A molded case circuit breaker and an assembling device thereof

Abstract

The application relates to the field of plastic shell circuit breaker processing, in particular to a plastic shell circuit breaker and an assembling device thereof, which comprises a circuit breaker shell and a circuit breaker assembly, the circuit breaker assembly is located in the circuit breaker shell, the circuit breaker shell comprises a lower shell and an upper shell, a plurality of positioning columns are fixedly connected to the lower end of the upper shell, a plurality of positioning seats matched with the positioning columns are fixedly connected to the upper end of the lower shell, a hidden groove is arranged on each side of the upper shell, and an L-shaped protection plate is arranged in each hidden groove. The circuit breaker is partly hidden by screws, the screws can be hidden and blocked after screw limiting is completed, the influence of the external environment on the screws is reduced, the strength and service life after connection are improved, the automatic continuous assembly of the circuit breaker can be realized by the assembling device, the rotating nail and the screw can always be in the coaxial state, and the rotating nail is located in the driving groove of the screw during thread connection.

Description

Technical Field

[0001] This invention relates to the field of molded case circuit breaker manufacturing, and more particularly to a molded case circuit breaker and its assembly device. Background Technology

[0002] In smart grid power systems, molded case circuit breakers (MCCBs) are important circuit protection devices and are widely used in the distribution and protection of various electrical lines. Their performance stability and service life are directly related to the safe operation of the power system.

[0003] In traditional molded case circuit breakers, screws are typically exposed in the structural design. During long-term use, exposed screws are susceptible to corrosion from external environmental factors, such as moisture in humid air and corrosive gases in industrial environments, leading to rust and corrosion, which in turn affects the connection strength of the circuit breaker.

[0004] In the assembly of circuit breaker housings, current assembly methods generally fall into two categories: manual operation and automated assembly. Manual assembly has a low degree of automation, and its production efficiency is insufficient to meet the needs of large-scale production. Automated assembly often uses industrial robots, which typically pre-assemble screws onto the upper housing and then use rotating screws to move them down and tighten them. In this process, since there are multiple screws on a single circuit breaker, the existing methods generally involve tightening them sequentially. However, molded case circuit breaker housings are mostly made of thermosetting or thermoplastic engineering plastics, which have certain elasticity, slight deformation, and thin-walled, weak rigidity. If they are tightened sequentially in one direction, once the first screw is fully locked, the cover plate is forcibly pulled against the housing cover plate, causing slight bending, warping, and localized stretching. This results in radial misalignment and offset of subsequent screw holes relative to the housing studs, leading to problems with subsequent holes. Problems arose with screwing in the screws. Additionally, since the screws were pre-assembled, it was impossible to guarantee that the screw's drive groove (such as a Phillips head) would perfectly align with the rotating pin on the assembly device. During subsequent screwing operations, as the rotating pin moved down and rotated, the screw thread and the connecting hole thread were in hard contact. Therefore, this pressure-driven rotating pin was prone to slippage and free-spinning before engaging the drive groove, which could damage the screw groove, cause the screw to become misaligned, and affect subsequent assembly. Furthermore, since the downward pressure action continued, the screw moving down without rotating would compress the thread groove on the lower housing, causing thread damage and affecting subsequent connection. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a molded case circuit breaker and its assembly device. The circuit breaker part utilizes a screw-concealed design, which hides and blocks the screw after it is positioned, reducing the impact of the external environment on the screw and improving the strength and service life of the connection. In addition, the assembly device part can realize the automated continuous assembly of the circuit breaker, while ensuring that the rotating pin and the screw are always coaxial, and that the rotating pin is located inside the drive groove of the screw during threaded connection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A molded case circuit breaker includes a circuit breaker housing and a circuit breaker assembly. The circuit breaker assembly is located inside the circuit breaker housing. The circuit breaker housing includes a lower housing and an upper housing. Multiple positioning posts are fixedly connected to the lower end of the upper housing, and multiple positioning seats that mate with the positioning posts are fixedly connected to the upper end of the lower housing. Hidden grooves are provided on both sides of the upper housing, and L-shaped protective plates are installed inside each of the two hidden grooves. Rectangular pull rings are fixedly connected to the opposite sides of the two L-shaped protective plates. A connecting mechanism is included, comprising multiple threaded holes opened at the upper end of the lower housing, and the bottom of each of the two hidden grooves has openings corresponding to the threaded holes. The shaft has a circular opening, and each circular opening has a mounting plate above it. Each mounting plate has a limiting screw that mates with the circular opening through its center. Each limiting screw is rotatably connected to the corresponding mounting plate via a bearing. The lower end of each mounting plate is elastically connected to the inner bottom of the hidden groove via multiple second springs. Each mounting plate has a vertically slidable guide rod that mates with the inner bottom of the hidden groove at its lower end. The vertical parts of the two L-shaped protective plates are fixedly connected to opposite sides by two abutment blocks that mate with the limiting screws. The two L-shaped protective plates are connected by a synchronization mechanism.

[0007] Preferably, the synchronization mechanism includes two transmission cavities symmetrically opened between the inner walls of the upper housing. Each transmission cavity is connected to two sliders. The opposite sides of the two mating sliders are fixedly connected to racks. A rotating shaft is rotatably connected between the front and rear inner walls of each transmission cavity. A transmission gear is fixedly connected to each rotating shaft. The two mating racks are located above and below the corresponding transmission gears, respectively, and mesh with the corresponding transmission gears. The opposite sides of the two sliders are elastically connected to the inner wall of the corresponding transmission cavity through a first spring. A connecting rod is fixedly connected to the opposite sides of the two sliders. The other end of each connecting rod passes through the inner wall of the corresponding transmission cavity and is fixedly connected to the corresponding L-shaped protective plate. Guide slots are provided on the inner walls of the two hidden slots on opposite sides, and guide plates are fixedly connected to the horizontal parts of the two L-shaped protective plates on opposite sides.

[0008] The present invention also discloses an assembly device for a molded case circuit breaker, used for assembling the circuit breaker, including a base, a lifting plate provided at the upper end of the rear part of the base, and multiple rotating shafts rotatably connected to the lower end of the lifting plate. Each rotating shaft is fixedly connected to a rotating pin at its lower end. The multiple rotating pins cooperate with multiple limiting screws respectively. The multiple rotating pins move downward and rotate synchronously through a driving mechanism. When the rotating pin moves downward and contacts the corresponding limiting screw, the downward rotation of the rotating pin will cooperate with the elastic action of the first spring to automatically and without damage align with the driving groove of the limiting screw, so that the driving limiting screw moves downward and rotates to perform the assembly operation. The shifting mechanism allows the two rectangular pull rings on the circuit breaker housing to move in opposite directions during the downward movement of the lifting plate, thus preventing the two L-shaped protective plates from interfering with the assembly. The loading and unloading mechanism enables continuous automated assembly of the circuit breaker housing.

