EP1913614B1 - Circuit breaker - Google Patents

Abstract

A circuit breaker has at least one pole arrangement with a movable contact. A twin-armed lever is pivotally mounted for opening and closing the movable contact. A switch-on energy storage device is provided and a cam disc that is coupled to the switch-on energy storage device and, via an actuating element, to a first end of the lever. The second end of the lever is connected to the movable contact piece of the pole arrangement. There is also provided at least one switch-off energy storage device. The circuit breaker has a simple and compact design. The actuating element is a switching shaft, which interacts with the cam disc, is mounted such that it can rotate and is connected to the first end of the twin-armed lever via the switch-off energy storage device.

Description

The invention relates to a circuit breaker having at least one pole arrangement, which comprises a movable contact, a rotatably mounted double-armed lever for opening and closing the movable contact, a Einschaltergiespeicher, as well as with a cam, which with the Einschaltergiespeicher and via an actuator with a first end of Levers is coupled, wherein the second end of the lever is connected to the movable contact piece of the pole arrangement, and at least one Ausschaltenergiespeicher.

A circuit breaker of this kind is from the DE 4 138 333 C2 known. Bei.diesem switch, a rotatably mounted double-armed lever on a cam member / the cam facing the first end of an actuator in the form of a rotatably mounted roller, which cooperates with the cam member, wherein the cam member by the energy stored in a spring element as a switch energy storage energy in rotation is offset. A movable contact is movably arranged relative to a fixed contact by means of the second end of the rotatably mounted double-armed lever between an open state and a closed state of the switch. The arrangement of spring element and cam element is pivotally mounted on a movable support means, wherein a locking device is provided for engaging and disengaging the movable support means. Connected to the double-armed lever at its first end are cut-out energy storage means which, at a power-up, pick up energy used to turn off the switch. Such an arrangement has a complicated and expensive structure, for example for opening the movable contact the rotatably mounted support elements with the cam elements arranged thereon must be pivoted in order to enable the separation of the contacts. Such a structure takes in particular a large volume to complete.

Object of the present invention is to form a circuit breaker of the type mentioned, which has a simple and compact structure.

According to the invention, the object is achieved in that the actuating member is a controllable by the cam, rotatably mounted shift shaft which is connected to the first end of the two-armed lever via the Ausschaltenergiespeicher. With such an arrangement, the energy of the switch-on energy storage is transferred via the switching shaft as an actuator and the Ausschaltenergiespeicher on the lever for closing the movable contact, whereby a compact design is possible.

In a preferred embodiment extends in a multi-pole arrangement, the control shaft over the entire pole arrangement and has for each movable contact on a driver on which a first end of the respective power-off energy storage is arranged articulated. An advantage of such a switching shaft is that the energy of the switch-on energy storage is transferable by the switching shaft to the respective movable contact by the respective driver in a multi-pole arrangement, for example in a three-pole circuit breaker, so that a synchronous drive the entire pole without an expensive holder guaranteed for a crossbar.

In a further embodiment of the invention is the Ausschaltenergiespeicher at a second end hingedly connected to the first end of the double-armed lever. The articulated arrangement of the cut-off energy storage between the switching shaft and the double-armed lever allows the cut-off energy storage in its tensioned state is almost in an extended position with respect to a line between the axis of rotation of the switching shaft and the second end of the Ausschaltenergiespeichers. As a result, only a small torque is exerted on the shift shaft, so that it can be fixed in a simple manner, wherein the force exerted by the Ausschaltenergiespeicher torque is sufficiently large to separate the dissolved contacts with fixation of the shift shaft.

In an expedient development of the Ausschaltenergiespeicher comprises a spring element. Such a Ausschaltenergiespeicher allows in the inventive arrangement a simple tensioning of the Ausschaltenergiespeichers during the switch-on.

In a preferred embodiment, the switch-on energy storage device comprises a spring element, which is mounted at a first end on a housing part and is coupled at a second end via a clamping shaft with the cam. Such an arrangement allows for a simple transmission of the energy of the Einschaltspeichers means of the cam on the lever, on the other hand can be supplied via a connected to the clamping shaft drive unit in a simple way the turn-on energy storage energy.

In a preferred embodiment, the turn-on energy storage is maintained at a first end and connected at a second end to an eccentric of a tensioning device, cooperate with the return movement limiting means, and the means comprise one at the first end of the turn-on energy storage arranged latch mechanism. Such an arrangement is advantageously simple, inexpensive and at the same time wear-resistant, because a return movement of the switch-on energy storage is limited or prevented solely by the latch mechanism arranged at the first end of the switch-on energy store.

In an expedient development, the means comprise a ratchet mechanism triggering guide part, with which the first end of the switch energy storage device is movably mounted on a fixed axis by means of a slot formed in the guide member and which is connected to the second end of the switchgear energy storage. An advantage of such an arrangement is that due to the eccentrically mounted second end of the switch energy storage and mounted in a slot guide part of a movement path of the guide member with respect to its free end during a switch from a trajectory after the switch-on different, so that with the latch mechanism on the one hand Clamping the switch-on energy storage takes place and on the other hand, a return movement is limited.

