: bending a peripheral portion (12) disposed in the sheet metal part adjacent the base portion of the bus bar and adjacent to the aperture (4) about a first bending axis (13) towards the bottom of the base portion; and bending an end portion of the edge portion (12) about a second bending axis (15) transverse to the first bending axis (13). Furthermore, an arrangement for a terminal for contacting a plurality of electrical conductors with a bus bar, which is formed as a punch-bending member, and a connection terminal is provided.

Description

The invention relates to a method for producing an arrangement with a busbar for a terminal for contacting a plurality of electrical conductors, an arrangement for a terminal and a terminal for contacting a plurality of electrical conductors.

background

Such terminals are used to contact electrical conductors, in which case conductor ends of the electrical conductors are inserted into contact points of the terminal to form an electrical contact to a busbar of the connection point. Such terminals regularly have an insulating housing and arranged in the insulating busbar, are formed at the plurality of contact points.

In the document EP 1 391 965 B1 a bus bar is formed with a base portion in which a plurality of openings are arranged in a straight line arrangement, wherein the openings are arranged to receive a plug-in conductor end for making electrical contact. Inserted conductor ends are clamped by means of a breakthrough respectively associated leaf spring. The apertures have a draft produced by deep drawing, with which on a lower side of the base portion a contact element is formed, which is formed as circumferentially closed web. With the aid of the circumferentially continuous design of the contact element, the electrical conductivity necessary for the operation of the terminal is provided in the region of the opening.

In the document DE 10 2010 009 158 A1 is a Federklemmanschluss disclosed in which the busbar associated with the apertures provided as a collar contact element is provided which is bent out of the opening in the bus bar down.

Summary

The object of the invention is to provide a method for producing an arrangement with a busbar for a terminal for contacting a plurality of electrical conductors and a terminal, which support the variable and material-saving production of the busbar.

To achieve the object, a method for producing an arrangement with a busbar for a terminal for contacting a plurality of electrical conductors according to the independent claim 1 is provided. Related claims 13 and 14 relate to an arrangement for a terminal for contacting a plurality of electrical conductors and a terminal. Alternative embodiments are the subject of dependent subclaims.

In one aspect, there is provided a method of making an assembly having a bus bar for a terminal for contacting a plurality of electrical conductors. The method comprises the following steps: providing a metal sheet metal part for a bus bar; Producing apertures which are formed in the sheet metal part in the region of a base portion of the bus bar in a rectilinear series arrangement and are each adapted to receive a conductor end insertable for electrical contacting; and forming a contact element associated with the aperture and contacting the plug-in conductor end at the busbar on one underside of the base section of the busbar for one or more of the apertures, the contact element comprising a web projecting or projecting on the underside of the base section adjacent to an edge of the aperture having. The forming of the contact element comprises: bending an edge portion, which is arranged in the sheet metal part adjacent to the base portion of the bus bar and adjacent to the aperture, a first bending axis to the bottom of the base portion, and bending over an end portion of the edge portion about a second bending axis transverse to the first bending axis.

In another aspect, an arrangement for a terminal for contacting a plurality of electrical conductors is provided. The arrangement has a busbar, which is designed as a stamped and bent component. The bus bar includes: a base portion; a plurality of apertures arranged in a rectilinear array in the base portion and each adapted to receive a conductor end insertable for electrical contacting; and a contact element which is formed for one or more of the apertures, the breakthrough is formed. For contacting the insertable conductor end, the contact element is arranged on an underside of the base portion and has a protruding or projecting on the underside of the base portion and adjacent to an edge of the opening arranged web. The web is formed as a bent about a second bending axis bending portion on a bent to the underside of the base portion about a first bending axis edge portion which is adjacent to the base portion and adjacent to the opening, wherein the second bending axis to the first bending axis is transverse.

According to another aspect, there is provided a terminal for contacting a plurality of electrical conductors, comprising an insulating housing and an assembly of the aforementioned type, which is arranged in the insulating housing and with which a plurality of contact or connection points for respectively contacting an electrical conductor are formed.

