EP0541187A2 - Appliance for braking ratio of a rotation - Google Patents
Appliance for braking ratio of a rotation Download PDFInfo
- Publication number
- EP0541187A2 EP0541187A2 EP92250229A EP92250229A EP0541187A2 EP 0541187 A2 EP0541187 A2 EP 0541187A2 EP 92250229 A EP92250229 A EP 92250229A EP 92250229 A EP92250229 A EP 92250229A EP 0541187 A2 EP0541187 A2 EP 0541187A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stop
- stop blocks
- stop body
- blocks
- shaft
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
-
- 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
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
Definitions
- the invention relates to a device for braking the rotary movement of a shaft in the drive system of a high-voltage switch, with at least one projection, which projects along a part of the circumference of the shaft and has two flanks.
- Such a device is known for example from DE-AS 25 28 228.
- a brake disk hits a stop crank with a cam and thus releases the excess energy to a rubber block.
- the anchor point cannot be set with sufficient accuracy, and the construction is particularly simple or inexpensive.
- the present invention has for its object to provide a device for braking a rotary movement, which is constructed in a space-saving and structurally simple manner and thereby allows an exact adjustment of the braking distance.
- the object is achieved according to the invention by two essentially stationary stop blocks which lie outside the range of motion of the attachment and by a stop body which can be moved between the stop blocks and, if necessary, can be displaced through the attachment up to one of the stop blocks, each in connection with one of the stop blocks forms an essential fixed stop for the approach.
- each of the flanks of the neck is in one Direction of rotation can be moved past a stop block.
- the stop body is taken along by the flank and transported to the second stop block.
- the stop block forms a stationary stop in connection with the stop body and brakes the shoulder.
- the approach can advantageously have a toothing for mechanical coupling to parts of the drive system.
- the approach can be driven, for example, by the shaft on which it is fastened, and the drive force can be transmitted to other parts of the drive via the toothing on its circumference, or it can be driven conversely via the toothing.
- the approach is designed as part of a gear. It can be a commercially available gear that has been milled out to such an extent that only one shoulder remains on part of the circumference, including the toothing.
- An advantageous embodiment of the invention provides that the profile of the flanks is convex.
- flank comes into contact with the stop body at a defined point on the flank.
- the flank rolls over parts of the stop body during the rotary movement.
- the convex shape of the flanks ensures a uniform frictional connection between the shoulder and the stop body.
- the stop body is advantageously designed as a traverse and guided through a rod passing through it.
- the path of movement of the traverse is defined by the rod, on which it can be displaced through the projection.
- the invention can advantageously also be designed so that the stop body is designed as a crossmember and is guided by two parallel rods passing through it.
- the attachment can engage the stop body between the two rods, thereby preventing the stop body from tilting on the rods.
- a further advantageous embodiment of the invention provides that the stop body is sprung in relation to the stop blocks.
- the spring elements are movable and are each pushed against the stop blocks by the stop body until they develop their spring action between the respective stop block and the stop body.
- the stiffness of the spring elements allows the braking acceleration of the braked rotary movement to be set.
- disc springs can advantageously be used which have a central bore through which they rest on one of the rods are led.
- the figure shows 2 shows a schematic, partially sectioned side view of the braking device,
- the figure shows a device according to the invention for braking a rotary movement.
- the shaft 1 is connected to the contacts of a high-voltage switch via a crank mechanism (not shown).
- a shoulder 2 in the form of a gear wheel with a recess 3 is placed on the shaft 1 and fastened via a tongue and groove connection 4.
- the gear 2 has a toothing on the outside, which interacts with a worm drive 5.
- the gearwheel 2 and thus the shaft 1 are driven via the worm drive 5 and further gear ratios, not shown.
- the drive mechanism is not used directly to actuate the switch during a switching process, but rather to tension a spring accumulator that drives the switch in the event of a switch.
- the gear 2 runs between two guide rods 6, which are fixed at both ends.
