EP3050166B1 - Lead-through terminal - Google Patents

Description

The present invention relates to a feedthrough terminal which is suitable and intended to be received on a wall of an electrical construction device. In this case, an actuating device is provided, which clamps a conductor to a conductor receptacle in a contact position and which releases or receives a conductor on the conductor receptacle in an open position.

Such feedthrough terminals have become known in the art. DE 10 2008 039868 A1 discloses a feed-through terminal according to the preamble of claim 1. It is the object of the present invention to provide an improved feed-through terminal.

This object is achieved by a lead-through terminal with the features of claim 1. Preferred developments of the invention are the subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general description and the description of the embodiment.

A lead-through terminal according to the invention comprises a terminal housing, with which the lead-through terminal can be received on a wall of an electrical construction device. On the terminal housing a wall bushing and a pivotable actuator are provided. The actuating device is pivotable between a contact position and an open position. The actuating device is designed and configured to clamp a conductor to a conductor receptacle in the contact position and, in the open position, to release and / or receive a conductor at the conductor receptacle. This is one in the pivoting the actuator between the open position and the contact position existing or possibly resulting gap closed at least in the contact position or at least closed again. Such a gap may optionally occur between the actuator and the wall duct.

The lead-through terminal according to the invention is advantageous because it allows a particularly safe and reliable configuration in the contact position. If the actuating device is arranged such that a gap between a part of the actuating device and the terminal housing on the wall bushing results in the transfer of the actuating device from the open position to the contact position, it is reliably closed at least in the contact position, so that in the contact position inside the terminal housing provided area protected from contact, etc. is.

The electrical construction device may be, for example, a device or else a control cabinet or the like. Preferably, a conductor is connected to a current bar of the conductor receptacle. The current bar can be a separate part, which is inserted or mounted, for example, by the device manufacturer in the feed-through terminal. The current bar can also be part of the feed-through terminal.

Preferably, the gap is spaced from the Leiteraufnehme and in particular independent of the conductor receiving. The gap arises in particular during the pivoting movement of the actuating device, when, for example, during the pivoting movement of the actuating device a part or moving a component of the actuator through the wall duct so as to better utilize the space available within the electrical apparatus. Then, an angle-dependent gap between the actuator and the terminal housing may result, in any case, at least in the contact position is ensured that such a gap is closed.

In particular, with the exception of the conductor receiving at least in the contact position, the wall feedthrough substantially completely or completely closed.

In preferred developments, at least one closure web is provided on the actuating device, which in the contact position leads to a complete closure of the gap on the wall leadthrough. Such a locking web extending outward, for example, from the actuating device can reliably close any remaining gaps, at least in the contact position.

In preferred developments, the actuating device comprises at least one cover cap. The cap may be formed as a protective cap and / or for example at least partially or completely made of an insulating material.

Preferably, the closure web is provided on the cap. Thus, the closure web is captively received on the cap and is anyway automatically used in the contact position for sealing the wall bushing.

In preferred embodiments, the gap is closed in the open position by a deflector. Such a deflector may also be part of an actuator and in particular the cap. Preferably, the cap consists at least partially and in particular completely or almost completely of at least one plastic. Thus, an effective contact protection for the inner parts of the actuator is then effected and the air and creepage distances are increased.

Particularly preferably, an insert device is provided on the actuating device, wherein the insert device can be connected to the cover cap and / or latched. In simple cases, the cap is attached to the insert means via in particular at least one latching nose or fixed and preferably latched. Particularly preferably, at least one latching lug projects outwards on opposite sides of the inserting device. Each latch preferably dips into an opening of the cap and locked there.

It is also possible and preferred that at least one other locking element or a plurality of other locking elements are used to secure the cover captive to the actuating device. It is also possible that by the fixation of the cap and the insertion device is taken captive on the actuator. Assembly time can also be saved by means of such an embodiment since the individual components need not be fastened separately and independently of each other, but optionally locked together, so that both the covering cap and the inserting direction are fixed to the actuating device. If necessary, the Locking or the connection of the cap and the insert device are repealed if it should be necessary. According to the invention, the actuating device comprises a clamping lever and a clamping spring. In this case, the clamping lever is used for applying the clamping force, which is provided at least in part by the clamping spring available.

Preferably, the lead-through terminal comprises a holder, to which a current bar is received. At least one clamping spring is provided for applying a clamping force for clamping the conductor to the current bar. Furthermore, the clamping spring on a first leg and at least one second leg and is pivotally coupled to the first leg of the clamping lever and with the second leg to an auxiliary lever. As a result, the clamping lever and the auxiliary lever are arranged pivotably on the holder.

Such a design allows high clamping forces that can be reliably applied and ensured over long periods of time.
Advantageously, a first pivot axis and a second pivot axis are arranged on the clamping lever, which is provided spaced from the first pivot axis. The clamping spring preferably has a first axle receptacle and at least one second axle receptacle spaced therefrom. Furthermore, an auxiliary lever is provided which has a first rotary unit and at least one second rotary unit spaced therefrom. This means that the clamping lever, the Clamping spring and preferably the auxiliary lever each have two separate joint points remote from each other.

