A permanent magnet operating mechanism for vacuum circuit breaker

Abstract

The utility model provides a kind of permanent-magnetic operating mechanism for vacuum circuit breaker, including left side plate, right side plate and connecting plate, the connecting plate is equipped with two, it is respectively arranged between the upper and lower ends of left side plate and right side plate, is fixedly connected by bolt and left side plate and right side plate, the right side plate front is equipped with static contact and moving contact, transmission device is further equipped between the left side plate and right side plate, the rotation of moving contact is controlled by transmission device, for the closure and disconnection between moving contact and static contact, the front of left side plate is further equipped with buffer device, buffer device is set by being arranged in the side of energy storage spring, the setting of buffer device can effectively reduce the impact in the action process of operating mechanism, reduce the damage to mechanism itself, improve the reliability and stability of mechanism.

Description

Technical Field

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

[0002] Vacuum circuit breakers are named for their high vacuum conditions, which are the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They have the advantages of small size, light weight, suitability for frequent operation, and no need for maintenance during arc extinguishing. They are widely used in power distribution networks. The permanent magnet operating mechanism is one of the key components of a vacuum circuit breaker, and its performance directly affects the reliability and stability of the vacuum circuit breaker.

[0003] The existing permanent magnet operating mechanism for vacuum circuit breakers has low transmission efficiency during the transmission process, and lacks an effective buffer device during the operation of the operating mechanism, which will cause a large impact on the mechanism itself, reducing the reliability and service life of the mechanism.

[0004] To address these issues, a permanent magnet operating mechanism for vacuum circuit breakers is proposed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problem of lack of effective buffer device during the operation of the operating mechanism, this utility model provides a permanent magnet operating mechanism for vacuum circuit breakers.

[0006] This utility model is achieved using the following technical solution:

[0007] A permanent magnet operating mechanism for a vacuum circuit breaker includes a left side plate, a right side plate, and a connecting plate. Two connecting plates are provided, respectively disposed between the upper and lower ends of the left side plate and the right side plate, and are fixedly connected to the left side plate and the right side plate by bolts. The right side plate has a stationary contact and a moving contact on its front side. A transmission device is also provided between the left side plate and the right side plate. The transmission device controls the rotation of the moving contact for closing and opening the moving contact and the stationary contact.

[0008] The front of the left side panel is also provided with a buffer device.

[0009] The transmission device includes a first gear, a second gear, a third gear, a rotating column, and an energy storage spring. The first gear is disposed between the left side plate and the right side plate. The second gear is located below the first gear and meshes with it. The third gear is located below the second gear and meshes with it. The rotating column is located below the third gear. The first gear, the second gear, and the third gear are respectively provided with a first rotating shaft, a second rotating shaft, and a third rotating shaft on both sides.

[0010] The right side plate is provided with a handle, which is connected to the end of the first rotating shaft. The left side plate is provided with a crank arm, which is connected to the end of the second rotating shaft. The crank arm is also provided with a hanging plate, which can rotate on the crank arm. One end of the energy storage spring is connected to the hanging plate, and the other end is connected to the end of the rotating column.

[0011] The buffer device includes a mounting block, a buffer cavity inside the mounting block, a buffer spring inside the buffer cavity, a buffer post on the top of the buffer spring, one end of the buffer spring being fixed to the bottom wall of the buffer cavity, and the other end being fixedly connected to the bottom of the buffer post. A cover plate is also provided at the top of the buffer cavity, and the cover plate is fixedly connected to the mounting block. The buffer post extends above the cover plate.

[0012] The moving contact is provided with a slot, the shape of which is adapted to the shape of the stationary contact.

[0013] The front of the left side plate is provided with a spring limiting post, and the front of the right side plate is provided with a contact limiting post.

[0014] The present invention has the following advantages over the prior art:

[0015] 1. By setting a buffer device on the side of the energy storage spring, the buffer device can effectively reduce the impact during the operation of the operating mechanism, reduce the damage to the mechanism itself, and improve the reliability and stability of the mechanism.

