Magnetic trip protection structure

Abstract

The magnetic tripping protection structure comprises a magnetic flux tripper, a draw bar, a backup tripper, an opening button and an opening and closing mechanism, and further comprises a push plate, and the push plate is integrally provided with a pressing surface, a striking surface, a triggering surface and a pushing surface; the opening button can directly push the pressing surface to drive the push plate, so that the push surface directly pushes the releasing rod to drive the opening and closing mechanism to release; the striking rod can directly push the striking surface to drive the push plate, so that the push surface directly pushes the releasing rod to drive the opening and closing mechanism to release; the back-up release can drive the draw bar to rotate, so that the draw bar directly pushes the trigger surface to drive the push plate, and the push surface directly pushes the release rod to drive the opening and closing mechanism to release. According to the magnetic trip protection structure of the utility model, a linkage connecting rod of a backup opening and a linkage connecting rod of a manual opening in the prior art are integrated on one part push plate, and the striking rod of the magnetic flux opening is used for directly pushing the push plate, so that the push plate integrates a magnetic flux opening function, a manual opening function and a backup electromagnet opening function.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a magnetic tripping protection structure. Background Art

[0002] Circuit breakers or dual power supplies have a tripping release. When a circuit fault occurs, the controller activates the tripping release to strike the tripping rod of the mechanism, tripping the mechanism. This mechanism then moves the moving contact, disconnecting the main circuit. In the event of a high short-circuit current, the backup electromagnet activates the pull rod, which in turn moves the tripping rod through a linkage, tripping the mechanism and disconnecting the main circuit. For manual tripping, the tripping button activates the linkage, ultimately moving the tripping rod, tripping the mechanism and disconnecting the main circuit.

[0003] However, the existing tripping structure has problems such as many parts, complex installation, increased cost, and reduced reliability. Utility Model Content

[0004] The purpose of the present invention is to overcome at least one defect of the prior art and provide a magnetic tripping protection structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The magnetic trip protection structure includes a magnetic flux release, a traction rod, a backup release, a trip button, and an opening and closing mechanism. The magnetic flux release includes a striking rod, and the opening and closing mechanism includes a trip rod. The magnetic trip protection structure also includes a push plate, and the push plate is integrally provided with a pressing surface, a striking surface, a triggering surface, and a pushing surface.

[0007] The opening button can directly push the pressing surface to drive the push plate, so that the pushing surface directly pushes the tripping rod to drive the opening and closing mechanism to trip;

[0008] The striking rod can directly push the striking surface to drive the push plate, so that the pushing surface directly pushes the tripping rod to drive the opening and closing mechanism to trip;

[0009] The backup release can drive the traction rod to rotate, so that the traction rod directly pushes the trigger surface to drive the push plate, and the push surface directly pushes the trip rod to drive the opening and closing mechanism to trip.

[0010] Optionally, the trip button is arranged to move linearly along a first direction, the striking rod is arranged to move linearly along a second direction, the push plate is arranged to rotate, and the rotation axis of the push plate and the rotation axis of the traction rod are respectively arranged along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the trip button, the push plate and the traction rod are arranged in sequence along the first direction, the push plate and the magnetic flux release are arranged along the second direction, and the push plate and the opening and closing mechanism are arranged along the third direction.

[0011] Optionally, the push plate includes an integrally formed rotating part, a pressure plate, a push plate and a trigger plate, the pressure plate is located on the movement path of the trip button, and the side of the pressure plate facing the trip button is the pressing surface; one side of the push plate is the striking surface located on the movement path of the striking rod, and the other side of the push plate is the pushing surface; the traction rod extends toward the direction close to the push plate and is provided with a first transmission arm for pushing the trigger surface, and the trigger plate has the trigger surface located on the movement path of the first transmission arm.

[0012] Optionally, the rotating portion of the push plate is rotatably mounted on the housing of the magnetic flux release via a push plate rotating shaft, and a push plate spring is provided between the push plate and the housing to provide elastic reset force for the push plate.

