A silent contactor

Abstract

This utility model discloses a silent contactor, comprising: a coil assembly including a coil frame, the coil frame having a cavity with openings at the top and bottom; a magnetic yoke assembly having a first intermediate portion and two first ends, the two first ends being respectively connected to the first intermediate portion; the first intermediate portion extending into the cavity; a gasket fixed to the first end; an armature assembly having a second intermediate portion and two second ends, the two second ends being respectively connected to the second intermediate portion, the second intermediate portion extending into the cavity; the second intermediate portion engaging with the first intermediate portion, the second ends engaging with the first ends, and the gasket located on the movement trajectory of the bottom surface of the second end; by setting the gasket, when the armature assembly moves toward the magnetic yoke assembly, the second end first abuts against the gasket, and the gasket can withstand and absorb the energy generated during the impact between the two, thereby reducing noise.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to a silent contactor. Background Technology

[0002] The contactor includes a magnetic yoke assembly, a coil assembly, and an armature assembly. The magnetic yoke assembly and the coil assembly cooperate. When the coil assembly is energized, the magnetic yoke assembly generates a magnetic field, which attracts the armature assembly, causing the armature assembly to move toward the magnetic yoke assembly. Finally, the two are attracted together. The armature assembly has a fixed moving contact. When the armature assembly and the magnetic yoke assembly are attracted together, the moving contact and the stationary contact are also electrically connected.

[0003] However, in the existing technology, the armature assembly and the yoke assembly will generate noise when they are engaged and disengaged. In some application environments, it is required to achieve a silent effect, that is, to reduce the noise generated by the armature assembly and the yoke assembly when they are engaged and disengaged, so as to achieve a silent effect. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is how to improve and reduce noise. A silent contactor includes:

[0005] A coil assembly, the coil assembly including a coil frame, the coil frame having a cavity, the cavity being open at the top and bottom;

[0006] A magnetic yoke assembly, the magnetic yoke assembly having a first intermediate portion and two first ends, the two first ends being respectively connected to the first intermediate portion; the first intermediate portion extending into the cavity; and a gasket fixed to the first ends;

[0007] An armature assembly is provided with a second intermediate portion and two second ends, the two second ends being respectively connected to the second intermediate portion, the second intermediate portion extending into the chamber; the second intermediate portion cooperates with the first intermediate portion, the second ends cooperate with the first ends, and the gasket is located on the movement trajectory of the bottom surface of the second ends.

[0008] The first end is provided with a fixing block, which extends away from the first middle part, and the gasket is sleeved and fixed to the fixing block; the sleeved direction of the gasket is perpendicular to the direction of movement of the bottom surface of the second end toward the gasket.

[0009] The gasket includes an impact portion and two bending portions. The two bending portions are respectively connected to the two ends of the impact portion. The impact portion is located on the movement trajectory of the bottom surface of the second end. The bending portions cooperate with the bottom surface of the fixing block.

[0010] The end of the bent portion abuts against the bottom surface of the fixing block, and a portion of the bent portion is spaced apart from the bottom surface of the fixing block.

[0011] The impact part is either flat or curved.

[0012] It also includes a PCB board, which is equipped with a rectifier module. The input terminal of the rectifier module is connected to the power supply circuit, and the output terminal of the rectifier module is connected to the coil of the coil assembly.

[0013] The PCB board is also equipped with a varistor, which is connected in parallel with the input terminal of the rectifier module.

[0014] The inner wall of the cavity is provided with a guide groove, and the armature assembly slides along the guide groove.

[0015] The guide groove is coated with damping grease.

[0016] The first middle part is provided with a groove, which is V-shaped or U-shaped, and the second middle part is provided with a protrusion that mates with the groove.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. The present invention provides a silent contactor in which, by setting a gasket, when the armature assembly moves toward the magnetic yoke assembly, the second end first abuts against the gasket, and the gasket can withstand and absorb the energy generated during the impact between the two, thereby reducing noise.

[0019] 2. The silent contactor provided by this utility model uses a sleeved design to improve the stability of the gasket and prevent it from falling off during impact. Alternatively, it can be fixed by other methods, such as welding or gluing.

[0020] 3. The silent contactor provided by this utility model has a gasket with this structure, which makes it easier to fix. Moreover, the two bent parts do not abut against each other. During the impact process, the bent parts can also move towards each other, further improving the shock absorption and buffering effect.

[0021] 4. The silent contactor provided by this utility model adopts this structure for the gasket, which creates a partial gap between the gasket and the fixing block. During the impact process, the shock absorption and buffering effect is further improved, thereby further reducing noise.

