Contactor

Abstract

The utility model relates to a contactor, which comprises a shell, a magnet yoke plate and a magnet yoke inserted on the magnet yoke plate are arranged in the shell, a coil framework is arranged between the magnet yoke plate and the magnet yoke, a coil is wound on the coil framework, a placing groove is arranged in the coil framework, a push rod assembly is arranged in the placing groove, and a circuit board is arranged at one end of the coil framework. And the other end of the coil framework is provided with a contact support. According to the utility model, the coil skeleton is internally provided with the placing groove for installing the push rod assembly, so that the structure of the whole contactor is more compact, the occupied space is reduced, the push rod assembly extends into the contact support through the push rod groove, the effective transmission of electromagnetic force and mechanical action is realized, and the response speed and the action accuracy of the contactor are improved; the movable contact bridge assembly is arranged in the contact support, the contact is closed and opened through pushing of the push rod assembly, abrasion and arc ablation of a contact system can be reduced, the service life of the contactor is prolonged, and the reliability of the contactor is improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a contactor. Background Technology

[0002] In power systems, contactors are commonly used electrical control components, widely applied in motor control, power distribution, and automation control. Traditional contactors typically consist of a housing, yoke, coil, and contact system. The magnetic field generated by energizing the coil drives the contact system to connect and disconnect the circuit. However, with the rapid development of power electronics technology and the increasing demands of automation control, traditional contactors face numerous challenges in terms of performance, reliability, service life, and intelligence. The contact system of traditional contactors often suffers from wear and arc erosion, leading to increased contact resistance and decreased contact reliability. Furthermore, the coil and yoke designs of traditional contactors often exhibit high energy consumption and heat generation, limiting their application in energy-efficient fields. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a contactor with a compact structure, fast response speed and long service life.

[0004] To achieve the above objectives, this utility model employs a contactor comprising a housing, within which a magnetic yoke plate and a magnetic yoke inserted into the yoke plate are disposed. A coil frame is installed between the magnetic yoke plate and the magnetic yoke, and a coil is wound on the coil frame. A placement groove is provided inside the coil frame, and a push rod assembly is installed in the placement groove. A circuit board is provided at one end of the coil frame, and a column is provided at one end of the coil frame corresponding to the circuit board. The column is connected to the circuit board through a column groove on the magnetic yoke. A contact support is provided at the other end of the coil frame. A push rod groove is provided on the magnetic yoke plate corresponding to the placement groove in the coil frame. The push rod assembly extends into the contact support through the push rod groove. Moving contact bridge assemblies are provided on both sides of the contact support, and copper pillars are provided at opposite ends of the moving contact bridge assemblies.

[0005] The beneficial effects of the above structure are as follows: the placement slot inside the coil frame for installing the push rod assembly makes the entire contactor structure more compact and reduces space occupation; the push rod assembly extends into the contact support through the push rod slot, realizing the effective transmission of electromagnetic force and mechanical action, improving the contactor's response speed and action accuracy; the moving contact bridge assembly inside the contact support realizes the closing and opening of the contacts through the push rod assembly, which can reduce wear and arc erosion of the contact system, and improve the contactor's service life and reliability.

[0006] This utility model is further configured as follows: the push rod assembly includes a moving iron core installed in a placement slot, a magnetic shielding sleeve fitted on the outer wall of the moving iron core, a guide post fitted on the outer wall of the magnetic shielding sleeve, and a push rod passing through a through hole inside the moving iron core. The top of the push rod has a vertex, and the magnetic yoke has a push rod opening for connecting the vertex of the push rod to the circuit board. An auxiliary moving contact bridge is provided between the circuit board and the vertex of the push rod. One end of the auxiliary moving contact bridge is connected to the circuit board, and the other end is wrapped around the vertex of the push rod and has an auxiliary moving contact. The circuit board has an auxiliary stationary contact corresponding to the auxiliary moving contact. The push rod extends through the push rod slot into the contact support and is laterally inserted with a top rod. The top rod is located at the upper end of the moving contact bridge assembly. A spring is wound around the top rod, one end of the spring abutting against the top rod and the other end abutting against the magnetic yoke. By using the moving iron core, magnetic shielding sleeve, and guide post in combination, electromagnetic force can be transmitted to the push rod more efficiently, and then to the contact system, which improves the contactor's response speed and action accuracy. The auxiliary moving contact bridge and auxiliary stationary contact add extra contact functions to the contactor, which can be used to realize more control logic and circuit protection.

[0007] This utility model further comprises a moving contact bridge assembly including a moving contact bridge disposed at the inner bottom of a contact support. The moving contact bridge has a boss, and the inner top of the contact support has an abutment corresponding to the boss. A compression spring is provided between the abutment and the boss. Both ends of the moving contact bridge extend outwards, and a moving contact is provided downwards at the end furthest from the coil frame. A stationary contact is provided at the end of the copper pillar corresponding to the moving contact bridge where the moving contact is located. This moving contact bridge assembly improves the accuracy of connecting and disconnecting the circuit between the moving and stationary contacts, helping to reduce circuit failures caused by poor contact or malfunctions. The compression spring design between the abutment and the boss provides necessary elasticity and cushioning for the movement of the moving contact bridge, helping to reduce wear and noise during movement and improving the service life of the contactor.

