CN115084927A

CN115084927A - Housing for an electrical connection terminal or electrical plug-in device

Info

Publication number: CN115084927A
Application number: CN202210208200.0A
Authority: CN
Inventors: 托马斯·维特
Original assignee: Wago Verwaltungs GmbH
Current assignee: Wago Verwaltungs GmbH
Priority date: 2021-03-10
Filing date: 2022-03-03
Publication date: 2022-09-20
Also published as: DE102022105527A1

Abstract

The invention relates to a housing for an electrical connection terminal or an electrical plug-in device, having a cable guard for the tensile force relief of an electrical cable connected thereto, having a first clamping element for clamping the electrical cable in an operating position of the cable guard, having a manual actuation surface for manually actuating the cable guard into the operating position, having at least one second clamping element for clamping the electrical cable in the operating position, which is coupled to the first clamping element via a first actuating mechanism, a movement of the first clamping element in a first direction of movement, which is triggered by manual actuation of the first clamping element on the manual actuation surface, being able to automatically trigger a movement of the second clamping element in a second direction of movement, which is offset from the first direction of movement, by the first actuating mechanism.

Description

Housing for an electrical connection terminal or electrical plug-in device

Technical Field

The invention relates to a housing for an electrical connection terminal or an electrical plug-in device, wherein the housing has a protective device for relieving tension of an electrical line connected thereto, wherein the protective device has a first clamping element for clamping the electrical line in an operating position of the protective device, wherein the first clamping element has a manual actuation surface for manual actuation of the protective device into the operating position. The electrical line introduced into the housing can be fixed with respect to its orientation by means of such a line protection. When an external force acts on the electrical conductor, the external force is kept away from the electrical contact of the connecting terminal or the electrical plug-in device through the wire protection device.

Background

Such a housing with a cable guard is known, for example, from DE 202013101929U 1.

Disclosure of Invention

The invention is based on the object of proposing a further improved housing of this type.

This object is achieved by a housing of the type mentioned at the outset in that: the protective device has at least one second clamping element for clamping the electrical conductor in the operating position, which is coupled to the first clamping element, for example, via a first operating mechanism, wherein a movement of the first clamping element in a first direction of movement, which is triggered by manual actuation of the first clamping element on the manual operating surface, can automatically trigger a movement of the second clamping element in a second direction of movement, which deviates from the first direction of movement, by the first operating mechanism. Such a wire protection device is based essentially on the following principle: the passage cross section for threading the electrical conductor is reduced by displacing at least the first clamping element in the first direction of movement in order to fix the conductor by means of the first clamping element. In the present invention, the passage cross section can be reduced from at least two directions by means of an additional second clamping element which can be automatically moved in a further, second direction of movement. Thereby, the electrical conductor can be clamped more effectively by the clamping element. Furthermore, the cable guard can be used more generally for very different conductor cross sections. Another advantage of the present invention is that the electrical conductor can be automatically centered between the clamping elements during clamping to enable symmetrical clamping.

According to an advantageous embodiment of the invention, it is provided that the cable guard can be adjusted into the operating position only by manually actuating the first clamping element on the manual actuation surface. This has the following advantages: no additional elements are required to transfer the cable guard into the operating position, such as special tools or tensioning screws. In a further advantageous embodiment, the cable guard can autonomously maintain the operating position occupied by the operating surface only operated manually, for example by means of a lock (verrastering).

The cable guard can be designed, for example, such that the electrical cable is clamped only between the first and second clamping elements. In this case, the second direction of movement can for example be extended diametrically opposite to the first direction of movement, so that an operation of the cable protection device via the manual operating surface causes a movement of the first and second clamping elements towards one another. The cable guard can also bring about the fixing of the electrical cable by means of the first and second clamping elements and the immovable wall of the housing. There can also be a movable third clamping element which will be explained in detail below.

The housing has a housing base body, relative to which the first and second clamping elements can be moved during the clamping process, i.e. during manual actuation of the first clamping element on the manual actuation surface.

