Wiring terminal

Abstract

The invention relates to a connection terminal for connecting electrical conductors, comprising a busbar on which clamping points for clamping the electrical conductors are formed.

Description

Technical Field

[0001] The invention relates to a connecting terminal for connecting an electric conductor. The connecting terminal has a busbar, and a clamping position for clamping the electric conductor is formed on the busbar. Background Art

[0002] Such a connecting terminal is known from DE 10 2016 105 192 B3. Summary of the invention

[0003] The invention is based on the object of further improving such a connecting terminal with regard to the connection safety of an electrical line.

[0004] The object is achieved in the case of a terminal of the type mentioned at the outset in that the busbar has at least one three-dimensionally shaped receiving contour downstream of the clamping point in the conductor insertion direction of the electrical conductor, the receiving contour being configured to support and / or receive the electrical conductor. The invention has the following advantages: the three-dimensionally shaped receiving contour can increase the positional stability of the electrical conductor in the state clamped at the clamping point, and in particular can improve the stable positioning at the clamping point. In this case, the receiving contour can be adapted three-dimensionally to the outer shape of the electrical conductor in an advantageous manner, so that the electrical conductor rests there at a certain circumferential angle and is thus positionally fixed at the position.

[0005] In an advantageous embodiment, the three-dimensionally shaped receiving contour is arranged completely downstream of the clamping point, ie in the conductor insertion direction of the electrical conductor no part of the three-dimensionally shaped receiving contour is located next to or upstream of the clamping point.

[0006] The receiving contour can thus at least partially receive the electrical conductor at least in a specific region. This can reduce the risk of failure at the contact point, in particular when forces from different directions act from the outside on the clamped electrical conductor. The receiving contour then causes a reduced movement of the electrical conductor at the clamping point, thereby causing a reduced risk of failure.

[0007] The terminal block may have a housing, for example an insulating material housing. The busbar is then at least mostly arranged in the housing. The housing may have a wire insertion opening for introducing the electrical wire to be clamped. The wire insertion direction of the electrical wire into the housing is simultaneously specified by the wire introduction opening.

[0008] According to an advantageous design of the present invention, the busbar has at least one clamping edge at the clamping position pointing toward the electrical conductor, and the electrical conductor can be fixedly clamped at the clamping edge. The electrical conductor can be particularly reliably fixed to the clamping position by such a clamping edge and in particular can not perform movement in the longitudinal direction in the clamped state. In addition, the clamping legs of the clamping spring can also have a clamping edge at the free end. The clamping edge can extend transversely to the wire insertion direction, in particular orthogonally to the wire insertion direction.

[0009] According to an advantageous embodiment of the present invention, the clamping edge is part of a first projection which is designed to protrude relative to the surrounding surface of the busbar. This can further improve the positional fixation of the electrical conductor in the clamped position.

[0010] According to an advantageous embodiment of the invention, the busbar has at least one second projection, which is formed protruding from the surrounding surface of the busbar, downstream of the receiving contour in the direction of the conductor insertion. The second projection, which can be formed at its peak, for example, in a rounded manner or in the form of an edge, additionally supports the support of the electrical conductor on the busbar. In particular, in the case of bending stresses of the electrical conductor, the second projection provides a further contact point in order to avoid undefined stress drops.

[0011] According to an advantageous design of the present invention, it is proposed that the receiving contour is implemented as a curved cavity, which has a bottom surface, which forms a bearing surface for the clamped electric wire. Through this cavity, the electric wire can be well embedded in the receiving contour, so that even when a force acts laterally on the wire, for example, a lateral deviation of the electric wire is prevented or at least reduced. The cavity can have a longitudinal axis extending parallel to the wire insertion direction of the electric wire. The cavity can extend in the longitudinal direction, that is, in the direction of its longitudinal axis, at least substantially parallel to the wire insertion direction and thus parallel to the longitudinal direction of the clamped electric wire. The three-dimensionally shaped receiving contour can be three-dimensionally shaped in particular when the bottom surface is formed in a spherical shape multiple times in different bending directions.

[0012] According to an advantageous design of the present invention, the cavity is symmetrical with respect to a longitudinal direction extending parallel to the wire insertion direction, thereby enabling the electrical wire to be particularly reliably fixed in the cavity to prevent lateral displacement.

