CN115881482A - Mechanical breakpoint mechanism for circuit breaker and circuit breaker - Google Patents
Mechanical breakpoint mechanism for circuit breaker and circuit breaker Download PDFInfo
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- CN115881482A CN115881482A CN202111162356.1A CN202111162356A CN115881482A CN 115881482 A CN115881482 A CN 115881482A CN 202111162356 A CN202111162356 A CN 202111162356A CN 115881482 A CN115881482 A CN 115881482A
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- movable contact
- circuit breaker
- reset
- blocking
- closed position
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Abstract
The invention relates to a mechanical breakpoint mechanism for a circuit breaker and the circuit breaker. The mechanical breakpoint mechanism includes: a moving contact and a static contact; a reset member connected to the movable contact of the circuit breaker and mounted to a housing of the circuit breaker via a first elastic member such that the first elastic member is compressed when the reset member drives the movable contact to move from an open position to a closed position; a transmission assembly configured to abut against the reset member with a predetermined force in a closed position of the movable contact, so that the first elastic member is maintained in a compressed state; and the releasing piece is configured to move between an initial position and a releasing position, the releasing piece is not contacted with the transmission assembly in the initial position, the releasing piece abuts against the transmission assembly and exerts releasing force during the movement of the releasing piece from the initial position to the releasing position, the transmission assembly is separated from abutting against the resetting piece by overcoming the preset force, and the resetting piece drives the movable contact to move to the disconnection position under the action of the elastic force of the first elastic piece.
Description
Technical Field
The invention relates to a mechanical breakpoint mechanism for a circuit breaker and the circuit breaker.
Background
The circuit breaker requires a mechanical breaking point mechanism to ensure the requirement of insulation isolation. In general, mechanical breakpoint mechanisms need to have three basic functions: manual release breakpoints, manual reset breakpoints, and electric release breakpoints. The electric breakpoint releasing function generally depends on capacitor discharge to supply power to the electromagnet, and the electromagnet is combined to open the mechanical breakpoint. And a large force is required to open the breakpoint, so that a large electromagnet and a large capacitor are required, and the occupied space is large. The manual release of the break point requires a large force to be applied, which is inconvenient for the operator.
Disclosure of Invention
Accordingly, the present invention is a mechanical trip mechanism for a circuit breaker that reduces the force applied to release a trip point. This mechanical breakpoint mechanism includes: the moving contact is constructed to be capable of moving between an open position and a closed position, the moving contact is not contacted with the fixed contact at the open position, and the moving contact is contacted with the fixed contact at the closed position; a reset member connected to the movable contact of the circuit breaker and mounted to a housing of the circuit breaker via a first elastic member such that the first elastic member is compressed when the reset member moves the movable contact from the open position to the closed position; a transmission assembly configured to abut against the reset member with a predetermined force in a closed position of the movable contact, so as to maintain the first elastic member in a compressed state and maintain the movable contact in the closed position; and the releasing piece is configured to move between an initial position and a releasing position, the releasing piece is not contacted with the transmission assembly in the initial position, and the releasing piece abuts against the transmission assembly and exerts a releasing force during the movement of the releasing piece from the initial position to the releasing position, so that the transmission assembly is separated from the abutting with the resetting piece by overcoming the preset force, and the resetting piece drives the movable contact to move from the closing position to the opening position under the action of the elastic force of the first elastic piece.
Advantageously, the transmission assembly comprises: a rotary member pivotably mounted to a housing of the circuit breaker; and a blocking member pivotally mounted to the housing of the circuit breaker, the blocking member having a second elastic member biasing the blocking member in a direction in which the blocking member rotates away from the reset member, the rotating member being configured to be biased against the blocking member via the predetermined force in the closed position of the movable contact and to prevent the blocking member from pivoting against the biasing force of the second elastic member, such that the blocking member abuts against the reset member, thereby maintaining the first elastic member in a compressed state to maintain the movable contact in the closed position.
Advantageously, when the release member moves from the initial position to the release position, the release member is configured to pivot the rotating member together in a first direction, so that the rotating member is disengaged from the abutment with the blocking member against the predetermined force, and then the blocking member rotates in a second direction opposite to the first direction under the action of the second elastic member of the blocking member and is disengaged from the abutment with the reset member, so that the reset member drives the movable contact to move away from the fixed contact under the action of the first elastic member.
