Manual closing structure of magnetic control type circuit breaker and magnetic control type circuit breaker

Abstract

A manual closing structure of a magnetic control type circuit breaker comprises a support. The electromagnetic mechanism comprises a driving rod; the manual closing assembly comprises an operation shaft, a push rod and a sliding part, the sliding part is arranged on the support in a sliding mode in the closing direction and can be switched from the first position to the second position, the sliding part and the driving rod are arranged correspondingly, the operation shaft rotates around a third rotation center c, the push rod is connected with the operation shaft, and the push rod can rotate along with the operation shaft; and the push rod drives the sliding piece to push the driving rod to move towards the closing direction. A magnetic control type circuit breaker comprises a rotating shaft system and a manual closing structure. The utility model relates to the field of low-voltage electric appliances, in particular to a manual switching-on structure of a magnetic control type circuit breaker and the magnetic control type circuit breaker, switching-on of the circuit breaker can be realized only by rotating an operating shaft without additionally providing an external power supply, the operating shaft and a sliding piece are in transmission through a push rod, rotation is converted into linear sliding, and the linear sliding is output to a driving rod. Manual rotation operation is facilitated, and reliable and stable manual closing can be realized.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a manual closing structure of a magnetically controlled circuit breaker and the magnetically controlled circuit breaker. Background Art

[0002] Products that use permanent magnet control or coil control for intelligent molded case circuit breakers are new reclosing products launched in the past two to three years. These products have the characteristics of fast closing and opening speeds and long mechanical life, but they cannot be manually closed. When problems arise during on-site use of the product or when the product is being installed and debugged on-site, an external power supply must be provided on-site for the product to be able to close. This brings great inconvenience to on-site use and poses a safety hazard to users. Currently, the power grid industry requires that this type of product must have a manual closing function. Utility Model Content

[0003] The purpose of the present utility model is to overcome at least one defect of the prior art and to provide a manual closing structure of a magnetically controlled circuit breaker and a magnetically controlled circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Manual closing structure of magnetically controlled circuit breaker, including

[0006] Bracket;

[0007] The electromagnetic mechanism includes a drive rod, which can move in the closing direction to close the circuit breaker and can move in the opening direction to open the circuit breaker;

[0008] A manual closing assembly includes an operating shaft, a push rod and a sliding member. The sliding member is slidably arranged on a bracket along the closing direction and can be switched from a first position to a second position. The sliding member is correspondingly arranged to the driving rod. The operating shaft is rotated around a third rotation center C. The push rod is connected to the operating shaft and can rotate with the operating shaft, so that the push rod drives the sliding member to push the driving rod in the closing direction.

[0009] Optionally, the push rod includes a push rod linkage portion connected to the operating shaft, the push rod linkage portion is extended with at least one pushing arm, the sliding member is provided with a driven shaft, the driven shaft is located on the movement path of the pushing arm when it is in the first position, the pushing arm is used to push the driven shaft to slide to the second position, and when the driven shaft is in the second position, the pushing arm is not on the path of the driven shaft moving to the first position.

[0010] Optionally, the manual closing assembly further includes a reset spring, and the reset spring is used to drive the sliding member to reset from the second position to the first position along the opening direction.

[0011] Optionally, the push rod linkage part is respectively extended with two push arms, and the two push arms are centrally symmetrically arranged with the third rotation center c as the center of symmetry.

[0012] Optionally, the push rod has a linkage hole, one end of the operating shaft passes through the linkage hole, and a limit pin is passed through the part of the one end of the operating shaft that passes through the linkage hole, the other end of the operating shaft extends into the operating hole of the circuit breaker housing, and the circuit breaker housing extends toward the push rod with a limit protrusion, and the upper limit of the push rod in the direction of the third rotation center c is located between the limit pin and the limit protrusion.

[0013] Optionally, the sliding member includes a sliding plate slidably mounted on the bracket, the sliding plate is arranged perpendicular to the third rotation center c, and the bracket includes a guide plate, and the guide plate and the sliding plate are spaced apart along the direction of the third rotation center c.

[0014] Optionally, at least one guide shaft is provided on the sliding plate of the sliding member, and a guide hole corresponding to the guide shaft is provided on the guide plate of the bracket, and the guide shaft is slidably arranged in the guide hole along the movement direction of the sliding member;

[0015] And / or, the movement direction of the driving rod is arranged perpendicular to the axial direction of the driving rod, and the sliding plate of the sliding member is extended with a driving arm, and the driving arm is against the radial side of the driving rod facing the opening direction.

[0016] A magnetically controlled circuit breaker comprises a rotating shaft system, wherein the rotating shaft system is provided with at least one moving contact, and further comprises a manual closing structure of any magnetically controlled circuit breaker described in any one of the preceding claims, wherein a driving rod of the manual closing structure is used to drive the moving contact of the rotating shaft system to contact or separate with the corresponding static contact to conduct and disconnect the main circuit of the circuit breaker.