In a preferred embodiment, the pawl mechanism has a pawl rotatably movable about the fixed axis between a first and a second position, to which a spring element engages. With such a pawl, the latch mechanism can be easily set up.

In a preferred embodiment, the fixed axis and the spring element are held on a fastening element. In such an arrangement, the pawl can be pivoted by means of the spring element in a simple manner between its first and its second position about the axis.

In an advantageous embodiment, a stop element is provided on the guide part, which cooperates with a clamping recess on the pawl. The arrangement of the stop element on the guide member and the interaction with the clamping recess a simple way to deflect the pawl from its first is realized in its second position.

In a further development, the pawl on a locking recess. Upon a return movement of the switch-on energy storage device after a switch-on operation, the stop element engages in the locking recess, so that a return movement limitation is formed in a simple and effective manner.

In a further preferred embodiment, in the tensioning device for the switching energy store, the clamping shaft rotatable by means of a drive wheel for clamping the turn-on energy storage firmly connected to an eccentric and with a cam and has a trigger stop, wherein the drive wheel is coupled via a coupling with the clamping shaft and the clutch is a latch assembly. By such a pawl arrangement, a clamping device is provided, which is designed in terms of their coupling in an advantageous manner simple and cost-effective, because the latch assembly requires relatively few components. It is prevented solely by the pawl arrangement that takes place by further actuation of the drive wheel after a clamping operation improper loading of the clamping device.

In a preferred embodiment, the pawl assembly has a pawl rotatably mounted on the drive wheel, and a fixed stop element is provided for controlling the pawl. An advantage of such an arrangement is that alone by the rotatable arrangement of the pawl and the fixed stop element controlling the pawl and thereby decoupling of the drive wheel is made possible by the clamping shaft.

In an advantageous embodiment, the fixed stop element is arranged such that, when the switch-on energy store is tensioned, the pawl releases the clamping shaft. Such an arrangement provides an easy way to decouple the tensioning shaft from the drive after a clamping operation with a tensioned switch energy storage.

In another advantageous embodiment, the pawl assembly has a fixedly connected to the clamping shaft and cooperating with the pawl carrier. The arrangement of such a driver is a simple and convenient way to couple the drive wheel and the clamping shaft with each other by means of the pawl to perform a clamping operation.

The latch assembly may be guided in different ways with respect to its free end, for example by a stationary guideway. In an advantageous development, the latch arrangement has a spring element. By providing a spring element ensures that the pawl is held during a clamping operation in a cooperating with the driver position.

In a further preferred embodiment of the invention, a position pin is provided on the drive wheel. The provision of such a position pin advantageously limits the rotation of the rotatably mounted pawl by that of the Spring element transmitted force, whereby a wear of the pawl is prevented by a sliding movement on the clamping shaft during rotation in preparation for a clamping operation of the circuit breaker.

In a further preferred embodiment of the invention, a locking mechanism for preventing the discharge of the power-on energy storage is provided with a push button, which is coupled in an unlocked position of the locking mechanism by means of a power transmission element with a discharge trigger for discharging the power switch storage via a positive connection, so that a force acting on the pushbutton switch-on via the power transmission element into the discharge trigger for releasing the switch-on energy storage device is introduced, wherein the force transmission element is connected to form-closure interrupting means, which are arranged for transferring the locking mechanism into a locking position in which the positive connection is released, the pushbutton and the force transmission element in the unlocked position in a Joint longitudinal direction are guided, so that a pushing movement of the push button s is introduced via a longitudinal movement of the power transmission element in the Einschaltauslöser, wherein the force transmission element is pivotally mounted, so that in a locking position, a direction of movement of the force transmission element is aligned at an angle to the thrust movement of the pushbutton, wherein the interlocking means with the switching shaft of the switch and / or with a sub-switch are coupled. Advantageously, the power transmission element is not guided longitudinally movable, but reliably removable by initiating a rotational movement of the positive connection between the push-button and the release release. In addition, are great Strokes avoided so that the locking mechanism is both reliable and compact.

In an advantageous embodiment, the form-closure interrupting means have an angle lever articulated on a stationary axis of rotation, which is coupled to a return hanger with a return spring and to a connecting bearing by means of a pivoting lever with the force transmission element. According to this expedient further development, the movement for pivoting the power transmission element is initiated via an angle lever, thereby providing a multifunctional and at the same time compact locking mechanism.

According to an expedient further development of the angle lever is coupled by lever kinematics with a switching shaft of the sub-switch, that when the sub-switch is in a disconnected position, the angle lever pivoted against the spring force of a return spring and the power transmission element is transferred from the unlocked position into the locking position. In this way, the sub-switch is coupled to the locking mechanism, so that when the sub-switch is in a disconnected position, a discharge of the switch energy storage and thus a connection of the switch, which is for example a circuit breaker is made impossible. The coupling between the power transmission element and auxiliary switch via a suitable lever kinematics and on the already described angle lever. The power transmission element is mechanically coupled to the drive axle of the secondary switch. An unintentional triggering of the switch such as a circuit breaker in an open, so located in the disconnected position sub-switch, which is designed for example as a circuit breaker is on this Way avoided.

