EP1662534B1 - Module for releasably latching to a circiut breaker - Google Patents

Abstract

The component has a box-shaped housing with two sides (41, 42) running parallel to one another for supporting a protective device. A connecting unit (6) is rotatably formed and is movably and axially guided along a rotating axis through a front side of the housing. The connecting unit includes a guiding body (65) axial symmetrical and supported in the housing and a head (62) with a hook (61) arranged outside the housing.

Description

TECHNICAL AREA

The present invention relates to a component for releasably attaching to an electrical protective device according to the preamble of claim 1. The coupled with such a component protective device is preferably used in low-voltage distributors on the basis of a mounting rail or a socket with parallel guided and held on the socket busbars. In low-voltage distribution systems, the power supplied from a low-voltage grid is distributed to components such as cables, motors or apparatus, or to equipment, by means of built-in circuit breakers. The installation circuit breakers are designed as circuit breakers. The live components and systems are therefore protected against the consequences of overload and short-circuit currents. Protective devices designed as surge arresters protect the components and systems against overvoltage. Components with specific functional groups can be detachably fastened to the protective devices, which can be installed together with the protective device in the low-voltage distributor or removed from the distributor.

STATE OF THE ART

An installation part of the type mentioned is described in US-A-4 591 228 , This mounting part has two wide housing sides, on each of which one of two other mounting parts is placed. The built-in part further includes two narrow sides of the housing, in each of which a dovetail profile groove is formed, in the groove bottom, two oppositely oriented and each formed in the manner of a saw tooth cam. The groove extends from the first to the second wide side of the housing and serves to guide a connecting part designed as a slide. The connecting part has two counter-aligned hooks. If the slide from a central position, in which the slide is completely covered by the narrow side of the housing and protrudes into any of the two wide sides of the housing, shifted to the right, so he and thus the first of the two hooks is guided in the groove of the adjoining fitting , The pushing operation is completed and thus the component fixed to the adjacent component when the second hook of the slider abuts one of the two cams of the component. The first hook of the slider then engages behind one of the two cams of the adjacent built-in part. If the slider is moved in the reverse direction from the central position, the component is fixed to the other adjacent component.

Another installation part is described in the technical catalog smiss-line S "Innovation with system - Protection devices with plug-in technology" from ABB Switzerland Ltd, Normelec / CMC Components PO Box CH-9048 Zurich / Switzerland. The known installation part has a box-shaped housing for receiving a functional group. A preferred fitting is a Neutral conductor separator or a contact block with auxiliary or with signal contacts, which are each assigned to a designed as a switch protection device.

The previously known component has at the corners of one side of a substantially box-shaped component housing four each formed as snap hooks connecting elements. To attach to the protective device of this snap hook are engaged in two corresponding wells of the protective device and the component slightly pivoted in the manner of a hinge until it rests with its hook-carrying side of the housing on the device. The remaining two snap hooks snap into two corresponding recesses on the protective device and thus fix the component to its snap-cap-bearing housing side on the protective device.

After mounting, the components are in frictional contact with a release mechanism and / or a handle of the protection device. It can be up to three juxtaposed components are mounted on the protective device, however, a mounting of a component on one of the snap-hook-carrying housing side opposite housing side is not possible.

PRESENTATION OF THE INVENTION

The invention, as indicated in the claims, the object of the invention is to provide a component of the type mentioned, which can be attached to two of its sides in a simple and rapid manner to a protective device and, if necessary, can be easily solved by the device.

The component according to the invention comprises two housing sides which can be provided for supporting the protective device and a rotatably formed connecting element which is axially displaceably guided along the axis of rotation by an end face of the housing adjoining both sides of the housing and has an axisymmetric guide body mounted in the housing and an outside of the housing Housing arranged and carrying a hook head. Such a component is placed on the protective device when installed in a protective device with any of its two sides of the housing and can then by simple engagement of the previously suitably positioned by twisting and axial displacement fastener are fixed by finger pressure on the protection device.

In order to achieve the suitable position for mounting the connecting element by simple means, at least one inclined to the rotational axis arranged surface is formed in the guide body, which is mounted in a form-locking generated by rotation axial displacement of the connecting element on at least one held in the housing counter surface. A uniform load of this bearing and the guide body is achieved when in the guide body one of two inclined surfaces arranged wedge is formed.

