Isolation microswitch trigger mechanism for vacuum circuit breaker

Abstract

The utility model relates to an isolation microswitch trigger mechanism for a vacuum circuit breaker. The trigger switches are arranged on a first side plate of the operating mechanism; the sliding piece is arranged between a first side plate and a second side plate of the operating mechanism, the sliding piece and the trigger end of the trigger switch are located on the same plane, and the sliding piece has the trend of moving towards the direction of the second side plate; the isolation shaft is arranged in parallel with a second side plate of the operating mechanism, the isolation shaft is provided with a cam in a linkage mode, and the cam can drive the sliding part to move towards the first side plate and trigger the trigger switch when the isolation shaft rotates. The isolation shaft which is directly parallel to the operation mechanism is utilized, the rotation of the isolation shaft is utilized to drive the sliding piece to trigger the trigger switch, then isolation signal output is achieved, meanwhile, the trigger switch, the sliding piece and the cam are arranged at the corresponding positions of the first side plate and the second side plate respectively, the spare position of the operation mechanism is greatly utilized, and the operation efficiency is improved. And miniaturization design can be carried out on the operating mechanism.

Description

Technical Field

[0001] The utility model belongs to the field of circuit breakers, and particularly relates to an isolation microswitch trigger mechanism for a vacuum circuit breaker. Background Art

[0002] A vacuum circuit breaker is a circuit breaker that uses vacuum as the insulation and arc extinguishing medium between the contacts. Because of its advantages of small volume and light weight, it is widely used in the distribution network. Many industrial and mining enterprises, power plants, and substations use vacuum circuit breakers for the protection and control of electrical equipment.

[0003] The vacuum circuit breaker has the function of isolating and switching. In order to output the signal for realizing this function, a trigger switch is generally arranged on the side plate of the operating mechanism, and a crank arm or a linkage mechanism linked with the isolation main shaft is used to trigger the trigger switch, so as to output an isolation signal. By adopting this method, the isolation shaft needs to be arranged through the side plate of the operating mechanism, and at the same time, the trigger switch and the crank arm or the linkage mechanism need to be on the same side of the operating mechanism, which will affect the miniaturized design of the whole operating mechanism. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an isolation microswitch trigger mechanism for a vacuum circuit breaker.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An isolation microswitch trigger mechanism for a vacuum circuit breaker, comprising:

[0007] A plurality of trigger switches arranged at the first side plate of the operating mechanism;

[0008] A sliding member arranged between the first side plate and the second side plate of the operating mechanism, and the sliding member and the trigger end of the trigger switch are in the same plane, and the sliding member has a tendency to move towards the second side plate;

[0009] An isolation shaft arranged parallel to the second side plate of the operating mechanism, a cam is linked to the isolation shaft, and when the isolation shaft rotates, the cam can drive the sliding member to move towards the first side plate and trigger the trigger switch.

[0010] The trigger switch is fixedly arranged on the first side plate through a mounting plate, and a through hole for the trigger end of the trigger switch to pass through is arranged on the first side plate.

[0011] A guide rail is arranged between the first side plate and the second side plate, and the sliding member can be slidably arranged on the guide rail.

[0012] The guide rail is a guide rod, and a guide hole adapted to the guide rod is arranged on the sliding member.

[0013] The sliding member is a plate-like structure, the front end of which is bent downward to form a mating wall that cooperates with the cam, and the rear end of which is bent downward to form a triggering wall that cooperates with the trigger switch.

[0014] Hook holding portions are provided on both sides of the sliding member, and an elastic member that enables the sliding member to move in the direction towards the second side plate is provided between the hook holding portions and the second side plate.

[0015] An opening through which the sliding member can pass is provided at the upper end of the second side plate.

[0016] Limit grooves are provided on both sides of the sliding member, and the side walls on both sides of the opening are placed in the limit grooves.

[0017] A limit screw for restricting the maximum movement distance of the sliding member is provided at the front end of the sliding member, and the limit screw passes through the mating wall and is fixedly connected to the second side plate.

[0018] The lower end of the mating wall extends downward to form a guiding wall, and the guiding wall is inclined towards the second side plate.