[0009] Preferably, the driving mechanism includes a mounting bracket fixedly connected to the upper rear side of the base, an adjusting seat fixedly connected to the rear side of the mounting bracket, a lifting groove opened on the front side of the adjusting seat, a second threaded rod rotatably connected between the upper and lower inner walls of the lifting groove, a sliding seat threadedly connected to the second threaded rod, the sliding seat slidably connected to the inner wall of the lifting groove, and the front side of the sliding seat fixedly connected to the lifting plate.

[0010] Preferably, a crossbeam is fixedly connected to the front side of the adjusting seat, and a second motor is installed at the upper end of the crossbeam. The output shaft of the second motor is connected to the second threaded rod through a transmission assembly. A rotating tube is rotatably connected to the lower end of the lifting plate. A drive gear is installed on the rotating tube. The drive gear and the rotating tube are rotatably connected through a one-way bearing. A driven gear that meshes with the drive gear is fixedly connected to the outer side of each rotating shaft. The lower end of the output shaft of the second motor passes through the rotating tube. Rectangular limiting grooves are opened on both sides of the output shaft of the second motor. Two rectangular limiting strips are symmetrically fixedly connected to the inner side of the rotating tube. The inner sides of the two rectangular limiting strips extend into the corresponding rectangular limiting grooves.

[0011] Preferably, the transmission assembly includes two synchronous pulleys, which are respectively mounted on the output shaft of the second motor and the second threaded rod, and are connected by a synchronous belt.

[0012] Preferably, the displacement mechanism includes a fixed plate fixedly connected to one side of the adjustment seat, and a guide groove is provided on the fixed plate. The guide groove is composed of two vertical sections and one inclined section. The lifting plate has a sliding cavity inside, and a sliding plate is slidably connected inside the sliding cavity. A strip-shaped opening is opened on the rear side wall of the sliding cavity. An abutment rod is fixedly connected to the rear side of the lifting plate. The rear end of the abutment rod passes through the strip-shaped opening and extends into the guide groove. Two connecting strips are symmetrically fixedly connected to one side of the sliding plate. The other end of each connecting strip passes through the corresponding inner wall of the sliding cavity. A moving rod is fixedly connected to the lower side of the end of each connecting strip away from the sliding plate. The lower end of each moving rod is engaged with a corresponding rectangular pull ring.

[0013] Preferably, the loading and unloading mechanism includes a first loading conveyor and a second loading conveyor that are symmetrically fixedly connected to the upper end of the base. A unloading conveyor is provided on the right side of the upper part of the base. A sliding groove is provided at the upper middle part of the base. A first threaded rod is slidably connected between the front and rear inner walls of the sliding groove. A placement box that can slide back and forth is threadedly connected to the first threaded rod. A first motor is installed on the front side of the base. The output shaft of the first motor extends into the sliding groove and is fixedly connected to the front end of the first threaded rod. A six-axis robot is installed on the ground. A controller is installed on the upper part of the base, and the controller is electrically connected to the first feeding conveyor, the second feeding conveyor, the unloading conveyor, the six-axis robot, and the second motor.

[0014] Preferably, it also includes a detection mechanism, which includes two vertical mounting strips symmetrically fixedly connected to the upper end of the base. Each of the two vertical mounting strips has a groove on its opposite side. Each of the two grooves has a wedge-shaped baffle slidably connected inside it. The opposite sides of the two wedge-shaped baffles are elastically connected to the inner wall of the corresponding groove through a third spring. The inclined surfaces of the two wedge-shaped baffles face forward. The upper end of the rear part of the base has a rearwardly inclined separation groove.

[0015] Preferably, it also includes a limiting mechanism, which includes a rear stop bar fixedly connected to the mounting bracket, and two upper stop bars are symmetrically fixedly connected to the front side of a portion of the rear stop bar.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. By setting up a connecting mechanism, after the limit screw is connected, the L-shaped protective plate moves back, and the abutment block blocks the upper end face of the limit screw to achieve self-locking. The second spring acts like a spring washer, improving the connection stability. At the same time, the L-shaped protective plate provides a sealing effect, reducing the possibility of the screw being corroded by the external environment, and effectively extending the service life of the connecting screw and the circuit breaker.

[0017] 2. The synchronization mechanism allows operators to move the L-shaped protective plates on both sides in opposite directions synchronously by pulling the rectangular pull ring on one side, thus realizing the opening and closing operation. This greatly facilitates the connection and disassembly of the upper and lower housings of the circuit breaker and improves the convenience and efficiency of operation.

[0018] 3. This assembly equipment achieves automated and precise assembly of circuit breakers, reducing manual intervention and minimizing assembly damage. The drive mechanism ensures that multiple rotating pins move down and rotate synchronously, guaranteeing the simultaneous assembly of multiple limit screws, improving assembly efficiency and pass rate, meeting the needs of large-scale production, and preventing the direct tightening of a single limit screw from affecting the tightening of subsequent limit screws.

[0019] 4. When the rotating pin moves downward and contacts the limit screw, the circumferential micro-adjustment force can automatically correct the angle deviation. Combined with the flexible elasticity compensation of the first spring, it can adaptively match the deviation, accurately engage in the drive slot, avoid bumps and damage, reduce the defective product output rate, and reduce part wear and production costs.

[0020] 5. During the downward movement of the lifting plate, the shifting mechanism causes the two rectangular pulling rings to move in opposite directions, so that the L-shaped protective plate avoids the assembly area, avoids interference with the rotating nail operation, ensures smooth assembly process, and improves assembly efficiency and quality.

[0021] 6. The loading and unloading mechanism enables continuous automated assembly of circuit breaker housings, covering the entire process of loading, assembly, and unloading. This reduces manual operation, improves assembly efficiency, avoids damage to parts and assembly deviations caused by manual loading and unloading, enables continuous production, and meets the needs of batch assembly.

