WO2011137981A1

WO2011137981A1 - Electrical service switching device

Info

Publication number: WO2011137981A1
Application number: PCT/EP2011/002034
Authority: WO
Inventors: Ralf Weber; Erwin Muders
Original assignee: Abb Ag
Priority date: 2010-05-03
Filing date: 2011-04-21
Publication date: 2011-11-10
Also published as: EP2567389A1; EP2567389B1; CN102893356B; CN201956300U; CN102893356A; CN102237208A; DE102011018647B4; DE102011018647A1

Abstract

The invention relates to an electrical service switching device (1) having a switching mechanism having a latching point, having a contact lever (2) which is connected to a switching knob (5) by means of a lug (3) and a coupling element (4), wherein, when the switching knob (5) is pivoted in the switch-on direction, the contact lever (2) is moved to the switch-on position by means of the coupling element (4) and the lug (3) when the latching point is latched, wherein means (10) are provided for temporarily firmly holding the moving contact lever (2) during the switch-on process. An operative connection means (11) is provided between the switching knob (5) and the means (10) in order to move the means (10) to a release position when the switching knob (5) is moved further, the contact lever (2) being released in said release position, with the result that the moving contact piece (6) which is mounted on the contact lever suddenly strikes the stationary contact piece (7).

Description

Electrical service switching device

description

The invention relates to an electrical service switching device with a rear derailleur with Verklinkungsstelle, with a contact lever which is connected via a tab and a coupling element with a switch knob, wherein upon pivoting of the switch knob in the closing direction of the contact lever on the coupling element and the tab with latched Verklinkungsstelle in Switching position is spent, wherein a means for temporarily holding the movable contact lever is provided during the switch-on, according to the preamble of claim 1. A generic service switching device is described in DE 10 2005 029 059 A1. The means for temporarily holding the movable contact lever during the switch-on process cause, when these means are released, a sudden impact of the movable contact piece is effected on the fixed contact piece. Thus, the time of approach of the movable to the fixed contact piece is greatly shortened. Thus, the switch-on is greatly accelerated at least in the time in which an arc can occur. One calls the derailleur then, based on the switch-on, as a derailleur with jump function.

In the embodiment shown in DE 10 2005 029 059 A1, a double-arm lever is provided as a means for temporarily holding the movable contact lever, which interacts in two ways with the contact lever by temporarily holding not only the contact lever, but also by the contact lever itself is released again. The contact lever fulfills it to some extent two partly opposing functions, because on the one hand he should let hold by the means for temporarily holding the movable contact lever, on the other hand release this means that holds him, even again. This solution is mechanically complex to mon-

CONFIRMATION COPY and requires strict adherence to geometrical tolerances, which makes automated, fast assembly complicated and expensive.

It is therefore an object of the present invention to provide a generic service switching device with a switching mechanism with jump function, which is easy to assemble and suitable for fast, fully automated assembly.

The object is achieved by an electrical service switching device having the features of claim 1.

Thus, according to the invention, an operative connection means is provided between the switching knob and the means for temporarily holding the movable contact lever in order to bring the means into a release position when the switching knob is moved, in which the contact lever is released, so that a sudden impact of the contact lever mounted, movable Contact piece is effected on the fixed contact piece.

The advantage of the solution according to the invention is that the means for temporarily holding the movable contact lever is moved via the switching knob in its release position. The interaction of the means for temporarily holding the movable contact lever with the contact lever is thus limited to the temporary hold the contact lever. The function of releasing the means for temporarily holding the movable contact lever is taken over by another component, namely directly from the switch knob. Since the contact lever no longer has to take on two partially opposing functions, the inventive design is mechanically simple, it requires only an additional component and makes less stringent demands on the positioning accuracy and compliance with geometric tolerances. According to an advantageous embodiment of the invention, the operative connection means is an engagement surface on an extension of the switch knob. This ensures a direct engagement of the switch knob with the means for temporarily holding the movable contact lever, without interposition of other elements, which simplifies the assembly. According to an advantageous embodiment of the invention, the means for temporarily holding the movable contact lever comprises a slider which is connected via a coupling part with a lever, wherein the operative connection means acts on the adjusting lever to bring the slider in the release position.

According to an advantageous embodiment of the invention, the slider has a holding extension to temporarily hold the movable contact lever.

