Contactor

Abstract

The utility model discloses a contactor, which relates to the technical field of contactors and comprises a shell, a movable iron core, a static iron core, a contact support, a movable contact, a static contact, a coil, an elastic piece, a first damping piece and a first damping pad. The connecting end of the first damping piece is detachably connected with the contact support and is relatively fixed in the first direction, the first damping pad is arranged between the movable iron core and the contact support, and the movable iron core, the first damping pad and the contact support are distributed in the first direction. The movable iron core and the static iron core can be in contact with each other or away from each other in the first direction and drive the movable contact and the static contact to get close to each other or away from each other. According to the contactor, vibration between the moving contact and the static contact can be reduced, the arcing time is shortened, the safety is higher, and the service life is longer.

Description

Technical Field

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

[0002] A contactor is a commonly used electrical switch. During operation, the moving and stationary iron cores of the contactor frequently separate and re-enter to allow the moving and stationary contacts to connect and disconnect. Each time the moving and stationary contacts separate, the moving and stationary iron cores collide. The energy generated by this collision is transferred to the moving contact during operation, easily causing vibration and secondary bouncing between them. Significant bouncing increases the arcing time between the moving and stationary contacts, potentially leading to arcing and welding. This can result in the contactor being unable to interrupt the current in the main circuit, causing serious engineering accidents, poor safety, and a short service life. Therefore, there is an urgent need for a contactor that can reduce vibration between the moving and stationary contacts, shorten arcing time, improve safety, and extend service life. Utility Model Content

[0003] The purpose of this invention is to provide a contactor that solves the problems existing in the prior art, thereby reducing vibration between the moving and stationary contacts, reducing arcing time, improving safety, and extending service life.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a contactor, comprising: a housing, a moving iron core, a stationary iron core, a contact bracket, a moving contact, a stationary contact, a coil, an elastic element, a first damping element, and a first damping pad. The stationary iron core is fixedly connected inside the housing. The moving iron core is movably connected inside the housing along a first direction and can have a gap with the stationary iron core. The coil is fixedly connected inside the housing and located between the moving iron core and the stationary iron core. The elastic element is disposed between the moving iron core and the stationary iron core, with its two ends respectively abutting against the moving iron core and the stationary iron core. The first damping element is fixedly connected to the moving iron core. The connecting end of the first shock absorber is detachably connected to the contact bracket and fixed relative to it in the first direction. The first shock absorber pad is disposed between the moving iron core and the contact bracket. The moving iron core, the first shock absorber pad, and the contact bracket are distributed in the first direction. Both the first shock absorber pad and the first shock absorber are elastic. The moving contact is fixedly connected to the contact bracket. The stationary contact is fixedly connected to the outer shell. The moving iron core and the stationary iron core can move closer to or further away from each other in the first direction and drive the moving contact and the stationary contact to contact or move away from each other in the first direction.

[0006] In some embodiments, the first damping member includes a base plate, an extension section, and an elongation section. One end of each of the two extension sections is fixedly connected to both ends of the base plate, and one end of each of the two elongation sections is fixedly connected to the ends of the two extension sections away from the base plate. The two elongation sections and the base plate are located on different planes. The base plate is fixedly connected to the moving iron core, and the two elongation sections respectively form two connection ends.

[0007] In some embodiments, the moving iron core is provided with mounting holes that connect both sides of the moving iron core, and the substrate passes through the mounting holes and is fixedly connected in the mounting holes.

[0008] In some embodiments, the contact support is provided with two corresponding first mounting slots, the depth direction of the first mounting slots is perpendicular to the first direction, the two inner sidewalls of the mounting slots are arranged opposite each other in the first direction, and the two elongated sections can be inserted into and detachably connected to the two first mounting slots respectively.

[0009] In some embodiments, each of the first mounting slots is provided with a limiting part, the contact bracket is elastic, the limiting part is fixedly connected to the inner sidewall of the first mounting slot, and the elongated section can be locked between the limiting part and the inner bottom surface of the first mounting slot.