[0013] Optionally, the push plate is provided with a first limit arm and a second limit arm respectively extending along the rotation axis direction of the push plate for limiting the rotation stroke of the push plate, and the shell is provided with a first stop surface corresponding to the first limit arm and a second stop surface corresponding to the second limit arm.

[0014] Optionally, the shell includes two mounting plates spaced apart along the rotation axis direction of the push plate, the mounting plates are provided with a first rotating hole that rotatably cooperates with the push plate rotating shaft, the rotating part includes two rotating plates located between the two mounting plates and spaced apart along the rotation axis direction of the push plate, the rotating plates are provided with a second rotating hole that rotatably cooperates with the push plate rotating shaft, and a rotating boss for contacting the mounting plate is provided between at least one rotating plate and the mounting plate on the same side, and a retaining spring that is sleeved on the push plate rotating shaft is provided on the side of the mounting plate facing away from the rotating boss.

[0015] Optionally, the push plate is an L-shaped plate, the push plate is provided with a striking surface and one end of the pushing surface is connected to the pressure plate close to the trip button, and the other end of the push plate is connected to a rotating plate away from the trip button; the trigger plate is a U-shaped plate, the opening of the trigger plate is arranged along the moving direction of the striking rod facing away from the magnetic flux releaser, the inner side of the bottom edge of the trigger plate is the trigger surface, and the two side edges of the trigger plate are respectively connected to the side of the two rotating plates away from the push plate.

[0016] Optionally, the pressure plate is arranged at an oblique angle to the trip button.

[0017] Optionally, the flux release also includes a static iron core, a guide tube, a coil, a skeleton, a moving iron core, and a moving iron core spring installed in the shell, the coil is sleeved on the skeleton, the guide tube is arranged in the axial hole of the skeleton, the static iron core is fixed in one end of the guide tube, the moving iron core is slidably arranged in the other end of the guide tube and is arranged opposite to the static iron core, one end of the striking rod is connected to the moving iron core, and the other end passes through the static iron core and the shell in sequence and is arranged corresponding to the striking surface of the push plate, and the moving iron core spring is sleeved on the striking rod and connected between the moving iron core and the static iron core.

[0018] Optionally, the backup release includes a bracket, a yoke, an armature and an armature spring that provides elastic reset force for the armature, the yoke is fixed on the bracket, the armature is rotatably mounted on the bracket via an armature shaft, and the armature and the yoke are spaced apart and arranged relative to each other; the traction rod extends in a direction close to the armature and is provided with a second transmission arm, and the armature is provided with a trigger arm for pushing the second transmission arm.

[0019] Optionally, the flux release further includes an isolation ring, which is sleeved on an end of the moving iron core away from the static iron core and is located between the moving iron core and the housing.

[0020] Optionally, the guide tube is a copper tube, and / or the isolation ring is a copper ring.

[0021] The magnetic tripping protection structure of the utility model integrates the linkage connecting rod of the backup tripping and the linkage connecting rod of the manual tripping in the prior art into one part push plate, and the striking rod of the magnetic flux tripping is used to directly push the push plate, so that the push plate integrates the magnetic flux tripping function, manual tripping and backup electromagnet tripping functions into one, which reduces the number of parts, reduces the cost, simplifies the structure, reduces the intermediate transition parts, reduces the number of transmission stages, and improves the stability and reliability of the action.

[0022] In addition, the layout is compact and reasonable, saving space, and the movements of the various parts are orderly and non-interfering with each other, which improves reliability.

[0023] In addition, the push plate and the flux release are integrated into one, which facilitates the modular assembly of the circuit breaker, simplifies the assembly process and improves assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the magnetic tripping protection structure of the utility model;

[0025] Figure 2 It is a cross-sectional view of the magnetic trip protection structure of the utility model;

[0026] Figure 3 This is an exploded view of the magnetic trip protection structure of the utility model;

[0027] Figure 4This is a schematic diagram of the push plate of the utility model from one perspective;

[0028] Figure 5 This is a schematic diagram of the push plate of the utility model from another perspective;

[0029] Figure 6 This is an exploded view of the push plate and magnetic flux release of the utility model;

[0030] Figure 7 It is a cross-sectional view of the push plate and the magnetic flux release of the utility model;

[0031] Figure 8 It is an exploded view of the push plate and the magnetic flux release of the utility model.

