Energy-saving electromagnetic switch

Abstract

The application relates to the technical field of electromagnetic switches, in particular to an energy-saving electromagnetic switch which comprises a lower shell, an upper shell and a connecting plate, the lower shell is fixedly connected with the connecting plate, the upper shell is detachably connected with the connecting plate through a bolt piece; an inner side wall of the upper shell is provided with an empty groove, and a linkage contact piece is arranged in the empty groove; the linkage contact piece comprises a sliding rod arranged in the empty groove and a connecting block one which is hingedly connected with the sliding rod through a connecting rod two; the connecting block one is provided with a scraping plate close to the inner side of the upper shell; the scraping plate comprises a square part, a circular ring part connected with the square part, an empty ring part arranged in the middle of the circular ring part and a ring blade part arranged at the edge of the empty ring part; the energy-saving electromagnetic switch is characterized in that the linkage contact piece is arranged in the empty groove, the sliding rod, the connecting rod two and the connecting block one form a hinged linkage structure, linkage adjustment can be completed synchronously with the on-off action of the switch, the scraping plate moves synchronously with the connecting block one, and the sintering residues and the raised defects on the surface of the contact can be cleaned.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic switch technology, specifically to an energy-saving electromagnetic switch. Background Technology

[0002] Electromagnetic switches, as core components for circuit on / off control, are widely used in various electrical control, electromechanical equipment, and high-current load control systems. The overall working principle relies on the contact and separation of internal moving and stationary contacts to close and open the circuit loop, thereby enabling the start-up, shutdown, and control of electrical equipment. Currently, conventional electromagnetic switches on the market have mature structural designs that can meet basic circuit control requirements. However, in long-term, frequent power-on / off and high-current operating scenarios, the overall operational stability and lifespan of these devices have significant shortcomings, making them unsuitable for long-term, high-precision, and high-reliability applications.

[0003] During the operation of electromagnetic switches, including power switching and control circuit opening and closing, the instantaneous contact and separation of the moving and stationary contacts are the main operational points that can lead to equipment failure. At the instant the contacts are about to close or separate, due to the limitations of the microscopic flatness of the contact surface, the actual effective contact area between the contacts is small. This results in an extremely high current density during circuit operation, causing ionization of the air in the contact gap and generating a high-temperature electric arc. The instantaneous temperature generated by this arc can reach thousands of degrees Celsius. This extremely high temperature can directly burn the contact surface, causing localized melting of the metal material on the contact surface.

[0004] When the circuit is continuously energized, the molten contact metal will adhere tightly under the action of electromagnetic pressure. After the arc disappears and the equipment temperature cools down, the molten metal will solidify to form a solid welding melting point, causing the originally separable moving contact and stationary contact to become locally stuck together.

[0005] For example, Chinese patent application number 202510124863.8 discloses a combined energy-saving electromagnetic switch that suffers from the aforementioned problems. As the frequency of switching on and off of the electromagnetic switch increases, the sintered solder joints on the contact surface will continue to accumulate and gradually increase, and the degree of contact adhesion will continue to intensify. Eventually, the moving contact and the stationary contact cannot be separated normally, and the circuit loop cannot complete the disconnection operation according to the control command. This directly causes the electromagnetic switch to malfunction, leading to safety hazards such as equipment control failure and abnormal circuit conduction.

[0006] In addition, the solder joints and micro-protrusions formed on the contact surface due to high-temperature sintering will further exacerbate the current concentration and heat generation problems during subsequent switching operations, creating a vicious cycle. The uneven contact surface will increase the contact resistance of the switch, which will not only cause unnecessary power loss and fail to meet the requirements of energy-saving operation, but will also continuously aggravate contact erosion, wear and sintering, significantly shortening the maintenance cycle and overall service life of the electromagnetic switch, increasing the operation and maintenance costs and failure risks of the equipment. The existing structural design of conventional electromagnetic switches cannot effectively solve the various technical defects caused by the high-temperature sintering and adhesion of the contacts.

[0007] Therefore, an energy-saving electromagnetic switch is proposed. Summary of the Invention

[0008] One of the technical problems that this application aims to solve is that: under the conditions of frequent switching and high current operation, conventional electromagnetic switches are prone to generating high-temperature arcs at the moment of contact opening and closing, which causes metal melting and sintering, resulting in adhesion between moving and stationary contacts and failure of circuit opening and closing. At the same time, sintering defects on the contact surface will increase contact resistance, increase energy consumption and aggravate contact wear, resulting in poor equipment operation stability and service life.