[0010] In some embodiments, the side of the limiting part is a partial cylindrical surface, and the axis of the limiting part is perpendicular to the depth direction of the first mounting groove.

[0011] In some embodiments, the contact bracket is provided with a second mounting groove on the side near the moving iron core, and the first shock-absorbing pad is fixedly connected in the second mounting groove.

[0012] In some embodiments, a second damping element and a second damping pad are also included. A short-circuit ring is fixedly connected to the end of the stationary iron core. The second damping element passes through the stationary iron core and is fixedly connected to the stationary iron core. The second damping pad is fixedly connected to both ends of the second damping element. Both second damping pads are fixedly connected to the outer shell.

[0013] In some embodiments, the housing includes a top cover, a middle cover, and a base, wherein the top cover and the base are detachably connected to both ends of the middle cover.

[0014] In some embodiments, the first damping member and the second damping member are both made of metal, and the first damping pad and the second damping pad are both made of rubber.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The contactor provided by this utility model, due to the inclusion of shock-absorbing components and damping pads, converts part of the energy from the collision between the moving and stationary iron cores into the elastic energy of the shock-absorbing components, while some energy is absorbed and dissipated by the damping pads. Only a small amount of collision energy is transferred to the moving contact. This reduces the vibration between the moving and stationary contacts, thereby reducing secondary bouncing and arcing time, preventing the moving and stationary contacts from welding together, and improving their service life. Furthermore, when the coil is de-energized, the moving and stationary contacts separate. At this time, the elastic potential energy absorbed by the shock-absorbing components is released and transferred to the contact support. The shock-absorbing components exert a force on the contact support that moves it away from the stationary iron core, which in turn causes the contact support to exert a force on the moving contact that moves it away from the stationary contact. This accelerates the disconnection speed between the moving and stationary contacts, further reducing the arcing time and improving their service life.

[0017] Furthermore, after installing the second damping component and the second damping pad, the energy generated by the collision between the moving iron core and the stationary iron core will be absorbed by the first damping pad, the second damping pad, the first damping component, and the second damping component. This can prevent the energy generated by the impact between the moving iron core and the stationary iron core from causing impact fatigue damage to the short-circuit ring, thereby preventing noise and damage to the moving and stationary contacts, and further improving the service life and safety performance of the contactor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective structural diagram of the contactor in some embodiments of this utility model;

[0020] Figure 2 for Figure 1 A cross-sectional view of the contactor;

[0021] Figure 3 for Figure 2 Sectional view along the middle AA;

[0022] Figure 4 for Figure 3 A partial enlarged view of the first damping pad and the first damping component;

[0023] Figure 5 This is a cross-sectional view of the connection between the moving iron core and the contact support in some embodiments of this utility model;

[0024] Figure 6 for Figure 5 A close-up view of the connection between the moving iron core and the contact support;

[0025] Figure 7 This is a three-dimensional structural diagram of the first shock-absorbing pad in some embodiments of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the moving iron core, contact bracket, and first shock-absorbing pad in some embodiments of this utility model;

[0027] Figure 9 This is a three-dimensional structural diagram of the first shock absorber in some embodiments of the present invention;

[0028] In the diagram: 1. Outer shell; 2. Moving iron core; 3. Stationary iron core; 4. Contact bracket; 5. Moving contact; 6. Stationary contact; 7. Coil; 8. Elastic element; 9. First shock absorber; 10. First shock absorber pad; 11. Second shock absorber; 12. Second shock absorber pad; 13. Short-circuit ring; 14. First mounting groove; 15. Limiting part; 16. Base plate; 17. Extension section; 18. Elongated section; 19. Top cover; 20. Middle cover; 21. Base. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] The purpose of this invention is to provide a contactor that solves the problems existing in the prior art, thereby reducing vibration between the moving and stationary contacts, reducing arcing time, improving safety, and extending service life.