- a traverse 7 is movably guided on the guide rods 6.
- the cross member 7 forms a stop body against which the flanks 8, 9, which delimit the recess 3 in the gear 2, abut.
- the crossbeam 7 can be displaced on the guide rods 6 by one of the flanks 8, 9 until it brakes on one of the stop blocks 12, 13, braked by the plate springs 10, 11.
- the movement of the shaft 1 is not stopped abruptly by the plate springs 10, 11, but is moderately braked. This is to prevent the kinetic energy in the area of the electrical switch from being converted even at the end of the movement and may cause damage.
- Rotational movements can be stopped in both directions, namely by abutting the flank 8 by means of the cross member 7 on the stop block 13 or by abutting the flank 9 by means of the cross member 7 on the stop block 12.
- the strong reduction of the motor drive to the gear 2 ensures that after the engine has been switched off there can be no transmission of movement in the opposite direction from the gear 2 to the engine.
Landscapes
- Transmission Devices (AREA)
- Braking Arrangements (AREA)
- Percussion Or Vibration Massage (AREA)
- Valve Device For Special Equipments (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Einrichtung zum Abbremsen der Drehbewegung einer Welle im Antriebssystem eines Hochspannungsschalters mit wenigstens einem entlang eines Teils des Umfangs der Welle hervorstehenden, zwei Flanken aufweisenden Ansatz.The invention relates to a device for braking the rotary movement of a shaft in the drive system of a high-voltage switch, with at least one projection, which projects along a part of the circumference of the shaft and has two flanks.
Eine derartige Einrichtung ist beispielsweise aus der DE-AS 25 28 228 bekannt. Bei der dort beschriebenen Bremsvorrichtung schlägt eine Bremsscheibe mit einem Nocken auf eine Anschlagkurbel und gibt so die überschüssige Energie an einen Gummiblock ab. Bei dieser Bremsvorrichtung ist weder der Anschlagpunkt genügend genau einstellbar, noch ist die Konstruktion besonders einfach oder kostengünstig.Such a device is known for example from DE-AS 25 28 228. In the braking device described there, a brake disk hits a stop crank with a cam and thus releases the excess energy to a rubber block. With this braking device, the anchor point cannot be set with sufficient accuracy, and the construction is particularly simple or inexpensive.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zum Abbremsen einer Drehbewegung zu schaffen, die platzsparend und konstruktiv einfach aufgebaut ist und dabei eine genaue Einstellung des Bremsweges erlaubt.The present invention has for its object to provide a device for braking a rotary movement, which is constructed in a space-saving and structurally simple manner and thereby allows an exact adjustment of the braking distance.
Die Aufgabe wird erfindungsgemäß gelöst durch zwei im wesentlichen ortsfeste Anschlagblöcke, die außerhalb des Bewegungsbereiches des Ansatzes liegen sowie durch einen zwischen den Anschlagblöcken beweglichen, durch den Ansatz bedarfsweise jeweils bis zu einem der Anschlagblöcke verschiebbaren Anschlagkörper, der jeweils in Verbindung mit einem der Anschlagblöcke einen im wesentlichen ortsfesten Anschlag für den Ansatz bildet.The object is achieved according to the invention by two essentially stationary stop blocks which lie outside the range of motion of the attachment and by a stop body which can be moved between the stop blocks and, if necessary, can be displaced through the attachment up to one of the stop blocks, each in connection with one of the stop blocks forms an essential fixed stop for the approach.
