Breaker rotating shaft buffer unloading structure

Abstract

The utility model provides a breaker rotating shaft buffer force unloading structure, comprising a rotating shaft, a stop block, an elastic member and a gas blocking cover, the stop block is movably installed on the rotating shaft and is used for abutting against a cooperation block on an installation segment; the elastic piece is arranged between the stop block and the rotating shaft and located on the side, away from the matching block, of the stop block. During breaking, the matching block of the moving contact impacts the stop block and then extrudes the elastic piece, so that the impact force of the moving contact is buffered, and the service life of the rotating shaft is prolonged; besides, on one hand, the gas blocking cover can prevent electric arc from climbing backwards along the moving contact and prevent the contact from being burnt out, and on the other hand, particulate matter and high-temperature gas can be prevented from damaging the blocking block and a conductive system, so that the reliability of the circuit breaker section test is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker shaft buffer and force relief structure. Background Technology

[0002] Existing circuit breakers include a rotating shaft and a moving contact mounted on the rotating shaft. The moving contact is driven by the rotating shaft to achieve rapid opening and closing. However, in scenarios with high breaking capacity or frequent operation, the impact force generated when the moving contact breaks will act on a local area of ​​the rotating shaft. Under long-term impact load, the rotating shaft is prone to cracks or even breakage, thereby shortening the service life of the circuit breaker. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects of the existing technology, such as the shaft being easily broken by the impact of the moving contact and the product having a short service life, so as to provide a circuit breaker shaft buffer unloading structure with a long service life.

[0004] Therefore, this utility model provides a circuit breaker shaft buffer unloading structure, including a shaft, a stop block, and an elastic element. The shaft is equipped with a moving contact, which has an installation section, a connecting section, and a contact section connected in sequence. The installation section is assembled with the shaft, and the contact section is equipped with a moving contact. The stop block is movably installed on the shaft and is used to abut against a mating block on the installation section. The elastic element is disposed between the stop block and the shaft, and the elastic element is located on the side of the stop block away from the mating block.

[0005] The rotating shaft includes two oppositely arranged mounting plates, each with a corresponding elongated hole. The stop block is installed between the two mounting plates and has connecting shafts at both ends that extend into the elongated holes. The connecting shafts can move within the elongated holes.

[0006] The elastic element is a spring.

[0007] The stop block is formed with a first positioning groove into which one end of the spring extends, and the rotating shaft is formed with a second positioning groove into which the other end of the spring extends.

[0008] It also includes an air baffle, which has a first cover portion assembled with the moving contact connection section, and a second cover portion integrally connected to the first cover portion and extending between the rotating shaft and the circuit breaker base.

[0009] The first cover is U-shaped, and the two vertical plates of the U-shaped first cover are assembled with the connecting section by rivets.

[0010] The rotating shaft is formed with a movable groove for the connecting section to swing, and the second cover has an air-blocking part extending outward from one end connected to the vertical plate to cover the movable groove.

[0011] The second cover has an arc-shaped structure.

[0012] The technical solution of this utility model has the following advantages:

[0013] 1. The circuit breaker shaft buffer unloading structure provided by this utility model includes a shaft, a stop block and an elastic element. When the circuit is broken, the mating block of the moving contact impacts the stop block and then squeezes the elastic element, thereby buffering the impact force of the moving contact and extending the service life of the shaft.

[0014] 2. The circuit breaker shaft buffer unloading structure provided by this utility model includes two oppositely arranged mounting plates, with corresponding elongated holes on the two mounting plates. During assembly, the connecting shafts at both ends of the stop block are inserted into the corresponding elongated holes, allowing the connecting shafts to move within the elongated holes, thereby allowing the stop block to move relative to the shaft. In addition, even if the stop block is damaged, only the stop block needs to be replaced, reducing maintenance and replacement costs.

[0015] 3. The circuit breaker shaft buffer unloading structure provided by this utility model has a gas baffle with a first cover part assembled with the moving contact connection section, and a second cover part integrally connected with the first cover part and extending to the space between the shaft and the circuit breaker base. The gas baffle can prevent the electric arc from climbing back along the moving contact and burning the contact. On the other hand, it can prevent particulate matter and high-temperature gas from damaging the baffle and conductive system (such as flexible connection), thus ensuring the reliability of the circuit breaker sectional test. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the circuit breaker shaft buffer force relief structure of this utility model.

[0018] Figure 2 for Figure 1 The main view;

[0019] Figure 3 for Figure 1 Cross-sectional view;

[0020] Figure 4 This is an exploded structural diagram of the shaft, stop, and elastic element.

[0021] Figure 5 This is a cross-sectional view of the circuit breaker;

[0022] Figure 6 This is an exploded structural diagram of the circuit breaker shaft buffer and stress relief structure.

[0023] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 2. Moving contact; 3. Mounting section; 4. Connecting section; 5. Contact section; 6. Moving contact; 7. Stop block; 8. Mating block; 9. Elastic element; 10. Mounting plate; 11. Elongated hole; 12. Connecting shaft; 13. First positioning groove; 14. Second positioning groove; 15. Gas baffle; 16. First cover; 17. Second cover; 18. Circuit breaker base; 19. Vertical plate; 20. Rivet; 21. Movable groove; 22. Gas baffle. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example

[0029] This embodiment provides a circuit breaker shaft buffer stress relief structure, such as Figure 3As shown, it includes a rotating shaft 1, a stop block 7, an elastic element 9, and an air baffle 15.