The edge section arranged adjacent to the opening can, at least before the bending of the end section, grasp the opening over its entire length in the longitudinal direction of the base section. The edge portion then extends over the entire length of the aperture adjacent thereto. Even after the bending over of the end section for forming the web of the contact element arranged on the underside of the base section, the bent-over edge section can detect the opening substantially over its entire length in the longitudinal direction.

By means of the method, the busbar for the arrangement can be produced as a stamped and bent component.

Edge portions from which the web for the contact element on the underside of the base portion is made by bending, may be arranged on one or both opposite sides of the base portion. In one embodiment, the one or more edge portions are arranged on only one side of the base portion, whereas the opposite side of the base portion is free of protruding edge portions.

The apertures of the straight-line arrangement, in which optional apertures can also be arranged offset to one another transversely to the longitudinal direction of the base section, may be symmetrical with respect to a longitudinally middle section of the base section. Such a medium-symmetrical arrangement may alternatively or additionally be provided for the edge sections bent over towards the underside and the webs of the contact elements produced therefrom.

The sheet metal part may consist of copper or another metal, wherein a tin coating may be provided.

A proximal end of the contact element on the underside relative to the base section of the busbar can be arranged at a distance from the edge of the aperture and to the underside, so that a gap is formed between the edge of the aperture and the proximal end of the contact element, for example the proximal end of the web is.

For electrically contacting the insertable into the breakthrough conductor end a plurality of conductor contacts may be formed having a conductor contact on the web of the contact element on the underside of the base portion of the bus bar and a conductor edge contact at the edge of the opening. The conductor contacts serve to form an electrical contact with the plug-in conductor end, if this is inserted into the associated opening on the busbar and inserted therethrough. In the production exactly two conductor contacts can be formed. Due to the round shape of the plug-in conductor end can be formed in the electrical contacting substantially point-contacting between the conductor end and the busbar. In the case of producing only two conductor contacts, a two-point contact is formed in the electrical contacting. In the various embodiments, the conductor contact may be made at the land of the contact element at a distal end of the land relative to the base portion. Alternatively, only a single conductor contact can be made, for example on the contact element, in particular at the distal end of the web.

With regard to a longitudinal side of the base portion of the busbar, the conductor contact on the web, on which the insertable conductor end for electrical contact comes to rest, be formed offset in the horizontal direction to the conductor edge contact at the edge of the opening. The conductor contact on the web can be arranged in the direction of the long side of the base section in the region of the opening or outside of the opening. In combination with the conductor edge contact at the edge of the opening, these embodiments lead to an inclined position of the inserted conductor end, when it comes to the conductor contact of the web and the conductor edge contact at the edge of the opening to the plant. Alternatively, the conductor contact on the web of the contact element in the direction of the longitudinal side of the base portion may be arranged on a vertical line (flush arrangement), resulting in a vertical orientation (non-skew) of the plugged into the opening conductor end. Also in this embodiment, an isolated conductor contact may be formed at the distal end of the web, for example, characterized in that the web is obliquely placed on the underside of the base portion or has a curved shape.

The edge portion and / or the end portion can be angled at right angles in each case during bending substantially. The first and the second bending axis in this case assume a substantially right angle to one another.

The web can be made upright with respect to the underside of the base portion of the bus bar. The web can be arranged on the underside of the base portion substantially at right angles to the plane of the base portion. In this or other embodiments, the web of the contact element may be formed with a web width transverse to the longitudinal direction of the base portion, which is substantially equal to the width of the associated aperture. Alternatively, the web width may be greater or smaller than the width of the opening transverse to the longitudinal direction of the base portion.

The web can be made to extend substantially parallel to the edge of the aperture. Alternatively, the web can be arranged obliquely to the edge of the opening, in particular with respect to the edge on a narrow side of the opening.

The openings can be made in the sheet metal part by means of stamping, with a punching tool used for this purpose stamping the sheet metal part from the top. The punching of the sheet metal part from above to form the openings can be used for producing a burr-free conductor edge contact in the top-side region of the opening. In an exemplary embodiment, the conductor edge contact can thereby be designed to receive a pre-tinned coating in the region of the conductor edge contact.