Dadurch, daß die ortsfesten Anschlagblöcke nur in Verbindung mit dem verschiebbaren Anschlagkörper einen Anschlag für den Ansatz bilden, ist jede der Flanken des Ansatzes in einer Drehrichtung an je einem Anschlagblock vorbeibewegbar. In der entgegengesetzten Drehrichtung wird nach dem Passieren des ersten Anschlagblocks der Anschlagkörper von der Flanke mitgenommen und bis zum zweiten Anschlagblock transportiert. Dort bildet der Anschlagblock in Verbindung mit dem Anschlagkörper einen ortsfesten Anschlag und bremst den Ansatz ab. Mit der beschriebenen Konstruktion lassen sich Bewegungsamplituden von mehr als 360° problemlos realisieren. Die mögliche Bewegungsamplitude ist durch die Ausdehnungen des Ansatzes sowie durch die Entfernung der Anschlagblöcke voneinander und die Ausmaße des Anschlagkörpers bestimmt.Characterized in that the fixed stop blocks form a stop for the neck only in connection with the displaceable stop body, each of the flanks of the neck is in one Direction of rotation can be moved past a stop block. In the opposite direction of rotation, after passing the first stop block, the stop body is taken along by the flank and transported to the second stop block. There the stop block forms a stationary stop in connection with the stop body and brakes the shoulder. With the described construction, movement amplitudes of more than 360 ° can be easily realized. The possible amplitude of movement is determined by the extension of the extension and by the distance of the stop blocks from one another and the dimensions of the stop body.
Der Ansatz kann vorteilhaft eine Verzahnung zur mechanischen Ankopplung an Teile des Antriebssystems aufweisen. Der Ansatz kann beispielsweise durch die Welle, auf der er befestigt ist, angetrieben werden, und die Antriebskraft über die Verzahnung an seinem Umfang auf andere Teile des Antriebs übertragen oder er kann umgekehrt über die Verzahnung angetrieben werden.The approach can advantageously have a toothing for mechanical coupling to parts of the drive system. The approach can be driven, for example, by the shaft on which it is fastened, and the drive force can be transmitted to other parts of the drive via the toothing on its circumference, or it can be driven conversely via the toothing.
Als besonders vorteilhaft erweist es sich, daß der Ansatz als Teil eines Zahnrades ausgebildet ist. Es kann sich dabei um ein handelsübliches Zahnrad handeln, das soweit ausgefräst ist, daß nur noch ein Ansatz auf einen Teil des Umfangs mitsamt der Verzahnung stehenbleibt.It proves to be particularly advantageous that the approach is designed as part of a gear. It can be a commercially available gear that has been milled out to such an extent that only one shoulder remains on part of the circumference, including the toothing.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß das Profil der Flanken konvex ausgebildet ist.An advantageous embodiment of the invention provides that the profile of the flanks is convex.
Dadurch ist gewährleistet, daß die jeweilige Flanke mit dem Anschlagkörper an einem definierten Punkt der Flanke in Berührung kommt. Je nachdem, welche Bewegungsbahn der Anschlagkörper hat, rollt die Flanke über Teilen des Anschlagkörpers während der Drehbewegung ab. Dabei ist durch die konvexe Form der Flanken ein gleichförmiger Kraftschluß zwischen dem Ansatz und dem Anschlagkörper gewährleistet.This ensures that the respective flank comes into contact with the stop body at a defined point on the flank. Depending on the movement path of the stop body, the flank rolls over parts of the stop body during the rotary movement. The convex shape of the flanks ensures a uniform frictional connection between the shoulder and the stop body.
Der Anschlagkörper ist vorteilhaft als Traverse ausgebildet und durch eine diese durchsetzende Stange geführt.The stop body is advantageously designed as a traverse and guided through a rod passing through it.
Durch die Stange ist die Bewegungsbahn der Traverse festgelegt, auf der diese durch den Anstz verschiebbar ist.The path of movement of the traverse is defined by the rod, on which it can be displaced through the projection.
Die Erfindung kann vorteilhaft auch so gestaltet werden, daß der Anschlagkörper als Traverse ausgebildet und durch zwei parallele, diese durchsetzende Stangen geführt ist.The invention can advantageously also be designed so that the stop body is designed as a crossmember and is guided by two parallel rods passing through it.
