EP1728260A1 - Switch mechanism for an electrical installation switch device - Google Patents
Switch mechanism for an electrical installation switch deviceInfo
- Publication number
- EP1728260A1 EP1728260A1 EP05707738A EP05707738A EP1728260A1 EP 1728260 A1 EP1728260 A1 EP 1728260A1 EP 05707738 A EP05707738 A EP 05707738A EP 05707738 A EP05707738 A EP 05707738A EP 1728260 A1 EP1728260 A1 EP 1728260A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- arm
- bracket
- switch
- tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
Definitions
- the invention relates to a switching mechanism for an electrical installation switching device, according to the preamble of claim 1.
- a circuit breaker which is to be considered here by way of example, has a contact point consisting of a fixed and a so-called movable contact piece, which can be closed or opened manually or automatically.
- the movable contact piece is usually fastened to a contact lever which can be rotated about a fixed axis, at the other end of which a toggle lever mechanism connects, which itself is in turn articulated to the shift knob.
- the opening of the contact point is effected on the one hand by actuating the switching knob, and on the other hand a thermal release with which an overcurrent and an electromagnetic release with which a short-circuit current can be switched off are provided.
- the circuit breaker S2 sold by ABB Stotz-Kontakt GmbH, Heidelberg, has a gear mechanism with a latching point, which is arranged between two circuit boards; A thermal release in the form of a thermal bimetal acts on this latching point on the one hand and an electromagnetic trigger on the other hand, so that after this latching point has been unlatched, the movable contact piece is permanently moved to the open position.
- the arrangement of the switch lock between the two boards has the advantage that the switch lock can be preassembled with the boards and the contact lever as well as with the switch toggle which is rotatably fixed between the two boards.
- Such a switch lock can be simplified in that a toggle lever mechanism is provided between the contact lever and the switch toggle, which is formed from two parts which can be pivoted relative to one another and which, when switched on, assume a first stable position together with the switch toggle and the movable contact lever, which of the trigger is brought into a second stable position via a dead center position, the contact lever and thus the movable contact piece being in the open position in the second stable position.
- Such a rear derailleur of the type mentioned at the outset is known from EP 0 585 261 B1, in which the toggle lever mechanism is formed from a stretching lever and a round wire bracket, the stretching lever connecting to the shifting knob; Due to the point of application of the trigger or, if applicable, a trigger lever on the stretching lever, a particularly high dimensional accuracy is important in order to achieve correct triggering, whereby additional measures must be taken to achieve a precisely defined guidance of all components on the knee joint lever for the switch-on process.
- the object of the invention is to further simplify a switching mechanism of the type mentioned at the outset, so that the manufacture and, moreover, the assembly are simplified.
- the contact point in a line circuit breaker or residual current circuit breaker is formed from a fixed and a movable contact piece, the movable contact piece being fastened to a pivotably mounted contact lever.
- the invention can of course also be applied to such switching devices, in particular motor protection switches, in which a double contact point with two spaced-apart fixed contact pieces and a contact bridge, to which two movable contact pieces are attached, is formed; the transmission can then be arranged between the shift knob on the one hand and the contact bridge on the other.
- the double contact point is then also a "contact point" in the above sense.
- the toggle lever mechanism comprises a tab articulated to the movable contact piece (single contact or double contact) of the contact point and a bracket having two legs, of which one leg of the bracket with the other end of the tab and the other leg of the bracket with the switching knob are connected in an articulated manner, the release lever acting approximately perpendicular to the toggle lever mechanism in the region of the knee joint point in the direction of the second stable position in the event of release.
- the release lever is rotatable about the axis of rotation of the shift knob; it is coupled to the trigger with a first arm and acts on the articulated gear with a second arm.
- the first arm is approximately perpendicular to the second arm.
- a projection extending transversely thereto and in the direction of the free end of the legs of the bracket is provided on the tab in the region of the articulation point of the bracket, against which the second arm of the trigger strikes when triggered and so relocated the knee joint transmission from the first stable position to the overpressure point position.
- the tab may have an L-shape, the longer leg of which is coupled to the bracket and the Konaktstelle and the shorter leg carries the projection.
- the legs of the bracket are free from the path of the second arm of the release lever, so that the second arm can reach the projection over the free ends of the legs of the bracket without being obstructed by the legs of the bracket.
- the leg of the bracket, which is coupled to the bracket protrudes into the path of movement of the release lever, so that the toggle lever mechanism is not loaded via the bracket, but via the bracket.
- the movable contact piece is attached to a pivotably movably mounted contact lever, which is a double arm lever, one arm of which is connected to the bracket and the other arm of which the movable contact piece is fastened.