[0017] Optionally, a protection mechanism and a self-locking device are further included, and the electromagnetic mechanism further includes a limit rod and a movable iron core, the limit rod is fixedly connected to the movable iron core, and one end of the limit rod close to the movable iron core is fixedly connected to the driving rod;

[0018] The self-locking device includes a fixed frame, a locking assembly, and a trip assembly. The locking assembly includes a roller disposed on the fixed frame, and the roller can perform circular motion around a first rotation center a to switch between a closed position and an open position. The trip assembly includes a push rod and a push rod spring. The push rod is rotatably disposed on the fixed frame around a second rotation center b.

[0019] The push rod spring is used to drive the push rod to push the roller to the closing position, so that the roller and the limit rod are locked together to prevent the moving iron core from moving in the opening direction; the push rod is used to rotate under external force to release the lock on the roller, so that the roller and the limit rod are released, so that the moving iron core can move in the opening direction;

[0020] The protection mechanism is used to drive the self-locking device to release, so that the driving rod of the electromagnetic mechanism drives the moving contact to disconnect the main circuit.

[0021] Optionally, the limit rod is provided with a buckle surface and a limit surface, the buckle surface is used to buckle with the roller located in the closing position, and is used to push the roller to the opening position when the limit rod moves in the opening direction with the moving iron core, so that the limit surface can lock the roller in the opening position, so that the roller keeps the push rod spring in the energy storage state through the push rod;

[0022] The buckle surface is perpendicular to the movement direction of the limit rod, and the buckle surface is vertically connected to the limit surface. The roller located in the closing position is blocked on the path of the buckle surface moving in the opening direction; in the process of the limit rod moving in the opening direction with the moving iron core, the buckle surface of the limit rod pushes the roller to roll onto the limit surface.

[0023] The manual closing structure of the magnetically controlled circuit breaker and the magnetically controlled circuit breaker of the present invention have a manual closing function. Regardless of whether the main circuit of the circuit breaker is energized, no external power supply is required. The circuit breaker can be closed by simply rotating the operating shaft to rotate the push rod to push the sliding member to slide in the closing direction, so that the sliding member pushes the driving rod to move in the closing direction, which is more convenient for users to use on site. The operating shaft and the sliding member are driven by the push rod, and the rotation is converted into a linear sliding output to the driving rod, which is convenient for manual rotation operation and can ensure reliable and stable manual closing.

[0024] In addition, a push arm is used to push the driven shaft to realize the drive between the push rod and the sliding part. The structure is simple and the drive is stable and reliable. The push arm will not interfere with the resetting of the driven shaft, so that the push rod can perform manual closing operation in one direction without manual resetting or setting of resetting parts.

[0025] In addition, the push rod spring drives the push rod to push the roller and the limit rod to achieve the closing lock. The push rod releases the lock on the roller to release the buckle between the roller and the limit rod to achieve the tripping and opening. This ensures that the circuit breaker can be closed quickly and reliably, and opened quickly and reliably with a smaller tripping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the magnetically controlled circuit breaker of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the upper cover, operating shaft and push rod of the utility model;

[0028] Figure 3 This is a structural diagram of a hidden upper cover of a magnetically controlled circuit breaker of the present invention;

[0029] Figure 4This is a structural diagram of the manual closing structure, self-locking device and electromagnetic mechanism of the utility model;

[0030] Figure 5 It is a cross-sectional view of the manual closing structure, self-locking device and electromagnetic mechanism of the utility model;

[0031] Figure 6 It is a structural diagram of the sliding plate of the utility model;

[0032] Figure 7 It is a three-dimensional diagram of the self-locking device and the rotating shaft system of the utility model;

[0033] Figure 8 This is a structural diagram of the self-locking device and the rotating shaft system when the utility model is closed;

[0034] Figure 9 This is a structural diagram of the self-locking device and the rotating shaft system when the utility model is opened;

[0035] Figure 10 This is a structural diagram of the self-locking device and the rotating shaft system during the closing process of the utility model;

[0036] Figure 11 It is a structural diagram of the self-locking device of the utility model;

[0037] Figure 12 It is a structural diagram of the limit rod of the utility model;

[0038] Figure 13 It is a structural diagram of the mounting plate of the utility model;

[0039] Figure 14 It is a cross-sectional view of the electromagnetic mechanism of the utility model;

[0040] Figure 15 It is a structural schematic diagram of the unbuttoning component of the utility model.

[0041] First rotation center a; second rotation center b; third rotation center c; fixing frame 100; mounting plate 110; movable hole 111; stop side wall 112; hinge axis hole 113; stop arm 114; first hanging hole 115; electromagnetic mechanism 200; limiting rod 210; buckle surface 211; limiting surface 212; through hole 213; moving iron core 220; moving iron core spring 221; sliding hole 222; driving rod 230; striking rod 240; striking elbow 241; connecting portion 242; fixing portion 243; electromagnetic mechanism housing 250; static iron core 260; sliding shaft 261; guide tube 270; skeleton 280; coil 290; locking assembly 300; roller 310; linkage shaft 320; connecting rod 330; hinge axis 340; tripping assembly 400; ejector rod 410; ejector rod rotating portion 411; trigger arm 41 2; trip arm 413; first abutment surface 4131; second abutment surface 4132; striking surface 4133; ejector spring 420; ejector shaft 430; limiting boss 431; bushing 440; shaft system 500; moving contact 510; support member 520; transmission arm 521; transmission connecting rod 530; static contact 600; bracket 700; side plate 710; guide plate 720; guide hole 721; hand Dynamic closing assembly 800; operating shaft 810; push rod 820; push rod linkage portion 821; push arm 822; sliding member 830; driven shaft 831; guide shaft 832; sliding plate 833; driving arm 834; second hanging hole 835; return spring 840; limit pin 850; circuit breaker housing 900; base 910; base 920; upper cover 930; operating hole 931; limit protrusion 932. DETAILED DESCRIPTION

[0042] The following embodiments are combined with the accompanying drawings to further illustrate the manual closing structure of the magnetically controlled circuit breaker and the specific implementation of the magnetically controlled circuit breaker of the present invention. The manual closing structure of the magnetically controlled circuit breaker and the magnetically controlled circuit breaker of the present invention are not limited to the description of the following embodiments.

