Molded case circuit breaker release instantaneous motion structure

Abstract

The utility model discloses an instantaneous motion structure of a release of a molded case circuit breaker. The device comprises a mounting seat, and an instantaneous motion structure is mounted in the mounting seat; the instantaneous motion structure is composed of a torsional spring, an armature, a support, a connecting shaft and a set screw, the armature is rotationally connected with the support through the connecting shaft, the torsional spring is connected with the connecting shaft in a sleeved mode, and the set screw is in threaded connection with the support. According to the utility model, a user can adjust the distance of the magnetic gap between the armature and the magnet yoke through the set screw, the instantaneous operating value of the release can be finely adjusted, and the instantaneous operating value of the release can be changed through different torsion values of the torsion spring.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker releases, in particular to an instantaneous structure of a molded case circuit breaker release. Background Art

[0002] A trip unit is a device mechanically connected to a circuit breaker, releasing the holding mechanism and automatically opening the circuit breaker. Its function is to prevent electric shock and leakage by generating a voltage across the transformer's secondary coil when the vector sum of the currents through the zero-sequence current transformer is not equal to zero due to a line leakage or electric shock. This voltage is amplified by an integrated circuit and, when the voltage reaches the set value, the leakage current release disconnects the power supply within 0.1 seconds, thereby providing protection against electric shock and leakage.

[0003] The instantaneous structure in the existing release requires the assistance of additional parts, which makes the operation of the instantaneous structure more complicated. The instantaneous structure needs the assistance of multiple parts to achieve the circuit protection effect when it is working. At the same time, the multiple parts in the instantaneous structure are not compact and reliable enough. When the instantaneous structure is working, the connections between the multiple parts are prone to detachment, making the release unable to play a protective role. In addition, the instantaneous action value in the existing release cannot be fine-tuned, and it is not easy to accurately adjust the distance between the traction rod and the tripping action point 15. Utility Model Content

[0004] The purpose of the present utility model is to provide a molded case circuit breaker release instantaneous structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a molded case circuit breaker release instantaneous structure, comprising:

[0006] A mounting seat, wherein a snap-action structure is installed inside the mounting seat;

[0007] The instantaneous structure is composed of a torsion spring, an armature, a bracket, a connecting shaft and a set screw. The armature is rotatably connected to the bracket through the connecting shaft, the torsion spring is sleeved with the connecting shaft, and the set screw is threadedly connected to the bracket.

[0008] By adopting the above technical solution, the instantaneous structure can change the instantaneous working value of the release through torsion springs of different types, and the magnetic gap between the armature and the yoke can be adjusted by tightening the screw, so that the instantaneous action value of the release can be fine-tuned. Without the use of additional parts, the instantaneous action value of the release can be adjusted by the torsion spring.

[0009] Preferably, a first screw and a second screw are respectively provided at the bottom and one end of the mounting seat, and a connecting plate is installed inside the mounting seat through the first screw and the second screw.

[0010] By adopting the above technical solution, the connecting plate is stably and firmly mounted inside the mounting seat by the first screw and the second screw, thereby preventing the connecting plate from falling off from the mounting seat during operation.

[0011] Preferably, a magnetic yoke is installed at the bottom end of the interior of the mounting seat, and a magnetic gap is provided between the magnetic yoke and the bottom of the armature in the instantaneous structure.

[0012] Preferably, a traction rod is rotatably mounted on the top of the mounting seat, and a tripping point is provided on the top of the armature.

[0013] By adopting the above technical solution, when the armature rotates clockwise, the magnetic gap between the yoke and the armature is reduced until they contact each other. The tripping point on the armature strikes the traction rod, causing it to rotate clockwise around the axis, and the release is activated, thereby tripping the circuit breaker.

[0014] Preferably, a first U-shaped hook and a second U-shaped hook are respectively provided at both ends of the torsion spring.

[0015] By adopting the above technical solution, the first U-shaped hook and the second U-shaped hook on the torsion spring are hung on the armature and the bracket respectively. When the armature rotates in the bracket, the tension of the torsion spring caused by the pulling of the first U-shaped hook and the second U-shaped hook is equal to the electromagnetic field between the yoke and the armature, so that the position of the armature on the bracket is fixed. When the current exceeds the instantaneous action value of the release, the torsion spring drives the armature to rotate so that the tripping action point strikes the traction rod.

[0016] Preferably, the installation position of the connecting plate is located inside the magnetic yoke, the connecting plate is Z-shaped and connection holes are provided at both ends of the top of the connecting plate.