[0009] To address the aforementioned technical problems, this application provides an energy-saving electromagnetic switch, comprising a lower housing, an upper housing, and a connecting plate. The lower housing and the connecting plate are fixedly connected, while the upper housing and the connecting plate are detachably connected by bolts. A slot is provided on the inner side wall of the upper housing, and a linkage contact is provided within the slot. The linkage contact includes a sliding rod and a connecting block 1 disposed within the slot. The connecting block 1 and the sliding rod are hinged together by a connecting rod 2. A scraping plate is provided on the side of the connecting block 1 near the inner core of the upper housing. The scraping plate includes a square portion, an annular portion connected to the square portion, a hollow portion disposed in the middle of the annular portion, and a ring blade portion disposed at the edge of the hollow portion.

[0010] In some embodiments, the lower housing is provided with a wire frame and a winding assembly wound on the wire frame; the wire frame is hollow in the middle and a moving iron core is provided on one side of the middle of the wire frame.

[0011] In some embodiments, a stationary iron core is provided on the other side of the middle of the wire frame; a first central shaft is provided in the middle of the moving iron core and the stationary iron core, and the moving iron core and the stationary iron core do not contact each other in the initial state.

[0012] In some embodiments, a spring is provided on the first central shaft, a hole is provided in the middle of the connecting plate for the first central shaft to pass through, and a spring is fixedly provided at the top of the first central shaft.

[0013] In some embodiments, the other end of the spring three is fixedly connected to the bottom of the second central shaft, a support plate is provided at the top of the second central shaft, movable contacts are provided on both sides of the support plate, a protrusion two is provided in the middle of the support plate, and an outer sleeve is provided at the connection between the bottom of the second central shaft and the spring three.

[0014] In some embodiments, the first central shaft moves within the outer sleeve plate; connecting rods are fixedly provided on both sides of the support plate; a connecting hole is provided at the end of the upper housing, a bolt is provided in the connecting hole, a nut is provided on the outside of the bolt, and a stationary contact is provided on the inside of the bolt; a protrusion is provided in the middle of the end of the upper housing, a space is provided inside the protrusion, the space is located on the upper housing, a spring is provided in the space, and the size of the protrusion matches the size of the space; a connecting hole is provided on the connecting plate, a connecting hole is provided on the lower housing, and the size of the connecting hole matches the size of the connecting hole and the bolt.

[0015] In some embodiments, the slot is an F-shaped structure that rotates 90 degrees clockwise; a sliding rod is disposed in the slot, one end of the sliding rod abuts against the end wall of the slot, and the other end is fixedly connected to a spring four; the other end of the spring four is fixedly connected to the end wall on the other side of the slot.

[0016] In some embodiments, a side plate is provided on the inner side of the sliding rod, a connecting shaft is provided between the two side plates, and one end of the connecting rod is rotatably connected to the connecting shaft.

[0017] In some embodiments, a connecting block 1 is disposed in the slot near the four sides of the spring, a side plate 2 is disposed near the sliding rod side of the connecting block 1, and a connecting shaft 2 is disposed between the two side plates 2. The other end of the connecting rod is rotatably connected to the connecting shaft, and the end of the sliding rod is fixedly connected to the slot. A limit block is provided in the slot at the projection of the inner side of the sliding rod and the direction of movement of the connecting block to limit the position of the connecting rod.

[0018] In some embodiments, the size of the hollow portion of the scraper matches the moving contact, and the scraper is set close to the stationary contact. In the initial state, the center of the hollow portion is not concentric with the center of the stationary contact.

[0019] This invention has at least the following beneficial effects: 1. The hollow slot is equipped with a linkage contact component. The sliding rod, connecting rod two, and connecting block one form a hinged linkage structure, which can synchronously complete the linkage adjustment according to the on and off action of the switch. The scraping plate moves synchronously with connecting block one. Relying on the overall structure of the square part, the circular part, and the hollow part, it achieves a close fit with the stationary contact and the moving contact. In the initial state, the hollow part and the stationary contact are eccentrically set, allowing the ring blade to fully slide against the contact surface during the switch reset process.

[0020] 2. In this device, the lower housing and connecting plate are fixedly installed, while the upper housing and connecting plate are detachably connected by bolts. The overall assembly structure is simple and neat, facilitating equipment assembly, disassembly, and subsequent maintenance. This effectively reduces equipment operation and maintenance costs and ensures long-term stable operation of the electromagnetic switch. The wire frame and winding assembly constitute the core structure of the electromagnetic drive. Automated on / off control of the switch is achieved through the magnetic attraction between the moving and stationary iron cores. Combined with the elastic reset structure of springs one, two, three, and four, the smooth reciprocating motion of the entire transmission structure is ensured, preventing switch malfunctions caused by transmission jamming and improving the accuracy and sensitivity of the switch's on / off response.

[0021] 3. The device achieves step-by-step power transmission through the first and second central shafts. Under the limiting and guiding effect of the outer sleeve plate, the movement trajectory of the first central shaft is precisely limited, effectively avoiding component offset and misalignment during transmission, ensuring the stability of the movement path of the support plate and moving contact, making the contact between the moving contact and the stationary contact more regular and uniform, reducing the phenomenon of excessive local force and local current concentration at the contact, and reducing the probability of high-temperature sintering of the contact from the structural level.