[0043] like Figure 1 、 Figure 2 and Figure 7As shown, the magnetically controlled circuit breaker of this embodiment includes a circuit breaker housing 900, a rotating shaft system 500 mounted within the circuit breaker housing 900, a protective mechanism, a self-locking device, and a manual closing structure for the magnetically controlled circuit breaker. The circuit breaker housing 900 includes a base 910, a pedestal 920, and an upper cover 930 stacked and fixed in sequence. The rotating shaft system 500 is provided with at least one movable contact 510. The manual closing structure of the magnetically controlled circuit breaker includes a bracket 700, an electromagnetic mechanism 200, and a manual closing assembly 800. The electromagnetic mechanism 200 is used to drive the movable contact 510 of the rotating shaft system 500 to contact or separate with the corresponding static contact 600 to connect and disconnect the main circuit of the circuit breaker, thereby closing and opening the circuit breaker. The protective mechanism is used to drive the self-locking device to release when a fault occurs in the main circuit (such as overcurrent, overload, overvoltage, undervoltage, leakage, short circuit, etc.), causing the electromagnetic mechanism 200 to drive the movable contact to disconnect the main circuit to achieve the protection function. It should be noted that the protection mechanism is an existing technology and can be one or more of a trip button for manual tripping, a flux release for magnetic flux tripping, and a backup release for backup electromagnet tripping.

[0044] like Figure 2 、 Figure 4 and Figure 5 As shown, the electromagnetic mechanism 200 includes a drive rod 230, which can move in the closing direction to close the circuit breaker and can move in the opening direction to open the circuit breaker; the manual closing assembly 800 includes an operating shaft 810, a push rod 820 and a sliding member 830, and the sliding member 830 is slidably arranged on the bracket 700 along the closing direction and can be switched from a first position to a second position, and the sliding member 830 is arranged corresponding to the drive rod 230, and the operating shaft 810 is rotated around the third rotation center c, and the push rod 820 is connected to the operating shaft 810, and the push rod 820 can rotate with the operating shaft 810, so that the push rod 820 drives the sliding member 830 to push the drive rod 230 to move in the closing direction. The manual closing structure of the magnetically controlled circuit breaker and the magnetically controlled circuit breaker of this embodiment have a manual closing function. Regardless of whether the main circuit of the circuit breaker is powered, no external power supply is required. The operating shaft 810 only needs to be rotated to rotate the push rod 820 to push the sliding member 830 to slide in the closing direction. The sliding member 830 then pushes the driving rod 230 to move in the closing direction to close the circuit breaker, which is more convenient for users to use on site. The operating shaft 810 and the sliding member 830 are transmitted through the push rod 820, and the rotation is converted into a linear sliding output to the driving rod 230, which not only facilitates manual rotation operation but also ensures reliable and stable manual closing.

[0045] like Figure 3As shown, the push rod 820 of this embodiment includes a push rod linkage portion 821 connected to the operating shaft 810. The push rod linkage portion 821 is extended with at least one push arm 822. The slide member 830 is provided with a driven shaft 831. When the driven shaft 831 is in the first position, it is located in the motion path of the push arm 822. The push arm 822 is used to push the driven shaft 831 to slide to the second position. When the driven shaft 831 is in the second position, the push arm 822 is not in the motion path of the driven shaft 831 to the first position. The use of the push arm 822 to push the driven shaft 831 to achieve drive between the push rod 820 and the slide member 830 has a simple structure and stable and reliable drive. The push arm 822 does not interfere with the reset of the driven shaft 831, allowing the push rod 820 to perform manual closing operation in one direction without the need for manual reset or the provision of a reset member.

[0046] Preferably, the push rod linkage portion 821 is provided with two push arms 822, each of which is centrally symmetrically arranged about the third rotation center C. The centrally symmetrical arrangement of the two push arms 822 reduces the angle required to manually rotate the operating shaft 810 during repeated manual closing operations, simplifying the operation and saving time and effort.

[0047] like Figure 5 As shown, the manual closing assembly 800 of this embodiment further includes a reset spring 840, which is used to drive the sliding member 830 to reset from the second position to the first position along the opening direction. The reset spring 840 of this embodiment is used to drive the sliding member 830 to reset to make room for the driving rod 230 to move in the opening direction, without adding additional burden to the circuit breaker opening. Of course, as other embodiments, the reset spring 840 may not be provided, and when the driving rod 230 moves in the opening direction, it pushes the sliding member 830 to reset to the first position. Specifically, the reset spring 840 is provided below the fixing bracket 100, with one end hooked in the first hanging hole 115 of the fixing bracket 100, and the other end hooked in the second hanging hole 835 of the sliding member 830.