[0019] Advantages of the present utility model: In this application, an isolation shaft directly arranged in parallel with the operating mechanism is utilized, and its rotation drives the sliding member to trigger the trigger switch, thereby realizing the output of isolation signals. At the same time, the trigger switch, the sliding member, and the cam are respectively placed at corresponding positions on the first side plate and the second side plate, thereby greatly utilizing the vacant position of the operating mechanism and enabling miniaturization design of the operating mechanism. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the present utility model applied to a vacuum circuit breaker.

[0021] Figure 2 It is a schematic structural diagram of the present utility model.

[0022] Figure 3 It is a schematic cross-sectional diagram of the present utility model.

[0023] Figure 4 It is a schematic structural diagram of the sliding member of the present utility model. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] As shown in the figure, the utility model discloses an isolating micro switch trigger mechanism for a vacuum circuit breaker, and the trigger mechanism is used to output corresponding signals when the isolating shaft is opened or closed.

[0027] The utility model comprises a trigger switch, a sliding member and a cam for driving the sliding member to move, wherein the cam is linked with the isolation shaft, and the cam can be directly sleeved on the isolation shaft.

[0028] A plurality of trigger switches 1 are arranged on the first side plate 5 of the operating mechanism, which are fixed on the first side plate 5 by a mounting plate 11, and a through hole is provided on the first side plate 5 for the trigger end of the trigger switch 1 to pass through, so that the sliding member 2 can touch the trigger end of the trigger switch 1 when moving, wherein the trigger switch 1 can be a micro switch, a bridge switch, etc., and three of them are arranged side by side, and the three side-by-side trigger switches 1 are directly fixed to the outer side of the first side plate 5 by the mounting plates 11 on both sides.

[0029] The sliding member 2 is arranged between the first side plate 5 and the second side plate 6 of the operating mechanism, and the gap between the two is utilized, that is, the length of the sliding member 2 is designed to be a length that can be moved in the gap, and the sliding member and the trigger end of the trigger switch 1 are in the same plane, and the sliding member 2 has a tendency to move toward the second side plate 6, that is, when the sliding member 2 is not subjected to a force driving it to move in the direction of the first side plate 5, the sliding member 2 will move in the direction of the second side plate 6 under the action of the elastic member, thereby releasing the pressing action on the trigger switch 1.

[0030] An isolating shaft 3 is arranged parallel to the second side plate 6 of the operating mechanism. The isolating shaft passes through the circuit breaker frame and the isolating switch of the insulating cylinder, and the design that the isolating shaft passes through the side plate of the operating mechanism can greatly reduce the space occupied by the operating mechanism and further reduce the size of the operating mechanism. The isolating shaft 3 is linked with a cam 4. When the isolating shaft 3 rotates, the cam 4 can drive the sliding member 2 to move toward the first side plate 5 and trigger the trigger switch 1. The rotation of the isolating shaft synchronously drives the cam to rotate, so that it presses one end of the sliding member and moves it toward the first side plate. After the isolating shaft completes the action, the sliding plate just presses the trigger switch, thereby realizing the output of the isolation and separation signal.

[0031] A guide rail 12 is provided between the first side plate 5 and the second side plate 6. The sliding member 2 is slidably arranged on the guide rail 12. By providing the guide rail 12, the moving direction of the sliding member can be restricted, so that it can always trigger the trigger switch 1.

[0032] The guide rail can be a linear guide rail, and the guide rail 12 can also be a guide rod. The sliding member 2 is provided with a guide hole 211 adapted to the guide rod. The guide rod is used to restrict the moving direction of the whole sliding member, and at the same time, it can also play a certain supporting role.

[0033] The sliding member 2 is a plate-like structure. Its front end is bent downward to form a mating wall 22 that cooperates with the cam 4, and its rear end is bent downward to form a trigger wall 21 that cooperates with the trigger switch 1. Corresponding guide holes are provided on the mating wall and the trigger wall. At the same time, the surface of the trigger wall 21 that cooperates with the trigger switch is a plane, which can better trigger multiple trigger switches.