Advantageously, the blocking element has a recess and the return element has a projection which, in the closed position of the movable contact, abuts against the recess to keep the first elastic element in compression and to keep the movable contact in the closed position.
Advantageously, the rotary member has a third elastic member for providing a restoring force for restoring the rotary member.
Advantageously, said third elastic element is also configured to bias the rotary element in a direction of rotation of the rotary element away from the blocking element, in the closed position of the movable contact.
Advantageously, the blocking member has an opening, and when the rotary member is pivoted in the first direction, the part of the rotary member abutting against the blocking member is configured to rotate into the opening and abut against an edge of the opening, thereby disengaging from the abutment against the blocking member, enabling the blocking member to rotate by a certain angle.
Advantageously, the rotating member has a stopper portion configured to abut against the stopper when the stopper is rotated by a certain angle in the second direction by the second elastic member thereof, thereby limiting a rotation range of the stopper.
Advantageously, in the open position of the movable contact, when the return element is pressed, the return element is configured to abut against the stop element and to pivot the stop element in the first direction, so as to abut against the return element, and the rotary element is configured to again abut against the stop element with a predetermined force.
Advantageously, the reset element has a pressing portion, the blocking member having an engagement portion cooperating with the pressing portion, the pressing portion being spaced from the engagement portion by a predetermined distance in the closed position of the movable contact, so that the pressing portion does not interfere with the rotation of the engagement portion when the blocking member is disengaged from abutment with the reset element.
Advantageously, in the open position of the movable contact, when the return element is pressed, the pressing portion of the return element is configured to abut against the cooperating portion of the blocking element and to pivot the blocking element in the first direction, so as to abut against the return element, and the rotary element is configured to abut against the blocking element again with a predetermined force.
Advantageously, the transmission assembly further comprises a support pivotally mounted to the housing of the circuit breaker and supporting a rotary member, the rotary member being configured to rotate with the support, the release member being configured to contact the support and cause the support to pivot the rotary member in a first direction when the release member is moved from an initial position towards a release position.
The invention also provides a circuit breaker comprising the mechanical breakpoint mechanism.
Drawings
Advantages and objects of the present invention will be better understood in the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:
fig. 1 shows a simplified schematic view of a mechanical breakpoint mechanism according to the present invention when the movable contact is in the closed position.
Fig. 2 shows a perspective view of the mechanical breakpoint mechanism according to the invention when the movable contact is in the closed position.
Figure 3 shows another perspective view of the mechanical breakpoint mechanism according to the invention when the movable contact is in the closed position.
Fig. 4 shows a simplified schematic view of a mechanical breakpoint mechanism according to the present invention during the movement of the movable contact from the closed position to the open position.
Fig. 5 shows a perspective view of the mechanical breakpoint mechanism according to the present invention during the movement of the movable contact from the closed position to the open position.
Fig. 6 shows another perspective view of the mechanical breakpoint mechanism according to the present invention during the movement of the movable contact from the closed position to the open position.
Fig. 7 shows a simplified schematic view of the mechanical breakpoint mechanism according to the present invention when the movable contact is in the open position.
Fig. 8 shows a perspective view of the mechanical breakpoint mechanism according to the invention when the movable contact is in the open position.
Fig. 9 shows another perspective view of the mechanical breakpoint mechanism according to the present invention when the movable contact is in the open position.
Fig. 10 shows a perspective view of a blocking member of the mechanical breakpoint mechanism according to the invention.
Figure 11 shows a perspective view of a rotating member of a mechanical breakpoint mechanism according to the invention.
Figure 12 illustrates a front view of a circuit breaker incorporating a mechanism breakpoint mechanism according to the present invention.
Figure 13 shows a perspective view of a circuit breaker incorporating a mechanism breakpoint mechanism according to the present invention.
Detailed Description
Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The term "sequentially include A, B, C, etc." merely indicates the order of arrangement of the included components A, B, C, etc., and does not exclude the possibility of including other components between a and B and/or between B and C.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships.
Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to fig. 1 to 13.
The mechanical breaking point mechanism 1 according to the invention is described in the following description in the convenience of a solid state circuit breaker, in the case of which it concerns an electrical release breaking point and a manual reset breaking point. It should be understood, however, that the mechanical break point mechanism of the present invention is not limited to application only to solid state circuit breakers.