[0017] By adopting the above technical solution, the connection hole on the connecting plate is connected to the circuit in the circuit breaker, so that the current passing through the connecting plate can act on the armature and the yoke.

[0018] Preferably, a threaded hole is provided at the other end of the bracket, and the bracket is threadedly connected to the set screw through the threaded hole. Connecting holes are provided on both sides of the armature and the bracket, and the armature is rotatably connected to the bracket through the connecting hole and the connecting shaft.

[0019] By adopting the above technical solution, the user can fine-tune the angle of rotation of the armature by tightening the screw, and the armature can rotate along the rotation center point on the connecting shaft as the center point.

[0020] Preferably, there are multiple instantaneous structures inside the mounting seat and they are arranged at equal distances.

[0021] By adopting the above technical solution, the wiring terminals on the circuit breaker correspond to the instantaneous structure.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The instantaneous structure of the molded case circuit breaker release is composed of an armature, a bracket, a connecting shaft, a yoke, a connecting plate and a set screw. The simple parts can achieve a circuit protection effect, and the parts in the instantaneous structure can be fixed by screws and the connecting shaft. In addition, the multiple parts in the instantaneous structure are assembled more compactly and reliably, avoiding the situation where parts are detached when the instantaneous structure is working.

[0024] The instantaneous action structure of the molded case circuit breaker release allows the user to adjust the distance between the magnetic gap between the armature and the yoke by tightening the screw, which can fine-tune the instantaneous action value of the release. The instantaneous action value of the release can also be changed by varying the torsion value of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the main view of the utility model;

[0026] Figure 2 This is the rear view of the utility model;

[0027] Figure 3 This is a side structural sectional view of the utility model;

[0028] Figure 4 This is a three-dimensional diagram of the instantaneous structure of the utility model;

[0029] Figure 5 This is the three-view drawing of the instantaneous torsion spring of the utility model;

[0030] Figure 6 This is a three-dimensional diagram of the armature of the present utility model;

[0031] Figure 7 This is a three-dimensional diagram of the magnetic yoke of the present invention;

[0032] Figure 8 This is a three-dimensional diagram of the connecting plate of the present utility model.

[0033] In the figure: 1. torsion spring; 2. armature; 3. bracket; 4. connecting shaft; 5. first screw; 6. yoke; 7. connecting plate; 8. mounting seat; 9. second screw; 10. set screw; 11. first U-shaped hook; 12. second U-shaped hook; 13. rotation center; 14. magnetic gap; 15. tripping point; 16. traction rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1-8 The present invention provides an embodiment of a molded case circuit breaker release instantaneous structure, comprising:

[0036] Mounting seat 8, wherein a snap-action structure is installed inside the mounting seat 8;

[0037] The instantaneous structure consists of a torsion spring 1, an armature 2, a bracket 3, a connecting shaft 4 and a set screw 10. The armature 2 is rotatably connected to the bracket 3 through the connecting shaft 4, the torsion spring 1 is sleeved with the connecting shaft 4, and the set screw 10 is threadedly connected to the bracket 3.

[0038] The instantaneous structure can change the instantaneous working value of the release by using different types of torsion springs 1, and the magnetic gap 14 between the armature and the yoke 6 can be adjusted by the set screw 10 to fine-tune the instantaneous action value of the release. Without the use of additional parts, the adjustment of the instantaneous action value of the release can be achieved through the torsion spring 1.

[0039] In this embodiment, a first screw 5 and a second screw 9 are respectively provided at the bottom and one end of the mounting seat 8, and a connecting plate 7 is installed inside the mounting seat 8 through the first screw 5 and the second screw 9. The connecting plate 7 is stably and firmly installed inside the mounting seat 1 through the first screw 5 and the second screw 9 to prevent the connecting plate 7 from falling off from the mounting seat 8 during operation.

[0040] In this embodiment, a magnetic yoke 6 is installed at the bottom end of the mounting seat 8 , and a magnetic gap 14 is provided between the magnetic yoke 6 and the bottom of the armature 2 in the instantaneous structure.

[0041] In this embodiment, a traction rod 16 is rotatably mounted on the top of the mounting base 8, and a tripping point 15 is provided on the top of the armature 2. When the armature 2 rotates clockwise, the magnetic gap 14 between the yoke 6 and the armature 2 is reduced until they contact each other. The tripping point 15 on the armature 2 strikes the traction rod 16, causing it to rotate clockwise around the axis, and the tripper is activated, thereby tripping the circuit breaker.

