Single-pole handle linkage multistage mechanism and residual-current circuit breaker

Abstract

The utility model provides a monopole handle linkage multistage mechanism and electric leakage circuit breaker relates to circuit breaker technical field, monopole handle linkage multistage mechanism includes lever no. 1, lever no. 2, lock catch no. 1, lock catch no. 2 and reset elastic member, lock catch no. 2 is installed on lever no. 2, reset elastic member is connected with lever no. 2, lock catch no. 2 and lever no. When the release device acts, the second lock catch can be pushed to be unlocked, the second lever can toggle the first lock catch under the action of the reset elastic piece, the first lock catch is unlocked, and at the moment, the first lever acts to open the operating mechanism. By arranging the second lock catch, the reset elastic piece and the second lever to form a force amplification mechanism, the release device can rapidly trigger the operation mechanism and cut off a circuit through cooperation of the action of the second lock catch and the reset elastic piece with small force, coil burnout of the release device is avoided, and the service life of a product is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage circuit breakers, in particular to a single-pole handle linked multi-stage mechanism and a leakage circuit breaker. Background Art

[0002] When a traditional single-handle two-pole leakage circuit breaker is at a certain voltage, such as 50V, it is difficult to trigger the main operating mechanism of the circuit breaker when the power of the release device is small because the main mechanism requires a large force to operate. The operating mechanism is difficult to disconnect the circuit in time, resulting in the coil of the release being burned. In view of the above defects, this application is proposed. Utility Model Content

[0003] The utility model aims to provide a single-pole handle linked multi-stage mechanism and a leakage circuit breaker, which solves the problem of difficult triggering of the operating mechanism, and only requires a small force to trigger the main operating mechanism, thereby avoiding the problem of the coil of the release being burned due to the operating mechanism not acting in time.

[0004] In order to solve the above problems, the utility model provides a single-pole handle linked multi-stage mechanism, including lever one, lever two, lock buckle one, lock buckle two and a reset elastic member, the lock buckle two is installed on lever two, the reset elastic member is connected to lever two, the lock buckle two and lever two constitute an amplification mechanism, and when the release device is actuated, the lock buckle two can be pushed to unlock, and the lever two can move the lock buckle one under the action of the reset elastic member to unlock the lock buckle one, and at this time, the lever one is actuated to realize the opening of the operating mechanism contacts and the handle to cut off the circuit.

[0005] According to an embodiment of the utility model, a force-bearing protrusion is provided on the lock buckle 1, and a toggle portion is provided on the lever 2.

[0006] According to an embodiment of the utility model, the force-bearing protrusion is cylindrical, and the shifting portion is provided with a curved surface for contacting the force-bearing protrusion.

[0007] According to an embodiment of the utility model, an empty slot is provided on the lock buckle 2 to reduce the weight of the lock buckle 2.

[0008] According to an embodiment of the utility model, the handle mechanism is connected to the first jump buckle and the second jump buckle through a push rod, and the first jump buckle and the second jump buckle are respectively installed on the first lever and the second lever.

[0009] According to an embodiment of the utility model, a limiting portion is provided on the lock buckle 2, and the limiting portion is used to move the lock buckle 2 to a position where it can engage with the jump buckle 2 again after the release device pushes the lock buckle 2 to move.

[0010] According to an embodiment of the present utility model, the contact end surface of the lock second and the moving iron core of the release device is a plane larger than the cross-sectional area of ​​the moving iron core.

[0011] According to an embodiment of the present invention, the resetting elastic member is a spring.

[0012] A leakage circuit breaker is provided with the above-mentioned multi-pole handle linkage mechanism.

[0013] According to an embodiment of the utility model, a rib cooperating with the limiting portion is arranged on the housing of the leakage circuit breaker.

