Circuit breaker
By setting a barrier in the locking mechanism of the circuit breaker, the contact between the dynamic and static contacts is delayed, and the problem of difficulty in ensuring consistency and early closing of the circuit breaker is solved, and the reliable breaking and multi-phase moving contact of the circuit breaker are achieved head consistency.
Patent Information
- Application Number
- CN202420296516.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-18
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-18
AI Technical Summary
It is difficult for existing circuit breakers to ensure the consistency of closing when the contacts are closed, and the dynamic and static contacts may be closed in advance, resulting in the circuit breaker being unable to be reliably disconnected after tripping.
The moving contact movement path of the locking mechanism is provided with the moving contact so that the moving contact first contacts the extrusion barrier, and the reaction is used to delay contacting the static contact, ensuring that the static contact and the static contact are completed after the locking mechanism is completed. Contact closure.
By delaying the contact of dynamic and static contacts, ensure that the locking mechanism is locked before closing, avoiding early closure, ensuring reliable disconnection of the circuit breaker, and maintaining the consistency of each phase of the contact in the multi-phase circuit breaker.
Smart Images
Figure CN222530350U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art
[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time.
[0003] The breaking capacity of the circuit breaker determines the protection performance of the circuit breaker. Usually, when the circuit breaker is working normally, the moving contact and the static contact are in a closed state, and the two ensure a certain contact pressure to achieve reliable connection of the line; once an abnormal current appears in the line, the internal mechanism will release the lock of the original mechanism through thermal tripping, electromagnetic tripping or a combination of the two, and the circuit breaker will break normally to ensure reliable disconnection of the line.
[0004] Due to the manufacturing and assembly errors of the moving contacts of the existing circuit breakers, it is difficult to ensure the consistency of closing when the contacts are closed. In addition, it is easy for the moving and static contacts of a phase contact to close prematurely when the locking mechanism has not yet been completely locked, resulting in the circuit breaker being unable to reliably disconnect after the product is tripped. Utility Model Content
[0005] The utility model aims to provide a circuit breaker for solving the problem that it is difficult to ensure the consistency of closing when the contacts are closed, and it is easy for the moving and static contacts of a phase contact to close in advance when the locking mechanism has not been completely locked, thereby causing the circuit breaker to be unable to be safely disconnected after the product is tripped.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A circuit breaker, including a locking mechanism, comprising:
[0008] Stationary contact;
[0009] A moving contact, which is in transmission connection with the locking mechanism, and the locking mechanism is used to drive the moving contact to move along the first path and contact with the stationary contact;
[0010] A blocking member is located on the first path and is elastic. When the moving contact moves along the first path, one end of the moving contact can squeeze and pass over the blocking member, so that after the locking mechanism completes the locking, the moving contact and the static contact are closed.
[0011] As an optional solution for a circuit breaker, the blocking member includes a mounting main board and a vertical arm protruding from the mounting main board, and one end of the moving contact can squeeze the vertical arm to move the mounting main board toward the static contact.
[0012] As an optional solution for a circuit breaker, a plurality of bending sections are provided on the same side of the mounting main board as the vertical arm, and a second strip groove is provided inside the bending section, and each of the second strip grooves extends to an end of the bending section away from the mounting main board.
[0013] As an optional solution for a circuit breaker, the end of the bending section away from the mounting main board is arched, and the bending section is elastic; when one end of the moving contact can squeeze the vertical arm, the bending section is squeezed.
[0014] As an optional solution of a circuit breaker, the circuit breaker further includes a base, the base is provided with a mounting groove, and the mounting main board is arranged in the mounting groove.
[0015] As an optional solution for a circuit breaker, the mounting main board is provided with a first strip groove, and the first strip groove extends to an end of the vertical arm and the mounting main board away from the mounting main board.
[0016] As an optional solution for a circuit breaker, a first inclined surface is provided at one end of the vertical arm away from the mounting main board, and the first inclined surface is inclined toward the static contact.
[0017] As an optional solution for a circuit breaker, one end of the moving contact is provided with a second inclined surface matched with the first inclined surface.
[0018] As an optional solution for a circuit breaker, one end of the moving contact close to the blocking member is an arc-shaped surface.