In order to be able to move the first clamping element via the first actuating mechanism in the manner explained, the first clamping element transmits an actuating force to the second clamping element via the first actuating mechanism. In an advantageous embodiment of the invention, it is provided that the first clamping element or at least a part of the first clamping element, which applies the actuating force to the first actuating element, is supported relative to the actuating force on a part of the housing base body, for example on a side wall of the housing base body. In this case, the first clamping element or the part which transmits the actuating force can bear directly against the mentioned part of the housing base body. In this way, the cable guard and in particular the first actuating mechanism can be realized particularly simply and compactly, since no self-supporting structure is required. The part of the first clamping element that transmits the actuating force can be, for example, a first locking leg that will be explained further below.

According to an advantageous embodiment of the invention, it is provided that the second direction of movement deviates at least 30 ° from the first direction of movement. The movement of the first clamping element is thus significantly deflected into the movement of the second clamping element by the first actuating mechanism. This allows a particularly effective reduction of the passage cross section of the cable guard. The second direction of movement can, for example, deviate approximately 90 ° from the first direction of movement. The first actuating mechanism thus deflects the movement of the first clamping element into a differently oriented movement of the second clamping element.

According to an advantageous embodiment of the invention, it is provided that the cable guard has at least one third clamping element for clamping the electrical cable in the operating position, which third clamping element is coupled to the first clamping device, for example, via a second operating mechanism, wherein a movement of the first clamping element, which is triggered by a manual actuation of the first clamping element on the manual operating surface, in the first movement direction automatically triggers a movement of the third clamping element in a third movement direction, which deviates from the first movement direction, by means of the second operating mechanism. This enables a substantially symmetrical clamping of the electrical line. The third clamping element can be movable relative to the base body of the housing like the first and second clamping elements. The cable protection device can thus be adapted particularly universally to different conductor cross sections. Furthermore, a kinematically particularly advantageous three-point clamping of the electrical line can be achieved.

In order to be able to move the third clamping element via the second actuating mechanism by means of the first clamping element in the manner explained, the first clamping element transmits an actuating force to the third clamping element via the second actuating mechanism. In an advantageous embodiment of the invention, it is provided that the first clamping element or at least the part of the first clamping element which exerts the actuating force on the second actuating element is supported against a part of the housing base body, for example against a side wall of the housing base body, with respect to the actuating force. In this case, the first clamping element or the part which transmits the actuating force can bear directly against the mentioned part of the housing base body. In this way, the cable guard and in particular the second actuating mechanism can be realized particularly simply and compactly, since no self-supporting structure is required. The part of the first clamping element that transmits the actuating force can be, for example, a second locking leg, which will be explained below.

According to an advantageous embodiment of the invention, it is provided that the second and third clamping elements can be automatically moved in the movement directions directed toward one another as a result of a movement of the first clamping element in the first movement direction, which is triggered by manual actuation of the first clamping element on the manual actuation surface. This allows a particularly effective reduction of the passage cross section of the cable guard when only one manual operating face is operated.

According to an advantageous embodiment of the invention, the clamping forces acting on the electrical conductor from the first clamping element, the second clamping element and the third clamping element are directed towards one another in such a way that the clamping forces at least largely cancel one another out. In this way, a force balance between the three clamping elements can advantageously be established at least approximately. This enables the load acting on the base body of the housing to be kept low.

The first actuating mechanism can be designed differently, for example as a lever mechanism, an eccentric mechanism, etc. The same applies to the second operating mechanism, which can be designed according to the same principle as the first operating mechanism or can be designed according to another principle.

According to an advantageous embodiment of the invention, it is provided that the first operating means and/or the second operating means have a ramp-like and/or wedge-like feed profile arranged at an angle to the first direction of movement. In this way, an actuating mechanism which can be realized with little effort and which moreover requires little installation space can be provided. The automatic movement of the second clamping element via the first operating mechanism and/or the automatic movement of the third clamping element via the second operating mechanism can be carried out by the ramp or wedge principle, which can be realized relatively simply. The first clamping element can thus have, for example, a ramp-like or wedge-like feed profile at its contact region with the second clamping element. The first clamping element can have a ramp-like or wedge-like feed profile at its contact region with the third clamping element.

According to an advantageous embodiment of the invention, it is provided that the first clamping element is designed as a locking clip having a first locking leg and a second locking leg, which is coupled to the first locking leg via a bridge-like connecting section. This allows a simple manufacturable and robust design of the first clamping element. The bridge-like connecting section can at the same time form a clamping body for clamping the electrical line.