[0022] 5. The silent contactor provided by this utility model has a rectifier module that, regardless of whether it is an AC or DC input, ultimately supplies power to the coil with DC power. The advantage of DC power supply is that the starting current is relatively small, the noise generated during engagement is small, and the energy consumption is low.

[0023] 6. The silent contactor provided by this utility model has an inductive coil. When the coil is de-energized and the magnetic yoke assembly and armature assembly are released, a large reverse electromotive force is generated at both ends of the coil. The varistor can limit the electromotive force, thus achieving the effect of delaying release and reducing noise.

[0024] 7. The silent contactor provided by this utility model uses damping grease to mainly play a damping role in the engagement and release process, thereby weakening the respective motion energy and reducing noise; it can also ensure that the product maintains smooth operation during long-term work and extend the product's lifespan. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This utility model provides a structural schematic diagram of a silent contactor;

[0027] Figure 2 A cross-sectional view of a silent contactor provided by this utility model;

[0028] Figure 3 A cross-sectional view of a silent contactor provided by this utility model from another angle;

[0029] Figure 4 A cross-sectional view of another form of a silent contactor provided by this utility model;

[0030] Figure 5 A schematic diagram of the coil frame provided by this utility model;

[0031] Figure 6 The circuit schematic diagram provided for this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 11. Coil frame; 12. Magnetic yoke assembly; 13. Gasket; 14. Armature assembly; 15. PCB board; 16. Spring; 17. Moving contact; 18. Stationary contact; 19. Housing; 111. Chamber; 112. Guide groove; 121. First intermediate part; 122. First end; 123. Fixing block; 131. Impact part; 132. Bending part; 141. Second intermediate part; 142. Second end; 151. Rectifier module; 152. Varistor; 191. Receiving cavity; 1211. Groove; 1221. First inclined surface; 1411. Protrusion; 1421. Second inclined surface. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1

[0039] This embodiment provides a silent contactor, as shown in the attached diagram. Figures 1-6 As shown, it includes:

[0040] The coil assembly includes a coil frame 11 and a coil wound on the coil frame 11. The coil is powered by a power supply circuit. This power supply circuit can be electrically connected via terminals on a contactor; this is existing technology and will not be described in detail in this embodiment. The coil frame 11 has a chamber 111, which is open at both the top and bottom. Specifically, the chamber 111 has a through-hole structure.

[0041] The magnetic yoke assembly 12 has a first intermediate portion 121 and two first end portions 122, which are respectively connected to the first intermediate portion 121. The two first end portions 122 and the first intermediate portion 121 cooperate to form a mountain-shaped structure. The first intermediate portion 121 extends into the chamber 111, while the two first end portions 122 are located on the outside of the coil assembly, i.e., on the outside of the coil. A gasket 13 is fixed to each of the two first end portions 122.

[0042] The armature assembly 14 has a second intermediate portion 141 and two second end portions 142. The two second end portions 142 are connected to the second intermediate portion 141, forming an inverted V-shaped structure, thus correspondingly positioning the armature assembly 14 with the yoke assembly 12. The second intermediate portion 141 extends into the chamber 111, meaning both the first intermediate portion 121 and the second intermediate portion 141 are located within the chamber 111, allowing the second intermediate portion 141 to engage with the first intermediate portion 121. The second end portions 142 engage with the first end portions 122; the first end portion 122 on the left engages with the second end portion 142 on the left, and the first end portion 122 on the right engages with the second end portion 142 on the right. The gasket 13 is located on the movement trajectory of the bottom surface of the second end portion 142. In this embodiment, the magnetic yoke assembly 12 is fixedly connected to the coil frame 11. When the coil is energized, the magnetic yoke assembly 12 generates a magnetic field, causing the armature assembly 14 to move towards the magnetic yoke assembly 12, that is, the armature assembly 14 moves vertically downwards towards the magnetic yoke assembly 12. The armature assembly 14 is linked with the moving contact, and when the two come into contact, an attraction effect is formed. When the coil is de-energized, a release effect is formed, and the armature assembly 14 returns to its initial position. This is prior art. Here, when the armature assembly 14 and the magnetic yoke assembly 12 are attracted, the bottom surface of the second end 142 abuts against the pad 13, forming a buffering and shock-absorbing effect. Through the setting of the pad 13, when the armature assembly 14 moves towards the magnetic yoke assembly 12, the second end 142 first abuts against the pad 13. The pad 13 can withstand and absorb the energy generated during the impact between the two, thereby reducing noise.

