CN118553546A - Breaking mechanism for switchgear and switchgear - Google Patents

Abstract

A breaking mechanism for a switchgear and a switchgear. The breaking mechanism comprises: a housing; a drive disk pivotably provided on the housing; the first micro switch is connected in a control circuit of the motor and drives the motor to operate when being excited; the second micro switch is connected in the control circuit of the motor and is used for switching the running direction of the motor when being excited; a first actuator pivotably disposed on the housing and configured to move between a first state in which the first actuator actuates the first microswitch and a second state in which the first actuator does not actuate the first microswitch when driven by the drive disk during pivoting of the drive disk; and a second actuating member pivotally disposed on the housing and configured to move between a third state in which the second actuating member actuates the second micro switch and a fourth state in which the second actuating member does not actuate the second micro switch when driven by the drive plate during pivoting of the drive plate.

Description

Breaking mechanism for switchgear and switchgear

Technical Field

The present invention relates to a breaking mechanism for a switching device, such as a fusion switch, an electric disconnector, a double-power transfer switch, or the like, and a switching device.

Background

In a switching device such as a fusion switch, a dc motor is an indispensable power provider for a breaking mechanism of the switching device, and the operation of the switching device is a round trip operation from "on" to "off" and then from "off" to "on". Thus, the motor is required to provide corresponding forward and reverse rotation functions, and the forward and reverse rotation should correspond to the state (on/off) of the switch, so that the control of the mechanism is generally complicated. The electromagnet is a power provider that releases the breaking mechanism when it is locked. Because the control section involves motor start, run, stop and commutation, and electromagnet energization drive mechanism lock release control, for both reasons described above, PCBA is commonly used as such a control circuit, which typically contains PCBA, and a microswitch is used to sense the desired mechanism position state of the PCBA. Thus, the cost is high.

Disclosure of Invention

Therefore, the application provides a breaking mechanism, which can automatically commutate and stop a DC motor to start, operate, stop and commutate the motor without complex PCBA.

The application provides a breaking mechanism for a switchgear, comprising: a housing; the driving disc is pivotally arranged on the shell and can pivot under the driving of the motor, so that the moving contact is pivoted between a contact position and a separation position with the fixed contact; a mechanism energy storage configured to provide a force to continue rotation of the drive disk after the drive disk passes through the dead point position; the first micro switch is connected in a control circuit of the motor and is configured to drive the motor to operate when being excited; the second micro switch is connected in the control circuit of the motor and is configured to switch the running direction of the motor when being excited; a first actuator pivotably disposed on the housing and configured to move between a first state in which the first actuator actuates the first microswitch and a second state in which the first actuator does not actuate the first microswitch when driven by the drive disk during pivoting of the drive disk; a second actuator pivotally disposed on the housing and configured to move between a third state, in which the second actuator actuates the second microswitch, and a fourth state, in which the second actuator does not actuate the second microswitch,

During the switching of the switch device from the opening state to the closing state, the motor is operated under the excitation of the external switch, so that the driving disc is pivoted in the first direction, the first actuating member is moved from the second state to the first state under the driving of the driving disc, the first micro-switch is excited, after the driving disc passes through the dead point position, the first actuating member is moved from the first state to the second state under the driving of the driving disc, the motor is stopped, and finally the moving contact reaches the contact position,

During switching of the switch equipment from the closing state to the opening state, the second actuating piece moves from the fourth state to the third state under the driving of the driving disc, so that the motor is turned, the first actuating piece moves from the second state to the first state under the driving of the driving disc, the first micro switch is excited, the driving disc reversely rotates under the driving of the motor, and finally the moving contact reaches the separation position.

Advantageously, the switching device further comprises a first pressing member provided on the driving disc, the first pressing member being configured to press the first actuating member with the pivoting of the driving disc to move the first actuating member from the second state to the first state when the switching device is switched from the open state to the closed state.

Advantageously, when the switching device is switched from the open state to the closed state, the motor is operated under the excitation of the external switch, causing the driving disc to pivot in the first direction, and after the first pressing member presses the first actuating member to move from the second state to the first state, the external switch stops the excitation of the motor, and the motor continues to operate under the excitation of the first micro-switch, thereby causing the driving disc to continue to pivot in the first direction.

Advantageously, the drive device further comprises a second abutment provided on the drive disc, the second abutment being configured to abut against the first actuator to move it from the first state to the second state upon pivoting of the drive disc in the first direction, thereby stopping the motor, when the drive disc has been pivoted past the dead point position, such that the drive disc continues to pivot in the first direction and eventually the moving contact reaches a contact position in contact with the stationary contact.

Advantageously, a third abutment provided on the drive disc is also included, the third abutment being configured to abut against the second actuator to move it from the fourth state to the third state after the drive disc has pivoted past the dead-centre position, in order to switch the direction of operation of the motor.