According to an advantageous development of the invention, the angle lever is coupled by lever kinematics with a slide lock of a drawer so that when the switch is moved on the slot from a contact position, the angle lever pivoted against the spring force of the return spring and the power transmission element from the unlocked position into the locking position is transferred. According to this further development of the invention, the lever kinematics is coupled with a slide-in lock. Moving a switch on a drawer, however, has the same effect as a separate auxiliary switch, especially in the case of air-insulated switches, so that the displacement on the drawer slide is equated here with the opening of the contacts of a secondary switch and thus with the coupling with a secondary switch. When moving the switch, for example, firmly connected to the switch contacts are separated from contacts that are permanently mounted on a switchgear. In this case, the switch is movably mounted in the switchgear by means of the insert.

According to a further expedient development, the angle lever on a driver pin which extends in a slot of a drive lever, wherein the drive lever is fixed at its end remote from the slot on a cam element of the switching shaft of the circuit breaker, so that in a closed position of the switching shaft of the angle lever Canceling the positive connection between the push-button and discharge shutter is pivoted. According to this advantageous further development, the angle lever and thus the force transmission element can be coupled to the position of the switching shaft of the circuit breaker, so that a discharge of the switch energy storage is made impossible if the Contacts of the switch are already in a contact position. In such a case, empty circuits would be triggered, wherein the energy of the switch-on energy storage is no longer converted into kinetic energy of the switching mechanism. However, the switching mechanism is heavily stressed by these empty circuits. Of course, it is also possible that the angle lever is coupled both via the drive lever with the switching shaft of the switch or circuit breaker, as well as an appropriate lever kinematics with the sub-switch and / or disconnector or with the lock of a drawer. The term circuit breaker in such a case also includes a plurality of series-connected single breakers. The slot of the drive lever is used for mechanical separation of the lock, which is triggered by a sub-switch, and the lock, which is caused by the switching position of the switch shaft.

In an expedient embodiment, the locking mechanism, which is switchable between a locking position, in which the triggering of a switch-on is prevented by contacting the contacts of the circuit breaker, and an unlocking position, in which the triggering of the switch-on is enabled switchable, connected to a switch-ready indicator and the Ready-on indicator on the circuit breaker arranged visually perceptible. An on-hook readiness indicator located directly on the circuit breaker allows an operator to read the state of the circuit breaker directly on the circuit breaker. So far, such a readiness indication was made at a circuit breaker slot with the disadvantage that the state of the circuit breaker was queried only indirectly via the circuit breaker insert. Another advantage is that an additional mechanism for a display on the circuit breaker slot eliminated.

In a preferred embodiment, the power-on read indicator is mechanical. Such a mechanical switch-on readiness indicator can be linked to the locking mechanism in a simple manner.

In a further preferred embodiment, the switch-on readiness display is optically realized. An optical power-on indicator is an advantageous way of visually sensing the state of the circuit breaker.

The invention will be described below with reference to embodiments with reference to figures of the drawing.

Show it:

FIG. 1

a schematic representation of the circuit breaker according to the invention in a first position;

FIG. 2

a schematic representation of the circuit breaker according to the invention in a second position;

FIG. 3

a schematic representation of a power-on energy storage device in a first position;

FIG. 4

a schematic representation of the switch-on energy storage device in a second position;

FIG. 5

a schematic representation of the switch-on energy storage device in a third position;

FIG. 6

a schematic representation of the switch-on energy storage device in a fourth position;

FIG. 7

a schematic representation of the turn-on energy storage device in a fifth position;

FIG. 8

a schematic side view of the clamping device;

FIG. 9

a front view of the clamping device FIG. 8 in a first position during the tensioning process;

FIG. 10

a front view of the clamping device in a second position;

FIG. 11

a schematic representation of an embodiment of the locking mechanism in an unlocked position;

FIG. 12

the locking mechanism according to FIG. 11 in a locking position; and

FIG. 13

the locking mechanism according to FIG. 11 in a further locking position.

FIG. 1 shows a schematic representation of a circuit breaker 1 according to the invention. The power switch 1 comprises a switch-on energy storage 2, which is arranged on a mounting part 3 of the circuit breaker 1. The switch-on energy storage 2 is connected by means of an articulated connection to an eccentric 4 via a clamping shaft 5 with the cam 6. The cam 6 is about an axis of rotation 7 rotatably mounted and rests with its outer surface 8 on a cam member 9 of a switching shaft 10 at. The switching shaft 10 is rotatably mounted about an axis of rotation 11 and includes a second driver 12 which is pivotally connected to a first end 13 of a cut-out energy storage device 14. A second end 15 of the Ausschaltenergiespeichers 14 is connected to a two-armed lever 17, at its first end 18 of the Ausschaltenergiespeicher 14 is pivotally coupled, and which is movably mounted about an axis of rotation 19. A second end 20 of the double-armed lever 17 in turn is pivotally coupled to a pole assembly 21. The pole assembly 21 includes a first movable contact 22 which is pivotally connected to the second end 20 of the double-armed lever 17, and a second contact 23 which is fixedly arranged.