[0013] According to an advantageous embodiment of the invention, the cavity is arranged in a third projection which is designed to protrude relative to the surrounding surface of the busbar. The third projection together with the cavity enables a retention of the central region of the stripped section of the electrical conductor. The cavity can be present at its deepest point at the level of the surrounding surface of the busbar or slightly above the level of the surrounding surface of the busbar.

[0014] According to an advantageous design of the present invention, the bottom surface of the cavity is curved concavely in the circumferential direction of the clamped electrical conductor. Therefore, the cavity can extend concavely in a cross section perpendicular to the longitudinal direction of the clamped electrical conductor. Even when forces act laterally, lateral deflection of the electrical conductor can be prevented or reduced by such a cavity.

[0015] According to an advantageous design of the present invention, the bottom surface of the cavity is convexly curved or extends in a straight line in the longitudinal direction of the clamped electrical conductor. Therefore, the cavity is convexly curved or straight in a longitudinal section extending in the longitudinal direction of the clamped electrical conductor. If the cavity is straight in the longitudinal direction, the bottom surface can be formed, for example, as part of a tubular side surface, in particular a tubular shape with a constant radius.

[0016] In an advantageous design, the bottom surface of the cavity is convexly curved in the longitudinal direction of the clamped electric conductor. Correspondingly, the bottom surface has a peak, i.e., the highest position, in its extension in the longitudinal direction, which forms an additional supporting edge for the electric conductor in the region of the cavity. Therefore, when viewed in the longitudinal direction, the cavity contains another protrusion inside. Here, from the wire introduction opening of the terminal for introducing the electric conductor into the housing of the terminal, the peak can be arranged in the cavity in front of the center, in the center, or behind the center of the convexly curved contour of the bottom surface. The contour convexly curved in the longitudinal direction, for example, can first rise to the peak with a first slope when viewed from the wire introduction opening, and descend with a second slope after the peak. In an advantageous design, the second slope can be greater than the first slope in terms of magnitude. Here, in the case of a curved shape in the longitudinal direction, the average value of the rising or falling sections is regarded as the slope.

[0017] According to an advantageous design of the invention, the receiving contour is configured by its shape to surround the electrical conductor in a circumferential area, in particular in a circumferential area with a circumferential angle of 30 to 90 degrees, thereby making it possible to secure the electrical conductor particularly reliably against lateral displacement.

[0018] According to an advantageous embodiment of the invention, it is proposed that the clamping edge, the first projection, the receiving contour, the second projection and / or the third projection are formed in one piece from the material of the busbar, in particular by stamping, bending and / or embossing. In this way, such additional elements of the busbar can be provided particularly simply and cost-effectively, in that the additional elements are formed directly from the material of the busbar during the manufacture of the busbar. No additional assembly steps are then required.

[0019] According to an advantageous design of the present invention, the terminal block is configured to clamp the electrical conductor at the clamping location by means of a spring force clamping device. This allows simple and rapid connection of the electrical conductor to the clamping location and reliable and durable contact even in the presence of vibrations.

[0020] According to an advantageous design of the present invention, the connecting terminal has a clamping spring having a clamping leg for clamping the electrical conductor at the clamping position. The clamping spring can additionally have a supporting leg for fixing the clamping spring in the connecting terminal. The clamping spring can have a spring bow between the contact leg and the clamping leg. The clamping leg can have a clamping edge at its free end for fixing and clamping the electrical conductor.

[0021] According to an advantageous embodiment of the invention, it is provided that the clamping leg ends with a free end between the clamping point and the receiving contour. This applies at least in a state where the electrical conductor is not clamped.

[0022] This design allows the clamping of the electrical conductor to be particularly secure and to be fixed both in the longitudinal direction and in the lateral direction. The fixing in the lateral direction is supported by the receiving contour.

[0023] In an advantageous embodiment of the invention, the electrical conductor clamped against the busbar by means of the clamping legs can bear against the projections, namely one, several or all of the first, second and / or third projections.

[0024] In this context, a projection is understood to be any projection that protrudes from a generally flat surface of the contact side in the busbar, regardless of its geometry and cross-sectional area. The projections can be arranged at different distances from one another in the direction of wire insertion, in particular directly one after the other, i.e. no further elements of the busbar that are present for clamping the wires are arranged between them.

