EP3625813B1 - Kontaktanpressanordnung - Google Patents

Kontaktanpressanordnung Download PDF

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Publication number
EP3625813B1
EP3625813B1 EP18734462.7A EP18734462A EP3625813B1 EP 3625813 B1 EP3625813 B1 EP 3625813B1 EP 18734462 A EP18734462 A EP 18734462A EP 3625813 B1 EP3625813 B1 EP 3625813B1
Authority
EP
European Patent Office
Prior art keywords
stop
spring element
contact
switching
assembly
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.)
Active
Application number
EP18734462.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3625813A1 (de
Inventor
Anne Schmidt
Ai Guang ZHAO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP3625813A1 publication Critical patent/EP3625813A1/de
Application granted granted Critical
Publication of EP3625813B1 publication Critical patent/EP3625813B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/502—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position the action of the contact pressure spring becoming active only after engagement of the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/48—Driving mechanisms, i.e. for transmitting driving force to the contacts using lost-motion device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H2033/6667—Details concerning lever type driving rod arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/01—Spiral spring

Definitions

  • the invention relates to a contact pressure arrangement for a switching contact piece of an electrical switching device, having a first stop and a second stop, between which a spring element extends, the first stop being movable relative to the second stop, the second stop forming an abutment for the first stop and at least one of the stops provides a pivot bearing for the spring element.
  • Such a contact pressure arrangement is, for example, from the utility model CN 2386525 Y known.
  • the contact pressure arrangement there is provided for a switching contact piece of an electrical switching device.
  • a spring element extends between a first stop and a second stop. The first stop can be moved relative to the second stop, with the second stop forming an abutment for the first stop. Provision is also made to provide a stop with a rotary bearing.
  • the known contact pressure arrangement uses a complex axial ball bearing as a pivot bearing.
  • the known construction enables elements of the contact pressure arrangement to rotate smoothly relative to one another.
  • this ease of movement is caused by increased masses and an increased installation space compared to conventional contact pressing arrangements.
  • the disclosure document DE 10 2013 221 910 A1 an electrical switch can be removed.
  • the electrical switch has a fixed and a movable contact.
  • a contact pressure spring is described, which is arranged within a spring housing, the spring on a pot bottom of the pot-shaped Spring housing and a cover part of the spring housing is supported.
  • the European patent application EP 3 089 188 A1 a switching device with a housing can be removed.
  • a movable and a fixed contact are arranged in the housing.
  • An associated drive unit has a spring which is arranged between a drive-side receptacle and a contact-side receptacle. From the patent U.S. 8,30 9,872 B2 discloses an insulating drive rod having a contact pressing arrangement.
  • a spring element extends between a first stop and a second stop.
  • a spring plate is arranged between the spring element and the respective stop.
  • the object is achieved with a contact pressure arrangement of the type mentioned at the outset in that the pivot bearing can be moved together with the first stop and the abutment has a damping element for the first stop.
  • An electrical switching device has a switching contact piece which can be moved relative to another switching contact piece.
  • a current path can be established or disconnected by a relative movement of the switching contact pieces to one another.
  • a contact pressure arrangement is used, which secures the switching contact pieces in a position relative to one another.
  • the relative position to be secured can be a switched-on state of the electrical switching device.
  • the switching contact pieces touch each other and a current path is closed via the switching contact pieces.
  • the contact pressing arrangement causes a force to act on the switching contact pieces that can be moved relative to one another, so that the position of the switching contact pieces relative to one another is secured.
  • the contact pressing arrangement can preferably brace the switching contact pieces against one another and move them towards one another or press them against one another.
  • the contact pressing arrangement is, for example, part of a kinematic chain which enables the transmission of a movement for generating a relative movement of the switching contact pieces of the switching device to one another.
  • a spring element of the contact pressing arrangement is arranged between a first and a second stop, the stops being movable relative to one another.
  • a relative movement of the stops can be used to tension or apply force to the spring element, so that the energy thus introduced into the spring element is available to cause contact pressure on the switching contact pieces of the switching device, for example when the kinematic chain is at rest.
  • the spring element is tensioned, for example, by the stops approaching or moving away from one another.