- a spring force acts in the area between the bearing point of the contact lever and the articulation point of the tab, which acts on the contact lever in the direction of the first stable position of the transmission.
- the transmission In its first stable position, the transmission runs approximately parallel to the front wall of the switching device.
- a stop surface is preferably provided on the tab, with which the tab rests against the leg of the bracket connected to the shift knob.
- FIG. 1 is a partial view of an electrical circuit breaker, partially shown, essentially in the area of the switching mechanism,
- FIG. 2 is a view of the rear derailleur of FIG. 1 in the same position and the same view as in Fig. 1 without a shift handle
- 3 is a view of the rear derailleur, based on the representation of FIG. 1 on the back in a switching position
- FIGS. 3 and 4 shows a further embodiment of the invention, seen on the side shown in FIGS. 3 and 4, in a perspective view
- Fig. 7 is a side view of the embodiment of FIG. 6 and
- Fig. 8 shows a third embodiment of the invention.
- FIG. 1 shows an insight into a part of a circuit breaker 10, the individual components being located inside a shell-shaped housing lower part 11, which is supplemented to form an overall housing with a correspondingly designed, shell-shaped housing part.
- the housing structure corresponds to the housing structure of the circuit breaker S2 from ABB Stotz-Kontakt GmbH, Heidelberg.
- a front side 12 to which a front narrow side surface 13 and 14 connect on both sides, which each merge into a rear front side 15 and 16, to which (not shown in more detail) each connect a rear narrow side wall, which faces downwards in Area of the dashed line 17 on the fastening side are closed by a fastening wall with which the circuit breaker 10 can be fastened (snapped) to a mounting rail (not shown).
- a switch toggle 18 is rotatably mounted about a fixed axis 19, the switch toggle 18 having the actual handle 20 and approximately diametrically opposite an eye 21.
- the switching handle 20 projects outwards through an opening 22 in the front wall, whereas the eye 21 is located inside the housing of the switching device.
- the longitudinal axis of the Switch handle 20 and the connection of the center of the axis 19 with the center of the eye 21 includes an obtuse angle open to the contact point.
- the distance between the eye 21 and the obtuse angle depend on the dimensions of the components described below.
- the contact lever 27 is a double arm lever which is pivotable about an axis 40 (see below), the tab 26 being articulated on one arm 27a and the movable contact piece 28 being fastened on the other arm 27b.
- a slide 31 is displaceable approximately parallel to the front front wall 12, on which a thermobimetal, not shown, acts as a thermal trigger for overcurrents and, via a transmission lever, a magnetic trigger for short-circuit triggering, which can trigger the switch in the manner shown below.
- FIG. 3 in which the switching mechanism with switching handle 20, bracket 24 and tab 26 are shown on the back; One looks at the end faces of the legs 23 and 25, recognizes the axis 30 and the contact lever 27 and the slide 31.
- the tab has an extension 39, see below, which projects in the direction of the axis of rotation 19 of the switch knob 18 when the switch is in the switch-on position.
- this extension 39 ie on the tab 26
- there is a contact surface 32 which rests on the bracket 23, so that the bracket 23 is held by the tab.
- the tab also cannot twist around the bracket 23 because, in the opposite manner, the tab abuts the bracket 23 over the surface 32 and is supported on the bracket 23.
- the contact surface helps to keep the toggle lever gear in its first stable position (switch-on position).
- a release lever 33 Mounted about the axis 19 of the switching knob 18 is a release lever 33, which has a first release arm 34 and an approximately perpendicular second release arm 35 and an extension 36 which is approximately perpendicular to the second arm 35 and in an opposite direction to the arm 34 protruding direction with which the trigger lever 33 is rotatably mounted about the axis 19 of the shift knob 18.
- the first arm runs across, i.e. H. approximately perpendicular to the toggle lever mechanism in the switched-on position and approximately perpendicular to the slide 31, so that the slide 31 can rotate the release lever 34 when moved in the direction of arrow P.
- the tab 26 is approximately triangular in shape with a longer leg 37 and a shorter leg 38; On the shorter leg 38, as can be seen from FIG. 2, a type of blade, as an extension 39, is formed, which projects beyond the articulation point 25 in the opposite direction to the articulation point 30, the contact surface 32 being integrally formed on this extension 39. In the first stable position shown in FIG. 1, the extension projects beyond the bracket 24.
- the contact lever 27 is rotatably mounted about a fixed axis 40 which extends through an elongated hole 41 on the contact lever 27.
- the force 42 of a compression spring (not shown) is applied to the contact lever in a clockwise direction about the axis 40, in the embodiment according to FIG. 2.