[0048] like Figure 2 and Figure 3As shown, the push rod linkage portion 821 is a circular ring structure with an axially arranged linkage hole. One end of the operating shaft 810 passes through the linkage hole, and a stop pin 850 is inserted into the portion of the operating shaft 810 that protrudes from the linkage hole. The other end of the operating shaft 810 extends into the operating hole 931 of the upper cover 930 of the circuit breaker housing 900. The upper cover 930 of the circuit breaker housing 900 is provided with a stop protrusion 932 extending toward the push rod 820. The upper limit of the push rod 820 in the direction of the third rotation center c is located between the stop pin 850 and the stop protrusion 932, preventing the push rod 820 from axially deviating from the operating shaft 810 and improving the rotational synchronization between the push rod 820 and the operating shaft 810. The third rotation center c is the axis of the operating shaft 810. The stop protrusion 932 is preferably an annular boss structure arranged around the operating hole 931. Preferably, the operating shaft 810 is a hexagonal screw structure, and the operating shaft 810 can be rotated using a hexagonal wrench. In this embodiment, the push rod 820 and the operating shaft 810 are provided separately, and the push rod 820 and the operating shaft 810 rotate synchronously by the operating shaft 810 passing through a linkage hole provided axially in the push rod linkage portion 821. Of course, in other embodiments, the push rod linkage portion 821 may not be provided with a linkage hole, and the push rod 820 may be directly integrally formed with the operating shaft 810.

[0049] like Figure 5 and Figure 6 As shown, the sliding member 830 of this embodiment includes a sliding plate 833 slidably mounted on the bracket 700. The sliding plate 833 is perpendicular to the third rotation center c. The bracket 700 includes two side plates 710 disposed on either side of the sliding plate 833. The two side plates 710 are spaced apart, with one side plate 710 extending toward the other side plate 710 to form a guide plate 720. The other side plate 710 is riveted to the guide plate 720. The guide plates 720 and the sliding plate 833 are spaced apart along the direction of the third rotation center c. In this embodiment, the guide plate 720 is integrally formed with one side plate 710 and fixed to the other side plate 710, simplifying the structure, facilitating installation, and improving the robustness of the bracket 700. Of course, in other embodiments, the guide plate 720 can also be a separate plate fixed to a suitable location within the circuit breaker housing 900 (e.g., a side plate 710, upper cover 930, etc.).

[0050] like Figure 4 As shown, at least one guide shaft 832 is provided on the sliding plate 833 of the sliding member 830, and a guide hole 721 corresponding to the guide shaft 832 is provided on the guide plate 720 of the bracket 700. The guide shaft 832 is slidably disposed in the guide hole 721 along the movement direction of the sliding member 830. The guide shaft 832 slidably engages with the guide hole 721 to guide the sliding of the sliding member 830.

[0051] like Figure 5 and Figure 6 As shown, the movement direction of the drive rod 230 is perpendicular to the axial direction of the drive rod 230. A drive arm 834 extends from the sliding plate 833 of the slider 830. The drive arm 834 abuts the radial side of the drive rod 230 facing the opening direction. The drive structure between the slider 830 and the drive rod 230 is simple and can be driven stably in the same direction, improving the reliability of manual closing.

[0052] For example, Figure 4 and Figure 5 As shown, the guide plate 720 and the sliding plate 833 are arranged parallel to each other and perpendicular to the side plate 710. The side plates 710 are spaced apart in the axial direction of the drive rod 230. The side plate 710 is provided with a first through-hole for the drive rod 230 to pass through. The push rod 820 is arranged close to the guide plate 720 and away from the sliding plate 833. The guide shaft 832 and the driven shaft 831 are both arranged on the side of the sliding plate 833 facing the guide plate 720. The driven shaft 831 passes through a guide hole 721 in the guide plate 720 and is arranged corresponding to the push arm 822 of the push rod 820. The sliding plate 833 is L-shaped, with two guide shafts 832 disposed at one end of the sliding plate 833, a driven shaft 831 disposed in the middle of the sliding plate 833, and a guide shaft 832 disposed at the other end of the sliding plate 833. A line connecting the centers of the driven shaft 831 and the three guide shafts 832 forms an L-shaped line with the center of the driven shaft 831 as the intersection point. Correspondingly, the guide plate 720 is provided with three guide holes 721 corresponding to the three guide shafts 832. In this embodiment, the guide shafts 832 and driven shaft 831 are separate from the sliding plate 833 and are mounted on the sliding plate 833 via shaft holes provided in the sliding plate 833, simplifying the structure of the sliding plate 833 and facilitating manufacturing. Of course, the guide shafts 832 and driven shaft 831 can also be cylindrical structures integrally formed on the sliding plate 833.

[0053] like Figures 8-10 As shown, the self-locking device includes a fixed frame 100, a locking assembly 300 and a tripping assembly 400, the electromagnetic mechanism 200 includes a limit rod 210 and a moving iron core 220, and the limit rod 210 is fixedly connected to the moving iron core 220; the locking assembly 300 includes a roller 310 arranged on the fixed frame 100, and the roller 310 can make a circular motion around a first rotation center a to switch between a closed position and an open position; the tripping assembly 400 includes a push rod 410 and a push rod spring 420, and the push rod 410 is rotatably arranged on the fixed frame 100 around a second rotation center b.