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] This utility model provides a contactor, such as Figure 1-9As shown, it includes: a housing 1, a moving iron core 2, a stationary iron core 3, a contact bracket 4, a moving contact 5, a stationary contact 6, a coil 7, an elastic element 8, a first damping element 9, and a first damping pad 10. The stationary iron core 3 is fixedly connected inside the housing 1. The moving iron core 2 is movably connected inside the housing 1 along a first direction and can have a gap with the stationary iron core 3. The coil 7 is fixedly connected inside the housing 1 and located between the moving iron core 2 and the stationary iron core 3. The elastic element 8 is disposed between the moving iron core 2 and the stationary iron core 3, and its two ends abut against the moving iron core 2 and the stationary iron core 3 respectively. The first damping element 9 is fixedly connected to the moving iron core 2. The connecting end of the vibrating element 9 is detachably connected to the contact bracket 4 and fixed relative to each other in the first direction. The first damping pad 10 is disposed between the moving iron core 2 and the contact bracket 4. The moving iron core 2, the first damping pad 10 and the contact bracket 4 are distributed in the first direction. The first damping pad 10 and the first damping element 9 are both elastic. The stationary contact 6 is fixedly connected inside the housing 1. The moving contact 5 is fixedly connected to the contact bracket 4. The stationary contact 6 is fixedly connected to the housing 1. The moving iron core 2 and the stationary iron core 3 can move closer or further away from each other in the first direction and drive the moving contact 5 and the stationary contact 6 to contact or move away from each other in the first direction.

[0033] The contactor provided by this utility model has a moving contact 5 and a stationary contact 6 for conducting electricity with external electrical equipment. When the coil 7 is energized and generates an electric field, the moving iron core 2 and the stationary iron core 3 have magnetic attraction. Under the action of magnetic force, the moving iron core 2 and the stationary iron core 3 approach each other and collide, the elastic element 8 is compressed, and at the same time, the contact support 4 drives the moving contact 5 to contact the stationary contact 6, thereby connecting the electrical equipment. When the coil 7 is de-energized, the elastic element 8 extends, causing the moving iron core 2 and the stationary iron core 3 to separate. The moving iron core 2 causes the contact support 4 to drive the moving contact 5 away from the stationary contact 6, and the circuit is broken. Because this contactor incorporates a first damping element 9 and a first damping pad 10 between the contact support 4 and the moving iron core 2, some of the energy from the collision between the moving iron core 2 and the stationary iron core 3 is converted into the elastic energy of the first damping element 9, and some energy is absorbed and dissipated by the first damping pad 10. Only a small amount of collision energy is transferred to the moving contact 5. This reduces the vibration between the moving contact 5 and the stationary contact 6, thereby reducing secondary bouncing between them, reducing arcing time, preventing the moving contact 5 and the stationary contact 6 from welding together, and improving the stability of the moving contact 5 and the stationary contact 6. The service life of the stationary contact 6 is extended. Furthermore, when the coil 7 is de-energized, the moving contact 5 and the stationary contact 6 separate. At this time, the elastic potential energy absorbed by the first damping element 9 is released and transferred to the contact support 4. The first damping element 9 exerts a force on the contact support 4, causing the contact support 4 to move away from the stationary iron core 3. This, in turn, causes the contact support 4 to exert a force on the moving contact 5, moving away from the stationary contact 6, thereby accelerating the disconnection speed between the moving contact 5 and the stationary contact 6, further reducing the arcing time between the moving contact 5 and the stationary contact 6, and improving the service life of the moving contact 5 and the stationary contact 6. In addition, the first damping element 9 is detachable from the contact support 4, facilitating the removal and replacement of the first damping element 9.

[0034] Specifically, the moving contact 5 and the contact support 4 are connected by a connecting spring, with both ends of the connecting spring fixedly connected to the contact support 4 and the moving contact 5, respectively.

[0035] In this embodiment, the first damping member 9 includes a base plate 16, extension sections 17, and elongated sections 18. One end of each of the two extension sections 17 is fixedly connected to both ends of the base plate 16, and one end of each of the two elongated sections 18 is fixedly connected to the ends of the two extension sections 17 that are away from the base plate 16. The two elongated sections 18 and the base plate 16 are located on different planes. The base plate 16 is fixedly connected to the moving iron core 2, and the two elongated sections 18 form two connecting ends. The first damping member 9 is provided with two elongated sections 18, both of which are connected to the contact support 4. This enables the force between the first damping member 9 and the contact support 4 to be more uniform.