  • the contact pressure arrangement itself as a moving part (transmission element) of the kinematic chain.
  • the contact pressing arrangement of a transmission of a movement, z. B. serve a linear movement.
  • the contact pressure arrangement can act as a so-called dead time element, which z. B. causes a delayed transmission of a movement within the kinematic chain due to an elastic deformability of the spring element.
  • the spring element can also have such a rigidity that only when an overstroke occurs, ie after the switching contact pieces of the switching device have come into contact with one another, further movement within the kinematic chain is no longer transmitted to the switching contact pieces. This also protects the kinematic chain from damage.
  • the contact pressing arrangement can advantageously be designed in such a way that the spring element acts only on one side. i.e. Particularly in the case of a translatory transmission of a movement by means of the contact pressure arrangement, an effective function of the spring element can occur during a movement in a first direction, with a direct transmission (rigid coupling) of the Movement can take place by means of the contact pressing arrangement.
  • Rotational forces can occur within the kinematic chain as a result of external forces (e.g. during a movement, assembly, etc.). This is disadvantageous since, for example, connecting elements such as bolts, cotter pins, etc., can shear off or be bent as a result. For example, screw connections can also be loosened over time by such torsional loads.
  • the pivot bearing can thus serve as a freewheel, for example to protect the spring element from transverse forces introduced from the outside. As a result, the spring effect of the spring element can be retained.
  • other forces can also be absorbed in the contact pressing arrangement, so that not only the spring element but also, for example, other elements such as screw connections, bolts, splints of the kinematic chain are protected.
  • a stop with the pivot bearing makes it possible to freewheel or release forces directly in the area of the spring element. through a common By moving the stop and the rotary bearing, rotary movements on the spring element can be decoupled, regardless of the loading state of the spring element.
  • By moving the first stop together with the pivot bearing the use of multiple pivot bearings can be dispensed with.
  • the installation space of a contact pressure arrangement according to the invention is thus reduced.
  • the mass of the contact pressure arrangement and thus the moving mass in the kinematic chain is reduced by dispensing with a further rotary bearing. Due to the movement of the pivot bearing together with the first stop, a rotary movement can be intercepted directly on the spring element or reduced in the pivot bearing. The spring element is thus protected from external forces.
  • the pivot bearing can advantageously be integrated into the first stop, so that no additional installation space is required to accommodate the pivot bearing on the first stop.
  • the pivot bearing can thus move, in particular relative to the second stop, it being possible for the first stop to have the pivot bearing.
  • the spring element can serve to secure the pivot bearing.
  • the first stop is guided by the second stop.
  • the second stop can serve to guide the first stop. This makes it possible to use the second stop as a reference base for a relative movement of the first stop and for a relative movement of the rotary bearing.
  • the second stop in the manner of a housing, z. B. as a hollow cylindrical housing, which in particular surrounds the spring element.
  • the second stop can act as a spring housing.
  • the first stop can be supported on the second stop or on the housing and can be guided by the second stop. This enables a defined linear relative movement between the first and second stops. Canting and tipping is avoided. For example, the first stop dive into the second stop.
  • the second stop is designed in the manner of a cylinder and the first stop in the manner of a piston, so that the first stop can dip into the second stop.
  • the spring element can be tensioned or released by a relative movement of the first and second stop.
  • the stops are axially movable relative to each other.
  • An axial mobility of the stops enables a linear movement in a simple manner in order to cause a tensioning or relaxation of a spring element.
  • the movement path of the relative movement of the first and second stops can be aligned coaxially, in particular congruently, with a movement which the contact pressing arrangement performs as part of an integration into a kinematic chain. This makes it possible in a simple manner to use the contact pressure arrangement on the one hand to transmit a movement and on the other hand to use the contact pressure arrangement to press a switching contact piece against a mating contact of an electrical switching device.
  • At least one of the stops can be formed and aligned coaxially to the movement axis.
  • the first stop has a rotatable disk, which is supported on the second stop.
  • a rotatable disk offers the possibility of providing a relative movement of the rotatable disk to other assemblies of the first stop, for example with respect to a support element.
  • a rotatable disk can, for example, be designed as a complete circular disk. However, it can also be provided that only a ring shape is used to rotate the disk to train. In addition, the disc can also be designed only in sections, so that, for example, only sectors of a circular disc are used.