Advantageously, the driving device further comprises a fourth pressing member disposed on the driving disc, and after the driving disc continues to pivot in the first direction to enable the moving contact to reach the contact position, the fourth pressing member is configured to press the first actuating member to move from the second state to the first state, so as to activate the first micro switch to enable the motor to reversely operate, and further enable the driving disc to pivot in a second direction opposite to the first direction.

Advantageously, there is a lost motion between the moving contact and the drive disc, such that the moving contact remains in the contact position when the drive disc starts to pivot in the second direction.

Advantageously, during pivoting of the drive disc in the second direction, the shape of the second abutment and the shape of the first actuation member are configured such that the second abutment is able to pass over the first actuation member without changing the position of the first actuation member.

Advantageously, the first actuating member has a tilt structure along which the second abutment member pivots during pivoting of the drive disc in the second direction, so as to pass over the first actuating member.

Advantageously, the drive device further comprises a fifth abutment provided on the drive disc, the fifth abutment being configured to abut against the first actuator to move from the first state to the second state during continued pivoting of the drive disc in the second direction, thereby stopping the motor, while the drive disc passes the dead point position, the sixth abutment provided on the drive disc abutting against the second actuator to move from the third state to the fourth state.

Advantageously, after the drive disk passes the dead point position, the drive disk starts to drive the moving contact and eventually brings the moving contact to a separated position separated from the stationary contact.

Advantageously, it further comprises: and one end of the closing release piece is pivotally arranged on the shell and is configured to pivot between a closing release position and a closing blocking position, in the closing release position, the closing release piece does not block the driving disc from pivoting along the first direction so as to allow the driving disc to pivot along the first direction to drive the moving contact to reach the contact position, and when the driving disc passes through the dead point position, the driving disc is blocked by the closing release piece, so that the driving disc cannot continue to pivot along the first direction.

Advantageously, an electromagnet is also included, operatively coupled to the closing trip member, can enable the closing release fastener to pivot from a closing blocking position to a closing releasing position when being excited, after excitation is lost, the closing release piece can return to the closing blocking position from the closing release position under the action of a reset spring.

Advantageously, the device further comprises a blocking member arranged on the driving disc, and the blocking member is blocked by the closing release member at the closing blocking position of the closing release member.

Advantageously, it further comprises: the brake release member is configured to be capable of pivoting between a brake release position and a brake release blocking position, in the brake release position, the brake release member does not block the pivot of the driving disc in the second direction, so that the driving disc is allowed to pivot in the second direction to drive the moving contact to reach the separation position, and when the driving disc passes through the dead point position, the driving disc is blocked by the brake release member, so that the driving disc cannot continue to pivot in the second direction.

Advantageously, when the electromagnet drives the closing trip member to pivot, the closing trip member also drives the opening trip member to pivot together.

Advantageously, the other end of the opening release member is movably mounted to the closing release member, the opening release member having a further pivot point between one end and the other end, the blocking member pushing the opening release member such that the opening release member pivots about the further pivot point when the drive plate pivots in the first direction but does not reach the dead point position, such that the opening release member does not block the pivoting of the drive plate in the first direction.

Advantageously, the first actuator and the second actuator are arranged to be pivotable about the same pivot point.

Advantageously, the actuator further comprises a seventh abutment provided on the drive disc, the seventh abutment being configured to abut against the first actuator to move from the first state to the second state as the drive disc is pivoted in the first direction, thereby stopping the motor, while the seventh abutment abuts against the second actuator to pivot the second actuator from the fourth state to the third state to energize the second microswitch to enable the motor to operate in reverse, at which time the drive disc is pivoted past the dead point position such that the drive disc continues to pivot in the first direction and eventually the movable contact reaches a contact position in contact with the stationary contact.

Advantageously, the device further comprises an eighth pressing member disposed on the driving disc, and when the driving disc continues to pivot in the first direction and the moving contact reaches the contact position, the eighth pressing member is configured to press the first actuating member to move from the second state to the first state, so as to activate the first micro switch to make the motor reversely run, and further drive the driving disc to pivot in a second direction opposite to the first direction.

Advantageously, during the continued pivoting of the drive disc in the second direction, the seventh abutment is configured to abut against the first actuation member to move it from the first state to the second state, thereby stopping the motor, while the seventh abutment abuts against the second actuation member to pivot the second actuation member from the third state to the fourth state to deactivate the second microswitch, at which time the drive disc is pivoted past the dead point position such that the drive disc continues to pivot in the second direction and eventually the moving contact reaches the separated position in contact with the stationary contact.

The application also provides a switching device comprising a breaking mechanism as described above.

Drawings

The advantages and objects of the present invention will be better understood in the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings. To better illustrate the relationship of the various components in the figures, the figures are not drawn to scale.

