Tripping action executing mechanism of electric leakage module and circuit breaker

Abstract

The utility model discloses a tripping action executing mechanism of an electric leakage module, which comprises a support and a first push rod, the first push rod moves to a tripping position along a set reset position relative to the support, and the front end of the first push rod is used for driving a circuit breaker to trip at the tripping position; the lock catch can move within a set range relative to the support, and the movable iron core drives the lock catch to act. The utility model also discloses a circuit breaker. According to the utility model, the transmission structure of the first push rod and the lock catch is adopted, the tripping of the circuit breaker driven by the iron core is realized, the transmission structure is simple, the number of parts is small, the occupied space is small, and the installation is convenient; the position change of the first push rod on the linear action drives the switching of tripping and resetting, the action is simple and reliable, the stroke is constant, the matching mode of the first push rod and the lock catch is not influenced by errors, each tripping action can be stable and unified, and the effectiveness and the speed of tripping are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and relates to a tripping action execution mechanism of a leakage module and a circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. By setting a tripping structure, it can quickly trip when leakage, short circuit, etc. occur in the circuit breaker circuit.

[0003] In dealing with the situation of leakage current, traditional circuit breakers mostly adopt a tripping structure including a coil and an iron core. For example, the tripping device for a leakage circuit breaker disclosed in Chinese Utility Model Patent CN107658196A uses multiple linkage rods to transfer the kinetic energy of the moving iron core to achieve the tripping effect. Obviously, there are problems such as a large number and complexity of the transmission structures, resulting in excessive occupation of the internal volume of the circuit breaker and complex installation. Moreover, the complex transmission structure is prone to action transmission errors, leading to situations where the action of the iron core cannot be truly and quickly reflected, resulting in late tripping or non-tripping. Another example is the magnetic flux converter of the circuit breaker disclosed in Chinese Utility Model Patent CN210984667U. Although it has few parts and a compact structure, the relative setting of its tripping push rod and the iron core limits the tripping directions it can achieve, making it not very applicable in general circuit breaker products. And for achieving a rapid tripping effect within 100 ms in the case of leakage current, the rotation and cooperation fixation method of its iron core and the tripping push rod results in a complex action stroke and is very dependent on the sensitivity of the moving iron core under leakage current, making it difficult to ensure the speed of responding to leakage current tripping. Summary of the Utility Model

[0004] The utility model aims to overcome the deficiencies of the prior art and provides a tripping action execution mechanism of a leakage module and a circuit breaker.

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

[0006] A tripping action execution mechanism of a leakage module includes a bracket and a first push rod. The first push rod moves relative to the bracket from a set reset position to a tripping position, and the front end of the first push rod is used to drive the tripping of the circuit breaker at the tripping position. It also includes a latch that can move relative to the bracket within a set range and a moving iron core that drives the latch to act. The latch abuts against the first push rod at the reset position and disengages from the first push rod at the tripping position.

[0007] Further, a connecting member and a spring are provided on the bracket. The connecting member is fixedly connected to the bracket. Two ends of the spring are respectively connected to the first push rod and the connecting member, and the elastic force direction of the spring is the same as the moving direction of the first push rod.

[0008] Further, a rotating shaft is provided on the bracket. The locking buckle is sleeved on the rotating shaft and rotates relative to the bracket with the rotating shaft as the center. A torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected to the locking buckle and the bracket.

[0009] Further, a blocking block is provided at one end of the locking buckle, a clamping groove is provided on the first push rod, and an opening for the blocking block to move in and out is provided on the clamping groove. In the reset position, the blocking block is located in the clamping groove and abuts against the inner wall of the clamping groove.

[0010] Further, a tail rod is provided at one end of the locking buckle. The tail rod is within the axial movement range of the moving iron core. When the circuit breaker has a leakage, the moving iron core moves and abuts against the tail rod, pushing the locking buckle to rotate, and the blocking block disengages from the clamping groove.

[0011] Further, a reset button is further included. The reset button is slidably connected to the bracket. A lever is hinged on the bracket. A clamping portion is provided on the first push rod. A second sliding groove for the clamping portion to pass through is provided on the bracket. Two ends of the lever are respectively connected to the reset button and the clamping portion.

[0012] Further, a first sliding groove is opened on the bracket along the moving direction of the first push rod. A sliding portion is provided on the first push rod, and the sliding portion passes through the first sliding groove.