Preferably, a frictional connection of the holder via the clamping lever, the clamping spring and the auxiliary lever. Therefore, on the one hand even relatively high clamping force and, on the other hand, even an even larger opening angle can be achieved with relatively few and structurally simple components.

The holder can also be referred to as a clamping body and serves to receive the current bar and the pivotal attachment of the clamping lever.

The electrical feedthrough terminal provides a tilting lever clamp with dynamic leverage.

In all embodiments, it is preferred that an opening angle between the current bar and the clamping lever or a clamping edge of the clamping lever on the conductor receiving in the open state is greater than 45 ° and in particular greater than 60 ° and preferably greater than 75 °. Opening angles of 90 ° and more are possible. This allows pivoting from above into the ladder receptacle so that even conductors with a large cross-section of z. B. 5 mm ² or 10 mm ² or 20 mm ² or more, which are particularly rigid, can be connected in a simple manner. It is a simple swinging the stripped conductor from above possible. Large and solid ladder must not be bent during assembly and inserted axially from the front into the screw before the head can be clamped, but can be swung in from above.

Preferably, the clamping lever is pivotally mounted on the holder via the first pivot axis. In particular, the first axle receiving the clamping spring is provided on the first leg of the clamping spring and it is provided the second axle receiving the clamping spring on the second leg of the clamping spring. Preferably, the arranged on the first leg first axle receiving the clamping spring is coupled to the second pivot axis of the clamping lever.

Advantageously, the first rotary unit of the auxiliary lever has an axis which is pivotally connected to the second axle receptacle on the second leg of the clamping spring. In particular, the second rotary unit of the auxiliary lever is pivotally mounted on the holder.

Preferably, the second rotary unit of the auxiliary lever has a rounded outer contour, which is pivotally received on an adapted rounded recess of the holder. Particularly preferably, the outer contour and the recess each have a circular shape or the shape of a circle segment. In particular, the second rotary unit of the auxiliary lever is pivotally or rotatably received on the rounded outer contour of the holder and preferably supported.

It is possible and preferable that the second rotation unit of the auxiliary lever includes an opening into which a guide shaft is inserted. In this case, the second rotary unit can be rotatably mounted on the guide axis at the opening. But it is also possible that the guide axis in the opening is not used for the transmission of forces, but essentially only for guidance. The guide axis may for example be part of the housing and, for example, a plastic pin exist, which is pivoted or clipped into the opening. However, it is also possible for the guide axis to be an axle on the holder or else to be introduced separately into the holder in order to pivotally receive and / or support the auxiliary lever on the second rotary unit.

In all embodiments, it is preferred that the clamping spring is part of an actuating device. In a simple embodiment, the actuator consists only of the clamping spring. The clamping spring preferably has a double function: the clamping spring serves to apply the clamping force and at the same time as an actuating lever.

At least one tool opening is preferably provided on the actuating device in order to introduce a tool and to actuate the electrical feed-through terminal in order, for example, to clamp an electrical conductor or to release the clamping.

The actuating device preferably has a tool holder. The tool holder can be provided on an insert device or on an insert part. It is possible and preferred that the clamping spring, for example, has a substantially C-shaped cross section, and that the inner region of the cross section is at least partially and in particular almost completely filled by the inserting device. At the insert means the tool holder can be provided which serves as an abutment when operating to transmit the actuating forces.

The insert device may for example consist of plastic. It is also possible that the tool holder and / or an abutment is provided by bent on the clamping spring tabs or the like.

Preferably, an inner diameter of the tool opening is larger than an inner diameter of the tool holder. This results in many possibilities, since for example different geometries and applications of the electrical feedthrough terminal different angles of the tool holder can be provided on the insert device. Depending on the accessibility and geometric conditions, the orientation of the tool holder on the insert device may have different angles to the surface of the tool opening on the clamping spring. Thus, a different configuration of the entire feedthrough terminal can be made possible by different insertion devices. As a result, an extended application possibility can be achieved for different lead-through terminals only by replacing a single simple component, without substantially increasing the need for stock of parts.

The tool holder preferably extends transversely to the current bar. The angle between the tool holder and the current bar can vary in the open state and depends on the intended use.

The actuating device preferably acts on the clamping lever via the auxiliary lever.

In particularly preferred embodiments, the clamping spring acts at least in the clamping state as a tension spring. In particular, the clamping spring is at least substantially relaxed in the open state. Particularly preferably, the clamping spring is completely relaxed in the open state. Under the term "im Essentially relaxed "is understood in the context of the present invention, in particular an effective force which is less than 10% of the maximum intended clamping force.

In all embodiments, it is preferred that the clamping lever is in the clamping state behind a dead center. As a result, a force is first required to transfer the clamping lever from the clamping state back to the open position. This leads to a self-assurance or self-locking of the clamping state and increases security. This is preferably realized by the fact that the clamping spring acting as a tension spring can contract slightly again before the clamping state has been reached, so that the tension decreases somewhat.

In all embodiments, it is preferred that the end of the first leg and / or the end of the second leg of the clamping spring is respectively bent to form each of the first and / or the second axle receptacle. This allows easy production of the clamping spring and a reliable function.