According to an advantageous embodiment of the invention, it is provided that the second clamping element is coupled to the first locking leg via a first actuating means and the third clamping element is coupled to the second locking leg via a second actuating means. The first locking leg can thus have the mentioned ramp-like or wedge-like feed profile on the side oriented toward the second clamping element, for example. The second locking leg can have the mentioned ramp-like or wedge-like feed contour on the side oriented toward the third clamping element. The second clamping element can likewise have a ramp-like or wedge-like profile on the side oriented toward the first locking leg. The third clamping element can likewise have a ramp-like or wedge-like profile on the side oriented toward the second locking leg.

According to an advantageous embodiment of the invention, the first clamping element, in particular the first locking leg and/or the second locking leg, has a first toothing on at least one side remote from the electrical line, said first toothing engaging with a second toothing fixed to the housing. The first clamping element is fixed to the housing base body by means of such a first tooth. In particular, an undesired resetting of the first clamping element against the first direction of movement is avoided by the combination of the first toothing and the second toothing.

According to an advantageous embodiment of the invention, the second clamping element has a third toothing on the side remote from the first clamping element, which third toothing engages with a fourth toothing fixed to the housing, and/or the third clamping element has a fifth toothing on the side remote from the first clamping element, which fifth toothing engages with a sixth toothing fixed to the housing. An undesired resetting of the second clamping element against the second direction of movement is prevented by the combination of the third toothing and the fourth toothing. An undesired resetting of the third clamping element against the third direction of movement is prevented by the combination of the fifth toothing with the sixth toothing.

The tooth portions fixed to the housing can be provided on the housing body, respectively. The housing body can be designed in one piece or in multiple pieces, wherein in the case of a multi-piece design the individual parts are connected to one another in a fixed, mutually immovable arrangement.

According to an advantageous embodiment of the invention, the second clamping element has a seventh toothing on the side facing the first clamping element, which is engaged with an eighth toothing provided on the first clamping element, and/or the third clamping element has a ninth toothing on the side facing the first clamping element, which is engaged with a tenth toothing provided on the first clamping element. A defined locking between the second clamping element and the first clamping element is achieved by the combination of the seventh toothing and the eighth toothing. A defined locking of the third clamping element to the first clamping element is achieved by the combination of the ninth toothing and the tenth toothing.

According to an advantageous embodiment of the invention, it is provided that the second clamping element and/or the third clamping element are designed in a wedge-shaped manner. In this way, the respective clamping element can be optimally adapted in terms of its design to the simple design of the first or second actuating element and to the largely circular design of the electrical line.

According to an advantageous embodiment of the invention, it is provided that the first clamping element, in particular the bridge-shaped connecting element, extends transversely to the longitudinal extension direction of the electrical line and/or transversely to the first movement direction. In this way, the bridge-like connecting element can bridge the corresponding passage area of the protective device for the electrical line.

According to an advantageous embodiment of the invention, it is provided that the housing is a housing of an electrical connection terminal or an electrical plug connector, or that the housing is a cable housing which has a fastening element by means of which the cable housing can be fastened to the housing of the electrical connection terminal or the electrical plug connector. Accordingly, the housing can therefore be the electrical connector or the housing of the electrical connection terminal itself. If the housing is a wire-protection housing, this is present in addition to the electrical connection terminal or the housing of the electrical connector and can be plugged onto the electrical connector or the housing of the electrical connection terminal, for example.

The first and/or second and/or third clamping element is advantageously accommodated in an opening or recess in the housing, which opening or recess forms a guide of the one or more clamping elements perpendicular to the conductor insertion direction. The one or more clamping elements are thus fixed or fastened in a direction extending axially along the conductor lead-in direction.

The indefinite article "a" or "an" is not to be understood as a word of number in connection with the invention. That is, for example, if a component is mentioned, this should be interpreted in terms of "at least one component". In terms of angular specification in degrees, the angular specification relates to a circle size of 360 degrees (360 °).

Drawings

The invention is explained in detail below on the basis of embodiments with the aid of the drawings. The figures show:

figure 1 shows the electrical connection terminal in a different view,

figure 2 shows a cross-sectional view of a grommet device with an attached electrical conductor,

fig. 3 shows the cable guard according to fig. 2 with a further connected electrical conductor.

