Adjusting device and method for adjusting switching device mechanisms

Abstract

The invention relates to an adjusting device (10) for adjusting the stroke (Hv) of a vacuum switching tube (2) and the bias of a contact compression spring (250) of a switching device mechanism (5), said spring being paired with the vacuum switching tube (2), for a medium-voltage switch and / or high-voltage switch, wherein the adjusting device (10) can be driven by a switch shaft (100), the switch shaft (100) is connected to a transmission element (300) via a connection element (200), and the transmission element (300) can be connected to a movable switch contact (400) of a medium-voltage switch and / or a high-voltage switch. The transmission element (300) is arranged in a rotatable manner and in a laterally movable manner in the connection element (200) along a recess (205).

Description

[0001] The invention relates to an adjusting device for adjusting the stroke of a vacuum switching tube and the preload of a contact pressure spring associated with the vacuum switching tube, a switching system or a switching device with such an adjusting device and to a method for adjusting the stroke of a vacuum switching tube and the preload of a contact pressure spring associated with the vacuum switching tube.

[0002] The assembly and manufacturing of switching device mechanisms for vacuum interrupters is associated with the occurrence of tolerances in the processes.

[0003] In some cases, these tolerances lead to impermissible deviations in mechanical parameters, such as speeds and angular positions.

[0004] These unacceptable deviations can be partially corrected by different adjustments.

[0005] Two methods are known in the prior art for this purpose.

[0006] Either, in the "OFF" position (where the contacts of the respective vacuum switching tubes are not electrically connected), the stop in this position is changed simultaneously for all poles, thus adjusting the stroke for all poles, or the tube stroke is adjusted independently for each individual pole by means of variable-length links. This adjustment is achieved by a single change in the length of these variable-length links, which maintain a constant length during operation. When the stroke is adjusted, the contact force of the vacuum switching tube's contact system is also changed. The contact force decreases regularly when the stroke is increased, that is, when the distance between the contacts of the vacuum switching tube in the "OFF" position of the switching mechanism is increased.

[0007] This results from the fact that when switching on with an increased stroke, the contact pressure spring in the switched-on position "ON" of the switching device mechanism is compressed less strongly, and accordingly presses with less force on the contacts of the vacuum switching tube.

[0008] From the prior art, US8497446B1 is known, which has a contact stroke adjustment option on a fixed contact by making the position of the fixed contact adjustable.

[0009] The purpose of the invention is to overcome the disadvantages of the prior art and to provide a cost-effective, simpler and more efficient alternative.

[0010] The problem is solved by Independent Claims 1 and 10 and the dependent claims thereof.

[0011] One embodiment relates to an adjusting device for adjusting the stroke of a vacuum interrupter tube and the preload of a contact compression spring associated with the vacuum interrupter tube in a switching device mechanism for medium-voltage switches and / or high-voltage switches, wherein the adjusting device can be driven via a switch shaft, the switch shaft is connected to a transmission element via a connecting element, and the transmission element can be connected to a movable switching contact of a medium-voltage switch and / or high-voltage switch, wherein the transmission element is rotatably arranged and laterally displaceable along a recess in the connecting element, and a contact compression spring is arranged on the connecting element in such a way thatthat the contact pressure spring acts on a laterally displaceable end of the transmission element, and the displaceable end of the transmission element assumes a first end position in an off position and a second end position in an on position of the switching device mechanism, and that by a switching process of the switching device mechanism the displaceable end can be moved from the first end position to the second end position and / or from the second end position to the first end position, wherein an adjustable stop acts on the displaceable end of the transmission element such that an adjustment of the adjustable stop causes a displacement of a first end position and thus a change in the stroke of the vacuum switching tube and the preload of a contact pressure spring associated with the vacuum switching tube.

[0012] This arrangement of the adjustable stop means that, at the same time as the stroke, the preload of the contact pressure spring associated with the vacuum switching tube is varied, but not the contact force, i.e., the force with which the contacts of the vacuum switching tube are pressed together by the contact pressure spring in the switched-on position of the switching device mechanism.

[0013] Preferably, the adjustable stop is formed by an eccentric or a movable, elongated stop element. In particular, the eccentric or the movable, elongated stop element or the recess can have a scale that provides an indication of the effect of the adjustment direction and the quantitative effect of the adjustment.