In particularly preferred embodiments of the invention, at least the holder and the clamping lever and the auxiliary lever are designed as stamped bent parts. This allows a particularly simple and cost-effective production and assembly.

Preferably, at least one groove for securing a conductor received on the current bar and clamped there is provided on the current bar. Particularly preferably, the groove is provided on the current bar transversely to the insertion opening and is located at least approximately where the clamping lever clamps the conductor against the current bar.

Preferably, at least one push-through protection is provided, which prevents a passage of a recorded conductor through the feed-through terminal. For example, such a push-through protection consist of a recorded in a groove of the current bar part, which is inserted from the outside through corresponding holes in the holder and thus secured to the holder is added.

The electrical lead-through terminal allows the application of a high clamping force with a simultaneously possible large opening angle, which can reach and exceed 60 or 75 °. Even with ladders with large cross-sections of 20 mm ² , 25 mm ² or 30 mm ² or 35 mm ² , a zero clamping is made possible after a first time terminals and the removal of such a conductor, in which then by the clamping lever also a thin conductor with diameters of 1 mm, 0.5 mm or less can still be clamped reliably.

When transferring the electrical lead-through terminal from the open state to the clamping state, the clamping lever is initially largely closed, or almost completely free of power, before the pivoting of the tool a high clamping force is applied.

Further advantages and features of the present invention will become apparent from the embodiment, which will be explained below with reference to the accompanying figures.

Fig. 1

eine perspektivische Ansicht einer Durchführungsklemme in der Kontakt- und der Offenposition;

Fig. 2

eine schematische Draufsicht auf eine Wandung einer elektrischen Baueinrichtung mit einem daran aufgenommenen Klemmengehäuse;

Fig. 3

eine perspektivische Ansicht eines Klemmengehäuses;

Fig. 4

eine schematische perspektivische Ansicht auf eine Wandung einer elektrischen Baueinrichtung mit einem daran aufgenommenen Klemmengehäuse und ein vergrößertes Detail;

Fig. 5

eine andere Rasteinheit für das Klemmengehäuse nach Fig. 4;

Fig. 6

eine schematische perspektivische Ansicht einer geöffneten Durchführungsklemme ohne Außengehäuse;

Fig. 7

die Einsatzeinrichtung und die Klemmfeder der Durchführungsklemme nach Fig. 1 und 6;

Fig. 8

eine perspektivische Darstellung der Betätigungseinrichtung der Durchführungsklemme nach Fig. 1 und 6;

Fig. 9

eine geschnittene schematische Seitenansicht der Durchführungsklemme ohne Außengehäuse;

Fig. 10

eine Draufsicht auf die Durchführungsklemme nach Fig. 12;

Fig. 11

eine stark schematische Seitenansicht der Durchführungsklemme im Öffnungszustand;

Fig. 12

eine stark schematische Seitenansicht der Durchführungsklemme in einer Zwischenstellung; und

Fig. 13

eine stark schematische Seitenansicht der Durchführungsklemme im Klemmzustand.

In the figures show:

Fig. 1

a perspective view of a feed-through terminal in the contact and the open position;

Fig. 2

a schematic plan view of a wall of an electrical device with a recorded thereon terminal housing;

Fig. 3

a perspective view of a terminal housing;

Fig. 4

a schematic perspective view of a wall of an electrical device with a recorded thereon terminal housing and an enlarged detail;

Fig. 5

another latching unit for the terminal housing after Fig. 4 ;

Fig. 6

a schematic perspective view of an opened feed-through terminal without an outer housing;

Fig. 7

the insertion device and the clamping spring of the feed-through terminal after Fig. 1 and 6 ;

Fig. 8

a perspective view of the actuator of the feedthrough terminal after Fig. 1 and 6 ;

Fig. 9

a sectional schematic side view of the lead-through terminal without outer housing;

Fig. 10

a plan view of the feedthrough terminal after Fig. 12 ;

Fig. 11

a strong schematic side view of the lead-through terminal in the open state;

Fig. 12

a highly schematic side view of the lead-through terminal in an intermediate position; and

Fig. 13

a strong schematic side view of the feed-through terminal in the clamping state.

With reference to the accompanying figures, the construction and function of a feed-through terminal 100 and an electrical device 500 equipped with at least one such feed-through terminal will be explained below.

It shows FIG. 1 side by side two perspective views of a feedthrough terminal 100, namely left in the clamping state or in the contact position 145 and right next to it in the open state or in the open position 144th

The lead-through terminal 100 has a terminal housing 150 and is intended to abut with the abutment section 172 on a wall 502 of an electrical construction device 500 (cf. Fig. 2 ). The conductor receptacle 115 is largely closed in the contact position 145, while in the open position 144 results in a particularly large opening angle between the current bar and the clamping lever, which can reach 75 ° or more. As a result, a pivoting in of a conductor (cf. Fig. 11 ) into the conductor receptacle 115, which, in particular with conductors of several square millimeters in cross-section, can considerably facilitate the connection.

The terminal housing 150 is in particular made of an electrically non-conductive material and preferably a plastic. The contact section 172 may be provided as a circumferential web, with which the feed-through terminal 100 is supported on the wall 502 circumferentially. It is also possible that the abutment portion 172 consists of several segments or individual support elements.