[0022] 4. During the reciprocating working cycle of energizing and closing the winding assembly and resetting it upon de-energizing, the ring blade can continuously scrape and grind the molten solder joints and metal micro-protrusions on the contact surfaces of the stationary and moving contacts caused by the high-temperature electric arc and Joule heating effect. This promptly cleans the sintering residues and protrusion defects on the contact surface, preventing the molten metal from forming hard adhesions after cooling. This solves the problem of molten solder adhesions and the inability to disconnect the circuit properly in traditional electromagnetic switches, ensuring the working stability of the electromagnetic switch under frequent on / off conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 for Figure 2 Sectional view of AA in the middle; Figure 4 for Figure 3 Enlarged view at point B in the middle; Figure 5 for Figure 3 Enlarged view at point C; Figure 6 This is a schematic diagram of the scraping plate structure of the present invention.

[0024] In the diagram, 100-lower housing; 101-wire frame; 102-winding assembly; 103-moving iron core; 104-stationary iron core; 105-first central shaft; 106-spring one; 107-connecting hole one; 200-upper housing; 201-bolt one; 202-nut; 203-protrusion one; 204-space one; 205-spring two; 206-connecting hole two; 207-stationary contact; 208-second central shaft; 209-outer plate; 210-spring three; 211-slot; 212- Support plate; 213-Protrusion 2; 214-Moving contact; 215-Sliding rod; 216-Spring 4; 217-Side plate 1; 218-Connecting shaft 1; 219-Connecting block 1; 220-Limiting block; 221-Connecting rod 1; 222-Side plate 2; 223-Connecting shaft 2; 224-Connecting rod 2; 225-Scraping plate; 226-Ring blade; 227-Circular ring; 228-Square section; 229-Hollow ring; 300-Connecting plate; 301-Connecting hole 3; 400-Bolt. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1, see Figures 1-6 The present invention provides a technical solution: an energy-saving electromagnetic switch, comprising a lower housing 100, an upper housing 200, and a connecting plate 300. The lower housing 100 and the connecting plate 300 are fixedly connected, and the upper housing 200 and the connecting plate 300 are detachably connected by bolts 400. A slot 211 is provided on the inner side wall of the upper housing 200, and a linkage contact is provided in the slot 211. The linkage contact includes a sliding rod 215 and a connecting block 219 disposed in the slot 211. The connecting block 219 and the sliding rod 215 are hingedly connected by a connecting rod 224. A scraping plate 225 is provided on the side of the connecting block 219 near the inner side of the upper housing 200. The scraping plate 225 includes a square portion 228, a circular portion 227 connected to the square portion 228, a hollow portion 229 disposed in the middle of the circular portion 227, and a ring blade portion 226 disposed on the edge of the hollow portion 229.

[0027] Specifically, this electromagnetic switch adopts a split assembly structure consisting of a lower housing 100, an upper housing 200, and a connecting plate 300. The lower housing 100 and the connecting plate 300 are fixedly connected to form an integral base structure, which ensures the stability of the installation position of the lower electromagnetic drive components and provides a stable installation benchmark for the internal transmission and magnetic attraction structures. This prevents the lower structure from loosening or shifting during long-term operation and ensures the accuracy of the electromagnetic drive action. The upper housing 200 and the connecting plate 300 are detachably connected by bolts 400, changing the traditional one-piece enclosed housing structure. This allows for quick disassembly of the upper housing 200 when equipment malfunctions, contacts wear, or internal dust accumulates. This facilitates the inspection, maintenance, and replacement of the contact components and linkage structure inside the housing, effectively reducing the overall operation and maintenance difficulty and cost of the equipment. At the same time, this assembly structure ensures the overall sealing and structural strength of the assembled equipment, preventing external impurities from entering the housing and affecting the normal operation of the components.

[0028] The slot 211 formed on the inner wall of the upper housing 200 provides dedicated installation and movement space for the internal linkage contact components. It limits the position of moving parts such as the sliding rod 215 and connecting block 219, constraining the overall movement trajectory of the linkage contact components and preventing offset, wobbling, or misalignment during reciprocating motion, thus ensuring the stability and continuity of the overall linkage action. The slot 211 is formed based on the inner wall of the upper housing 200, resulting in a high degree of structural integration. No additional fixed supports are required, simplifying the internal structure and reducing the overall size of the equipment. This also reduces assembly errors and operational malfunctions caused by redundant parts, improving the overall compactness of the equipment structure.

