Vibration reduction system and contactor

Abstract

The utility model discloses a vibration damping system, which relates to the technical field of contactor vibration damping and mainly comprises a tower-shaped spring and an elastic piece, the elastic piece is arranged at the lower end of a static iron core of a contactor, the tower tip end of the tower-shaped spring is connected with the lower end of the static iron core, and the tower bottom end of the tower-shaped spring is fixedly connected with a placing pedestal of the static iron core. The utility model further discloses a contactor which comprises a shell, a contact, a movable iron core, a static iron core, a coil, a reset spring and the vibration reduction system, the contact, the movable iron core, the static iron core, the coil, the reset spring and the vibration reduction system are arranged in the shell, the movable iron core and the static iron core are oppositely arranged, the contact is arranged on the upper surface of the top of the movable iron core, and the top end of the reset spring is fixedly connected to the lower surface of the top of the movable iron core. The bottom end of the reset spring is fixedly connected to the top of the coil, and the coil is arranged between the movable iron core and the static iron core. The damping device is good in damping effect and low in noise.

Description

Technical Field

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

[0002] During operation, contactors require frequent engagement and disengagement. Each engagement causes a collision between the moving and stationary iron cores, resulting in secondary bouncing and vibration between the moving and stationary contacts. This vibration severely impacts the contactor's electrical lifespan. In extreme cases, significant contact bouncing can lead to arcing and welding of the moving and stationary contacts together, preventing separation and ensuring the main circuit current cannot be interrupted, potentially causing serious engineering accidents. Therefore, vibration damping measures are necessary for contactors.

[0003] Patent CN219393279U discloses an electromagnetic contactor equipped with a first and a second damping spring. However, the cylindrical damping springs are only located at the lower ends of the stationary iron core. When a large impact force is generated, the impact force cannot be fully absorbed by the springs, which may cause the stationary iron core to directly impact the base, resulting in poor vibration damping. Therefore, a vibration damping system and contactor with better vibration damping effect are needed. Utility Model Content

[0004] The purpose of this invention is to provide a vibration reduction system and contactor to solve the problems existing in the prior art and achieve better vibration reduction effect.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a vibration damping system, including a tower-shaped spring and an elastic element. The top end of the elastic element is fixedly connected to the lower end of the stationary iron core of the contactor, and the bottom end of the elastic element is fixedly connected to the placement platform of the stationary iron core. The tower tip of the tower-shaped spring is connected to the lower end of the stationary iron core, and the tower bottom end is fixedly connected to the placement platform of the stationary iron core.

[0007] Preferably, the elastic element is a cylindrical spring, which is vertically disposed at the lower end of the stationary iron core. The top end of the cylindrical spring is fixedly connected to the bottom end of the stationary iron core, and the bottom end of the cylindrical spring is fixedly connected to the placement platform.

[0008] Preferably, two cylindrical springs are provided, respectively located at the bottom ends of the stationary iron core.

[0009] Preferably, the system further includes a guide post for the cylindrical spring to pass through, the top end of the guide post being slidably connected to the bottom end of the stationary iron core, and the bottom end of the guide post being fixedly connected to the placement platform.

[0010] Preferably, the tower tip of the tower-shaped spring is located at the center of the stationary iron core.

[0011] This utility model also provides a contactor, including a housing and a contact, a moving iron core, a stationary iron core, a coil, a return spring, and a vibration damping system as described above, all disposed within the housing. The moving iron core and the stationary iron core are disposed opposite to each other, with the stationary iron core located below the moving iron core. The contact is disposed on the top upper surface of the moving iron core. The top end of the return spring is fixedly connected to the top lower surface of the moving iron core, and the bottom end of the return spring is fixedly connected to the top of the coil. The coil is disposed between the moving iron core and the stationary iron core.

[0012] Preferably, it further includes a cover unit, which is disposed between the contact and the moving iron core.

[0013] Preferably, the housing is fixedly mounted on the placement platform.

[0014] Preferably, the placement platform has downward protrusions at both ends and is suspended in the middle, the protrusions being used to provide fixing points for the placement platform.