[0014] The beneficial effect of the utility model is that, by setting the lock buckle 2, the reset elastic member and the lever 2, a force amplification mechanism is formed, so that the release device only needs a small force to quickly trigger the operating mechanism through the action of the lock buckle 2 and the reset elastic member to cut off the circuit, thereby avoiding the coil of the release device from burning and ensuring the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the leakage circuit breaker;

[0017] Figure 2 It is a structural diagram of one side of the lock buckle 2 of the multi-pole handle linkage mechanism;

[0018] Figure 3 It is a schematic diagram of the structure of one side of the lever of the multi-pole handle linkage mechanism;

[0019] Figure 4 It is a schematic diagram of the multi-pole handle linkage mechanism from another perspective;

[0020] Figure 5 It is a structural schematic diagram of the lever 1 and the lock 1 position;

[0021] Figure 6 It is a schematic diagram of the matching position of the lever 2 and the lock 1;

[0022] Figure 7 It is an exploded schematic diagram of lever one, lock buckle one, lever two, and lock buckle two. DETAILED DESCRIPTION

[0023] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0024] [Example 1]

[0025] A single-pole handle linked multi-stage mechanism, such as Figure 1-Figure 4 , including operating mechanism 1 and operating mechanism 2, operating mechanism 1 (main operating mechanism) including outer handle 10, lever 1 42, lock 1 40, spring and other mechanisms, operating mechanism 1 is connected to the moving contact, operating mechanism 2 includes inner handle 11, lever 2 32, lock 2 31 and reset elastic member 34, reset elastic member 34 in this embodiment adopts spring, inner handle 11 is coaxially connected with outer handle 10, moves synchronously, lever 1 42 and lever 2 32 are rotatably installed with jump buckles, which are jump buckle 1 41 and jump buckle 2 33 respectively, outer handle 10 and inner handle 1 1 is connected with the first jump buckle 41 and the second jump buckle 33 respectively through the push rod 12, and the jump buckle is used to cooperate with the lock buckle to achieve locking (this part is the existing technology, such as CN209766342U, CN112837973A, etc.). The improvement made in this scheme is: the second lock buckle 31 is rotatably installed on the second lever 32, and a plane 311 is provided on the second lock buckle 31 for cooperating with the release device 50. The moving iron core in the release device 50 can contact with the surface 311 to make the second lock buckle 31 actuate, and further, the area of ​​the plane 311 is larger than the cross-sectional area of ​​the moving iron core.

[0026] like Figure 5-Figure 7 In this embodiment, a force-bearing protrusion 401 is provided on the lock buckle 1 40, and a toggle portion 321 is provided on the lever 2 32. The toggle portion 321 pushes the force-bearing protrusion 401 to realize the transmission of the lever 2 32 to the lock buckle 1 40. In other embodiments, transmission can also be realized by providing other transmission components such as connecting rods. Preferably, the force-bearing protrusion 401 is cylindrical, and the toggle portion 321 is provided with a curved surface for contacting the force-bearing protrusion 401 to ensure the smoothness of the transmission.

[0027] like Figure 1 The lock buckle 2 31 is provided with an empty slot 313 to reduce the weight of the lock buckle 2 31 , making it easier to push and reducing the cost.

[0028] The lock buckle 2 31, the reset elastic member 34 and the lever 2 32 constitute a force amplification mechanism, which is not available in conventional leakage circuit breakers. The operating mechanisms 1 and 2 of conventional leakage circuit breakers are generally of the same structure. When the force of the release device is relatively small, it is difficult to trigger the main operating mechanism. In this solution, when the handle is closed, the lever 1 42 is actuated to close the moving and static contacts, and the lever 2 32 is actuated to compress the reset elastic member 34. When leakage occurs in the line or a person is electrocuted, the release device 50 is triggered (a magnetic motive force is generated as soon as the voltage coil is energized, and the moving iron core moves toward the static iron core under its action). The moving iron core pushes the lock buckle 2 31 to unlock, and the lever 2 32 rotates rapidly under the action of the reset elastic member 34, and moves the lock buckle 1 40, so that the lock buckle 1 40 is unlocked. At this time, the lever 1 42 can be actuated to realize the opening of the main operating mechanism and disconnect the circuit, so that when the product is at a voltage of 50V, the release device can trigger the operating mechanism with a relatively small force, thereby avoiding the burning of the coil of the release device.