The mechanical breakpoint mechanism 1 according to the present invention includes a movable contact 11 and a fixed contact 12, the movable contact is capable of moving between an open position and a closed position, the movable contact is separated from the fixed contact at the open position, at this time, the circuit breaker is in an open state, as shown in fig. 3, and at the closed position, the movable contact is in contact with the fixed contact, at this time, the circuit breaker is in a closed state, as shown in fig. 1. The reset element 13 is connected to the movable contact and is mounted to a housing of the circuit breaker (as shown in fig. 1, 12 and 13) via a first elastic element 14, such that in a closed position of the movable contact, the first elastic element is in a compressed state, and when the movable contact moves from the closed position to an open position, the first elastic element returns from the compressed state to a released state, so as to release energy, and the reset rod drives the movable contact to move to the open position under the action of the first elastic element. Furthermore, the reset element 13 may be connected to the movable contact via a fourth elastic element 17 (as shown in fig. 1, 12 and 13), so that in the closed position of the movable contact, the fourth elastic element is also in a compressed state, and when the movable contact moves from the closed position toward the open position, the fourth elastic element will return from the compressed state to a released state. It is well known to those skilled in the art to connect the reset element and the movable contact by a fourth elastic element.
The release member 15 is used for electrically moving the movable contact from the closed position to the open position, so that the circuit breaker is switched from the closing state to the opening state.
The mechanical breakpoint mechanism according to the present invention further comprises a transmission assembly 16 configured to abut against the reset element with a predetermined force in the closed position of the movable contact, so as to maintain the first elastic element in a compressed state, thereby maintaining the movable contact in the closed position. Specifically, in the present embodiment, the transmission assembly 16 includes a support 161, a rotary 162, and a blocking member 163. The support 161 is pivotably mounted to the case of the circuit breaker and supports the rotary 162 such that the rotary can pivot together with the support. The rotary member 162 is further provided with a third elastic member 1624 (shown in fig. 1) that provides a restoring force to restore the rotary member, as described below. See, for example, fig. 11, which shows a perspective view of the rotating member. The rotating member 162 has a first hole 1622 through which a pivot shaft, not shown, may pass to pivot the rotating member about the pivot shaft.
The blocking member is pivotably mounted to the housing and has a second elastic member 1631, the second elastic member 1631 biasing the blocking member in a direction in which the blocking member rotates away from the reset member (i.e., clockwise in the drawing) while the blocking member abuts against the rotating member. In the closed position of the movable contact, the position of the rotating element is limited by the limiting device, so that the rotating element cannot rotate in the direction far away from the rotation of the resetting element under the action of the blocking element and abuts against the blocking element with a preset force. The stop may comprise a leg 1623 of the rotary member and a notch 1636 of the blocking member (as shown in fig. 6, 10 and 11), so that in the closed position of the movable contact, the leg 1623 abuts against an upper edge of the notch 1636. During rotation of the swivel, the legs 1623 are able to rotate within the notches. For example, referring to FIG. 10, which shows a perspective view of the blocking member, the blocking member 163 has a second aperture 1635 through which a pivot shaft, not shown, can pass to pivot the blocking member about the pivot shaft. In the above example, the third elastic member 1624 is only used to provide a restoring force for restoring the rotating member by virtue of the blocking member biasing the blocking member in a direction rotating away from the restoring member. However, alternatively, in another example, the third elastic element of the rotating element 162 may be configured to bias the rotating element in a direction away from the blocking element (i.e. clockwise in the figure) in the closed position of the movable contact, which has the advantage of making the abutment of the rotating element against the blocking element more stable in the closed position of the movable contact without being disengaged from the abutment against the blocking element due to an accidental collision or the like.
In the closed position of the movable contact, the rotating member 162 abuts against the blocking member with a predetermined force, and overcomes the biasing force of the second elastic member to abut against the restoring member, so as to maintain the first elastic member in a compressed state. In particular, the blocking element 163 has a recess 1632 and the return element 13 has a protrusion 131, the protrusion 131 abutting against an edge of the recess 1632 in the closed position of the movable contact, so as to maintain the first elastic element in a compressed state. The grooves and protrusions are described by way of example only and other suitable means will be apparent to those skilled in the art to achieve the effect of maintaining the first resilient member in a compressed state.
The following describes the operation process of the mechanical breaking point mechanism when the breaker is switched from a closing state to an opening state, that is, the moving contact moves from a closing position to an opening position.