[0015] Preferably, it further includes a short-circuit ring, which is disposed in the top groove of the stationary iron core for generating induced current.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] This utility model includes a tower-shaped spring and an elastic element. The top end of the elastic element is fixedly connected to the lower end of the stationary iron core of the contactor, and the bottom end of the elastic element is fixedly connected to the placement platform of the stationary iron core. The tower tip of the tower-shaped spring is connected to the lower end of the stationary iron core, and the tower bottom end is fixedly connected to the placement platform of the stationary iron core. The tower-shaped spring can withstand a large load in a small space. Compared with ordinary compression springs of the same volume, it can withstand greater pressure and store more energy. Furthermore, the stiffness of the tower-shaped spring changes with the amount of deformation, providing suitable elastic force under different working conditions. In the initial stage of significant vibration or impact, the spring stiffness is low, effectively buffering and absorbing energy. As the amount of deformation increases, the stiffness gradually increases, preventing excessive deformation and providing stable support and protection for the system. The elastic element also shares some of the impact force; the two work together to further enhance the buffering effect, resulting in good vibration reduction and extending the service life of related components. The vibration damping system composed of tower-shaped springs and elastic elements can effectively absorb the vibration generated by the stationary iron core, prevent the vibration from being transmitted to the contactor housing and mounting base and other external structures, thereby reducing the vibration amplitude of the entire contactor and thus reducing noise. 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 schematic diagram of the contactor structure in some embodiments of the present invention;

[0020] Figure 2 This is a schematic diagram of the base structure in some embodiments of the present invention;

[0021] Figure 3 for Figure 1 Enlarged diagram of point A in the middle.

[0022] In the diagram: 1-Contact; 2-Cover unit; 3-Reset spring; 4-Moving iron core; 5-Stationary iron core; 6-Cylindrical spring; 7-Tower spring; 8-Placement base; 9-Short-circuit ring; 10-Coil; 11-Protrusion. Detailed Implementation

[0023] 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.

[0024] The purpose of this invention is to provide a vibration reduction system and contactor to solve the problems existing in the prior art and achieve better vibration reduction effect.

[0025] 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.

[0026] Example 1

[0027] like Figures 1-3As shown, this utility model provides a vibration damping system, including a tower-shaped spring 7 and an elastic element. The top end of the elastic element is fixedly connected to the lower end of the stationary iron core 5 of the contactor, and the bottom end of the elastic element is fixedly connected to the placement platform 8 of the stationary iron core 5. The tower tip of the tower-shaped spring 7 is connected to the lower end of the stationary iron core 5, and the tower bottom end is fixedly connected to the placement platform of the stationary iron core 5. The tower-shaped spring 7 can withstand a large load in a small space. Compared with ordinary compression springs of the same volume, it can withstand greater pressure and store more energy. Moreover, the stiffness of the tower-shaped spring 7 changes with the amount of deformation, so that it can provide appropriate elastic force under different working conditions. In the initial stage of large vibration or impact, the spring stiffness is small, which can effectively buffer and absorb energy; as the amount of deformation increases, the stiffness gradually increases, which can prevent excessive deformation and provide stable support and protection for the system. The elastic element can also share part of the impact force. The two work together to further enhance the buffering effect, resulting in good vibration damping and extending the service life of related components. The vibration damping system composed of the tower-shaped spring 7 and the elastic element can effectively absorb the vibration generated by the stationary iron core 5, prevent the vibration from being transmitted to the contactor housing and external structures such as the mounting base, thereby reducing the vibration amplitude of the entire contactor and thus reducing noise.

[0028] In some embodiments, the elastic element is a cylindrical spring 6, which is vertically disposed at the lower end of the stationary iron core 5. The top end of the cylindrical spring 6 is fixedly connected to the bottom end of the stationary iron core 5, and the bottom end of the cylindrical spring 6 is fixedly connected to the placement platform. The cylindrical spring 6 can provide a relatively stable and uniform elastic force in the axial direction. When the contactor's engagement, release, or other actions cause the stationary iron core 5 to vibrate, the cylindrical spring 6, with its elastic deformation capability, can effectively buffer these vibrations, converting the vibration energy into the elastic potential energy of the spring for storage and partial dissipation, reducing the transmission of vibration to the placement platform and the entire external structure of the contactor, thereby ensuring the smooth operation of the contactor as a whole.

[0029] It should be noted that the cylindrical spring 6 does not have to be set vertically; it can be set at a certain angle, as long as it can achieve the function of vibration reduction.