Contact elements for two apertures can be made in the linear array by bending over opposite end portions of a folded edge portion. The two apertures, for which the contact elements are produced by bending over the opposite end portions of the bent-over edge portion, in particular a respective web, can be arranged adjacent to each other in the linear row arrangement of apertures. Alternatively, the contact elements are produced by bending over end sections of separately formed edge sections.

At the base portion of the busbar, the breakthroughs each assigned, a leaf spring can be arranged, which is adapted to clamp the insertable into the opening conductor end, such that a clamping portion of the leaf spring comes to the insertable conductor end to the plant. By means of the leaf spring, the inserted conductor is pressed against the conductor or contacts. The leaf springs for separate apertures may be mounted separately on the base portion. The arrangement and orientation of the leaf springs may be symmetrical with respect to a central portion of the base portion. The leaf springs may for example consist of spring steel or resilient copper.

In the straight line arrangement, separate mounting apertures can be made at the base portion of the bus bar from the apertures, in which mounting portions of the leaf springs are arranged when mounting the leaf springs. Per breakthrough can be provided exactly a mounting breakthrough. Alternatively, the leaf springs may be mounted by mutually adjacent apertures in a single common mounting aperture. The assembly of the leaf springs on the busbar can be done by means of a detachable mounting connection.

The openings can be produced on the upper side along the edge of the opening at least in sections with bevel embossing. Alternatively, the bevel embossing can be provided continuously on the opening.

In the region of a transition, one or more bending aids can be produced between the base section and the edge section to be bent over. The bending aid may have a Materialausnehmung or weakening up to the breakthrough. For example, the bending aid extends along the base portion in the region of the transition between the base portion and the edge portion to be bent, from which then the contact element is produced by bending. The bending aids may be formed in one or more sections, which do not overlap in the longitudinal direction of the base portion with the one or more openings. The areas adjacent to the openings may be free of bending aids. The bending aids can be arranged laterally of the mounting holes or. The forming of the bending aids can support the material-saving production of the busbar in an exemplary embodiment, so that the material used for the busbar is reduced in the terminal.

The embodiments described above may be provided in accordance with the arrangement for the terminal as well as in connection with the terminal for contacting a plurality of electrical conductors.

list of figures

• 1 eine perspektivische Darstellung eines Blechformteils zum Herstellen von Stromschienen für eine Anschlussklemme zum Kontaktieren von mehreren elektrischen Leitern, wobei zusätzlich eine Stromschiene gezeigt ist;
• 2 das Blechformteil und die Stromschiene aus 1 von oben und von vorn;
• 3 eine perspektivische Darstellung einer Anordnung mit einer Stromschiene, an der jeweiligen Durchbrüchen zugeordnet Blattfedern angeordnet sind;
• 4 eine perspektivische Darstellung der Anordnung aus 3, wobei in eine Anschluss- oder Kontaktstelle ein elektrischer Leiter eingesteckt ist;
• 5 eine schematische Darstellung der Anordnung aus 3 von vorn und hinten;
• 6 schematische Darstellungen einer Anordnung vergleichbar 4, wobei ein eingestecktes Leiterende in vertikaler Richtung ausgerichtet sowie schräg gestellt ist;
• 7 perspektivische Darstellungen einer Stromschiene;
• 8 schematische Darstellungen der Stromschiene aus 7 von oben, von unten und von der Seite;
• 9 eine schematische Darstellung einer Ausführungsform, bei der ein eingestecktes Leiterende schräg gestellt ist; und
• 10 eine schematische Darstellung einer Anschlussklemme mit einer Anordnung mit Stromschiene, wobei in eine Anschlussstelle ein Leiterende eingesteckt ist, sowie eine Detaildarstellung eines Abschnitts A der Anschlussstelle.