[0032] Magnetic flux release 100; striking rod 110; housing 120; mounting plate 121; first rotating hole 122; first stop surface 123; second stop surface 124; first screw hole 125; screw 126; static iron core 130; guide tube 140; coil 150; frame 160; moving iron core 170; moving iron core spring 180; isolation ring 190; traction rod 200; first transmission arm 210; second transmission arm 220; backup release 300; bracket 310; yoke 320; armature 330; trigger arm 331; armature spring Spring 340; armature shaft 350; opening button 400; opening and closing mechanism 500; trip rod 510; side plate 520; through hole 521; second screw hole 522; push plate 600; rotating part 610; rotating plate 611; second rotating hole 612; rotating boss 613; pressure plate 620; pressing surface 621; push plate 630; striking surface 631; pushing surface 632; trigger plate 640; trigger surface 641; first limiting arm 642; second limiting arm 643; push plate shaft 700; push plate spring 800; retaining spring 900. DETAILED DESCRIPTION

[0033] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the magnetic tripping protection structure of the present invention. The magnetic tripping protection structure of the present invention is not limited to the description of the following embodiments.

[0034] Switching devices such as dual power automatic transfer switches and circuit breakers have a magnetic tripping protection structure. Taking a circuit breaker as an example, the circuit breaker generally includes a tripping and closing mechanism 500, a contact system and a protection mechanism. The contact system includes a matching moving contact and a static contact. The tripping and closing mechanism 500 is used to drive the moving contact to move, so that the moving contact contacts or separates with the static contact, so as to conduct and disconnect the main circuit of the circuit breaker, thereby closing and opening the circuit breaker. When a fault occurs in the main circuit (short circuit fault, overload fault and / or leakage fault), the protection mechanism drives the tripping and closing mechanism 500 to trip, and the tripping and closing mechanism 500 drives the moving contact to disconnect the main circuit to realize the protection function. The protection mechanism generally includes a magnetic tripping protection structure and / or a thermal tripping protection structure. The thermal tripping protection structure generally uses a bimetallic strip, and the tripping and closing mechanism 500 is tripped by the bending of the bimetallic strip due to heat.

[0035] like Figure 1 As shown, the magnetic trip protection structure of this embodiment includes a magnetic flux release 100, a traction rod 200, a backup release 300, a trip button 400, and an opening and closing mechanism 500. The magnetic flux release 100 includes a striking rod 110, and the opening and closing mechanism 500 includes a trip rod 510. It should be noted that a controller is also provided, and the magnetic flux release 100 is remotely controlled by the controller. This is a prior art and will not be described in detail here.

[0036] When manually opening the circuit breaker, the opening button 400 drives the tripping rod 510 of the opening and closing mechanism 500 to trip the opening and closing mechanism 500, and the opening and closing mechanism 500 drives the moving contact to move, so that the main circuit of the circuit breaker is disconnected; when a circuit fault occurs (one or more of the faults such as overcurrent, overload, over-voltage, undervoltage, leakage, short circuit, etc.), the controller drives the magnetic flux release 100 to strike the tripping rod 510 of the opening and closing mechanism 500 to trip the opening and closing mechanism 500, and the opening and closing mechanism 500 drives the moving contact to move, so that the main circuit of the circuit breaker is disconnected; when a short circuit and large current occur in the main circuit of the circuit breaker, the backup release 300 drives the traction rod 200 to move, and the traction rod 200 drives the tripping rod 510 of the opening and closing mechanism 500 to trip the opening and closing mechanism 500, and the opening and closing mechanism 500 drives the moving contact to move, so that the main circuit of the circuit breaker is disconnected. It should be noted that the controller collects circuit parameters and, if it detects an anomaly, activates the magnetic flux release 100 to disconnect the main circuit. The backup release 300 only activates in the event of a high-current short-circuit, typically at a current greater than 12 times the rated current. Typically, the backup release has a shorter operating time than the magnetic flux release, ensuring rapid and reliable circuit disconnection during high-current faults.