[0019] As an optional solution for a circuit breaker, the blocking member is an integrated structural member.
[0020] Beneficial effects:
[0021] The utility model sets a blocking member, and in the process of the lock mechanism driving the moving contact, the moving contact first contacts the extrusion blocking member, and uses the reaction of the blocking member to delay the contact between the moving contact and the static contact, so as to ensure that the locking mechanism completes the locking before the moving contact and the static contact are closed, and the locking mechanism further drives the moving contact to cross the blocking member, thereby completing the contact and closure of the moving contact and the static contact. The utility model sets a blocking member on the moving path of the moving contact, so that the moving contact and the static contact are delayed in contact, and the moving contact and the static contact are avoided from closing in advance before the locking mechanism is completely locked, thereby ensuring the reliable disconnection of the circuit breaker; in addition, by setting the blocking member, it can be ensured that in a multi-phase circuit breaker, the moving contacts of each phase first abut the blocking member, so that the multi-phase moving contacts are in a consistent relative position before contacting the static contact, thereby avoiding the poor consistency of the multi-phase linkage of the circuit breaker due to manufacturing or assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1It is a schematic diagram of the internal structure of the circuit breaker provided by the embodiment of the utility model;
[0023] Figure 2 This is a front view of the interior of the circuit breaker provided by the embodiment of the utility model;
[0024] Figure 3 It is a structural schematic diagram of a blocking member provided in an embodiment of the utility model;
[0025] Figure 4 It is a structural schematic diagram of a base provided by an embodiment of the utility model;
[0026] Figure 5 It is a schematic diagram of the structure of the cooperation between the base and the blocking member provided in an embodiment of the utility model.
[0027] In the figure:
[0028] 100. Locking mechanism;
[0029] 1. Static contact;
[0030] 2. Moving contact; 21. Second inclined surface;
[0031] 3. Blocking member; 31. Installing main board; 311. First strip groove; 312. Bending section; 313. Second strip groove; 32. Vertical arm; 321. First inclined surface;
[0032] 4. Base; 41. Mounting slot. DETAILED DESCRIPTION
[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0037] Please see attached Figure 1 and attached Figure 2 The present embodiment relates to a circuit breaker, which includes a locking mechanism 100, a stationary contact 1, a moving contact 2, and a blocking member 3. The moving contact 2 is in transmission connection with the locking mechanism 100, and the locking mechanism 100 is used to drive the moving contact 2 to move along a first path and contact the stationary contact 1; the blocking member 3 is located on the first path, and the blocking member 3 is elastic. When the moving contact 2 moves along the first path, one end of the moving contact 2 can squeeze and pass over the blocking member 3, so that after the locking mechanism 100 completes the locking, the moving contact 2 and the stationary contact 1 are closed.
[0038] In this embodiment, the locking mechanism 100 is a conventional mechanism inside the existing circuit breaker. When the circuit breaker is closed, the locking member of the locking mechanism 100 is kept in the locked state by driving the circuit breaker handle, and the moving contact 2 is linked to contact with the static contact 1, so that the overall mechanism remains balanced; when an abnormal circuit appears inside the circuit breaker, the tripping member of the circuit breaker will trigger the unlocking of the locking member of the locking mechanism 100. At this time, the mechanism performs an unlocking action and drives the moving contact 2 to separate from the static contact 1, thereby realizing reliable disconnection of the circuit. The circuit breaker is provided with an energy storage element to ensure its reliable disconnection. When the circuit breaker is opened, the energy storage element can release its energy to quickly drive the moving contact 2 to separate from the static contact 1; illustratively, the torsion spring inside the circuit breaker serves as the energy storage element. In this embodiment, a blocking member 3 is provided so that when the locking mechanism 100 drives the moving contact 2, the moving contact 2 first contacts and squeezes the blocking member 3. Due to the reaction of the blocking member 3, the moving contact 2 and the stationary contact 1 are delayed in contact, ensuring that the locking mechanism 100 completes the locking before the moving contact 2 and the stationary contact 1 are closed. The locking mechanism 100 further drives the moving contact 2 to pass the blocking member 3, thereby completing the contact and closure of the moving contact 2 and the stationary contact 1.