[0030] Rotating shaft 1, equipped with moving contact 2, such as Figure 2 and Figure 3 As shown, the moving contact 2 has a mounting section 3, a connecting section 4, and a contact section 5 connected in sequence. The mounting section 3 is assembled with the rotating shaft 1, and the contact section 5 is equipped with a moving contact 6. The rotating shaft 1 includes two oppositely arranged mounting plates 10, and the two mounting plates 10 are respectively provided with elongated holes 11.

[0031] The stop block 7 is movably mounted on the rotating shaft 1 and is used to abut against the mating block 8 on the mounting section 3. The stop block 7 is installed between the two mounting plates 10, as shown below. Figure 4 As shown, the device has connecting shafts 12 at both ends that extend into the elongated holes 11, and the connecting shafts 12 can move within the elongated holes 11. It should be noted that the connecting shafts 12 can be integrally formed with the stop block 7, or the stop block 7 can be mounted on the rotating shaft 1 through the connecting shaft 12.

[0032] An elastic element 9 is disposed between the stop block 7 and the rotating shaft 1, and the elastic element 9 is located on the side of the stop block 7 away from the mating block 8. The elastic element 9 is a spring, such as... Figure 4 and Figure 6 As shown, the stop block 7 is formed with a first positioning groove 13 into which one end of the spring extends, and the rotating shaft 1 is formed with a second positioning groove 14 into which the other end of the spring extends.

[0033] Air deflector 15, such as Figure 1 , Figure 5 and Figure 6 As shown, it has a first cover 16 assembled with the connecting section 4 of the moving contact 2, and a second cover 17 integrally connected to the first cover 16 and extending between the rotating shaft 1 and the circuit breaker base 18. The first cover 16 is U-shaped, and the two vertical plates 19 of the U-shaped first cover 16 are assembled with the connecting section 4 by rivets 20. The rotating shaft 1 is formed with a movable groove 21 for the connecting section 4 to swing. The second cover 17 has an air-blocking part 22 extending outward from the end connected to the vertical plate 19 to block the movable groove 21, thereby preventing electric arc from entering the rear of the rotating shaft from the movable groove. In this embodiment, the second cover 17 has an arc-shaped structure.

[0034] The circuit breaker shaft buffer unloading structure provided by this utility model includes a shaft 1, a stop block 7 and an elastic element 9. When the circuit is broken, the mating block 8 of the moving contact 2 impacts the stop block 7 and then squeezes the elastic element 9, thereby buffering the impact force of the moving contact 2 and extending the service life of the shaft 1.

[0035] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A circuit breaker shaft buffer and stress relief structure, characterized in that, include: A rotating shaft (1) is equipped with a moving contact (2). The moving contact (2) has a mounting section (3), a connecting section (4), and a contact section (5) connected in sequence. The mounting section (3) is assembled with the rotating shaft (1), and the contact section (5) is equipped with a moving contact (6). The stop block (7) is movably mounted on the rotating shaft (1) and is used to abut against the mating block (8) on the mounting section (3); An elastic element (9) is disposed between the stop block (7) and the rotating shaft (1), and the elastic element (9) is located on the side of the stop block (7) away from the mating block (8).

2. The circuit breaker shaft buffer stress relief structure according to claim 1, characterized in that, The rotating shaft (1) includes two mounting plates (10) arranged opposite to each other. The two mounting plates (10) are provided with corresponding elongated holes (11). The stop block (7) is installed between the two mounting plates (10) and has connecting shafts (12) at both ends that extend into the elongated holes (11). The connecting shafts (12) can move within the elongated holes (11).

3. The circuit breaker shaft buffer stress relief structure according to claim 1 or 2, characterized in that, The elastic element (9) is a spring.

4. The circuit breaker shaft buffer stress relief structure according to claim 3, characterized in that, The stop block (7) is formed with a first positioning groove (13) into which one end of the spring extends, and the rotating shaft (1) is formed with a second positioning groove (14) into which the other end of the spring extends.

5. The circuit breaker shaft buffer stress relief structure according to claim 1, characterized in that, It also includes a gas baffle (15), which has a first cover (16) assembled with the connecting section (4) of the moving contact (2), and a second cover (17) integrally connected to the first cover (16) and extending between the rotating shaft (1) and the circuit breaker base (18).

6. The circuit breaker shaft buffer stress relief structure according to claim 5, characterized in that, The first cover (16) is U-shaped, and the two vertical plates (19) of the U-shaped first cover (16) are assembled with the connecting section (4) by rivets (20).

7. The circuit breaker shaft buffer stress relief structure according to claim 6, characterized in that, The pivot (1) is formed with a movable groove (21) for the connecting section (4) to swing, and the second cover (17) has an air-blocking part (22) extending outward from the end connected to the vertical plate (19) for blocking the movable groove (21).

8. The circuit breaker shaft buffer stress relief structure according to claim 5, characterized in that, The second cover (17) has an arc-shaped structure.

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