[0037] In particular, the magnetic tripping protection structure of this embodiment also includes a push plate 600, which is integrally provided with a pressing surface 621, a striking surface 631, a triggering surface 641 and a pushing surface 632; the trip button 400 can directly push the pressing surface 621 to drive the push plate 600, so that the pushing surface 632 directly pushes the tripping rod 510 to drive the tripping mechanism 500 to trip; the striking rod 110 can directly push the striking surface 631 to drive the push plate 600, so that the pushing surface 632 directly pushes the tripping rod 510 to drive the tripping mechanism 500 to trip; the backup tripper 300 can drive the traction rod 200 to rotate, so that the traction rod 200 directly pushes the triggering surface 641 to drive the push plate 600, so that the pushing surface 632 directly pushes the tripping rod 510 to drive the tripping mechanism 500 to trip.

[0038] The magnetic tripping protection structure of this embodiment integrates the linkage connecting rod of the backup tripping and the linkage connecting rod of the manual tripping in the prior art into one component push plate 600, and the striking rod 110 of the magnetic flux tripping is used to directly push the push plate 600, so that the push plate 600 integrates the magnetic flux tripping function, manual tripping and backup electromagnet tripping function into one, reducing the number of parts, lowering the cost, simplifying the structure, reducing the intermediate transition parts, reducing the number of transmission stages, and improving the stability and reliability of the action.

[0039] like Figure 1 and Figure 2 As shown, the trip button 400 is arranged to move linearly along a first direction, the striking rod 110 is arranged to move linearly along a second direction, and the push plate 600 is arranged to rotate, with the rotation axes of the push plate 600 and the traction rod 200 respectively arranged along a third direction. The first, second, and third directions are mutually perpendicular. The trip button 400, push plate 600, and traction rod 200 are arranged sequentially along the first direction, the push plate 600 and the magnetic flux release 100 are arranged along the second direction, and the push plate 600 and the opening and closing mechanism 500 are arranged along the third direction. The layout is compact and reasonable, saving space, and the various components operate in an orderly and non-interfering manner, thereby improving reliability.

[0040] It should be noted that the first direction refers to Figure 2 The second direction is the up and down direction. Figure 2 The left and right directions, the third direction Figure 2 The tripping technology of the opening and closing mechanism 500 is an existing technology. The opening and closing mechanism 500 can be a four-link or five-link operating mechanism. For example, the opening and closing mechanism 500 is a four-link operating mechanism, including a driving rod, a limiter, and a tripping rod 510. By pushing the tripping rod 510 to release the snap fit between the driving rod and the limiter, the opening and closing mechanism 500 can be tripped to drive the moving contact and the static contact to separate. No further details are given here. In this embodiment, if Figure 2 and Figure 3 As shown, the tripping rod 510 of the opening and closing mechanism 500 is rotatably arranged, and the rotation axis of the tripping rod 510 is arranged along the first direction. One end of the tripping rod 510 passes through the through hole 521 on the side plate 520 of the opening and closing mechanism 500 and is arranged corresponding to the pushing surface 632 of the push plate 600.

[0041] like Figure 2 、 Figure 4 and Figure 5 As shown, the push plate 600 of this embodiment includes an integrally formed rotating portion 610, a pressure plate 620, a push plate 630 and a trigger plate 640, wherein the pressure plate 620 is located on the movement path of the trip button 400, and the side of the pressure plate 620 facing the trip button 400 is the pressing surface 621; one side of the push plate 630 is the striking surface 631 located on the movement path of the striking rod 110, and the other side of the push plate 630 is the pushing surface 632; the traction rod 200 extends in a direction close to the push plate 600 and is provided with a first transmission arm 210 for pushing the trigger surface 641, and the trigger plate 640 has the trigger surface 641 located on the movement path of the first transmission arm 210.