[0029] The sliding rod 215 assembled inside the slot 211 and the connecting block 219 form a hinged connection structure through the connecting rod 224. This hinged transmission method is adapted to the reciprocating on / off working characteristics of the electromagnetic switch, and can convert the linear displacement of the switch transmission component into the fine-tuning displacement of the connecting block 219, realizing a flexible transition of transmission action. Compared with the rigid direct transmission structure, the hinged connection method can buffer the mechanical impact force during the transmission process, reduce the hard friction and collision loss between components, reduce the wear and aging rate of components, effectively extend the service life of each linkage component, and at the same time, it can accommodate the small displacement deviation during the contact closing and opening process, ensuring the precise contact engagement and disengagement action.

[0030] The scraper 225, which is fixed to the side of the connecting block 219 near the inner part of the upper housing 200, is the core structure for improving the problem of high-temperature sintering and adhesion of the contacts. The scraper 225 adopts a split-type one-piece molding structure, and is stably assembled and fixed to the connecting block 219 through the square part 228. This ensures that the scraper 225 will not loosen, fall off, or shift during the movement of the connecting block 219, thus ensuring the synchronization of the overall movement. The circular part 227, as an intermediate connecting structure, can bear the fixing force of the square part 228, and at the same time provide stable structural support for the central hollow part 229 and the edge ring blade part 226, improving the overall structural strength and avoiding structural deformation and breakage due to long-term reciprocating scraping operations.

[0031] The structural dimensions of the hollow ring portion 229 are adapted to the shape of the contact structure, allowing it to be stably fitted onto the outside of the contact when the contact is closed. This ensures precise alignment and contact between the scraper plate 225 and the contact, providing a positioning basis for the scraping operation of the edge ring blade portion 226 and guaranteeing the accuracy of the scraping position. The ring blade portion 226, formed by the edge of the hollow ring portion 229, can follow the reciprocating movement of the connecting block 219 and the scraper plate 225, continuously scraping and polishing the solder joints and micro-protrusions formed on the contact surfaces of the moving and stationary contacts due to high-temperature arcs and the solidification of molten metal. This promptly cleans sintering defects on the contact surface, preventing metal adhesion during long-term operation and ensuring the contacts can normally complete separation and closure actions, thus eliminating circuit opening and closing failures.

[0032] This series of structures works in tandem, enabling automatic cleaning and trimming of the contact surfaces through the reciprocating motion of the device itself, without adding additional drive structures or altering the original switching logic of the electromagnetic switch. This continuously ensures a smooth and flat contact surface, effectively reducing contact resistance, minimizing ineffective heat generation and energy loss during operation, and improving energy efficiency. Simultaneously, it addresses the industry-wide problem of high-temperature contact sintering and adhesion, significantly enhancing the operational stability and reliability of the electromagnetic switch under high-current, high-frequency switching conditions, reducing equipment failure probability and maintenance costs, and substantially extending the overall service life of the equipment.

[0033] Example 2, see Figure 1-6 The lower housing 100 contains a wire frame 101 and a winding assembly 102 wound on the wire frame 101; the wire frame 101 is hollow in the middle, and a moving iron core 103 is provided on one side of the middle of the wire frame 101. 3. An energy-saving electromagnetic switch according to claim 2, characterized in that: a stationary iron core 104 is provided on the other side of the middle of the wire frame 101; a first central shaft 105 is provided in the middle of the moving iron core 103 and the stationary iron core 104, and the moving iron core 103 and the stationary iron core 104 do not contact each other in the initial state.

[0034] A spring 106 is provided on the first central shaft 105. A hole for the first central shaft 105 to pass through is provided in the middle of the connecting plate 300. A spring 210 is fixedly provided at the top of the first central shaft 105. The other end of the spring 210 is fixedly connected to the bottom of the second central shaft 208. A support plate 212 is provided at the top of the second central shaft 208. Moving contacts 214 are provided on both sides of the support plate 212. A protrusion 213 is provided in the middle of the support plate 212. An outer sleeve plate 209 is provided at the connection between the bottom of the second central shaft 208 and the spring 210.

[0035] The first central shaft 105 moves within the outer sleeve plate 209; connecting rod 221 is fixedly installed on both sides of the support plate 212; a connecting hole 206 is provided at the end of the upper housing 200, a bolt 201 is provided in the connecting hole 206, a nut 202 is provided on the outside of the bolt 201, and a stationary contact 207 is provided on the inside of the bolt 201; a protrusion 203 is provided in the middle of the end of the upper housing 200, a space 204 is provided on the inside of the protrusion 203, the space 204 is located on the upper housing 200, a spring 205 is provided in the space 204, and the size of the protrusion 213 matches that of the space 204; a connecting hole 301 is provided on the connecting plate 300, and a connecting hole 107 is provided on the lower housing 100, the size of the connecting hole 301 matches that of the connecting hole 107 and the bolt 400.