Der Ansatz kann in diesem Fall an dem Anschlagkörper zwischen den beiden Stangen angreifen, wodurch ein Verkanten des Anschlagkörpers an den Stangen verhindert ist.In this case, the attachment can engage the stop body between the two rods, thereby preventing the stop body from tilting on the rods.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Anschlagkörper gegenüber den Anschlagblöcken gefedert ist.A further advantageous embodiment of the invention provides that the stop body is sprung in relation to the stop blocks.
Dadurch ergibt sich beim Anschlagen des durch den Ansatz verschobenen Anschlagkörpers an die Anschlagblöcke kein abruptes Abbremsen des Ansatzes, sondern ein Abbremsen auf einem Federweg, wodurch eine mechanische Überbeanspruchung verhindert wird.As a result, when the stopper body displaced by the shoulder strikes the stop blocks, there is no abrupt braking of the shoulder, but rather braking on a spring travel, which prevents mechanical overloading.
Es sind vorteilhaft zwischen dem Anschlagkörper und den Anschlagblöcken auf einer Stange geführte Federelemente vorgesehen.Spring elements guided on a rod are advantageously provided between the stop body and the stop blocks.
Die Federelemente sind beweglich und werden durch den Anschlagkörper jeweils gegen die Anschlagblöcke verschoben, bis sie zwischen dem jeweiligen Anschlagblock und dem Anschlagkörper ihre Federwirkung entfalten. Durch die Steifheit der Federelemente läßt sich die Bremsbeschleunigung der abgebremsten Drehbewegung einstellen. Es lassen sich beispielsweise vorteilhaft Tellerfedern verwenden, die eine Mittelbohrung aufweisen, durch die sie auf einer der Stangen geführt sind.The spring elements are movable and are each pushed against the stop blocks by the stop body until they develop their spring action between the respective stop block and the stop body. The stiffness of the spring elements allows the braking acceleration of the braked rotary movement to be set. For example, disc springs can advantageously be used which have a central bore through which they rest on one of the rods are led.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in einer Zeichnung gezeigt und anschließend beschrieben.In the following, the invention is shown on the basis of an exemplary embodiment in a drawing and then described.
Dabei zeigt die Figur
eine schematische, teilweise geschnittene Seitenansicht der Abbremseinrichtung,
Die Figur zeigt eine erfindungsgemäße Einrichtung zum Abbremsen einer Drehbewegung. Die Welle 1 ist über einen nicht dargestellten Kurbeltrieb mit den Kontakten eines Hochspannungsschalters verbunden. Auf die Welle 1 ist ein Ansatz 2 in Form eines Zahnrades mit einer Ausnehmung 3 aufgesetzt und über eine Feder-Nut-Verbindung 4 befestigt. Das Zahnrad 2 weist außen eine Verzahnung auf, die mit einem Schneckentrieb 5 zusammenwirkt. Über den Schneckentrieb 5 und weitere, nicht dargestellte Übersetzungen wird das Zahnrad 2 und damit die Welle 1 angetrieben. Der Antriebsmechanismus dient nicht direkt zum Betätigen des Schalters während eines Schaltvorgangs, sondern zum Spannen eines Federspeichers, der im Schaltfall den Schalter antreibt.The figure shows
2 shows a schematic, partially sectioned side view of the braking device,
The figure shows a device according to the invention for braking a rotary movement. The shaft 1 is connected to the contacts of a high-voltage switch via a crank mechanism (not shown). A shoulder 2 in the form of a gear wheel with a