[0042] like Figure 3 As shown, the rotating portion 610 of the push plate 600 is rotatably mounted on the housing 120 of the magnetic flux release 100 via a push plate rotating shaft 700. A push plate spring 800 is provided between the push plate 600 and the housing 120 to provide an elastic reset force for the push plate 600. The magnetic flux release 100 is secured to the side plate 520 of the opening and closing mechanism 500 via screws 126. The housing 120 of the magnetic flux release 100 has a first screw hole 125 that mates with the screw 126, and the side plate 520 of the opening and closing mechanism 500 has a second screw hole 522 that mates with the screw 126. The screw 126 is inserted into the first screw hole 125 and the second screw hole 522. The push plate 600 is integrated with the magnetic flux release 100, facilitating modular assembly of the circuit breaker, simplifying the assembly process, and improving assembly efficiency.

[0043] like Figure 4 and Figure 8As shown, the rotation limiting structure of the push plate 600 of this embodiment is provided with a first limiting arm 642 and a second limiting arm 643 extending along the rotation axis direction of the push plate 600 for limiting the rotation stroke of the push plate 600. The housing 120 is provided with a first stop surface 123 corresponding to the first limiting arm 642 and a second stop surface 124 corresponding to the second limiting arm 643. When the tripping mechanism is in an untripped state, the first limiting arm 642 of the push plate 600 abuts against the first stop surface 123 of the housing 120, and the second limiting arm 643 of the push plate 600 is spaced apart from the second stop surface 124 of the housing 120. When the tripping mechanism is in a tripped state, the second limiting arm 643 of the push plate 600 abuts against the second stop surface 124 of the housing 120, and the first limiting arm 642 of the push plate 600 abuts against the first stop surface 123 of the housing 120.

[0044] like Figure 4 and Figure 8 As shown, the rotational mounting structure of the push plate 600 of this embodiment comprises two mounting plates 121 spaced apart along the rotation axis of the push plate 600. The mounting plates 121 are provided with first rotation holes 122 that rotatably engage with the push plate shaft 700. The rotating portion 610 comprises two rotating plates 611 spaced apart along the rotation axis of the push plate 600 between the two mounting plates 121. The rotating plates 611 are provided with second rotation holes 612 that rotatably engage with the push plate shaft 700. A rotation boss 613 for contacting the mounting plate 121 is provided between at least one rotating plate 611 and the mounting plate 121 on the same side. A retaining spring 900 that sleeves on the push plate shaft 700 is provided on the side of the mounting plate 121 facing away from the rotation boss 613. The rotation boss 613 is located at the contact position between the push plate 600 and the housing 120, reducing the contact area and avoiding the risk of jamming. The rotating boss 613 is preferably an annular protrusion arranged around the second rotating hole 612.

[0045] Exemplarily, a rotating boss 613 is provided between only one rotating plate 611 and the mounting plate 121 on the same side, and there is an accommodating gap between the other rotating plate 611 and the mounting plate 121 on the same side. The push plate spring 800 is a torsion spring, which is sleeved on the push plate shaft 700, and its two ends are respectively connected to the other rotating plate 611 and the mounting plate 121 on the same side.

[0046] In this embodiment, if Figure 4 and Figure 5As shown, the push plate 630 is an L-shaped plate, and the push plate 630 is provided with a striking surface 631 and a pushing surface 632. One end of the push plate 630 is connected to the pressure plate 620 close to the trip button 400, and the other end of the push plate 630 is connected to the rotating plate 611 provided with a rotating boss 613 away from the trip button 400; the trigger plate 640 is a U-shaped plate, and the opening of the trigger plate 640 is arranged along the moving direction of the striking rod 110 and away from the magnetic flux release 100. The inner side of the bottom edge of the trigger plate 640 is the trigger surface 641, and the two side edges of the trigger plate 640 are respectively connected to the side of the two rotating plates 611 away from the push plate 630; the outer side of one side of the trigger plate 640 connected to the rotating plate 611 provided with the rotating boss 613 is respectively provided with a first limiting arm 642 and a second limiting arm 643 extending along the rotation axis direction of the push plate 600.

[0047] Preferably, the pressing plate 620 is arranged at an oblique angle to the trip button 400, so that the trip button 400 can push the push plate 600 to rotate, thereby avoiding the problem of the trip button 400 and the push plate 600 being stuck.