[0013] Further, a second push rod is further included. A connecting shaft is provided on the bracket. The rear end of the second push rod is sleeved on the connecting shaft and rotates relative to the bracket with the connecting shaft as the center. The center of gravity of the second push rod is located at the front end. An abutting end is provided on the second push rod, and the abutting end abuts against the first push rod in the moving direction of the first push rod.

[0014] Further, a micro switch is further included. A lamp bead is electrically connected to the micro switch. A triggering portion for triggering the micro switch is provided at the front end of the second push rod.

[0015] A circuit breaker, in which a tripping action execution mechanism of the above-mentioned leakage module is provided.

[0016] In summary, the beneficial effects of the present utility model are as follows:

[0017] The utility model adopts the transmission structure of the first push rod and the lock, realizes the tripping of the circuit breaker driven by the iron core, has a simple transmission structure, few components, small occupied space and is convenient to install; the position change of the first push rod in the linear motion drives the switching between tripping and resetting, the action is simple and reliable, and its stroke is constant. The cooperation mode with the lock is not affected by errors, so that each tripping action can be stable and unified, ensuring the effectiveness and speed of tripping; the action modes of the lock with the iron core and the lock with the first push rod are both simple and direct, which are the action modes of resisting and separating. As the action transmission part of the iron core, the lock can quickly transmit the action and realize the rapid tripping response to the leakage current. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the reset position of the action execution mechanism of the utility model.

[0019] Figure 2 It is Figure 1 The structural schematic diagram from another perspective in

[0020] Figure 3 It is Figure 1 The structural schematic diagram of the first push rod and the lock part in

[0021] Figure 4 It is a schematic structural diagram of the tripping position of the action execution mechanism of the utility model.

[0022] Figure 5 It is Figure 4 The structural schematic diagram from another perspective in

[0023] Figure 6 It is Figure 4 The structural schematic diagram of the first push rod and the lock part in

[0024] Figure 7 It is the structural schematic diagram of the reset button and the lever part.

[0025] Figure 8 It is the structural schematic diagram of the connection spring part between the first push rod and the bracket.

[0026] Figure 9 It is the structural schematic diagram of the lock and the moving iron core part.

[0027] Identifications in the figure: 1. Bracket; 11. First chute; 12. Second chute; 13. Connecting piece; 2. First push rod; 21. Sliding part; 22. Clamping part; 23. Card slot; 24. Spring; 25. Buckle part; 3. Lock; 31. Block; 32. Tail rod; 33. Rotating shaft; 34. Torsion spring; 4. Reset button; 41. Square groove; 5. Lever; 51. Rivet; 6. Second push rod; 61. Connecting shaft; 62. Trigger part; 63. Abutting end; 7. Moving iron core. Detailed implementation manners

[0028] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0029] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0030] All directional indications (such as up, down, left, right, front, back, horizontal, vertical...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0031] Due to reasons such as installation errors, the parallel relationship referred to in the embodiments of the present utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0032] The present utility model provides an action execution mechanism for a leakage module applied in a circuit breaker. The action execution mechanism is used to execute the tripping action when a leakage occurs in the circuit breaker and to execute the reset action after the circuit breaker trips.

[0033] Referring to Figure 1 and Figure 4 , the action execution mechanism includes: a bracket 1, a first push rod 2, a second push rod 6, a lever 5, a latch 3, a moving iron core 7, and a reset button 4. The bracket 1 is fixedly arranged inside the circuit breaker, and the first push rod 2, the second push rod 6, the lever 5, the latch 3, the moving iron core 7, and the reset button 4 are all correspondingly installed on the bracket 1.

[0034] Specifically, referring to Figure 8 , the first push rod 2 is slidably matched with the bracket 1 and can move relative to the bracket 1 in a straight line direction. A first chute 11 is opened on the bracket 1 in the straight line direction. A sliding part 21 is arranged on the first push rod 2, and the sliding part 21 passes through the first chute 11 and slides along the first chute 11.

[0035] A second chute 12 is further formed in the bracket 1 in a straight line direction. Correspondingly, a clamping portion 22 is provided on the first push rod 2. The clamping portion 22 is inserted into the second chute 12 and slides along the second chute 12. The first chute 11 and the second chute 12 jointly define the position between the first push rod 2 and the bracket 1, and define the movement locus of the first push rod 2.

[0036] The reset button 4 is arranged on the bracket 1, and an elastic member is arranged in the circuit breaker and connected to the reset button 4, so that the reset button 4 has the function of being able to press and fluctuate. Furthermore, the reset button 4 can move up and down relative to the bracket 1 in the vertical direction.