  • the rotatable disc can be supported on the second stop with body sections on the casing side.
  • a sliding arrangement can advantageously be arranged there in order to reduce the frictional resistance between the rotatable disk and the second stop.
  • material in a bush-like manner for example, polytetrafluoroethylene strips or copper bushings can serve as sliding elements.
  • Force can be introduced from the spring element on the front side of the pane, so that the axis of movement of the first stop relative to the second stop and the introduction of force from the spring element are aligned essentially parallel to one another.
  • the spring element can preferably act directly or indirectly on the end face of the rotatable disk or be attached to the rotatable disk.
  • a further advantageous embodiment can provide that the rotatable disk is connected to a support element of the first stop via a loose fit.
  • a support element of the first stop serves to position the rotatable disk.
  • the rotatable disc can be placed on the support element or attached to the support element, so that a rotary movement of the rotatable disc relative to the support element is made possible.
  • the support element and the rotatable disk can be connected to one another via a clearance fit.
  • the loose fit can be secured by the force of the spring element, so that a removal or loosening of the rotatable disk and the support element is prevented by the spring element.
  • the spring element serves to secure the loose fit.
  • the clearance can cause an axial and radial guidance of the rotatable disk.
  • a further advantageous embodiment can provide that the first stop has a guide mandrel which is at least partially encompassed by the spring element.
  • the use of a guide mandrel on the first stop makes it possible to enable the spring element to be steered or guided beyond the function of the stop.
  • the spring element can, for example, at least partially encompass the guide mandrel, so that the spring element is secured on the guide mandrel and thus on the first stop. This makes it more difficult for the spring element to loosen or tilt.
  • the guide mandrel can ensure that the spring element rests securely on the rotatable disk.
  • the guide mandrel can be formed, for example, at least from parts of the rotatable disk. In particular when using a rotatable disk which has an annular shape, the central area of the disk can be used to form the guide mandrel.
  • the guide mandrel can, for. B. be formed from parts of the rotatable disk. However, the guide mandrel can also be formed at least partially from the support element.
  • the guide mandrel is guided by the second stop.
  • the guide mandrel directs and guides the spring element.
  • the position of the guide pin is secured by guiding the guide pin on the second stop.
  • the relative movement of the first stop and the second stop with respect to one another is also stabilized via the guide mandrel.
  • the spring element can be mounted or guided in an improved manner so that unwanted buckling or buckling of the spring element is made more difficult.
  • the first stop can be guided on the second stop by the support element and/or by the rotatable disk and/or on the guide mandrel.
  • a further advantageous embodiment can provide that the first stop and the second stop are guided in a telescoping manner.
  • the first stop and the second stop can be moved relative to one another. This movement can preferably be a linear relative movement.
  • the spring element extends between the stops.
  • telescoping stops By using telescoping stops, the relative movement of the first and second stops can be transmitted in an improved form.
  • telescoping i. H. a tilting of the stops in relation to one another is additionally prevented by the first and second stops collapsing into one another.
  • the first and the second stop are guided in a telescoping manner relative to one another at a number of points.
  • the second stop can surround the first stop in the manner of a housing, with the spring element being arranged inside the second stop.
  • the spring element in turn, can be covered by the first or second stop on the inner and outer casing side and finally guided.
  • a spring element with a compression stage can be constructed in a mechanically simple manner.
  • the spring element can be designed in the manner of a helical spring, with a force acting on the spring element when the first stop and the second stop approach one another and compression of the spring element causes charging or energy to be introduced into the spring element.
  • the abutment has a damping element for the first stop.
  • Movement of the first stop is limited by an abutment.
  • the abutment can preferably be made available by the second stop, with the use of a damping element on the abutment dampening a hard coupling of forces or impulses from the first stop into the second stop.
  • the damping element can be designed as an energy absorption element.
  • the damping element can be designed as a cup spring. Disc springs have a small stroke with high spring rates.
  • the abutment makes it possible to apply a prestress to the spring element. In this way, in particular, the loose fit can be secured.
  • a further object of the invention is to specify an electrical switching device which has a first and a second switching contact piece, the switching contact pieces being movable relative to one another.