The contact lever comprises in an advantageous embodiment, a contact carrier, which is pivotally mounted. At the free end of the contact carrier a contact horn is attached. At the contact horn, the movable contact piece is formed near its free end. Contact carrier, contact horn and contact piece can consist of different materials, which are each optimally adapted to the specific function. Thus, the contact piece made of particularly conductive, but also abrasion and erosion resistant material. If a movable strand is welded to the contact horn, which continues the current path into the device, it is advantageous if the contact horn consists of particularly good conductive material.

In the embodiment of the invention, the slider is arranged so that the contact point of the holding extension is formed on the contact lever on the contact horn near the movable contact piece. The holding extension engages when holding the contact lever on the contact horn, in the vicinity of the contact piece. This has the advantage that for holding the contact lever lower forces of action and better leverage prevail and there is a smaller tolerance effect.

According to an advantageous embodiment of the invention, the slider comprises a slide body, with a slot to hold the slide on a guide sleeve in the housing of the service switching device slidably.

According to an advantageous embodiment of the invention, the adjusting lever is pivotally mounted on a housing-fixed axis, and an arm of the actuating lever is connected to the dome part, and the arm carries at its free end a cam surface to cooperate with the operative connection means on the cam surface. According to an advantageous embodiment of the invention, the axis fixed to the housing is located on the same side as the contact lever with respect to a displacement line defined by the displacement direction of the slider.

According to an advantageous embodiment of the invention, the dome part is formed as a bendable hinge.

According to an advantageous embodiment of the invention, a spring element is provided which biases the actuating lever against the release position of the means resiliently. In an advantageous embodiment of the invention, this spring element can be a leaf spring, which is supported on the interior of the housing and connected to the arm. In a further advantageous embodiment, the spring element can also be a second arm of the adjusting lever, which is supported on a housing projection.

According to an advantageous embodiment of the invention, the means for temporarily holding the movable contact lever is formed as a one-piece injection-molded part made of plastic.

Further advantageous embodiments and improvements of the invention and further advantages can be taken from the subclaims.

Reference to the drawings, in which an embodiment of the invention is shown, the invention and further advantageous refinements and improvements of the invention will be explained and described in detail.

Show it

Figure 1 is a partial insight into the lower part of an open inventive

Installation switching device in the off position,

Figure 2 is a partial insight into the lower part of an open inventive

Installation switching device in the position in which the means blocks the movable contact lever, a partial insight into the lower part of an open installation switching device according to the invention in the position in which the switch knob comes into operative connection with the means, a partial insight into the lower part of an open installation switching device according to the invention in the position in which the means by the handle in his A view of a means for temporarily holding the movable contact lever according to the invention, an insight into the upper part of an open installation switching device according to the invention with a means according to the invention for temporarily holding the movable contact piece, an enlarged partial view of a section of Fig. 6, a Insight into the upper part of an open service switching device according to the invention with a means according to the invention for temporarily holding the movable contact piece inserted therein, in a further embodiment An insight into the upper part of an open inventive service switching device with a means according to the invention for temporarily holding the movable contact piece inserted therein, in yet another Embodiment, a partial view of the lower part of an open inventive service switching device having a means according to the embodiment of Fig. 10,

In the figures, identical or equivalent components or elements are designated by the same reference numerals. FIG. 1 shows a partial view into the lower part of an open service switching device 1 according to the invention. An installation switching device 1, here a circuit breaker, is often constructed in the so-called shell construction, as here too. It has a housing, which is composed of two housing half-shells, which are assembled at a circumferential joining edge. The one housing half shell is referred to as lower part 101, the other is referred to as upper part. In the lower part 101, most elements, parts and assemblies of the line circuit breaker are used. The circuit breaker shown in Figures 1 to 4 substantially corresponds to that which is described in DE 10 2008 006 863 A1. DE 10 2008 006 863 A1 should therefore be included in the disclosure content of the present invention with respect to the structure and operation of the circuit breaker 1, and with respect to the structure and operation of the switching mechanism of this circuit breaker. In the further description of this invention will therefore not be discussed in more detail on the rear derailleur, or only insofar as it is necessary to explain the subject of the present invention.