[0036] Specifically, the wire frame 101 and the winding assembly 102 arranged inside the lower housing 100 constitute the main electromagnetic drive structure of the equipment. The wire frame 101 adopts a hollow structure in the middle, which can reserve reasonable assembly and movement space for the internal magnetic attraction movement structure, ensuring the alignment and installation accuracy of the moving iron core 103 and the stationary iron core 104. The winding assembly 102 is neatly wound on the outside of the wire frame 101, which can form a stable and uniform electromagnetic field after energization, providing a continuous and reliable electromagnetic driving force for the entire switch on and off action, ensuring the consistency of the switch action response. The moving iron core 103 and the stationary iron core 104 are arranged on both sides of the wire frame 101 respectively. In the initial state, the moving iron core 103 and the stationary iron core 104 are separated and do not contact each other, which can keep the equipment in a stable disconnected state when the power is off, avoiding the situation of accidental engagement or mis-engagement, and ensuring the safety of circuit control.

[0037] The first central shaft 105, which runs through the middle of the moving iron core 103 and the stationary iron core 104, serves as the core transmission rod, undertaking the function of transmitting electromagnetic attraction force and power output. The spring 106 mounted on the outside of the first central shaft 105 can be compressed and store elastic potential energy during the power-on and attraction process of the equipment. After the equipment is de-energized, the elastic potential energy is released, driving the overall transmission structure to reset, realizing the automatic disconnection action of the switch, and ensuring the automatic completion of the switch on and off cycle. The connecting plate 300 has a through hole structure in the middle for the first central shaft 105 to pass through, which can play a radial limiting role in the reciprocating movement of the first central shaft 105, limiting the swing deviation of the first central shaft 105 during operation, ensuring the straightness of the transmission, and reducing the probability of transmission jamming.

[0038] The spring 210, fixedly mounted at the top of the first central shaft 105, enables a flexible connection and transmission between the first central shaft 105 and the second central shaft 208. Compared to a rigid direct connection, the spring 210 can buffer the instantaneous impact force during electromagnetic engagement, weaken the hard collision between the upper and lower transmission structures, reduce component wear and fatigue, and improve the stability of the structure's operation. The outer sleeve 209, fitted onto the bottom outer side of the second central shaft 208, further constrains the movement trajectory of the first central shaft 105, ensuring that the first central shaft 105 can only move axially along the internal space of the outer sleeve 209. This further improves transmission accuracy and avoids contact misalignment caused by component displacement during long-term reciprocating motion.

[0039] The support plate 212 mounted on the top of the second central shaft 208 serves as the contact mounting carrier and can synchronously complete the lifting and reciprocating motion with the second central shaft 208. The moving contacts 214 arranged on both sides of the support plate 212 can move synchronously with the support plate 212 to achieve contact and separation with the stationary contacts 207, thus completing the opening and closing control of the circuit loop. The second protrusion 213 set in the middle of the support plate 212 matches the structural dimensions of the first space 204 inside the upper housing 200. The second spring 205 arranged inside the first space 204 can cooperate with the overall transmission structure to form a multi-elastic reset system, further improving the reset efficiency after the equipment is powered off, ensuring that the contacts can be separated quickly and completely, and avoiding the problem of continuous arc burning caused by contact separation lag.

[0040] The connecting rods 221 fixedly installed on both sides of the tray 212 can synchronously transmit the displacement of the tray 212 to the inner linkage contact structure, realizing the synchronous linkage between the contact closing action and the scraping structure movement. This ensures that the on / off action of the equipment and the self-cleaning action of the contacts are synchronized, and synchronous operation can be completed without the need for an additional drive source. The connecting hole 206 at the end of the upper housing 200 is used to assemble the bolt 201 and the nut 202 to fix the stationary contact 207. This assembly method is structurally stable and can ensure that the stationary contact 207 will not loosen during long-term operation. At the same time, it is easy to disassemble and replace the stationary contact 207 after wear, reducing maintenance costs. The stationary contact 207 is fixed inside the bolt 201 and is relatively stationary. It can form a stable contact relationship with the movable contact 214, ensuring the stability of circuit conduction.

[0041] The connection hole 107 on the lower housing 100 and the connection hole 301 on the connecting plate 300 are sized to match each other and can form a suitable assembly relationship with the bolt 400. This enables precise alignment and assembly between the lower housing 100 and the connecting plate 300, and between the connecting plate 300 and the upper housing 200, ensuring the overall assembly accuracy and structural integrity of the machine. It avoids problems such as excessive assembly gaps and misalignment that affect the internal transmission and contact engagement accuracy. The entire electromagnetic drive and step-by-step transmission structure is compact and well-coordinated. It relies on pure mechanical linkage in conjunction with the electromagnetic drive to complete the switching on and off and contact self-cleaning operations. The structure has strong linkage and a low failure rate, which can effectively adapt to high-frequency, high-current long-term working scenarios. While ensuring the accuracy of switch control and the stability of operation, it reduces useless energy consumption and component wear, improving the overall energy efficiency and service life of the equipment.