[0014] It is also preferred that the eccentric has a non-structured surface for stepless adjustment of the stroke of the vacuum switching tube and the preload of the contact pressure spring associated with the vacuum switching tube.

[0015] It is also preferred that the eccentric has a structured surface for stepless adjustment of the stroke of the vacuum switching tube and the preload of the contact pressure spring associated with the vacuum switching tube. In other words, the end face of the eccentric has a structured surface that allows stepless adjustment of the stroke of the vacuum switching tube and the preload of the contact pressure spring associated with the vacuum switching tube.

[0016] It is also preferred that the structured surface of the eccentric is designed as a toothed ring.

[0017] It is further preferred that the eccentric has a non-structured surface for stepless adjustment and a structured surface for stepped adjustment of the stroke of the vacuum switching tube and the preload of the contact pressure spring associated with the vacuum switching tube. This has the advantage that a single eccentric allows both standard settings in the form of the stepped design and other settings in the form of the non-structured surface.

[0018] It is also preferred that the adjustable stop is secured by a locking device in such a way that the adjustable stop cannot be adjusted without releasing the locking device.

[0019] It is also preferred that the locking means is formed by a locking pin and / or a screw and / or that the locking means is formed by a locking pin and / or a screw arranged eccentrically on the adjustable stop in addition to a central pivot point of the adjustable stop.

[0020] It is further preferred that the contact compression spring is formed with a compression spring and / or a tension spring.

[0021] It is also preferred that the adjustable stop (280) is provided with a scale that correlates with an adjustment position of the stroke or the variation of the stroke of the vacuum switching tube (2). In other words, the adjustable stop is provided with a scale that makes the adjustment position identifiable without having to measure the stroke of the vacuum switching tube.

[0022] Another embodiment relates to a switchgear assembly with one or more vacuum switching tubes and an adjustment device according to one or more of the above embodiments.

[0023] Another embodiment relates to a switching device with one or more vacuum switching tubes and an adjustment device according to one or more of the above embodiments.

[0024] Another embodiment relates to a method for simultaneously adjusting the stroke of a vacuum interrupter tube and the preload of a contact compression spring associated with the vacuum interrupter tube in a switching device mechanism for medium-voltage switches and / or high-voltage switches, wherein an adjusting device can be driven via a switch shaft, the switch shaft is connected to a transmission element via a connecting element, and the transmission element can be connected to a switched contact of a medium-voltage switch and / or high-voltage switch, wherein the transmission element is rotatably arranged and laterally displaceable along a recess in the connecting element, and a contact compression spring is arranged on the connecting element in such a way thatthat the contact pressure spring acts on a laterally displaceable end of the transmission element, and the displaceable end of the transmission element assumes a first end position in an off position and a second end position in an on position of the switching device mechanism, and that by a switching process of the switching device mechanism the displaceable end can be moved from the first end position to the second end position and / or from the second end position to the first end position, wherein an adjustable stop is set acting on the displaceable end of the transmission element such that an adjustment of the adjustable stop causes a displacement of a first end position and thus a change in the stroke of the vacuum switching tube and the preload of a contact pressure spring associated with the vacuum switching tube.

[0025] It is preferred that the adjustable stop is set when the switching mechanism of the adjusting device is in the switched-on position and / or secured in the switched-on position.

[0026] Alternatively, it is preferred that the adjustable stop is set when the switching mechanism of the adjusting device is in the off position and / or secured in the off position. In this configuration, the stop is set against the pre-tensioned contact pressure spring, i.e., not without force.

[0027] In particular, it is preferred that the adjustable stop be set without force.

[0028] This has the advantage that a more precise adjustment is possible, since the force required to adjust the adjustable stop and thus the switching device mechanism is negligible.

[0029] The invention is explained below using figures as an example. Figure 1: Schematic representation of the switching kinematics of a vacuum switching tube from the prior art; Figure 2: Schematic representation of an adjusting device according to the invention for adjusting the stroke of a vacuum switching tube and the preload of a contact pressure spring associated with the vacuum switching tube of a switching device mechanism; Figure 3: Schematic representation of an adjusting device according to the invention in the off position "OFF"; Figure 4: Schematic representation of an adjusting device according to the invention in the on position "ON"; Figure 5: Schematic graphical representation of the relationship between the spring force F and the spring position S.