[0054] The push rod spring 420 is used to drive the push rod 410 to push the roller 310 to the closed position, so that the roller 310 engages with the limit rod 210 to prevent the movable iron core 220 from moving in the opening direction. The push rod 410 is used to rotate under external force to release the lock on the roller 310, so that the roller 310 and the limit rod 210 are released, allowing the movable iron core 220 to move in the opening direction. The push rod spring 420 drives the push rod 410 to push the roller 310 and the limit rod 210 to achieve the closing lock. The push rod 410 releases the lock on the roller 310, so that the roller 310 and the limit rod 210 are released to achieve the tripping and opening, ensuring that the circuit breaker can be closed quickly and reliably, and opened quickly and reliably with a small tripping force.

[0055] like Figure 7 and Figure 11 As shown, the driving structure between the electromagnetic mechanism 200 and the rotating shaft system 500 of this embodiment has multiple implementation methods. One optional method is that the electromagnetic mechanism 200 also includes a driving rod 230, and the end of the limiting rod 210 close to the moving iron core 220 is fixedly connected to the driving rod 230, and the driving rod 230 passes through the through hole 213 of the limiting rod 210 and is arranged perpendicular to the limiting rod 210; the rotating shaft system 500 also includes a support member 520 and a transmission connecting rod 530, the moving contact 510 is arranged on the support member 520, the support member 520 is rotatably arranged, and the support member 520 is extended with a transmission arm 521 for being hinged to one end of the transmission connecting rod 530, and the other end of the transmission connecting rod 530 is hinged to the driving rod 230. When the drive rod 230 moves in the closing direction, it drives the transmission link 530 of the rotating shaft system 500, causing the transmission link 530 to rotate the support member 520, thereby causing the movable contact 510 to rotate along with the support member 520 and contact the corresponding static contact 600, thereby closing the circuit breaker. When the drive rod 230 moves in the opening direction, it drives the transmission link 530 of the rotating shaft system 500, causing the transmission link 530 to rotate the support member 520, thereby causing the movable contact 510 to rotate along with the support member 520 and separate from the corresponding static contact 600, thereby opening the circuit breaker. Of course, other transmission structures can also be provided to drive the support member 520 to rotate.

[0056] like Figure 10As shown, the electromagnetic mechanism 200 of this embodiment further includes a striking rod 240. The end of the limiting rod 210 away from the movable iron core 220 is fixedly connected to the striking rod 240. The striking rod 240 is used to drive the push rod 410 to push the roller 310 toward the closed position when the limiting rod 210 moves in the closing direction with the movable iron core 220. When the switch is closed, the push rod 410 can rotate under the joint drive of the push rod spring 420 and the striking rod 240. This avoids the problem of the push rod 410 being unable to rotate or rotating incompletely due to deformation and failure of the push rod spring 420 or insufficient elasticity, thereby improving the reliability of the closing lock.

[0057] For example, Figure 9 and Figure 10 As shown, the striking rod 240 of this embodiment is an integrally formed structure, including an L-shaped connecting portion 242 and a U-shaped fixing portion 243. The two sides of the fixing portion 243 clamp the end of the limiting rod 210 away from the movable iron core 220 and are fixed together by rivets. The opening of the connecting portion 242 is arranged facing the limiting rod 210. One end of the connecting portion 242 is connected to the bottom edge of the fixing portion 243, and the other end is bent toward the limiting rod 210 to form a striking elbow 241 for pushing against the ejector rod 410. The overall structure is simple and easy to connect. The L-shaped connecting portion 242 avoids interference with other parts during movement, mainly used to avoid the movement trajectory of the roller 310, and also gives the striking elbow 241 a certain degree of elasticity, which plays a protective role. Of course, the striking rod 240 can also adopt other structures. For example, the fixing portion 243 can be non-U-shaped.

[0058] like Figure 11 and Figure 12 As shown, the cooperation structure between the limit rod 210 and the roller 310 of this embodiment, the limit rod 210 is provided with a buckle surface 211 and a limit surface 212, the buckle surface 211 is used to buckle with the roller 310 located in the closing position, and is used to push the roller 310 to move to the opening position when the limit rod 210 moves in the opening direction with the moving iron core 220, so that the limit surface 212 can lock the roller 310 in the opening position, so that the roller 310 keeps the top rod spring 420 in the energy storage state through the top rod 410.

[0059] Preferably, the buckle surface 211 is perpendicular to the direction of movement of the limiting rod 210, and the buckle surface 211 is perpendicularly connected to the limiting surface 212. The roller 310 in the closing position blocks the path of the buckle surface 211 moving in the opening direction. When the limiting rod 210 moves in the opening direction with the moving iron core 220, the buckle surface 211 of the limiting rod 210 pushes the roller 310 to roll onto the limiting surface 212. The roller 310 and the buckle surface 211 are buckled together to achieve a stable locking state, preventing the buckle from slipping. Moreover, when the self-locking device is released, the roller 310 rolls and makes a circular motion on the buckle surface 211 to gradually separate from the buckle surface 211 until the roller 310 automatically switches to rolling on the limiting surface 212. The movement is smooth and continuous, preventing the device from being stuck.