  • the electrical contacting of the switching contact pieces should be mechanically and electrically stable. It is therefore the object of the invention to specify a shifting device which can carry out reliable shifting operations.
  • the object is achieved in an electrical switching device with a first switching contact piece and a second switching contact piece, which can be moved relative to one another, in that a kinematic chain, which is used to move the switching contact pieces relative to one another, has a contact pressure arrangement according to one of the above statements.
  • An electrical switching device is a device by means of which a current path can be interrupted or established.
  • relatively movable switching contact pieces are used, wherein at least one of the switching contact pieces is coupled to a kinematic chain to a To be able to cause relative movement between the switching contacts.
  • a relative movement is generated via the kinematic chain, it being possible for the contact pressing arrangement to be designed as part of the kinematic chain.
  • the contact pressure arrangement can thus on the one hand achieve sufficient contact pressure force of the switching contact pieces relative to one another, and on the other hand the contact pressure arrangement with a spring element arranged therein protects against mechanical overload, for example as a result of the switching contact pieces colliding bluntly.
  • the switching contact pieces can, for example, be arranged opposite one another at the ends and butt-butt against one another with their end faces in order to make contact.
  • the contact pressure arrangement secures the abutting switching contact pieces in a switched-on position of the electrical switching device.
  • a contact gap can advantageously be arranged between the switching contact pieces within a vacuum interrupter.
  • the presence of free charge carriers which would allow an electric current to be transmitted via the contact gap in the switched-off state, is ruled out.
  • the interior of the vacuum interrupter is hermetically sealed from the environment of the vacuum interrupter. A relative movement of the switching contact pieces to one another is generally transmitted through a wall of the vacuum interrupter.
  • the figure 1 shows an electrical switching device which has a vacuum interrupter 1.
  • the vacuum interrupter 1 has an electrically insulating main body.
  • the electrically insulating main body is designed as a hollow cylinder and is aligned rotationally symmetrically with respect to a main axis 2 .
  • the main body of the vacuum interrupter 1 is sealed off in a fluid-tight manner by electrically conductive sealing caps, so that a vacuum is hermetically enclosed inside the vacuum interrupter 1 .
  • the electrical switching device also has a first switching contact piece 3 and a second switching contact piece 4 .
  • the two switching contact pieces 3, 4 are constructed in the same way. They each have a contact stem and a contacting area.
  • the switching contact pieces 3, 4 are arranged opposite one another at the ends and are essentially aligned coaxially to the main axis 2, with the contacting regions of the switching contact pieces 3, 4 facing each other.
  • the first switching contact piece 3 is aligned in a stationary manner relative to the vacuum interrupter 1 .
  • the second switching contact piece 4 is aligned to be movable relative to the first switching contact piece 3 .
  • the contact stem of the first switching contact piece 3 is at a fixed angle in the associated end face Sealing cap of vacuum interrupter 1 inserted.
  • the second switching contact piece 4 or its stem passes through the other electrically conductive sealing cap of the vacuum interrupter 1.
  • a reversibly deformable, vacuum-tight bond between a front sealing cap and the second switching contact piece 4 is formed by means of a bellows 6.
  • the second switching contact piece 4 can be moved along the main axis 2 , it being possible to move relative to the vacuum interrupter 1 and relative to the first switching contact piece 3 .
  • the first switching contact piece 3 is connected to a phase conductor 7 at a fixed angle, so that the vacuum interrupter 1 is mechanically supported on the phase conductor 7 via the first switching contact piece 3 .
  • an electrically conductive connection is provided between the first switching contact piece 3 and the phase conductor 7 via the contacting with the phase conductor 7 .
  • the second switching contact piece 4 is electrically conductively connected to a further phase conductor 8 via a suitable connection.
  • a flexible electrically conductive connection between the second switching contact piece 4 and the additional phase conductor 8 is shown in the figure as an example. It can also be provided that other suitable contacts, such as sliding contacts, sliding contacts or the like, are used in order to electrically connect the movable second switching contact piece 4 to the other phase conductor 8 and in doing so not significantly impair the mobility of the second switching contact piece 4. Electrical contacting of the second switching contact piece 4 as well as the first switching contact piece 3 advantageously takes place outside of the vacuum interrupter 1 . An electrically conductive connection between the phase conductor 7 and the further phase conductor 8 can be produced or separated via the two switching contact pieces 3, 4.