[0034] Hook holding parts 23 are provided on both sides of the sliding member 2. An elastic member that enables the sliding member 2 to move in the direction towards the second side plate 6 is provided between the hook holding parts 23 and the second side plate 6. The elastic member is a tension spring, which is respectively hooked between the hook holding parts 23 and the second side plate 6. The elastic member is not shown in the figure.

[0035] An opening 13 through which the sliding member 2 can pass is provided at the upper end of the second side plate 6. The design of the opening facilitates the placement of a part of the sliding member outside the second side plate, making the installation more convenient. At the same time, limiting grooves 24 are provided on both sides of the sliding member 2, and the side walls on both sides of the opening are placed in the limiting grooves 24. The length of the limiting grooves is adapted to the moving distance of the sliding member, so as to realize the limitation of the maximum moving positions in two directions.

[0036] A limit screw 7 for restricting its maximum moving distance is provided at the front end of the sliding member 2. The limit screw 7 passes through the mating wall 22 and is fixedly connected to the second side plate 6. The design of the limit screw 7 can also play a role in positioning the sliding member, ensuring that its position will not shift and affect the triggering of the trigger switch.

[0037] The lower end of the mating wall 22 extends downward to form a guide wall 221, and the guide wall 221 is inclined towards the second side plate 6. The design of the guide wall makes the contact between the mating wall and the cam a line contact. When the isolation shaft rotates, the connection part between the guide wall and the mating wall moves along the outer contour of the cam, so as to drive its movement by the cam. At the same time, the inclined design can avoid interference with the cam.

[0038] The embodiments should not be regarded as limitations on the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An isolating micro switch trigger mechanism for a vacuum circuit breaker, characterized in that: It includes: A plurality of trigger switches (1) arranged on a first side plate (5) of the operating mechanism; A sliding member (2) is arranged between a first side plate (5) and a second side plate (6) of the operating mechanism, wherein the sliding member and a trigger end of the trigger switch (1) are located in the same plane, and the sliding member (2) has a tendency to move toward the second side plate (6); An isolation shaft (3) is arranged parallel to the second side plate (6) of the operating mechanism, and the isolation shaft (3) is linked with a cam (4). When the isolation shaft (3) rotates, the cam (4) can drive the sliding member (2) to move in the direction of the first side plate (5) and trigger the trigger switch (1).

2. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The trigger switch (1) is fixedly mounted on the first side plate (5) via a mounting plate (11), and the first side plate (5) is provided with a through hole through which a trigger end of the trigger switch (1) can pass.

3. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 1, characterized in that: A guide rail (12) is provided between the first side plate (5) and the second side plate (6), and the sliding member (2) is slidably arranged on the guide rail (12).

4. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 3, characterized in that: The guide rail (12) is a guide rod, and the sliding member (2) is provided with a guide hole (211) adapted to the guide rod.

5. The isolating micro switch triggering mechanism for a vacuum circuit breaker according to claim 1, 2, 3 or 4, characterized in that: The sliding member (2) is a plate-shaped structure, the front end of which is bent downward to form a matching wall (22) matching with the cam (4), and the rear end of which is bent downward to form a trigger wall (21) matching with the trigger switch (1).

6. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 5, characterized in that: Hooking portions (23) are provided on both sides of the sliding member (2), and an elastic member is provided between the hooking portions (23) and the second side plate (6) to enable the sliding member (2) to move in a direction towards the second side plate (6).

7. The isolating micro switch triggering mechanism for a vacuum circuit breaker according to claim 5, characterized in that: An opening (13) is provided at the upper end of the second side plate (6) for the sliding member (2) to pass through.

8. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 7, characterized in that: Limiting grooves (24) are provided on both sides of the sliding member (2), and the side walls on both sides of the opening are placed in the limiting grooves (24).

9. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 5, characterized in that: A limit screw (7) is provided at the front end of the sliding member (2) for limiting its maximum moving distance, and the limit screw (7) passes through the matching wall (22) and is fixedly connected to the second side plate (6).

10. The isolating micro switch trigger mechanism for a vacuum circuit breaker according to claim 5, characterized in that: The lower end of the matching wall (22) extends downward to form a guide wall (221), and the guide wall (221) is arranged to be inclined in the direction of the second side plate (6).

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