[0037] Refer to Figure 1 、 Figure 4 and Figure 7 The shift lever 5 is hinged to the bracket 1 by a rivet 51 and can rotate relative to the bracket 1 with the rivet 51 as the center. Two ends are formed on the shift lever 5. One end is connected to the reset button 4, and the other end is connected to the clamping portion 22. Specifically, a square groove 41 is provided on the reset button 4 for one end to be inserted, and a notch is formed in the middle of the clamping portion 22 for the other end to be inserted. The two ends are movable in the square groove 41 and the notch, and the outer periphery of the end will abut against the inner wall of the square groove 41 or the inner wall of the notch to generate a certain acting force during the action.

[0038] When the reset button 4 moves up and down, it will drive the shift lever 5 to rotate, and further drive the clamping portion 22 to move along the second chute 12 through the shift lever 5, so as to drive the first push rod 2 to move.

[0039] Refer to Figure 2 and Figure 5 The second push rod 6 is arranged on the lower side of the bracket 1. A connecting shaft 61 is fixedly installed on the bracket 1. The second push rod 6 is arranged on the connecting shaft 61 and can rotate relative to the axis of the connecting shaft 61. An abutting end 63 is provided on the second push rod 6. The abutting end 63 abuts upward against the rear end of the first push rod 2. When the first push rod 2 moves, it drives the second push rod 6 to rotate by pushing the abutting end 63.

[0040] Refer to Figure 3 and Figure 6, a rotating shaft 33 is fixedly arranged on the bracket 1, the latch 3 is arranged on the rotating shaft 33 and can rotate relative to the axis of the rotating shaft 33, a torsion spring 34 is sleeved on the rotating shaft 33, and two ends of the torsion spring 34 are respectively connected with the latch 3 and the bracket 1 to generate a certain state maintaining force or reset force on the latch 3.

[0041] The first push rod 2 is respectively in a tripping position and a reset position at two different positions within its movement range. Among them, a connecting piece 13 is fixedly arranged on the bracket 1, a spring 24 is arranged between the connecting piece 13 and the first push rod 2, two ends of the spring 24 are respectively connected to the connecting piece 13 and the first push rod 2, and the spring 24 provides an elastic force for the first push rod 2 to move towards the tripping position.

[0042] A stop block 31 is formed on the latch 3, a clamping groove 23 is arranged at the bottom of the first push rod 2, and an open connection is arranged below the clamping groove 23 for the stop block 31 to enter the clamping groove 23 from bottom to top. The latch 3 includes two positions within its rotation range. One position is set such that when the first push rod 2 is in the reset position, the stop block 31 is located inside the clamping groove 23, and the inner wall of the rear end of the clamping groove 23 abuts against the stop block 31 to prevent the first push rod 2 from moving; the other position is set such that when the latch 3 rotates to make the stop block 31 move downward out of the clamping groove 23, the first push rod 2 is in a movable state at this time.

[0043] The moving iron core 7 is arranged on the lower side of the bracket 1, and a coil is arranged on the outer periphery of the moving iron core 7. When a leakage current occurs in the circuit breaker, the leakage current causes the coil to generate a magnetic field, and the magnetic field drives the moving iron core 7 to act axially. Refer to Figure 9 , a tail rod 32 extends downward from the latch 3, the tail rod 32 is located on the axial direction of the moving iron core 7, and when the moving iron core 7 is driven to move axially, it will abut against the tail rod 32 and then drive the latch 3 to rotate, so that the stop block 31 moves downward out of the clamping groove 23.

[0044] In the circuit breaker of this embodiment, when it is in a normal working state, reset to the initial state or working state, the first push rod 2 is in the reset position, and the stop block 31 is located in the clamping groove 23 to abut against the first push rod 2. At this time, if a leakage current occurs, the moving iron core 7 drives the latch 3 to rotate to make the stop block 31 disengage from the clamping groove 23, and then the first push rod 2 moves to the tripping position under the push of the spring 24.

[0045] When reset is required in the above-mentioned tripping position, by pressing down the reset button 4, the lever 5 is driven to rotate to drive the first push rod 2 to move to the reset position. At this time, the latch 3 is driven by the restoring force of the torsion spring 34, and the stopper 31 is driven to move upward into the clamping groove 23 to hold the first push rod 2 and maintain it in the reset position.

[0046] The circuit breaker in this embodiment is provided with a switch and a release connected to the switch. The release is provided with a reaction spring. The front end of the first push rod 2 is set as a buckle part 25. When the first push rod 2 is in the reset position, the buckle part 25 abuts against the release to make it tensioned under the action of the reaction spring. When the first push rod 2 is triggered to the tripping position, the buckle part 25 is disengaged from the release, and the reaction spring 24 acts on the release to drive the switch to trip quickly.