Das Zahnrad 2 läuft zwischen zwei Führungsstangen 6, die an beiden Enden ortsfest gelagert sind. Auf den Führungsstangen 6 ist eine Traverse 7 beweglich geführt. Die Traverse 7 bildet einen Anschlagkörper, an den die Flanken 8, 9, die die Ausnehmung 3 in dem Zahnrad 2 begrenzen, anschlagen. Die Traverse 7 ist durch jeweils eine der Flanken 8, 9 soweit auf den Führungsstangen 6 verschiebbar, bis sie, durch die Tellerfedern 10, 11 gebremst, an einem der Anschlagblöcke 12, 13 anschlägt. Durch die Tellerfedern 10, 11 wird die Bewegung der Welle 1 nicht abrupt angehalten, sondern mäßig abgebremst. Damit soll verhindert werden, daß die kinetische Energie im Bereich des elektrischen Schalters selbst am Ende der Bewegung umgesetzt wird und eventuell Schaden anrichtet. Dabei können Drehbewegungen in beiden Richtungen angehalten werden, und zwar durch Anschlag der Flanke 8 mittels der Traverse 7 am Anschlagblock 13 bzw. durch Anschlagen der Flanke 9 mittels der Traverse 7 am Anschlagblock 12.The gear 2 runs between two
Durch die starke Untersetzung des Motorantriebes zu dem Zahnrad 2 ist gewährleistet, daß nach Abschalten des Motors keine Übertragung einer Bewegung auf umgekehrten Wege vom Zahnrad 2 zu dem Motor stattfinden kann.The strong reduction of the motor drive to the gear 2 ensures that after the engine has been switched off there can be no transmission of movement in the opposite direction from the gear 2 to the engine.
Claims (9)
gekennzeichnet durch zwei im wesentlichen ortsfeste Anschlagblöcke (12,13), die außerhalb des Bewegungsbereiches des Ansatzes (2) liegen sowie durch einen zwischen den Anschlagblöcken (12,13) beweglichen, durch den Ansatz (2) bedarfsweise jeweils bis zu einem der Anschlagblöcke (12,13) verschiebbaren Anschlagkörper (7), der jeweils in Verbindung mit einem der Anschlagblöcke (12,13) einen im wesentlichen ortsfesten Anschlag für den Ansatz (2) bildet.Device for braking the rotary movement of a shaft in the drive system of a high-voltage switch, with at least one shoulder with two flanks protruding along part of the circumference of the shaft,
characterized by two essentially stationary stop blocks (12, 13), which lie outside the range of motion of the extension (2), and by one movable between the stop blocks (12, 13) and, if necessary, by the extension (2) up to one of the stop blocks ( 12, 13) displaceable stop body (7) which, in conjunction with one of the stop blocks (12, 13), forms an essentially stationary stop for the extension (2).
dadurch gekennzeichnet, daß der Ansatz (2) eine Verzahnung zur mechanischen Ankoppelung an Teile des Antriebssystems aufweist.Device according to claim 1,
characterized in that the projection (2) has a toothing for mechanical coupling to parts of the drive system.
dadurch gekennzeichnet, daß der Ansatz (2) als Teil eines Zahnrades ausgebildet ist.Device according to claim 2,
characterized in that the extension (2) is designed as part of a gear wheel.
dadurch gekennzeichnet, daß das Profil der Flanken (8,9) konvex ausgebildet ist.Device according to claim 1 or one of the following,
characterized in that the profile of the flanks (8,9) is convex.
dadurch gekennzeichnet, daß der Anschlagkörper (7) als Traverse ausgebildet und durch eine diese durchsetzende Stange (6) geführt ist.Device according to claim 1 or one of the following,
characterized in that the stop body (7) is designed as a traverse and is guided through a rod (6) passing through it.
dadurch gekennzeichnet, daß der Anschlagkörper (7) als Traverse ausgebildet und durch zwei parallele, diese durchsetzende Stangen (6) geführt ist.Device according to claim 1 or one of the following,
characterized in that the stop body (7) is designed as a cross member and by two parallel, this penetrating rods (6) is guided.
dadurch gekennzeichnet, daß der Anschlagkörper (7) gegenüber den Anschlagblöcken (12,13) gefedert ist.Device according to claim 1 or one of the following,
characterized in that the stop body (7) is sprung in relation to the stop blocks (12, 13).
