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 invention 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 achieved only by rotating an operating shaft without additionally providing an external power source, the operating shaft and a sliding part 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] This invention relates to the field of low-voltage electrical appliances, specifically to a manual closing structure for a magnetically controlled circuit breaker and the magnetically controlled circuit breaker itself. Background Technology

[0002] Intelligent molded case circuit breakers using permanent magnet control or coil control are new reclosing products introduced in the last two or three years. These products feature fast opening and closing speeds and long mechanical lifespan, but they all lack the function of manual closing. When problems occur during on-site use or during on-site installation and commissioning, an external power supply is required for the product to perform closing operations, causing significant inconvenience to on-site operations and posing safety hazards to users. Currently, the power grid industry requires that this type of product must have a manual closing function. Summary of the Invention

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

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The manual closing structure of a magnetically controlled circuit breaker includes...

[0006] support;

[0007] An 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] The manual closing assembly includes an operating shaft, a push rod, and a sliding member. The sliding member is slidably mounted on a bracket along the closing direction and can be switched from a first position to a second position. The sliding member is correspondingly mounted to the drive rod. The operating shaft is rotatably mounted around a third rotation center c. The push rod is connected to the operating shaft and can rotate with the operating shaft, causing the push rod to drive the sliding member to push the drive rod in the closing direction.

[0009] Optionally, the push rod includes a push rod linkage part connected to the operating shaft, the push rod linkage part extends to provide at least one push arm, the sliding member is provided with a driven shaft, the driven shaft is located on the movement path of the push arm when it is in the first position, the push 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 push arm is not on the movement path of the driven shaft in the first position.

[0010] Optionally, the manual closing assembly further includes a reset spring, which drives 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 provided with two push arms, and the two push arms are arranged in a centrally symmetrical manner 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 limiting pin is provided on the part of the operating shaft that extends out of the linkage hole. The other end of the operating shaft extends into the operating hole of the circuit breaker housing. A limiting protrusion extends from the circuit breaker housing toward the push rod. The upper limit of the push rod in the direction of the third rotation center c is located between the limiting pin and the limiting protrusion.

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

[0014] Optionally, the sliding plate of the slider is provided with at least one guide shaft, and the guide plate of the bracket is provided with a guide hole corresponding to the guide shaft. The guide shaft is slidably disposed in the guide hole along the movement direction of the slider.

[0015] And / or, the direction of movement of the drive rod is perpendicular to the axis of the drive rod, and the sliding plate of the sliding member extends to provide a drive arm, which abuts against the radial side of the drive rod facing the opening direction.

[0016] A magnetically controlled circuit breaker includes a rotating shaft system, on which at least one moving contact is provided, and further includes a manual closing structure of the magnetically controlled circuit breaker as described in any one of the claims. The driving rod of the manual closing structure is used to drive the moving contact of the rotating shaft system to contact or separate from the corresponding stationary contact, so as to connect and disconnect the main circuit of the circuit breaker.

[0017] Optionally, it also includes a protection mechanism and a self-locking device. The electromagnetic mechanism also includes a limit rod and a moving iron core. The limit rod is fixedly connected to the moving iron core, and the end of the limit rod near the moving iron core is fixedly connected to the drive rod.

[0018] The self-locking device includes a fixed frame, a locking assembly, and an unlocking assembly. The locking assembly includes a roller mounted on the fixed frame, which can rotate around a first rotation center a to switch between the closed and open positions. The unlocking assembly includes a push rod and a push rod spring, with the push rod rotatably mounted 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 closed position, so that the roller and the limit rod are engaged to prevent the moving iron core from moving in the opening direction; the push rod is used to be rotated by external force to release the lock on the roller, so that the roller and the limit rod are released from the engagement, 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 drive rod of the electromagnetic mechanism drives the moving contact to disconnect the main circuit.

[0021] Optionally, the limiting rod is provided with a latching surface and a limiting surface. The latching surface is used to engage with the roller in the closed position and to push the roller to the open position when the limiting rod moves with the moving iron core in the opening direction, so that the limiting surface can lock the roller in the open position, thereby the roller keeps the push rod spring in the energy storage state through the push rod.