In FIG. 1 the circuit breaker 1 is shown in an off position. The turn-on energy storage 2 is in a position in which energy for triggering a switching operation is stored. In this position of the switch-on energy storage 2, the cam 6 is located on the cam member 9 of the switching shaft 10, wherein the Ausschaltenergiespeicher 14 is relaxed and the double-armed lever 17 is in a position in which the first contact piece 22 is disconnected from the second contact 23.

FIG. 2 shows the circuit breaker in a closed switching position in which the first contact 22 and the second contact 23 communicate with each other. By triggering a release mechanism, not shown, the switching energy storage 2 transmits the energy by means of the eccentric 4 and the clamping shaft 5 on the cam 6, which performs a counterclockwise rotation about its axis of rotation 7. Upon rotation of the cam 6 is about the cam member 9 the switching shaft 10 is moved to rotate counterclockwise about its axis of rotation 11. The rotation of the shift shaft 10 leads to a movement of the driver 12 in the counterclockwise direction, whereby the two-armed lever 17 pivotally connected to the Ausschaltenergiespeicher 14 is also rotated counterclockwise about its axis of rotation 19. In this case, the first end 18 of the double-armed lever 17 moves down and the second end 20 upwards. By this movement, the first contact piece 22 is pressed against the second contact piece 23, the contact of the pole mechanism 21 is closed. Furthermore, in the movement of the driver 12 of the Ausschaltenergiespeicher 14 is tensioned. FIG. 2 shows the position of the switched-on circuit breaker 1, in which a kinematic chain of switch shaft 10 and Ausschaltenergiespeicher 14 are almost fixed in an extended position, ie an axis from the first end 13 of the Ausschaltenergiespeichers 14 to the second end 15 of the Ausschaltergiespeichers 14 is at an angle of almost 180 degrees to an axis from the driver 12 to the axis of rotation 11 of the shift shaft 10th

Due to the arrangement of the kinematic chain of switch shaft 10 and Ausschaltenergiespeicher 14 almost in an extended position, only a small torque generated by the Ausschaltenergiespeicher 14 acts on the shift shaft 10 so that they in the in FIG. 2 shown position can be fixed by a simple, not shown latch mechanism.

When the switching shaft 10 is fixed, by means of a drive device which is connected via a gear with the clamping shaft 5 and thus with the cam 6 and the switching energy storage 2, a renewed clamping operation for the switching energy storage 2 done. By the drive, the cam 6 is caused to rotate further counterclockwise, the outer surface 8 of the cam 6th no longer in contact with the cam member 9 of the switching shaft 10 is. The shift shaft 10, which is fixed by the latch mechanism, remains in the position of FIG. 2 so that the contact pieces 22 and 23 remain in contact with each other. The drive causes via the connection 5 at the same time a clamping of the switch-on energy storage 2.

If the latch mechanism for fixing the shift shaft is released, the torque generated by the Ausschaltenergiespeicher 14 is sufficient to rotate the not with the cam 6 in contact switching shaft 10 in a clockwise direction about its axis of rotation 11, wherein by the spring force of the Ausschaltenergiespeichers a rotation of the two-armed Lever 17 is effected in a clockwise direction and the first contact piece 22 is separated from the second contact piece 23. The circuit breaker 1 is again in a position, as shown in Figure 1, with a tensioned switch energy storage 2 and separate contacts 22, 23rd

FIG. 3 shows a switch-on energy storage device with a spring element 2 as a switch-on energy storage 2, which is connected at a first end 24 by means of a latch assembly 25 with the mounting part 3 and at a second end 27 hingedly connected to the eccentric 4. The eccentric 4 and the cam 6 are fixedly arranged on the clamping shaft 5. The guide member 28 is rigidly connected to the second end 27 and by means of an axis 31 which extends through the slot 29 on the attachment part. 3 stored. The pawl assembly 25 includes a likewise rotatably mounted on the axis 31 pawl 32 and a spring 33 which is secured at its first end 34 to the pawl 32 and at its second end 35 on the fastening part 3. The dashed Line 38 shown corresponds to the trajectory of the second end 27 and the dashed line 39 of the path of movement of the stop element 30 in a switching or clamping operation of the power switch memory. Due to the kinematic arrangement of the system, the movement path 39 is characterized in that, during the movement of the stop element 30, a different trajectory is swept from an upper to a lower dead center of the starting energy storage device than in the unconverted movement, whereby the latching with the detent 32 is made possible becomes.