[0036] In order to enhance the stability of the first shock absorber 9 after installation, in this embodiment, the moving iron core 2 is provided with mounting holes that connect both sides of the moving iron core 2, the base plate 16 passes through the mounting holes and is fixedly connected in the mounting holes, and the two extension sections 17 and the two elongated sections 18 are all provided outside the through holes.

[0037] In this first embodiment, the contact bracket 4 is provided with two corresponding first mounting grooves 14. The depth direction of the first mounting grooves 14 is perpendicular to the first direction. The two inner sidewalls of the mounting grooves are arranged opposite each other in the first direction. Two elongated sections 18 can be inserted into and detachably connected to the two first mounting grooves 14 respectively. After the two elongated sections 18 are inserted into the first mounting grooves 14, the two inner sidewalls of the mounting grooves can limit the elongated sections 18 in the first direction, thereby realizing the fixed connection between the first shock absorber 9 and the contact bracket 4 in the first direction. The depth direction of the first mounting groove 14 refers to the direction from the opening of the first mounting groove 14 to the bottom surface.

[0038] In this first embodiment, each first mounting groove 14 is provided with a limiting part 15. The contact bracket 4 is elastic, and the limiting part 15 is fixedly connected to the inner sidewall of the first mounting groove 14. The elongated section 18 can be locked between the limiting part 15 and the inner bottom surface of the first mounting groove 14. During installation, the user only needs to insert the elongated section 18 into the groove of the first mounting groove 14 to deform the contact bracket 4 and lock the elongated section 18 between the limiting part 15 and the bottom surface of the first mounting groove 14 (at this time, the contact bracket 4 returns to its natural state), thus completing the connection between the contact bracket 4 and the first shock absorber 9. The installation is convenient and quick. The contact bracket 4 is preferably made of PA plastic.

[0039] In this first embodiment, the side of the limiting part 15 is partially cylindrical, and the axis of the limiting part 15 is perpendicular to the depth direction of the first mounting groove 14. The cylindrical limiting part 15 facilitates the entry or exit of the elongated section 18 into or out of the first mounting groove 14, further improving the ease of installation of the first shock absorber 9.

[0040] In this first embodiment, a second mounting groove is provided on the side of the contact bracket 4 near the moving iron core 2, and the first damping pad 10 is embedded in the second mounting groove. By embedding the first damping pad 10 in the second mounting groove, the reliability of the connection between the first damping pad 10 and the contact bracket 4 is improved.

[0041] When the moving iron core 2 and the stationary iron core 3 collide, the energy of the collision is transferred to the short-circuit ring 13 through the stationary iron core 3. The short-circuit ring 13 is squeezed by the moving iron core 2 and the stationary iron core 3, which can easily lead to the breakage and damage of the short-circuit ring 13. After the short-circuit ring 13 breaks, the high-frequency impact between the moving iron core 2 and the stationary iron core 3 not only causes severe vibration and noise, but also easily leads to the inability of the moving iron core 2 and the stationary iron core 3 to reliably engage, and causes severe collision between the moving contact 5 and the stationary contact 6 of the contactor, causing wear on the moving contact 5 and the stationary contact 6, reducing their service life, and causing safety problems. To address the aforementioned issues, this embodiment further includes a second damping element 11 and a second damping pad 12. A short-circuit ring 13 is fixedly connected to the end of the stationary iron core 3. The second damping element 11 passes through the stationary iron core 3 and is fixedly connected to it. Second damping pads 12 are fixedly connected to both ends of the second damping element 11. Both second damping pads 12 are fixedly connected to the outer casing 1. Both the second damping pads 12 and the second damping element 11 are elastic. After the second damping element 11 and the second damping pad 12 are provided, the energy generated by the collision between the moving iron core 2 and the stationary iron core 3 will be absorbed by the first damping pad 10, the second damping pad 12, the first damping element 9, and the second damping element 11. This prevents the energy generated by the impact between the moving iron core 2 and the stationary iron core 3 from causing impact fatigue damage to the short-circuit ring 13, thereby preventing noise and damage to the moving contact 5 and the stationary contact 6, further improving the service life and safety performance of the contactor.

