An operating mechanism for a circuit breaker

Abstract

The utility model belongs to circuit breaker technical field especially relates to a kind of operating mechanism of circuit breaker, including circuit breaker shell, be provided with static contact on the circuit breaker shell, further include: operating handle, rotatably installed on shell;Moving contact, swingably installed in shell, and be equipped with article slot on moving contact;Linkage assembly, installed in shell and is connected with operating handle, for driving moving contact swing;Linkage assembly includes first torsional spring, first torsional spring is installed in article slot and two ends are connected with shell and moving contact respectively, for controlling moving contact and static contact contact or separate;The utility model has the beneficial effects that article slot and mounting hole are equipped on moving contact, the positioning installation of first torsional spring is realized, so that moving contact can directly pre-install first torsional spring on moving contact before being installed into shell and being used, reduce subsequent installation step, improve installation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to an operating mechanism for a circuit breaker. Background Technology

[0002] Miniature circuit breakers, also known as micro circuit breakers, are characterized by advanced structure, reliable performance, strong breaking capacity, and compact size. They can be used for overload and short-circuit protection of lighting, power distribution lines and equipment, as well as for infrequent switching and connection operations of lines.

[0003] Currently, most miniature circuit breakers use springs to provide final pressure to the moving contact. Because the moving contact and shaft can slide and rotate relative to each other, the spring extends and retracts, displacing the latch and ensuring the circuit breaker's operating performance. However, since the movement of the moving contact causes the spring to deform in a non-linear fashion, it can easily lead to unbalanced spring forces, poor fatigue strength, and a tendency to fail, resulting in a short service life.

[0004] Therefore, in existing technologies, torsion springs are also used as elastic elements to provide final pressure to the moving contact. Although compared to spring structures, they can better adapt to the sliding and rotating movements of the moving contact, reduce irregular forces, and ensure stable and reliable operation, the installation of torsion springs in the circuit breaker housing usually requires mounting on a fixed shaft to prevent accidental detachment. This results in the need to install the torsion spring first, and then install the moving contact in the circuit breaker housing, while ensuring a proper fit between the torsion spring and the moving contact. This makes the assembly process cumbersome and inefficient. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing an operating mechanism for a circuit breaker.

[0006] In view of this, the present invention provides an operating mechanism for a circuit breaker, including a circuit breaker housing, wherein a stationary contact is provided on the circuit breaker housing, and further comprising: The operating handle is rotatably mounted on the housing; The moving contact is oscillatingly mounted inside the housing, and a storage slot is provided on the moving contact; The linkage component, installed inside the housing and connected to the operating handle, is used to drive the moving contact to swing. The linkage component includes a first torsion spring, which is installed in the storage slot and its two ends are respectively connected to the housing and the moving contact, and is used to control the moving contact and the stationary contact to contact or separate.

[0007] Furthermore, the storage slot includes a limiting part, which is arc-shaped and adapted to the first torsion spring structure.

[0008] Furthermore, a fixed shaft is provided on the circuit breaker housing, and a connecting through hole is provided on the moving contact. The fixed shaft passes through the connecting through hole and is movably connected to the connecting through hole.

[0009] Furthermore, the first torsion spring is sleeved on the fixed shaft.

[0010] Furthermore, the linkage components also include: The latch is rotatably mounted on a fixed shaft. The second torsion spring is mounted on the fixed shaft; The jumper is rotatably mounted on the moving contact and connected to the operating handle; The second torsion spring is used to drive the latch and the jumper to remain locked.

[0011] The beneficial effects of this utility model are: 1. A groove and a mounting hole are provided on the moving contact. The first torsion spring is placed in the groove, and one end of the first torsion spring is inserted into the mounting hole to achieve positioning and installation of the first torsion spring. This structural design allows the first torsion spring, which controls the contact or separation of the moving and stationary contacts, to be pre-installed on the moving contact before it is installed into the housing for use, reducing subsequent installation steps and improving installation efficiency.

[0012] 2. While the first torsion spring is installed in the storage slot, the limiting part of the storage slot can limit the first torsion spring to prevent it from shifting in the storage slot and avoid the first torsion spring from falling out of the storage slot due to vibration or impact. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the circuit breaker of this utility model; Figure 2 This is a schematic diagram of the structure of the moving contact of this utility model; Figure 3 This is an exploded view of a partial structure of this utility model; The markings in the diagram are as follows: 1. Circuit breaker housing; 11. Stationary contact; 12. Fixed shaft; 2. Operating handle; 3. Moving contact; 31. Storage slot; 32. Limiting part; 33. Connecting through hole; 34. Mounting hole; 4. First torsion spring; 5. Locking latch; 6. Second torsion spring; 7. Jumper latch; 8. Linkage rod. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0016] Example 1: This embodiment provides an operating mechanism for a circuit breaker, including a circuit breaker housing 1, on which a stationary contact 11 is disposed, and further comprising: Operating handle 2 is rotatably mounted on the housing; The movable contact 3 is swayably mounted inside the housing, and a storage groove 31 is provided on the movable contact 3; The linkage component is installed inside the housing and connected to the operating handle 2, and is used to drive the moving contact 3 to swing. The linkage component includes a first torsion spring 4, which is installed in the storage slot 31 and connected at both ends to the housing and the moving contact 3, respectively, to control the moving contact 3 and the stationary contact 11 to contact or separate.