[0022] The latching surface is perpendicular to the movement direction of the limiting rod, and the latching surface is perpendicularly connected to the limiting surface. The roller located in the closed position abuts against the path of the latching surface moving in the opening direction. During the process of the limiting rod moving in the opening direction with the moving iron core, the latching surface of the limiting rod pushes the roller to roll onto the limiting surface.

[0023] The present invention relates to a manual closing structure for a magnetically controlled circuit breaker and a magnetically controlled circuit breaker with a manual closing function. Regardless of whether the main circuit of the circuit breaker is energized, no external power supply is required. Simply rotate the operating shaft to rotate the push rod to push the sliding member to slide in the closing direction. In turn, the sliding member pushes the drive rod to move in the closing direction, thereby realizing the closing of the circuit breaker. This makes it more convenient for users to use on site. The operating shaft and the sliding member are driven by the push rod, which converts the rotation into linear sliding output to the drive rod. This makes manual rotation operation convenient and ensures reliable and stable manual closing.

[0024] In addition, the push arm pushes against 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 reset of the driven shaft, so that the push rod can perform manual closing operation in one direction without the need for manual reset or setting a reset part.

[0025] In addition, the top rod is driven by the top rod spring to push the roller and the limit rod to lock together to achieve the closing latch. The top rod releases the lock on the roller so that the roller and the limit rod are released to achieve the release and opening of the circuit breaker, ensuring that the circuit breaker can be closed quickly and reliably, and can be opened quickly and reliably with a small tripping force. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the magnetically controlled circuit breaker of the present invention;

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

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

[0029] Figure 4 This is a schematic diagram of the manual closing structure, self-locking device, and electromagnetic mechanism of the present invention.

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

[0031] Figure 6 This is a schematic diagram of the structure of the sliding plate of the present invention;

[0032] Figure 7 This is a perspective view of the self-locking device and rotating shaft system of the present invention;

[0033] Figure 8 This is a schematic diagram of the self-locking device and rotating shaft system during closing of the present invention;

[0034] Figure 9 This is a schematic diagram of the self-locking device and rotating shaft system during circuit breaker opening of the present invention;

[0035] Figure 10 This is a schematic diagram of the self-locking device and the rotating shaft system during the closing process of this invention;

[0036] Figure 11 This is a schematic diagram of the self-locking device of the present invention;

[0037] Figure 12 This is a schematic diagram of the limiting rod of the present invention;

[0038] Figure 13 This is a schematic diagram of the mounting plate of the present invention;

[0039] Figure 14 This is a cross-sectional view of the electromagnetic mechanism of the present invention;

[0040] Figure 15 This is a schematic diagram of the structure of the unfastening component of the present invention.

[0041] First rotation center a; Second rotation center b; Third rotation center c; Fixed frame 100; Mounting plate 110; Movable hole 111; Stop side wall 112; Hinge shaft hole 113; Stop arm 114; First hanging hole 115; Electromagnetic mechanism 200; Limiting rod 210; Fastening surface 211; Limiting surface 212; Through hole 213; Moving iron core 220; Moving iron core spring 221; Sliding hole 222; Drive rod 230; Strike rod 240; Strike elbow 241; Connecting part 242; Fixed part 243; Electromagnetic mechanism housing 250; Static iron core 260; Sliding shaft 261; Guide tube 270; Frame 280; Coil 290; Locking assembly 300; Roller 310; Linkage shaft 320; Connecting rod 330; Hinge shaft 340; Unfastening assembly 400; Push rod 410; Push rod rotating part 411; Trigger arm 41 2; Unlocking arm 413; First abutment surface 4131; Second abutment surface 4132; Impact surface 4133; Push rod spring 420; Push rod pivot 430; Limiting boss 431; Bushing 440; Pivot system 500; Moving contact 510; Support 520; Transmission arm 521; Transmission link 530; Stationary contact 600; Bracket 700; Side plate 710; Guide plate 721; Guide hole 721; Hand The circuit breaker assembly includes: 800; operating shaft; push rod; push rod linkage part; push arm; sliding member; driven shaft; guide shaft; sliding plate; drive arm; second hanging hole; reset spring; limit pin; circuit breaker housing; base; base; top cover; operating hole; limit protrusion; and limit protrusion. Detailed Implementation