Fig. 1 shows a plan view of a breaking mechanism according to the invention, in which the switching device is in a breaking state.

Fig. 2 is a plan view showing a state in which a driving disc of the breaking mechanism is pivoted in a first direction when the breaking mechanism is switched from a breaking state to a closing state, so that a first pressing member on the driving disc presses against a first actuating member, and a first micro switch is excited.

Fig. 3 shows a plan view of the drive disc of the breaking mechanism pivoted in a first direction into abutment of the blocking member with the breaking release.

Fig. 4 shows an enlarged view of the blocking member abutting the opening release member of fig. 3.

Fig. 5 shows a plan view of the blocking member pivoting the opening release as the drive plate pivots in a first direction.

Fig. 6 shows an enlarged view of the blocking member of fig. 5 being pivoted to the opening trip.

Fig. 7 shows a plan view after the blocking member has moved past the brake release member and the second abutment on the drive disc has begun to abut the first actuating member.

Fig. 8 shows an enlarged view of the second pressing member of fig. 7 when it starts to press against the first actuating member.

Fig. 9 shows a plan view of the second pressing member pressing against the first actuating member, thereby deactivating the first micro switch.

Fig. 10 shows a plan view of the blocking member blocked by the closing release member, at which the switching device is in a ready-to-close state and the driving disc passes through the dead point position, and a third pressing member on the driving disc presses against the second actuating member, so that the second micro switch is activated.

Fig. 11 is a plan view showing the electromagnet pulling the closing release catch to the closing release position such that the drive disc continues to pivot in the first direction past the dead point position.

Fig. 12 shows an enlarged view of the closing and opening release together pulled by the electromagnet.

Fig. 13 shows a plan view of the closing trip member driving the opening trip member to reset together under the action of the reset spring, and the driving disc finally driving the moving contact to reach the contact position, so that the fourth pressing member on the driving disc presses the first actuating member, thereby enabling the first micro switch to be excited, at this time, the motor is operated reversely, and the driving disc pivots along a second direction opposite to the first direction.

Fig. 14 shows a plan view of the drive plate pivoted in a second direction such that the second abutment is passing over the first actuation member and the blocking member is pivoting against the brake release member.

Fig. 15 shows an enlarged view of the second abutment being passed over the first actuation member.

Fig. 16 shows a plan view of the second abutment having passed over the first actuation member, the blocking member pivoting past the closing release catch.

Fig. 17 shows a plan view of the fifth pressing member when it starts pressing against the first actuating member.

Fig. 18 shows an enlarged view of the fifth pressing member when it starts pressing against the first actuating member.

Fig. 19 shows a plan view of the fifth pressing member pressing the first actuating member to change its position, and the first micro switch being deactivated, at which time the blocking member is blocked by the opening/closing release member, the switching device is in the ready-to-open state, and the sixth pressing member pressing the second actuating member, so that the second micro switch is deactivated.

Fig. 20 is a plan view showing that the electromagnet pulls the closing trip member to drive the opening trip member to move to the opening release position, so that the driving disc can continue to pivot in the second direction.

Fig. 21 shows a plan view of the closing and opening release members being reset by the reset spring.

Fig. 22 shows a plan view of the drive disk continuing to pivot in the second direction, so that the movable contact reaches the separated position.

Fig. 23 shows a plan view of a breaking mechanism according to another embodiment, when the switching device is in a breaking state.

Fig. 24 is a plan view showing a case where the drive plate of the breaking mechanism is pivoted in the first direction when the switch is switched from the open state to the closed state, so that the first pressing member on the drive plate presses the first actuating member, thereby activating the first micro switch.

Fig. 25 shows a plan view of the drive disc of the breaking mechanism pivoted in a first direction into abutment of the blocking member with the breaking release in another embodiment.

Fig. 26 shows a plan view of the blocking member pivoting the opening release member as the drive plate pivots in the first direction, in which case the second pressing member simultaneously presses the first actuating member and the second actuating member, causing the second actuating member to actuate the second micro switch.

Fig. 27 shows a plan view of the blocking member blocked by the closing release catch in another embodiment, when the switching device is in a ready-to-close state and the drive disc passes the dead point position.

Fig. 28 shows a plan view of an electromagnet energized to pull a closing release fastener in another embodiment.

Fig. 29 shows that in another embodiment the drive disc continues to rotate such that the moving contact reaches the contact position, the switching device being in a closed state.

Fig. 30 to 36 show a process of switching the switching device from the closed state to the open state in another embodiment.

Fig. 37 shows a perspective view of the first actuating member, the second actuating member, the first micro switch, the second micro switch of the breaking mechanism in another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the specific embodiments of the present disclosure. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Possible implementations within the scope of the present disclosure may have fewer components, have other components not shown in the drawings, different components, differently arranged components, differently connected components, etc., than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Where the number of components is not specified, the number of components may be one or more; likewise, the terms "a," "an," "the," and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "mounted," "configured," "connected," or "connected" and the like are not limited to physical or mechanical mounting, configuration, connection, but may include electrical mounting, configuration, connection, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships when the apparatus is in use or positional relationships shown in the drawings, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly.