In the following, further embodiments will be explained with reference to figures of a drawing. Hereby show:

• 1 a perspective view of a sheet metal part for producing bus bars for a terminal for contacting a plurality of electrical conductors, wherein additionally a bus bar is shown;
• 2 the sheet metal part and the busbar 1 from above and from the front;
• 3 a perspective view of an arrangement with a busbar, are arranged on the respective openings associated with leaf springs;
• 4 a perspective view of the arrangement 3 , wherein an electrical conductor is inserted in a connection or contact point;
• 5 a schematic representation of the arrangement 3 from the front and back;
• 6 schematic representations of an arrangement comparable 4 wherein an inserted conductor end is aligned in the vertical direction and inclined;
• 7 perspective views of a busbar;
• 8th schematic representations of the busbar 7 from above, from below and from the side;
• 9 a schematic representation of an embodiment in which an inserted conductor end is inclined; and
• 10 a schematic representation of a terminal with an arrangement with busbar, wherein in a connection point, a conductor end is inserted, as well as a detailed representation of a section A of the connection point.

The 1 and 2 show a sheet metal part 1 for producing a busbar 2 by punching and bending. 1 shows by the sheet metal part 1 schematically the case of making the busbar 2 Steps provided as punching-bending component in the illustrated embodiment. The sheet metal part 1 For example, it consists of a copper material, which may be precoated with tin. Further illustrations of the busbar shows the 7 ,

For making the power rail 2 be in a base section 3 for the busbar 2 breakthroughs 4 by punching from a top 5 of the sheet metal part 1 produced. In addition to the breakthroughs 4 are by means of punching assembly breakthroughs 6 made, so that each of the breakthroughs 4 one of the mounting apertures is assigned. The monthly breakthroughs 6 serve to receive a leaf spring (see. 3 to 6 below).

The breakthroughs 4 is at the power rail 2 one contact element each 7 with a jetty 8th assigned, wherein the contact element 7 with the jetty 8th on a bottom 9 of the base section 3 adjacent to the edge 10 the breakthrough 4 is arranged. Between the edge 10 the breakthrough 4 and the jetty 8th is a gap 11 on the bottom 9 educated.

The contact element 7 with the jetty 8th is manufactured by edge sections 12 that are adjacent to the base section 3 and adjacent to the breakthroughs 4 extend to a first bending axis 13 (see. 8th ) are bent downwards. The angling takes place in the illustrated embodiment at right angles. From the bent end sections 12 then become end sections 14 around a second bending axis 15 (see. 7 ), in the illustrated embodiment, also substantially at right angles to the contact element 7 with the jetty 8th manufacture.

By means of the intended bending process, the relative position of the web 8th in terms of the breakthrough 4 be selected depending on the application. So can the jetty 8th with a view from the top of the busbar 2 within the breakthrough 4 or outside the area of the breakthrough 4 be arranged. Also an arrangement of the bridge 8th , so that it is flush with the edge 10 the breakthrough 4 is arranged, can be provided.

In the area of a transition between the base section 3 and the edge portion to be bent 12 are bending aids 16 arranged.

The 3 to 6 show an arrangement with the busbar 2 , where leaf springs 20 the breakthroughs 4 each assigned to the busbar 2 are mounted. Here is a mounting or mounting section 21 the leaf springs 20 arranged in the associated mounting hole, whereas a clamping portion 22 the leaf springs 20 in the assigned breakthrough 4 engages, so that an inserted conductor end 23 can be clamped (see. 6 ).

The 7 and 8th show further schematic of an embodiment of the busbar 2 ,

The 9 shows an embodiment in which the inserted conductor end 23 is skewed to difference in execution 6 where the inserted conductor end is vertically aligned. The different positions are the result of a different relative position of a conductor contact 24 and a conductor edge contact 25 (see also 10 below) when inserting and clamping the conductor end 23 come here to the plant.

Further in detail, this is also recognizable in the 10 , which is on a terminal 30 relates, in which the arrangement with the busbar 2 and the leaf springs 20 in an insulating housing 31 is included, so that multiple connectors 32 are provided. Out 10 it turns out that on the edge 10 the breakthrough 4 a chamfering 33 can be provided.