[0048] like Figure 7 and Figure 8 As shown, the flux release 100 of this embodiment has multiple implementation modes. Optionally, the flux release 100 also includes a static iron core 130, a guide tube 140, a coil 150, a skeleton 160, a moving iron core 170, a moving iron core spring 180 and an isolation ring 190 installed in the shell 120, the coil 150 is sleeved on the skeleton 160, the guide tube 140 is arranged in the axial hole of the skeleton 160, the static iron core 130 is fixed in one end of the guide tube 140, the moving iron core 170 is slidably arranged in the other end of the guide tube 140 and is arranged opposite to the static iron core 130, one end of the striking rod 110 is connected to the moving iron core 170, and the other end passes through the static iron core 130 and the shell 120 in sequence and is arranged corresponding to the striking surface 631 of the push plate 600, and the moving iron core spring 180 is sleeved on the striking rod 110 and connected between the moving iron core 170 and the static iron core 130. The controller switches the control coil 150 on and off, thereby controlling the movable iron core 170 to drive the striking rod 110, thereby remotely controlling the circuit breaker to trip and open. When a circuit fault occurs, the controller energizes the control coil 150, causing the movable iron core 170 to engage with the static iron core 130 under the action of electromagnetic force. The striking rod 110 moves with the movable iron core 170 to push against the striking surface 631 of the push plate 600, thereby driving the push plate 600. The pushing surface 632 of the push plate 600 pushes against the trip rod 510, causing the opening and closing mechanism 500 to trip. Of course, the magnetic flux tripper 100 can also adopt other existing structures.

[0049] The isolation ring 190 is mounted on the end of the moving core 170 away from the static core 130 and is located between the moving core 170 and the housing 120. The isolation ring 190 serves to separate the moving core 170 from the housing 120 to prevent direct contact between the moving core 170 and the housing 120. If the moving core 170 directly contacts the housing 120, the air gap between the moving core 170 and the housing 120 is much smaller than the air gap between the moving core 170 and the static core 130. As a result, the suction force on the moving core 170 from the housing 120 is greater than the suction force on the static core 130. When the coil 150 is energized, the moving core 170 will not move toward the static core 130 and will remain stationary in its original position. The isolation ring 190 is preferably a copper ring, although the material of the isolation ring 190 can also be replaced with other non-magnetic materials, such as plastic. Of course, as another modified embodiment, the isolation ring 190 may not be provided, and the moving iron core 170 and the housing 120 may be spaced apart.

[0050] The guide tube 140 is slidably matched with the movable iron core 170, so that the movable iron core 170 moves smoothly in the guide tube 140 and reduces friction. The guide tube 140 is preferably made of copper. Of course, the material of the guide tube 140 can be replaced by other non-magnetic metal materials.

[0051] like Figure 1 and Figure 2 As shown, the backup release 300 of this embodiment includes a bracket 310, a yoke 320, an armature 330, and an armature spring 340 that provides elastic restoring force for the armature 330. The yoke 320 is fixed to the bracket 310, and the armature 330 is rotatably mounted on the bracket 310 via an armature shaft 350. The armature 330 and the yoke 320 are arranged opposite to each other with a gap. The traction rod 200 is provided with a second transmission arm 220 extending in a direction close to the armature 330. The armature 330 is provided with a trigger arm 331 for pushing the second transmission arm 220.

[0052] It should be noted that the backup release 300 of this embodiment has multiple implementation methods. Optionally, the bracket 310, yoke 320, and armature 330 are all U-shaped structures, the yoke 320 is attached to the outer side of the bracket 310, and the bottom edge of the yoke 320 is riveted and fixed to the bottom edge of the bracket 310. The opening of the armature 330 faces the yoke 320, and the two side edges of the armature 330 are respectively attached to the outer sides of the two side edges of the bracket 310, and the two side edges of the armature 330 and the two side edges of the bracket 310 are provided with armature shaft holes that cooperate with the armature shaft 350. The two side edges of the armature 330 and the two side edges of the yoke 320 are respectively arranged relative to each other, and the bottom edge of the armature 330 extends in the direction away from the yoke 320 and is provided with the trigger arm 331. In this embodiment, the armature spring 340 is a torsion spring, which is mounted on the armature shaft 350. One end of the armature spring 340 abuts the bottom edge of the armature 330, and the other end abuts the bottom edge of the bracket 310. In this embodiment, the rotation axis of the armature 330 is arranged along the rotation axis of the traction rod 200, and the first transmission arm 210 and the second transmission arm 220 of the traction rod 200 are located on both sides of the rotation axis of the traction rod 200.