[0042] The following embodiments, in conjunction with the accompanying drawings, further illustrate the manual closing structure of the magnetically controlled circuit breaker and specific implementation methods 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 descriptions in 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 installed inside the circuit breaker housing 900, a protection 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 base 920, and a top cover 930 stacked and fixed in sequence. The rotating shaft system 500 is provided with at least one moving 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 moving contact 510 of the rotating shaft system 500 to contact or separate from the corresponding stationary contact 600, so as to conduct and disconnect the main circuit of the circuit breaker, thereby realizing the closing and opening of the circuit breaker. The protection mechanism is used to drive the self-locking device to unlock when a fault occurs in the main circuit (overcurrent, overload, over / undervoltage, leakage, short circuit, etc.), so that the electromagnetic mechanism 200 drives the moving contact to disconnect the main circuit and realize the protection function. It should be noted that the protection mechanism is existing technology and can be one or more of the following: a manual trip button, a flux trip device, or a backup trip device with 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 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. The sliding member 830 is slidably mounted on the bracket 700 in the closing direction and can be switched from a first position to a second position. The sliding member 830 is correspondingly mounted to the drive rod 230. The operating shaft 810 is rotatably mounted around a third rotation center c. The push rod 820 is connected to the operating shaft 810 and can rotate with the operating shaft 810, causing the push rod 820 to drive the sliding member 830 to push the drive rod 230 in the closing direction. The manual closing structure 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 energized, no external power supply is required. Simply rotate the operating shaft 810 to make the push rod 820 rotate to push the sliding member 830 to slide in the closing direction. Thus, the sliding member 830 pushes the drive rod 230 to move in the closing direction, which can realize the circuit breaker closing. This makes it more convenient for users to use on site. The operating shaft 810 and the sliding member 830 are transmitted through the push rod 820, which converts the rotation into linear sliding output to the drive rod 230. This makes manual rotation operation convenient and ensures reliable and stable manual closing.

[0045] like Figure 3As shown, the push rod 820 in this embodiment includes a push rod linkage part 821 connected to the operating shaft 810. The push rod linkage part 821 extends to provide at least one push arm 822. The sliding member 830 is provided with a driven shaft 831. When the driven shaft 831 is in the first position, it is located on the movement 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 on the path of the driven shaft 831 moving to the first position. The push arm 822 pushes the driven shaft 831 to achieve the drive between the push rod 820 and the sliding member 830. The structure is simple, the drive is stable and reliable, and the push arm 822 does not interfere with the reset of the driven shaft 831, so that the push rod 820 can be manually closed in one direction without the need for manual reset or the setting of a reset member.

[0046] Preferably, the push rod linkage part 821 extends with two push arms 822, which are centrally symmetrical about the third rotation center c. This centrally symmetrical arrangement of the two push arms 822 reduces the angle of manual rotation of 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 also includes a reset spring 840, which drives the sliding member 830 to reset from the second position to the first position along the opening direction. In this embodiment, the reset spring 840 drives the sliding member 830 to reset, making room for the drive rod 230 to move in the opening direction, thus avoiding adding extra burden to the circuit breaker's opening. Of course, in other embodiments, the reset spring 840 may not be provided; when the drive rod 230 moves in the opening direction, it pushes the sliding member 830 back to the first position. Specifically, the reset spring 840 is located below the fixing frame 100, with one end hooked in the first hanging hole 115 of the fixing frame 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 part 821 is a ring structure with an axially arranged linkage hole. One end of the operating shaft 810 passes through the linkage hole, and a limiting pin 850 is installed on the part of the operating shaft 810 that extends out of 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 extends towards the push rod 820 and is provided with a limiting protrusion 932. The upper limit of the push rod 820 in the direction of the third rotation center c is located between the limiting pin 850 and the limiting protrusion 932 to prevent the push rod 820 from deviating axially along the operating shaft 810 and to improve the synchronization of the rotation of the push rod 820 and the operating shaft 810. Wherein, the third rotation center c is the axis of the operating shaft 810; the limiting 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 separately configured. The push rod 820 and the operating shaft 810 rotate synchronously through a linkage hole in the axial direction of the push rod linkage part 821 through which the operating shaft 810 passes. Of course, in other embodiments, the push rod linkage part 821 may not have a linkage hole, and the push rod 820 may be integrally formed with the operating shaft 810.

