Clapping type magnetic tripping mechanism and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a clapping type magnetic tripping mechanism and a circuit breaker. The clapping type magnetic tripping mechanism comprises a magnet yoke, a contact plate, an armature and a counter-force spring, one end of the armature is rotationally connected to the magnet yoke, the other end of the armature is connected to the counter-force spring, the counter-force spring can apply acting force to the armature so that the other end of the armature can be away from the magnet yoke, and the contact plate is arranged on the magnet yoke and located between the magnet yoke and the armature. An arc striking convex rib is arranged on the side face, away from the armature, of the magnet yoke and used for leading out electric arcs on the magnet yoke. According to the clapping type magnetic tripping mechanism, the arc striking convex rib is arranged on the side face, deviating from the armature, of the magnet yoke, so that electric arcs on the magnet yoke can be rapidly led out to the arc extinguishing chamber by the arc striking convex rib for arc extinguishing, the arc striking efficiency is improved, the influence of the electric arcs on the magnet yoke can be avoided, it is guaranteed that the magnet yoke can rapidly and stably attract the armature when a circuit is short-circuited, and the service life of the magnet yoke is prolonged. And the tripping stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a snap-on magnetic tripping mechanism and a circuit breaker. Background Art

[0002] The circuit breaker can automatically cut off the current when the current exceeds the trip setting. It has protection functions such as long delay for overload and instantaneous short circuit. It can also be used in conjunction with module units such as leakage current device, measurement, and electric operating mechanism.

[0003] The circuit breaker is provided with a magnetic tripping mechanism, which triggers the operating mechanism to trip the circuit breaker. The snap-on magnetic tripping mechanism is a commonly used magnetic tripping mechanism, which includes a yoke, a contact plate, an armature and a reaction spring. When a short circuit occurs in the circuit, the armature overcomes the force of the reaction spring and is attracted by the yoke, so that the armature drives the operating mechanism to trip and open the circuit. The existing snap-on magnetic tripping mechanism has a poor arc-starting effect, and the arc on the yoke cannot be led out to the arc extinguishing chamber in time, which affects the tripping effect of the snap-on magnetic tripping mechanism and the service life of the circuit breaker.

[0004] Therefore, there is an urgent need for a snap-on magnetic tripping mechanism and a circuit breaker to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a snap-on magnetic tripping mechanism and a circuit breaker, which can quickly lead out the arc on the magnetic yoke, thereby improving the tripping effect of the snap-on magnetic tripping mechanism and the service life of the circuit breaker.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A snap-on magnetic release mechanism comprises a yoke, a contact plate, an armature and a reaction spring, wherein one end of the armature is rotatably connected to the yoke, and the other end of the armature is connected to the reaction spring, and the reaction spring can exert a force on the armature to make the other end of the armature move away from the yoke, the contact plate is arranged on the yoke and located between the yoke and the armature, and an arc-starting rib is arranged on the side of the yoke facing away from the armature, and the arc-starting rib is used to lead out the arc on the yoke.

[0008] As an optional solution, the arc-starting rib crosses the magnetic yoke along the extension direction of the contact plate.

[0009] As an optional solution, the arc-starting rib is a protruding structure formed by stamping.

[0010] As an optional solution, the surface of the arc-inducing rib is a circular arc surface.

[0011] As an optional solution, the cross-section of the arc-striking rib is set to be triangular or trapezoidal, so as to form an arc-striking sharp corner at the end of the arc-striking rib.

[0012] As an optional solution, the arc-initiating rib is configured as a conical protrusion, and a plurality of the conical protrusions are provided, and the plurality of the conical protrusions are arranged along the extension direction of the contact plate.

[0013] As an optional solution, an arc-starting plate is provided at one end of the magnetic yoke facing the contact of the contact plate, and the arc-starting plate is bent toward one side of the arc-starting rib.

[0014] As an optional solution, the arc-starting plate gradually decreases in width from one end connected to the magnetic yoke to the other end.

[0015] As an optional solution, a connection terminal is provided at one end of the contact plate, a static contact is provided at the other end of the contact plate, and an arc striking angle is provided at the end provided with the static contact, and the arc striking plate is arranged toward the arc striking angle.

[0016] The circuit breaker comprises a housing, an arc extinguishing chamber, and also comprises the snap-on magnetic tripping mechanism as described above. The snap-on magnetic tripping mechanism and the arc extinguishing chamber are arranged in the housing, and the arc-striking rib is arranged toward the arc extinguishing chamber.

[0017] Beneficial effects:

[0018] The snap-on magnetic tripping mechanism proposed in the utility model provides arc-striking ribs on the side of the yoke away from the armature, so that the arc on the yoke can be quickly led out to the arc extinguishing chamber by the arc-striking ribs for arc extinguishing, thereby improving the arc-striking efficiency, thereby avoiding the influence of the arc on the yoke, ensuring that the yoke can quickly and stably attract the armature when a short circuit occurs in the circuit, thereby improving the tripping stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of a circuit breaker provided by an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the snap-on magnetic release mechanism provided by an embodiment of the utility model at one viewing angle;

[0021] Figure 3 It is a structural schematic diagram of the snap-on magnetic release mechanism provided by an embodiment of the utility model from another perspective.