[0022] 7. The testing agency can automatically separate qualified and unqualified products without manual inspection, improving testing efficiency and accuracy, preventing unqualified products from flowing into subsequent processes, ensuring product quality, and reducing quality risks. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the molded case circuit breaker proposed in this invention; Figure 2 This is a schematic cross-sectional view of the upper shell; Figure 3 for Figure 1 A schematic diagram showing the L-shaped protective plate after it has been separated. Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the structure of one of the L-shaped protective plates; Figure 6 A schematic diagram of an assembly device for a molded case circuit breaker; Figure 7 for Figure 6 A three-dimensional structural diagram after removing the six-axis robotic arm and the main body of the circuit breaker; Figure 8 This is a cross-sectional view of one of the vertical mounting strips; Figure 9 for Figure 7A schematic diagram after removing the base, loading / unloading mechanism, and two vertical mounting strips; Figure 10 for Figure 9 Front plan view; Figure 11 A cross-sectional view of the connection between the output shaft of the second motor and the rotating tube; Figure 12 for Figure 9 A diagram showing the view from below; Figure 13 for Figure 9 Partial cross-sectional view.

[0024] In the diagram: 1 Lower housing, 2 Upper housing, 3 Positioning post, 4 Positioning seat, 5 Hidden groove, 6 L-shaped protective plate, 7 Rectangular pull ring, 8 Transmission cavity, 9 Slider, 10 Rack, 11 Transmission gear, 12 Rotating shaft, 13 First spring, 14 Guide slot, 15 Mounting plate, 16 Guide rod, 17 Second spring, 18 Round opening, 19 Limit screw, 20 Abutment block, 21 Base, 22 First feeding conveyor, 23 Second feeding conveyor, 24 Unloading conveyor, 25 Six-axis robot, 26 Controller, 27 Placement box, 28 Sliding groove, 29 First motor, 30 First threaded rod, 31 Vertical 32 Installation bar, 33 Separation groove, 33 Mounting bracket, 34 Adjustment seat, 35 Crossbar, 36 Lifting groove, 37 Second threaded rod, 38 Transmission assembly, 39 Second motor, 40 Fixing plate, 41 Sliding seat, 42 Lifting plate, 43 Upper blocking bar, 44 Rotating nail, 45 Guide groove, 46 Rotating shaft, 47 Driven gear, 48 Rotating tube, 49 Driving gear, 50 Connecting bar, 51 Moving rod, 52 Sliding cavity, 53 Sliding plate, 54 Strip-shaped opening, 55 Abutting rod, 56 Guide insert plate, 57 Third spring, 58 Wedge baffle, 59 Rear blocking bar, 60 Rectangular limiting groove, 61 Rectangular limiting bar. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] The circuit breaker of this invention belongs to the relevant part of the smart grid industry and is used to protect the circuit. Specifically, it involves the improvement of the connection part to ensure the connection strength and service life of the connection part. The assembly equipment belongs to the industrial robot for automated assembly in the intelligent manufacturing equipment industry. Specifically, it is used to perform screw-in connection operation on the housing part of the circuit breaker, which can reduce the defect rate.

[0027] Reference Figures 1-5A molded case circuit breaker includes a circuit breaker housing and a circuit breaker assembly. The circuit breaker assembly is located inside the circuit breaker housing and is used to realize circuit switching control and overload protection. This belongs to the prior art. The circuit breaker housing includes a lower housing 1 and an upper housing 2. The lower housing 1 and the upper housing 2 are interlocked to form a complete housing space for encapsulating and protecting the internal circuit breaker assembly. A plurality of positioning posts 3 are fixedly connected to the lower end of the upper housing 2, and a plurality of positioning seats 4 that cooperate with the positioning posts 3 are fixedly connected to the upper end of the lower housing 1. The cooperation between the positioning posts 3 and the positioning seats 4 The upper shell 1 and the lower shell 2 are used to achieve precise positioning and alignment when they are fastened together, ensuring that the relative positions of the upper and lower shells are accurate. Hidden slots 5 are provided on both sides of the upper shell 2. The hidden slots 5 are used to accommodate and store the protective components that will be deployed later. L-shaped protective plates 6 are provided inside the two hidden slots 5. The L-shaped protective plates 6 are used to cover the connection part after the upper shell 2 and the lower shell 1 are connected. Rectangular pull rings 7 are fixedly connected to the opposite sides of the two L-shaped protective plates 6. The rectangular pull rings 7 are used for the operator to manually hold and pull the L-shaped protective plates 6. The system also includes a connecting mechanism, which comprises multiple threaded holes on the upper end of the lower housing 1. Two concealed grooves 5 each have a circular opening 18 coaxial with the threaded holes at their bottom. A mounting plate 15 is positioned above each circular opening 18. A limiting screw 19, cooperating with the circular opening 18, is passed through the center of each mounting plate 15. Each limiting screw 19 is rotatably connected to the corresponding mounting plate 15 via a bearing. The lower end of each mounting plate 15 is elastically connected to the inner bottom of the concealed groove 5 via multiple second springs 17. A slidable guide rod 16 is vertically passed through each mounting plate 15, and the lower end of each guide rod 16 is elastically connected to the inner bottom of the concealed groove 5. Two abutment blocks 20, cooperating with the limiting screws 19, are fixedly connected to opposite sides of the vertical sections of the two L-shaped protective plates 6. When the upper housing 2 and lower housing 1 are not connected, such as... Figure 1 In the state shown, the abutment block 20 abuts against one side wall of the corresponding mounting plate 15, and the two L-shaped protective plates 6 are slightly away from the upper housing 2. After the connection is completed, the multiple limit screws 19 are all in a fully lowered state. At this time, the lower end face of the abutment block 20 is just flush with the upper end face of the corresponding limit screw 19. In the subsequent state of the L-shaped protective plate 6 moving back, the abutment block 20 can block the upper end face of the limit screw 19, so as to achieve self-locking after the limit screw 19 is connected. The use of guide rod 16 ensures that the limit screw 19 can only move vertically downwards, thus ensuring the connection. In addition, the use of multiple second springs 17 can act as spring washers after the multiple limit screws 19 are connected, further improving the stability after connection. After the connection is completed, the shielding of the two L-shaped protective plates 6 can also play a certain sealing role, thereby improving the service life of the connecting screw 18. Furthermore, the two L-shaped protective plates 6 are connected by a synchronization mechanism, which includes two transmission cavities 8 symmetrically opened between the inner walls of the upper housing 2. Each transmission cavity 8 is connected to two sliders 9. The opposite sides of the two mating sliders 9 are fixedly connected to racks 10. The front and rear inner walls of each transmission cavity 8 are rotatably connected to a rotating shaft 12. Each rotating shaft 12 is fixedly connected to a transmission gear 11. The two mating racks 10 are located above and below the corresponding transmission gear 11, respectively, and mesh with the corresponding transmission gear 11. The opposite sides of the two sliders 9 are elastically connected to the inner wall of the corresponding transmission cavity 8 through a first spring 13. The opposite sides of the two sliders 9 are fixedly connected to a connecting rod. The other end of each connecting rod passes through the inner wall of the corresponding transmission cavity 8 and is fixedly connected to the corresponding L-shaped protective plate 6. With this structure, by pulling the rectangular pull ring 7 on one side to move the L-shaped protective plate 6, the other L-shaped protective plate 6 can be moved in the opposite direction. Guide slots 14 are provided on the inner walls of the opposite sides of the two hidden slots 5. Guide plates 56 are fixedly connected to the opposite sides of the horizontal parts of the two L-shaped protective plates 6. The guide slots 14 are used to guide the L-shaped protective plates 6 to slide smoothly along the preset trajectory and limit their movement direction. With the guidance of multiple connecting rods, the overall stability of the movement is stronger.