[0016] 2. By setting up a transmission device, which uses the meshing of multiple gears to drive the circuit, the transmission efficiency is improved, the movement of the moving contact is made smoother, the stability of the closing and opening of the moving contact and the stationary contact is enhanced, the generation of electric arc is reduced, and the service life of the vacuum circuit breaker is increased. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the left side of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the right side view of this utility model;

[0019] Figure 3 This is an exploded three-dimensional structural diagram of the buffer device of this utility model;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the transmission device of this utility model;

[0021] In the diagram: 1. Left side plate; 11. Spring limiting post; 2. Right side plate; 21. Stationary contact; 22. Contact limiting post; 3. Connecting plate; 4. Energy storage spring; 41. Hanging plate; 5. Buffer device; 51. Mounting block; 52. Buffer cavity; 53. Buffer spring; 54. Cover plate; 55. Buffer post; 6. Moving contact; 61. Slot; 7. First gear; 71. Rotating handle; 8. Second gear; 81. Crank arm; 9. Third gear; 10. Rotating post. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 4 As shown, a permanent magnet operating mechanism for a vacuum circuit breaker includes a left side plate 1, a right side plate 2, and a connecting plate 3. Two connecting plates 3 are provided, respectively disposed between the upper and lower ends of the left side plate 1 and the right side plate 2, and are fixedly connected to the left side plate 1 and the right side plate 2 by bolts. The left side plate 1, the right side plate 2, and the connecting plate 3 form a stable frame structure. The right side plate 2 has a stationary contact 21 and a moving contact 6 on its front side. A transmission device is also provided between the left side plate 1 and the right side plate 2. The transmission device controls the rotation of the moving contact 6 for closing and opening between the moving contact 6 and the stationary contact 21.

[0025] The front of the left side plate 1 is also provided with a buffer device 5.

[0026] The transmission device includes a first gear 7, a second gear 8, a third gear 9, a rotating column 10, and an energy storage spring 4. The first gear 7 is disposed between the left side plate 1 and the right side plate 2. The second gear 8 is located below the first gear 7 and meshes with it. The third gear 9 is located below the second gear 8 and meshes with it. The rotating column 10 is located below the third gear 9. The first gear 7, the second gear 8, and the third gear 9 are respectively provided with a first rotating shaft, a second rotating shaft, and a third rotating shaft on both sides.

[0027] The right side plate 2 is provided with a handle 71, which is connected to the end of the first rotating shaft. The left side plate 1 is provided with a crank arm 81, which is connected to the end of the second rotating shaft. The crank arm 81 is also provided with a hanging plate 41, which can rotate on the crank arm 81. One end of the energy storage spring 4 is connected to the hanging plate 41, and the other end is connected to the end of the rotating column 10. When the handle 71 is rotated, the crank arm 81 is driven to move through the gear transmission, which in turn causes the energy storage spring 4 to deform and store energy. While the spring stores energy, it also drives the rotating column 10 to rotate. When the handle 71 is rotated in the opposite direction, the energy storage spring 4 releases energy, which drives the rotating column 10 to move, thereby realizing the rotation of the moving contact 6 and controlling the closing and opening of the moving contact 6 and the stationary contact 21.

[0028] The buffer device 5 includes a mounting block 51, inside which is a buffer cavity 52. ​​A buffer spring 53 is provided inside the buffer cavity 52, and a buffer post 55 is provided on the top of the buffer spring 53. One end of the buffer spring 53 is fixed to the bottom wall of the buffer cavity 52, and the other end is fixedly connected to the bottom of the buffer post 55. A cover plate 54 is also provided at the top of the buffer cavity 52, and the cover plate 54 is fixedly connected to the mounting block 51. The buffer post 55 extends above the cover plate 54. When the operating mechanism is activated, the buffer post 55 will be subjected to impact force, compressing the buffer spring 53, thereby playing a buffering role and reducing the impact on the mechanism.

[0029] The moving contact 6 is provided with a groove 61, the shape of which is adapted to the shape of the stationary contact 21. This allows for a tighter contact when the moving contact 6 and the stationary contact 21 are closed, improving contact stability and reducing the generation of electric arc.