The tool opening 109, which is provided on the actuating device 103, is visible on the lead-through terminal 100 both in the contact position 145 and in the open position 144. The actuator 103 comprises a cover housing in the form of a cap 153. The cap 153 here consists of an insulating material and protects the interior of the actuator 103 and also the interior of the feed-through terminal 100 from mechanical contact. The air and creepage distances are considerably increased by the cap 153.

The terminal housing 150 may include an outer housing 170 and an inner housing 160 to which the bracket 108 is received. The holder 108 is preferably made of metal and in particular of a bending-punching part. The outer and the inner housing are preferably made of a plastic. On the inner housing 160, the holder 108 is received during assembly and it will be mounted the required metal and clamping parts. The inner housing forms with the holder 108 is a preassembled unit that only has to be plugged into the outer housing 170 or in an already existing on an electrical device 500 and there for. B. integrally formed with the wall outer housing must be inserted or locked.

The feedthrough terminal 100 has the pivotable actuator 103. By pivoting the actuator 103, the lead-through terminal can be opened or closed again. When pivoting the actuating device 103, a gap 148 between the peripheral wall of the abutment portion 172 and the cap 153 of the actuator 103 arise, namely where in the contact position 145 of the shutter 149 is present. Will be out of the in Fig. 1 On the left-hand side shown, the actuating device 103 is pivoted to the rear, the closure web 149 is pivoted through the wall bushing 154 and thus through the wall 502 into the electrical construction device 500. At the same time, a gap 148 is created between the wall 172 and the cover cap 153 at the position where the closure web 149 was previously arranged. Upon further pivoting into the open position 144, the gap 148 is finally closed again by the deflector 155 so that no gap 148 in the open position is available. The gap 148 is spaced from the conductor receptacle 115 and independent of the conductor receptacle 155.

Fig. 2 shows a highly schematic plan view of an electrical device 500 with a wall 502, to which a feedthrough terminal 100 is added, from the in Fig. 2 for clarity, only the outer housing 170 is shown. In the interior of the outer housing 170 lugs 177 and 178 are provided, on which the inner housing 160 is locked during assembly.

In Fig. 2 the shape of the locking units 210 can be seen, which are designed as latching arms 211. The outwardly of the terminal housing 150 away extending legs of the latching arms 211 are covered here by acting as an abutment member 173 support wall. The width of the support wall 173 corresponds exactly to the outer distance of the two in Fig. 2 visible latching arms 211. This will ensure, as still with respect to the Fig. 4 It is explained that while the latching arms can momentarily pivot inwards when mounted on the wall 502 inwardly, but are later held outwardly by the latching units 220 cooperating with the latching arms, the cross section of the wall ducting 154 remains free.

Fig. 3 shows a perspective view of the terminal housing 150 and its outer housing 170 with the first housing portion 140 on a first side 142 of the contact portion 172 and thus outside of the electrical device 500. On the second side 143, the second housing portion 141 is disposed within the housing 501. The second housing section 141 serves as a fastening section, on which the abutment elements 173 together with the latching arms 211 and the walls 174 provide a peripheral wall. As a result, the interior of the second housing portion 141 is mechanically protected from influences and touches when z. B. the actuator 103 is partially immersed in the second housing portion 141.

The latching arms 211 are configured at the free ends 216 approximately U-shaped. Between the returning leg 215 and the latching arm 211, a groove 213 is provided, in which a part of the latching unit 220 is immersed.

On the outer transverse surface 214, an engagement unit 217 is provided, which here forms as a latching toothing or comprises a plurality of latching teeth. The latching teeth 217 on the opposite latching arms 211 are each arranged on the outer surfaces facing away from each other, each transverse to the transverse direction 204 (see. Fig. 4 ) lie. The outer surfaces may be arranged perpendicular to the transverse direction 204, but are arranged in particular at a slight angle between 0 ° and 30 ° thereto.

Conditioned by the grooves 212 between the side wall and the latching arms 211, the latching arms 211 can deflect elastically during assembly.

Fig. 4 shows a bushing 100 mounted on a wall 502 of an electrical device 500, in which a part of the second housing portion 141 of the terminal housing 150 is schematically visible behind the wall 501. In principle, however, the terminal housing 150 is also suitable for use with other electrical connection terminals.

For fixing the lead-through terminal 100, a latching system 201 is provided, which here comprises four latching units 210 and four latching units 220. The locking units 210 are formed as resiliently received on the terminal housing 150 latching arms 211, which extend to its free end 216 back. There, the latching arms 211 are U-shaped, so that the latching groove 213 is suitable for receiving the latching units 220. The latching units 220 designed as latching connectors 221 can be individual separate parts, as shown in FIG Fig. 4 or they may be interconnected via, for example, a flexible connector 225 or a bracket, as shown in FIG Fig. 5 is shown enlarged.

Each snap-in connector 221 has a latching body 222, which has an approximately wedge-shaped structure 223, in order thereby to be able to effect clamping on walls 502 of different thicknesses.