[0060] like Figure 5 、 Figure 7 and Figure 12 As shown, the first rotation center a and the second rotation center b are parallel and perpendicular to the movement direction of the limiting rod 210. The fixing frame 100 includes two mounting plates 110 spaced apart along the first rotation center a. The two side plates 710 are perpendicularly arranged on either side of the two mounting plates 110. The mounting plates 110 and the side plates 710 are riveted to each other. An installation space is defined between the two mounting plates 110. The end of the limiting rod 210 away from the movable iron core 220 extends into the installation space. The roller 310 and the push rod 410 are respectively installed in the installation space. The first rotation center a of the roller 310 is located on the path of the limiting rod 210 moving in the opening direction, and the second rotation center b of the push rod 410 is located to one side of the limiting rod 210. The compact structure shortens the movement path of the roller 310, allowing for rapid closing and unlocking, further improving the closing and opening speeds.

[0061] like Figure 11 and Figure 13 As shown, the locking assembly 300 of this embodiment also includes a linkage shaft 320, two connecting rods 330 and two hinge shafts 340. The mounting plate 110 is provided with a movable hole 111 corresponding to the linkage shaft 320 and a hinge shaft hole 113 corresponding to the hinge shaft 340. The roller 310 is sleeved on the middle part of the linkage shaft 320. The two ends of the linkage shaft 320 respectively pass through the movable holes 111 of the two mounting plates 110 and are hinged to one end of the two connecting rods 330. The other ends of the two connecting rods 330 are respectively hinged to the outer sides of the two mounting plates 110 through two hinge shafts 340. The two hinge shafts 340 are coaxially arranged, and the first rotation center a is the axis center of the hinge shaft 340.

[0062] Preferably, the movable hole 111 has a stop side wall 112, which abuts the linkage shaft 320 when the roller 310 is in the closing position. The linkage shaft 320 cooperates with the stop side wall 112 to keep the roller 310 stably in the closing position, thereby improving the stability and reliability of the closing lock of the device.

[0063] like Figure 11 and Figure 13 As shown, the push rod 410 of this embodiment is an integrally formed structure, including a push rod rotating part 411, the push rod rotating part 411 is rotatably arranged on the fixed frame 100 through the push rod rotating shaft 430, the push rod rotating shaft 430 is installed on the fixed frame 100, the push rod rotating part 411 is provided with a first shaft hole that is rotatably matched with the push rod rotating shaft 430, the push rod rotating part 411 is sleeved on the push rod rotating shaft 430 through the first shaft hole, the second rotation center b is the axis of the push rod rotating shaft 430, the push rod rotating part 411 is radially extended with a trigger arm 412 for receiving external force and a tripping arm 413 that cooperates with the roller 310, the trigger arm 412 extends out of the installation space through the second through hole on the side plate 710 when the roller 310 is in the closed position, and is arranged corresponding to the protection mechanism. Figures 8-10 As shown, the tripping arm 413 has a first abutting surface 4131, a second abutting surface 4132 and a striking surface 4133 which are connected in sequence. The first abutting surface 4131 is used to abut against the roller 310 located in the open position, the second abutting surface 4132 is used to abut against the roller 310 located in the closed position, and the striking surface 4133 is used to cooperate with the striking elbow 241 of the striking rod 240.

[0064] For example, Figure 11 and Figure 15 As shown, the unfastening assembly 400 of this embodiment also includes a sleeve 440, which is provided with a second shaft hole that cooperates with the push rod shaft 430. The sleeve 440 is sleeved on the push rod shaft 430 through the second shaft hole. The radial protrusion of the push rod shaft 430 forms a limiting boss 431, and the push rod rotating part 411 is located between the limiting boss 431 and the sleeve 440 at the upper limit in the direction of the second rotation center b.

[0065] The ejector spring 420 of this embodiment is used to reset the ejector 410, thereby driving the ejector 410 to push the roller 310 to the closed position. The structure and installation position of the ejector spring 420 are not limited. For example, the ejector spring 420 is a torsion spring, which is sleeved on the shaft sleeve 440. One end of the ejector spring 420 abuts against the ejector rotating portion 411, and the other end abuts against the side plate 710.

[0066] Preferably, a stop arm 114 is provided on the fixing frame 100. When the roller 310 is in the closed position, the stop arm 114 abuts against the first abutment surface 4131 of the trip arm 413. The trip arm 413 of the push rod 410 cooperates with the stop arm 114 to limit the rotational travel of the push rod 410, thereby stably maintaining the roller 310 in the closed position and improving the stability and reliability of the device's closing lock.

[0067] like Figure 8 As shown, the electromagnetic mechanism 200 of this embodiment further includes a moving iron core spring 221 . When the roller 310 and the limiting rod 210 are released from the buckle, the moving iron core 220 can move in the opening direction driven by the moving iron core spring 221 .