  • a drive device 9 In order to be able to bring about a movement of the second switching contact piece 4, a drive device 9 is provided.
  • the drive device 9 can deliver a drive movement to to bring about a movement of the second switching contact piece 4 .
  • a kinematic chain 10 is used in order to transmit the movement in a suitable form, if necessary to transform it or to influence it.
  • the kinematic chain 10 extends from the drive device 9 to the second switching contact piece 4.
  • the kinematic chain 10 has various transmission elements.
  • a stationarily mounted two-armed deflection lever 11 is provided, which is connected to the drive device 10 with a first lever arm via a connecting rod 12 .
  • the deflection lever 11 is coupled to a connecting rod 13 with a second lever arm.
  • the push rod 13 has an electrically insulating section, so that the deflection lever 11 and the other elements of the kinematic chain 10 lying in the direction of the drive device 9 are electrically insulated from the second switching contact piece 4 .
  • the push rod 13 has, for example, a tube which is made of electrically insulating material, for example glass fiber reinforced plastic.
  • the push rod 13 is connected to a contact pressure arrangement 14 by its end facing away from the deflection lever 11 .
  • the contact pressure arrangement 14 is used to transmit a linear movement that can be coupled from the push rod 13 to the contact pressure arrangement 14 .
  • the contact pressing arrangement 14 is in turn connected to the second switching contact piece 4 so that a movement coupled in by the connecting rod 13 can be transmitted to the second switching contact piece 4 via the contact pressing arrangement 14 .
  • the contact pressing arrangement 14 has a first stop 15 and a second stop 16 .
  • the first stop 15 is connected to the push rod 13 .
  • a spring element 17 is arranged between the first stop 15 and the second stop 16 .
  • the spring element 17 is used to transmit a movement which emanates from the first stop 15 .
  • the first stop 15 is guided by the second stop 16 .
  • the first stop 15 is in the manner of a piston within a cylinder-like opening of the second stop 16 out.
  • the spring element 17 is guided under prestress between the two stops 15, 16, with the second stop 16 providing an abutment 18 for the first stop 15.
  • the abutment 18 enables the spring element 17 to be prestressed between the two stops 15 , 16 .
  • the first stop 15 can be moved relative to the second stop 16 , such a movement taking place under tension or relaxation of the spring element 17 .
  • a more detailed structure of the contact pressure arrangement 14 is exemplified in FIG figure 3 shown.
  • a drive force is transmitted from the drive device 9 to the kinematic chain 10 .
  • the connecting rod 12 controls the deflection lever 11 , whereupon this transfers a movement to the push rod 13 . Due to a rotatable coupling, overstrokes due to the rotary movements of the deflection lever on the connecting rod 12 or push rod 13 are compensated.
  • a movement is applied to the (preloaded) spring element 17 via the first stop 15 , as a result of which this moves the first stop 16 .
  • the second switching contact piece 4 is connected at a fixed angle to the first stop 16 , so that a movement is also transmitted to the second switching contact piece 4 .
  • the contacting area of the second switching contact piece 4 approaches the contacting area of the first switching contact piece 3 .
  • the switching path 5 is reduced in its extension along the main axis 2 . Movement of the second switching contact piece 4 as well as the contact pressure arrangement 14 essentially takes place in the direction of the main axis 2.
  • a current path between the phase conductor 7 and the further phase conductor 8 is closed.
  • an overtravel is carried out by the drive device 9 causes.
  • the second stop 16 Due to the rigid striking of the second switching contact piece 4 against the first switching contact piece 3, the second stop 16 is prevented from moving any further. By driving the drive device 9 further, the first stop 15 is driven further. Due to the fixing of the second stop 16, the spring element 17 is tensioned. After the spring element 17 has been sufficiently tensioned, the drive device 9 is switched off, as a result of which the position of the push rod 13 is fixed. The push rod 13 thus continues to press the first stop 15 with the interposition of the tensioned spring element 17 against the second stop 16 and thus the two switching contact pieces 3, 4 are pressed against one another. In the switched-on state, the contact pressure arrangement 14 ensures the relative position of the two switching contact pieces 3, 4 with respect to one another.