In FIG. 3 the turn-on energy storage is in a tensioned state, wherein the spring element is under compressive stress. The second end 27 is at the upper reversal point of its trajectory curve 38, the stop member 30 is located near the upper knee point of its trajectory 39, and the axis 31 is located at the lower stop of the slot 29 of the guide member 28. The pawl 32 is by the tensile force of the spring 33 held in a first position.

If a switching operation is triggered, the energy stored in the switch-on energy store 2 is transmitted via the eccentric 4 and the clamping shaft 5 to the cam 6 and thereby to the switching shaft 10. In this case, the second end 27 moves along the line 38 in the counterclockwise direction and the stop member 30 on the line 39 in a clockwise direction.

FIG. 4 shows the switch-on energy storage 2 with the latch mechanism in a position shortly after the triggering of a switching operation, wherein the switch-on energy storage 2 has partially relaxed. The energy of the switch-on energy storage 2 leads to the rotation of the cam 6 via the clamping shaft 5 and thus to a movement of the switch shaft 10. The second end 27 is in a 9 o'clock position on the line 38 while the abutment member 30 has moved down the line 39. The axis 31 is located relative to the slot 29 due to the movement of the guide member 28 connected to the second end 27 in a position close to the second end of the slot 29th

FIG. 5 shows the turn-on energy storage 2 in a fully relaxed state in which the second end 27 and the stop member 30 have reached the lower reversal points of the respective lines 38 and 39. In this position, the axis 31 is located at the upper end of the slot 29. The stop element 30 is located on the pawl 32 in a clamping recess 36 at. In this position, the stop member 30 begins to move the rotatably mounted pawl 32 against the spring force of the spring 33 from the mounting part 3, wherein the spring 33 is tensioned.

FIG. 6 shows the position of the switch-on energy storage 2 and the latch mechanism directly after the switching operation of the circuit breaker. The cam 6 is not in contact with the switching shaft 10, the switching shaft 10 and thus the contacts of the circuit breaker are in a locked and on position. Due to the energy of the switch-on energy store 2, which is partly converted into kinetic energy during the switching process, the cam 6 and the eccentric 4 rotate beyond their reversal points, the guide element 28 moving upwards and the stop element 30 leaving the clamping recess 36 of the pawl 32. At this moment, the pawl 32 is moved back by the tensile force of the spring 33 in its first position. By further rotation of the eccentric 4 of the switch-on energy storage 2 is partially stretched, causing the switch-on energy storage 2 performs a return movement. This return movement is determined by the the spring 33 is limited to its first position moved back pawl 32, as with respect to the FIG. 7 explained.

FIG. 7 shows the position of the switch-on energy storage 2 and the latch mechanism after the switching operation of the circuit breaker with latched stop member 30. The stop member 30 engages in the locking recess 37 of the pawl 32 and is locked. By this locking a further return of the turn-on energy storage 2 is reliably prevented. This can immediately switch off the circuit breaker immediately and take place a new clamping operation for the switch energy storage.

FIG. 8 shows a clamping device for the switching energy storage 2 in a schematic side view. The device comprises a clamping shaft 5, at the first end 40 of the eccentric 4 is arranged. At the second end 41 of the tensioning shaft 5, the cam 6 is fixedly connected to the tensioning shaft 5. On a housing part 42 of the clamping device, in which the clamping shaft 5 is rotatably supported by ball bearings 42a, 42b, a stop element 43 is fixedly arranged. With the clamping shaft 5 is fixedly connected to a driver 44 which cooperates via a pawl 45 with a drive wheel 46. The pawl 45 is rotatably arranged by means of a spring element 47 on the drive wheel 46. The drive wheel 46 is the last drive wheel of a transmission, not shown, for example, a worm gear which is driven by means of a hand crank or a motor drive. On the eccentric 4 of the switch-on energy storage 2 is arranged articulated. A trigger stop 49 is provided as a stop for the clamping device after a clamping operation, wherein the trigger stop by means of a with respect to the FIGS. 11 to 13 described mechanism can be triggered to to perform a switching operation of the circuit breaker with the switching power storage 2 stretched.

FIG. 9 shows a front view of the clamping device according to the invention in a position during the clamping operation of the switch-on energy storage. The pawl 45 is at its end 50 via the contact surface 51 with the driver 44 in contact. At the end 50 of the pawl 45, a stop 52 is formed, which bears against a drive pin 46 on a position pin 53. By a brought about via the drive rotation of the drive wheel 46, the clamping shaft 5 and thus the eccentric 4 is offset by the voltage applied to the driver 44 pawl 45 in a clockwise direction. As a result, the pivotally mounted on the eccentric 4 Einschaltergiespeicher 2 is stretched. In the position of FIG. 9 the eccentric 4 is in a position in which the switching energy storage 2 is below its maximum compression spring tension. In order to produce a torque necessary for triggering a switching operation, the eccentric 4 must be turned further into a position deviating by a few degrees from this maximum stretch position.