[0049] like Figure 5 and Figure 6 As shown, the sliding member 830 in 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 both sides of the sliding plate 833. The two side plates 710 are spaced apart. One side plate 710 extends towards 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 plate 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 in a suitable position inside the circuit breaker housing 900 (e.g., side plate 710, top cover 930, etc.).

[0050] like Figure 4 As shown, the sliding plate 833 of the sliding member 830 is provided with at least one guide shaft 832, and the guide plate 720 of the bracket 700 is provided with a guide hole 721 corresponding to the guide shaft 832. 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 and the guide hole 721 are slidably engaged, and the guide shaft 832 guides 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 its axial direction. The sliding plate 833 of the sliding member 830 extends to provide a drive arm 834, which abuts against the radial side of the drive rod 230 facing the opening direction. The drive structure between the sliding member 830 and the drive rod 230 is simple and can stably drive in the same direction, improving the reliability of manual closing.

[0052] For example, such as Figure 4 and Figure 5 As shown, the guide plate 720 and the sliding plate 833 are arranged in parallel and perpendicular to the side plate 710. The side plates 710 are spaced apart along the axial direction of the drive rod 230, and each side plate 710 has a first through hole through which the drive rod 230 passes. The push rod 820 is positioned close to the guide plate 720 and away from the sliding plate 833. The guide shaft 832 and the driven shaft 831 are both located on the side of the sliding plate 833 facing the guide plate 720. The driven shaft 831 passes through a guide hole 721 on the guide plate 720 and is correspondingly positioned to the push arm 822 of the push rod 820. The sliding plate 833 has an L-shaped structure. Two guide shafts 832 are provided at one end of the sliding plate 833, a driven shaft 831 is provided in the middle of the sliding plate 833, and a guide shaft 832 is provided at the other end of the sliding plate 833. The center lines connecting the driven shaft 831 and the three guide shafts 832 form an L-shape with the center of the driven shaft 831 as the intersection point. Correspondingly, the guide plate 720 has three guide holes 721 that correspond one-to-one with the three guide shafts 832. In this embodiment, the guide shafts 832 and driven shaft 831 are separately disposed from the sliding plate 833. The guide shafts 832 and driven shaft 831 are mounted on the sliding plate 833 through shaft holes provided on the sliding plate 833, simplifying the structure of the sliding plate 833 and making it easier to manufacture. Of course, the guide shafts 832 and driven shaft 831 can also be integrally formed into a cylindrical structure 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 an unlocking assembly 400. The electromagnetic mechanism 200 includes a limiting rod 210 and a moving iron core 220, with the limiting rod 210 and the moving iron core 220 fixedly connected. The locking assembly 300 includes a roller 310 mounted on the fixed frame 100, which can rotate around a first rotation center a to switch between the closed and open positions. The unlocking assembly 400 includes a push rod 410 and a push rod spring 420, with the push rod 410 rotatably mounted on the fixed frame 100 around a second rotation center b.