[0053] When a short circuit occurs in the circuit breaker, the armature 330 rotates to overcome the elastic force of the armature spring 340, causing the two sides of the armature 330 to engage with the two sides of the yoke 320, respectively. This causes the trigger arm 331 of the armature 330 to push against the second transmission arm 220 of the drawbar 200, thereby rotating the drawbar 200. Subsequently, the first transmission arm 210 of the drawbar 200 pushes against the trigger surface 641 of the push plate 600, thereby driving the push plate 600. This causes the push surface 632 of the push plate 600 to directly push against the tripping rod 510 of the opening and closing mechanism 500, thereby causing the opening and closing mechanism 500 to trip. Of course, the backup release 300 may also employ other existing structures.

[0054] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0055] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A magnetic tripping protection structure, comprising a magnetic flux tripper (100), a traction rod (200), a backup tripper (300), a tripping button (400), and a tripping and closing mechanism (500), wherein the magnetic flux tripper (100) comprises a striking rod (110), and the tripping and closing mechanism (500) comprises a tripping rod (510), and is characterized in that: The magnetic tripping protection structure further comprises a push plate (600), wherein the push plate (600) is integrally provided with a pressing surface (621), a striking surface (631), a triggering surface (641) and a pushing surface (632); The opening button (400) can directly push against the pressing surface (621) to drive the push plate (600), so that the pushing surface (632) directly pushes against the tripping rod (510) to drive the opening and closing mechanism (500) to trip; The striking rod (110) can directly push the striking surface (631) to drive the push plate (600), so that the pushing surface (632) directly pushes the tripping rod (510) to drive the opening and closing mechanism (500) to trip; The backup release (300) can drive the traction rod (200) to rotate, so that the traction rod (200) directly pushes the trigger surface (641) to drive the push plate (600), and the push surface (632) directly pushes the trip rod (510) to drive the opening and closing mechanism (500) to trip.

2. The magnetic trip protection structure according to claim 1, characterized in that: The trip button (400) is arranged to move linearly along a first direction, the striking rod (110) is arranged to move linearly along a second direction, the push plate (600) is arranged to rotate, and the rotation axis of the push plate (600) and the rotation axis of the traction rod (200) are respectively arranged along a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the trip button (400), the push plate (600) and the traction rod (200) are arranged in sequence along the first direction, the push plate (600) and the magnetic flux release (100) are arranged along the second direction, and the push plate (600) and the opening and closing mechanism (500) are arranged along the third direction.

3. The magnetic trip protection structure according to claim 1 or 2, characterized in that: The push plate (600) comprises an integrally formed rotating portion (610), a pressure plate (620), a push plate (630) and a trigger plate (640); the pressure plate (620) is located on the movement path of the trip button (400), and the side of the pressure plate (620) facing the trip button (400) is the pressing surface (621); one side of the push plate (630) is the striking surface (631) located on the movement path of the striking rod (110), and the other side of the push plate (630) is the pushing surface (632); the traction rod (200) extends in a direction close to the push plate (600) and is provided with a first transmission arm (210) for resisting and pushing the trigger surface (641); the trigger plate (640) has the trigger surface (641) located on the movement path of the first transmission arm (210).

4. The magnetic trip protection structure according to claim 3, characterized in that: The rotating portion (610) of the push plate (600) is rotatably mounted on the housing (120) of the magnetic flux release (100) via a push plate rotating shaft (700), and a push plate spring (800) is provided between the push plate (600) and the housing (120) to provide elastic restoring force for the push plate (600).

