Crimp connection having a longitudinal slot for crimping blades

Abstract

Proposed is an assembly (1) having an elongate metal part (3), wherein a further metal part (2) is provided and the two metal parts (2, 3) are connected by means of a crimp connection, wherein the crimp connection comprises crimping blades (5), between which the elongate metal part (3) is arranged and, after deformation of the crimping blades (5), is permanently fixed to and electrically contacted with the further metal part (2), wherein the elongate metal part (3), in its end region by which it is placed and fastened into a crimp connection region of the further metal part (2), comprises a slot (6), in particular a longitudinal slot (6), into which the ends of the crimping blades (5) protrude after the deformation process.

Description

[0001] Crimp connection with longitudinal slot for crimp wings

[0002] Description

[0003] The invention relates to an arrangement with an elongated metal part, wherein a further metal part is provided and the two metal parts are connected by means of a crimp connection, wherein the crimp connection has crimp wings, between which the elongated metal part is arranged and, after forming the crimp wings, is permanently fixed to the further metal part and electrically contacted, according to the features of the preamble of patent claim 1.

[0004] Crimp connections, for example for arranging and electrically contacting an electrical conductor (e.g., an elongated metal part) with another metal part (e.g., a contact element), are known and have the advantage over liquid connections (e.g., realized by soldering or laser welding or the like, which are process-technically unstable and do not always lead to reproducible results) that they are mechanically very stable and have good electrically reproducible properties, especially in the series production of such connections.

[0005] Although these good properties already exist, the present invention is concerned with improving these properties.

[0006] The invention is therefore based on the object of improving a known arrangement.

[0007] This problem is solved by the features of patent claim 1.

[0008] According to the invention, the elongated metal part has a longitudinal slot (a slot aligned with the longitudinal axis) in its end region, with which it is inserted and secured into a crimp connection area of ​​the further metal part. The ends of the crimping wings dip into this slot after forming and preferably come into contact with the elongated metal part. Due to the improved contact and, if applicable, the contact surface, this connection's stability is increased, as well as its electrical properties improved.

[0009] An embodiment according to the invention is shown in the figures and described below.

[0010] An arrangement 1 in Figure 1 shows another metal part, here designed as a contact element 2. The elongated metal part is an electrical conductor 3, here designed as a flat, rigid electrical conductor (for example, a component of a lead frame). It can alternatively be a round conductor or a stranded conductor that has been plated at its end region, so that it has a square-shaped, preferably rectangular, end region.

[0011] The contact element 2 has a crimping area 4, with a crimping wing 5 protruding from a base (not further designated) and forming, in a manner known per se, a receiving area for the end region of the electrical conductor 3 (generally the elongated metal part). Figure 2 shows that the end region of the electrical conductor 3 has been inserted into the crimping area 4 and, in a manner known per se, the two crimping wings 5 ​​have been formed. The end regions of the two crimping wings 5 ​​extend into a longitudinal slot 6 in the electrical conductor 3. Various geometries of the slot 6 in the electrical conductor 3 are shown in Figures 5 and 6. The cross-section of the slot 6 is preferably trapezoidal in order to enlarge the contact surfaces for the end regions of the two crimping wings 5 ​​entering there.

[0012] For the sake of completeness, the additional metal part designed as contact element 2 is shown in isolation in Figure 4.

[0013] Figure 2 also shows that at the end of the contact element 2, starting from the crimping area 4, two additional wings 7 can, but do not have to, protrude. These are generally required when the elongated metal part, in particular the electrical conductor 3, has a sheathing that is enclosed by the two additional wings 7 after their deformation.

[0014] If these two additional wings 7 are present at all, they can be removed after the wings 5 ​​have been formed, as shown in Figure 3.

[0015] The arrangement according to the invention is shown again in Figure 7 (side view) and Figure 8 (section through the crimping area 4). In particular, it can be seen that the ends of the wings 5, after forming, completely dip into the slot 6 and come to rest on the bottom of the slot 6, formed by the electrical conductor 3. Reference numeral 8 represents a base of the further metal part, in particular the contact element 2, from which the crimping wings 5 ​​extend.

[0016] In a preferred embodiment, the depth of the slot 6 is approximately 1 / 3 to half the height of the elongated metal part 3, in particular of the electrical conductor 3.

[0017] In an exemplary dimensioning, to which the invention is in no way restricted, the width of the elongated metal part 3 is approximately 0.8 mm to 1 mm, the width at the bottom of the slot 6 being 0.05 mm to 0.08 mm, “mm” means millimeters.

[0018] A preferred application of the invention is the connection in the high-voltage range at voltages greater than 100 volts, since a compact crimp connection with large contact surfaces of the two metal parts involved has a positive effect on the energy transfer in the connection area.

[0019] Reference symbol list

[0020] 1. Arrangement

[0021] 2. additional metal part (especially contact element)

[0022] 3. elongated metal part (especially electrical conductor)

[0023] 4. Crimping area

[0024] 5. Crimping wing

[0025] 6. Slot

[0026] 7. additional wings

[0027] 8. Basis

Claims

Patent claims 1. Arrangement (1) with an elongated metal part (3), wherein a further metal part (2) is provided and the two metal parts (2, 3) are connected by means of a crimp connection, wherein the crimp connection has crimp wings (5) between which the elongated metal part (3) is arranged and, after the crimp wings (5) have been formed, is permanently fixed to the further metal part (2) and electrically contacted, characterized in that the elongated metal part (3) has, in its end region, with which it is inserted and fastened in a crimp connection region of the further metal part (2), a slot (6), in particular a longitudinal slot (6), into which the ends of the crimp wings (5) dip after the forming.

2. Arrangement according to claim 1, characterized in that the elongated metal part (3) is an end region of an electrical conductor, in particular a stamped grid, and the further metal part (2) is a contact element.

3. Arrangement according to claim 1 or 2, characterized in that the cross section of the slot (6) is trapezoidal.

4. Arrangement according to one of the preceding claims, characterized in that the depth of the slot (6) is approximately 1 / 3 to half the height of the elongated metal part (3), in particular of the electrical conductor (3).

5. Arrangement according to one of the preceding claims, characterized in that the width of the elongated metal part (3) is approximately 0.8 mm to 1 mm, the width at the base of the slot (6) being 0.05 mm to 0.08 mm.

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