Novel transmission structure of circuit breaker operating mechanism

Abstract

The utility model relates to the technical field of circuit breaker transmission, in particular to a transmission structure of a novel circuit breaker operating mechanism, which comprises an energy storage motor, a driving gear sleeved at the output end of the energy storage motor, a transmission gear meshed at the lower end of the driving gear, a bull gear meshed at one side of the transmission gear far away from the driving gear, and a bearing mounted on the inner wall of the bull gear. According to the utility model, the energy storage motor is started, so that the driving gear drives the transmission gear below the driving gear to rotate clockwise through meshing connection, the switching-on work is large, and the transmission efficiency is improved; and meanwhile, the cam rotates to push the first output connecting lever to rotate clockwise, and the first output connecting lever drives the transmission spline shaft to rotate clockwise while rotating clockwise, so that the transmission spline shaft is buffered when rotating under the thrust of the opening spring.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker transmission, in particular to a transmission structure of an operating mechanism of a new sulfur hexafluoride circuit breaker. Background Art

[0002] As an important switching device in a high-voltage power system, due to the excellent characteristics of this gas, the single break of this circuit breaker is much higher than that of a compressed air circuit breaker and a less oil circuit breaker in terms of voltage and current parameters. The design of the transmission structure of its operating mechanism has an important impact on the performance, reliability and service life of the circuit breaker.

[0003] During the operation of the sulfur hexafluoride circuit breaker, the electrical control part receives control signals from the outside, drives the mechanical transmission part through components such as electromagnets, and the mechanical transmission part uses mechanical principles such as the lever principle, spring energy storage and release to convert the control signals into the actual actions of the circuit breaker.

[0004] However, in the existing transmission devices of the operating mechanisms of sulfur hexafluoride circuit breakers, it is often only through the motor to drive the chain to compress the energy storage spring, and the energy released by the energy storage spring is used to separate the moving contact and the static contact by mechanisms such as the toggle arm and the push rod, so as to realize the disconnection of the circuit. This will lead to unstable device structure and low transmission performance. When the closing work required by the capacitor circuit breaker is large, the device cannot perform heavy-duty transmission well, and there is no good buffer for the energy released by the energy storage spring, which is easy to cause mechanical fatigue and reduce the durability of the device. Summary of the Utility Model

[0005] In view of the problems of small closing work, unreliable performance, low transmission efficiency and inability to perform heavy-duty transmission well, and at the same time, there is no good buffer for the energy released by the energy storage spring, a transmission structure of a new circuit breaker operating mechanism is proposed.

[0006] The technical solution of the utility model is: a transmission structure of a new circuit breaker operating mechanism, including an energy storage motor, a driving gear is sleeved on the output end of the energy storage motor, a transmission gear is meshed with the lower end of the driving gear, a large gear is meshed with the side of the transmission gear away from the driving gear, a bearing is installed on the inner wall of the large gear, a rotating shaft is installed on the inner wall of the bearing, a ratchet wheel is sleeved on the side of the rotating shaft close to the large gear, a pawl in contact with the ratchet wheel is rotatably connected to one side of the large gear, and a cam is installed on the rotating shaft;

[0007] Both ends of the rotating shaft are fixedly installed with toggle arms, an energy storage spring is rotatably connected to the side of the toggle arm away from the rotating shaft, a spring connector is installed at the end of the energy storage spring away from the toggle arm, and a connecting rod is rotatably connected to the spring connector.

[0008] Preferably, a torsion spring is installed on the side of the large gear close to the ratchet wheel, and a card slot for inserting the torsion spring is provided on the pawl.

[0009] Preferably, the crank arm is L-shaped, and a bearing is provided at the connection between the crank arm and the energy storage spring.

[0010] Preferably, a transmission spline shaft is arranged on one side of the large gear, and a first output crank arm that can abut against the cam is installed on the transmission spline shaft.

[0011] Preferably, second output crank arms are installed at both ends of the transmission spline shaft, and a closing spring is rotatably connected to one side of the second output crank arm.