[0042] In this embodiment, a first U-shaped hook 11 and a second U-shaped hook 12 are respectively provided at both ends of the torsion spring 1. The first U-shaped hook 11 and the second U-shaped hook 12 on the torsion spring 1 are respectively hung on the armature 2 and the bracket 3. When the armature 2 rotates in the bracket 3, the pulling force of the torsion spring 1 caused by the first U-shaped hook 11 and the second U-shaped hook 12 is equal to the electromagnetic field between the yoke 6 and the armature 2, so that the position of the armature 2 on the bracket 3 is fixed. When the current exceeds the instantaneous action value of the release, the torsion spring 1 drives the armature 2 to rotate so that the tripping action point 15 strikes the traction rod 16.

[0043] In this embodiment, the installation position of the connecting plate 7 is located inside the yoke 6. The connecting plate 7 is Z-shaped and connection holes are provided at both ends of the top of the connecting plate 7. The connection holes on the connecting plate 7 are connected to the circuit inside the circuit breaker, so that the current passing through the connecting plate 7 can act on the armature 2 and the yoke 6.

[0044] In this embodiment, a threaded hole is provided at the other end of the bracket 3, and the bracket 3 is threadedly connected to the set screw 10 through the threaded hole. Connecting holes are provided on both sides of the armature 2 and the bracket 3. The armature 2 is rotatably connected to the bracket 3 through the connecting hole and the connecting shaft 4. The user can fine-tune the rotation angle of the armature 2 through the set screw 10, and the armature 2 can rotate along the rotation center point 13 on the connecting shaft 4 as the center point.

[0045] In this embodiment, there are multiple instantaneous structures inside the mounting base 8 and they are arranged at equal intervals, and the wiring terminals on the circuit breaker correspond to the instantaneous structures.

[0046] Working principle: When current passes through the connecting plate 7, the yoke 6 surrounding the connecting plate 7 and the armature 2 are attracted to each other due to the electromagnetic field. When the current exceeds the instantaneous action value of the release, the armature 2 rotates clockwise around the rotation index 13, and the magnetic gap 14 between the armature 2 and the yoke 6 decreases until they contact each other. The tripping point 15 on the armature 2 strikes the traction rod 16, causing it to rotate clockwise around the axis, and the release is activated, thereby tripping the circuit breaker.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or scope of the present invention. Therefore, the embodiments of the present invention are illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and scope of equivalents of the claims be encompassed within the present invention. Any reference numerals in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A molded case circuit breaker release instantaneous structure, characterized in that: include: A mounting seat (8), wherein a snap-action structure is installed inside the mounting seat (8); A snap-action structure is provided, the snap-action structure comprising a torsion spring (1), an armature (2), a bracket (3), a connecting shaft (4) and a set screw (10); the armature (2) is rotatably connected to the bracket (3) via the connecting shaft (4); the torsion spring (1) is sleeved with the connecting shaft (4); and the set screw (10) is threadedly connected to the bracket (3).

2. The instantaneous structure of a molded case circuit breaker release according to claim 1, characterized in that: A first screw (5) and a second screw (9) are respectively provided at the bottom and one end of the mounting seat (8), and a connecting plate (7) is installed inside the mounting seat (8) via the first screw (5) and the second screw (9).

3. The instantaneous structure of a molded case circuit breaker release according to claim 1, characterized in that: A magnetic yoke (6) is installed at the bottom end inside the mounting seat (8), and a magnetic gap (14) is provided between the magnetic yoke (6) and the bottom of the armature (2) in the instantaneous structure.

4. The instantaneous structure of a molded case circuit breaker release according to claim 1, characterized in that: A traction rod (16) is rotatably mounted on the top of the mounting seat (8), and a tripping action point (15) is provided on the top of the armature (2).

5. The instantaneous structure of a molded case circuit breaker release according to claim 1, characterized in that: A first U-shaped hook (11) and a second U-shaped hook (12) are respectively provided at both ends of the torsion spring (1).

6. The instantaneous structure of a release of a molded case circuit breaker according to claim 1, characterized in that: The installation position of the connecting plate (7) is located inside the magnetic yoke (6), the connecting plate (7) is Z-shaped, and both ends of the top of the connecting plate (7) are provided with connection holes.

7. The instantaneous structure of a molded case circuit breaker release according to claim 1, characterized in that: A threaded hole is provided at the other end of the bracket (3), and the bracket (3) is threadedly connected to the set screw (10) through the threaded hole. Connecting holes are provided on both sides of the armature (2) and the bracket (3), and the armature (2) is rotatably connected to the bracket (3) through the connecting hole and the connecting shaft (4).

8. The instantaneous structure of a release of a molded case circuit breaker according to claim 1, characterized in that: There are multiple instantaneous structures inside the mounting seat (8) and they are arranged at equal distances.

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