[0042] Example 3, see Figure 1-6 The slot 211 has an F-shaped structure that rotates 90 degrees clockwise. A sliding rod 215 is disposed inside the slot 211, with one end of the sliding rod 215 abutting against the end wall of the slot 211 and the other end fixedly connected to a spring 216. The other end of the spring 216 is fixedly connected to the other end wall of the slot 211. A side plate 217 is disposed inside the sliding rod 215, and a connecting shaft 218 is disposed between the two side plates 217. One end of the connecting rod 224 is rotatably connected to the connecting shaft 218.

[0043] Connecting block 219 is located in the slot 211 near spring 216. A side plate 222 is located on the side of connecting block 219 near sliding rod 215. A connecting shaft 223 is located between the two side plates 222. The other end of connecting rod 224 is rotatably connected to connecting shaft 223. The end of sliding rod 215 is fixedly connected to slot 211. A limit block 220 is located in slot 211 at the projection of the inner side of sliding rod 215 onto the direction of movement of connecting block 219, to limit the position of connecting rod 221. The size of the hollow portion 229 of scraping plate 225 matches the moving contact 214. Scraping plate 225 is set tightly against stationary contact 207. In the initial state, the center of the hollow portion 229 is not concentric with the center of stationary contact 207.

[0044] Specifically, the empty slot 211 adopts an F-shaped irregular cavity structure that rotates 90 degrees clockwise. Unlike the single cavity form of conventional straight or square slots, this irregular contour, relying on its own stepped and partitioned slot configuration, naturally forms a multi-segmented, layered installation and movement space. It is the core base structure that enables the entire linkage scraping structure to achieve precise, stable, and synchronous mechanical movements. The F-shaped slot contour has its own longitudinal limiting steps and lateral accommodating area. Without the need for additional limiting brackets, fixed baffles, positioning buckles, or other auxiliary parts, it can directly exert bidirectional physical constraints on the installation position, placement angle, and movement trajectory of the sliding rod 215 and the connecting block 219. This keeps the sliding rod 215 in a fixed horizontal installation posture, while restricting the connecting block 219 to only move laterally back and forth along a preset horizontal direction. This completely eliminates non-working displacements such as oblique offset, vertical sway, and radial swing, thus avoiding problems such as motion interference, jamming, misalignment, and stroke deviation during the linkage of multiple components from the structural root. This integrated cavity structure allows for the rational partitioning and utilization of the internal space of the upper shell 200. The elastic reset structure, hinged transmission structure, and contact cleaning structure are centrally housed within their respective slot sections, significantly improving the internal structural integration and reducing component loosening issues caused by cluttered internal space. Simultaneously, the stepped walls of the F-shaped slot 211 provide independent limiting support for different functional components. One end of the slot wall bears the tension and reset force of the sliding rod 215 and spring 216, while the middle section limits the rotational range of the hinged structure. The slot's limiting area, in conjunction with the limiting block 220, controls the stroke. This multi-segmented force distribution disperses the mechanical vibration and compressive stress generated during high-frequency reciprocating operation, preventing deformation, cracking, wear, and hole expansion caused by long-term concentrated stress on a single slot wall. This effectively enhances the structural strength and durability of the cavity matrix, providing a reliable structural foundation for the long-term stable operation of the entire linkage structure.

[0045] The sliding rod 215 is fixedly assembled inside the slot 211. One end of the sliding rod 215 abuts against the end wall of the slot 211, and the other end is fixedly connected to the spring 216. The end of the spring 216 is fixed to the end wall on the other side of the slot 211, forming a stable elastic tension structure. The two ends of the sliding rod 215 are limited and fixed and elastically supported by the side wall of the slot 211. During the process of the power-on contact closing, the sliding rod 215 can follow the displacement of the transmission structure to compress the spring 216, allowing the spring 216 to accumulate elastic potential energy. During the power-off reset phase of the equipment, the spring 216 releases the elastic potential energy, pushing the sliding rod 215 back to its initial position, thereby realizing the automatic reset of the linkage structure. This ensures that the linkage components can be accurately reset after each on / off cycle, ensuring the consistency of action in multiple reciprocating operations and avoiding the accumulation of action deviations over long-term operation.

[0046] Two sets of side plates 217 are symmetrically arranged on the inner side of the sliding rod 215. The connecting shaft 218 assembled between the two sets of side plates 217 provides a stable rotation fulcrum for the connecting rod 224. The symmetrically arranged side plates 217 can evenly distribute the compressive and shear forces generated during the rotation of the connecting rod 224, avoiding the deformation, wear, or breakage caused by concentrated stress on a single support structure. This effectively improves the stress stability and structural strength of the hinged rotating structure and extends the service life of the hinged joint structure. The connecting rod 224 rotates about the connecting shaft 218 as its axis, which can smoothly convert the linear displacement of the sliding rod 215 into angular rotation, realizing flexible power transmission, weakening the mechanical impact caused by rigid transmission, and making the linkage action smoother and more stable.