[0012] Preferably, buffer arms distributed on both sides of the first output crank arm are installed on the transmission spline shaft, and an oil buffer is rotatably connected to the end of the buffer arm far from the transmission spline shaft.

[0013] Advantages of the utility model:

[0014] 1. By starting the energy storage motor, the driving gear drives the transmission gear below it to rotate clockwise through meshing connection. While the transmission gear rotates, it drives the large gear to rotate counterclockwise. When the large gear rotates, the pawl installed on one side of the large gear will push the ratchet wheel to rotate counterclockwise. After that, when the ratchet wheel rotates counterclockwise, the rotating shaft fixedly installed inside it will drive the crank arm to rotate counterclockwise. When the crank arm rotates, the energy storage spring installed on one side of it will be pulled and start to store energy. When the crank arm rotates half a circle from the highest point and then continues to rotate, the energy storage spring will start to contract and release energy, thereby driving the rotating shaft to rotate counterclockwise. The rotating shaft rotates counterclockwise to drive the cam installed on it to rotate counterclockwise. This mechanism has a large closing work, improves the transmission efficiency, and the output of the energy storage spring is more stable.

[0015] 2. The cam rotates to push the first output crank arm to rotate clockwise. While the first output crank arm rotates clockwise, it drives the transmission spline shaft to rotate clockwise. The transmission spline shaft rotates clockwise to drive the second output crank arm to rotate. The rotation of the second output crank arm will push the closing spring to one side, causing the spring inside it to contract, restricting the rotation distance of the transmission spline shaft and assisting in buffering. At the same time, the buffer arm will lift the output end of the oil buffer upward through the rotating shaft. When the cam and the first output crank arm are disengaged from each other, due to the spring restoring force of the closing spring, the transmission spline shaft will drive the first output crank arm to rotate counterclockwise. At this time, when the transmission spline shaft rotates counterclockwise, it will cause the oil buffer rotatably connected to it to retract through the buffer arm, so that the transmission spline shaft obtains buffering when rotating back under the thrust of the closing spring. Description of the drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative labor, other attached drawings can also be obtained based on these drawings. Among them:

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 It is a schematic diagram of the bottom structure of the present utility model.

[0019] Figure 3 is Figure 1 a schematic diagram of the structure at position A in

[0020] Figure 4 It is a schematic sectional view structure of the present utility model;

[0021] Explanation of reference numerals:

[0022] In the figure: 1, energy storage motor; 2, driving gear; 3, transmission gear; 4, large gear; 5, rotating shaft; 6, ratchet; 7, ratchet pawl; 8, torsion spring; 9, card slot; 10, crank arm; 11, energy storage spring; 12, spring connector; 13, connecting rod; 14, cam; 15, transmission spline shaft; 16, first output crank arm; 17, second output crank arm; 18, opening spring; 19, buffer arm; 20, oil buffer. Specific embodiments

[0023] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will give a detailed description of the specific embodiments of the present utility model in conjunction with the attached drawings of the specification.

[0024] Embodiment 1

[0025] Refer to Figures 1-3, which is the first embodiment of the utility model, provides a transmission structure of a new circuit breaker operating mechanism, including an energy storage motor 1, the output end of the energy storage motor 1 is sleeved with a driving gear 2, the energy storage motor 1 can be driven by the internal battery to rotate the motor to drive the fixedly connected driving gear 2 to rotate, the lower end of the driving gear 2 is meshed with a transmission gear 3, the end of the transmission gear 3 away from the driving gear 2 is provided with a bearing, which is convenient for subsequent installation on other mechanisms, the side of the transmission gear 3 away from the driving gear 2 is meshed with a large gear 4, the large gear 4 is much larger than the transmission gear 3, when the transmission gear 3 rotates, the large gear 4 rotates accordingly, which makes the structure have large transmission force, transmission accuracy and flatness. The stability is high. A bearing is installed on the inner wall of the large gear 4. A rotating shaft 5 is installed on the inner wall of the bearing. When the large gear 4 is driven to rotate, the rotating shaft 5 will not rotate due to the bearing. A ratchet 6 is installed on the side of the rotating shaft 5 close to the large gear 4. The ratchet 6 does not contact the rotating shaft 5. The ratchet 6 is protruded with an arc edge on one side, and the ratchet 6 and the rotating shaft 5 are plugged together through the spline on the surface of the ratchet 6. A pawl 7 that contacts the ratchet 6 is rotatably connected to one side of the large gear 4. A groove is provided on the side of the pawl 7 close to the ratchet 6, which can contact the arc edge convex block of the ratchet 6 in one direction. A cam 14 is installed on the rotating shaft 5, and a convex block on the cam 14 can be used to push the first output crank arm 16 to move.