[0030] The Figure 1Figure 1 shows a conventional switching kinematic mechanism 4 for a vacuum switching tube 2. The vacuum switching tube 2 has a fixed contact 410 and a moving contact 400. The moving contact 400 is movable via the switching kinematic mechanism 4. The switching kinematic mechanism 4 is driven by a switching shaft 100, and the switching movement is transmitted to the moving contact 400 via a connecting element 200 with a contact spring 250 and a transmission element 300. A first contact spring guide 210, which can also be described as a contact spring stop, securely holds the contact spring 250 on the connecting element 200. The connecting element 200 further has a recess 205 in which one end of the transmission element 300 is movably arranged, and the contact spring 250 acts on this end of the transmission element 300.

[0031] The shift kinematics 4 of the Figure 1It features three adjustable length elements: the first adjustable length element V1, the second adjustable length element V2, and the third adjustable length element V3. Typically, only one of the adjustable length elements V1, V2, V3 is provided per pole or per switching kinematic.

[0032] When the stroke is adjusted via one or more of the adjustable length elements V1, V2, V3, the contact force of the contact system of the vacuum switching tube 2, consisting of the moving contact 400 and the fixed contact 410, is also changed. The contact force decreases regularly when the stroke is increased, that is, when the distance between the contacts of the vacuum switching tube 2 is increased in the "OFF" position of the switching kinematics 4. The arrow 101 points in the direction of the switching movement; that is, in this case, the switching shaft 100 is rotated counterclockwise to move from an "OFF" position of the switching kinematics 4 to an "ON" position.

[0033] The Figure 2shows a schematic representation of an adjusting device 10 according to the invention for adjusting the stroke HV of a vacuum switching tube 2 and the preload of a contact pressure spring 250 associated with the vacuum switching tube 2 of a switching device mechanism 5.

[0034] The vacuum switching tube 2 has a fixed contact 410 and a moving contact 400. The moving contact 400 is movable via the switching mechanism 5. The switching mechanism 5 is driven by a switching shaft 100, and the switching movement is transmitted to the moving contact 400 via a connecting element 200 with a contact spring 250 and a transmission element 300. A first contact spring guide 210 securely holds the contact spring 250 on the connecting element 200. The connecting element 200 further has a recess 205 in which a sliding end 310 of the transmission element 300 is movably arranged, and the contact spring 250 acts on the sliding end 310 of the transmission element 300.

[0035] The arrow 101 points in the direction of the switching movement, that is, in this case, the switching shaft 100 is rotated counterclockwise to move from an off position OFF of the switching device mechanism 5 to an on position of the switching device mechanism 5.

[0036] The switching device mechanism 5 further features an adjustable stop 280, which here is designed in the form of an eccentric 282. In the OFF position, the adjustable stop 280 defines a first end position 315 of the movable end 310 of the transmission element 300. A change in this first end position 315 by the adjustable stop 280 causes a change in the stroke HV of the vacuum switching tube 2, but not a change in the contact force of the contact system, consisting of the moving contact 410 and the fixed contact 400 of the vacuum switching tube 2, in the ON position. The recess 205 of the connecting element 200 is elongated here in the direction of the axis A of the connecting element 200. The eccentric 282 allows stepless adjustment of the first end position 315 of the transmission element 300, resulting in fine adjustment of the stroke HV of the vacuum switching tube 2.

[0037] The Figure 3Figure 10 shows a schematic representation of an adjustment device 10 according to the invention for stepwise adjustment of the stroke HV of a vacuum switching tube 2 and the preload of a contact pressure spring 250 associated with the vacuum switching tube 2 of a switching device mechanism 5 in an off position OFF.