[0047] Connecting block 219 is positioned inside slot 211 near spring 216, conforming to the overall transmission layout to accommodate displacement travel and match the rhythm of movement during switch operation. Symmetrically distributed side plates 222 are located on the side of connecting block 219 near sliding rod 215. A connecting shaft 223, positioned between the two sets of side plates 222, forms a rotational engagement structure with the other end of connecting rod 224, allowing both ends of connecting rod 224 to form a complete articulated transmission system via connecting shaft 218 and connecting shaft 223 respectively. This transmission structure precisely transmits the displacement power of sliding rod 215, driving connecting block 219 to follow a preset trajectory for translational movement. This ensures that the movement of connecting block 219 is highly synchronized with the contact closing and opening / closing actions, achieving timing matching between the scraping structure and the switch operation.

[0048] The fixed connection between the end of the sliding rod 215 and the slot 211 ensures the stability of the overall installation position of the sliding rod 215, preventing it from shaking or shifting. This ensures the hinge fulcrum position remains constant, maintaining a fixed transmission ratio and stroke, and avoiding linkage failures and misalignments caused by fulcrum offset. The limiting block 220 inside the slot 211 is positioned at the projection of the inner side of the sliding rod 215 and the vertical connecting block 219 in the direction of movement. This effectively limits the extreme movement of the connecting rod 221, preventing overtravel displacement during reciprocating motion, avoiding collisions, compression, and structural deformation caused by excessive component movement. It also constrains the movement amplitude of each component, ensuring consistent working stroke of the scraping structure during each on / off operation, resulting in more uniform and stable contact cleaning.

[0049] The scraper 225 is positioned flush against the surface of the stationary contact 207. The structural dimensions of the hollow portion 229 match the external dimensions of the moving contact 214, ensuring that the moving contact 214 can be precisely embedded inside the hollow portion 229 when the contact is closed, achieving precise alignment between the contact and the scraping structure. Initially, the center of the hollow portion 229 is not concentric with the center of the stationary contact 207, allowing the ring blade 226 at the edge of the hollow portion 229 to conform to the surface of the stationary contact 207, forming an eccentric fit. During the reciprocating motion of the switch, the eccentric structure allows the ring blade 226 to fully conform to the sintered area of ​​the contact to complete the scraping operation. Compared to a concentric structure, this allows for a larger cleaning range and can stably scrape away micro-protrusions and sintered solder joints formed by high-temperature melting on the contact surface, maintaining the flatness of the contact surface between the moving and stationary contacts.

[0050] The following is combined Figures 1-6 Explain its working process: When the winding assembly 102 is energized, it magnetizes the stationary iron core 104 located inside the wire frame 101, causing it to magnetically attract the moving iron core 103 to move towards the stationary iron core 104. The movement of the moving iron core 103 towards the stationary iron core 104 drives the first central shaft 105 to move from inside the lower housing 100 to inside the upper housing 200. During this process, the moving iron core 103 compresses the first spring 106, causing the first central shaft 105 to continue moving into the upper housing 200. The first central shaft 105 compresses the third spring 210, causing the first central shaft 105 to move inside the outer sleeve 209, driving the second central shaft 208 to move towards the second spring 205 in the space 204, and driving the moving contact 214 to move towards the stationary contact 207.

[0051] During this process, the support plate 212 set on the second central shaft 208, the connecting rod 221 on both sides of the support plate 212 drives the sliding rod 215 to move towards the spring 205, thereby causing the sliding rod 215 to compress the spring 4 216, causing the side plate 217 and the connecting shaft 218 to move towards the spring 205. One end of the connecting rod 224 rotates counterclockwise around the connecting shaft 218, and the other end of the connecting rod 224 is connected to the side plate 222 and the connecting shaft 223, pushing the connecting shaft 223, the side plate 222 and the connecting block 219 to move towards the stationary contact 207, thereby causing the hollow part 229 of the scraping plate 225 to be in the hollow part 229 when the moving contact 214 abuts against the stationary contact 207. At this time, the hollow part 229, the moving contact 214 and the stationary contact 207 are concentric. When the winding assembly 102 is de-energized, the aforementioned components return in their original direction, which will not be described in detail here. It is worth noting that the ring blade 226 of the scraper plate 225 can scrape off the solder joints of the stationary contact 207 and the moving contact 214 caused by the high temperature of the contact when the winding assembly 102 is energized. When the winding assembly 102 is energized again, the ring blade 226 of the scraper plate 225 can scrape off the micro-protrusions on the stationary contact 207 caused by the high temperature of the stationary contact 207 and the moving contact 214 in the same manner, thereby avoiding the situation where the solder joints of the stationary contact 207 and the moving contact 214 cannot be separated due to the high temperature, which is energy-saving and convenient.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An energy-saving electromagnetic switch, comprising a lower housing (100), an upper housing (200), and a connecting plate (300), characterized in that: The lower housing (100) and the connecting plate (300) are fixedly connected, and the upper housing (200) and the connecting plate (300) are detachably connected by bolts (400); The inner wall of the upper housing (200) is provided with a slot (211), and a linkage contact element is provided in the slot (211); The linkage contact component includes a sliding rod (215) and a connecting block (219) disposed in the slot (211). The connecting block (219) and the sliding rod (215) are hingedly connected by a connecting rod (224). The connecting block 1 (219) is provided with a scraper (225) on the side near the inner side of the upper housing (200). The scraper (225) includes a square part (228), an annular part (227) connected to the square part (228), a hollow part (229) provided in the middle of the annular part (227), and a ring blade part (226) provided on the edge of the hollow part (229).