[0030] In some embodiments, two cylindrical springs 6 are provided, respectively located at both ends of the bottom of the stationary iron core 5. The two springs, located at the bottom ends of the stationary iron core 5, ensure that the supporting force on the stationary iron core 5 is distributed more evenly and symmetrically in the horizontal direction. This effectively prevents instability such as tilting or twisting of the stationary iron core 5 caused by uneven force on one side, ensuring the stability of the stationary iron core 5 during both static and operational processes. This keeps it in an accurate and appropriate position, reduces swaying, and ensures precise engagement between the moving iron core 4 and the stationary iron core 5 inside the contactor.

[0031] In some embodiments, the vibration damping system further includes a guide post through which the cylindrical spring 6 passes. The top end of the guide post is slidably connected to the bottom end of the stationary iron core 5, and the bottom end of the guide post is fixedly connected to the placement platform. The guide post provides a clear axial guide for the cylindrical spring 6, ensuring that when the cylindrical spring 6 is subjected to pressure and vibration impact from the stationary iron core 5, it can only stretch and deform along the axial direction of the guide post. This effectively prevents irregular deformation such as bending, twisting, and lateral displacement of the cylindrical spring 6, ensuring that the cylindrical spring 6 always plays a buffering and supporting role in the expected manner, maintaining stable elastic performance, thereby ensuring that the stationary iron core 5 moves smoothly in the vertical direction and ensuring the accuracy of the position during the engagement and release process.

[0032] In some embodiments, the tower tip of the tower-shaped spring 7 is located at the center of the stationary iron core 5. When the stationary iron core 5 vibrates, the tower-shaped spring 7, located at the center, can absorb and buffer vibration energy from all directions. Compared to a case where it is set off from the center, it can more evenly cope with vibration impacts from all directions, avoid the problem of insufficient vibration damping in a certain direction, and more effectively convert vibration into the elastic potential energy of the spring for storage and partial dissipation. This minimizes the transmission of vibration to the mounting base and the entire external structure of the contactor, improves the overall vibration damping performance of the contactor, and makes the contactor operate more smoothly.

[0033] In the vibration reduction system, cylindrical springs 6 are used in conjunction with the tower springs 7. The two cylindrical springs 6 are located on both sides of the tower springs 7 and are equidistant from each other. The tower springs 7 are located in the center of the stationary iron core 5. Together with the surrounding cylindrical springs 6, they form a more efficient vibration reduction system, which suppresses the vibration of the stationary iron core 5 from different angles and positions, optimizes the overall vibration reduction effect, and further ensures the stable operation of the contactor under complex working conditions.

[0034] Example 2

[0035] This embodiment also provides a contactor, including a housing and a contact 1, a moving iron core 4, a stationary iron core 5, a coil 10, a return spring 3, and a vibration damping system as described above, all disposed within the housing. The moving iron core 4 and the stationary iron core 5 are arranged opposite to each other, with the stationary iron core 5 located below the moving iron core 4. The contact 1 is disposed on the top upper surface of the moving iron core 4. The top end of the return spring 3 is fixedly connected to the top lower surface of the moving iron core 4, and the bottom end of the return spring 3 is fixedly connected to the top of the coil 10. The coil 10 is disposed between the moving iron core 4 and the stationary iron core 5. Due to the aforementioned vibration damping system, the vibration of the stationary iron core 5 during operation, whether caused by its own engagement and release actions or by external environmental vibration interference, can be effectively suppressed. The moving iron core 4 and the stationary iron core 5 are arranged opposite each other and work together to complete the core action of the contactor. The stability of the stationary iron core 5 means that the cooperation between the two is more precise and reliable, which can ensure that the moving iron core 4 operates according to the accurate stroke and force, thereby ensuring that the contact 1 can accurately close and open the circuit, avoiding problems such as adhesion or poor contact caused by vibration, and improving the stability of the contactor operation.

[0036] In some embodiments, the contactor further includes a cover unit 2 disposed between the contact 1 and the moving iron core 4. When the contactor operates, an electromagnetic field is generated around the moving iron core 4, and current flows through the contact 1, generating its own electromagnetic field. The cover unit 2 can isolate the electromagnetic fields of these two areas to a certain extent, preventing mutual interference and preventing abnormal coupling of electromagnetic fields from affecting the normal switching action of the contact 1 and the electromagnetic driving effect of the moving iron core 4. This ensures the stability of the electromagnetic performance of each part of the contactor and improves overall electromagnetic compatibility.