Of course, however, the present invention is not limited to use with a derailleur as shown in DE 10 2008 006 863 A1, but rather applicable to all conceivable types of derailleurs in all conceivable types of service switching devices. In the illustration of Fig. 1, the contact point of the circuit breaker is opened. The contact lever 2 with the movable contact piece 6 is pivoted clockwise away from the fixed contact 7. Between the fixed and the movable contact piece 6, 7 is an air gap, it can not flow. The switch knob 5 is located in the left-facing switch-off position. The contact lever comprises three components. First, there is a contact carrier, which is pivotally mounted and which establishes the operative connection to the tab 3 and the rest of the rear derailleur. At the free end of the contact carrier a contact horn is attached. At the contact horn, the movable contact piece 6 is formed near its free end. The contact carrier, contact horn and contact piece can consist of different materials, each of which is optimally adapted to the specific function. Thus, the contact piece made of particularly conductive, but also abrasion and erosion resistant material. If at the contact horn a movable Stranded wire is welded, which continues the current path into the device, so it is advantageous if the contact horn is made of particularly good conductive material.

It can be seen in Fig. 1, the latch lever 103, the release lever 104, the tab 3 and the coupling element 4 in the form of a bracket. Between the pawl lever 103 and the release lever 104, the latching point is formed, as explained in more detail in DE 10 2008 006 863 A1, which is latched in the position shown in FIG. The switching knob 5 has an extension 8, which is arranged opposite the switching handle 51. The extension 8 is connected via the coupling element 4 with the tab 3. New compared to the rear derailleur shown in DE 10 2008 006 863 A1 is the means 10 for holding the contact lever 2. This means 10 is shown in FIG. 5 as a single part. It basically comprises three parts. The first part is a slide 12, which is connected via the second part, a dome part 13 with the third part, the adjusting lever 14. Overall, the means 10 has approximately a T-shape, wherein the slide 12 and the coupling part 13 form the longitudinal beam of the T and the adjusting lever 14, the short crosspiece.

The dome part 13 is designed in the form of a web which connects the slider base body 16 with the adjusting lever 14 in the manner of a bendable hinge. The dome part 13 makes it possible to pivot the slider base body and the adjusting lever 14 in a plane against each other. The means 10 may be made in a preferred embodiment as an injection molded part made of plastic.

The means 10 is installed in the service switching device 1 so that the slide 12 and the dome part 13 extend approximately perpendicular to the front side 105 of the housing, and the adjusting lever 14 extends approximately parallel to the front side 105. The means 10 is thereby held displaceably in the upper part of the housing, the second housing half shell, see FIGS. 6 and 7. In the illustration of FIG. 1, the means 10 is shown in the position in which it is located with the upper housing part attached, wherein the upper housing part itself is not shown.

The slide 12 has a slider body 16 with a slot 17. With the slot 17 of the slider 12 on a guide sleeve 18 in the half-shell of Housing top 102, see Figs. 6 and 7, held displaceably. The guide sleeve 18 has to lateral locking lugs with which the slide body 16 is locked captive, with the slide can be moved perpendicular to the front side 105 of the housing. Another function of the latching is to avoid that the means 10 with one of its parts falls inside the device and there with the

Impact lever 109 comes into contact so that its movement is not affected or even blocked in the event of triggering.

The housing-fixed axis (19) is located with respect to a fixed by the direction of displacement of the slider displacement line on the same side as the contact lever (2). The guide sleeve 18 has a central opening. This assumes, when the upper part 102 is placed on the lower part 101, the extension of a first fixed housing axis 108 which is fixed to the housing lower part 101. The first housing-fixed axis 108 is at the same time the axis of rotation for a hammer 109, which - as described in DE 10 2008 006 863 A1, the movement of both a thermal and a

15 magnetic trigger member transmits to the trigger 104.

The adjusting lever 14 has an arm 20 and at the first free end of a retaining lug 110. So he is on a second housing fixed axis 19 which is fixed in the upper housing part 102, see FIG. 6, pivotally mounted. At the holding lug 110 opposite the second free end of the arm 20 is bent upward so that 0 on its side facing the slide body 16 side a curved cam surface 21 is formed, whose function below in connection with the interaction between the switch knob 5 and the means 10 will be explained.

At the side facing away from the adjusting lever 14, a holding extension 15 is integrally formed on the slider base body 16. He has approximately an L-shape, the long leg in extension 5 of the dome part 13 facing downward, and the short leg is perpendicular to the spanned by the slider body 16 plane and thus in the assembled state of the inner surface of the housing upper part on the Inner surface of the housing base 101 points out.