Fig. 1 shows a plan view of a breaking mechanism of a switching device according to the invention in a breaking state. The breaking mechanism includes a housing H, a drive disk 1 pivotably provided on the housing H, a first actuator 2 and a second actuator 3 pivotably provided on the housing. The drive disc 1 is rotatable under the drive of a motor (not shown). The first micro switch 4 and the second micro switch 5 are provided on the housing and electrically connected to a control circuit of the motor. The first actuator 2 is capable of being driven by the drive plate to pivot between a first state in which the first actuator 2 is capable of activating the first microswitch 4 such that the control circuit controls the motor to operate (e.g. to rotate in a forward direction) and a second state in which the first actuator 2 does not activate the first microswitch 4 such that the control circuit does not control the motor to operate. Similarly, the second actuator 3 is capable of being driven by the drive disk to pivot between a third state in which the second actuator 3 is capable of activating the second microswitch 5 such that the control circuit controls the motor to operate in reverse (e.g., reverse) and a fourth state in which the second actuator 3 does not activate the second microswitch 5 such that the control circuit does not control the motor to operate in reverse.

The breaking mechanism further comprises a closing trip piece 6 and a breaking trip piece 7 which are pivotably arranged on the shell H, and the closing trip piece 6 and the breaking trip piece 7 can pivot around the same pivot point R. As shown in fig. 4, one end of the opening release member is pivotally provided on the housing, the other end is movably mounted to the closing release member 6, and a further pivot point R ' is provided between the one end and the other end of the opening release member, which allows the further pivot point R ' to divide the opening release member into two parts, which parts of the opening release member are pivotable about the further pivot point R ' with respect to the closing release member 6. Between the other end of the release trip 6 and the other pivot point R ', the release trip 6 comprises an elastic member 61, by means of which elastic member 61 the release trip is configured to rest in only two positions (i.e. a blocking position and a release position, described below) around the other pivot point R'.

The closing trip 6 and the opening trip 7 are configured to: when the closing release member 6 pivots about the pivot point R under the actuation of an electromagnet (not shown), the closing release member 6 drives the opening release member 7 to pivot about the pivot point R together, and the opening release member 7 does not pivot relative to the closing release member 6; when the opening release 7 is pressed by a blocking member (described below) on the drive disc to pivot about the other pivot point R ', the closing release 6 does not pivot about the pivot point R, i.e. the opening release 7 pivots about the other pivot point R' with respect to the closing release 6.

The operation of the closing release 6 and the opening release 7 are described in detail below.

Fig. 1 shows a schematic view of the switching device in a switched-off state, in which neither the first microswitch 4 nor the second microswitch 5 is activated. During switching of the switching device from the off state to the on state, an external switch (not shown) is operated to start the motor, which drives the driving disc 1 to pivot in a first direction (clockwise in the drawing), the first pressing member 11 on the driving disc 1 presses the first actuating member 2, so that the first actuating member 2 pivots from the second state to the first state to activate the first micro switch 4, as shown in fig. 2. The first actuator 2 comprises a first elastic member 21, which first elastic member 21 is mounted on the housing at one end and to the first actuator 2 at the other end, by means of which first elastic member 21 the first actuator 2 is configured to stay only in two positions (i.e. a first state and a second state) about its pivot point.

After reaching the state shown in fig. 2, the external switch stops starting the motor, and as the first micro switch 4 is activated, the control circuit of the motor can still drive the motor to run, so that the drive disc continues to pivot in the first direction, although the external switch is stopped. In the state shown in fig. 3, the drive disk 1 is driven such that the blocking member 12 provided on the drive disk 1 presses against the opening trip member 7. As the drive disc 1 continues to pivot, the blocking member 12 on the drive disc 1 moves the trip release member 7 from the trip blocking position (shown in fig. 3 and 4) to the trip release position (shown in fig. 5 and 6). During the switching of the opening state to the closing state, the movement of the opening release 7 from the opening blocking position to the opening releasing position does not affect the switching of the opening state to the closing state, but is used only for the subsequent switching from the closing state to the opening state.

As the drive disk 1 continues to pivot in the first direction, the second pressing piece 13 provided on the drive disk 1 abuts against the first actuating piece 2 as shown in fig. 7 and 8, thereby pivoting the first actuating piece 2 from the first state to the second state as shown in fig. 9. At this point, the first microswitch 4 is deactivated, the motor is deactivated, and the drive disk is about to pivot past a dead-point position, which is the position: before this position, the drive disk is pivoted under the drive of the motor; after passing this position, the drive disk can continue to pivot under the influence of the mechanism energy store (not shown). At this time, the third pressing member 14 provided on the drive disk 1 abuts against the second actuator 3.