For assembly, the second housing portion 141 of the terminal housing 150 is pushed through the opening in the wall 502, wherein the elastic latching arms 211 briefly elastically bend inwardly when the respective latching arm 211 passes the wall 502. Thereafter, the latching arms 211 snap outward again. Then the terminal housing 150 can not be easily removed again. For attachment of the terminal housing 150 then the locking units 220 are attached. In this case, the latching connector 221 are plugged with its groove 226 on the legs 215 of the latching arms 211, so that the latching elements 217 on the transverse surface 224 in latching connection with the latching teeth 227 to the latching connectors 221 device. In the movement of the latching connector 221 in the latching direction 202, the ends of the latching arms 211 are clamped by the wedge-shaped latching body 222 of the latching connector 221 and pushed away from the wall 502. Thus, even with different wall thicknesses or wedge-shaped or staircase-like walls 502 can be provided for a secure fit. The locking toothing 227 extends transversely to the connecting direction. The locking teeth 217 and 227 are respectively provided on transverse surfaces 214 and 224, which abut each other in the mounted state.

At the four individual locking arms 211 is individually clamped here, so that different wall thicknesses at the individual locking arms 211 play no role.

In assembled condition, as in Fig. 4 illustrated, the support wall 173 forms an abutment element, against which the adjacent latching arms 211 are supported. This ensures that the wall duct 154 or the space between the support walls 173 remains free. If an elastic latching arm 211 does not bend elastically outwardly again after being inserted into the wall 502, the latching arm 211 is pulled outwards by the latching connectors 221, since the latching connectors 221 are supported with their latching members 222 on the support wall 173 as an abutment ,

Thus, a reliable function of the feedthrough terminal 100 can be ensured because during the transfer of the actuator 103 from the contact position 145 to the open position 144, the clamping spring 101 and other components of the actuator are partially pivoted through the wall duct 154 therethrough. Therefore, it must be ensured that the installation space in the interior of the electrical construction device 500, which the second housing section 141 occupies, does not provide any obstacles in the pivoting movement.

Fig. 6 shows a schematic perspective view of an opened feed-through terminal 100 without outer housing 170 but with mounted inner housing 160 made of plastic, on which the holder 108 is received in metal. The holder 108 of the feedthrough terminal 100 has an approximately U-shaped cross section and consists here of a bending stamped part. On the holder 108 of the current bar 110 is added.

The feedthrough terminal 100 is shown in the open position 144, in which a conductor to be connected from above in the conductor receptacle 115 can be pivoted. Optionally, a ladder can also be inserted from the front.

Slants 161 and 162 are provided as an insertion aid in the plastic wall of the inner housing 160 on the conductor receptacle 115. The detent openings 165 and 166 on the lateral outer walls are provided for receiving the lugs 177 and 178 on the inner walls of the outer housing 170, whereby the terminal housing is fixed in itself.

The actuator 103 is covered by a cap 153. At the cap 153 of the closure bar 149 is provided which closes a gap 148 between the abutment wall or the abutment portion 172 and the wall duct 154 in the contact position 145. In the open position 144, the deflector 155 closes the gap 148. In the contact position 145, the wall 185 covers the conductor receptacle 115 at the top. In addition, the wall 185 may define an insertion funnel for a tool. Such an insertion funnel can be provided when side walls connect the deflector 155 and the wall 185, so that the tool holder 109 is funnel-shaped surrounded by walls.

An opening 158 on the cap 153 can be seen laterally, with which an insert device 118 with projections 157 is latched from the inside.

In the conductor receiving 115 Durchsteckschutz 117 is provided which prevents too deep insertion of a conductor to be connected. The push-through protection 117 is connected to a groove 116 (see. Fig. 9 ) and prevents the insertion of an inserted conductor and also secures the current bar 110 within the holder 108th

Furthermore, the clamping lever 102 with the clamping edge 122, and the auxiliary lever 104 with the cross connector 105 can be seen. The auxiliary lever 104 is rotatably received on the holder 108 about the axis of the pin 151. Of the insert 118, only the plug-in protection 156 can be seen here, which reliably prevents insertion of a conductor into the region of the clamping spring 101 above the conductor receptacle 115 in the open position 144.

Fig. 7 shows the insert 118 on the clamping spring 101. The insert 118 is part of a multi-functional inner part 186. The inner part 186 includes the insert 118 with the receiving opening 132 (see. Fig. 9 ) and the plug-in protection 156 and also the locking lugs in the form of projections 157 for fixing the cap 153. The two locking lugs 157 are laterally outwardly and latch with the two side openings 158 in the cap 153.

The clamping spring 101 provides the clamping force required at the feed-through terminal 100. The clamping spring 101 with its overall approximately C-shaped in side view has in the interior of the "C" on here designed as a plastic insert insert device 118, and serves as an abutment for a tool 120 (see. FIG. 9 ) in the operation of the feed-through terminal 100. The clamping spring 101 is here loaded on train, so that in the load case, the two legs 136 and 137 of the clamping spring 101 from each other. The "C" is opened in the direction of the conductor receptacle 115.