A stable position of the connecting element prior to engagement with the housing is achieved by a latching hook held in the housing and by a molded into the guide body, rotationally symmetrical track formed. This guideway biases the snap hook when turning and moving the connecting element. In a predetermined position of the guideway, the prestressed tension hook then acts on the connecting element with an outwardly directed holding force. The connecting element can therefore be rotated in this position, without an axial displacement occurs.

The leadership and positioning of the connecting element is thereby substantially facilitated that in the guide body two rotatably mounted in the housing sliding body and a stop are formed.

In order to facilitate the performance of the assembly work, two slots are formed in the head of the connecting element, of which a first of the introduction of a torque and the second of the initiation of a thrust force is used.

Further advantageous embodiments of the component according to the invention and a structural unit for insertion into a low-voltage distribution with an executed as a circuit breaker electrical protection device and with an am Circuit breaker detachably mounted component according to the invention will become apparent from the following part of the description and the drawings.

BRIEF DESCRIPTION OF THE FIGURES

Fig.1

eine Seitenansicht einer teilweise geschnitten dargestellten Ausführungsform eines Bauteils nach der Erfindung,

Fig.2

eine von links auf das Bauteil gemäss Fig.1 geführte Ansicht einer ein Schutzgerät und das daran festgesetzte Bauteil umfassenden Baueinheit,

Fig.3

eine Ansicht der Baueinheit gemäss Fig.2 von unten,

Fig.4

in Vergrösserung ein geschnitten dargestellter Bereich des Bauteils gemäss Fig.1 mit einem in einem Gehäuse des Bauteils drehbar und axial verschiebbar gelagerten Verbindungselement,

Fig.5

eine Ansicht des Bereichs gemäss Fig.4 von rechts vor Ausführung des Schnitts,

Fig.6

der Bereich gemäss Fig.4 nach Verdrehen des Verbindungselements um einen Winkel von ca. 90°,

Fig.7

eine Ansicht des Bereichs gemäss Fig.6 von rechts vor Ausführung des Schnitts,

Fig.8

der Bereich gemäss Fig.6 nach Verdrehen des Verbindungselements um einen weiteren Winkel von ca. 90°,

Fig.9

eine Ansicht des Bereichs gemäss Fig.8 von rechts vor Ausführung des Schnitts.

With reference to drawings, an embodiment of the invention will be explained in more detail below. Hereby shows:

Fig.1

a side view of a partially sectioned embodiment of a component according to the invention,

Fig.2

one from the left on the component according to Fig.1 Guided view of a protective device and the component fixed thereto comprehensive unit,

Figure 3

a view of the unit according to Fig.2 from underneath,

Figure 4

Enlarged a section of the component shown in accordance with Fig.1 with a connecting element rotatably and axially displaceably mounted in a housing of the component,

Figure 5

a view of the area according to Figure 4 from the right before execution of the cut,

Figure 6

the area according to Figure 4 after twisting the connecting element by an angle of about 90 °,

Figure 7

a view of the area according to Figure 6 from the right before execution of the cut,

Figure 8

the area according to Figure 6 after rotation of the connecting element by a further angle of about 90 °,

Figure 9

a view of the area according to Figure 8 from the right before execution of the cut.

WAY FOR CARRYING OUT THE INVENTION

In all figures, like reference numerals refer to like-acting parts. In Fig.1 is executed as a contact block component 1, which with a circuit breaker 2 to one of the FIGS. 2 and 3 apparent unit 3 can be joined together. This unit is intended for insertion into a low-voltage distributor, in particular on the basis of a plug-in base system or a mounting rail. According to the FIGS. 1 to 3 the component 1 has a substantially box-shaped housing 4 made of a polymeric insulating material. The housing 4 is formed by joining two parts, one of which rests in the assembly 1 with a housing side 42 on the protective device 2 and the other then has a freely accessible housing side 41. The housing 4 receives auxiliary or signal contacts of the protective device 2 designed as a switch.

The component 1 can also be designed as a neutral conductor separator. The correspondingly formed housing 4 then takes on the neutral active part instead of the auxiliary or signal contacts. Instead of the active part or the auxiliary or signal contacts, the housing 4 can also accommodate another functional group. In any case, the component 1 contains, in addition to the housing 4 and the functional group enclosed by the housing and therefore not apparent, two connection elements 5 and 6 (4) held on the housing 4 (FIG. Fig. 1 ), with which it is detachably connected to the protective device 2 in the unit 3.