[0028] In this invention, during assembly, the circuit breaker assembly is placed inside the lower housing 1, and then the upper housing 2 is aligned with the lower housing 1 so that the positioning post 3 at the lower end of the upper housing 2 and the positioning seat 4 at the upper end of the lower housing 1 are precisely engaged. Holding one side of the rectangular pull ring 7 drives the corresponding L-shaped protective plate 6 to move. The L-shaped protective plate 6 drives the corresponding slider 9 to move through the connecting rod. The rack 10 on the slider 9 drives the transmission gear 11 to rotate. The transmission gear 11 then drives the rack 10 and slider 9 on the other side to move in the opposite direction and compresses multiple first springs 13. In turn, the connecting rod drives the other side of the L-shaped protective plate 6 to move in the opposite direction, so as to realize the synchronous opening and closing of the two L-shaped protective plates 6. Then, using an external tool, the limiting screw 19 is rotated so that it passes through the round opening 18 and is threaded into the threaded hole on the lower housing 1. During this process, the guide rod 16 ensures that the limiting screw 19 can only move vertically downwards, ensuring the accuracy of the connection. As the limiting screw 19 moves downwards, the mounting plate 15 moves downwards synchronously and compresses the second spring 17 until the limiting screw 19 is fully screwed into the threaded hole. At this point, all the limiting screws 19 are in the fully downward-moving state, and the second spring 17 is in the compressed state, acting like a spring washer to further improve the stability after connection.

[0029] After the connection is completed, the rectangular pull ring 7 is released. Under the elastic action of multiple first springs 13, multiple sliders 9 move back. The lower end face of the abutment block 20 is just flush with the upper end face of the corresponding limit screw 19. At this time, the L-shaped protective plates 6 on both sides move in opposite directions (move back) to block the connection between the lower housing 1 and the upper housing 2, and at the same time achieve a certain sealing effect, reducing the possibility of the screw being corroded by external environmental factors, improving the service life of the limit screw 19, and the abutment block 20 can block the upper end face of the limit screw 19 to achieve self-locking after the limit screw 19 is connected.

[0030] Reference Figures 6-13 The present invention also discloses an assembly equipment for molded case circuit breakers, used to assemble the above-mentioned circuit breakers. Its core advantage lies in realizing the automated and precise assembly of circuit breakers, reducing manual intervention, reducing assembly damage, and improving assembly efficiency and pass rate. It includes a base 21, which serves as the installation foundation of the entire equipment and provides stable support for each component. A lifting plate 42 is provided on the upper end of its rear part. Multiple rotating shafts 46 are rotatably connected to the lower end of the lifting plate 42. Each rotating shaft 46 is fixedly connected to the lower end of a rotating nail 44. The multiple rotating nails 44 cooperate with multiple limit screws 19 respectively, which can accurately align with the drive slots of the limit screws 19 to realize the tightening and assembly of the screws. In this system, multiple rotating nails 44 move downwards and rotate synchronously through a drive mechanism, ensuring that all limit screws 19 are assembled synchronously, guaranteeing assembly consistency, and preventing the direct tightening of a single limit screw 19 from affecting the tightening operation of subsequent limit screws 19. The drive mechanism includes a mounting bracket 33 fixedly connected to the upper rear side of the base 21. An adjusting seat 34 is fixedly connected to the rear side of the mounting bracket 33. A lifting groove 36 is opened on the front side of the adjusting seat 34. A second threaded rod 37 is rotatably connected between the upper and lower inner walls of the lifting groove 36. A sliding seat 41 is threadedly connected to the second threaded rod 37. The sliding seat 41 is slidably connected to the inner wall of the lifting groove 36. The lifting groove 36 provides precise guidance for the lifting of the sliding seat 41, restricts the horizontal displacement of the sliding seat 41, and prevents it from deviating or jamming during the lifting process, ensuring that the rotating nails 44 can be accurately aligned with the limit screws 19. The second threaded rod 37 provides power transmission for the lifting of the sliding seat 41. The threaded transmission method has the advantages of smooth transmission and high lifting accuracy, and can accurately control the downward movement distance of the rotating nails 44. The front side of the sliding seat 41 is fixedly connected to the lifting plate 42. The lifting plate 42 is driven to rise and fall synchronously by the lifting of the sliding seat 41, which in turn drives the rotating nail 44 to move up and down, so as to achieve precise docking and assembly feed between the rotating nail 44 and the limit screw 19. The front side of the adjusting seat 34 is fixedly connected to the crossbeam 35. The upper end of the crossbeam 35 is equipped with a second motor 39. The second motor 39 serves as a drive source to provide sufficient power for the rotation and lifting of the rotating nail 44. It adopts a forward and reverse controllable design, which can flexibly adjust the rotation direction and speed according to the assembly requirements. The output shaft of the second motor 39 is connected to the second threaded rod 37 through the transmission component 38. The lower end of the lifting plate 42 is rotatably connected to the rotating tube 48. The rotation here is achieved by bearings. The rotating tube 48 plays the role of power transmission and positioning. It can rise and fall synchronously with the lifting plate 42, and can also rotate flexibly itself. A drive gear 49 is mounted on the rotating tube 48. The drive gear 49 and the rotating tube 48 are rotatably connected via a one-way bearing. The one-way bearing enables unidirectional power transmission, transmitting power only when the rotating pin 44 is moving downwards for assembly. After assembly, when the rotating pin 44 moves upwards, the drive gear 49 and the rotating tube 48 rotate relative to each other, preventing the rotating pin 44 from reversing and causing the limit screw 19 to loosen, thus ensuring assembly quality. Each rotating shaft 46 has a driven gear 47 fixedly connected to its outer side, meshing with the drive gear 49. Through the meshing of the drive gear 49 and the driven gear 47, the synchronous rotation of multiple rotating shafts 46 is achieved, ensuring that all rotating pins 44 rotate at the same speed. To ensure uniform tightening force of multiple limit screws 19 and improve assembly consistency, the lower end of the output shaft of the second motor 39 passes through the rotating tube 48. Rectangular limit grooves 60 are provided on both sides of the output shaft of the second motor 39. Two rectangular limit strips 61 are symmetrically fixedly connected to the inner side of the rotating tube 48. The inner side of the two rectangular limit strips 61 extends into the corresponding rectangular limit grooves 60. The rectangular limit grooves 60 and the rectangular limit strips 61 cooperate to play a circumferential limit role, ensuring that the rotating tube 48 can rotate synchronously with the output shaft of the second motor 39, while not affecting the up and down movement of the rotating tube 48 with the lifting plate 42, so as to realize the coordinated operation of rotation and lifting. Furthermore, the transmission assembly 38 includes two synchronous pulleys, which are respectively mounted on the output shaft of the second motor 39 and the second threaded rod 37. The two synchronous pulleys are connected by a synchronous belt drive. The transmission assembly 38 realizes stable power transmission, ensuring that the power of the second motor 39 is synchronously transmitted to the second threaded rod 37 and the rotating tube 48, and ensuring coordinated lifting and rotating actions.

