Leakage tripping mechanism of small leakage protection circuit breaker
The modular design of the electromagnetic trip component in micro circuit breakers addresses the complexity and unreliability of N-line leakage protection modules by enhancing trip sensitivity and assembly efficiency, ensuring stable and efficient operation.
Patent Information
- Application Number
- CN202422334492.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The N-line leakage protection module of existing small leakage circuit breakers has complex structure and unstable tripping force, resulting in unreliable tripping performance and insensitive action.
The electromagnetic tripping components are adopted with modular design, including yoke, coil frame, static iron core, dynamic iron core, tie rod, tripping member, reset button and return spring. The assembly of the electromagnetic tripping member and the shell is realized through a modular structure. The static iron core attracts the moving iron core to drive the pull rod action, the pull rod drives the tripping member to rotate, and the pull rod pulls the lock to perform the trip action.
It achieves simple structure, stable and reliable performance, sensitive trip action and convenient assembly, and improves the assembly efficiency of the trip mechanism and the reliability and sensitivity of the trip action.
Smart Images
Figure CN223108816U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a leakage tripping mechanism of a small leakage protection circuit breaker. Background Art
[0002] At present, small circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of AC 50 / 60Hz rated voltage 230 / 400V and rated current not exceeding 125A lines. They can also be used for infrequent operation conversion of lines under normal circumstances. Small circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings. Small leakage circuit breakers are switches that can automatically operate when the leakage current in the circuit exceeds a predetermined value, which can protect the safety of people and electrical appliances. Small leakage circuit breakers include multiple L-line circuit breaker units and N-line leakage protection modules assembled with multiple L-line circuit breaker units. The structural design of the N-line leakage protection module of the existing leakage protection circuit breaker is relatively complex, and the tripping force of the leakage tripping mechanism of the N-line leakage protection module is unstable, resulting in unreliable tripping performance of the N-line leakage protection module and insensitive leakage tripping action. Summary of the invention
[0003] The utility model aims to overcome the defects of the prior art and provide a leakage tripping mechanism for a small leakage protection circuit breaker with simple structure, stable and reliable performance, sensitive tripping action and convenient assembly.
[0004] To achieve the above-mentioned purpose, the utility model adopts a leakage tripping mechanism of a small leakage protection circuit breaker, including a shell, an electromagnetic tripping assembly arranged in the shell and used to drive the lock of the L-line circuit breaker unit to perform a tripping action, the electromagnetic tripping assembly includes a yoke arranged in the shell, a coil frame arranged in the yoke, a coil arranged on the coil frame, a static iron core arranged in the coil frame, a moving iron core arranged in the coil frame and matched with the static iron core, a pull rod linked with the moving iron core, a tripping piece rotatably arranged in the shell and linked with the pull rod, a reset button arranged in the shell and matched with the tripping piece, and a reset spring arranged between the reset button and the shell, one end of the tripping piece has a positioning hole matched with the pull rod, one end of the pull rod has a positioning boss passing through the positioning hole and abutting on one side of the tripping piece, and forming a linkage cooperation between the tripping piece and the positioning boss, the other end of the tripping piece has a toggle rod matched with the lock, one side of the toggle rod abuts on the lock, and forming a linkage cooperation between the lock and the toggle rod.
[0005] The beneficial effects of the above structure are: the electromagnetic trip assembly adopts a modular structural design, which is conducive to the modular assembly of the electromagnetic trip assembly and the housing, and the assembly efficiency is higher. During operation, the static iron core attracts the moving iron core, the moving iron core drives the pull rod to move, the pull rod drives the release part to rotate, and the release part toggles the lock of the L-line circuit breaker unit to perform the tripping action, thereby realizing the rapid tripping of the leakage tripping mechanism. And the pull rod is engaged in the positioning hole of the tripping part through the positioning boss, which facilitates the assembly of the pull rod and the tripping part, and ensures that the transmission of the pull rod and the tripping part is more reliable, which is conducive to improving the sensitivity of the tripping action of the leakage tripping mechanism. Therefore, the leakage tripping mechanism has the advantages of simple structure, stable and reliable performance, sensitive tripping action, and convenient assembly.
[0006] In particular, one side of the toggle lever has an arc surface driving part matched with the lock catch, and the lock catch is provided with a bearing plane that conflicts with the arc surface driving part. The toggle lever pushes the bearing plane of the lock catch through the arc surface driving part, thereby ensuring that the toggle lever can reliably trigger the lock catch, which is beneficial to improving the tripping sensitivity of the leakage tripping mechanism.