[0054] The push rod spring 420 drives the push rod 410 to push the roller 310 to the closed position, causing the roller 310 to engage with the limit rod 210 to prevent the moving iron core 220 from moving in the opening direction. The push rod 410 is rotated by external force to release the lock on the roller 310, thus releasing the engagement between the roller 310 and the limit rod 210, allowing the moving iron core 220 to move in the opening direction. The push rod spring 420 drives the push rod 410 to push the roller 310 against the limit rod 210 to achieve the closing lock, and the push rod 410 releases the lock on the roller 310 to release the engagement between the roller 310 and the limit rod 210, thus achieving the release and opening of the circuit breaker. This ensures that the circuit breaker can close quickly and reliably, and open 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 in this embodiment has multiple implementations. One optional implementation is that the electromagnetic mechanism 200 further includes a driving rod 230, and one end of the limiting rod 210 near the moving iron core 220 is fixedly connected to the driving rod 230. The driving rod 230 passes through the through hole 213 of the limiting rod 210 and is arranged perpendicularly to the limiting rod 210. The rotating shaft system 500 further includes a support member 520 and a transmission connecting rod 530. The moving contact 510 is disposed on the support member 520. The support member 520 is rotatably disposed. The support member 520 extends to provide a transmission arm 521 for hinged to one end of the transmission connecting rod 530. The other end of the transmission connecting rod 530 is hinged to the driving rod 230. The drive rod 230 moves in the closing direction, driving the transmission link 530 of the rotating shaft system 500. This transmission link 530 causes the support member 520 to rotate, causing the moving contact 510 to rotate with the support member 520 and contact the corresponding stationary contact 600, thus closing the circuit breaker. Similarly, the drive rod 230 moves in the opening direction, driving the transmission link 530 of the rotating shaft system 500. This transmission link 530 causes the support member 520 to rotate, causing the moving contact 510 to rotate with the support member 520 and separate from the corresponding stationary contact 600, thus opening the circuit breaker. Alternatively, other transmission structures can be used to drive the support member 520 to rotate.

[0056] like Figure 10As shown, the electromagnetic mechanism 200 in this embodiment also includes a striking rod 240. The end of the limiting rod 210 away from the moving 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 to the closing position when the limiting rod 210 moves with the moving iron core 220 in the closing direction. When closing, the push rod 410 can rotate under the joint drive of the push rod spring 420 and the striking rod 240, avoiding the problem that the push rod 410 cannot rotate or cannot rotate to the correct position due to deformation failure or insufficient elasticity of the push rod spring 420, thus improving the reliability of the closing latch.

[0057] For example, such as Figure 9 and Figure 10 As shown, the striking rod 240 in this embodiment is a one-piece molded structure, including an L-shaped connecting part 242 and a U-shaped fixing part 243. The two sides of the fixing part 243 clamp the end of the limiting rod 210 away from the moving iron core 220 and are fixed together by rivets. The opening of the connecting part 242 faces the limiting rod 210. One end of the connecting part 242 is connected to the bottom edge of the fixing part 243, and the other end is bent toward the limiting rod 210 to form a striking bend 241 for pushing against the top rod 410. The overall structure is simple and easy to connect. The L-shaped connecting part 242 avoids interference with other parts during movement and is mainly used to avoid the movement trajectory of the roller 310. It also gives the striking bend 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 part 243 does not have to be U-shaped.

[0058] like Figure 11 and Figure 12 As shown, the cooperation structure between the limiting rod 210 and the roller 310 in this embodiment is such that the limiting rod 210 is provided with a latching surface 211 and a limiting surface 212. The latching surface 211 is used to latch and cooperate with the roller 310 when it is in the closed position, and is used to push the roller 310 to the open 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 open position, thereby the roller 310 keeps the push rod spring 420 in the energy storage state through the push rod 410.

[0059] Preferably, the latching surface 211 is perpendicular to the movement direction of the limiting rod 210, and the latching surface 211 is perpendicularly connected to the limiting surface 212. The roller 310, located in the closed position, abuts against the path of the latching surface 211 moving towards the open direction. During the movement of the limiting rod 210 with the moving iron core 220 towards the open direction, the latching surface 211 of the limiting rod 210 pushes the roller 310 to roll onto the limiting surface 212. The roller 310 and the latching surface 211 latch together to achieve a stable locking state, preventing slippage. Moreover, during the unlocking process of the self-locking device, the roller 310 rolls and makes circular motion on the latching surface 211 to gradually separate from the latching surface 211 until the roller 310 automatically switches to rolling on the limiting surface 212. The action is smooth and continuous, preventing the device from getting 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 limit rod 210. The fixing frame 100 includes two mounting plates 110 spaced apart along the first rotation center a. Two side plates 710 are vertically arranged on both sides of the two mounting plates 110. The mounting plates 110 are riveted to the side plates 710, and the two mounting plates 110 form an installation space. The end of the limit rod 210 away from the moving iron core 220 extends into the installation space. The roller 310 and the top 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 limit rod 210 moving in the opening direction, and the second rotation center b of the top rod 410 is located on one side of the limit rod 210. The structure is compact, making the movement path of the roller 310 short, so as to quickly realize the closing lock and unlocking opening, further improving the opening and closing speed.