5. The magnetic trip protection structure according to claim 4, characterized in that: The push plate (600) is provided with a first limiting arm (642) and a second limiting arm (643) respectively extending along the rotation axis direction of the push plate (600) for limiting the rotation stroke of the push plate (600), and the housing (120) is provided with a first stop surface (123) corresponding to the first limiting arm (642) and a second stop surface (124) corresponding to the second limiting arm (643).

6. The magnetic trip protection structure according to claim 4, characterized in that: The housing (120) includes two mounting plates (121) spaced apart along the rotation axis direction of the push plate (600), and the mounting plates (121) are provided with a first rotation hole (122) for rotationally cooperating with the push plate shaft (700). The rotating portion (610) includes two rotating plates (611) located between the two mounting plates (121) and spaced apart along the rotation axis direction of the push plate (600), and the rotating plates (611) are provided with a second rotation hole (612) for rotationally cooperating with the push plate shaft (700), and a rotating boss (613) for contacting the mounting plate (121) is provided between at least one rotating plate (611) and the mounting plate (121) on the same side, and a retaining spring (900) is provided on the side of the mounting plate (121) facing away from the rotation boss (613) and is sleeved on the push plate shaft (700).

7. The magnetic trip protection structure according to claim 6, characterized in that: The push plate (630) is an L-shaped plate. The push plate (630) is provided with a striking surface (631) and a pushing surface (632). One end of the push plate (630) is connected to the pressure plate (620) on the side close to the trip button (400), and the other end of the push plate (630) is connected to a rotating plate (611) on the side away from the trip button (400). The trigger plate (640) is a U-shaped plate. The opening of the trigger plate (640) is arranged along the moving direction of the striking rod (110) and facing away from the magnetic flux release (100). The inner side of the bottom edge of the trigger plate (640) is the trigger surface (641). The two side edges of the trigger plate (640) are respectively connected to the side of the two rotating plates (611) away from the push plate (630).

8. The magnetic trip protection structure according to claim 3, characterized in that: The pressure plate (620) and the trip button (400) are arranged at an oblique angle.

9. The magnetic trip protection structure according to claim 1, characterized in that: The magnetic flux release (100) further comprises a static iron core (130), a guide tube (140), a coil (150), a frame (160), a moving iron core (170), and a moving iron core spring (180) installed in the housing (120); the coil (150) is sleeved on the frame (160); the guide tube (140) is arranged in an axial hole of the frame (160); the static iron core (130) is fixed in one end of the guide tube (140); the moving iron core (170) is fixed in an axial hole of the frame (160); and the moving iron core (180) is fixed in an axial hole of the frame (160). The core (170) is slidably arranged in the other end of the guide tube (140) and is arranged opposite to the static iron core (130). One end of the striking rod (110) is connected to the moving iron core (170), and the other end passes through the static iron core (130) and the housing (120) in sequence and is arranged corresponding to the striking surface (631) of the push plate (600). The moving iron core spring (180) is sleeved on the striking rod (110) and connected between the moving iron core (170) and the static iron core (130).

10. The magnetic trip protection structure according to claim 1, characterized in that: The backup release (300) comprises a bracket (310), a yoke (320), an armature (330), and an armature spring (340) for providing elastic reset force for the armature (330); the yoke (320) is fixed to the bracket (310); the armature (330) is rotatably mounted on the bracket (310) via an armature rotating shaft (350); and the armature (330) and the yoke (320) are arranged opposite to each other with a distance; the traction rod (200) is provided with a second transmission arm (220) extending in a direction close to the armature (330); and the armature (330) is provided with a trigger arm (331) for pushing the second transmission arm (220).

11. The magnetic trip protection structure according to claim 9, characterized in that: The magnetic flux release (100) further comprises an isolation ring (190), which is sleeved on one end of the moving iron core (170) away from the static iron core (130) and is located between the moving iron core (170) and the housing (120).

12. The magnetic trip protection structure according to claim 11, characterized in that: The guide tube (140) is a copper tube, and / or the isolation ring (190) is a copper ring.

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