dadurch gekennzeichnet, daß zwischen dem Anschlagkörper (7) und den Anschlagblöcken (12,13) auf einer Stange (6) geführte Federelemente (10,11) vorgesehen sind.Device according to claim 7,
characterized in that spring elements (10, 11) guided on a rod (6) are provided between the stop body (7) and the stop blocks (12, 13).
dadurch gekennzeichnet, daß die Federn (10,11) Tellerfeder sind.Device according to claim 8,
characterized in that the springs (10, 11) are disc springs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4134580 | 1991-10-17 | ||
| DE4134580A DE4134580A1 (en) | 1991-10-17 | 1991-10-17 | DEVICE FOR BRAKING A ROTATIONAL MOVEMENT |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0541187A2 true EP0541187A2 (en) | 1993-05-12 |
| EP0541187A3 EP0541187A3 (en) | 1995-03-01 |
| EP0541187B1 EP0541187B1 (en) | 1996-04-17 |
Family
ID=6442993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92250229A Expired - Lifetime EP0541187B1 (en) | 1991-10-17 | 1992-08-26 | Appliance for braking ratio of a rotation |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0541187B1 (en) |
| AT (1) | ATE137055T1 (en) |
| DE (2) | DE4134580A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2879017A1 (en) * | 2004-12-07 | 2006-06-09 | Valeo Electronique Sys Liaison | Control assembly for e.g. vehicle battery circuit opening and closing device, has frame closed by case with stops, in cooperation with pin, tending to push and bring end teeth between worm coils, when motor is fed and not fed, respectively |
| CN106981382A (en) * | 2017-06-08 | 2017-07-25 | 山东民生电气设备有限公司 | A kind of low voltage tap changer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2528228B2 (en) * | 1975-06-25 | 1978-04-20 | Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen | Braking device for drives of electric circuit breakers |
| DD296377A5 (en) * | 1990-06-28 | 1991-11-28 | Starkstromanlagen Dresden Gmbh (I.G.),De | CLAMPING DEVICE FOR THE SPRING OF A JUMPING UNIT FOR A MOVABLE CONTACT LINK TO BE OPERATED IN A HIGH VOLTAGE ELECTRIC SWITCH |
-
1991
- 1991-10-17 DE DE4134580A patent/DE4134580A1/en not_active Withdrawn
-
1992
- 1992-08-26 AT AT92250229T patent/ATE137055T1/en not_active IP Right Cessation
- 1992-08-26 DE DE59206032T patent/DE59206032D1/en not_active Expired - Lifetime
- 1992-08-26 EP EP92250229A patent/EP0541187B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2528228B2 (en) * | 1975-06-25 | 1978-04-20 | Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen | Braking device for drives of electric circuit breakers |
| DD296377A5 (en) * | 1990-06-28 | 1991-11-28 | Starkstromanlagen Dresden Gmbh (I.G.),De | CLAMPING DEVICE FOR THE SPRING OF A JUMPING UNIT FOR A MOVABLE CONTACT LINK TO BE OPERATED IN A HIGH VOLTAGE ELECTRIC SWITCH |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2879017A1 (en) * | 2004-12-07 | 2006-06-09 | Valeo Electronique Sys Liaison | Control assembly for e.g. vehicle battery circuit opening and closing device, has frame closed by case with stops, in cooperation with pin, tending to push and bring end teeth between worm coils, when motor is fed and not fed, respectively |
| CN106981382A (en) * | 2017-06-08 | 2017-07-25 | 山东民生电气设备有限公司 | A kind of low voltage tap changer |
| CN106981382B (en) * | 2017-06-08 | 2019-05-07 | 山东民生电气设备有限公司 | A kind of low voltage tap changer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4134580A1 (en) | 1993-04-22 |
| EP0541187B1 (en) | 1996-04-17 |
| EP0541187A3 (en) | 1995-03-01 |
| DE59206032D1 (en) | 1996-05-23 |
| ATE137055T1 (en) | 1996-05-15 |
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