[0039] In this embodiment, a blocking member 3 is provided on the moving path of the moving contact 2 to delay the contact between the moving contact 2 and the stationary contact 1, thereby avoiding premature closing of the moving contact 2 and the stationary contact 1 before the locking mechanism 100 is completely locked, thereby ensuring reliable disconnection of the circuit breaker; in addition, by providing the blocking member 3, it can be ensured that in a multi-phase circuit breaker, the moving contact 2 of each phase first abuts the blocking member 3, so that the multi-phase moving contacts 2 are located in a consistent relative position before contacting the stationary contact 1, thereby avoiding the consistency of the multi-phase linkage of the circuit breaker due to manufacturing or assembly errors.
[0040] Please see attached Figure 1 -Attached Figure 3 Optionally, the blocking member 3 includes a mounting main board 31 and a vertical arm 32 protruding from the mounting main board 31 , and one end of the moving contact 2 can squeeze the vertical arm 32 to move the mounting main board 31 toward the direction close to the stationary contact 1 .
[0041] In this embodiment, when the locking mechanism 100 drives the moving contact 2 to move along the first path, one end of the moving contact 2 is directly pressed against the top of the vertical arm 32, and the vertical arm 32 has a certain reaction force on the moving contact 2. In this embodiment, the mounting main board 31 can move toward the direction of the static contact 1 under the push of the vertical arm 32; of course, in other embodiments, the vertical arm 32 may also have a certain elasticity. After being acted upon by the moving contact 2, the vertical arm 32 will undergo a certain deformation along the movement direction of the moving contact 2. Furthermore, after the moving contact 2 completely passes over the vertical arm 32, the vertical arm 32 elastically recovers and maintains its original state.
[0042] Optionally, a plurality of bending sections 312 are provided on the same side of the mounting main board 31 and the vertical arm 32 , and a second strip groove 313 is provided inside the bending section 312 , and each second strip groove 313 extends to an end of the bending section 312 away from the mounting main board 31 .
[0043] Furthermore, the bending section 312 structure can enhance the overall strength of the blocking member 3. At the same time, by setting a second strip groove 313 that penetrates the thickness direction of the mounting main board 31 and extends into the interior of the bending section 312, during the squeezing of the vertical arm 32, the deformation of multiple bending sections 312 can be used to reduce the deformation of the vertical arm 32, thereby increasing the life of the vertical arm 32.
[0044] Optionally, one end of the bending section 312 away from the mounting main board 31 is arched, and the bending section 312 is elastic; when one end of the moving contact 2 can squeeze the vertical arm 32, the bending section 312 is squeezed.
[0045] In this embodiment, the arched top of the bending section 312 effectively avoids stress concentration when the bending section 312 is deformed, thereby improving the life of the entire blocking member 3; at the same time, the bending section 312 is elastic, which can ensure that after one end of the moving contact 2 passes over the vertical arm 32, the deformation of the bending section 312 can be quickly restored.
[0046] Please see attached Figure 4 and attached Figure 5 Optionally, the circuit breaker further includes a base 4 , the base 4 is provided with a mounting groove 41 , and the mounting main board 31 is arranged in the mounting groove 41 .
[0047] In this embodiment, the circuit breaker is surrounded by a shell and a base 4 to form an internal cavity, and the actuating mechanisms of the circuit breaker are all arranged in the internal cavity. The base 4 is provided with an installation groove 41 for fixing and limiting the installation of the main board 31. The installation main board 31 is rectangular, and the installation groove 41 is also a rectangular groove that can adapt to the installation main board 31.
[0048] Optionally, the mounting main board 31 is provided with a first strip groove 311 , and the first strip groove 311 extends to an end of the vertical arm 32 and the mounting main board 31 away from the mounting main board 31 .
[0049] In this embodiment, the vertical arm 32 and the mounting main board 31 are an integrated structure, and the parts can be processed through an integrated injection molding process. The first strip groove 311 runs through the thickness direction of the mounting main board 31 and extends into the interior of the mounting main board 31.
[0050] By providing the first strip groove 311 , it is possible to ensure that the vertical arm 32 has sufficient elasticity, thereby ensuring the service life of the blocking member 3 .