In FIG. 10 the position of the pawl 45 is shown after a fully executed clamping operation of the switch-on energy storage 2. Upon rotation of the drive wheel 46 in the clockwise direction, the pawl 45 comes into contact with the stop member 43, whereby a rotation of the pawl 45 is triggered about the axis 48 in the counterclockwise direction, so that the contact surface 51 is no longer applied to the driver 44 and the pawl from the driver 44 has swung away. The clamping shaft 5 is decoupled in this position from the drive wheel 46 and thus from the drive. By a further rotation of the drive wheel 46 thus no force is exerted on the cam or the eccentric more.

During a switch-on operation, the release stop 49 is released, so that the energy stored in the switch-on energy store 2 is used to rotate the cam disk 6 connected to the clamping shaft 5 and thus to close the movable contact of the circuit breaker. In this case, the clamping shaft 5 and the parts connected to it in the direction of arrow 54 rotates FIG. 10 until the turn-on energy storage 2 is completely relaxed. The drive wheel 46 with the pawl 45 remains in the position of FIG. 10 , As a result, no energy is transferred to the drive wheel and the drive during the switching process. If a new clamping operation is carried out after the switching operation, the drive wheel 46 is likewise moved in the direction of the arrow 54 via the drive. The pawl is thereby further deflected on the stop element 43 and moves along it until, due to the rotation of the drive wheel 46, the pawl 45 is no longer in contact with the stop element 46 and is rotated in the direction of the tensioning shaft 5 by the force exerted by the spring element 47 until the pawl 45 abuts the position pin 53. By the position pin 53 prevents the pawl 45 rests on the clamping shaft 5 during the further rotational movement of the drive wheel 46. Due to the further rotational movement, the pawl 45 comes into contact with the driver 44, so that the drive wheel 46 and the clamping shaft 5 are coupled again and the switch-on energy storage 2 is stretched again.

FIG. 11 shows an embodiment of a locking mechanism 55 in a schematic representation. The locking mechanism 55 has a pushbutton 56 which rests with its pin extension 57 on a force transmission element 58. The power transmission element 58 has a guide frame 59 in which a displacement member 60 is movably guided in a linear direction of movement. Of the Guide frame 59 is movably held about a stationary pivot bearing 61 and connected to a bearing 62 with a pivot lever 63.

The power transmission element 58 is located in the in FIG. 11 shown unlocking position with its longitudinally movable displacement element on a discharge trigger 64, which releases upon actuation, ie by initiating a pushing movement in the arrow direction shown in the discharge trigger 64, a locking of the figuratively not shown switch-on energy storage 2, whereby the reference to the Fig. 8 described release stop 49 is released, so that the turn-on energy storage 2 discharges.

The switch-on energy storage 2 is mechanically in the embodiment shown with the switching shaft 10 of the circuit breaker FIG. 1 coupled. The introduction of a rotational movement in the switching shaft 10 transfers the contacts of the circuit breaker from a contact position in which the switch contacts of the switch abut each other, in a disconnected position in which the contacts of the switch are separated or from the disconnected position to the contact position, as already with Respect to the FIGS. 1 and 2 described.

The shift shaft 10 is pivotally connected to the cam member 9 at a bearing 66 with a drive pivot lever 67. The drive pivot lever 67 has at its end facing away from the bearing 66 an elongated hole 68, into which a driving pin 69 of an angle lever 70 extends, which is movable about a stationary pivot bearing 71 around. The angle lever 70 is pivotally connected at its bearing 72 with the pivot lever 63. At the return spring bearing 73, the angle lever 70 is further coupled to a return spring 74, which in the shown Position the driver 69 of the angle lever 70 at the upper end of the elongated hole 68 holds. The upper boundary of the elongated hole 68 thus forms a kind of abutment.

FIG. 12 shows the locking mechanism according to FIG. 11 in a locking position, in which the circuit breaker is displaced on a slot with separation of contacts of a circuit breaker. By way of derogation, the angle lever 70 is coupled to the drive shaft of a separate disconnector or subswitch, not shown. Of course, both variants can be realized together within the scope of the invention.

The movement, which is necessarily introduced, for example, for the displacement of the switch on the insertion guide, is effected via an in FIG. 12 not shown lever mechanism introduced into the angle lever 70, which then moves in the direction of arrow 75 shown. The lever mechanism is linked, for example, with a bearing 76 of the angle lever 70. Due to the connection of the angle lever 70 with the power transmission element 58 via the pivot lever 63, the power transmission element 58 is given away in a direction indicated by the arrow 77. The direction of movement of the displacement element 60 of the force transmission element 58 is thus aligned at an angle and to the direction of movement of the pushbutton 56, in which the pin extension 57 of the pushbutton 56 extends. In this way, the switch-on movement of the pushbutton 56 can no longer be transferred to the discharge trigger 64, so that discharge of the switch-on energy store 2 is rendered impossible.