[0043] Specifically, as shown in the attached document Figure 2As shown, the first end 122 is provided with a fixing block 123, which extends away from the first middle portion 121. The gasket 13 is sleeved and fixed to the fixing block 123. The sleeve direction of the gasket 13 is perpendicular to the direction of movement of the bottom surface of the second end 142 toward the gasket 13. In this embodiment, the gasket 13 moves horizontally toward the fixing block 123, while the second end 142 moves vertically downwards, and the two are vertically aligned. This sleeved arrangement improves the fixing stability of the gasket 13 and prevents it from falling off during impact. Alternatively, it can be fixed by other methods, such as welding or gluing.

[0044] Specifically, as shown in the attached document Figures 2-3 As shown, the gasket 13 includes an impact portion 131 and two bent portions 132. The two bent portions 132 are connected to both ends of the impact portion 131. The impact portion 131 is located on the movement trajectory of the bottom surface of the second end 142, above the top surface of the fixing block 123. The bent portions 132 engage with the bottom surface of the fixing block 123, bending from the top surface of the fixing block 123 through the side surface to the bottom surface, forming a bent fixing effect. It should be noted that the ends of the two bent portions 132 (specifically, the ends of the bent portions 132 away from the impact portion 131) do not abut against each other. This structure of the gasket 13 makes fixing more convenient, and since the two bent portions 132 do not abut against each other, they can also move towards each other during impact, further improving the shock absorption and buffering effect.

[0045] Specifically, the end of the bent portion 132 abuts against the bottom surface of the fixing block 123, with a gap between a portion of the bent portion 132 and the bottom surface of the fixing block 123. This gap refers to the bent portion 132 forming a raised effect. This structure of the gasket 13 creates a partial gap between the gasket 13 and the fixing block 123, further improving the shock absorption and cushioning effect during impact, thereby further reducing noise. A gap is also provided between the bent portion 132 and the side surface of the fixing block 123.

[0046] Specifically, as shown in the attached document Figure 3 As shown, the impact part 131 is planar. In this case, the impact part 131 fits against the top surface of the fixing block 123, forming an impact engagement effect. (See attached diagram) Figure 4As shown, the impact part 131 is an arc surface, which is a convex structure, forming a raised structure. A gap is also formed between the impact part 131 and the top surface of the fixing block 123, ensuring a certain gap before impact and absorbing some of the impact energy. After the entire movement process is completed, the impact part 131 (arc surface) can be flattened to ensure the product parameters. The curvature, height, and other parameters of the arc surface can be adjusted according to actual needs. With this structure, the gasket 13 has a certain elasticity, that is, it will deform after being subjected to impact force. When the pressure applied to the gasket 13 disappears, the gasket 13 can return to its original shape, preparing for the next impact.

[0047] Specifically, as shown in the attached document Figure 2 , Figure 6 As shown, the system also includes a PCB board 15, which has a rectifier module 151. The input terminal of the rectifier module 151 is connected to the power supply circuit, and the output terminal of the rectifier module 151 is connected to the coil of the coil assembly. Regardless of whether the input is AC or DC, the rectifier module 151 ultimately supplies DC power to the coil. The advantages of DC power supply are relatively small starting current, low noise during engagement, and low energy consumption. The rectifier module 151 can be a rectifier bridge or a full-wave rectifier composed of four diodes. Specifically, the contactor has two input terminals and two output terminals. The input terminals connect the PCB board 15 to the power supply circuit, and the output terminals of the PCB board 15 are electrically connected to the output terminals. The output terminals are electrically connected to both ends of the coil, forming the entire electrical circuit. That is, the coil is the load, the power supply circuit rectifies the current through the rectifier module 151 to form DC power, and then the DC power supplies the coil.

[0048] Specifically, as shown in the attached document Figure 2 , Figure 6 As shown, the PCB board 15 also includes a varistor 152, which is connected in parallel with the input terminal of the rectifier module 151. Since the coil is an inductive load, when the coil is de-energized and the magnetic yoke assembly 12 and armature assembly 14 are released, a large reverse electromotive force will be generated at both ends of the coil. The varistor 152 can limit the electromotive force, ultimately achieving the effect of delaying release, thereby reducing noise.

[0049] Specifically, as shown in the attached document Figure 5 As shown, the inner wall of the chamber 111 is provided with guide grooves 112, and there are two guide grooves 112, which are located on the front and rear sides of the inner wall of the chamber 111, respectively. The armature assembly 14 slides along the guide grooves 112. In this embodiment, the front and rear sides of the armature assembly 14 slide along the guide grooves 112 to prevent the armature assembly 14 from shaking during the sliding process.

[0050] Specifically, the guide groove 112 is coated with damping grease. The damping grease mainly serves to dampen the motion during the engagement and disengagement process, thereby reducing the kinetic energy and noise; it also ensures that the product maintains smooth operation during long-term use and extends the product's lifespan.