[0051] Optionally, a first inclined surface 321 is provided at one end of the vertical arm 32 away from the mounting main board 31 , and the first inclined surface 321 is inclined toward the stationary contact 1 .
[0052] When the circuit breaker is disconnected due to abnormal current, the moving contact 2 originally moves in the opposite direction along the first path, and one end of the moving contact 2 touches the top of the vertical arm 32 during the retreat process. By setting the first inclined surface 321, it can be ensured that the moving contact 2 can smoothly pass over the vertical arm 32, thereby preventing the generation of large resistance and jamming.
[0053] Furthermore, a second inclined surface 21 matched with the first inclined surface 321 is provided at one end of the moving contact 2 , and the second inclined surface 21 is inclinedly arranged away from the stationary contact 1 .
[0054] By providing the second inclined surface 21 matched with the first inclined surface 321 , it can be ensured that the first inclined surface 321 of the moving contact 2 rubs against the vertical arm 32 along the second inclined surface 21 , further reducing the resistance of the moving contact 2 during the retreat process.
[0055] Optionally, one end of the moving contact 2 close to the blocking member 3 is an arc-shaped surface.
[0056] The arc surface can prevent the moving contact 2 from contacting the tip of the vertical arm 32, causing damage to the surface of the vertical arm 32, thereby affecting the service life. In addition, the arc surface can also reduce the contact area between the moving contact 2 and the top of the vertical arm 32, thereby causing the vertical arm 32 to deform too much, resulting in an increase in the resistance to closing or opening the moving contact 2.
[0057] Optionally, the blocking member 3 is an integrated structural member.
[0058] In this embodiment, the blocking member 3 as a whole can be an integrated structure, and the blocking member 3 is integrally formed by an integral injection molding process.
[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A circuit breaker, comprising a locking mechanism (100), characterized in that: include: Stationary contact (1); A moving contact (2) is transmission-connected to the locking mechanism (100), and the locking mechanism (100) is used to drive the moving contact (2) to move along a first path and contact the stationary contact (1); A blocking member (3) is located on the first path, and the blocking member (3) is elastic. When the moving contact (2) moves along the first path, one end of the moving contact (2) can squeeze and pass over the blocking member (3), so that after the locking mechanism (100) completes the locking, the moving contact (2) and the stationary contact (1) are closed.
2. The circuit breaker according to claim 1, characterized in that: The blocking member (3) comprises a mounting main board (31) and a vertical arm (32) protruding from the mounting main board (31); one end of the moving contact (2) can press the vertical arm (32) to move the mounting main board (31) in a direction close to the stationary contact (1).
3. The circuit breaker according to claim 2, characterized in that: A plurality of bending sections (312) are provided on the same side of the mounting main board (31) and the vertical arm (32), and a second strip groove (313) is provided inside the bending section (312), and each of the second strip grooves (313) extends to an end of the bending section (312) away from the mounting main board (31).
4. The circuit breaker according to claim 3, characterized in that: One end of the bending section (312) away from the mounting main board (31) is arched, and the bending section (312) is elastic; when one end of the moving contact (2) presses the vertical arm (32), the bending section (312) is squeezed.
5. The circuit breaker according to claim 2, characterized in that: The circuit breaker further comprises a base (4), the base (4) being provided with a mounting groove (41), and the mounting main board (31) being arranged in the mounting groove (41).
6. The circuit breaker according to claim 2, characterized in that: The mounting main board (31) is provided with a first strip-shaped groove (311), and the first strip-shaped groove (311) extends to an end of the vertical arm (32) away from the mounting main board (31).
7. The circuit breaker according to claim 2, characterized in that: A first inclined surface (321) is provided at one end of the vertical arm (32) away from the mounting main board (31), and the first inclined surface (321) is arranged to be inclined toward the stationary contact (1).
8. The circuit breaker according to claim 7, characterized in that: One end of the moving contact (2) is provided with a second inclined surface (21) adapted to the first inclined surface (321).
9. The circuit breaker according to claim 1, characterized in that: One end of the moving contact (2) close to the blocking member (3) is an arc-shaped surface.
10. The circuit breaker according to any one of claims 1 to 9, characterized in that: The blocking member (3) is an integrated structural member.