After passing the dead point position, the drive disc continues to pivot in the first direction to a state shown in fig. 10 (also referred to as a ready-to-close state). At this time, the closing trip member 6 is in the closing blocking position, and the blocking piece 12 on the driving disc is blocked by the closing trip member 6, specifically, the hook portion 61 of the closing trip member 6, whereby the driving disc cannot continue to pivot in the first direction. At the same time, the third pressing member 14 presses the second actuating member 3 to pivot from the fourth state to the third state, thereby activating the second micro switch 5. The second actuating member 3 comprises a second elastic member 31, which second elastic member 31 is mounted on the housing at one end and to the second actuating member 3 at the other end, by means of which second elastic member 31 the second actuating member 3 is configured to stay only in two positions (i.e. a third state and a fourth state) about its pivot point. The second microswitch 5 is thereby activated, so that the control circuit of the motor runs the motor in reverse at the next run.

In the above description, the motor is described as stopped and then the motor is described as being switched to be capable of reverse operation, but it will be apparent to those skilled in the art that the motor may be switched to be capable of reverse operation and then stopped, or both.

Then, the electromagnet is energized to actuate the closing trip member 6 so that the closing trip member 6 is pivoted to the closing release position, and at the same time, the opening trip member 7 is also pivoted together with the closing trip member 6, as shown in fig. 11 and 12. In the process, the two parts of the opening release 7 are pivoted about the other pivot point R' simultaneously with respect to the closing release 6, so that the position of the opening release 7 with respect to the closing release 6 is restored to the position shown in fig. 4.

Then, the driving disc 1 continues to rotate in the first direction by the action of the main spring of the mechanism to the position shown in fig. 13, at this time, the moving contact is brought to the contact position where it contacts the fixed contact, i.e., the switching device is brought to the closed state, and during the transition from fig. 11 to fig. 13, the fourth pressing member 14 provided on the driving disc 1 presses the first actuating member 2, so that the first actuating member 2 is pivoted from the second state to the first state again, the first micro switch 4 is activated, the motor is started and operated reversely, and the driving disc 1 is caused to rotate in the second direction (counterclockwise direction) opposite to the first direction. In addition, the electromagnet is stopped from being electrified, so that the closing release fastener 6 returns to the closing blocking position under the action of the reset spring, and meanwhile, the opening release fastener also returns to the opening blocking position.

In the case where the switching device is a fusion switch, after reaching the ready-to-close state shown in fig. 10, it may be determined whether the pre-charge main contact of the fusion switch contacts the pre-charge fixed contact, and if it is determined that the pre-charge main contact has contacted the pre-charge fixed contact, the electromagnet may be energized to actuate the closing trip member 6; if it is determined that the pre-charge main contact does not contact the pre-charge stationary contact, the electromagnet does not actuate the closing trip member and the motor may be started with the external switch to run the motor in reverse (as the second microswitch 5 is actuated) thereby rotating the drive disc 1 in a second direction opposite to the first direction, returning the switching device to the open state.

When the closing state shown in fig. 13 is reached, the driving disc 1 rotates in the second direction, but the moving contact still maintains the contact position with the fixed contact, which can be accomplished by setting a "lost motion" or the like for the driving disc 1. This is well known to those skilled in the art and is not of importance herein and is therefore not described herein.

Then, the drive disc 1 continues to rotate in the second direction, the second pressing member 13 on the drive disc 1 can pass over the first actuating member 2, for example, as shown in fig. 15, the first actuating member 2 has an inclined structure 22, so that the second pressing member 13 can move along the inclined structure 22 to pass over the first actuating member without significantly changing the position of the first actuating member. The blocking member 12 abuts against the hook portion 61 of the shutter release member 6 to move it away from the rotational path of the drive plate, as shown in fig. 14.

After the stopper 12 on the driving disc 1 rotates past the hook 61 of the closing trip unit 6, the closing trip unit 6 is reset by the reset spring thereof, as shown in fig. 16. Then, as shown in fig. 17 and 18, the drive disk 1 continues to rotate in the second direction, causing the fifth pressing member 15 provided on the drive disk 1 to press the first actuating member 2, causing the first actuating member 2 to pivot from the first state to the second state, as shown in fig. 19. The fifth abutment 15 is arranged not to abut against the first actuator 2 when the drive disc 1 is rotated in the first direction, which can also be achieved by means of a further tilting feature 23 on the first actuator 2, for example. The other inclined structure 23 has an inclined surface for the fifth pressing member 15 to pass over the first actuating member 2 when the drive disk 1 rotates in the first direction. When the drive disc 1 rotates in the second direction, the inclined surface of the further inclined structure 23 does not face the fifth pressing member 15, but the fifth pressing member 15 presses the further inclined structure 23 and further urges the first actuator 2 to pivot.