The two connecting elements 5,6 are each formed in one piece and each have a rotatably mounted on a front side 43 and 44 of the housing 4 and a hook 51 and 61 supporting head 52 and 62 on ( Figure 3 ), in each of which a slot for receiving a generally designed as a screwdriver tool. Out Fig.2 only the slot 53 introduced into the head 52 can be seen. The two heads can be rotated by 180 °. The connecting element 5 is self-locking. The hook 51 therefore remains in the position in which it has just been guided by turning the connecting element 5. The connecting element 6 is along a rotation axis 64 (FIG. Fig.1 ) axially displaceably guided by the end face 44 of the housing 4 and has in addition to the arranged outside the housing head 62 a mounted in the housing 4, axially symmetrical guide body 65.

The end faces 43, 44 are opposite each other in the housing 4 and each connect to the housing sides 41 and 42 at. In order to fulfill the connection function to the protective device 2, the two connecting elements 5, 6 are guided to the housing side 42 serving for the support of the protective device 2 ( Figure 3 ) and grab with their hooks 51 resp. 61 in wells of the protective device 2 a. Out Fig.1 it can be seen that the connecting elements 5, 6 with respect to the housing side 41 are diagonally opposite each other. This supports the connection function.

From the FIGS. 2 and 3 It can be seen that in the assembly 3, the component 1 can not only rest with the housing side 42 on the protective device 3, but that alternatively the component 1 can also rest with the housing side 41 on the protective device (dashed line shown component 1). As described above, this is made possible on the one hand by the rotatable arrangement and the suitable design of the connecting elements 5 and 6, and on the other hand by the fact that both housing sides 41 and 42 are designed to support the protective device 3. Therefore, both sides of the housing 41, 42 each have openings 45 (in Fig.1 only shown for the housing side 41) for carrying out a transmission element 46 connected to the functional group.

From the FIGS. 4 and 5 It can be seen that the guide body 65 contains two sliding bodies, of which one is designed as a pin 651 and the other as a shaft 652. The two sliding bodies 651 and 652 are held in two non-designated bearings, which are molded into the housing 4. The bearing shaft 652 is guided by the end face 44 of the housing 4 and carries at its end located outside of the housing 4 the head 62 and at its part located in the gel housing a stop 653 and a rotationally symmetrical guide track 654 for a molded into the housing 4 snap hook 47th An The bearing journal 651, which is likewise mounted in the housing, is adjoined by a cylindrical extension 655 into which two surfaces 656 and 657, which are inclined relative to the axis of rotation 64, are formed to form a wedge 658. Out Figure 5 is the provided for the introduction of a torque in the connecting element 6 and now marked with the reference numeral 63 slot visible.

In the FIGS. 4 and 5 the state of the connecting element 6 during delivery of the component 3 is shown. As can be seen, the snap hook 47 then holds the connecting element 6 in a defined position, in which the hook 61 protrudes beyond the end face 41 ( Figure 5 ). The two surfaces 656 and 657 of the wedge 658 lie on two mutually inclined surfaces 481 and 482, which for reasons of clarity only in Figure 6 are designated, molded into the housing 4 bearing 48.

By rotating the connecting element 6 in the counterclockwise direction with the aid of a screwdriver guided into the slot 63, an axial thrust force is generated by the surfaces 656 and 657 supported on the surfaces 481 and 482 of the bearing 48 in the manner of a screw drive, which displaces the connecting element 6 to the right , After a rotation of 90 ° is from the FIGS. 6 and 7 apparent stable position is reached, is aligned in the wedge with its tip 659 perpendicular to the surface 481 and 482 and thus prevents engagement of the connecting element 6 (to the left). An engagement is counteracted by the clamping hook 47. This clamping hook was first performed when moving the connecting element 6 to the right on the rotationally symmetrical guideway 654 radially outward, thereby biased and biased in the from FIGS. 6 and 7 apparent position on the guide body 65 fixed. As can be seen, in this position, the connecting element 6 is displaced axially to the right by a distance a. As Figure 7 can be removed, then the hook 61 is aligned downward.