[0068] like Figure 14 As shown, the electromagnetic mechanism 200 of this embodiment has multiple implementation methods. One optional method is that the electromagnetic mechanism 200 also includes a static iron core 260, a sliding shaft 261, a guide tube 270, a skeleton 280 and a coil 290 installed in the electromagnetic mechanism housing 250, and the electromagnetic mechanism 200 and the fixing frame 100 are arranged between the two side plates 710 along the opening direction, and the electromagnetic mechanism housing 250 of the electromagnetic mechanism 200 is riveted between the two side plates 710. The coil 290 is sleeved on the skeleton 280, the guide tube 270 is arranged in the axial hole of the skeleton 280, the static iron core 260 is fixed in one end of the guide tube 270, the moving iron core 220 is slidably arranged in the other end of the guide tube 270 and is arranged opposite to the static iron core 260, and the axial direction of the moving iron core 220 is provided with a sliding hole 222 that slides with the sliding shaft 261, one end of the sliding shaft 261 is fixedly connected to the static iron core 260, and the other end is inserted into the sliding hole 222 of the moving iron core 220, the end of the moving iron core 220 away from the static iron core 260 is fixedly connected to one end of the limiting rod 210, the other end of the limiting rod 210 passes through the electromagnetic mechanism housing 250 and is arranged corresponding to the roller 310, the moving iron core spring 221 is sleeved on the sliding shaft 261 and connected between the moving iron core 220 and the static iron core 260. When the coil 290 is energized, the moving iron core 220 is attracted to the static iron core 260 by the electromagnetic force, and the limiting rod 210 and the driving rod 230 move along with the moving iron core 220. Of course, the electromagnetic mechanism 200 can also adopt other existing structures.

[0069] The specific operation process of the magnetically controlled circuit breaker in this embodiment is as follows: Figure 9 As shown, when the roller 310 is in the opening position, the push rod 410 is subjected to the counterclockwise torque of the push rod spring 420 (that is, the push rod spring 420 is in the energy storage state), the first abutment surface 4131 of the push rod 410 contacts the roller 310, and the roller 310 contacts the limiting surface 212 of the limiting rod 210.

[0070] When closing the circuit breaker automatically, Figure 10 As shown, when the movable iron core 220 moves upward (in the closing direction) under the action of the electromagnetic force, the limiting rod 210 and the driving rod 230 move in the closing direction along with the movable iron core 220, and the roller 310 passes over the limiting surface 212. At this time, the push rod spring 420 releases energy to drive the push rod 410 to rotate clockwise until it is limited by the first abutting surface 4131 and the stop arm 114. At the same time, the push rod 410 pushes the roller 310 to perform a clockwise circular motion through the second abutting surface 4132 until the linkage shaft 320 is limited by the stop side wall 112 of the fixing frame 100 (that is, the roller 310 is in the closing position); Figure 8 As shown, at this time, the electromagnetic force on the moving iron core 220 disappears, and the moving iron core spring 221 exerts a downward reaction force, causing the buckle surface 211 of the limit rod 210 to contact the roller 310. The buckle surface 211 forms a counterclockwise torque on the roller 310, and at the same time, the roller 310 is supported by the push rod 410, forming a locked stable state.

[0071] The difference between manual closing and automatic closing is that there is no need to energize the coil 290 to provide electromagnetic force to the moving iron core 220. Instead, the operating shaft 810 is manually rotated, and the push rod 820 rotates with the operating shaft 810, so that the push arm 822 of the push rod 820 pushes the driven shaft 831 of the sliding member 830, so that the sliding member 830 slides to the second position along the closing direction, so that the driving arm 834 of the sliding member 830 pushes the driving rod 230 to move in the closing direction, so that the limit rod 210 and the moving iron core 220 move in the closing direction with the driving rod 230.

[0072] When opening the gate, the top rod 410 moves clockwise under the impact of the protection mechanism, and the self-locking device is released when the second abutting surface 4132 of the top rod 410 is separated from the roller 310. The moving iron core 220 moves downward (in the opening direction) driven by the moving iron core spring 221, so that the limiting rod 210 pushes the roller 310 to move counterclockwise quickly through the buckle surface 211 until the roller 310 contacts the first abutting surface 4131 of the top rod 410 and the limiting surface 212 of the limiting rod 210 (that is, the roller 310 is in the opening position).

[0073] 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.

[0074] 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. The manual closing structure of the magnetically controlled circuit breaker is characterized by: include Bracket (700); The electromagnetic mechanism (200) comprises a driving rod (230), wherein the driving rod (230) can move in a closing direction to close the circuit breaker, and can move in an opening direction to open the circuit breaker; A manual closing assembly (800) comprises an operating shaft (810), a push rod (820) and a sliding member (830). The sliding member (830) is slidably arranged on a bracket (700) along a closing direction and can be switched from a first position to a second position. The sliding member (830) is correspondingly arranged with a driving rod (230). The operating shaft (810) is rotatably arranged around a third rotation center c. The push rod (820) is connected to the operating shaft (810). The push rod (820) can rotate with the operating shaft (810), so that the push rod (820) drives the sliding member (830) to push the driving rod (230) toward the closing direction.