[0017] In this technical solution, by rotating the operating handle 2, the linkage component is driven to swing the moving contact 3, so that the moving contact can contact and separate from the stationary contact on the housing, thereby realizing the connection and disconnection of the circuit.

[0018] A storage groove 31 and a mounting hole 34 are provided on the moving contact 3. The first torsion spring 4 is placed in the storage groove 31, and one end of the first torsion spring 4 is inserted into the mounting hole 34 to achieve positioning and installation of the first torsion spring 4. Through this structural design, before the moving contact 3 is installed into the housing for use, the first torsion spring 4, which is used to control the contact or separation between the moving contact 3 and the stationary contact 11, can be directly pre-installed on the moving contact 3, making the first torsion spring 3 and the moving contact 3 a whole component, which facilitates subsequent installation and use and improves installation efficiency.

[0019] Furthermore, the storage slot 31 includes a limiting part 32, which is arc-shaped and structurally compatible with the first torsion spring 4. This structural design allows the first torsion spring 4 to be installed within the storage slot 31 while the limiting part 32 of the storage slot 31 limits its movement, preventing displacement and avoiding detachment due to vibration or impact.

[0020] Example 2: This embodiment provides an operating mechanism for a circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0021] Furthermore, a fixed shaft 12 is provided on the circuit breaker housing 1, and a connecting through hole 33 is provided on the moving contact 3. The fixed shaft 12 passes through the connecting through hole 33 and is movably connected to the connecting through hole 33. Through this structural design, the moving contact 3 can swing when driven by the linkage component, realizing contact and separation with the stationary contact.

[0022] Furthermore, the first torsion spring 4 is sleeved on the fixed shaft 12. This structural design enhances the stability of the first torsion spring 4 during use and prevents unnecessary displacement of the first torsion spring 4 during operation.

[0023] Furthermore, the linkage assembly also includes a latch 5, a second torsion spring 6, and a trip latch 7. The latch 5 is rotatably mounted on the fixed shaft 12, and the second torsion spring 6 is also mounted on the fixed shaft 12. The trip latch 7 is rotatably mounted on the moving contact 3 and is connected to the operating handle 2 via a linkage rod 8. Through this structural design, when the circuit is in a normal connected state, the latch 5 and the trip latch 7 form a locking engagement through the elastic force of the second torsion spring 6, ensuring that the moving contact 3 and the stationary contact 11 remain in close contact when the circuit is closed, maintaining circuit continuity. When the tripping mechanism inside the circuit breaker detects a fault, the latch 5 rotates under external force, releasing the lock between itself and the trip latch 7. The elastic force of the second torsion spring 6 drives the latch 5 to quickly disengage from the trip latch 7, causing the moving contact to quickly separate from the stationary contact under the action of the first torsion spring 4, thus cutting off the circuit.

[0024] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An operating mechanism for a circuit breaker, comprising a circuit breaker housing (1), wherein a stationary contact (11) is disposed on the circuit breaker housing (1), characterized in that, Also includes: The operating handle (2) is rotatably mounted on the housing; The movable contact (3) is swayably installed inside the housing, and a storage groove (31) is provided on the movable contact (3). The linkage component is installed inside the housing and connected to the operating handle (2) to drive the moving contact (3) to swing. The linkage component includes a first torsion spring (4), which is installed in the storage slot (31) and its two ends are respectively connected to the housing and the moving contact (3) to control the moving contact (3) and the stationary contact (11) to come into contact or separate.

2. The operating mechanism of a circuit breaker according to claim 1, characterized in that, The storage slot (31) includes a limiting part (32), which is arc-shaped and adapted to the structure of the first torsion spring (4).

3. The operating mechanism of a circuit breaker according to claim 1, characterized in that, The circuit breaker housing (1) is provided with a fixed shaft (12), and the moving contact (3) is provided with a connecting through hole (33). The fixed shaft (12) passes through the connecting through hole (33) and is movably connected to the connecting through hole (33).

4. The operating mechanism of a circuit breaker according to claim 3, characterized in that, The first torsion spring (4) is sleeved on the fixed shaft (12).

5. The operating mechanism of a circuit breaker according to claim 3, characterized in that, The linkage component also includes: The latch (5) is rotatably mounted on the fixed shaft (12). The second torsion spring (6) is mounted on the fixed shaft (12); The jumper (7) is rotatably mounted on the moving contact (3) and connected to the operating handle (2); The second torsion spring (6) is used to drive the latch (5) and the jumper (7) to remain locked.

Images