During the transition from fig. 17 to 19, the sixth presser 16 provided on the drive disk 1 presses the second actuator 3, pivoting it from the third state to the fourth state, so that the second microswitch 5 is deactivated.

In the state shown in fig. 19, the drive disc 1 rotates past the dead point position, which is understood by those skilled in the art from the above description of the dead point position, i.e. after the rotation past the dead point position, the drive disc 1 can continue to rotate under the influence of the main spring of the mechanism, although the first microswitch 4 is deactivated. At this time, the blocking piece 12 on the drive disk 1 is blocked by the opening release piece 7 (since the opening release piece 7 is located at the blocking position), the state of the switching device may be referred to as a ready-to-open state.

Then, the electromagnet is energized to actuate the closing trip member 6 so that the closing trip member 6 is pivoted to the closing release position, and at the same time, the opening trip member 7 is pivoted together with the closing trip member 6 so that the opening trip member is pivoted to the opening release position, i.e., pivoted away from the rotational path of the blocking member 12, as shown in fig. 20.

Then, the driving disc 1 continues to rotate in the second direction by the mechanism main spring to the position shown in fig. 21, and then the driving disc 1 continues to rotate so that the switching device reaches the switching-off state as shown in fig. 22.

Fig. 23 to the drawings show a breaking mechanism of another embodiment. The other embodiment operates in substantially the same manner as the above embodiment, for example, the opening release catch and the closing release catch operate in substantially the same manner as the above embodiment. This other embodiment differs from the above-described embodiment mainly in the arrangement of the first actuating member, the second actuating member, and therefore, the differences are mainly described below.

In this further embodiment the first actuator 2 and the second actuator 3 pivot about the same pivot point R ", overlapping in a direction perpendicular to the paper surface. In fig. 23, the first actuating member 2 is directed outwards of the page and the second actuating member 3 is directed inwards of the page.

Fig. 23 shows the switching device in the off state, when the motor is operated by the external switch, the motor drives the driving disc 1 to rotate in the first direction, the first pressing member 11 provided on the driving disc 1 presses and urges the first actuating member 2 to pivot in the second direction, so that the first pressing member 11 activates the first micro switch 4, for example, by the contact claw 24 provided on the first pressing member 11, as shown in fig. 24 and 37. At this time, the external switch is stopped, and the first microswitch is moved to the first state, so that the motor continues to operate under the action of the control circuit.

Then, as shown in fig. 25, at this time, the blocking member 12 starts to press against the opening trip member 7, causing the opening trip member 7 to pivot away from the rotational path of the blocking member 12. This is the same as the above embodiment and will not be described again. Fig. 26 shows that the blocking member 12 has rotated past the brake release member 7, at which point a seventh abutment 17 provided on the drive disc 1 abuts and pushes the first actuating member 2, causing the first actuating member 2 to continue to pivot, thereby in turn de-energizing the first microswitch 4, and the motor is stopped. In addition, the seventh pressing member 17 starts to press against and push the second actuating member 3, causing the second actuating member 3 to pivot from the fourth state to the third state, so that the second actuating member excites the second micro switch 5, as shown by circle a in fig. 27. In fig. 27, the blocking member 12 is blocked by the closing release member 6, and at this time, the switching device is in a ready-to-close state.

Next, the electromagnet is energized to pull the closing trip unit 6 away from the rotation path of the blocking member 12, as shown in fig. 28, which is described in the above embodiment and will not be repeated.

As the driving disc 1 continues to rotate in the first direction under the action of the mechanism energy storage member, the moving contact reaches the contact position contacting the fixed contact, at this time, the eighth pressing member 18 provided on the driving disc 1 presses the first actuating member 2, so that the first actuating member 2 further activates the first micro switch, as shown in fig. 29, which causes the motor to start and reverse to operate, so that the driving disc 1 rotates in the second direction, and the first actuating member 2 rotates in the first direction. As the driving disc rotates in the second direction, the blocking member 12 on the driving disc 1 presses and pushes the closing trip member 6, as shown in fig. 30. Fig. 31 shows that the blocking member 12 has rotated past the closing trip member 6 and the closing trip member 6 has been reset under the influence of its return spring.

Then, the drive disc 1 continues to rotate in the second direction and reaches the dead point position, and then the seventh pressing member 17 simultaneously abuts against the first actuating member 2 and the second actuating member 3, so that the first actuating member 2 continues to pivot in the first direction, the first micro switch 4 is deactivated, the motor stops running, as shown in fig. 32, at which time the drive disc 1 has rotated past the dead point position, and in addition, the second actuating member 3 also pivots in the first direction, the second micro switch 5 is deactivated, as shown in fig. 33. Fig. 33 shows the blocking member 12 blocked by the opening release 7, the switching device being in a ready-to-open state. Then, the electromagnet is energized to pull the closing trip piece 6 and the opening trip piece 7 so that the opening trip piece 7 leaves the rotation path of the blocking piece 12, as shown in fig. 34.