As shown in fig. 1 to 3, in the closed position of the movable contact, the rotary member 162 abuts against the blocking member 163, and the protrusion of the reset member abuts against the groove of the blocking member. When the release 15 is pressed downward, the release abuts against the support 161 and rotates the support in a first direction (e.g., counterclockwise) against a predetermined force, the support rotates the rotary 162 in the first direction, which causes the rotary to disengage from the abutment with the stopper.
At this time, the blocking member 163 rotates in a direction opposite to the first direction (e.g., clockwise) by the second elastic member. The stopper 163 also has an opening 1633, and the portion of the rotary piece 162 abutting against the stopper moves into the opening 1633. The rotary member has a stopper 1621 that abuts the stopper when the portion of the rotary member 162 abutting the stopper moves into the opening 1633 and the stopper rotates a certain angle in the second direction, thereby preventing the stopper from further rotating, defining the rotation range of the stopper, as shown in fig. 4 to 6. Then, the rotation of the blocking member in the second direction may cause the protrusion of the resetting member to be out of abutment with the groove of the blocking member, which causes the resetting member to move upward under the elastic force of the first elastic member, and drives the movable contact to move to the off position, as shown in fig. 7 to 9.
The reset member 13 further has a pressing portion 132, and the blocking member further has an engaging portion 1634 cooperating with the pressing portion. In the closed position of the movable contact, the pressing portion 132 is spaced apart from the mating portion 1634 by a predetermined distance, which enables the pressing portion 132 not to interfere with the rotation of the mating portion 1634 when the blocking member rotates in the second direction. The cooperation of the pressing portion 132 and the fitting portion 1634 is mainly reflected when the movable contact moves from the open position to the closed position.
The operation process of the mechanical breaking point mechanism during the switching of the circuit breaker from the closing state to the opening state, i.e. the moving contact moves from the closing position to the opening position, is briefly described as follows.
Pressing the reset member 13 downward such that the pressing portion 132 of the reset member 13 abuts against the fitting portion 1634 of the blocking member 163 causes the blocking member to pivot in the first direction, and the protrusion 131 of the reset member 13 moves into the groove 1632 of the blocking member to abut against the edge of the groove 1632. Pivoting of the blocking member in the first direction causes the part of the rotary member abutting the blocking member to disengage from the opening 1633 of the blocking member 163 and disengage from the blocking member, which causes the rotary member to be reset under the influence of its third resilient member to a position abutting the blocking member.
The present invention also provides a circuit breaker, such as a solid state circuit breaker, including a mechanical break point mechanism, as shown in fig. 12. While the mechanical break point mechanism is described above, many of the components of the circuit breaker have been removed for ease of description.
With the mechanical breakpoint mechanism of the invention, the force applied to the release lever 15 when moving the moving contact from the closed position towards the open position only needs to be greater than the predetermined force of the rotary member against the blocking member to disengage the rotary member from the blocking member, regardless of the compression force of the first resilient member, reducing the release force, whether it be manual or electrical (smaller electromagnets may be used).
The above description is merely illustrative of the present invention, which is set forth to enable one of ordinary skill in the art to fully practice the present invention, and not to limit the present invention. The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.
Claims (14)
1. A mechanical break point mechanism for a circuit breaker, the mechanical break point mechanism comprising:
the moving contact is constructed to be capable of moving between an open position and a closed position, the moving contact is not contacted with the fixed contact at the open position, and the moving contact is contacted with the fixed contact at the closed position;
a reset member connected to the movable contact of the circuit breaker and mounted to the housing of the circuit breaker via a first elastic member such that the first elastic member is compressed when the reset member drives the movable contact to move from the open position to the closed position;
the transmission assembly is configured to abut against the reset piece with a preset force in the closed position of the movable contact, so that the first elastic piece is kept in a compressed state, and the movable contact is kept in the closed position;
and the releasing piece is configured to move between an initial position and a releasing position, the releasing piece is not contacted with the transmission assembly in the initial position, and the releasing piece abuts against the transmission assembly and exerts a releasing force during the movement of the releasing piece from the initial position to the releasing position, so that the transmission assembly is separated from the abutting with the resetting piece by overcoming the preset force, and the resetting piece drives the movable contact to move from the closing position to the opening position under the action of the elastic force of the first elastic piece.
