Circuit breaker
By installing a baffle inside the circuit breaker to block arc leakage, the problem of arc damage to the upper components is solved, ensuring the normal operating performance of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-20
AI Technical Summary
In existing circuit breakers, electric arcs tend to propagate upwards, damaging components such as the upper operating mechanism and affecting the circuit breaker's performance.
A baffle is installed inside the circuit breaker to prevent the electric arc from spreading upwards, and it is linked with the operating mechanism to avoid affecting the moving contacts.
It effectively prevents electric arc from damaging the components above, ensuring the performance of the circuit breaker, and does not affect the opening and closing action of the moving contact.
Smart Images
Figure CN224020645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a circuit breaker. BACKGROUND
[0002] When a circuit is cut off by a circuit breaker, an arc is generally generated between the contacts. The arc is a high-temperature, high-conductivity plasma, and thus the arc has a great destructive effect on the contacts. Moreover, the arc continues to maintain the connection of the circuit, and only when the arc is extinguished can the circuit be truly cut off. Therefore, the circuit breaker generally has a special arc extinguishing system to quickly and reliably extinguish the arc generated between the moving and static contacts of the circuit breaker, so as to ensure the normal operation of the circuit breaker.
[0003] In the existing circuit breaker, the arc extinguishing system is generally located at the bottom of the circuit breaker, and the contact system and the operating mechanism are sequentially arranged above the arc extinguishing system. In this way, the arc generated by the opening of the circuit breaker will overflow upwards and cause damage to the operating mechanism and other devices above, thereby affecting the performance of the circuit breaker. CONTENT OF THE UTILITY MODEL
[0004] The present application aims to solve the problem of arc overflow towards the upper part of the circuit breaker in the prior art, and ensure the performance of the circuit breaker.
[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:
[0006] In one aspect of the embodiments of the present application, a circuit breaker is provided, which comprises a base, an operating mechanism, a contact system and an arc extinguishing system are sequentially arranged in the base along a first direction, a baffle is arranged on the side of the arc extinguishing system facing the operating mechanism to block the movement of the arc towards the operating mechanism, and the baffle is linked with a mechanism seat of the operating mechanism.
[0007] Optionally, the baffle is matched with a shaft hole of the mechanism seat, one end of the baffle is formed with a mounting shaft, a mounting hole is arranged on the mechanism seat, and the mounting shaft and the mounting hole are matched to drive the baffle to move through the rotation of the mechanism seat.
[0008] Optionally, a guide surface is further formed in the base, a guide shaft is formed on the end of the baffle away from the mechanism seat, the guide shaft is located above the guide surface along the first direction, and when the mechanism seat drives the baffle to rotate, the guide shaft of the baffle moves along the guide surface.
[0009] Optionally, a first mounting hole and a second mounting hole are arranged on the mechanism seat, and the mounting shaft of the baffle sequentially passes through the first mounting hole and the second mounting hole to match with the mechanism seat.
[0010] Optionally, the first mounting hole is arranged away from the base, and the first mounting hole forms a gap.
[0011] Optionally, the baffle is arranged away from one end of the mechanism seat and provided with an elastic member, the baffle moves to a closed position along with the mechanism seat when closing, and the elastic member pushes the baffle to abut against the mechanism seat to move to an open position to block the electric arc when opening.
[0012] Optionally, two ends of the elastic member are connected to an inner wall of the base and an end of the baffle respectively.
[0013] Optionally, the baffle comprises a first baffle connected to the mechanism seat and a second baffle connected to the base, and the mechanism seat drives the first baffle to move to cooperate with the second baffle.
[0014] Optionally, the first baffle has a first cooperation surface, the second baffle has a second cooperation surface, the first cooperation surface and the second cooperation surface are arranged oppositely along the first direction, and the first cooperation surface is attached to the second cooperation surface when the first baffle moves towards the second baffle.
[0015] Optionally, in the first direction, a projection of the baffle covers at least projections of the contact system and the arc extinguishing system.