[0030] The front of the left side plate 1 is provided with a spring limiting post 11, which is used to limit the movement range of the energy storage spring 4 and prevent the energy storage spring 4 from being excessively deformed during movement. The front of the right side plate 2 is provided with a contact limiting post 22, which is used to limit the movement range of the moving contact 6 and ensure that the moving contact 6 returns to its correct position.

[0031] The working principle of this utility model is as follows: When it is necessary to control the closing of the moving contact 6 and the stationary contact 21, rotate the handle 71. The handle 71 drives the first gear 7 to rotate. The first gear 7 drives the second gear 8 to rotate through meshing. The second gear 8 then drives the third gear 9 to rotate through meshing.

[0032] The rotation of the second gear 8 drives the crank arm 81 to move, and the hanging plate 41 on the crank arm 81 also moves accordingly, causing the energy storage spring 4 to deform and store energy, which drives the rotating column 10 to move. The movement of the rotating column 10 causes the moving contact 6 to rotate and close with the stationary contact 21.

[0033] When it is necessary to control the moving contact 6 to disconnect from the stationary contact 21, rotate the handle 71 in the opposite direction again. Through the action of the transmission device, the energy storage spring 4 stores energy and then releases the energy to drive the rotating column 10 to move in the opposite direction, causing the moving contact 6 to rotate and disconnect from the stationary contact 21.

[0034] During the operation of the operating mechanism, the buffer column 55 of the buffer device 5 will be subjected to impact force, compressing the buffer spring 53 to play a buffering role and reduce the impact on the mechanism. The spring limit column 11 limits the range of motion of the energy storage spring 4 to prevent the energy storage spring 4 from being excessively deformed.

[0035] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A permanent magnet operating mechanism for a vacuum circuit breaker, comprising a left side plate (1), a right side plate (2), and a connecting plate (3), wherein two connecting plates (3) are respectively disposed between the upper and lower ends of the left side plate (1) and the right side plate (2), and are fixedly connected to the left side plate (1) and the right side plate (2) by bolts, characterized in that, The right side plate (2) is provided with a stationary contact (21) and a moving contact (6) on the front side. A transmission device is also provided between the left side plate (1) and the right side plate (2). The transmission device controls the rotation of the moving contact (6) and is used for closing and opening between the moving contact (6) and the stationary contact (21). The front of the left side plate (1) is also provided with a buffer device (5).

2. The permanent magnet operating mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The transmission device includes a first gear (7), a second gear (8), a third gear (9), a rotating column (10), and an energy storage spring (4). The first gear (7) is disposed between the left side plate (1) and the right side plate (2). The second gear (8) is located below the first gear (7) and meshes with it. The third gear (9) is located below the second gear (8) and meshes with it. The rotating column (10) is located below the third gear (9). The first gear (7), the second gear (8), and the third gear (9) are respectively provided with a first rotating shaft, a second rotating shaft, and a third rotating shaft on both sides. The right side plate (2) is provided with a handle (71), which is connected to the end of the first rotating shaft. The left side plate (1) is provided with a crank arm (81), which is connected to the end of the second rotating shaft. The crank arm (81) is also provided with a hanging plate (41), which can rotate on the crank arm (81). One end of the energy storage spring (4) is connected to the hanging plate (41), and the other end is connected to the end of the rotating column (10).

3. The permanent magnet operating mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The buffer device (5) includes a mounting block (51), a buffer cavity (52) is provided inside the mounting block (51), a buffer spring (53) is provided inside the buffer cavity (52), a buffer post (55) is provided on the top of the buffer spring (53), one end of the buffer spring (53) is fixed to the bottom wall of the buffer cavity (52), and the other end is fixedly connected to the bottom of the buffer post (55). A cover plate (54) is also provided on the top of the buffer cavity (52), the cover plate (54) is fixedly connected to the mounting block (51), and the buffer post (55) extends out of the cover plate (54).

4. The permanent magnet operating mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The moving contact (6) is provided with a slot (61), the shape of which is adapted to the shape of the stationary contact (21).

5. A permanent magnet operating mechanism for a vacuum circuit breaker according to claim 2, characterized in that: The front of the left side plate (1) is provided with a spring limiting post (11), and the front of the right side plate (2) is provided with a contact limiting post (22).

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