The means 10 is inserted into the upper housing part 102 so that it is under a certain bias, whose direction of action is perpendicular to the front side 105 directed downwards. This starting position of the means 10 is also referred to as a holding position. This is in the holding position of the means 10 of the holding extension 15 in the path of movement of the contact lever 2, and the holding extension 15 is thereby able to temporarily hold the movable contact lever 2. Let us now consider Figure 2. This shows a state in which the switch knob 5 has been pivoted a piece in the clockwise direction in the direction of the closed position. When latched Verklinkungsstelle the derailleur, the tab 3, driven by the coupling element 4, acts on the free end of the contact lever 2, which is formed here by a contact carrier, and begins to pivot it in the direction of its closed position counterclockwise. The contact lever strikes the holding extension 15, and this prevents the contact lever, continue to move towards the fixed contact piece 7 back. In this blocked position, the distance between the fixed and the movable contact piece 7, 6 is so large that no arc between the two contact pieces can form. The contact point of the holding extension 15) on the contact lever 2 is formed on the contact horn near the movable contact piece 6.

On the extension 8 of the switch knob 5 is an active surface 11, which is an active connecting means to couple the switch knob with the means 10. In the switch-off position according to FIG. 1, the active surface 11 is far away from the cam surface 21 of the means 10. In the blocked position according to FIG. 2, the active surface 11 of the cam surface 21 has approached by pivoting the switch knob 5.

When the switching knob 5 is pivoted further from the position of FIG. 2 in the clockwise direction, the active surface 11 strikes the cam surface 21. This position is shown in FIG. Upon further pivoting of the switch knob clockwise to the closed position pushes the switch knob 5 via its active surface, the lever 14 due to the operative connection with the cam surface 21 counterclockwise upwards. As a result, the slide 12 is moved to the holding extension 15 upwards, it is effectively pulled up by the adjusting lever 14, guided in the slot 17. The slide arrives in its release position in which the holding extension is moved so far up that he Movement path of the contact lever 2 suddenly releases. The contact lever 2 then snaps very fast, driven by the contact pressure spring 111, in its closed position, in which rest the movable contact piece on the fixed contact piece and the contact point is closed. Closing the contact point happens so fast that no arc can occur.

The pivoting of the control lever 14 upwards takes place counter to the restoring force of the aforementioned bias of the means 10. When the contact lever 2 when turning off the circuit breaker 1 again in a clockwise direction in its Ausschaltlage, see Fig. 1, is pivoted by the switch knob. 5 is pivoted counterclockwise again, so the extension 8 of the switch knob releases the cam surface 21 again and it moves due to the assembly under bias of the slider 12 back down to its holding position. He is then ready for temporary blocking of the contact lever when switching on again. Figures 8 and 9 show a further embodiment of the invention. Here, the adjusting lever 14 has a second arm 112, which is formed in extension of the arm 20 on the opposite side of the retaining lug 110. The second arm 112 is supported on a projection 113 on the inner wall of the housing top 102 and thereby causes the bias of the means 10. Another difference from the embodiment according to the figures 1 to 7 is that the slide body 16 'as a plate is trained. In order not to come into contact with the hammer, the plate of the slide body 16 'is supported on the guide sleeve 114, which receives the first housing-fixed axis, the aforementioned Schlaghebelachse. Another support is achieved in that the cam surface 21 is supported on an edge 115 on the switch knob 5.

In a further embodiment, not illustrated separately here, a leaf spring can be mounted in the housing for producing the bias of the means 10, which presses the means 10 down. For example, in the embodiment of FIGS. 8 and 9, the leaf spring could rest against the second arm 112. A further embodiment is shown in FIGS. 10 and 11. This differs from that of FIGS. 8 and 9 in that the slide body 16 "is connected to a elongated plate has become, which is based on the guide on a web 116 on the inside of the housing base 101. The holding extension 15 "is formed so long that it causes a support of the means 10 against the inner surface of the housing upper part, which is a second measure to avoid that the means 10" comes into contact with the hammer 109. Also present in the embodiment of FIGS. 10 and 11 is the support of the cam surface 21 on an edge of the switch knob.