Detailed Description

Fig. 1 shows an electrical connection terminal in the form of a plug connector 2, which is plugged together with a mating plug connector 3. The part of the plug connector 2 not plugged together with the mating plug connector 3 is at least largely enclosed by the housing 1. The housing 1 is a cable protection housing which has a cable protection device 10 in the manner according to the invention. The wire protection device 10 can be operated via the manual operation panel 113. Fig. 1 shows a side sectional view of the plugged-together plug device in the top illustration, and shows the individual plug connectors 2 with the housing 1 and the electrical lines 4 connected thereto on the lower left. The integral electrical plug-in device with the connected electrical lines 4 is shown again on the lower right.

Fig. 2 shows a cross section of the region of the housing 1 in which the wire protection device 10 is arranged. In the example shown in fig. 2, an electrical conductor 4 with a relatively large cross section is connected.

The housing 1 has a housing base body 9 which accommodates the cable guard 10 and its parts which are movable relative to the housing base body 9.

At least in the sectional plane shown, the housing base body 9 has a first side wall 14, a second side wall 16 opposite the first side wall 14, and a bottom wall 15 extending below the cable guard 10 between the first side wall 14 and the second side wall 16. The first side wall 14, the second side wall 16 and the bottom wall 15 form a receiving chamber for the wire guard 10 and the electrical leads 4 arranged therein.

In the embodiment shown, the cable guard 10 has three elements, namely a first clamping element 11, a second clamping element 12 and a third clamping element 13, which are movable relative to one another and relative to the

side walls

14, 16 and the bottom wall 15.

The first clamping element 11 is designed as a locking clip with a first locking leg 111 and a second locking leg 112. Furthermore, the first clamping element 11 has a bridge-like connecting section 110, which connecting section 110 connects the first locking leg 111 to the second locking leg 112. The first clamping element 11 has a manual actuation surface 113 on the outwardly oriented surface side, i.e. the surface side remote from the bottom wall 15, for manual actuation of the thread protection device 10 into the operating position. The manual control surface 113 can be provided, for example, on one or more regions of the bridge-like connecting section 110. The hand control surface 113 can extend over the entire outer surface of the bridge-like connecting section 110, for example. The manual control surface 113 can also extend into the region of the first clamping element 11, in which the connecting section 110 merges into the first locking leg 111 and/or the second locking leg 112. In this region, the manual control surface 113 can have, for example, basin-shaped

recesses

7, 8. This has the following advantages: tools, such as screwdrivers, can also be attached to the hand-held control surface 113 without the risk of slipping.

As can be seen, the first locking leg 111 extends essentially wedge-shaped toward the second clamping element 12. The second locking leg 112 likewise extends essentially wedge-shaped toward the third clamping element 13. The surface of the second clamping element 12 facing the first locking leg 111 is likewise of ramp-like design so as to form a counterpart of a ramp-like contour facing the second clamping element 12 relative to the first locking leg 111. The surface of the third clamping element 13 facing the second locking leg 112 is likewise of ramp-like design so as to form a counter-part with respect to the ramp-like contour of the second locking leg 112 facing the third clamping element 13. The second clamping element 12 and the third clamping element 13 have, for example, rounded contours on their respective sides facing the electrical line 4, which enable good force transmission of the clamping force to the generally round electrical line 4 on the outside.

In order to ensure the fixing of a specific operating position or clamping position of the wire protection device 10, a large number of teeth are present. Thus, there is a second tooth 92 on the first side wall 14, which engages with a first tooth 91 provided on the first locking leg 111. On the second side wall 16, there is a second toothing 99, with which the first toothing 100 provided on the second locking leg 112 engages. On the bottom wall 15, a fourth toothing 95 is present, with which a third toothing 94 provided on the second clamping element 12 engages. Furthermore, a sixth toothing 96 is present on the bottom wall 15, which engages with a fifth toothing 97 provided on the third clamping element 13.

Furthermore, the eighth tooth system 90 provided on the first locking leg 111 engages with the seventh tooth system 93 provided on the second clamping element 12. Furthermore, the tenth toothing 101 provided on the second locking leg 112 engages with the ninth toothing 98 provided on the third clamping element 13.