[0022] In the figure:

[0023] 100, snap-on magnetic tripping mechanism; 200, housing; 300, arc extinguishing chamber; 400, operating mechanism;

[0024] 1. yoke; 11. bottom plate; 111. arc-starting rib; 112. arc-starting plate; 113. riveting hole; 12. enclosure plate; 121. mounting groove;

[0025] 2. Contact plate;

[0026] 3. Armature;

[0027] 4. Reaction spring. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships 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.

[0032] like Figure 1As shown, this embodiment provides a snap-on magnetic tripping mechanism 100 and a circuit breaker including the snap-on magnetic tripping mechanism 100. The circuit breaker also includes a housing 200, an arc extinguishing chamber 300 and an operating mechanism 400. The snap-on magnetic tripping mechanism 100, the arc extinguishing chamber 300 and the operating mechanism 400 are arranged in the housing 200. The snap-on magnetic tripping mechanism 100 is used to drive the operating mechanism 400 to trip and open the circuit breaker. In this embodiment, the snap-on magnetic tripping mechanism 100 is mainly improved. For other mechanisms of the circuit breaker, conventional structures in the prior art can be adopted, which will not be described in detail here.

[0033] Specifically, Figure 1 and Figure 2 As shown, the snap-on magnetic tripping mechanism 100 comprises a yoke 1, a contact plate 2, an armature 3 and a reaction spring 4, one end of the armature 3 is rotatably connected to the yoke 1, the other end of the armature 3 is connected to the reaction spring 4, the other end of the reaction spring 4 is connected to the housing 200, the reaction spring 4 can exert a force on the armature 3 to make the other end of the armature 3 away from the yoke 1, the contact plate 2 is arranged on the yoke 1 and located between the yoke 1 and the armature 3, and the side of the yoke 1 away from the armature 3 is provided with an arc-striking rib 111, and the arc-striking rib 111 is used to lead out the arc on the yoke 1. When the snap-on magnetic tripping mechanism 100 is assembled into the circuit breaker, the arc-striking rib 111 is arranged toward the arc extinguishing chamber 300, so that the arc-striking rib 111 leads the arc into the arc extinguishing chamber 300 to extinguish the arc.

[0034] By providing an arc-striking rib 111 on the side of the yoke 1 facing away from the armature 3, the arc on the yoke 1 can be quickly led out by the arc-striking rib 111 to the arc extinguishing chamber 300 for arc extinguishing, thereby improving the arc-striking efficiency, thereby avoiding the arc from affecting the yoke 1, ensuring that the yoke 1 can quickly and stably attract the armature 3 when a short circuit occurs in the circuit, thereby improving the tripping stability.

[0035] Furthermore, if Figure 3 As shown, the yoke 1 includes a bottom plate 11 and two enclosures 12, the two enclosures 12 are respectively arranged on opposite sides of the bottom plate 11, so that the yoke 1 forms a U-shaped structure, and the contact plate 2 is arranged inside the U-shaped structure and connected to the bottom plate 11. The enclosure 12 is arranged in an L-shape, and a mounting groove 121 is arranged at the corner of the L-shape. The armature 3 is inserted into the mounting groove 121 and can rotate in the mounting groove 121, so that the armature 3 is attracted to the enclosure 12 or forms an angle with the enclosure 12.

[0036] Alternatively, if Figure 3 As shown, the arc-striking rib 111 crosses the yoke 1 along the extension direction of the contact plate 2, and the extension direction of the contact plate 2 is also the direction from the connecting terminal to the static contact. The arc-striking rib 111 crosses the armature 3 to ensure that the arc-striking rib 111 has a larger arc-striking range, which is beneficial to improving the arc-striking effect.

[0037] In this embodiment, the arc-striking convex rib 111 is a protruding structure formed by stamping, that is, the arc-striking convex rib 111 is integrally formed with the yoke 1. Through stamping, the processing is relatively quick and convenient. Preferably, the surface of the arc-striking convex rib 111 is an arc surface, which is more convenient for stamping processing, and the arc-shaped arc-striking convex rib 111 can achieve a good arc-striking effect.

[0038] In other embodiments, the arc-striking convex rib 111 may also be provided with a triangular or trapezoidal cross section to form an arc-striking sharp corner at the end of the arc-striking convex rib 111. The arc-striking convex rib 111 gradually decreases in width from the end connected to the armature 3 to the end, and such a setting can make the arc-striking convex rib 111 have a better arc-striking effect. In actual processing, it can be processed by casting, grinding or milling.