The clamping spring 101 also serves as an actuating device 103 or as an actuating lever and comprises, in addition to the clamping spring 101 still the plastic insert and the in Fig. 8 illustrated cover cap 153. On the second leg 137 of the clamping spring 101, a tool opening 109 is provided, through which a tool 120 can be introduced as a screwdriver to the feedthrough terminal 100 from the open state 144 in the clamping state 145 and back with the movement of the screwdriver to convict. The receiving opening 132 or the wall surrounding the receiving opening 132 in the insert device 118 serves as an abutment during the actuation. The insert device 118 has an insert body 118a, a retaining leg 118c, in particular an elastic design, and a gap 118b therebetween. This makes it possible that the insert device 118 also bears against the two legs 136, 137 of the clamping spring 101 during spring movements. The retaining leg 118c may be fixedly connected to the first leg 136 of the clamping spring 101 or clamped thereto.

Visible are the second pivot axis 114 on the first leg 136 of the clamping spring 101 and the axis 112 on the second leg 137. The projections 157 engage with the openings 158 in the cap 153. About a web 187 is the plate-shaped plug-in protection 156 with the insert body 118a in particular integrally connected.

Fig. 8 shows the clamping spring 101 with the insert 118 and the mounted cap 153. At the opening 158 of the protrusion 157 of the insert 118 can be seen. At the bottom of the rear gate 149 and the top of the deflector 155 can be seen. If side walls are provided, as indicated by the dashed lines, an insertion funnel for the tool 120 is available.

FIG. 9 shows a schematic sectional side view of the feedthrough terminal 100 with an insert 118, which is designed as a plastic insert. Only the bracket 108 is shown while the terminal housing 150 is in Fig. 9 not shown. By pivoting the tool 120 clockwise, ie, in the direction of the clamping lever 102, the electrical lead-through terminal 100 of the in Fig. 9 shown opening state 144 in the clamping state 145 transferred.

On the clamping lever 102, the first pivot axis 113 and the second pivot axis 114 are received. The clamping lever 102 is pivotable in total about the first pivot axis 113 received on the holder 108, so that with the pivoting of the clamping lever 102 and the clamping edge 122 of the clamping lever 102 is pivoted.

At the second pivot axis 114 of the clamping lever 102, the first leg 136 of the clamping spring 101 is rotatably received. The second leg 137 of the clamping spring 101 is opposite the first rotary unit 129 (see. FIGS. 11 and 12 ) of the auxiliary lever 104 pivotable. The second rotary unit 130 of the auxiliary lever 104 is rotatably received on the circular recess 106 on the round recess 106 of the holder 108.

In Fig. 9 the insert 118 is visible in section. In order to better recognize the other components, the plug-in protection 156 with the web 187 has been omitted here in the illustration. In the insertion device 118, a receiving opening 132 for receiving a tool 120 is provided. In this case, an inner diameter 109a of the tool opening 109 in the clamping spring is provided with a larger diameter than the inner diameter 132a of the As a result, the clamping spring 101 can be provided for use with different insertion devices 118 or with plastic inserts with different receiving openings 132. This allows the provision of different feedthrough terminals 100, in which only the insert 118 differs and thus changes the operating angle. Fig. 11 schematically shows two different angles, which are exemplified by arrows 133 are drawn.

The clamping lever 102 has two parallel side walls, between which the clamping edge 122 is provided. Also, the clamping lever 102 is designed here as a one-piece stamped and bent part.

In the current bar 110, a groove 116 is provided, in which a rod-shaped push-through protection 117 is executed, which is received in corresponding lateral openings in the walls 123 of the holder 108. As a result, a fuse of the current bar 110 takes place in the axial direction and also a push-through protection for a conductor 126 is possible.

Furthermore, a groove 131 is provided in the current bar 110, which is arranged where the clamping edge 122 presses an inserted conductor 126 against the current bar 110. As a result, conductor 126 can deform into the groove 131 during the clamping process, so that an effective pull-out protection can be ensured.

In the sectional view according to FIG. 9 the first axle receptacle 127 can be seen cut on the first leg 136 of the clamping spring 101. In this case, the first axle receptacle 127 engages around the second pivot axis 114 of the clamping lever 102.

At the other end of the clamping spring 101, namely the second leg 137, the second axle receptacle 128 can be seen cut, which surrounds the axis 112 of the first rotary unit 129 of the auxiliary lever 104.

Shown in section is the guide axis 151 in the hole 111 or the virtual axis of rotation of the second rotary unit 130 of the auxiliary lever 104.

FIG. 10 shows a plan view of the electrical feedthrough terminal 100. On the clamping spring 101, the tool opening 109 can be seen. The auxiliary lever 104 engages with the cross connector 105, the second leg 137 of the clamping spring 101. The clamping lever 102 has the right aligned clamping edge 122, which engages in the clamping state in the groove 131 or a conductor against the groove 131 of the current bar 110 suppressed.