[0038] The vacuum switching tube 2, not shown here, has a fixed contact 410 and a moving contact 400. The moving contact 400 is movable via the switching mechanism 5. The switching mechanism 5 is driven by a switching shaft 100, and the switching movement is transmitted to the moving contact 400 via a connecting element 200 with a contact spring 250 and a transmission element 300. A first contact spring guide 210 and a second contact spring guide 215, which can also be described as a contact spring stop, hold the contact spring 250 securely on the connecting element 200. Additionally, a third contact spring guide 220, which can also be described as a cam, ensures optimized force transmission from the contact spring 250 to a sliding end 310 of the transmission element 300.The connecting element 200 further has a recess 205, in the recess the movable end 310 of the transmission element 300 is movably arranged and the contact pressure spring 250 acts on the movable end 310 of the transmission element 300.

[0039] Arrow 101 points in the direction of the switching movement; that is, in this case, the switching shaft 100 is rotated counterclockwise to move the switching mechanism 5 from an OFF position to an ON position. Furthermore, the intermediate element located between the switching shaft 100 and the connecting element 200 has a position indicator 105 and a position scale 106, which make it possible to determine the switch position without having to see the switching contacts. In the position of the Figure 3are the switching contacts 400, 410 separated, the switch and the switching device mechanism 5 in the off position "OFF",

[0040] The switching device mechanism 5 further features an adjustable stop 280, which here is designed in the form of an eccentric 284 with a structured surface for stepped adjustment. In the OFF position, the adjustable stop 280 defines a first end position 315 of the movable end 310 of the transmission element 300. A change in this first end position 315 by the adjustable stop 280 causes a change in the stroke HV of the vacuum switching tube 2, but not a change in the contact force of the contact system, consisting of the moving contact 410 and the fixed contact 400 of the vacuum switching tube 2.

[0041] The structured surface of the eccentric 284 for stepped adjustment enables a stepped adjustment of the first end position 315 of the transmission element 300, which leads to an adjustability in predetermined steps of the stroke HV of the vacuum switching tube 2.

[0042] Optionally, the adjustable stop 280 has a locking device 288, e.g. a screw, to prevent unintentional adjustment of the adjustable stop 280.

[0043] The Figure 4 shows a schematic representation of the adjusting device 10 according to the invention from the Figure 3 in the switched-on position "ON".

[0044] The intermediate element arranged between the switching shaft 100 and the connecting element 200 has a position indicator 105 and a position scale 106, which make it possible to determine the switch position without having to see the switching contacts. In the position of the Figure 4The switching contacts 400, 410 are in contact, the switch and the switching device mechanism 5 are in the switched-on position "ON".

[0045] The adjusting device 10 for stepwise adjusting the stroke HV of a vacuum switching tube 2 and the preload of a contact pressure spring 250 of a switching device mechanism 5 associated with the vacuum switching tube 2 (not shown) is therefore shown in the switched-on position ON.

[0046] The vacuum switching tube 2, not shown here, has a fixed contact 410 and a moving contact 400. The moving contact 400 is movable via the switching mechanism 5. The switching mechanism 5 is driven by a switching shaft 100, and the switching movement is transmitted to the moving contact 400 via a connecting element 200 with a contact spring 250 and a transmission element 300. A first contact spring guide 210 and a second contact spring guide 215 securely hold the contact spring 250 on the connecting element 200. Additionally, a third contact spring guide 220 ensures optimized force transmission from the contact spring 250 to a sliding end 310 of the transmission element 300.The connecting element 200 further has a recess 205, in the recess the movable end 310 of the transmission element 300 is movably arranged and the contact pressure spring 250 acts on the movable end 310 of the transmission element 300.

[0047] The switching device mechanism 5 further features an adjustable stop 280, which here is designed in the form of an eccentric 284 with a structured surface for stepped adjustment. In the OFF position, the adjustable stop 280 defines a first end position 315 of the movable end 310 of the transmission element 300. Figure 4In contrast, the movable end 310 of the transmission element 300 is in a second end position 320, in which the movable end 310 of the transmission element 300 exerts no force on the adjustable stop 280. A change in the first end position 315 by the adjustable stop 280 is possible without force in the second end position 320 and causes a change in the stroke HV of the vacuum switching tube 2, but not a change in the contact force of the contact system, consisting of the moving contact 410 and the fixed contact 400, of the vacuum switching tube 2.