[0042] To facilitate the disassembly and installation of the outer casing 1, in this first embodiment, the outer casing 1 includes a top cover 19, a middle cover 20, and a base 21. The top cover 19 and the base 21 are detachably connected to both ends of the middle cover 20. The top cover 19, the middle cover 20, and the base 21 can be detachably connected by screws or clips.

[0043] In this first embodiment, both the first damping member 9 and the second damping member 11 are made of metal, while both the first damping pad 10 and the second damping pad 12 are made of rubber. Rubber has good elasticity and can effectively absorb energy. The first damping member 9 and the second damping member 11 can be made of elastic metals such as iron or copper.

[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A contactor characterized by: The utility model relates to a switch, including: Shell, moving iron core, static iron core, contact support, moving contact, static contact, coil, elastic piece, first shock absorber, first shock pad, static iron core is fixedly connected in the shell, moving iron core is movably connected in the shell along the first direction and can have interval between moving iron core and static iron core, coil is fixedly connected in the shell and is located between moving iron core and static iron core, elastic piece is arranged between moving iron core and static iron core and both ends are respectively abutted on moving iron core and static iron core, first shock absorber is fixedly connected on moving iron core, the connecting end of first shock absorber is detachably connected with contact support and is opposite fixed in the first direction, first shock pad is arranged between moving iron core and contact support, moving iron core, first shock pad and contact support are distributed in the first direction, first shock pad and first shock absorber all have elasticity, moving contact is fixedly connected on contact support, static contact is fixedly connected with shell, moving iron core and static iron core can approach or be far away from each other in the first direction and drive moving contact and static contact to be in contact or be far away from each other in the first direction.

2. The contactor of claim 1, wherein: The first shock absorber includes a base plate, two extension segments, and two elongated segments. One end of each of the two extension segments is fixedly connected to two ends of the base plate. One end of each of the two elongated segments is fixedly connected to the end of each of the two extension segments that is away from the base plate. The two elongated segments are located on different planes from the base plate. The base plate is fixedly connected to the moving iron core. The two elongated segments form the two connecting ends, respectively.

3. The contactor of claim 2, wherein: The moving iron core is provided with a mounting hole that communicates between both sides of the moving iron core. The base plate passes through the mounting hole and is fixedly connected in the mounting hole.

4. The contactor of claim 3, wherein: The contact support is provided with two first mounting slots that correspond in position. The depth direction of the first mounting slot is perpendicular to the first direction. The two inner side walls of the mounting slot are oppositely arranged in the first direction. The two elongated segments can be inserted and detachably connected in the two first mounting slots, respectively.

5. The contactor of claim 4, wherein: Each of the first mounting slots is provided with a limiting portion. The contact support has elasticity. The limiting portion is fixedly connected to the inner side wall of the first mounting slot. The elongated segment can be clamped between the limiting portion and the inner bottom surface of the first mounting slot.

6. The contactor of claim 5, wherein: The side surface of the limiting portion is a partial cylindrical surface. The axis of the limiting portion is perpendicular to the depth direction of the first mounting slot.

7. The contactor of claim 1, wherein: The side of the contact support that is close to the moving iron core is provided with a second mounting slot. The first shock pad is fixedly connected in the second mounting slot.

8. The contactor of claim 1, wherein: The utility model further includes a second shock absorber and a second shock pad. The end of the static iron core is fixedly connected with a short circuit ring. The second shock absorber passes through the static iron core and is fixedly connected to the static iron core. Both ends of the second shock absorber are fixedly connected with the second shock pad. Both of the second shock pads are fixedly connected with the shell.

9. The contactor of claim 1, wherein: The shell includes a top cover, a middle cover, and a base. The top cover and the base are detachably connected to both ends of the middle cover, respectively.

10. The contactor of claim 8, wherein: The first damping member and the second damping member are both metal materials, and the first damping pad and the second damping pad are both rubber materials.

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