[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 pass through the movable holes 111 of the two mounting plates 110 respectively 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 side of the two mounting plates 110 through the two hinge shafts 340. The two hinge shafts 340 are coaxially arranged, and the first rotation center a is the axis of the hinge shaft 340.

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

[0063] like Figure 11 and Figure 13 As shown, the push rod 410 in this embodiment is an integrally formed structure, including a push rod rotating part 411. The push rod rotating part 411 is rotatably mounted on the fixed frame 100 via a push rod rotating shaft 430. The push rod rotating shaft 430 is mounted on the fixed frame 100. The push rod rotating part 411 has a first shaft hole that rotatably engages 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 radial extensions of the push rod rotating part 411 are respectively provided with a trigger arm 412 for receiving external force and an unlocking arm 413 that engages with the roller 310. When the roller 310 is in the closed position, the trigger arm 412 extends out of the installation space through the second through hole on the side plate 710, corresponding to the protection mechanism. Figures 8-10 As shown, the release arm 413 has a first abutting surface 4131, a second abutting surface 4132 and a striking surface 4133 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 bend 241 of the striking rod 240.

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

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

[0066] Preferably, the fixing frame 100 is provided with a stop arm 114, which abuts against the first contact surface 4131 of the release arm 413 when the roller 310 is in the closed position. The release arm 413 of the push rod 410 cooperates with the stop arm 114 to limit the rotation stroke of the push rod 410, thereby making the roller 310 stably stay in the closed position and improving the stability and reliability of the device's closing latch.

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

[0068] like Figure 14 As shown, the electromagnetic mechanism 200 of this embodiment has multiple implementations. One optional implementation is that the electromagnetic mechanism 200 further includes a stationary iron core 260, a sliding shaft 261, a guide tube 270, a frame 280, and a coil 290 installed inside the electromagnetic mechanism housing 250. 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 frame 280. The guide tube 270 is disposed in the axial hole of the frame 280. The stationary iron core 260 is fixed in one end of the guide tube 270. The moving iron core 220 is slidably disposed in the other end of the guide tube 270 and is disposed opposite to the stationary iron core 260. The moving iron core 220 has a sliding hole 222 axially provided for sliding cooperation with the sliding shaft 261. One end of the sliding shaft 261 is fixedly connected to the stationary 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 stationary 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 disposed 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 stationary iron core 260. When the coil 290 is energized, the moving iron core 220 is attracted to the stationary iron core 260 under the action of electromagnetic force, and the limiting rod 210 and the driving rod 230 move 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 open position, the push rod 410 is subjected to a counterclockwise torque from the push rod spring 420 (that is, the push rod spring 420 is in an energy storage state), the first contact 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 the circuit breaker closes automatically, if Figure 10 As shown, when the moving iron core 220 moves upward (in the closing direction) under the action of electromagnetic force, the limit rod 210 and the drive rod 230 move with the moving iron core 220 in the closing direction. The roller 310 passes over the limit surface 212. At this time, the push rod spring 420 releases energy to drive the push rod 410 to rotate clockwise until the first abutment surface 4131 is limited by the stop arm 114. At the same time, the push rod 410 pushes the roller 310 to make a clockwise circular motion through the second abutment surface 4132 until the linkage shaft 320 is limited by the stop side wall 112 of the fixed frame 100 (i.e., 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 it is subjected to the downward reaction force of the moving iron core spring 221, which causes 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 held by the push rod 410, forming a locked and stable state.

[0071] The difference between manual 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. This causes the push rod 820 to push the arm 822 against the driven shaft 831 of the sliding member 830, thereby causing the sliding member 830 to slide towards the second position in the closing direction. This causes the driving arm 834 of the sliding member 830 to push the driving rod 230 to move in the closing direction, thereby causing the limit rod 210 and the moving iron core 220 to move in the closing direction with the driving rod 230.