2. The manual closing structure of the magnetically controlled circuit breaker according to claim 1, characterized in that: The push rod (820) includes a push rod linkage portion (821) connected to the operating shaft (810), and the push rod linkage portion (821) is extended to be provided with at least one pushing arm (822). The sliding member (830) is provided with a driven shaft (831), and when the driven shaft (831) is in the first position, it is located on the movement path of the pushing arm (822). The pushing arm (822) is used to push the driven shaft (831) to slide to the second position. When the driven shaft (831) is in the second position, the pushing arm (822) is not on the path of the driven shaft (831) moving to the first position.

3. The manual closing structure of the magnetically controlled circuit breaker according to claim 2, characterized in that: The manual closing assembly (800) further comprises a reset spring (840), and the reset spring (840) is used to drive the sliding member (830) to reset from the second position to the first position along the opening direction.

4. The manual closing structure of the magnetically controlled circuit breaker according to claim 2, characterized in that: The push rod linkage portion (821) is respectively extended with two push arms (822), and the two push arms (822) are centrally symmetrically arranged with the third rotation center c as the symmetry center.

5. The manual closing structure of the magnetically controlled circuit breaker according to claim 1, characterized in that: The push rod (820) has a linkage hole, one end of the operating shaft (810) passes through the linkage hole, and a limit pin (850) is provided on the portion of the operating shaft (810) that passes through the linkage hole. The other end of the operating shaft (810) extends into the operating hole (931) of the circuit breaker housing (900). The circuit breaker housing (900) is provided with a limit protrusion (932) extending toward the push rod (820). The push rod (820) is located between the limit pin (850) and the limit protrusion (932) at its upper limit in the direction of the third rotation center c.

6. The manual closing structure of the magnetically controlled circuit breaker according to claim 1, characterized in that: The sliding member (830) includes a sliding plate (833) slidably mounted on the bracket (700), wherein the sliding plate (833) is arranged perpendicular to the third rotation center c, and the bracket (700) includes a guide plate (720), wherein the guide plate (720) and the sliding plate (833) are arranged at intervals along the direction of the third rotation center c.

7. The manual closing structure of the magnetically controlled circuit breaker according to claim 6, characterized in that: At least one guide shaft (832) is provided on the sliding plate (833) of the sliding member (830), and a guide hole (721) corresponding to the guide shaft (832) is provided on the guide plate (720) of the bracket (700), and the guide shaft (832) is slidably arranged in the guide hole (721) along the movement direction of the sliding member (830); And / or, the movement direction of the driving rod (230) is arranged perpendicular to the axial direction of the driving rod (230), and the sliding plate (833) of the sliding member (830) is extended with a driving arm (834), and the driving arm (834) is against the radial side of the driving rod (230) facing the opening direction.

8. A magnetically controlled circuit breaker, comprising a rotating shaft system (500), wherein at least one moving contact (510) is provided on the rotating shaft system (500), characterized in that: It also includes a manual closing structure of a magnetically controlled circuit breaker according to any one of claims 1 to 7, wherein a driving rod (230) of the manual closing structure is used to drive the moving contact (510) of the rotating shaft system (500) to contact or separate with the corresponding static contact (600) to conduct and disconnect the main circuit of the circuit breaker.

9. The magnetically controlled circuit breaker according to claim 8, characterized in that: It also includes a protection mechanism and a self-locking device. The electromagnetic mechanism (200) also includes a limiting rod (210) and a moving iron core (220). The limiting rod (210) is fixedly connected to the moving iron core (220). One end of the limiting rod (210) close to the moving iron core (220) is fixedly connected to the driving rod (230). The self-locking device comprises a fixing frame (100), a locking assembly (300) and a tripping assembly (400); the locking assembly (300) comprises a roller (310) arranged on the fixing frame (100); the roller (310) can perform circular motion around a first rotation center a to switch between a closing position and an opening position; the tripping assembly (400) comprises a push rod (410) and a push rod spring (420); the push rod (410) is rotatably arranged on the fixing frame (100) around a second rotation center b; The push rod spring (420) is used to drive the push rod (410) to push the roller (310) to move to the closing position, so that the roller (310) and the limiting rod (210) are locked together to prevent the moving iron core (220) from moving in the opening direction; the push rod (410) is used to rotate under external force to release the locking of the roller (310), so that the roller (310) and the limiting rod (210) are unlocked, so that the moving iron core (220) can move in the opening direction; The protection mechanism is used to drive the self-locking device to release, so that the driving rod (230) of the electromagnetic mechanism (200) drives the moving contact (510) to disconnect the main circuit.

10. The magnetically controlled circuit breaker according to claim 9, characterized in that: The limiting rod (210) is provided with a buckle surface (211) and a limiting surface (212); the buckle surface (211) is used for buckling with the roller (310) located at the closing position, and is used for pushing the roller (310) to move to the opening position when the limiting rod (210) moves with the moving iron core (220) in the opening direction, so that the limiting surface (212) can lock the roller (310) in the opening position, so that the roller (310) keeps the push rod spring (420) in the energy storage state through the push rod (410); The buckle surface (211) is perpendicular to the movement direction of the limiting rod (210), and the buckle surface (211) is vertically connected to the limiting surface (212); the roller (310) located at the closing position is blocked on the path of the buckle surface (211) moving in the opening direction; when the limiting rod (210) moves with the moving iron core (220) in the opening direction, the buckle surface (211) of the limiting rod (210) pushes the roller (310) to roll onto the limiting surface (212).

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