[0029] Embodiment 2: Based on Embodiment 1, a limiting portion 312 is provided on the lock buckle 31, and the limiting portion 312 is used to move the lock buckle 31 to a position where it can engage with the jump buckle 33 again after the release device pushes the lock buckle 31 to move, that is, when the moving iron core pushes the lock buckle 31, the lock buckle 31 can return to the position where the trip buckle 33 can engage with the trip buckle 33 again. Figure 1 The handle is in the middle state so that it can engage with the jump buckle 2 33 when the handle is closed again. In this embodiment, the limiting part 312 adopts a rod part that is arranged on the lock buckle 2 31 and can undergo a certain elastic deformation. A raised rib that cooperates with the limiting part 312 is arranged on the shell of the leakage circuit breaker. When the lock buckle 2 31 rotates, the limiting part 312 will hit the rib of the shell, causing squeezing and generating a reaction force, thereby prompting the lock buckle 2 31 to reset.

[0030] A leakage circuit breaker is provided with the above-mentioned single-pole handle linked multi-stage mechanism.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A single-pole handle linked multi-stage mechanism, characterized in that: The invention comprises a lever (42), a lever (32), a lock buckle (40), a lock buckle (31) and a reset elastic member (34), wherein the lock buckle (31) is mounted on the lever (32), the reset elastic member (34) is connected to the lever (32), the lock buckle (31) and the lever (32) form an amplification mechanism, and when the release device is actuated, the lock buckle (31) can be pushed to unlock, and the lever (32) can move the lock buckle (40) under the action of the reset elastic member (34), so that the lock buckle (40) is unlocked, and at this time, the lever (42) is actuated to realize the opening of the operating mechanism.

2. The monopolar handle linkage multi-stage mechanism according to claim 1, characterized in that: The lock buckle 1 (40) is provided with a force-bearing protrusion (401), and the lever 2 (32) is provided with a toggle portion (321).

3. The monopolar handle linkage multi-stage mechanism according to claim 2, characterized in that: The force-bearing protrusion (401) is cylindrical, and the shifting portion (321) is provided with a curved surface for contacting the force-bearing protrusion (401).

4. The monopolar handle linkage multi-stage mechanism according to any one of claims 1 to 3, characterized in that: The second lock buckle (31) is provided with an empty slot (313) for reducing the weight of the second lock buckle (31).

5. The monopolar handle linkage multi-stage mechanism according to claim 1, characterized in that: The handle mechanism is connected to the first jump buckle (41) and the second jump buckle (33) through a push rod (12), respectively. The first jump buckle (41) and the second jump buckle (33) are respectively mounted on the first lever (42) and the second lever (32).

6. The monopolar handle linkage multi-stage mechanism according to claim 5, characterized in that: The second lock buckle (31) is provided with a limiting portion (312), and the limiting portion (312) is used to move the second lock buckle (31) to a position where it can engage with the second jump buckle (33) again after the release device pushes the second lock buckle (31) to move.

7. The monopolar handle linkage multi-stage mechanism according to claim 4, characterized in that: The contact end surface of the second lock (31) and the moving iron core of the release device is a plane (311) larger than the cross-sectional area of ​​the moving iron core.

8. The monopolar handle linkage multi-stage mechanism according to claim 1, characterized in that: The resetting elastic member (34) is a spring.

9. A leakage circuit breaker, characterized in that: The leakage circuit breaker is provided with a single-pole handle linked multi-stage mechanism as described in any one of claims 1 to 8.

10. The residual current circuit breaker according to claim 9, characterized in that: A rib cooperating with the limiting portion (312) is provided on the housing of the leakage circuit breaker.

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