  • the switched-on state of the electrical switching device is in the figure 2 shown. In comparison to figure 1 it can be seen that the first stop 15 has moved away from the abutment 18, with the spring element 17 experiencing tension.
  • the contact pressing arrangement 14 has the second stop 16 .
  • the second stop 16 is designed in the manner of a cylinder, in which the first stop 16 is guided in an axially displaceable manner. A relative movement of the first and second stop 15, 16 takes place essentially along the main axis 2.
  • an abutment 18 for the first stop 15 is designed in such a way that an annular disk with the interposition of a plate spring 19 (damping element) forms a cylinder opening in the second stop 16 constricted.
  • the elastic design of the abutment 18 dampens the impact of the first stop 15 against the abutment 18 .
  • another consumption element can also be provided.
  • the first stop 15 is equipped with a support element 20 .
  • the support element 20 protrudes into the interior of the second stop, and on the other hand, the support element 20 protrudes through the cylinder opening of the second stop 16 and out of the second stop 16 .
  • the push rod 13 can be coupled directly or indirectly to the support element 20 via a rotary joint by means of a thread or a lug.
  • the support element 20 is designed essentially in the form of a bolt, with the bolt axis extending essentially coaxially with the main axis 2 .
  • the support element 20 is equipped with a collar 21 which extends radially around an outer surface of the bolt of the support element 20 .
  • the position of the collar 21 is chosen in such a way that it is encompassed by the second stop 16 .
  • this collar 21 can be used to strike the abutment 18, so that a release of the first stop 15 from the second stop 16 driven by the spring element 17 is prevented.
  • the support element 20 has a rotatable disk 22 on the end face.
  • the rotatable disk 22 is used for resting the spring element 17 on the first stop 15.
  • the rotatable disk 22 is rotatably mounted on the support element 20 relative to the main axis 2.
  • the rotatable disk 22 is designed in such a way that it covers the end face of the collar 21, which faces the spring element 17, and also covers the collar 21 on the casing side. Together with the surface with which the collar 21 comes into contact with the abutment, an aligned termination of the disk 22 is provided, so that both the collar 21 and the rotatable disk 22 come into contact with the abutment 18 .
  • the rotatable disc 22 On the shell side, the rotatable disc 22 is supported on the inside on a hollow cylinder recess of the second stop 16 and is guided in an axially movable manner.
  • a slide ring 23 is arranged on the circumference of the rotatable disk on the shell side.
  • the rotatable disk 22 is used for the contact of the spring element 17 , which presses the rotatable disk 22 against the abutment 18 by means of a pre-compression relative to the second stop 16 .
  • a loose fit is formed between the rotatable disk 22 and the support element 20 , as a result of which the rotatable disk 22 can be guided in a rotatable manner on the support element 20 in a cost-effective manner.
  • the rotatable disk 22 is equipped with a guide mandrel 24 centrally.
  • the guide mandrel 24 extends centrally within the cylinder recess of the second stop 16.
  • a part of the support element 20 also extends within the guide mandrel 24, as a result of which the guide mandrel 24 extends both through the rotatable disk 22 and through the support element 20 at least is formed in sections.
  • the spring element 17 is located in an annular gap between the outer lateral surface of the guide mandrel 24 and the inner lateral surface of the cylindrical recess of the second stop 16.
  • the spring element 17 is in the present case in the form of a helical spring, which is a so-called helical spring with pressure stage, i.e. a tension of the spring element 17 takes place with the windings approaching.
  • the guide mandrel 24 is provided with a frontal recess into which the second stop 16 protrudes with a section.
  • the first stop 15 and the second stop 16 are telescopically connected to one another, with a relative movement of the first stop 15 to the second stop 16 causing the stops 15, 16 to dip into one another.
  • a further sliding bush 25 is introduced into the recess of the guide mandrel 24 on the inner surface side.
  • a threaded rod 26 is arranged on the second stop 16 coaxially with the alignment of the support element 20 of the first stop 15 , by means of which the contact pressure arrangement 14 is connected at a fixed angle to the second switching contact piece 4 via the second stop 16 .