[0026] Crank arms 10 are fixedly installed at both ends of the rotating shaft 5. The side of the crank arm 10 away from the rotating shaft 5 is rotatably connected to an energy storage spring 11. A spring connector 12 is installed at the end of the energy storage spring 11 away from the crank arm 10. A connecting rod 13 is rotatably connected to the spring connector 12. The connecting rod 13 is fixed on a mechanism that requires the device. When the crank arm 10 rotates, the energy storage spring 11 will move accordingly, and when rotating, the energy storage spring 11 and the crank arm 10 will not come into contact at other positions except the connection.

[0027] A torsion spring 8 is installed on the side of the large gear 4 close to the ratchet 6. The torsion spring 8 is sleeved on the fixing nut. A slot 9 is provided on the pawl 7 for plugging with the torsion spring 8. The torsion spring 8 can move in the slot 9. At the same time, under normal conditions, the torsion spring 8 pulls the pawl 7 to fit with the ratchet 6 through the slot 9, so that the groove of the pawl 7 contacts the arc edge protrusion of the ratchet 6. A bearing is provided at the connection between the crank arm 10 and the energy storage spring 11, so that the energy storage spring 11 is smoother and more stable while rotating.

[0028] When in use, by starting the energy storage motor 1, the driving gear 2 installed at the output end of the energy storage motor 1 starts to rotate counterclockwise, and the driving gear 2 drives the transmission gear 3 below it to rotate clockwise through the meshing connection. The transmission gear 3 rotates and drives the large gear 4 to rotate counterclockwise. When the large gear 4 rotates, the ratchet pawl 7 installed on one side of the large gear 4 will contact the arc edge protrusion of the ratchet 6 through the groove on one side of the ratchet 6, thereby pushing the ratchet 6 to rotate counterclockwise. At the same time, the ratchet pawl 7 is pulled by the elastic restoring force of the torsion spring 8, so that the ratchet pawl 7 is not easy to disengage from the interference with the ratchet 6, and then when the ratchet 6 rotates counterclockwise, the rotating shaft 5 fixedly installed inside it will drive the crank arm 10 to rotate counterclockwise, and when the crank arm 10 rotates, the energy storage spring 11 installed on one side will be pulled and start to store force, and when the crank arm 10 rotates half a circle from the highest point and then continues to rotate, the energy storage spring 11 will begin to contract and release energy, thereby driving the rotating shaft 5 to rotate counterclockwise, and the counterclockwise rotation of the rotating shaft 5 drives the cam 14 installed thereon to rotate counterclockwise.

[0029] Example 2

[0030] Reference Figures 1-4 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that a transmission spline shaft 15 is provided on one side of the large gear 4, and a first output crank arm 16 that can contact with the cam 14 is installed on the transmission spline shaft 15. The transmission spline shaft 15 is meshedly connected with the first output crank arm 16. When the first output crank arm 16 rotates, the transmission spline shaft 15 will also rotate accordingly.

[0031] A second output crank arm 17 is installed at both ends of the transmission spline shaft 15. The second output crank arm 17 is L-shaped. One side of the lower end of the second output crank arm 17 is rotatably connected to a trip spring 18. A movable rod is provided in the trip spring 18. When the second output crank arm 17 rotates clockwise, the second output crank arm 17 will cause the movable rod to contract through the rotating shaft, thereby compressing the trip spring 18.