[0031] In addition, the rotating pin 44 continues to rotate and moves downward synchronously. When its bottom end contacts the outer wall of the limiting screw 19, the rotational motion generates a slight circumferential adjustment force. This slight circumferential adjustment force can automatically correct the angular deviation between the rotating pin 44 and the driving groove of the limiting screw 19 without manual intervention for alignment. At the same time, the downward stroke compresses the first spring 13, which generates a reverse elastic support force to buffer the hard squeezing collision, effectively avoiding the impact force generated when the rotating pin 44 contacts the limiting screw 19, preventing collision damage between the two and protecting the integrity of the parts. By relying on the circumferential rotation of the rotating nail 44 for fine adjustment, combined with the flexible elastic compensation of the first spring 13, it can adaptively match the angle deviation and smoothly and accurately fit into the drive groove of the limit screw 19 without bumps or damage, achieving automatic alignment and engagement. This causes the drive limit screw 19 to move down and rotate for assembly operations. This design greatly improves the accuracy and efficiency of alignment, reduces assembly failures caused by alignment deviations, and reduces part wear and production costs. In other words, by using the first spring 13 in conjunction with the entire assembly equipment, an operation logic of automatic alignment before connection is adopted, which reduces the defective product yield.

[0032] This includes a shifting mechanism that allows the two rectangular pull rings 7 on the circuit breaker housing to move in opposite directions during the downward movement of the lifting plate 42. This prevents the two L-shaped protective plates 6 from interfering with the assembly process, solving the problem of the L-shaped protective plates 6 obstructing the assembly area and affecting the operation of the rotating nails 44 during assembly. This ensures smooth assembly. The shifting mechanism includes a fixed plate 40 fixedly connected to one side of the adjusting seat 34. The fixed plate 40 has a guide groove 45, which consists of two vertical sections and one inclined section. The special structure of the guide groove 45 controls the movement trajectory of the abutment rod 55, enabling the abutment rod 55 to drive the sliding plate 53 to move laterally when the lifting plate 42 moves downward, thereby driving the rectangular pull rings 7 to move. The structural design is simple, requires no additional power source, and reduces equipment costs. Specifically, for example... Figure 10 As shown, in the initial high position, the abutment rod 55 is located at the upper vertical end. As the lifting plate 42 moves down, when the abutment rod 55 moves down to the inclined section, it will slide along the inclined section after continuing to move down. When it continues to move down, it will pass through the lower vertical section again. When the abutment rod 55 passes through the inclined section, it will be guided and move to the left. Figure 10 (From the perspective) Furthermore, the lifting plate 42 has a sliding cavity 52 inside, and a sliding plate 53 is slidably connected inside the sliding cavity 52. ​​The sliding cavity 52 provides installation and sliding space for the sliding plate 53, restricts the movement direction of the sliding plate 53, and ensures that it can only slide smoothly laterally. A strip-shaped opening 54 is opened on the rear side wall of the sliding cavity 52. ​​An abutment rod 55 is fixedly connected to the rear side of the lifting plate 42. The rear end of the abutment rod 55 passes through the strip-shaped opening 54 and extends into the guide groove 45. The strip-shaped opening 54 provides movement space for the abutment rod 55, allowing the abutment rod 55 to move laterally while moving up and down with the lifting plate 42, thereby driving the sliding plate 53 to move. Two connecting strips 50 are symmetrically fixedly connected to one side of the sliding plate 53. The other end of each connecting strip 50 penetrates the corresponding inner wall of the sliding cavity 52. ​​The lower side of the end of each connecting strip 50 away from the sliding plate 53 is fixedly connected to a moving rod 51. The connecting strip 50 is used to connect the sliding plate 53 and the moving rod 51, and synchronously transmits the lateral movement of the sliding plate 53 to the two moving rods 51, ensuring that the two moving rods 51 move synchronously. The lower end of each moving rod 51 is engaged with the corresponding rectangular pull ring 7. The initial lower end position of the moving rod 51 is lower than the rotating nail 44. This design ensures that before the rotating nail 44 contacts the limiting screw 19, the moving rod 51 drives the rectangular pull ring 7 to move first, and removes the L-shaped protective plate 6 in advance, avoiding interference from the protective plate to the assembly and ensuring that the assembly process proceeds in an orderly manner.