The features disclosed in the above description, the claims and the drawings may be important both individually and in any combination for the realization of the various embodiments.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1391965 B1 [0003]
• DE 102010009158 A1 [0004]

Claims (14)

A method of making an assembly comprising a bus bar (2) for a terminal for contacting a plurality of electrical conductors, the method comprising the steps of: - Providing a metal sheet metal part for a busbar (2); - Producing openings (4) in the sheet metal part (1) in the region of a base portion (3) of the busbar (2) are formed in a straight line arrangement and are each adapted to receive a plug for electrical contacting conductor end (23); and - Forming a breakthrough (4) and at the busbar (2) the plug-in conductor end (23) contacting contact element (7) on a bottom (9) of the base portion (3) of the busbar (2) for one or more of the openings ( 4), wherein the contact element (7) has a web (8) which projects on the underside (9) of the base section (3) and is adjacent to an edge (10) of the opening (4) and wherein the forming of the contact element (7) Has: - Bending an edge portion (12) in the sheet metal part (1) to the base portion (3) of the busbar (2) adjacent and adjacent to the opening (4) is arranged around a first bending axis (13) to the bottom (9) of the base portion (3) and - bending an end portion (14) of the edge portion (12) about a second bending axis (15) transversely to the first bending axis (13). Method according to Claim 1 , characterized in that for electrical contacting of the breakthrough (4) insertable conductor end (23) a plurality of conductor contacts are formed having a conductor contact (24) on the web (8) of the contact element (7) on the underside (9) of the base portion ( 3) of the busbar (2) and a conductor edge contact (25) on the edge (10) of the opening (4). Method according to Claim 1 or 2 , characterized in that with a view to a longitudinal side of the base portion (3) of the busbar (2) of the conductor contact (24) on the web, at which the plug-in conductor end (23) for electrical contact comes to rest, in the horizontal direction to the conductor edge contact (25 ) is formed offset on the edge (10) of the opening (4). Method according to at least one of the preceding claims, characterized in that the edge portion (12) and / or the end portion (14) are bent at right angles in each case during bending substantially. Method according to at least one of the preceding claims, characterized in that the web (8) is made upright in relation to the underside (9) of the base section (3) of the busbar (2). Method according to at least one of the preceding claims, characterized in that the web (8) is produced extending substantially parallel to the edge (10) of the opening (4). Method according to at least one of the preceding claims, characterized in that the apertures (4) in the sheet metal part (1) are produced by means of stamping, wherein a punching tool used for this purpose stamps the sheet metal part from the upper side (5). Method according to at least one of the preceding claims, characterized in that contact elements (7) for two openings in the rectilinear row arrangement are produced by bending over opposite end portions (14) of a bent-over edge portion (12). Method according to at least one of the preceding claims, characterized in that at the base portion (3) of the busbar (2) the apertures (4) each associated with a leaf spring (20) is arranged, which is inserted into the opening (4) To clamp conductor end (23), such that a clamping portion (21) of the leaf spring (20) at the insertable conductor end (23) comes into contact. Method according to Claim 9 , characterized in that in the rectilinear row arrangement on the base portion (3) of the busbar (2) of the apertures (4) separate mounting apertures (6) are produced, in which when mounting the leaf springs (20) mounting portions (22) of the leaf springs (20 ) to be ordered. Method according to Claim 10 , characterized in that the openings (4) on the upper side along the edge (10) of the opening (4) are at least partially produced with a chamfering (33). Method according to at least one of the preceding claims, characterized in that bending aids (16) are produced in the region of a transition between the base portion (3) and the edge portion (12) to be bent over. Arrangement for a terminal for contacting a plurality of electrical conductors, comprising a bus bar (23) which is formed as a stamped and bent component and comprises: - a base portion (3); - a plurality of apertures (4) disposed in a rectilinear array in the base portion (3) and each adapted to receive a conductor end (23) insertable for electrical contacting; and - a contact element (8), which for one or more of the apertures (4), the breakthrough assigned, - for contacting the insertable conductor end (23) on a bottom (9) of the base portion (3) is arranged and - a on the The web (8) as a bent about a second bending axis (15) bent portion at one to the bottom Bottom (9) of the base portion (3) is formed around a first bending axis (13) bent edge portion (12) adjacent to the base portion (3) and adjacent to the aperture (4), wherein the second bending axis (15) transverse to the first bending axis (13). Connecting terminal (30) for contacting a plurality of electrical conductors, with an insulating housing (31) and a received in the insulating housing (31) arrangement according to Claim 13 , with which a plurality of contact points (32) for respectively contacting an electrical conductor (23) are formed.

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