[0051] Specifically, as shown in the attached document Figure 2 As shown, the first intermediate portion 121 is provided with a groove 1211, which is V-shaped or U-shaped, and the second intermediate portion 141 is provided with a protrusion 1411 that mates with the groove 1211. The groove 1211 and the protrusion 1411 mate with each other to form a mating effect.

[0052] Specifically, as shown in the attached document Figure 2 As shown, both first ends 122 are provided with first inclined surfaces 1221, which cooperate to form a figure-eight structure. The second end 142 is provided with a corresponding second inclined surface 1421. When the armature assembly 14 and the magnetic yoke assembly 12 are attracted, the first inclined surface 1221 and the second inclined surface 1421 are in contact. The second inclined surface 1421 is connected to the bottom surface of the second end 142, while the first inclined surface 1221 is connected to the top surface of the fixing block 123.

[0053] Specifically, as shown in the attached document Figure 2 As shown, a spring 16 is also fixed between the coil frame 11 and the armature assembly 14. One end of the spring 16 abuts against the top surface of the coil frame 11, and the other end of the spring 16 is sleeved on the second middle part 141, which plays a role in resetting the armature assembly 14. During the attraction process, the spring 16 plays a buffering role, and during the release process, the spring 16 plays a resetting role.

[0054] Specifically, the top surface of the armature assembly 14 is linked with the moving contact 17, and the armature assembly 14 drives the moving contact 17 to move, thereby realizing the connection or disconnection between the moving contact 17 and the stationary contact 18.

[0055] Specifically, as shown in the attached document Figures 1-3 As shown, it also includes a housing 19, which has a receiving cavity 191, in which the coil assembly, the magnetic yoke assembly 12, the armature assembly 14, and the PCB board 15 are all housed.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A silent contactor, characterized in that, include: A coil assembly, the coil assembly including a coil frame (11), the coil frame (11) having a cavity (111) with openings at the top and bottom; A magnetic yoke assembly (12) is provided with a first intermediate part (121) and two first ends (122), the two first ends (122) being connected to the first intermediate part (121) respectively; the first intermediate part (121) extends to the chamber (111); a gasket (13) is fixed to the first end (122); The armature assembly (14) has a second intermediate part (141) and two second ends (142), the two second ends (142) are respectively connected to the second intermediate part (141), the second intermediate part (141) extends to the chamber (111); the second intermediate part (141) cooperates with the first intermediate part (121), the second ends (142) cooperate with the first ends (122), and the gasket (13) is located on the movement trajectory of the bottom surface of the second ends (142).

2. The silent contactor according to claim 1, characterized in that, The first end (122) is provided with a fixing block (123), the fixing block (123) extends in a direction away from the first middle part (121), and the gasket (13) is sleeved and fixed on the fixing block (123); the sleeve direction of the gasket (13) is perpendicular to the movement direction of the bottom surface of the second end (142) toward the gasket (13).

3. The silent contactor according to claim 2, characterized in that, The gasket (13) includes an impact part (131) and two bending parts (132). The two bending parts (132) are respectively connected to the two ends of the impact part (131). The impact part (131) is located on the movement trajectory of the bottom surface of the second end (142). The bending parts (132) cooperate with the bottom surface of the fixing block (123).

4. The silent contactor according to claim 3, characterized in that, The end of the bent portion (132) abuts against the bottom surface of the fixing block (123), and a portion of the bent portion (132) is spaced apart from the bottom surface of the fixing block (123).

5. The silent contactor according to claim 3, characterized in that, The impact part (131) is a plane or an arc surface.

6. The silent contactor according to claim 1, characterized in that, It also includes a PCB board (15), which is provided with a rectifier module (151). The input end of the rectifier module (151) is connected to the power supply circuit, and the output end of the rectifier module (151) is connected to the coil of the coil assembly.

7. The silent contactor according to claim 6, characterized in that, The PCB board (15) is also provided with a varistor (152), which is connected in parallel with the input terminal of the rectifier module (151).

8. The silent contactor according to claim 1, characterized in that, The inner wall of the chamber (111) is provided with a guide groove (112), and the armature assembly (14) slides along the guide groove (112).

9. The silent contactor according to claim 8, characterized in that, The guide groove (112) is coated with damping grease.

10. The silent contactor according to claim 1, characterized in that, The first intermediate part (121) is provided with a groove (1211), the groove (1211) is V-shaped or U-shaped, and the second intermediate part (141) is provided with a protrusion (1411) that cooperates with the groove (1211).

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