[0033] The system also includes a loading and unloading mechanism, which enables continuous automated assembly of the circuit breaker housing. This mechanism automates the entire process of loading, assembling, and unloading, significantly reducing manual labor, improving assembly efficiency, and preventing damage to parts and assembly deviations caused by manual loading and unloading. It also allows for continuous production to meet batch assembly requirements. The loading and unloading mechanism includes a first loading conveyor 22 and a second loading conveyor 23, symmetrically fixed to the upper end of the base 21. The first loading conveyor 22 and the second loading conveyor 23 are responsible for transporting the upper housing 2 and the lower housing 1 equipped with the circuit breaker assembly, respectively. This clear division of labor avoids confusion during loading and unloading and improves transport efficiency. An unloading conveyor 24 is located on the right side of the upper part of the base 21. A sliding groove 28 is provided at the upper middle part of the base 21. A first threaded rod 30 is slidably connected between the front and rear inner walls of the sliding groove 28. A sliding placement box 27 is threaded onto the first threaded rod 30. The initial position of 27 is at the front side. The first motor 29 is installed on the front side of the base 21. The output shaft of the first motor 29 extends into the sliding groove 28 and is fixedly connected to the front end of the first threaded rod 30. A six-axis robot 25 is installed on the ground. The six-axis robot 25 has a flexible movement trajectory and can accurately grasp the upper shell 2 and the lower shell 1 to realize automated feeding and assembly, replace manual operation, improve feeding accuracy and efficiency, and reduce manual labor intensity. The upper shell 2 is transported by the first feeding conveyor 22, and the lower shell 1 with the circuit breaker assembly is transported by the second feeding conveyor 23. Then, the six-axis robot 25 first places the lower shell 1 on the placement box 27, and then places the upper shell 2 on the upper end of the lower shell 1. The anti-displacement is achieved by the cooperation of multiple positioning columns 3 and positioning seats 4. Then, the first motor 29 is used to move the circuit breaker body to be assembled to the lower part of the lifting plate 42 for subsequent assembly operations. A controller 26 is installed on the upper end of the base 21. The controller 26 is electrically connected to the first feeding conveyor 22, the second feeding conveyor 23, the unloading conveyor 24, the six-axis robot 25, and the second motor 39. As the control core of the entire equipment, the controller 26 can realize the coordinated linkage of various mechanisms, accurately control the running rhythm and movement of each component, realize automated assembly, and monitor the equipment operating status in real time, so as to facilitate timely detection and handling of faults and improve the stability and reliability of equipment operation.

[0034] The system also includes a testing mechanism to automatically separate qualified and unqualified products without manual inspection, improving testing efficiency and accuracy, preventing unqualified products from entering subsequent processes, and ensuring product quality. The testing mechanism includes two vertical mounting strips 31 symmetrically fixed to the upper end of the base 21. Each vertical mounting strip 31 has a groove on its opposite side, and a wedge-shaped baffle 58 is slidably connected within each groove. The opposing sides of the two wedge-shaped baffles 58 are elastically connected to the inner wall of the corresponding groove via a third spring 57. The third spring 57 provides a reset force for the wedge-shaped baffles 58, ensuring they return to their initial position when not subjected to external force, thus guaranteeing the reliability and continuity of the testing. The inclined surfaces of both wedge-shaped baffles 58 face forward. The upper rear part of the base 21 has an inclined rearward separation groove 32. When the upper housing 2 and lower housing 1 are simply placed on the placement box 27, the circuit breaker body is in... Figure 1 In the current state, the two L-shaped protective plates 6 cannot move relative to each other to cover the hidden groove 5 because the abutment block 20 is blocked by the corresponding mounting plate 15. At this time, when the entire circuit breaker body moves backward, the rectangular pull ring 7 of the L-shaped protective plate 6 is in a protruding state, so it will abut against the two wedge baffles 58 to move in opposite directions. The wedge baffles 58 will not block the circuit breaker body from moving backward. After the subsequent multiple limit screws 19 are tightened, under the elastic action of multiple second springs 17, the L-shaped protective plate 6 can move back completely. That is, at this time the rectangular pull ring 7 is no longer in a protruding state. When it moves forward with the placement box 27, it will not contact the two wedge baffles 58, so that the assembled circuit breaker body can move to the front position and be picked up by the six-axis robot 25 and placed on the unloading conveyor 24. It should be noted that if an assembly error occurs during the tightening of multiple limit screws 19, i.e., due to factors such as problems with the threads of the limit screws 19, problems with the threads of the threaded groove, or incorrect settings in the assembly device program, the limit screws 19 will not be able to move down completely and will still obstruct the return movement of the abutment block 20. In this state, the rectangular pull ring 7 of the L-shaped protective plate 6 is in a protruding state. When the assembled circuit breaker body moves forward with the placement box 27, it will be blocked by the two wedge-shaped baffles 58 when passing the vertical mounting strip 31 and will eventually slide off the placement box 27, slide to the separation groove 32, and slide along the slope of the separation groove 32 to the defective area behind the subsequent base 21. Furthermore, since the circuit breaker housing has a synchronization mechanism, if one side is in a protruding state, the other side must also be in a protruding state. In this way, both sides will be abutted during the forward movement, and there will be no situation where one side is stuck due to force.

[0035] It also includes a limiting mechanism, which includes a rear stop bar 59 fixedly connected to the mounting bracket 33. The rear stop bar 59 is used to limit the rearward movement limit position of the circuit breaker body, ensuring that the circuit breaker body can accurately stop below the lifting plate 42, so that the rotating nail 44 can accurately align with the limiting screw 19. Two upper stop bars 43 are symmetrically fixedly connected to the front side of part of the rear stop bar 59. The upper stop bars 43 are used to limit the circuit breaker housing from moving up and down during the assembly process.

[0036] The working principle of this invention is as follows: After the equipment is started, the controller 26 controls the first feeding conveyor 22 and the second feeding conveyor 23 to run synchronously. The first feeding conveyor 22 transports the upper shell 2, and the second feeding conveyor 23 transports the lower shell 1 equipped with the circuit breaker assembly, thus completing the preparation for raw material transportation.

[0037] The six-axis robot arm 25 is activated, grabs the lower housing 1 from the second feeding conveyor 23, places it on the placement box 27, and then grabs the upper housing 2 from the first feeding conveyor 22 and places it on top of the lower housing 1. The positioning of the upper and lower housings is achieved by the cooperation of the positioning column 3 and the positioning seat 4.

[0038] The controller 26 controls the first motor 29 to start, and the first motor 29 drives the first threaded rod 30 to rotate, which drives the placement box 27 to move backward along the sliding groove 28 until the circuit breaker body touches the rear blocking bar 59. At this time, the circuit breaker body is precisely stopped below the lifting plate 42. The upper blocking bar 43 limits the circuit breaker housing to prevent it from moving up and down during the assembly process.