Then, the electromagnet is stopped to be electrified, and the closing release fastener 6 is reset under the action of a reset spring of the electromagnet, so that the moving contact reaches a separation position for separating from the fixed contact, and the switching equipment is opened as shown in fig. 35. Thereafter, the first actuator 2 is pivoted further in the first direction under the action of its return spring 25 to reach a final position, which is held by a holding member not shown in the figures. Similarly, the second actuator 3 will also reach its final position, held by a holding member not shown in the figures.

The breaking mechanism of the application is described above, which can automatically commutate the direct current motor, and has simpler structure, and the structure is simple and clear through the matching of the micro switch, the actuating piece and the driving disc. In addition, the current direction of the motor is only related to the state of the second actuating piece, namely the state is only recorded and the process is not recorded, so that the fault tolerance is high and reliable. The number of parts is reduced, and the product cost and the investment cost are reduced. The breaking mechanism is suitable for fusion switches and other switching appliances with similar functions, such as electric isolating switches, ATSE and the like.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (23)

1. A breaking mechanism for a switchgear comprising:

a housing;

the driving disc is pivotally arranged on the shell and can pivot under the driving of the motor, so that the moving contact is pivoted between a contact position and a separation position with the fixed contact;

A mechanism energy storage configured to provide a force to continue rotation of the drive disk after the drive disk passes through the dead point position;

the first micro switch is connected in a control circuit of the motor and is configured to drive the motor to operate when being excited;

a second micro switch connected to the control circuit of the motor and configured to switch the operation direction of the motor when excited,

The breaking mechanism is characterized by further comprising:

A first actuator pivotably disposed on the housing and configured to move between a first state in which the first actuator actuates the first microswitch and a second state in which the first actuator does not actuate the first microswitch when driven by the drive disk during pivoting of the drive disk;

A second actuator pivotally disposed on the housing and configured to move between a third state, in which the second actuator actuates the second microswitch, and a fourth state, in which the second actuator does not actuate the second microswitch,

During the switching of the switch device from the opening state to the closing state, the motor is operated under the excitation of the external switch, so that the driving disc is pivoted in the first direction, the first actuating member is moved from the second state to the first state under the driving of the driving disc, the first micro-switch is excited, after the driving disc passes through the dead point position, the first actuating member is moved from the first state to the second state under the driving of the driving disc, the motor is stopped, and finally the moving contact reaches the contact position,

During switching of the switch equipment from the closing state to the opening state, the second actuating piece moves from the fourth state to the third state under the driving of the driving disc, so that the motor is turned, the first actuating piece moves from the second state to the first state under the driving of the driving disc, the first micro switch is excited, the driving disc reversely rotates under the driving of the motor, and finally the moving contact reaches the separation position.

2. A breaking mechanism according to claim 1, further comprising a first abutment provided on the drive disc, the first abutment being configured to abut the first actuator as the drive disc pivots to move the first actuator from the second state to the first state when the switching device is switched from the open state to the closed state.

3. A breaking mechanism according to claim 2, wherein when the switching device is switched from the open state to the closed state, the motor is operated by the actuation of the external switch to cause the drive disc to pivot in the first direction, and after the first pressing member presses the first actuating member to move from the second state to the first state, the external switch stops the actuation of the motor, and the motor continues to operate by the actuation of the first microswitch to cause the drive disc to continue to pivot in the first direction.

4. A breaking mechanism according to claim 3, further comprising a second abutment provided on the drive disc, the second abutment being configured to abut against the first actuator to move it from the first state to the second state in response to pivoting of the drive disc in the first direction, thereby stopping the motor, when the drive disc has pivoted past the dead point position such that the drive disc continues to pivot in the first direction and eventually the movable contact reaches a contact position in contact with the stationary contact.

5. A breaking mechanism according to claim 4, further comprising a third abutment provided on the drive disc, the third abutment being configured to abut against the second actuator to move from the fourth state to the third state after the drive disc has pivoted past the dead-centre position, so as to switch the direction of operation of the motor.

6. A breaking mechanism according to claim 5, further comprising a fourth abutment provided on the drive disc, the fourth abutment being configured to abut against the first actuator to move from the second state to the first state after the drive disc continues to pivot in the first direction to bring the movable contact into the contact position, thereby activating the first microswitch to reverse operation of the motor to thereby pivot the drive disc in a second direction opposite the first direction.

7. A breaking mechanism according to claim 6, wherein there is a lost motion between the movable contact and the drive disc such that the movable contact remains in the contact position when the drive disc begins to pivot in the second direction.