[0016] The beneficial effects of the present application include:
[0017] The present application provides a circuit breaker, a baffle is arranged above an arc extinguishing system to block the electric arc from overflowing upwards, which can effectively avoid damage to devices above caused by the electric arc, so as to ensure the performance of the circuit breaker. Moreover, the baffle and the mechanism seat of the operating mechanism are arranged in linkage, which can also avoid the influence of the baffle on the moving contact, so as to avoid affecting the opening and closing action of the moving contact. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 Fig. 1 is a structural schematic diagram of a circuit breaker according to an embodiment of the present application;
[0020] Figure 2 Fig. 2 is another structural schematic diagram of a circuit breaker according to an embodiment of the present application;
[0021] Figure 3A second schematic diagram of the structure of a circuit breaker with a baffle and a mechanism seat provided in an embodiment of this application;
[0022] Figure 4 This is one of the structural schematic diagrams of the cooperation between the baffle and the mechanism seat of a circuit breaker provided in an embodiment of this application;
[0023] Figure 5 This application provides a schematic diagram of the structure of a circuit breaker with a baffle and a base in cooperation.
[0024] Figure 6 A schematic diagram of the baffle structure of a circuit breaker according to an embodiment of this application;
[0025] Figure 7 One of the schematic diagrams of the baffle structure of a circuit breaker according to an embodiment of this application;
[0026] Figure 8 A second schematic diagram of the baffle structure of a circuit breaker according to an embodiment of this application;
[0027] Figure 9 This is a partial structural diagram of a circuit breaker provided in an embodiment of this application.
[0028] Icons: 10a-Base; 10a1-Guide surface; 10-Operating mechanism; 100-Mechanism seat; 100a-First mounting hole; 100b-Second mounting hole; 100c-Notch; 101-Lock; 11-Baffle; 110-Mounting shaft; 111-Guide shaft; 113-First baffle; 113a-First mating surface; 114-Second baffle; 114a-Second mating surface; 12-Contact system; 121-Moving contact; 122-Stationary contact; 13-Arc extinguishing system; 14-Elastic element; F1-First direction; F2-Second direction; D-Width. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[0031] It should be noted that like reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.
[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0033] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0034] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0035] Please refer to Figure 1 An aspect of the embodiment of the present application provides a circuit breaker, which comprises a base 10a, the base 10a is sequentially provided with an operating mechanism 10, a contact system 12 and an arc extinguishing system 13 along a first direction F1, the arc extinguishing system 13 is provided with a baffle 11 on the side facing the operating mechanism 10 to block the movement of the electric arc in the direction of the operating mechanism 10, and the baffle 11 is linked with a mechanism seat 100 of the operating mechanism 10.
[0036] The operating mechanism 10, the contact system 12 and the arc extinguishing system 13 are sequentially arranged in the base 10a along the first direction F1, the operating mechanism 10 is linked with the contact system 12, and the moving contact 121 and the static contact 122 of the contact system 12 are driven to open and close by the operating mechanism 10. The electric arc generated when the contact system 12 is opened enters the arc extinguishing system 13 below for arc extinguishing.
[0037] The arc in the prior art can overflow upwards, damaging the upper locking buckle 101, operating mechanism 10 and other devices. The present application sets a baffle 11 above the arc extinguishing system 13 to block the arc from overflowing upwards, which can avoid damage to the upper device by the arc and ensure the performance of the circuit breaker. Moreover, the baffle 11 and the mechanism seat 100 of the operating mechanism 10 are linked, which can also avoid the influence of the baffle 11 on the moving contact to avoid affecting the opening and closing action of the moving contact.
[0038] Specifically, as shown in Figure 2 , the baffle 11 is matched with the shaft hole of the mechanism seat 100, one end of the baffle 11 is formed with a mounting shaft 110, and the mechanism seat 100 is provided with a mounting hole, which is matched with the mounting shaft 110, so that the baffle 11 is driven to move by the rotation of the mechanism seat 100.