[0007] In particular, one end of the reset button has a driving rod matched with the release member, the release member is provided with a limiting groove matched with the driving rod, the driving rod is engaged in the limiting groove, and constitutes a linkage match between the release member and the driving rod. The reset button is engaged in the limiting groove of the release member through the driving rod, thereby ensuring that the reset button can reliably drive the release member, which is conducive to improving the working reliability of the leakage release mechanism.
[0008] In particular, the housing is provided with a button hole matched with the reset button, one end of the reset button has a button portion passing through the button hole and extending outside the housing, the reset button is provided with a positioning groove, one end of the reset spring is engaged in the positioning groove, a limiting piece matched with the reset spring is provided in the housing, and the other end of the reset spring abuts against the limiting piece. The reset spring is engaged between the positioning groove of the reset button and the limiting piece of the housing, thereby ensuring that the reset button can operate reliably, which is conducive to improving the working reliability of the leakage tripping mechanism.
[0009] In particular, a rotating shaft hole is provided on the other end of the release member, a rotating shaft matching the rotating shaft hole is provided in the housing, the rotating shaft is inserted into the rotating shaft hole, and forms a rotating connection and cooperation between the release member and the rotating shaft. The release member is rotatably arranged on the rotating shaft of the housing, so as to facilitate the assembly of the release member and the housing, and the assembly is more convenient, and it can ensure that the release member can flexibly rotate on the rotating shaft, which is beneficial to improve the tripping action sensitivity of the leakage tripping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1This is the internal structure diagram of the small leakage protection circuit breaker in the embodiment of the present utility model.
[0011] Figure 2 This is the cross-sectional view of the small leakage protection circuit breaker in the embodiment of the present utility model.
[0012] Figure 3 This is the perspective view of the embodiment of the present utility model. Specific implementation manners
[0013] As Figures 1 to 3 shown, the embodiment of the present utility model is a leakage tripping mechanism of a small leakage protection circuit breaker, including a housing 10, and an electromagnetic tripping assembly 20 disposed in the housing 10 and used to drive the latch 12 of the L-line circuit breaker unit 11 to perform a tripping action. The electromagnetic tripping assembly 20 includes a yoke 21 disposed in the housing 10, a coil bobbin 22 disposed in the yoke 21, a coil 23 disposed on the coil bobbin 22, a stationary iron core 24 disposed in the coil bobbin 22, a moving iron core 25 disposed in the coil bobbin 22 and cooperating with the stationary iron core 24, a pull rod 26 linked and cooperated with the moving iron core 25, a detent 27 rotatably disposed in the housing 10 and linked and cooperated with the pull rod 26, a reset button 28 disposed in the housing 10 and cooperating with the detent 27, and a reset spring 29 disposed between the reset button 28 and the housing 10. One end of the detent 27 has a positioning hole 270 cooperating with the pull rod 26, and one end of the pull rod 26 has a positioning boss 261 passing through the positioning hole 270 and abutting against one side of the detent 27, and the detent 27 and the positioning boss 261 form a linked cooperation. The other end of the detent 27 has a toggle lever 271 cooperating with the latch 12. One side of the toggle lever 271 abuts against the latch 12, and the latch 12 and the toggle lever 271 form a linked cooperation. One side of the toggle lever 271 has an arc-shaped driving portion 2711 cooperating with the latch 12, and a bearing plane 121 cooperating with the arc-shaped driving portion 2711 is disposed on the latch 12. The toggle lever pushes the bearing plane of the latch through the arc-shaped driving portion, so as to ensure that the toggle lever can reliably trigger the latch, which is beneficial to improving the tripping sensitivity of the leakage tripping mechanism.