[0072] When the circuit breaker is opened, the push rod 410 moves clockwise under the impact of the protection mechanism. When the second contact surface 4132 of the push rod 410 separates from the roller 310, the self-locking device is released. The moving iron core 220 moves downward (in the opening direction) under the drive of the moving iron core spring 221, so that the limit rod 210 pushes the roller 310 to move counterclockwise quickly through the latching surface 211 until the roller 310 contacts the first contact surface 4131 of the push rod 410 and the limit surface 212 of the limit rod 210 (i.e., the roller 310 is in the open position).

[0073] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0074] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A manual closing structure for a magnetically controlled circuit breaker, characterized in that: include Bracket (700); The electromagnetic mechanism (200) includes a drive rod (230), which can move in the closing direction to realize the closing of the circuit breaker and can move in the opening direction to realize the opening of the circuit breaker. The manual closing assembly (800) includes an operating shaft (810), a push rod (820), and a sliding member (830). The sliding member (830) is slidably mounted on a bracket (700) along the closing direction and can be switched from a first position to a second position. The sliding member (830) is correspondingly mounted to the drive rod (230). The operating shaft (810) is rotatably mounted around a third rotation center c. The push rod (820) is connected to the operating shaft (810) and can rotate with the operating shaft (810), causing the push rod (820) to drive the sliding member (830) to push the drive rod (230) in 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 part (821) connected to the operating shaft (810). The push rod linkage part (821) extends to provide at least one push arm (822). The sliding member (830) is provided with a driven shaft (831). When the driven shaft (831) is in the first position, it is located on the movement 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 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 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.

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

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 limiting pin (850) is provided on the part of the operating shaft (810) that extends out of the linkage hole. The other end of the operating shaft (810) extends into the operating hole (931) of the circuit breaker housing (900). A limiting protrusion (932) extends from the circuit breaker housing (900) 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 limiting pin (850) and the limiting protrusion (932).

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). The sliding plate (833) is perpendicular to the third rotation center c. The bracket (700) includes a guide plate (720). The guide plate (720) and the sliding plate (833) are spaced apart 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: The sliding plate (833) of the sliding member (830) is provided with at least one guide shaft (832), and the guide plate (720) of the bracket (700) is provided with a guide hole (721) corresponding to the guide shaft (832). The guide shaft (832) is slidably disposed in the guide hole (721) along the movement direction of the sliding member (830). And / or, the direction of movement of the drive rod (230) is perpendicular to the axis of the drive rod (230), and the sliding plate (833) of the sliding member (830) extends to provide a drive arm (834), which abuts against the side of the drive rod (230) in the radial direction of the opening direction.

8. A magnetically controlled circuit breaker, comprising a shaft system (500), wherein the shaft system (500) is provided with at least one moving contact (510), characterized in that: It also includes a manual closing structure for the magnetically controlled circuit breaker according to any one of claims 1-7, wherein the drive 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 from the corresponding stationary contact (600) in order to connect 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), and the end of the limiting rod (210) near the moving iron core (220) is fixedly connected to the drive rod (230). The self-locking device includes a fixed frame (100), a locking assembly (300), and an unlocking assembly (400). The locking assembly (300) includes a roller (310) mounted on the fixed frame (100). The roller (310) can rotate around a first rotation center a to switch between the closed and open positions. The unlocking assembly (400) includes a push rod (410) and a push rod spring (420). The push rod (410) is rotatably mounted on the fixed 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 the closed position, so that the roller (310) and the limit rod (210) are engaged to prevent the moving iron core (220) from moving in the opening direction; the push rod (410) is used to be rotated by external force to release the lock on the roller (310), so that the roller (310) and the limit rod (210) are released from the engagement, 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 unlock, so that the drive 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 latching surface (211) and a limiting surface (212). The latching surface (211) is used to latch and cooperate with the roller (310) located in the closed position, and is used to push the roller (310) to the open 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 open position, so that the roller (310) keeps the top rod spring (420) in the energy storage state through the top rod (410); The latching surface (211) is perpendicular to the movement direction of the limiting rod (210), and the latching surface (211) is perpendicularly connected to the limiting surface (212). The roller (310) located in the closed position abuts against the path of the latching surface (211) moving in the opening direction. During the process of the limiting rod (210) moving in the opening direction with the moving iron core (220), the latching surface (211) of the limiting rod (210) pushes the roller (310) to roll onto the limiting surface (212).

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