[0039] The controller 26 controls the second motor 39 to start. The second motor 39 drives the second threaded rod 37 and the rotating tube 48 to rotate simultaneously through the transmission component 38. The rotation of the second threaded rod 37 causes the sliding seat 41 to slide down along the lifting groove 36. The sliding seat 41 drives the lifting plate 42 to move down synchronously. The lifting plate 42 drives the rotating nail 44, the rotating shaft 46 and related components of the shifting mechanism to move down together.

[0040] During the downward movement of the lifting plate 42, the abutment rod 55 moves along the guide groove 45. Initially, the abutment rod 55 is located in the vertical section above the guide groove 45. When the two moving rods 51 in the shifting mechanism are inserted into the inner side of the rectangular pull ring 7 of the upper housing 2, the lifting plate 42 moves down to the inclined section. As it continues to move down, the abutment rod 55 moves laterally under the guidance, driving the sliding plate 53 to slide along the sliding cavity 52 through the strip-shaped opening 54. The sliding plate 53 drives the two moving rods 51 to move synchronously through the connecting strip 50. The moving rods 51 drive the corresponding rectangular pull ring 7 to move, thereby moving the L-shaped protective plate 6. The L-shaped protective plate 6 on the other side is moved by the synchronization mechanism of the upper housing 2 itself, avoiding the assembly part and avoiding interference with the operation of the rotating nail 44; the lifting plate 42 continues to move down, the rotating nail 44 continues to rotate and moves down synchronously. When its bottom end contacts the outer wall of the limit screw 19, the circumferential rotation of the rotating nail 44 generates a slight adjustment force, automatically correcting the angular deviation with the drive groove of the limit screw 19. At the same time, the downward stroke compresses the first spring 13, and the first spring 13 generates a reverse elastic support force to buffer the impact force when the rotating nail 44 contacts the limit screw 19, preventing the two from colliding and being damaged.

[0041] The rotating pin 44 is precisely engaged in the drive groove of the limit screw 19 through angle fine adjustment and elastic compensation. At this time, the driving gear 49 on the rotating tube 48 transmits power through the one-way bearing and meshes with the driven gear 47, driving multiple rotating shafts 46 to rotate synchronously, thereby driving multiple rotating pins 44 to rotate synchronously, realizing the synchronous tightening and assembly of all limit screws 19, ensuring assembly consistency and uniform tightening force.

[0042] After the limit screw 19 is assembled, the controller 26 controls the second motor 39 to reverse, and the second threaded rod 37 rotates in the opposite direction to drive the sliding seat 41 and the lifting plate 42 to reset upward. The rotating nail 44 moves upward accordingly. At this time, the one-way bearing causes the drive gear 49 to rotate relative to the rotating tube 48, preventing the rotating nail 44 from reversing and causing the limit screw 19 to loosen. At the same time, the abutment rod 55 resets along the guide groove 45, driving the components of the shifting mechanism to reset. The L-shaped protective plate 6 moves back to reset under the elastic action of the second spring 17.

[0043] The controller 26 controls the first motor 29 to reverse, driving the first threaded rod 30 to rotate in the opposite direction, causing the placement box 27 to move forward along the sliding groove 28. The circuit breaker body moves forward synchronously with the placement box 27, passing the vertical mounting strip 31 of the detection mechanism.

[0044] If the circuit breaker is assembled correctly, the limit screw 19 is fully tightened, the L-shaped protective plate 6 is fully moved back, the rectangular pull ring 7 does not protrude, the circuit breaker body does not contact the wedge baffle 58 when it moves forward, and it passes smoothly through the vertical mounting strip 31 until it moves to the designated position in front. The six-axis robot 25 grabs the qualified circuit breaker body and places it on the unloading conveyor 24, which completes the unloading.

[0045] If the circuit breaker is not assembled properly, the limit screw 19 is not fully tightened, which obstructs the return movement of the abutment block 20. The rectangular pull ring 7 of the L-shaped protective plate 6 remains protruding. When the circuit breaker body moves forward, it abuts the two wedge baffles 58, which move in opposite directions. Under the action of the third spring 57, the wedge baffles 58 block the circuit breaker body, causing the circuit breaker body to slide off the placement box 27 and slide along the separation groove 32 to the defective product area, thus achieving automatic separation of qualified and unqualified products.

[0046] The above steps are repeated cyclically, and the controller 26 controls the coordinated linkage of each mechanism in real time to realize the continuous automated assembly of the circuit breaker and complete the entire process of loading, assembly, testing and unloading.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A molded case circuit breaker, characterized in that, include: The circuit breaker housing and the circuit breaker assembly are located inside the circuit breaker housing. The circuit breaker housing includes a lower housing (1) and an upper housing (2). The lower end of the upper housing (2) is fixedly connected to a plurality of positioning posts (3). The upper end of the lower housing (1) is fixedly connected to a plurality of positioning seats (4) that cooperate with the positioning posts (3). Hidden grooves (5) are provided on both sides of the upper housing (2). L-shaped protective plates (6) are provided inside the two hidden grooves (5). Rectangular pull rings (7) are fixedly connected to the opposite sides of the two L-shaped protective plates (6). The connecting mechanism includes multiple threaded holes on the upper end of the lower housing (1), and two circular openings (18) coaxial with the threaded holes are opened at the bottom of the two hidden grooves (5). Each circular opening (18) is provided with a mounting plate (15) above it. Each mounting plate (15) is provided with a limiting screw (19) that cooperates with the circular opening (18) through the middle. Each limiting screw (19) is rotatably connected to the corresponding mounting plate (15) through a bearing. The lower end of each mounting plate (15) is elastically connected to the bottom of the hidden groove (5) through multiple second springs (17). Each mounting plate (15) is provided with a vertically slidable guide rod (16). The lower end of each guide rod (16) is elastically connected to the bottom of the hidden groove (5). Two abutment blocks (20) that cooperate with the limiting screws (19) are fixedly connected to the opposite sides of the vertical part of the two L-shaped protective plates (6). The two L-shaped protective plates (6) are connected by a synchronization mechanism.

2. A molded case circuit breaker according to claim 1, characterized in that, The synchronization mechanism includes two transmission cavities (8) symmetrically opened between the inner walls of the upper housing (2). Each transmission cavity (8) is connected to two sliders (9). The opposite sides of the two mating sliders (9) are fixedly connected to racks (10). A rotating shaft (12) is rotatably connected between the front and rear inner walls of each transmission cavity (8). A transmission gear (11) is fixedly connected to each rotating shaft (12). The two mating racks (10) are located above and below the corresponding transmission gear (11) respectively, and they mesh with the corresponding transmission gear (11). The opposite sides of the two sliders (9) are elastically connected to the inner wall of the corresponding transmission cavity (8) through a first spring (13). The opposite sides of the two sliders (9) are fixedly connected to a connecting rod. The other end of each connecting rod passes through the inner wall of the corresponding transmission cavity (8) and is fixedly connected to the corresponding L-shaped protective plate (6). Guide slots (14) are provided on the inner walls of the opposite sides of the two hidden grooves (5), and guide plates (56) are fixedly connected to the opposite sides of the horizontal parts of the two L-shaped protective plates (6).