8. A breaking mechanism according to claim 6, wherein during pivoting of the drive disc in the second direction, the shape of the second abutment and the shape of the first actuator are configured such that the second abutment is able to pass over the first actuator without changing the position of the first actuator.

9. A breaking mechanism according to claim 8, wherein the first actuating member has a sloped structure along which the second abutment member pivots during pivoting of the drive disc in the second direction so as to pass over the first actuating member.

10. A breaking mechanism according to claim 6, further comprising a fifth abutment provided on the drive disc, the fifth abutment being configured to abut against the first actuator member to move from the first state to the second state during continued pivoting of the drive disc in the second direction, thereby to deactivate the motor, while the drive disc passes the dead-centre position, the sixth abutment provided on the drive disc abutting against the second actuator member to move from the third state to the fourth state.

11. A breaking mechanism according to claim 10, wherein after the drive disc passes the dead point position, the drive disc starts to drive the moving contact and eventually brings the moving contact to a separated position separated from the stationary contact.

12. A breaking mechanism according to claim 10, further comprising:

And one end of the closing release piece is pivotally arranged on the shell and is configured to pivot between a closing release position and a closing blocking position, in the closing release position, the closing release piece does not block the driving disc from pivoting along the first direction so as to allow the driving disc to pivot along the first direction to drive the moving contact to reach the contact position, and when the driving disc passes through the dead point position, the driving disc is blocked by the closing release piece, so that the driving disc cannot continue to pivot along the first direction.

13. A breaking mechanism according to claim 12, further comprising an electromagnet operatively coupled to the closing release member capable of pivoting the closing release member from the closing blocking position to the closing release position when energized, and capable of returning from the closing release position to the closing blocking position upon de-energization thereof under the influence of a return spring thereof.

14. A breaking mechanism according to claim 12, further comprising a blocking member disposed on the drive plate, the blocking member being blocked by the closing release member in a closing blocking position of the closing release member.

15. A breaking mechanism according to claim 14, further comprising:

One end of the opening release piece is pivotally arranged on the shell, the pivot point of the opening release piece is the same as the pivot point of the closing release piece,

The opening release piece is configured to pivot between an opening release position and an opening blocking position, and in the opening release position, the opening release piece does not block the driving disc from pivoting along the second direction so as to allow the driving disc to pivot along the second direction to drive the moving contact to reach the separation position, and when the driving disc passes through the dead point position, the driving disc is blocked by the opening release piece, so that the driving disc cannot continue to pivot along the second direction.

16. A breaking mechanism according to claim 15, wherein when the electromagnet drives the closing trip member to pivot, the closing trip member also drives the opening trip member to pivot together.

17. A breaking mechanism according to claim 15, wherein the other end of the breaking release member is movably mounted to the closing release member, the breaking release member having a further pivot point between one end and the other end, the blocking member pushing the breaking release member such that the breaking release member pivots about the further pivot point when the drive disc pivots in the first direction but does not reach the dead point position, such that the breaking release member does not block pivoting of the drive disc in the first direction.

18. A breaking mechanism according to claim 3, wherein the first and second actuating members are arranged to be pivotable about the same pivot point.

19. A breaking mechanism according to claim 18, further comprising a seventh abutment provided on the drive disc, the seventh abutment being configured to abut against the first actuator to move from the first to the second state in response to pivoting of the drive disc in the first direction, thereby to deactivate the motor, and the seventh abutment being configured to abut against the second actuator to pivot the second actuator from the fourth to the third state to actuate the second microswitch to enable reverse operation of the motor, wherein the drive disc is pivoted past the dead point position to continue pivoting of the drive disc in the first direction and ultimately to bring the movable contact into contact with the stationary contact.

20. A breaking mechanism according to claim 19, further comprising an eighth abutment provided on the drive disc, the eighth abutment being configured to abut against the first actuator to move from the second state to the first state when the drive disc continues to pivot in the first direction to bring the movable contact into the contact position, thereby activating the first microswitch to reverse operation of the motor to thereby cause the drive disc to pivot in a second direction opposite the first direction.

21. A breaking mechanism according to claim 20, wherein during continued pivoting of the drive disc in the second direction, the seventh abutment is configured to abut against the first actuator to move it from the first state to the second state, thereby stopping the motor, while the seventh abutment abuts against the second actuator to pivot the second actuator from the third state to the fourth state to deactivate the second microswitch, whereupon the drive disc pivots past the dead centre position such that the drive disc continues to pivot in the second direction and eventually the movable contact reaches the disengaged position in contact with the stationary contact.

22. A switchgear comprising a breaking mechanism according to any one of claims 1 to 21.

23. The switching device of claim 22, wherein the switching device is a fusion switch, an electrical isolation switch, or a dual power transfer switch.