[0025] According to an advantageous development of the invention, it is provided that the busbar has a recess, for example a groove, at the location of one, several or all projections on the side facing away from the clamping point. This has the advantage that the projections can be produced on the busbar in a simple manner, for example by punching out corresponding grooves with the aid of a stamping tool. By punching out the grooves, corresponding projections are produced on the opposite side of the busbar, that is, on the contact side.

[0026] For the purposes of the present invention, the indefinite article "a" is not to be understood as a numeral. That is to say, for example, if a "component" is mentioned, this is to be interpreted in the sense of "at least one component". Whenever an angle is specified in degrees, it relates to a circle size of 360 degrees (360°). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be explained in detail below based on embodiments using the accompanying drawings.

[0028] The accompanying drawings show:

[0029] Figure 1 The terminal block is shown in a side sectional view,

[0030] Figure 2 , Figure 3 Shown in Figure 1 : is an enlarged partial view of the region A marked in different viewing directions,

[0031] Figure 4 , Figure 5 Shown without electrical conductors and in Figure 2 , Figure 3 A similar view in

[0032] Figure 6 The busbars are shown in a perspective view,

[0033] Figure 7 The busbar is shown in a perspective view in a longitudinal section. DETAILED DESCRIPTION

[0034] exist Figure 1 The connecting terminal 1 shown in FIG. 1 has a housing 2, a busbar 3, a clamping spring 4 and an actuating element 5. The busbar 3 and the clamping spring 4 are at least largely arranged in the housing 2 and form a contact plug of the connecting terminal 1, by means of which an electrical conductor 9 can be fixedly clamped at a clamping point formed on the busbar 3 by means of a spring force clamping device.

[0035] The clamping spring 4 has a support leg 41, a spring bow 42 connected to the support leg 41, and a clamping leg 43 connected to the spring bow 42, which ends at a free end 44, for example with a clamping edge. The housing 2 has a wire insertion opening 20. The electrical wire 9 can be introduced into the housing 2 in the wire insertion direction L through the wire insertion opening 20 and clamped at the busbar 3. As can be seen, the stripped end section 91 of the electrical wire 9 that has escaped from the insulating sheath 90 is fixedly clamped there. The fixed clamping is performed by the clamping leg 43 of the clamping spring 4. The clamping spring 4 is supported via the support leg 41 of the clamping spring against the clamping force applied by the clamping leg 43.

[0036] The following is based on Figure 1 The enlarged detail of the region A marked in FIG. 1 illustrates busbar 3 in more precise detail.

[0037] Here, Figure 2 In with Figure 1 Region A is shown in the same lateral cross-sectional view. Figure 3 The region A is shown in the front view of the end of the stripped section 91 of the electrical conductor 9. Figure 4 The figure shows that there is no electrical conductor 9. Figure 2 The area shown in Figure 5 The figure shows that there is no electrical conductor 9. Figure 3 The area shown in .

[0038] As from Figures 2 to 5 It can be seen from the figure that the busbar 3, when viewed in the wire insertion direction L, first has a first protrusion 31, a third protrusion 33 behind the first protrusion at a certain distance therefrom, and a second protrusion 32 behind the third protrusion at a certain distance. The first protrusion 31 forms the actual clamping part 34 for the electrical conductor 9. For this purpose, the first protrusion 31 can have a clamping edge at its peak, and the electrical conductor 9 is fixedly clamped at the clamping edge.

[0039] A three-dimensionally shaped receiving contour 6 is present at the third projection 33, which is configured to support the electrical conductor 9 or its stripped section 91. The receiving contour 6 can advantageously be designed as a curved cavity, which extends with its longitudinal direction parallel to the conductor insertion direction L and thus parallel to the longitudinal direction of the electrical conductor 9. Figure 3 It can be seen in FIG. 1 that the receiving contour 6 can surround the electrical line 9 by its shaping at a certain circumferential angle α, in particular at a circumferential angle α in the range of 30 degrees to 90 degrees.

[0040] The second projection 32 serves to additionally support the electrical conductor 9 .

[0041] The receiving contour 6 with the cavity is shown in a section perpendicular to the wire insertion direction L. Figure 5 The recess is designed to be concavely curved in the circumferential direction of the clamped electrical conductor in the cross section. Figure 4 It can be seen that the bottom of the cavity is initially designed to rise in the conductor insertion direction L, reaches a peak 7 and then descends again with a certain slope. Thus, in the cross section, the bottom of the cavity is designed to be convexly curved.