With reference to the FIGS. 11 to 13 In the following, the function of the electrical feedthrough terminal 100 will be explained. In FIG. 11 schematically a cable 125 is shown with an electrical conductor 126. In the representations according to the FIGS. 11 to 13 Various parts of the electrical feedthrough terminal 100 have been omitted in order to better illustrate the function. So was in the FIGS. 11 to 13 the terminal housing 150 is omitted, as well as the holder 108. It should be noted, however, that the clamping lever 102 is fixedly connected to the holder 108 via the first pivot axis 113. In addition, the second rotary unit 130 of the auxiliary lever 104 is supported with the round outer shape 107 on the correspondingly round recess 106 of the holder 108 here fixed, namely on the not shown here round recess 106 in the holder 108th A housing 501 of an electrical construction device 500 is shown in a very schematic and dashed manner in order to illustrate the movement sequences.

The opening angle 146 between the current bar 110 and the clamping edge 122 of the clamping lever 102 is here more than 75 ° and almost 90 °. Depending on the geometric design of the clamping lever 102, the opening angle 146 can be selected even larger. As a rule, however, this opening angle 146 is sufficient to be able to pivot in particular also rigid conductors 126 with large cross-sections into the pivoting region 115 from above.

While FIG. 11 the opening state 144, shows FIG. 12 an intermediate state in which the clamping lever 102 has already been significantly pivoted. This is done by introducing a tool into the tool opening 109 on the clamping spring 101 and in the illustration according to FIG FIGS. 11 to 13 is pivoted clockwise. In the transfer of the in FIG. 11 in the in FIG. 12 shown state, the pivoting virtually powerless, since the distance between the two legs 136 and 137 of the clamping spring 101 is not or almost not changed and thus the spring tension practically does not change. This achieves a pleasant operation.

For ladders with very large cross-sections may be in the in FIG. 12 shown state almost a concern of the clamping edge 122 can be achieved on the conductor 126. In the transfer of the in FIG. 11 in the in FIG. 12 shown state pivoting of the clamping lever 102, the Clamping spring 101 and the auxiliary lever 104 are coupled to each other.

FIG. 13 shows the clamping state 145. Of course, it can be seen that a zero clamping can be achieved in which even conductors with the smallest cross-section can be clamped. The clamping edge 122 is located in FIG. 13 in the groove 131 of the current bar 110 at. When swiveling from the in FIG. 12 shown state in the clamping state 145 according to FIG. 13 the clamping spring 101 is tensioned, wherein the distance of the first leg 136 from the second leg 137 widens. Due to the stable clamping spring 101, therefore, a high clamping force is generated.

A comparison of FIGS. 11 to 13 shows that the actuator 103 in the contact position 145 after Fig. 13 to a greater extent on the first side 142 than in the open position 144 in FIG Fig. 11 in that the actuating device 103 at least partially and the clamping spring 101 even extends to the most essential part through the wall duct 154 on the second side 143 back. This means that the actuating device 103 and in particular the clamping spring 101 in the open position 144 at least partially immerse in the housing 501 of the electrical device. In the open position 144 is a substantial part on the second side 142 and thus within the housing 501. In this case, there is a significant proportion of the volume, the mass and also the cross-sectional area on the second side 143. In the contact position 145, the actuator 103 remains substantially or even completely on the first side or outside 142.

Therefore, the construction volume of the feed-through terminal can be significantly reduced. Part of the required volume is used on the inside of an electrical appliance where there is usually enough room. In particular, if on the second side of the lead-through terminal another connection is provided. It is possible z. B. that the current bar continues directly.

In FIG. 13 is shown a self-inhibited state. During the pivoting of the clamping spring 101 and the auxiliary lever 104, a dead center was exceeded, so that in the clamping state 145, the clamping spring 101 is slightly relaxed relative to the maximum bias. This achieves a stable state. The self-inhibited state is here recognizable by the fact that the connecting line 119 between the axis 112 and the second pivot axis 114 runs just below the center of the hole 111 or the virtual axis of rotation of the second rotary unit 130 of the auxiliary lever 104. As a result, when transferring the electrical lead-through terminal into the opening state 144, the clamping spring 101 must first be preloaded in order to overcome the dead center.

The second pivot axis 114 is in Fig. 13 shown dashed, since it is behind the second rotary unit 130 of the auxiliary lever 104 and thus would not actually be visible in this illustration.

Overall, a very advantageous electrical feedthrough terminal 100 is provided. The lead-through terminal is rowable and can be made from simple components.

The executed as a tilting lever clamp electrical lead-through terminal 100 has a dynamic lever translation, in which at the beginning of the closing operation, the clamping edge 122 covers a long way and in the further closing with little force a relatively long path is covered with the tool, resulting in a high clamping force is implemented.

Both the clamping spring 101 and the clamping lever 102 and the auxiliary lever 104 and the bracket 108 may be made of stamped and bent parts. This allows a simple and cost-effective production, also for mass production. The maximum opening angle 146 can be made very large, so that even the most massive ladder can be pivoted into the upwardly open pivoting region 115.

Settling phenomena in the spring or other components are reliably avoided, and by a suitable selection of the wall thicknesses of the clamping spring 101 and the other dimensions basically arbitrarily high clamping forces can be applied.