[0032] The transmission spline shaft 15 is provided with buffer arms 19 distributed on both sides of the first output crank arm 16. The buffer arm 19 is rotatably connected to one end away from the transmission spline shaft 15 with an oil buffer 20. The buffer arm 19 rotates with the transmission spline shaft 15. When the buffer arm 19 rotates counterclockwise too fast, the oil buffer 20 is connected through the rotating shaft so that the buffer arm 19 and the transmission spline shaft 15 connected thereto are buffered.

[0033] In use, when the cam 14 is pushed by the energy storage spring 11 to rotate counterclockwise, it will contact the first output crank arm 16 and push it to rotate clockwise. While the first output crank arm 16 rotates clockwise, it drives the transmission spline shaft 15 to rotate clockwise. The clockwise rotation of the transmission spline shaft 15 drives the second output crank arm 17 to rotate. The rotation of the second output crank arm 17 will push the closing spring 18 to one side, causing the spring inside it to contract, restricting the rotation distance and providing auxiliary buffering for the rotation of the transmission spline shaft 15. At the same time, the buffer arm 19 will lift the output end of the oil buffer 20 upward through the rotating shaft. When the cam 14 and the first output crank arm 16 are disengaged from each other, due to the spring restoring force of the closing spring 18, the transmission spline shaft 15 will drive the first output crank arm 16 to rotate counterclockwise. At this time, when the transmission spline shaft 15 rotates counterclockwise, it will cause the oil buffer 20 rotationally connected to it to retract through the buffer arm 19, enabling the transmission spline shaft 15 to obtain buffering when rotating back under the thrust of the closing spring 18.

[0034] The remaining structure is the same as that of Embodiment 1.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Transmission structure of a new circuit breaker operating mechanism, including a storage motor (1), a driving gear (2) is sleeved on the output end of the storage motor (1), a transmission gear (3) is engaged with the lower end of the driving gear (2), and a large gear (4) is engaged with one side of the transmission gear (3) away from the driving gear (2), characterized in that: A bearing is installed on the inner wall of the large gear (4), a rotating shaft (5) is installed on the inner wall of the bearing, a ratchet (6) is sleeved on the side of the rotating shaft (5) close to the large gear (4), a ratchet pawl (7) that contacts the ratchet (6) is rotatably connected to one side of the large gear (4), and a cam (14) is installed on the rotating shaft (5); Crank arms (10) are fixedly mounted on both ends of the rotating shaft (5); a side of the crank arm (10) away from the rotating shaft (5) is rotatably connected to an energy storage spring (11); a spring connector (12) is mounted on the end of the energy storage spring (11) away from the crank arm (10); and a connecting rod (13) is rotatably connected to the spring connector (12).

2. The transmission structure of the novel circuit breaker operating mechanism according to claim 1, wherein: A torsion spring (8) is installed on the side of the large gear (4) close to the ratchet (6), and a slot (9) for plugging into the torsion spring (8) is provided on the ratchet pawl (7).

3. The transmission structure of the novel circuit breaker operating mechanism according to claim 1, characterized in that: The crank arm (10) is L-shaped, and a bearing is provided at the connection between the crank arm (10) and the energy storage spring (11).

4. The transmission structure of the novel circuit breaker operating mechanism according to claim 2, characterized in that: A transmission spline shaft (15) is provided on one side of the large gear (4), and a first output crank arm (16) capable of abutting against the cam (14) is mounted on the transmission spline shaft (15).

5. The drive structure of the novel circuit breaker operating mechanism according to claim 4, characterized in that: Second output crank arms (17) are mounted on both ends of the transmission spline shaft (15); one side of the second output crank arm (17) is rotatably connected to a brake opening spring (18).

6. The transmission structure of the novel circuit breaker operating mechanism according to claim 4, characterized in that: The transmission spline shaft (15) is provided with buffer arms (19) distributed on both sides of the first output crank arm (16), and one end of the buffer arm (19) away from the transmission spline shaft (15) is rotatably connected to an oil buffer (20).

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