3. An assembly apparatus for molded case circuit breakers, used for assembling the circuit breaker as described in any one of claims 1-2, characterized in that, include: The base (21) has a lifting plate (42) on the upper part of the rear side. The lower end of the lifting plate (42) is rotatably connected to multiple rotating shafts (46). The lower end of each rotating shaft (46) is fixedly connected to a rotating nail (44). The multiple rotating nails (44) cooperate with multiple limiting screws (19). The multiple rotating nails (44) move down and rotate synchronously through the driving mechanism. When the rotating nail (44) moves down and contacts the corresponding limiting screw (19), the downward rotation of the rotating nail (44) will cooperate with the elastic action of the first spring (13) to automatically and without damage align with the driving groove of the limiting screw (19), so that the driving limiting screw (19) moves down and rotates to perform the assembly operation. The shifting mechanism allows the two rectangular pull rings (7) on the circuit breaker housing to move in opposite directions during the downward movement of the lifting plate (42), thus avoiding interference from the two L-shaped protective plates (6) to the assembly. The loading and unloading mechanism enables continuous automated assembly of the circuit breaker housing.

4. The assembly equipment for a molded case circuit breaker according to claim 3, characterized in that, The drive mechanism includes a mounting bracket (33) fixedly connected to the upper rear side of the base (21). An adjustment seat (34) is fixedly connected to the rear side of the mounting bracket (33). A lifting groove (36) is provided on the front side of the adjustment seat (34). A second threaded rod (37) is rotatably connected between the upper and lower inner walls of the lifting groove (36). A sliding seat (41) is threadedly connected to the second threaded rod (37). The sliding seat (41) is slidably connected to the inner wall of the lifting groove (36). The front side of the sliding seat (41) is fixedly connected to the lifting plate (42).

5. The assembly equipment for a molded case circuit breaker according to claim 4, characterized in that, A crossbeam (35) is fixedly connected to the front side of the adjusting seat (34). A second motor (39) is installed at the upper end of the crossbeam (35). The output shaft of the second motor (39) is connected to the second threaded rod (37) through a transmission assembly (38). A rotating tube (48) is rotatably connected to the lower end of the lifting plate (42). A drive gear (49) is installed on the rotating tube (48). The drive gear (49) and the rotating tube (48) are rotatably connected through a one-way bearing. A driven gear (47) that meshes with the drive gear (49) is fixedly connected to the outer side of each rotating shaft (46). The lower end of the output shaft of the second motor (39) passes through the rotating tube (48). A rectangular limiting groove (60) is opened on both sides of the output shaft of the second motor (39). Two rectangular limiting strips (61) are symmetrically fixedly connected to the inner side of the rotating tube (48). The inner sides of the two rectangular limiting strips (61) extend into the corresponding rectangular limiting grooves (60).

6. The assembly equipment for a molded case circuit breaker according to claim 5, characterized in that, The transmission assembly (38) includes two synchronous pulleys, which are respectively mounted on the output shaft of the second motor (39) and the second threaded rod (37). The two synchronous pulleys are connected by a synchronous belt drive.

7. The assembly equipment for a molded case circuit breaker according to claim 4, characterized in that, The shifting mechanism includes a fixed plate (40) fixedly connected to one side of the adjusting seat (34), and a guide groove (45) is provided on the fixed plate (40). The guide groove (45) consists of two vertical sections and one inclined section. The lifting plate (42) is provided with a sliding cavity (52) inside. A sliding plate (53) is slidably connected inside the sliding cavity (52). A strip-shaped opening (54) is opened on the rear side wall of the sliding cavity (52). An abutment rod (55) is fixedly connected to the rear side of the lifting plate (42). The rear end of the abutment rod (55) passes through the strip-shaped opening (54) and extends into the guide groove (45). Two connecting strips (50) are symmetrically fixedly connected to one side of the sliding plate (53). The other end of the two connecting strips (50) passes through the corresponding inner wall of the sliding cavity (52). A moving rod (51) is fixedly connected to the lower side of the end of the two connecting strips (50) away from the sliding plate (53). The lower end of each moving rod (51) is engaged with the corresponding rectangular pull ring (7).

8. The assembly equipment for a molded case circuit breaker according to claim 5, characterized in that, The loading and unloading mechanism includes a first loading conveyor (22) and a second loading conveyor (23) that are symmetrically fixedly connected to the upper end of the base (21). A unloading conveyor (24) is provided on the right side of the upper part of the base (21). A sliding groove (28) is provided at the upper middle part of the base (21). A first threaded rod (30) is slidably connected between the front and rear inner walls of the sliding groove (28). A placement box (27) that can slide back and forth is threadedly connected to the first threaded rod (30). A first motor (29) is installed on the front side of the base (21). The output shaft of the first motor (29) extends into the sliding groove (28) and is fixedly connected to the front end of the first threaded rod (30). A six-axis robot (25) is installed on the ground. A controller (26) is installed on the upper end of the base (21). The controller (26) is electrically connected to the first feeding conveyor (22), the second feeding conveyor (23), the unloading conveyor (24), the six-axis robot (25), and the second motor (39).

9. The assembly equipment for a molded case circuit breaker according to claim 8, characterized in that, It also includes a testing mechanism, which includes two vertical mounting strips (31) symmetrically fixedly connected to the upper end of the base (21). The two vertical mounting strips (31) are provided with grooves on opposite sides. Wedge-shaped baffles (58) are slidably connected in the two grooves. The opposite sides of the two wedge-shaped baffles (58) are elastically connected to the inner wall of the corresponding groove through a third spring (57). The inclined surfaces of the two wedge-shaped baffles (58) face forward. The upper end of the rear part of the base (21) is provided with a rearward inclined separation groove (32).

10. The assembly equipment for a molded case circuit breaker according to claim 3, characterized in that, It also includes a limiting mechanism, which includes a rear blocking strip (59) fixedly connected to the mounting bracket (33), and two upper blocking strips (43) are symmetrically fixedly connected to the front side of a portion of the rear blocking strip (59).

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