For supporting the auxiliary lever 104 with the second rotary unit 130 on the holder 108, the second rotary unit 130 may have a round outer contour 107 which engages in a correspondingly round recess 106 of the holder 108. This is possible because no tensile forces occur, so that at the hole 111 a simple plastic pin 151 of the housing 150 is sufficient. LIST OF REFERENCE NUMBERS Through terminal 100 clamping spring 101 clamping lever 102 actuator 103 auxiliary lever 104 cross-connector 105 recess 106 external form 107 bracket 108 mold opening 109 current bar 110 hole 111 axis 112 First pivot axis 113 Second pivot axis 114 Ladder support, swivel range 115 groove 116 Push-through protection 117 insert means 118 insert body 118a gap 118b holding leg 118c connecting line 119 Tool 120 clamping edge 122 Side, wall 123 electric wire 125 ladder 126 First axle mount 127 Second axle mount 128 First turntable 129 Second turntable 130 groove 131 receiving opening 132 diameter 132a arrow 133 First leg 136 Second thigh 137 1st housing section 140 2. Housing section 141 1st side, outside 142 2nd side, inside 143 Opening state, open position 144 Clamp status contact position 145 opening angle 146 gap 148 locking bar 149 Housing, terminal housing 150 spigot 151 cap 153 tool access 153a Wall bushing 154 deflector 155 Plug-in 156 Latch, projection 157 opening 158 inner housing 160 slope 161, 162 latching opening 165, 166 outer casing 170 Plant section, plant wall 172 Counter bearing element, retaining wall, wall 173 wall 174 nose 177, 178 wall 185 Multifunctional inner part 186 web 187 detent system 201 Ratchet direction, 1st direction 202 transversely 204 catch unit 210 detent arm 211 groove 212, 213 transverse surface 214 leg 215 Free end 216 engagement unit 217 catch unit 220 Rest connector 221 latching body 222 Wedge-like shape 223 transverse surface 224 Strap / connector 225 groove 226 locking teeth 227 electrical construction device 500 casing 501 wall 502

Claims (12)

1. A lead-through terminal (100) having a terminal housing (150) which can be accommodated on a wall (501) of an electrical construction means (500), a wall duct (154) and a pivotable actuating device (103) being provided on the terminal housing (150), it being possible to pivot the actuating device (103) at least between a contact position (145) and an open position (144) and the actuating device comprising a clamping lever (102) and a clamping spring (101) for clamping a conductor (126) on a conductor mount (115) in the contact position (145) and for releasing or accommodating the conductor (126) on the conductor mount (115) in the open position (144),
   Characterized
   in that a closure web (149) is provided on the actuating device (103), which is configured to close a gap (148), present during the pivoting of the actuating device (103) between the open position (144) and the contact position (145), between the actuating device (103) and the wall duct (154) at least in the contact position (145), wherein the closure web (149) leads to a complete closure of the gap (148) at the wall duct (154) in the contact position (145).
2. The lead-through terminal (100) according to the preceding claim, wherein the actuating device (103) comprises a cover cap (153).
3. The lead-through terminal (100) according to Claim 2, wherein the cover cap (153) consists at least to some extent of an insulating material.
4. The lead-through terminal (100) according to Claim 2 or 3, wherein the closure web (149) is provided on the cover cap (153).
5. The lead-through terminal (100) according to one of the preceding claims, wherein the gap (148) in the open position (144) is closed by a deflector (155).
6. The lead-through terminal (100) according to one of the preceding claims, wherein a tool opening (109) is provided on the actuating device (103).
7. The lead-through terminal (100) according to one of Claims 2 to 6, wherein the cover cap (153) is fixed on an insert device (118) on the actuating device (103) and in particular latched on at least one latching lug (157) of the insert device (118).
8. The lead-through terminal (100) according to one of the preceding claims, wherein the actuating device (103) dips at least partially into the wall duct (154) during the pivot movement.
9. The lead-through terminal (100) according to one of the preceding claims, comprising a holder (108), on which a current bar (110) is accommodated, wherein the actuating device (103) comprises at least one clamping spring (101) for applying a clamping force for clamping a conductor (126) on the current bar (110), and wherein the clamping spring (101) has a first leg (136) and at least one second leg (137) and is coupled by way of the first leg (136) in an articulated manner to the clamping lever (102) and by way of the second leg (137) in an articulated manner to an auxiliary lever (104), and wherein the clamping lever (102) and the auxiliary lever (104) are pivotably arranged on the holder (108).
10. A lead-through terminal (100) according to the preceding claim, wherein a first pivot pin (113) and at least one second pivot pin (114) spaced therefrom are arranged on the clamping lever (101), and wherein the clamping spring (101) has a first pin mount (127) and at least one second pin mount (128) spaced therefrom, and wherein an auxiliary lever (104) is provided, which has a first rotary unit (129) and at least one second rotary unit (130) spaced therefrom.
11. The lead-through terminal (100) according to one of the two preceding claims, wherein an opening angle (146) between the current bar and the clamping lever (102) at the conductor mount (115) in the open state is greater than 45° and in particular greater than 60° and preferably greater than 75°.
12. The lead-through terminal (100) according to one of Claims 6 to 11, wherein an internal diameter (109a) of the tool opening (109) is larger than an internal diameter (132a) of an accommodation opening (132) of the insert device (118).

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