[0039] Regarding the specific shape of the arc-striking rib 111, in other embodiments, the arc-striking rib 111 can also be set as a conical protrusion, and the conical protrusion is set in multiples, and the multiple conical protrusions are arranged along the extension direction of the contact plate 2, which can also achieve the arc-striking effect. It should be noted that the specific shape and arrangement of the arc-striking rib 111 are not limited here, as long as the arc on the yoke 1 can be drawn out.

[0040] Furthermore, if Figure 3 As shown, in order to improve the arc striking effect, an arc striking plate 112 is provided at one end of the yoke 1 facing the contact of the contact plate 2, and the arc striking plate 112 is bent toward one side of the arc striking rib 111, so that the arc can also be led out to the arc extinguishing chamber 300 along the arc striking plate 112. Specifically, the arc striking plate 112 is provided at one end of the bottom plate 11.

[0041] Optionally, the arc-striking plate 112 gradually decreases in width from one end connected to the yoke 1 to the other end, forming a sharp corner at the end of the arc-striking plate 112, thereby improving the arc-striking effect.

[0042] Furthermore, if Figure 3 As shown, a terminal is provided at one end of the contact plate 2, a static contact is provided at the other end of the contact plate 2, and an arc striking angle is provided at the end provided with the static contact, and the arc striking plate 112 is arranged toward the arc striking angle. The arc striking angle has substantially the same structure and shape as the arc striking plate 112, and the sharp corners of the two are arranged opposite to each other to better draw out the arc at the static contact.

[0043] Furthermore, if Figure 3As shown, in order to connect the contact plate 2 and the yoke 1, a riveting protrusion is provided on the contact plate 2, and a riveting hole 113 is provided on the yoke 1. The riveting protrusion can be inserted into the riveting hole 113. The riveting protrusion and the riveting hole 113 cooperate with each other, which can play a positioning role on the one hand, and on the other hand, the contact plate 2 and the yoke 1 can be riveted by punching the riveting protrusion. Specifically, two groups of riveting holes 113 and riveting protrusions are correspondingly provided to ensure that the contact plate 2 and the yoke 1 are firmly connected.

[0044] 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. The snap-on magnetic release mechanism is characterized by: The invention comprises a yoke (1), a contact plate (2), an armature (3) and a reaction spring (4); one end of the armature (3) is rotatably connected to the yoke (1); the other end of the armature (3) is connected to the reaction spring (4); the reaction spring (4) can exert an action force on the armature (3) so that the other end of the armature (3) is away from the yoke (1); the contact plate (2) is arranged on the yoke (1) and is located between the yoke (1) and the armature (3); an arc-striking rib (111) is arranged on the side of the yoke (1) facing away from the armature (3); the arc-striking rib (111) is used to induce an arc on the yoke (1).

2. The snap-on magnetic release mechanism according to claim 1, characterized in that: The arc-starting rib (111) crosses the magnetic yoke (1) along the extension direction of the contact plate (2).

3. The snap-on magnetic release mechanism according to claim 2, characterized in that: The arc-starting convex rib (111) is a convex structure formed by stamping.

4. The snap-on magnetic release mechanism according to claim 1, characterized in that: The surface of the arc-initiating convex rib (111) is an arc surface.

5. The snap-on magnetic release mechanism according to claim 1, characterized in that: The cross section of the arc-striking convex rib (111) is set to be triangular or trapezoidal, so as to form an arc-striking sharp corner at the end of the arc-striking convex rib (111).

6. The snap-on magnetic release mechanism according to claim 1, characterized in that: The arc-starting convex rib (111) is arranged as a conical protrusion, and a plurality of the conical protrusions are arranged, and the plurality of the conical protrusions are arranged in an array along the extension direction of the contact plate (2).

7. The snap-on magnetic tripping mechanism according to any one of claims 1 to 6, characterized in that: An arc-starting plate (112) is provided at one end of the magnetic yoke (1) facing the contact of the contact plate (2), and the arc-starting plate (112) is bent toward one side of the arc-starting rib (111).

8. The snap-on magnetic tripping mechanism according to claim 7, characterized in that: The arc-starting plate (112) has a width that gradually decreases from one end connected to the magnetic yoke (1) to the other end.

9. The snap-on magnetic release mechanism according to claim 8, characterized in that: A connection terminal is provided at one end of the contact plate (2), a static contact is provided at the other end of the contact plate (2), and an arc striking angle is provided at the end provided with the static contact, and the arc striking plate (112) is arranged towards the arc striking angle.

10. A circuit breaker, comprising a housing (200) and an arc extinguishing chamber (300), characterized in that: It also includes a snap-on magnetic tripping mechanism as described in any one of claims 1 to 9, wherein the snap-on magnetic tripping mechanism and the arc extinguishing chamber (300) are arranged in the housing (200), and the arc-striking rib (111) is arranged toward the arc extinguishing chamber (300).

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