[0039] For example, the mechanism seat 100 is provided with a first mounting hole 100a and a second mounting hole 100b, as shown in Figure 3 , Figure 4 , the mounting shaft 110 of the baffle 11 passes through the first mounting hole 100a and the second mounting hole 100b in turn, so that the baffle 11 is rotatably connected with the mechanism seat 100 through the cooperation of the mounting shaft 110 and the first mounting hole 100a and the second mounting hole 100b.
[0040] For example, the first mounting hole 100a of the mechanism seat 100 is arranged away from the base 10a, and the first mounting hole 100a has a notch 100c, through which the mounting shaft 110 of the baffle 11 is inserted into the first mounting hole 100a.
[0041] The mounting shaft 110 of the baffle 11 is close to the mechanism seat 100 to be rotatably connected with the mechanism seat 100, and the end of the baffle 11 away from the mechanism seat 100 is also formed with a guide shaft 111, and the base 10a is also formed with a guide surface 10a1, as shown in Figure 5 , the guide shaft 111 is above the guide surface 10a1 along the first direction F1, and when the mechanism seat 100 drives the baffle 11 to rotate, the guide shaft 111 of the baffle 11 moves along the guide surface 10a1.
[0042] When the mechanism seat 100 rotates, the baffle 11 is driven to move by the mounting shaft 110 of the baffle 11, and at this time the guide shaft 111 of the baffle 11 moves away from the mechanism seat 100 along the guide surface 10a1, and the cooperation of the guide shaft 111 of the baffle 11 and the guide surface 10a1 of the base 10a can guide the movement of the baffle 11 to a certain extent, so that the baffle 11 can move along the guide surface 10a1 more easily.
[0043] In some embodiments, as Figure 6As shown, the baffle 11 is arranged on the inner wall of the base 10a, and the baffle 11 is provided with an elastic member 14 away from one end of the mechanism seat 100. When the circuit breaker is closed, the baffle 11 moves to the closed position with the mechanism seat 100. When the circuit breaker is opened, the elastic member 14 pushes the baffle 11 to abut against the mechanism seat 100 to move to the open position to block the electric arc.
[0044] For example, the elastic member 14 is a spring, and the two ends of the spring are connected to the inner wall of the base 10a and the end of the baffle 11 respectively. When the circuit breaker is closed, the mechanism seat 100 rotates to drive the baffle 11 to move towards the elastic member 14, and the baffle 11 compresses the elastic member 14. When the circuit breaker is opened, the elastic member 14 releases energy to reversely push the baffle 11 to move towards the mechanism seat 100. When the baffle 11 abuts against the mechanism seat 100, they move to the open position together. At this time, the baffle 11 plays a role in blocking the electric arc generated by the opening.
[0045] In the foregoing, the baffle 11 is arranged in one piece. In other embodiments, the baffle 11 can also be arranged in two pieces. Referring to Figure 7 、 Figure 8 As shown, the baffle 11 includes a first baffle 113 connected with the mechanism seat 100 and a second baffle 114 connected with the base 10a. The mechanism seat 100 drives the first baffle 113 to move to cooperate with the second baffle 114.
[0046] The first baffle 113 is connected with the mechanism seat 100, and the mechanism seat 100 rotates to drive the first baffle 113 to move towards the second baffle 114. The second baffle 114 is fixed in the base 10a. When the first baffle 113 moves towards the second baffle 114, the two baffles cooperate to block the electric arc.
[0047] The first baffle 113 has a first cooperating surface 113a, and the second baffle 114 has a second cooperating surface 114a. The first cooperating surface 113a and the second cooperating surface 114a are oppositely arranged along the first direction F1. When the first baffle 113 moves towards the second baffle 114, the first cooperating surface 113a and the second cooperating surface 114a are in contact. In this way, a block is formed in the first direction F1 to prevent the electric arc from overflowing upwards.