[0042] Figure 6 An advantageous embodiment of a busbar 3 is shown, which has the elements already explained above, namely a first projection 31 , a second projection 32 and a third projection 33 which has a concave receiving contour 6 . Figure 6 In particular, it is to be noted that the concave receiving contour 6 does not necessarily have to be designed with a convex contour in the longitudinal direction, that is, it does not necessarily have to be designed with the peaks 7, but can also be configured as a receiving contour extending linearly in the longitudinal direction.

[0043] Figure 7 An advantageous embodiment of a busbar 3 is shown, which has the previously described elements, wherein the concave receiving contour 6 has a convex shape with a peak 7 in the longitudinal direction, as previously described according to Figure 4 As described.

[0044] Reference numerals list

[0045] 1 Terminal block

[0046] 2 Housing

[0047] 3 Bus

[0048] 4 Clamping spring

[0049] 5 Control elements

[0050] 6. Accommodate the outline

[0051] 7 Peak

[0052] 9 Electrical wires

[0053] 20 Wire entry opening

[0054] 31 First protrusion

[0055] 32 Second protrusion

[0056] 33 Third protrusion

[0057] 34 Clamping area

[0058] 41 Support legs

[0059] 42 Springbow

[0060] 43 Clamp your legs

[0061] 44 Free end of clamping leg

[0062] 90 Insulation sheath

[0063] 91 Stripped insulation end section

[0064] α Circumference angle

[0065] L Wire insertion direction

Claims

1. A terminal (1) for connecting an electrical conductor (9), the terminal having a busbar (3), a clamping portion (34) for clamping the electrical conductor (9) being formed on the busbar, characterized in that: The busbar (3) has at least one three-dimensionally shaped receiving contour (6) downstream of the clamping point (34) in a line insertion direction (L) of the electrical line (9), the receiving contour being configured to support and / or receive the electrical line (9).

2. The connection terminal according to claim 1, characterized in that: The busbar (3) has at the clamping point (34) at least one clamping edge which points toward the electrical conductor (9) and at which the electrical conductor (9) can be fixedly clamped.

3. The connecting terminal according to any one of the preceding claims, characterized in that The clamping edge is part of a first projection (31) which is designed to protrude relative to the surrounding surface of the busbar (3).

4. The connecting terminal according to any one of the preceding claims, characterized in that The busbar (3) has at least one second projection (32) downstream of the receiving contour (6) in the conductor insertion direction (L) and is designed to project from the surrounding surface of the busbar (3).

5. The connecting terminal according to any one of the preceding claims, characterized in that The receiving contour (6) is designed as a curved recess having a bottom surface which forms a support surface for a clamped electrical conductor (9).

6. The connection terminal according to claim 5, characterized in that: The cavity is symmetrical with respect to a longitudinal direction extending parallel to the wire insertion direction (L).

7. The connecting terminal according to any one of claims 5 to 6, characterized in that: The cavity is arranged in a third projection (33) which is designed to protrude relative to the surrounding surface of the busbar (3).

8. The connecting terminal according to any one of claims 5 to 7, characterized in that: The bottom surface of the cavity is curved concavely in the circumferential direction of the clamped electrical conductor (9).

9. The connecting terminal according to any one of claims 5 to 8, characterized in that: The bottom surface of the cavity is convexly curved or runs in a straight line in the longitudinal direction of the clamped electrical conductor (9).

10. The connecting terminal according to any one of the preceding claims, characterized in that The receiving contour (6) is configured by its shape to surround an electrical conductor (9) over a circumferential region, in particular over a circumferential region having a circumferential angle (α) of 30 degrees to 90 degrees.

11. The connecting terminal according to any one of the preceding claims, characterized in that The clamping edge, the first projection (31), the receiving contour (6), the second projection (32) and / or the third projection (33) are integrally formed from the material of the busbar (3), in particular by stamping, bending and / or embossing.

12. The connecting terminal according to any one of the preceding claims, characterized in that The connecting terminal (1) is configured to clamp an electrical conductor (9) at the clamping point (34) by means of a spring force clamping device.

13. The connection terminal according to claim 12, characterized in that: The connecting terminal (1) has a clamping spring (4) having clamping legs (43) for clamping an electrical conductor (9) at the clamping point (34).

14. The connection terminal according to claim 13, characterized in that: The clamping leg (43) ends with a free end (44) between the clamping point (34) and the receiving contour (6).

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