- the elongated hole 41 is oriented such that the contact lever 27 can move freely relative to the axis 40. If the switch according to FIG.
- the eye 21 presses the bracket 24 and the tab 26 clockwise around the axis 19, the contact lever 27 pivoting about the axis 40.
- the force of the spring 42 acts as a contact pressure spring and tries to press the contact lever 27 about the axis 30 against the fixed contact piece 29.
- the slide moves in the direction of arrow P and thus acts on the release lever 33, clockwise U in the illustration according to FIG. 3 (see arrow U) and counterclockwise around the bearing point 19 in the illustration according to FIG. 1.
- the arm 35 of the release lever strikes against a projection 43 on the tab 26, which projection 43 is formed approximately at the free end of the leg 38 on the tab and projects perpendicularly to the plane of the drawing toward the viewer the representation of FIG. 3; by impacting the trigger arm 35 provided here with a head 35a on the projection 43 transversely to the toggle lever mechanism, the axis 25 or the leg 25 is moved from its first stable position to a dead center position, i.e.
- FIG. 4 shows the position in which the leg 25 has exceeded the dead center position.
- FIG. 5 shows the release or switch-off position in which the bracket 24 assumes a position in which the two legs 23 and 25 span a plane which extends approximately perpendicular to the longitudinal extension of the tab 26.
- the switch is also in a so-called free release position, namely in a position in which the switch is prevented from being switched on due to the position of the slide 31 and the release lever 33.
- the leg 25, like the leg 23, ends in the plane on which the projection 43 is formed, so that the leg 23 can bear against the contact surface 32, but the leg 25, however, the arm 35 of the trigger lever 33 as well as the leg 23 can not hinder its movement.
- the release lever which is designated here by the reference number 60, is modified with respect to the release lever 33 insofar as the first arm 61 corresponds to the first arm 34, but on the other hand the second arm 62 has an extension 63 which forms a Z-shape with the second arm 62, the free leg 64 of this Z-shape runs approximately parallel to the arm 62.
- a bracket 65 is provided, the legs 66 and 67 overlaps the plane 68 of the tab 69 corresponding to the tab 26 and protrudes into the path of movement of the second arm 62 or of the free leg 64, so that when a release is carried out, the second arm 64 does not hit a projection on the tab 68 , but the part of the bracket 67; otherwise the triggering process is the same as in the embodiment according to FIGS. 1 to 5.
- FIG. 7 shows the embodiment, which can be seen in perspective view in FIG. 6, in the direction of arrow VII.
- the arm 62 and the free leg 64 and the leg 67 of the bracket 65 can be seen.
- a helical spring 70 is inserted, at the ends of which tangentially or radially projecting arms are arranged, only the arm 71 being shown, which is held in a recess 72 of the switching knob 18 ; the other arm, not shown, acts on the release lever in the direction ready for release, that is clockwise in the representation of FIG. 1, so that the spring is always biased. It pushes the shift knob or handle 20 into the off position.
- the second arm 34 of the release lever 33 has a projection 26a running in the direction of the axis of rotation 19, which overlaps the end edge 39a of the extension 39 and is pressed by the spring 70 against the end edge 34a. This ensures that the tab 26 is held firmly and cannot deflect, so that the toggle lever mechanism 24/26 can be moved into the first stable position shown in FIG. 1 when it is switched on and then the contact lever 27 can be brought into the switched-on position.
- the axis of rotation about which the contact lever 27 rotates is an axis 40 which is accommodated in a stationary manner in the housing; in the embodiment according to FIG. 8, the contact lever 27 is about an axis of rotation 80 pivotable, which is guided in a slot-like recess 81 made in the housing.
- the depression 81 runs in the direction of the displacement movement of the pin 80 when it is switched on.
- the switch triggers because the slide 31 is displaced in the direction of arrow P, for example due to the action of a thermobimetal or an electromagnetic release, then, as already described above, the release lever 33 is pivoted in the direction of arrow U, as can be seen from FIGS. 3 and 4 , The switch toggle 18 is still in the on position. When triggered again, the switch toggle switches to the off position.
- Fig. 1 shows a circuit breaker in which the contact lever is formed in two parts.
- a contact lever part 91 which is made of copper, is fastened to a support element 90, which is connected to the toggle lever mechanism in an articulated manner and which consists of insulating material.
- the contact lever is stamped in one piece from copper;
- the shift lever can be designed in the form of a U-shaped bent part which is made of copper or, at lower current levels, of steel.
- the bearing point is in the same places, so that the bearing pin runs across the legs of the U-shape.
- the movable contact piece is attached to the outside of the web of the U-shape.