[0008] This utility model is further configured with a lead plate inserted into one side of the coil frame. The lead plate has a first pin and a second pin respectively. The first pin is connected to the circuit board via a connector, and the second pin extends downwards and connects to the coil's lead wire. The circuit board also has pins. Through the combined use of the lead plate and the connector, a stable connection between the electromagnetic coil and the circuit board is achieved. The connector makes the connection between the first pin and the circuit board easy to plug in and remove and replace. The second pin extends downwards and is tightly connected to the coil's lead wire, providing a stable and continuous current supply to the coil.

[0009] This utility model is further configured with a housing comprising a base, a middle seat mounted on the base, and a top cover snapped onto the middle seat. The magnetic yoke plate is disposed within the middle seat, and its lower end is connected to the base via mounting screws. The copper pillar is installed within the base and extends outward through a copper pillar groove on the base. The outer wall of the base is also provided with a hook. The middle seat has a locking block, and the top cover is snapped onto the middle seat via the locking block. Both the top cover and the outer wall of the middle seat are provided with pin slots, which match pins on the circuit board, and the pins extend outward through these slots. The combined design of the base, middle seat, and top cover achieves a stable connection and sealing of the housing, improving the stability and reliability of the entire structure. The copper pillar extending outward through the copper pillar groove on the base, and the pins extending outward through the pin slots on the top cover and middle seat, facilitate convenient connection to external circuits. The effective placement and support of the magnetic yoke plate ensures that the magnetic field generated by the electromagnetic coil can be stably and efficiently transmitted to the contact system, improving the electromagnetic performance and operational accuracy of the contactor. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0011] Figure 2 This is a schematic diagram of the internal structure of the shell according to an embodiment of the present invention.

[0012] Figure 3 This is an exploded view of the coil frame, yoke, and yoke plate according to an embodiment of this utility model.

[0013] Figure 4 This is an exploded view of the push rod assembly according to an embodiment of the present invention.

[0014] Figure 5 This is a side view of the push rod and the circuit board in an embodiment of the present invention.

[0015] Figure 6 This is a schematic diagram showing the cooperation between the moving contact bridge assembly, the push rod, and the copper column in an embodiment of this utility model.

[0016] Figure 7 This is a schematic diagram of the contact support and moving contact bridge according to an embodiment of the present invention.

[0017] Figure 8 This is a schematic diagram of the interaction between the pins on the coil frame and the lead plate in an embodiment of this utility model. Detailed Implementation

[0018] like Figures 1-8As shown, an embodiment of this utility model provides a contactor, including a housing 1. A magnetic yoke plate 2 and a magnetic yoke 3 inserted into the magnetic yoke plate 2 are provided inside the housing 1. A coil frame 4 is installed between the magnetic yoke plate 2 and the magnetic yoke 3. A coil 5 is wound on the coil frame 4. A placement groove 41 is provided inside the coil frame 4. A push rod assembly 6 is installed in the placement groove 41. A circuit board 7 is provided at one end of the coil frame 4. Two pillars 42 are provided at one end of the coil frame 4 corresponding to the circuit board 7. Both pillars 42 are connected to the circuit board 7 through pillar slots 31 opened on the magnetic yoke 3. A contact support 8 is provided at the other end of the coil frame 4. A push rod slot 21 is opened on the magnetic yoke plate 2 corresponding to the placement groove 41 inside the coil frame 4. The push rod assembly 6 extends into the contact support 8 through the push rod slot 21. Moving contact bridge assemblies 9 are provided inside both sides of the contact support 8. Four copper pillars 10 are provided at the opposite ends of the moving contact bridge assemblies 9.

[0019] The push rod assembly 6 includes a moving iron core 61 installed in the placement slot 41, a magnetic shielding sleeve 62 sleeved on the outer wall of the moving iron core 61, a guide post 63 sleeved on the outer wall of the magnetic shielding sleeve 62, and a push rod 64 passing through the internal through hole of the moving iron core 61. A retaining ring 60 is also engaged with the push rod 64, located between the moving iron core 61 and the push rod 64. The top of the push rod 64 has a vertex 65. The magnetic yoke 3 has a push rod opening 32 connecting the vertex 65 of the push rod 64 to the circuit board 7. The circuit board 7 and the vertex 65 of the push rod 64... An auxiliary moving contact bridge 66 is provided between the components. One end of the auxiliary moving contact bridge 66 is inserted into the circuit board 7, and the other end is wrapped around the apex 65 of the push rod 64. An auxiliary moving contact 67 is provided. An auxiliary stationary contact 71 is provided on the circuit board 7 corresponding to the auxiliary moving contact 67. The push rod 64 extends into the contact support 8 through the push rod groove 21 and is transversely inserted with a top rod 68. The top rod 68 is located at the upper end of the moving contact bridge assembly 9. A spring 69 is wrapped around the push rod 64. One end of the spring 69 abuts against the push rod 64, and the other end abuts against the magnetic yoke plate 2.