To attach the component 1 with its housing side 42 on the protective device 2, the head 52 in the from the FIGS. 2 and 3 rotated apparent self-locking position in which the hook 51 projects beyond the housing surface 42. In the appropriate position and the hook 61 is brought. This is done by turning the in the FIGS. 6 and 7 achieved connecting element 6 by approximately 90 ° in the counterclockwise direction. It is here from the FIGS. 8 and 9 reached apparent position in which the wedge tip 659 while maintaining the Distance a is aligned parallel to the two surfaces of the bearing 48. The hook 61 protrudes beyond the surface 42 ( Figure 9 ). By finger pressure, the connecting element 6 is now pressed to the left in the housing 4 and in this case the hook 61 in the off Figure 3 led apparent position in which the component 1 is fixed to the protective device 2. The snap hook 47 now takes those out again Figure 4 apparent position.

To release the component 1, the connecting element 6 by means of a screwdriver on a Figure 8 apparent slot 66 raised again.

If the component with the housing side 41 rest on the protective device 3, so both hooks 51 and 61 are rotated in each case by 180 °. When hook 61 this is achieved in that in the position according to the FIGS. 6 and 7 the hook 61 is rotated 90 ° clockwise. The component 1 then takes in the FIGS. 2 and 3 dashed line position shown.

LIST OF REFERENCE NUMBERS

1

component

2

apparatus

3

unit

4

casing

41, 42

housing sides

43, 44

Front sides of the housing

45

openings

46

transmission element

47

tenterhook

48

camp

481, 482

storage areas

5, 6

fasteners

51, 61

hook

52, 62

heads

53, 63

slots

64

axis of rotation

65

guide body

651

Sliding body, bearing pin

652

Sliding body, bearing shaft

653

attack

654

guideway

655

extension

656.657

wedge surfaces

658

wedge

659

Keilspitze

66

slot

a

distance

Claims (12)

1. Module (1) for detachable fastening to an electrical protective device (2), containing a box-shaped housing (4), which accommodates a functional group, with two housing sides (41, 42), which are arranged parallel to one another, and with at least two connecting elements (5, 6), which are held on the housing (4) and can be lead to a first or second housing side (42) provided for positioning the protective device (2), and of which a first connecting element has a head (62), which is arranged outside the housing (4) and bears a hook (61), characterized in that the first connecting element (6) is designed to be capable of rotating and is guided so as to be axially displaceable along the axis of rotation (64) through a first end side (44), which adjoins the first and the second housing sides (41, 42), of the housing (4) and has an axially symmetrical guide body (65) mounted in the housing (4).
2. Module according to Claim 1, characterized in that at least one face (656, 657), which is arranged so as to be inclined with respect to the axis of rotation (64) and which is mounted in a form-fitting manner on at least one opposing face (481, 482) held in the housing (4) in the event of an axial displacement, produced by means of rotation, of the first connecting element (6), is formed into the guide body (65).
3. Module according to Claim 2, characterized in that a wedge (658), which is delimited by two of the faces (656, 657) which are arranged so as to be inclined, is formed into the guide body (65).
4. Module according to one of Claims 1 to 3, characterized in that a rotationally symmetrical guide path (654) for a snap-action hook (47) held in the housing (4) is formed into the guide body (65).
5. Module according to one of Claims 1 to 4, characterized in that two sliding bodies (651, 652), which are mounted rotatably in the housing (4), and a stop (653) for delimiting the axial displacement are formed into the guide body (65).
6. Module according to one of Claims 1 to 5, characterized in that two slots (63, 66) are formed into the head (62), of which the first slot (63) is used for introducing a torque and the second slot (66) is used for introducing a thrust.
7. Module according to one of Claims 1 to 6, characterized in that the second connecting element (51) is mounted rotatably on a second end side (43), which is opposite the first end side (44), of the housing (4) and has a head (52) which bears a hook (51).
8. Module according to Claim 7, characterized in that the first and the second connecting element are positioned diagonally opposite one another on the first or second housing side (41, 42) intended for the positioning of the protective device.
9. Module according to one of Claims 1 to 8, characterized in that the first connecting element (6) and/or the second connecting element (5) are each configured in one piece.
10. Module according to one of Claims 1 to 9, characterized in that the first and the second housing sides (41, 42) each have at least one opening (45) for passing through a transmission element (46), which is connected to the functional group.
11. Unit (3) for insertion into a low-voltage distribution board with an electrical protective device (2) in the form of a circuit breaker and with a module (1), which is fastened detachably to the circuit breaker, according to one of the preceding Claims 1 to 10.
12. Unit according to Claim 11, characterized in that the module is in the form of a neutral conductor isolator or in the form of a contact block for accommodating auxiliary or signal contacts of the circuit breaker.

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