[0037] In some embodiments, the contactor further includes a mounting base 8, on which the housing is fixedly mounted. The mounting base 8 provides a supporting foundation for the housing, allowing the entire contactor to be placed more stably in its installation position. Especially in working environments with a certain degree of vibration and impact, the mounting base 8 can effectively prevent the contactor from shifting or tipping due to external forces, ensuring that the internal components of the contactor (such as the moving iron core 4, the stationary iron core 5, the contact 1, the coil 10, etc.) are always in a relatively stable spatial position, maintaining accurate matching relationships between them, thereby ensuring that the contactor reliably controls the circuit switching.

[0038] In some embodiments, the mounting base 8 has downward-facing protrusions 11 at both ends, with a gap in the middle. The protrusions 11 provide fixing points for the mounting base 8. This gap increases the contact area between the air and the bottom of the contactor, facilitating airflow and heat dissipation. When the contactor operates, it generates heat, which can be more easily dissipated upwards from the gap, while cool air can replenish it in time, forming a more efficient heat dissipation channel. This helps reduce the contactor's temperature, ensuring stable performance and extending its service life. Simultaneously, it avoids large-area contact between the contactor mounting base 8 and the mounting wall or floor, reducing the impact of ground moisture on the contactor. Furthermore, the gap also provides space for some external wiring to pass through.

[0039] In some embodiments, the contactor further includes a short-circuit ring 9, which is disposed in the top groove of the stationary iron core 5 to generate an induced current. When an alternating current passes through the contactor coil 10, it causes an alternating magnetic field to be generated in the iron core, which in turn causes vibration and noise in the iron core. The current induced in the short-circuit ring 9 by the alternating magnetic field generates an additional magnetic field that is out of phase with the main magnetic field. The additional magnetic field can effectively fill the magnetic field gap of the main magnetic field when it crosses zero, so that the attraction force on the iron core is relatively uniform throughout the cycle, avoiding the violent vibration of the iron core caused by the instantaneous disappearance and recovery of the attraction force. This significantly reduces the humming noise and other noise generated when the contactor is working, and also reduces the adverse effects of vibration on internal components (such as contacts 1, springs, etc.), improving the overall stability of the contactor operation.

[0040] 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 vibration reduction system, characterized in that: It includes a tower-shaped spring and an elastic element. The top end of the elastic element is used to be fixedly connected to the lower end of the stationary iron core of the contactor, and the bottom end of the elastic element is used to be fixedly connected to the placement platform of the stationary iron core. The tower tip of the tower-shaped spring is used to be connected to the lower end of the stationary iron core, and the tower bottom end is used to be fixedly connected to the placement platform of the stationary iron core.

2. The vibration reduction system according to claim 1, characterized in that: The elastic element is a cylindrical spring, which is vertically disposed at the lower end of the stationary iron core. The top end of the cylindrical spring is fixedly connected to the bottom end of the stationary iron core, and the bottom end of the cylindrical spring is fixedly connected to the placement platform.

3. The vibration reduction system according to claim 2, characterized in that: Two cylindrical springs are provided, one at each end of the bottom of the stationary iron core.

4. The vibration reduction system according to claim 2, characterized in that: It also includes a guide post for the cylindrical spring to pass through, the top end of the guide post being slidably connected to the bottom end of the stationary iron core, and the bottom end of the guide post being fixedly connected to the placement platform.

5. The vibration reduction system according to claim 1, characterized in that: The tower tip of the tower-shaped spring is located at the center of the stationary iron core.

6. A contactor, characterized in that: The device includes a housing and a contact, a moving iron core, a stationary iron core, a coil, a return spring, and a vibration damping system as described in any one of claims 1-5, wherein the moving iron core and the stationary iron core are arranged opposite to each other, and the stationary iron core is located below the moving iron core; the contact is disposed on the top upper surface of the moving iron core; the top end of the return spring is fixedly connected to the top lower surface of the moving iron core; the bottom end of the return spring is fixedly connected to the top of the coil; and the coil is disposed between the moving iron core and the stationary iron core.

7. The contactor according to claim 6, characterized in that: It also includes a cover unit, which is disposed between the contact and the moving iron core.

8. The contactor according to claim 6, characterized in that: The housing is fixedly mounted on the placement platform.

9. The contactor according to claim 6, characterized in that: The placement platform has downward protrusions at both ends and is suspended in the middle. The protrusions are used to provide fixing points for the placement platform.

10. The contactor according to claim 6, characterized in that: It also includes a short-circuit ring, which is disposed in the top groove of the stationary iron core to generate an induced current.

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