[0048] The structured surface of the eccentric 284 for stepped adjustment enables a stepped adjustment of the first end position 315 of the transmission element 300, which leads to an adjustability in predetermined steps of the stroke HV of the vacuum switching tube 2.

[0049] The Figure 5This shows a schematic graphical representation of the relationship between the spring force F and the spring position S. A first spring position S1 is defined in the switched-off position OFF. Figure 2 or Figure 3 A second spring position S2 is assumed in the ON position. The first spring force F1 in the first spring position S1 is smaller than the second spring force F2 in the second spring position S2.

[0050] The adjustable stop 280 allows the first spring position S 1 to be adjusted to the first spring position S 1 ', whereby the first spring force F 1 is changed to the first spring force F 1 ', but the second spring force F 2 remains the same in the switched-on position. Patent claims

[0051] 2 Vacuum switching tube; 4 Switching kinematics; 5 Switching device mechanism; 10 Adjusting device; 100 Switching shaft; 101 Arrow in the direction of the switching movement; 105 Position indicator; 106 Position scale; 200 Connecting element; 205 Recess, in particular elongated hole in the connecting element 200; 210 First contact pressure spring guide or contact pressure spring stop for the contact pressure spring 250; 215 Second contact pressure spring guide or contact pressure spring stop for the contact pressure spring 250; 220 Third contact pressure spring guide or cam for the contact pressure spring 250; 250 Contact pressure spring; 280 Adjustable stop; 282 Eccentric with unstructured surface for stepless adjustment; 284 Eccentric with structured surface for stepped adjustment; 288 Locking means; 300 Transmission element; 310Movable end of the transmission element 300; 315First end position; 320Second end position; 400Moving contact of the vacuum switching tube 5; 410Fixed contact of the vacuum switching tube 5; A-axis, longitudinal axis of the connecting element 200; HV stroke of the vacuum switching tube; HK stroke of the contact pressure spring 250; V 1 first adjustable length element; V 2 second adjustable length element; V 3 third adjustable length element; ON-enabled position of the switching device mechanism 5; OFF-off position of the switching device mechanism 5.

Claims

1. Adjusting device (10) for adjusting a stroke (HV) of a vacuum switching tube (2) and a bias of a contact pressure spring (250) of a switching apparatus mechanism (5) for medium-voltage switches and / or high-voltage switches, said contact pressure spring being assigned to the vacuum switching tube (2), wherein the adjusting device (10) is able to be driven by way of a switch shaft (100), the switch shaft (100) by way of a connection element (200) is connected to a transmission element (300), and the transmission element (300) is able to be connected to a movable switch contact (400) of a medium-voltage switch and / or high-voltage switch, wherein the transmission element (300) is rotatable and disposed so as to be laterally displaceable along a recess (205) in the connection element (200), and a contact pressure spring (250) is disposed on the connection element (200) in such a manner that the contact pressure spring (250) acts on a laterally displaceable end (310) of the transmission element (300), and the displaceable end (310) of the transmission element (300) in a switched-off position (OFF) assumes a first terminal position (315), and in a switched-on position (ON) of the switching apparatus mechanism (5) assumes a second terminal position (320), and the displaceable end (310) by a switching process of the switching apparatus mechanism (5) is able to be transferred from the first terminal position (315) to the second terminal position (320) and / or from the second terminal position (320) to the first terminal position (315), characterized in that a readjustable detent (280) acts on the displaceable end (310) of the transmission element (300) in such a manner that a readjustment of the readjustable detent (280) causes a displacement of a first terminal position (315) and thus a variation of the stroke of the vacuum switching tube and of the bias of a contact pressure spring (250) which is assigned to the vacuum switching tube.

2. Adjusting device (10) according to Claim 1, characterized in that the readjustable detent (280) is formed by an eccentric (282, 284) or a displaceable elongate detent element.

3. Adjusting device (10) according to Claim 2, characterized in that the eccentric (282) has a non-structured face for adjusting in a stepless manner the stroke (HV) of the vacuum switching tube and the bias of the contact pressure spring (250) which is assigned to the vacuum switching tube.

4. Adjusting device (10) according to Claim 2, characterized in that the eccentric (284) has a structured face for adjusting in a stepped manner the stroke (HV) of the vacuum switching tube and the bias of the contact pressure spring (250) which is assigned to the vacuum switching tube.