[0048] In addition, in the first direction F1, the projection of the baffle 11 covers at least the projections of the contact system 12 and the arc extinguishing system 13.
[0049] That is, the width D of the baffle 11 in the second direction F2 perpendicular to the first direction F1 is at least greater than the width of the contact system 12 and the arc extinguishing system 13 in the second direction F2, as Figure 9As shown, the baffle 11 has sufficient width D in the second direction F2 to cover the contact system 12 and the arc extinguishing system 13, so that the baffle 11 can completely block the arc passing through the baffle 11, and avoid the arc overflowing through the area of the baffle 11 which cannot be covered by the baffle 11 when the baffle 11 cannot cover the contact system 12 and the arc extinguishing system 13, so as to further ensure that the arc does not overflow upward, and thus ensure the working performance of the circuit breaker.
[0050] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art based on the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A circuit breaker, characterized in that, The system includes a base (10a), and an operating mechanism (10), a contact system (12), and an arc extinguishing system (13) are sequentially arranged in the base (10a) along a first direction (F1). The arc extinguishing system (13) has a baffle (11) on the side facing the operating mechanism (10) to block the electric arc from moving toward the operating mechanism (10). The baffle (11) is linked with the mechanism seat (100) of the operating mechanism (10).
2. The circuit breaker as described in claim 1, characterized in that, The baffle (11) is fitted with the shaft hole of the mechanism seat (100). One end of the baffle (11) is formed with a mounting shaft (110). The mechanism seat (100) is provided with a mounting hole. By matching the mounting shaft (110) with the mounting hole, the baffle (11) is moved by the rotation of the mechanism seat (100).
3. The circuit breaker as described in claim 2, characterized in that, A guide surface (10a1) is also formed inside the base (10a). A guide shaft (111) is formed at the end of the baffle (11) away from the mechanism seat (100). The guide shaft (111) is located above the guide surface (10a1) along the first direction (F1). When the mechanism seat (100) drives the baffle (11) to rotate, the guide shaft (111) of the baffle (11) moves along the guide surface (10a1).
4. The circuit breaker as described in claim 2, characterized in that, The mechanism base (100) is provided with a first mounting hole (100a) and a second mounting hole (100b). The mounting shaft (110) of the baffle (11) passes through the first mounting hole (100a) and the second mounting hole (100b) in sequence to cooperate with the mechanism base (100).
5. The circuit breaker as described in claim 4, characterized in that, The first mounting hole (100a) is disposed away from the base (10a), and the first mounting hole (100a) forms a notch (100c).
6. The circuit breaker according to any one of claims 1 to 5, characterized in that, An elastic element (14) is provided at one end of the baffle (11) away from the mechanism seat (100). When the circuit is closed, the baffle (11) moves with the mechanism seat (100) to the closed position. When the circuit is opened, the elastic element (14) pushes the baffle (11) to abut against the mechanism seat (100) and move to the open position to block the electric arc.
7. The circuit breaker as claimed in claim 6, characterized in that, The two ends of the elastic element (14) are respectively connected to the inner wall of the base (10a) and the end of the baffle (11).
8. The circuit breaker according to any one of claims 1 to 5, characterized in that, The baffle (11) includes a first baffle (113) connected to the mechanism seat (100) and a second baffle (114) connected to the base (10a). The mechanism seat (100) drives the first baffle (113) to move so as to cooperate with the second baffle (114).
9. The circuit breaker as claimed in claim 8, characterized in that, The first baffle (113) has a first mating surface (113a), and the second baffle (114) has a second mating surface (114a). The first mating surface (113a) and the second mating surface (114a) are arranged opposite to each other along the first direction (F1). When the first baffle (113) moves toward the second baffle (114), the first mating surface (113a) and the second mating surface (114a) are in contact.
10. The circuit breaker according to any one of claims 1 to 5, 7, and 9, characterized in that, In the first direction (F1), the projection of the baffle (11) at least covers the projections of the contact system (12) and the arc extinguishing system (13).