The ramp-like contact-making contours of the first locking leg 111 and the second clamping element 12 optionally form, together with the toothing provided there, a first actuating mechanism 5 for automatically actuating the second clamping element 12 when the force loading of the first clamping element 11 is carried out. The ramp-like contour of the second locking leg 112 and of the third clamping element 13 associated with one another optionally forms, together with the toothing present there, a second actuating mechanism 6 for automatically actuating the third clamping element 13 when the force loading of the first clamping element 11 takes place.

The entire mechanism functions as follows. First it should be assumed that: the cable guard 10 is in an initial position in which the first clamping element 11 is still as far away from the bottom wall 15 as possible, i.e. the passage for the electrical cable 4 is still of the largest possible size. The electrical line 4 is then guided through this passage and connected to the plug connector 2. The cable guard 10 can then be brought into an operating position, in which the electrical cable 4 is clamped, by manually applying a force to the manual operating surface 113. This can be achieved, for example, by a central force application to the manual control surface 113 or to the bridge-shaped connecting section 110, if only moderate forces are applied. The first clamping element 11 is moved in this case in a first movement direction B1, i.e. downward in the illustration in fig. 2. In this case, the first actuating mechanism 5 automatically moves the second clamping element 12 in the second direction of movement B2, i.e. to the left, and the third clamping element 13 in the third direction of movement B3, i.e. to the right. The second movement direction B2 and the third movement direction B3 are here oriented substantially towards one another. The electrical line 4 is thus enclosed and clamped from three sides, whereby an advantageous three-point clamping can be achieved.

During this clamping process, the first clamping element 11 or its first locking leg 111 rests on the side wall 14 against the forces transmitted to the second clamping element 12. The second clamping element 12 is supported on the bottom wall 15. Furthermore, the first clamping element 11 or its second locking leg 112 is supported on the side wall 16 with respect to the forces transmitted to the third clamping element 13. The third clamping element 13 is supported on the bottom wall 15.

At the end of the actuation of the first clamping element 11 in the first direction of movement B1, an increased clamping action can be achieved by: the manual force application no longer takes place centrally on the manual control surface 113, but rather on the recess 7 of the second locking leg 112 and, in addition, on the recess 8 of the first locking leg 111. Thereby, a higher clamping force can be generated.

Fig. 3 shows the function of the cable guard 10 for clamping an electrical cable 4 having a smaller cross section. It can be seen that the first clamping element 11 is moved significantly further in the first direction of movement B1 than in the view of fig. 2. The second clamping element 12 and the third clamping element 13 are also moved further, that is, more towards the centre of the device. The electrical line 4 is also fixed by an advantageous three-point clamping.

List of reference numerals

1 casing

2 plug-in connector

3 mating connector

4 electric lead

5 first operating mechanism

6 second operating mechanism

7. 8 concave part

9 casing

10 wire protection device

11 first clamping element

12 second clamping element

13 third clamping element

14 first side wall

15 bottom wall

16 second side wall

90 eighth tooth part

91 first tooth

92 second tooth part

93 seventh tooth system

94 third tooth

95 fourth tooth

96 sixth tooth

97 fifth tooth

99 second tooth part

100 first tooth

101 tenth tooth part

110 bridge-shaped connecting section

111 first locking leg

112 second locking leg

113 manual operation surface

B1 first moving direction

B2 second moving direction

Claims

1. Housing (1) for an electrical connection terminal or electrical plug-in device, wherein the housing has a cable guard (10) for the tensile force relief of an electrical cable connected thereto, wherein the cable guard (10) has a first clamping element (11) for clamping the electrical cable in an operating position of the cable guard (10), wherein the first clamping element (11) has a manual operating surface (113) for manually operating the cable guard (10) into the operating position, characterized in that the cable guard (10) has at least one second clamping element (12) for clamping the electrical cable in the operating position, which second clamping element is coupled to the first clamping element (11) via a first operating mechanism (5), wherein the first clamping element (11) is triggered by the manual operation of the first clamping element (11) on the manual operating surface (113) along a first movement The movement in the direction (B1) can automatically trigger a movement of the second clamping element (12) in a second movement direction (B2) which deviates from the first movement direction (B1) by means of the first operating mechanism (5).