[0020] The moving contact bridge assembly 9 includes two moving contact bridges 91 disposed at the bottom of the contact support 8. Each moving contact bridge 91 is provided with a boss 92. The top of the contact support 8 is provided with a contact platform 81 corresponding to the boss 92. A compression spring 93 is provided between the contact platform 81 and the boss 92. Both ends of the moving contact bridge 91 extend outward, and a moving contact 94 is provided downward at the end away from the coil frame 4. Four copper pillars 10 are provided with stationary contacts 101 at the end of the moving contact bridge 91 where the moving contact 94 is provided.

[0021] Two pin plates 43 are also inserted on one side of the coil frame 4. The two pin plates 43 are respectively provided with a first pin 44 and a second pin 45. The first pin 44 is connected to the circuit board 7 through a connector 46. The second pin 45 extends downward and is soldered to the lead wire of the coil 5 (not shown in the figure). The circuit board 7 is also provided with a pin 72.

[0022] The housing 1 includes a base 11, a middle seat 12 mounted on the base 11, and an upper cover 13 snapped onto the middle seat 12. The magnetic yoke 2 is disposed inside the middle seat 12, and its lower end is connected to the base 11 by two mounting screws. Four copper pillars 10 are installed inside the base 11 and extend outward through copper pillar slots opened on the base 11. The outer wall of the base 11 is also provided with hooks 111. Both sides of the middle seat 12 are provided with locking blocks 121. The upper cover 13 is snapped onto the middle seat 12 by the locking blocks 121 provided on the middle seat 12. The outer walls of the upper cover 13 and the middle seat 12 are also provided with pin slots. The pin slots match the pins 72 on the circuit board 7, and the pins 72 extend outward through the pin slots.

[0023] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A contactor, characterized in that: The device includes a housing, within which a magnetic yoke plate and a magnetic yoke inserted into the yoke plate are provided. A coil frame is installed between the magnetic yoke plate and the magnetic yoke, and a coil is wound on the coil frame. The coil frame has a placement slot inside, and a push rod assembly is installed in the placement slot. A circuit board is provided at one end of the coil frame, and a column is provided at one end of the coil frame corresponding to the circuit board. The column is connected to the circuit board through a column slot on the magnetic yoke. A contact support is provided at the other end of the coil frame. A push rod slot is provided on the magnetic yoke plate corresponding to the placement slot in the coil frame. The push rod assembly extends into the contact support through the push rod slot. Moving contact bridge assemblies are provided on both sides of the contact support, and copper pillars are provided at opposite ends of the moving contact bridge assemblies.

2. The contactor according to claim 1, characterized in that: The push rod assembly includes a moving iron core installed in a placement slot, a magnetic shielding sleeve fitted on the outer wall of the moving iron core, a guide post fitted on the outer wall of the magnetic shielding sleeve, and a push rod passing through a through hole inside the moving iron core. The top of the push rod has a vertex, and the magnetic yoke has a push rod opening for connecting the vertex of the push rod to the circuit board. An auxiliary moving contact bridge is provided between the circuit board and the vertex of the push rod. One end of the auxiliary moving contact bridge is connected to the circuit board, and the other end is wrapped around the vertex of the push rod and has an auxiliary moving contact. The circuit board has an auxiliary stationary contact corresponding to the auxiliary moving contact. The push rod extends through a push rod slot into the contact support and is laterally inserted with a top rod. The top rod is located at the upper end of the moving contact bridge assembly, and a spring is wound around the top rod. One end of the spring abuts against the top rod, and the other end abuts against the magnetic yoke.

3. The contactor according to claim 1 or 2, characterized in that: The moving contact bridge assembly includes a moving contact bridge disposed at the bottom of the inner side of the contact support. The moving contact bridge has a boss, and the inner top of the contact support has a contact platform corresponding to the boss. A compression spring is disposed between the contact platform and the boss. The two ends of the moving contact bridge extend outward, and a moving contact is disposed downward at the end away from the coil frame. The copper pillar has a stationary contact at the end where the moving contact is disposed corresponding to the moving contact bridge.

4. The contactor according to claim 3, characterized in that: A pin board is also inserted on one side of the coil frame. The pin board has a first pin and a second pin respectively. The first pin is connected to the circuit board through a connector, and the second pin extends downward to connect to the lead wire of the coil. The circuit board also has pins.

5. The contactor according to claim 4, characterized in that: The housing includes a base, a middle seat mounted on the base, and a top cover snapped onto the middle seat. The magnetic yoke plate is disposed inside the middle seat, and its lower end is connected to the base by mounting screws. The copper pillar is installed inside the base and extends outward through a copper pillar groove opened on the base. The outer wall of the base is also provided with a hook. The middle seat is provided with a locking block. The top cover is snapped onto the middle seat through the locking block provided on the middle seat. The outer walls of the top cover and the middle seat are also provided with pin slots. The pin slots match the pins on the circuit board, and the pins extend outward through the pin slots.

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