2. The mechanical breakpoint mechanism of claim 1, wherein the transmission assembly comprises:
a rotating member pivotably mounted to a housing of the circuit breaker;
a blocking member pivotably mounted to a housing of the circuit breaker, the blocking member having a second resilient member biasing the blocking member in a direction in which the blocking member rotates away from the reset member,
the rotating member is configured to be biased against the blocking member via the predetermined force in the closed position of the movable contact, and to prevent the blocking member from pivoting against the biasing force of the second elastic member, so that the blocking member abuts against the reset member, thereby maintaining the first elastic member in a compressed state and maintaining the movable contact in the closed position.
3. The mechanical breakpoint mechanism of claim 3, wherein when the release member moves from the initial position toward the release position, the release member is configured to pivot the rotating member in a first direction such that the rotating member overcomes the predetermined force to disengage from the abutment with the blocking member, and the blocking member rotates in a second direction opposite to the first direction under the action of the second elastic member, and disengages from the abutment with the reset member, such that the reset member drives the movable contact to move away from the fixed contact under the action of the first elastic member.
4. The mechanical breakpoint mechanism of claim 2, wherein the blocking member has a recess and the reset member has a protrusion that abuts the recess in the closed position of the movable contact to retain the first resilient member in compression to retain the movable contact in the closed position.
5. The mechanical breakpoint mechanism of any one of claims 2 to 4, wherein the rotating member has a third resilient member for providing a restoring force for restoring the rotating member.
6. The mechanical breakpoint mechanism of claim 5, wherein the third resilient member is further configured to bias the rotary member in a direction of rotation of the rotary member away from the blocking member in the closed position of the movable contact.
7. The mechanical breakpoint mechanism of claim 3, wherein the blocking member has an opening, and when the rotating member pivots in a first direction, a portion of the rotating member that abuts the blocking member is configured to rotate into the opening and abut an edge of the opening, thereby disengaging the abutment with the blocking member to enable the blocking member to rotate through an angle.
8. The mechanical breakpoint mechanism of claim 3, wherein the rotating member has a stopper portion configured to abut against the blocking member when the blocking member is rotated in the second direction by a certain angle under the action of the second elastic member thereof, thereby limiting a rotation range of the blocking member.
9. The mechanical breakpoint mechanism of claim 3, wherein in the off position of the movable contact, when the reset member is depressed, the reset member is configured to abut the stop member and pivot the stop member in a first direction to abut the reset member, and the rotating member is configured to again abut the stop member with a predetermined force.
10. The mechanical breakpoint mechanism of claim 9, wherein the reset element has a pressing portion, the blocking member has an engagement portion cooperating with the pressing portion, and in the closed position of the movable contact, the pressing portion is spaced from the engagement portion by a predetermined distance such that the pressing portion does not interfere with rotation of the engagement portion when the blocking member is disengaged from abutment with the reset element.
11. The mechanical breakpoint mechanism of claim 10, wherein in the off position of the movable contact, when the reset element is pressed, the pressing portion of the reset element is configured to abut against the mating portion of the blocking element and pivot the blocking element in the first direction to abut against the reset element, and the rotating element is configured to again abut against the blocking element with a predetermined force.
12. The mechanical breakpoint mechanism of claim 3, wherein the transmission assembly further comprises a support pivotally mounted to the housing of the circuit breaker and supporting a rotating member, the rotating member configured to rotate with the support, the release member configured to contact the support and cause the support to pivot the rotating member in a first direction when the release member moves from an initial position toward a release position.
13. A circuit breaker, characterized in that it comprises a mechanical breakpoint mechanism according to any one of claims 1 to 12.
14. The circuit breaker of claim 13, wherein the circuit breaker is a solid state circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111162356.1A CN115881482A (en) | 2021-09-30 | 2021-09-30 | Mechanical breakpoint mechanism for circuit breaker and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111162356.1A CN115881482A (en) | 2021-09-30 | 2021-09-30 | Mechanical breakpoint mechanism for circuit breaker and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115881482A true CN115881482A (en) | 2023-03-31 |
Family
ID=85756699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111162356.1A Pending CN115881482A (en) | 2021-09-30 | 2021-09-30 | Mechanical breakpoint mechanism for circuit breaker and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115881482A (en) |
-
2021
- 2021-09-30 CN CN202111162356.1A patent/CN115881482A/en active Pending
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