2. The energy-saving electromagnetic switch according to claim 1, characterized in that: The lower housing (100) is provided with a wire frame (101) and a winding group (102) wound on the wire frame (101). The wire frame (101) is hollow in the middle, and a moving iron core (103) is provided on one side of the middle part of the wire frame (101).

3. The energy-saving electromagnetic switch according to claim 2, characterized in that: A stationary iron core (104) is provided on the other side of the middle part of the wire frame (101). The moving iron core (103) and the stationary iron core (104) are provided with a first central shaft (105) in the middle. The moving iron core (103) and the stationary iron core (104) do not contact each other in the initial state.

4. An energy-saving electromagnetic switch according to claim 3, characterized in that: A spring (106) is provided on the first central shaft (105), and a hole is provided in the middle of the connecting plate (300) for the first central shaft (105) to pass through. A spring (210) is fixedly provided at the top of the first central shaft (105).

5. An energy-saving electromagnetic switch according to claim 4, characterized in that: The other end of the spring three (210) is fixedly connected to the bottom of the second central shaft (208). The top of the second central shaft (208) is provided with a support plate (212). Movable contacts (214) are provided on both sides of the support plate (212). A protrusion block two (213) is provided in the middle of the support plate (212). An outer sleeve plate (209) is provided at the connection between the bottom of the second central shaft (208) and the spring three (210).

6. An energy-saving electromagnetic switch according to claim 5, characterized in that: The first central axis (105) moves within the outer sleeve (209); A connecting rod (221) is fixedly installed on both sides of the tray (212); The upper housing (200) is provided with a second connection hole (206) at its end. A bolt (201) is provided in the second connection hole (206). A nut (202) is provided on the outside of the bolt (201). A stationary contact (207) is provided on the inside of the bolt (201). A protrusion block 1 (203) is provided in the middle of the end of the upper housing (200). A space 1 (204) is provided inside the protrusion block 1 (203). The space 1 (204) is located on the upper housing (200). A spring 2 (205) is provided in the space 1 (204). The size of the protrusion block 2 (213) matches that of the space 1 (204). The connecting plate (300) is provided with a third connecting hole (301), and the lower housing (100) is provided with a first connecting hole (107). The third connecting hole (301) matches the dimensions of the first connecting hole (107) and the bolt (400).

7. An energy-saving electromagnetic switch according to claim 6, characterized in that: The empty slot (211) is an F-shaped structure that rotates 90 degrees clockwise; The sliding rod (215) is disposed in the empty groove (211). One end of the sliding rod (215) abuts against the end wall of the empty groove (211), and the other end is fixedly connected to a spring (216). The other end of the spring four (216) is fixedly connected to the other end wall of the slot (211).

8. An energy-saving electromagnetic switch according to claim 7, characterized in that: The sliding rod (215) has a side plate (217) on its inner side, and a connecting shaft (218) is provided between the two side plates (217). One end of the connecting rod (224) is rotatably connected to the connecting shaft (218).

9. An energy-saving electromagnetic switch according to claim 8, characterized in that: The first connecting block (219) is located in the slot (211) near the fourth spring (216). The first connecting block (219) is provided with a second side plate (222) near the sliding rod (215). A second connecting shaft (223) is provided between the two second side plates (222). The other end of the second connecting rod (224) is rotatably connected to the second connecting shaft (223), and the end of the sliding rod (215) is fixedly connected to the slot (211). A limit block (220) is provided in the slot (211) at the projection of the inner side of the sliding rod (215) and the direction perpendicular to the movement of the first connecting block (219) to limit the position of the first connecting rod (221).

10. An energy-saving electromagnetic switch according to claim 9, characterized in that: The size of the hollow portion (229) of the scraper (225) matches that of the moving contact (214). The scraper (225) is set close to the stationary contact (207). In the initial state, the center of the hollow portion (229) is not concentric with the center of the stationary contact (207).

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