- FIG. 2 in which the toggle joint is in its first stable position, unites the connecting line between the articulation point 30 and the center of the leg 25 with the connecting line of the legs 25 and 23 forms an acute angle; the line between points 25 and 30 has the reference number S1 and the line between the center points of the legs has the number S2.
- An obtuse angle ct ⁇ is included between the two, which is open in the direction of the contact point.
- the angle ⁇ becomes zero, and with further movement of the release lever 33, an angle ⁇ 2 is formed which is open towards the front, that is in the opposite direction to the angle ⁇ i and then decreases until S2 runs approximately perpendicular to line S1.
- the dead center line is designated T, see FIG. 2.
- the center point of the leg 25 is closer to the front side, and after triggering, the center point of the leg 25 moves relative to the dead center line in the direction of the fastening side of the switching device.
- the movement of the toggle mechanism is a sudden snap movement when the dead center line T is overlapped.
Landscapes
- Breakers (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Keying Circuit Devices (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Ticket-Dispensing Machines (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004012919A DE102004012919A1 (en) | 2004-03-17 | 2004-03-17 | Rear derailleur for an electrical service switching device |
PCT/EP2005/002737 WO2005091323A1 (en) | 2004-03-17 | 2005-03-15 | Switch mechanism for an electrical installation switch device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1728260A1 true EP1728260A1 (en) | 2006-12-06 |
EP1728260B1 EP1728260B1 (en) | 2009-03-04 |
Family
ID=34961219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05707738A Not-in-force EP1728260B1 (en) | 2004-03-17 | 2005-03-15 | Switch mechanism for an electrical installation switch device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1728260B1 (en) |
CN (1) | CN1934670A (en) |
AT (1) | ATE424619T1 (en) |
DE (2) | DE102004012919A1 (en) |
WO (1) | WO2005091323A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004055565A1 (en) * | 2004-11-18 | 2006-05-24 | Abb Patent Gmbh | Service switching device |
DE102004055564B4 (en) | 2004-11-18 | 2022-05-05 | Abb Ag | Electrical installation switching device |
DE102005029059A1 (en) * | 2005-06-23 | 2006-12-28 | Abb Patent Gmbh | Switching device e.g. circuit breaker has means for temporarily retaining moveable contact lever, which are released when the contact lever is moved further and contact lever attached to it strikes the fixed contact element |
DE102009053012A1 (en) * | 2009-11-16 | 2011-05-19 | Abb Ag | Electrical service switching device |
DE102011008831A1 (en) * | 2011-01-19 | 2012-07-19 | Abb Ag | Istallationsschaltgerät |
DE102011008832A1 (en) * | 2011-01-19 | 2012-07-19 | Abb Ag | Service switching device |
DE102011008829B4 (en) * | 2011-01-19 | 2012-08-09 | Abb Ag | Service switching device |
DE102019209747B3 (en) | 2019-07-03 | 2020-10-08 | Ellenberger & Poensgen Gmbh | Circuit breaker |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1049484B (en) * | 1959-01-29 | |||
DE589921C (en) * | 1933-12-19 | Wilhelm Leyhausen | Electromagnetic overcurrent switch with knee joint contact | |
DE500098C (en) * | 1926-10-09 | 1930-06-18 | Wilhelm Leyhausen | Electromagnetic overcurrent switch with toggle lever contact device |
DE2336222A1 (en) * | 1973-07-17 | 1975-01-30 | Baco Const Elect | Automatic switching mechanism with free trip and forced break - uses only one spring for contact pressure between moving and fixed contacts |
DE4116454A1 (en) * | 1991-05-18 | 1992-11-19 | Licentia Gmbh | MECHANISM FOR A SELF-SWITCH |
-
2004
- 2004-03-17 DE DE102004012919A patent/DE102004012919A1/en not_active Withdrawn
-
2005
- 2005-03-15 DE DE502005006748T patent/DE502005006748D1/en active Active
- 2005-03-15 WO PCT/EP2005/002737 patent/WO2005091323A1/en not_active Application Discontinuation
- 2005-03-15 EP EP05707738A patent/EP1728260B1/en not_active Not-in-force
- 2005-03-15 AT AT05707738T patent/ATE424619T1/en not_active IP Right Cessation
- 2005-03-15 CN CNA2005800087625A patent/CN1934670A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2005091323A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502005006748D1 (en) | 2009-04-16 |
WO2005091323A1 (en) | 2005-09-29 |
EP1728260B1 (en) | 2009-03-04 |
CN1934670A (en) | 2007-03-21 |
DE102004012919A1 (en) | 2005-10-20 |
ATE424619T1 (en) | 2009-03-15 |
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