[0047] The front end of the second push rod 6 is set as a trigger part 62. The connecting shaft 61 is located at the rear end of the second push rod 6. The center of gravity of the second push rod 6 is close to the front end position, so that the second push rod 6 can keep the abutting end 63 in abutment with the first push rod 2. Then, when the first push rod 2 moves from the tripping position to the reset position, the first push rod 2 pushes the abutting end 63 to drive the second push rod 6 to rotate and move, so that the trigger part 62 moves upward by a certain distance. By arranging a micro switch above the trigger part 62, the micro switch is electrically connected to a display device, such as a lamp bead, etc. When the trigger part 62 is lifted, the micro switch can be triggered, and then the lamp bead is lit to display the current reset state of the circuit breaker.

[0048] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A tripping action execution mechanism for a leakage module, characterized in that, It includes a bracket (1) and a first push rod (2). The first push rod (2) moves relative to the bracket (1) from a set reset position to a tripping position. The front end of the first push rod (2) is used to drive the tripping of the circuit breaker at the tripping position. It further includes a latch (3) that can move relative to the bracket (1) within a set range, and a moving iron core (7) that drives the latch (3) to act. The latch (3) abuts against the first push rod (2) at the reset position and disengages from the first push rod (2) at the tripping position.

2. The trip action actuator of a leakage module according to claim 1, characterized in that, A connecting piece (13) and a spring (24) are provided on the bracket (1). The connecting piece (13) is fixedly connected to the bracket (1). The two ends of the spring (24) are respectively connected to the first push rod (2) and the connecting piece (13). The elastic force direction of the spring (24) is the same as the moving direction of the first push rod (2).

3. The trip action execution mechanism of a leakage module according to claim 1, characterized in that, A rotating shaft (33) is provided on the bracket (1). The latch (3) is sleeved on the rotating shaft (33) and rotates relative to the bracket (1) with the rotating shaft (33) as the center. A torsion spring (34) is sleeved on the rotating shaft (33). The two ends of the torsion spring (34) are respectively connected to the latch (3) and the bracket (1).

4. The trip action actuator of a leakage module according to claim 3, characterized in that, A stop block (31) is provided at one end of the latch (3). A card slot (23) is provided on the first push rod (2). An opening for the stop block (31) to move in and out is provided on the card slot (23). At the reset position, the stop block (31) is located within the card slot (23) and abuts against the inner wall of the card slot (23).

5. The trip action actuator of a leakage module according to claim 4, characterized in that, A tail rod (32) is provided at one end of the latch (3). The tail rod (32) is within the axial movement range of the moving iron core (7). When the circuit breaker leaks electricity, the moving iron core (7) acts and abuts against the tail rod (32), pushing the latch (3) to rotate, and the stop block (31) disengages from the card slot (23).

6. The trip action actuator of a leakage module according to claim 1, characterized in that, It further includes a reset button (4). The reset button (4) is slidably connected to the bracket (1). A toggle lever (5) is hinged on the bracket (1). A clamping portion (22) is provided on the first push rod (2). A second sliding groove (12) for the clamping portion (22) to pass through is provided on the bracket (1). The two ends of the toggle lever (5) are respectively connected to the reset button (4) and the clamping portion (22).

7. The trip action actuator of a leakage module according to claim 1 or 6, characterized in that, A first sliding groove (11) is provided on the bracket (1) along the moving direction of the first push rod (2). A sliding portion (21) is provided on the first push rod (2). The sliding portion (21) passes through the first sliding groove (11).

8. The tripping action execution mechanism of a leakage module according to claim 1, characterized in that, It further includes a second push rod (6). A connecting shaft (61) is provided on the bracket (1). The rear end of the second push rod (6) is sleeved on the connecting shaft (61) and rotates relative to the bracket (1) with the connecting shaft (61) as the center. The center of gravity of the second push rod (6) is located at the front end. An abutting end (63) is provided on the second push rod (6). The abutting end (63) abuts against the first push rod (2) in the moving direction of the first push rod (2).

9. The trip action actuator of a leakage module according to claim 8, characterized in that, It further includes a microswitch, the microswitch is electrically connected to a lamp bead, and a trigger part (62) for triggering the microswitch is provided at the front end of the second push rod (6).

10. A circuit breaker, characterized in that, The circuit breaker is provided with a tripping action execution mechanism of the leakage module as described in any one of claims 1-9.

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