[0014] As Figure 1 、 3As shown, one end of the reset button 28 has a driving rod 281 that matches the release member 27, and the release member 27 is provided with a limiting groove 272 that matches the driving rod 281. The driving rod 281 is engaged in the limiting groove 272, and constitutes the linkage cooperation between the release member 27 and the driving rod 281. The reset button is engaged in the limiting groove of the release member through the driving rod, so that the reset button can reliably drive the release member, which is conducive to improving the working reliability of the leakage release mechanism. The housing 10 is provided with a button hole 101 matched with the reset button 28. One end of the reset button 28 has a button portion 282 that passes through the button hole 101 and extends outside the housing 10. The reset button 28 is provided with a positioning groove 283. One end of the reset spring 29 is engaged in the positioning groove 283. A limiting plate 102 matched with the reset spring 29 is provided in the housing 10. The other end of the reset spring 29 abuts against the limiting plate 102. The reset spring is engaged between the positioning groove of the reset button and the limiting plate of the housing, so that the reset button can be reliably operated, which is conducive to improving the working reliability of the leakage tripping mechanism. The other end of the release member 27 is provided with a rotating shaft hole 273. The housing 10 is provided with a rotating shaft 103 matched with the rotating shaft hole 273. The rotating shaft 103 is inserted in the rotating shaft hole 273 and constitutes a rotational connection and cooperation between the release member 27 and the rotating shaft 103. The release member is rotatably arranged on the rotating shaft of the housing, so as to facilitate the assembly of the release member and the housing, the assembly is more convenient, and it can ensure that the release member can flexibly rotate on the rotating shaft, which is beneficial to improving the tripping action sensitivity of the leakage tripping mechanism.
[0015] The electromagnetic trip assembly adopts a modular structural design, which is conducive to the modular assembly of the electromagnetic trip assembly and the housing, and the assembly efficiency is higher. During operation, the static iron core attracts the moving iron core, the moving iron core drives the pull rod to move, the pull rod drives the tripping piece to rotate, and the tripping piece toggles the lock of the L-line circuit breaker unit to perform the tripping action, thereby realizing the rapid tripping of the leakage tripping mechanism. The pull rod is engaged in the positioning hole of the tripping piece through the positioning boss, which facilitates the assembly of the pull rod and the tripping piece, and ensures that the transmission of the pull rod and the tripping piece is more reliable, which is conducive to improving the sensitivity of the tripping action of the leakage tripping mechanism. Therefore, the leakage tripping mechanism has the advantages of simple structure, stable and reliable performance, sensitive tripping action, and convenient assembly.
Claims
1. A leakage tripping mechanism for a small leakage protection circuit breaker, comprising a housing and an electromagnetic tripping component disposed within the housing and used to drive the L-line circuit breaker unit to perform a tripping action by unlocking, characterized in that: The electromagnetic tripping assembly described above includes a yoke disposed within a housing, a coil bobbin disposed within the yoke, a coil disposed on the coil bobbin, a stationary iron core disposed within the coil bobbin, a moving iron core disposed within the coil bobbin and cooperating with the stationary iron core, a pull rod in linkage cooperation with the moving iron core, a tripping member rotatably disposed within the housing and in linkage cooperation with the pull rod, a reset button disposed within the housing and cooperating with the tripping member, and a reset spring disposed between the reset button and the housing. One end of the tripping member has a positioning hole cooperating with the pull rod, and one end of the pull rod has a positioning boss passing through the positioning hole and abutting against one side of the tripping member, thereby forming a linkage cooperation between the tripping member and the positioning boss. The other end of the tripping member has a toggle rod cooperating with a latch, and one side of the toggle rod abuts against the latch, thereby forming a linkage cooperation between the latch and the toggle rod.
2. The leakage tripping mechanism of the miniature residual current circuit breaker according to claim 1, characterized in that: One side of the toggle rod has an arc-shaped driving portion cooperating with the latch, and a bearing plane abutting against the arc-shaped driving portion is provided on the latch.
3. The leakage tripping mechanism of the miniature leakage circuit breaker according to claim 1 or 2, characterized in that: One end of the reset button has a driving rod cooperating with the tripping member, and a limiting groove cooperating with the driving rod is provided on the tripping member. The driving rod is engaged in the limiting groove, thereby forming a linkage cooperation between the tripping member and the driving rod.
4. The leakage tripping mechanism of the miniature residual current circuit breaker according to claim 1 or 2, characterized in that: A button hole cooperating with the reset button is provided on the housing. One end of the reset button has a button portion passing through the button hole and extending outside the housing. A positioning groove is provided on the reset button. One end of the reset spring is engaged in the positioning groove. A limiting piece cooperating with the reset spring is provided within the housing, and the other end of the reset spring abuts against the limiting piece.
5. The leakage tripping mechanism of the miniature leakage protection circuit breaker according to claim 1 or 2, characterized in that: A shaft hole is provided at the other end of the tripping member, and a shaft cooperating with the shaft hole is provided within the housing. The shaft is inserted into the shaft hole, thereby forming a rotational connection cooperation between the tripping member and the shaft.