For mounting an installation switching device according to the invention, the modules and components are inserted into the housing base, the means 10 is inserted into the housing upper part, and housing lower and - upper part are assembled. There is only one more component required to realize the jump function of the derailleur. The assembly is very simple and suitable to be performed by a production machine at high speed, because the means 10 is inserted only in the upper housing part in the appropriate place.

In a further embodiment, which is not shown here by a figure, the means 10 can also be mounted in the housing lower part. It would have a similar shape as shown in Figures 8 to 11, with the difference that the holding projection facing away from the top of the inside of the housing base. In the assembly, the means 10 would be used here as one of the first components in the lower housing part, which again can be done fully automatically at high speed, and then come then the other components and assemblies to do so.

LIST OF REFERENCE NUMBERS

1 Electrical service switching device

2 contact levers

3 tab

4 coupling element

5 switching knob

6 Movable contact piece

7 Fixed contact piece

8 extension

10 means for holding the contact lever

10 'Means for holding the contact lever

10 "Means for holding the contact lever

11 active compound, effective area

12 slides

13 dome part

14 levers

15 holding extension

15 'holding process

15 "holding extension

17 slot

18 guide sleeve

19 Second housing-fixed axis

20 arm

21 cam surface

101 housing base

102 housing upper part

103 latch lever

104 release lever

105 front

106 latch

107 Central opening

108 First fixed axle

109 impact lever

110 eyelet

111 Contact pressure spring

112 Second arm of the control lever

113 advantage

114 guide sleeve

115 edge

116 footbridge

Claims

claims

Electrical service switching device (1) with a switching mechanism with Verklinkungsstelle, with a contact lever (2) which is connected via a tab (3) and a coupling element (4) with a switch knob (5), wherein when pivoting the switch knob (5) in the switch-on direction of the contact lever (2) via the coupling element (4) and the tab (3) is spent at latched Verklinkungsstelle in closed position, wherein a means (10) for temporarily holding the movable contact lever (2) is provided during the switch-on,

characterized in that between the switch knob (5) and the means

(10) an operative connection means (11) is provided to bring the further movement of the switch knob (5) the means (10) in a release position in which the contact lever (2) is released, so that a sudden impact of the contact lever attached, movable contact piece (6) on the fixed contact piece (7) is effected.

Electrical service switching device (1) according to claim 1, characterized in that the operative connection means (11) is an engagement surface on an extension (8) of the switch knob (5).

Electrical service switching device (1) according to claim 1, characterized in that the means (10) comprises a slide (12) which is connected via a coupling part (13) with a control lever (14), wherein the operative connection means

(11) acts on the adjusting lever (14) to bring the slider (12) in the release position.

Electrical service switching device (1) according to claim 3, characterized in that the slide has a holding extension (15) to temporarily hold the movable contact lever (2).

Electrical service switching device (1) according to claim 4, characterized in that the contact lever (2) comprises a pivotally mounted contact carrier on which a contact horn is fixed, and in that on the contact horn, the movable contact piece (6) is formed, wherein the contact point of the holding ¹ Fortsatzes (15) on the contact lever (2) on the contact horn near the movable contact piece (6) is formed.

6. Electrical service switching device (1) according to claim 3, characterized in that the slide (12) comprises a slide body (16), with a slot (17) to the slider (12) on a guide sleeve (18) in the housing of the service switching device (1) to keep longitudinally displaceable.

7. Electrical service switching device (1) according to claim 3, characterized in that the adjusting lever (14) on a housing-fixed axis (19) is pivotally mounted, and that an arm (20) of the actuating lever with the dome part (13) is connected, and said arm (20) carrying at its free end a camming surface (21) for cooperating with said operative connection means (11) via said camming surface (21).

8. Electrical service switching device (1) according to claim 6, characterized in that the housing-fixed axis (19) with respect to a fixed by the direction of displacement of the slider displacement line on the same side as the contact lever (2).

9. Electrical service switching device (1) according to claim 3, characterized in that the dome part (13) is designed as a bendable hinge.

10. Electrical service switching device (1) according to claim 3, characterized in that a spring element is provided which biases the actuating lever (14) against the release position of the means (10) resiliently.

11. Electrical service switching device (1) according to claim 3, characterized in that the means (10) is designed as a one-piece injection-molded part made of plastic.