5. Adjusting device (10) according to Claim 4, characterized in that the structured face of the eccentric (284) is configured as a crown gear.

6. Adjusting device (10) according to Claim 2, characterized in that the eccentric has a non-structured face for adjusting in a stepless manner and a structured face for adjusting in a stepped manner the stroke (HV) of the vacuum switching tube (5) and the bias of the contact pressure spring (250) which is assigned to the vacuum switching tube.

7. Adjusting device (10) according to one or a plurality of the preceding claims, characterized in that the readjustable detent (280) by a locking means (288) is fastened in such a manner that the readjustable detent (280) is not able to be readjusted without releasing the locking means (288).

8. Adjusting device (10) according to Claim 7, characterized in that the locking means (288) is formed by a peg and / or a screw, and / or the locking means is formed by a peg and / or a screw which in addition to a central point of rotation of the readjustable detent (280) is disposed eccentrically on the readjustable detent (280).

9. Adjusting device (10) according to one or a plurality of the preceding claims, characterized in that the contact pressure spring (250) is formed by way of a compression spring and / or a tension spring.

10. Adjusting device (10) according to one or a plurality of the preceding claims, characterized in that the readjustable detent (280) is provided with a graduation which correlates with an adjustment position of the stroke or of the variation of the stroke of the vacuum switching tube (2).

11. Switching system having one or more vacuum switching tubes (5) and an adjusting device (10) according to one or a plurality of the preceding claims.

12. Switching apparatus having one or more vacuum switching tubes (5) and an adjusting device (10) according to one or a plurality of Claims 1 to 10.

13. Method for simultaneously adjusting a stroke of a vacuum switching tube and a bias of a contact pressure spring (250) of a switching apparatus mechanism (5) for medium-voltage switches and / or high-voltage switches, said contact pressure spring being assigned to the vacuum switching tube, wherein an adjusting device (10) is able to be driven by way of a switch shaft (100), the switch shaft (100) by way of a connection element (200) is connected to a transmission element (300), and the transmission element (300) is able to be connected to a movable switch contact (400) of a medium-voltage switch and / or high-voltage switch, wherein the transmission element (300) is rotatable and disposed so as to be laterally displaceable along a recess (205) in the connection element (200), and a contact pressure spring (250) is disposed on the connection element (200) in such a manner that the contact pressure spring (250) acts on a laterally displaceable end (310) of the transmission element (300), and the displaceable end (310) of the transmission element (300) in a switched-off position (OFF) assumes a first terminal position (315), and in a switched-on position (ON) of the switching apparatus mechanism (5) assumes a second terminal position (320), and the displaceable end (310) by a switching process of the switching apparatus mechanism (5) is able to be transferred from the first terminal position (315) to the second terminal position (320) and / or from the second terminal position (320) to the first terminal position (315), characterized in that a readjustable detent (280) is adjusted to act on the displaceable end (310) of the transmission element (300) in such a manner that a readjustment of the readjustable detent (280) causes a displacement of a first terminal position (315) and thus a variation of the stroke of the vacuum switching tube and of the bias of a contact pressure spring (250) which is assigned to the vacuum switching tube.

14. Method for simultaneously adjusting a stroke of a vacuum switching tube and a bias of a contact pressure spring (250) of a switching apparatus mechanism (5), said contact pressure spring being assigned to the vacuum switching tube, according to Claim 13, characterized in that the readjustable detent (280) is adjusted when the switching apparatus mechanism (5) of the adjusting device (10) is situated in the switched-on position (ON) and / or is secured in the switched-on position (ON), or the readjustable detent (280) is adjusted when the switching apparatus mechanism (5) of the adjusting device (10) is situated in the switched-off position (OFF) and the adjustment of the readjustable detent (280) takes place counter to the biased contact pressure spring (250).

15. Method for simultaneously adjusting a stroke of a vacuum switching tube and a bias of a contact pressure spring (250) of a switching apparatus mechanism (5), said contact pressure spring being assigned to the vacuum switching tube, according to Claim 14, characterized in that the adjustment of the readjustable detent (280) takes place without applying force.

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