  • the pre-compression of the spring element 17 is selected in such a way that the spring element 17 presses the first stop 15 against the abutment 18, with the second stop 16 being the basis for the abutment 18 due to the mounting of the abutment Relative movement of the first stop 15 forms.
  • the spring element 17 ensures a rigid coupling of the two stops 15, 16 until contact is made between the two switching contact pieces 3, 4. Even in this state, rotary movements in the first stop 15 can be neutralized.
  • lateral forces can occur in the kinematic chain 10, which load the individual bearing points or deflection points.
  • a first stop 15 with a rotary bearing, rotary movements that could continue to the second switching contact piece 4 can be neutralized in the contact pressure arrangement.
  • the swivel joint in the first stop serves as a freewheel, so that rotary movements of the switching contact pieces 3, 4 are decoupled.
  • the spring element 17 is protected from torsional loads that could change the spring behavior of the spring element 17 .
  • the rotary bearing which is arranged between the support element 20 and the rotatable disk 22 on the first stop 15, is moved together with the first stop 15 when it moves.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Transmission Devices (AREA)
EP18734462.7A 2017-07-14 2018-06-14 Kontaktanpressanordnung Active EP3625813B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017212066.5A DE102017212066A1 (de) 2017-07-14 2017-07-14 Kontaktanpressanordnung
PCT/EP2018/065758 WO2019011571A1 (de) 2017-07-14 2018-06-14 Kontaktanpressanordnung

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EP3625813A1 EP3625813A1 (de) 2020-03-25
EP3625813B1 true EP3625813B1 (de) 2023-03-01

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EP (1) EP3625813B1 (zh)
KR (1) KR102311286B1 (zh)
CN (1) CN110914943B (zh)
DE (1) DE102017212066A1 (zh)
WO (1) WO2019011571A1 (zh)

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EP3926653A1 (en) * 2020-06-15 2021-12-22 ABB Power Grids Switzerland AG Contact bounce reduction system
CN112635263B (zh) * 2020-12-30 2022-09-13 滁州博杰科技有限公司 一种电磁辅助断路器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8309872B2 (en) * 2007-09-11 2012-11-13 Siemens Aktiengesellschaft Insulating switching rod

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Publication number Priority date Publication date Assignee Title
CN2386525Y (zh) 1999-08-23 2000-07-05 绍兴电力设备成套公司 高压真空开关可旋转式触头保持弹簧
US7215228B2 (en) 2001-06-01 2007-05-08 Hubbell Incorporated Circuit interrupting device with a turnbuckle and weld break assembly
JP2004220999A (ja) 2003-01-17 2004-08-05 Mitsubishi Electric Corp 密閉型開閉装置
DE102006015308A1 (de) * 2006-03-29 2007-10-11 Siemens Ag Isolierende Schaltstange
US7829814B2 (en) 2007-09-26 2010-11-09 Eaton Corporation Vacuum circuit interrupter grounding assembly
EP2460637B1 (en) * 2010-12-03 2013-11-13 ABB Technology AG A push rod of a vacuum interrupter and method of manufacturing the same
DE102013221910A1 (de) 2013-10-29 2015-04-30 Siemens Aktiengesellschaft Elektrischer Schalter
KR101850229B1 (ko) * 2013-12-26 2018-04-18 미쓰비시덴키 가부시키가이샤 개폐 장치
CN104576169B (zh) * 2014-12-25 2016-09-28 天津平高智能电气有限公司 绝缘拉杆及使用该绝缘拉杆的断路器

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US8309872B2 (en) * 2007-09-11 2012-11-13 Siemens Aktiengesellschaft Insulating switching rod

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DE102017212066A1 (de) 2019-01-17
CN110914943B (zh) 2023-01-31
KR20200024321A (ko) 2020-03-06
WO2019011571A1 (de) 2019-01-17
EP3625813A1 (de) 2020-03-25
US11107643B2 (en) 2021-08-31
CN110914943A (zh) 2020-03-24
US20200388445A1 (en) 2020-12-10
KR102311286B1 (ko) 2021-10-12

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