2. Housing (1) for an electrical connection terminal or electrical plug-in device, wherein the housing has a cable guard (10) for the tensile force relief of an electrical cable connected thereto, wherein the cable guard (10) has a first clamping element (11) for clamping the electrical cable in an operating position of the cable guard (10), wherein the first clamping element (11) has a manual operating surface (113) for manually operating the cable guard (10) into the operating position, characterized in that the cable guard (10) has at least one second clamping element (12) for clamping the electrical cable in the operating position, which second clamping element is coupled to the first clamping element (11), wherein a movement of the first clamping element (11) in a first movement direction (B1), triggered by the manual operation of the first clamping element (11) on the manual operating surface (113), can be automatically carried out -imparting a movement of the second clamping element (12) along a second movement direction (B2) which is offset from the first movement direction (B1).

3. Housing according to one of the preceding claims, characterized in that the first clamping element (11) or at least the part of the first clamping element (11) which exerts an operating force on the second clamping element (12) via the first operating mechanism (5) is supported relative to the operating force on a part of a housing base body (9) of the housing (1).

4. The housing according to any one of the preceding claims, wherein the second direction of movement (B2) deviates from the first direction of movement (B1) by at least 30 °.

5. The housing according to one of the preceding claims, characterized in that the cable guard (10) has at least one third clamping element (13) for clamping an electrical cable in the operating position, which third clamping element is coupled to the first clamping element (11) via a second operating mechanism (6), wherein a movement of the first clamping element (11) in a first movement direction (B1), which is triggered by manual operation of the first clamping element (11) on the manual operating face (113), can automatically trigger a movement of the third clamping element (13) in a third movement direction (B3), which deviates from the first movement direction (B1), by means of the second operating mechanism (6).

6. The housing according to claim 5, characterized in that the second and third clamping elements (12, 13) are automatically movable in a movement direction (B2, B3) directed toward one another as a result of a movement of the first clamping element (11) in a first movement direction (B1) triggered by manual operation of the first clamping element (11) on the manual operating face (113).

7. Housing according to claim 5 or 6, characterized in that the clamping forces acting on the electrical conductor from the first clamping element (11), the second clamping element (12) and the third clamping element (13) are directed towards one another such that they at least largely cancel one another out.

8. The housing according to one of the preceding claims, characterized in that the first operating means (5) and/or the second operating means (6) have a ramp-like and/or wedge-shaped feed profile arranged at an angle to the first direction of movement (B1).

9. Housing according to one of the preceding claims, characterized in that the first clamping element (11) is designed as a locking clip having a first locking leg (111) and a second locking leg (112) which is coupled to the first locking leg (111) via a bridge-like connecting section (110).

10. The housing according to claim 9, characterized in that the second clamping element (12) is coupled with the first locking leg (111) via the first operating mechanism (5) and the third clamping element (13) is coupled with the second locking leg (112) via the second operating mechanism (6).

11. Housing according to one of the preceding claims, characterized in that the first clamping element (11), in particular the first locking leg (111) and/or the second locking leg (112), has a first toothing (91, 100) on at least one side remote from the electrical conductor, which engages with a second toothing (92, 99) fixed to the housing.

12. Housing according to one of the preceding claims, characterized in that the second clamping element (12) has a third toothing (94) on a side remote from the first clamping element (11), which engages with a fourth toothing (95) fixed to the housing, and/or in that the third clamping element (13) has a fifth toothing (97) on a side remote from the first clamping element (11), which engages with a sixth toothing (96) fixed to the housing.

13. Housing according to one of the preceding claims, characterized in that the second clamping element (12) has a seventh toothing (93) on the side facing the first clamping element (11), which is engaged with an eighth toothing (90) provided on the first clamping element (11), and/or in that the third clamping element (13) has a ninth toothing (98) on the side facing the first clamping element (11), which is engaged with a tenth toothing (101) provided on the first clamping element (11).

14. Housing according to one of the preceding claims, characterized in that the second clamping element (12) and/or the third clamping element (13) are designed in a wedge-shaped manner.

15. Housing according to one of the preceding claims, characterized in that the first clamping element (11), in particular a bridge-like connecting element (110), extends transversely to the longitudinal extension of the electrical line and/or transversely to the first direction of movement (B1).

16. Housing according to one of the preceding claims, characterized in that the housing (1) is a housing of an electrical connection terminal or of an electrical plug connector (2), or the housing (1) is a cable housing having a fixing element by means of which the cable housing can be fastened to a housing of an electrical connection terminal or of an electrical plug connector (2).