FIG. 13 shows the locking mechanism according to FIG. 11 in a further unlocked position, wherein the unlocked position brought about by a movement of the switching shaft 10 has been. Rotation of the selector shaft 10 causes the cam member 9 to rotate in the arrow direction 78 shown, and thus offset the drive pivot lever 67 downward. The protruding into the slot 68 of the drive pivot lever 67 driver 69 of the angle lever 70 is also moved in this way down, so that the angle lever 70 is pivoted in the direction of arrow 79 shown. Due to the lever connection 63 between the guide frame 59 and the angle lever 70, the force transmission element 58 is also pivoted in the direction of the arrow 77. By rotating the switching shaft 10 thus not only the switching contacts of the switch poles of the switch, but also a locking position of the locking mechanism have been brought about, in which a relaxing of the not shown switch energy storage 2 by pressing the push button 56 is prevented.

A power-on indicator, not shown in the figure, can be arranged on the locking mechanism 55, for example on the guide frame 58. By connecting such a display unit to the guide frame 58, the state of the circuit breaker can be directly indicated by the different positions of the guide frame 58.

LIST OF REFERENCE NUMBERS

1

breakers

2

switch-

3

attachment portion

4

eccentric

5

clamping shaft

6

cam

7

axis of rotation

8th

outer surface

9

cam member

10

shift shaft

11

axis of rotation

12

takeaway

13

First end

14

Ausschaltenergiespeicher

15

Second end

16

actuating mechanism

17

Double-armed lever

18

First end

19

axis of rotation

20

Second end

21

pole mechanism

22

First contact

23

Second contact

24

First end of the turn-on energy storage

25

latch assembly

27

Second end

28

guide part

29

Long hole

30

stop element

31

axis

32

pawl

33

feather

34

First end spring

35

Second end spring

36

tensioning cutout

37

locking recess

38

Trajectory second end

39

Trajectory stop element

40

First end

41

Second end

42

housing part

43

Fixed stop element

44

takeaway

45

pawl

46

drive wheel

47

spring element

48

axis

49

trigger stop

50

End latch

51

contact area

52

attack

53

positioning pin

54

arrow

55

locking mechanism

56

Pushbutton 56

57

pin extension

58

Power transmission element

59

guide frame

60

displacement member

61

pivot bearing

62

camp

63

pivoting lever

64

discharge triggering

66

camp

67

Swing gear lever

68

Long hole

69

Carrier pin

70

bell crank

71

Pivot bearing 71

72

Warehouse 72

73

Rückholfederlager

74

return spring

75

arrow

76

camp

77

arrow

78

arrow

79

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Claims (25)

1. Circuit breaker (1) with at least one pole arrangement (21), which comprises a movable contact (22), with a rotatably mounted twin-armed lever (17) for opening and closing the movable contact (22), a switch-on energy store (2), and with a cam disk (6), which is coupled to the switch-on energy store (2) and, via an actuating element (10), to a first end (18) of the lever (17), the second end (20) of the lever (17) being connected to the movable contact piece (22) of the pole arrangement (21), and with at least one switch-off energy store (14), characterized in that the actuating element (10) is a rotatably mounted switching shaft (10), which can be controlled by the cam disk (6) and is connected to the first end (18) of the twin-armed lever (17) via the switch-off energy store (14).
2. Circuit breaker according to Claim 1, characterized in that, in the case of a multi-pole pole arrangement, the switching shaft (10) extends over the entire pole arrangement and has a driver (12) for each movable contact, on which driver a first end (13) of the respective switch-off energy store (14) is arranged in articulated fashion.
3. Circuit breaker according to Claim 2, characterized in that the switch-off energy store (14) is connected at a second end (15) to the first end (18) of the twin-armed lever (17) in articulated fashion.
4. Circuit breaker according to one of Claims 1 to 3,
   characterized in that the switch-off energy store (14) comprises a spring element.
5. Circuit breaker according to one of the preceding claims, characterized in that the switch-on energy store (2) comprises a spring element, which is mounted at a first end on a housing part (3) and is coupled at a second end to the cam disk (6) via a tensioning shaft (5).
6. Circuit breaker according to one of Claims 1 to 4,
   characterized in that the switch-on energy store (2) is held at a first end (24) and is connected at a second end to the eccentric (4) of a tensioning apparatus, with which return movement-limiting means interact, and the means (25, 28, 31, 32, 33) have a catch mechanism (25), which is arranged at the first end (24) of the switch-on energy store (2).
7. Circuit breaker according to Claim 6, characterized in that the means (25, 28, 31, 32, 33) contain a guide part (28), which triggers the catch mechanism (25), with which the first end (24) of the switch-on energy store (2) is mounted movably on a fixed spindle (31) by means of a slot (29) formed in the guide part (28), and which is connected to the second end (27) of the switch-on energy store (2).
8. Circuit breaker according to Claim 7, characterized in that the catch mechanism (25) has a catch (32), which is capable of moving rotatably about the fixed spindle (31) between a first and a second position and on which a spring element (33) acts.
9. Circuit breaker according to Claim 8, characterized in that the fixed spindle (31) and the spring element (33) are held on a fastening element (3).
10. Circuit breaker according to Claim 8 or 9, characterized in that a stop element (30), which interacts with a tensioning cutout (36) on the catch (32), is provided on the guide part (28).
11. Circuit breaker according to Claim 10, characterized in that the catch (32) has a checking cutout (37).
12. Circuit breaker according to one of Claims 6 to 11, characterized in that, in the tensioning apparatus for the switch-on energy store (2),

    - a tensioning shaft (5), which can be rotated by means of a drive wheel (46), for tensioning the switch-on energy store (2) is fixedly connected in each case to an eccentric (4) and to a cam disk (6),

    - which has a triggering stop (49), and

    - in which the drive wheel (46) is coupled to the tensioning shaft (5) via a clutch (43, 44, 45, 47, 48, 53), and

    - the clutch (43, 44, 45, 47, 48, 53) is a catch arrangement (43, 44, 45, 47, 48, 49).
13. Circuit breaker according to Claim 12, characterized in that

    - the catch arrangement (43, 44, 45, 47, 48, 53) has a catch (45), which is arranged rotatably on the drive wheel (46), and

    - a fixed stop element (43) for controlling the catch (45) is provided.
14. Circuit breaker according to Claim 13, characterized in that the fixed stop element (43) is arranged in such a way that, when the switch-on energy store (2) is tensioned, the catch (45) releases the tensioning shaft (5).
15. Circuit breaker according to Claim 14, characterized in that the catch arrangement (43, 44, 45, 47, 48, 53) has a driver (44), which is fixedly connected to the tensioning shaft (5) and interacts with the catch (45).
16. Circuit breaker according to Claim 15, characterized in that the catch arrangement (43, 44, 45, 47, 48, 53) has a spring element (47).
17. Circuit breaker according to Claim 16, characterized in that a positioning pin (53) is provided on the drive wheel (46).
18. Circuit breaker according to one of the preceding claims, characterized in that a locking mechanism (55) for preventing the discharge of the switch-on energy store is provided, with a pushbutton (56), which, in an unlocking position of the locking mechanism (55), is coupled by means of a force transmission element (58) to a discharge triggering device (64) for discharging the switch-on energy store (2) via an interlocking connection, with the result that a switch-on movement acting on the pushbutton (56) can be introduced into the discharge triggering device (64) for relieving the tension on the switch-on energy store (2) via the force transmission element (58), the force transmission element (58) being connected to interlocking-connection interruption means (63, 70), which are designed to move the locking mechanism (55) over into a locking position, in which the interlocking connection is cancelled, the pushbutton (56) and the force transmission element (58) being guided movably in the unlocking position in a common longitudinal direction, with the result that a thrusting movement of the pushbutton (56) can be introduced into the switch-on triggering device (64) via a longitudinal movement of the force transmission element (58), the force transmission element (58) being mounted in such a way that it can swivel, with the result that, in a locking position, a movement direction of the force transmission element (58) is aligned at an angle to the thrusting movement of the pushbutton (56), the interlocking-connection interruption means (63, 70) being coupled to the switching shaft (10) of the circuit breaker and/or to a secondary switch.
19. Circuit breaker according to Claim 18, characterized in that the interlocking-connection interruption means have an angle lever (70), which is articulated on a pivot, which is fixed in position, and is coupled to a restoring spring (74) at a restoring bearing (73) and is coupled to the force transmission element at a connecting bearing (72) by means of a swiveling lever (63).
20. Circuit breaker according to Claim 19, characterized in that the angle lever (70) is coupled to a switching shaft of the secondary switch by means of lever kinematics in such a way that, if the secondary switch is in a disconnecting position, the angle lever (70) is swiveled counter to the spring force of the restoring spring (74) and the force transmission element (58) is moved over from the unlocking position into the locking position.
21. Circuit breaker according to Claim 19 or 20, characterized in that the angle lever (70) is coupled to a withdrawable-part lock of a withdrawable part by means of lever kinematics in such a way that, if the switch is displaced on the withdrawable part, the angle lever is swiveled counter to the spring force of the restoring spring (74) and the force transmission element (58) is moved over from the unlocking position into the locking position.
22. Circuit breaker according to Claim 19 or 20, characterized in that the angle lever (70) has a driver pin (69), which extends in a slot (68) of a drive lever (67), the drive lever (67) at its end remote from the slot (68) being fastened on a cam element (9) of the switching shaft (10), with the result that, in a switch-position of the switching shaft (10), the angle lever (70) is swiveled so as to cancel the interlocking connection between the pushbutton (56) and the discharge triggering device (64).
23. Circuit breaker according to one of Claims 18 to 22, characterized in that the locking mechanism, which can be switched between a locking position, in which the triggering of a switch-on operation with the contacts of the circuit breaker coming into contact with one another is prevented, and an unlocking position, in which the triggering of the switch-on operation is enabled, is linked to a switch-on readiness indicator, and in that the switch-on readiness indicator is arranged on the switch in such a way that it can be perceived visually.
24. Switch according to Claim 23, characterized in that the switch-on readiness indicator is mechanical.
25. Switch according to Claim 23, characterized in that the switch-on readiness indicator is realized optically.

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