Limit structure and direct-acting relay

Abstract

This application discloses a limiting structure and a direct-acting relay, relating to the field of relay technology. The limiting structure includes a housing and a moving contact assembly. The housing forms a receiving cavity, with a stationary contact on one side of the cavity. The moving contact assembly is movably disposed within the receiving cavity, with a moving contact facing the stationary contact. Two limiting portions are provided on the inner side of the housing, spaced apart, and together with the housing, form a limiting groove with an opening facing the moving contact assembly. The moving contact assembly has a stop block that slides within the limiting groove. In the technical solution provided by this application, the cooperation of the limiting groove and the stop block ensures that contact offset is reduced when the moving contact assembly moves up and down, thereby ensuring reliable closing and disengagement of the moving contact from the stationary contact.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a limit structure and a direct-acting relay. Background Technology

[0002] A direct-acting relay is a type of electromagnetic relay. Its core characteristic is that the armature and moving contact assembly in the electromagnetic component are directly connected, achieving contact closure and opening through linear motion, rather than through traditional rotation or lever mechanisms. This design gives direct-acting relays advantages such as large contact gaps, high contact pressure, and compact structure. They are particularly suitable for applications requiring large contact gaps and insulation clearances, as well as high response speeds and space constraints, such as photovoltaic inverters, energy storage systems, charging piles, electricity meters, and power systems in new energy applications. The direct-acting relay uses the electromagnetic force generated by the electromagnetic system to drive the armature in linear motion, thereby causing the moving contact to contact or separate from the stationary contact, achieving the circuit's control function.

[0003] In related technologies, the moving contact components of a product are usually limited and guided by guide posts, so that the moving contact components move along a predetermined trajectory. However, the limiting and guiding effect of the guide posts is limited, and the moving contact components are prone to deviation. Utility Model Content

[0004] This application proposes a limiting structure and a direct-acting relay, aiming to provide a limiting structure that can prevent the moving contact component from deviating about its motion guide.

[0005] One embodiment of this application proposes a limiting structure applied to a direct-acting relay, comprising:

[0006] The housing has a receiving cavity, and a stationary contact is provided on one side of the receiving cavity;

[0007] A movable contact assembly is movably disposed in the receiving cavity, and the movable contact assembly has a movable contact facing the stationary contact.

[0008] The inner side of the housing is provided with two limiting parts, which are spaced apart and together with the housing to form a limiting groove with an opening facing the moving contact component. The moving contact component is provided with a stop block, which is slidably disposed in the limiting groove.

[0009] In one embodiment, the limiting structure includes two stationary contacts, and the two limiting portions are located between the two stationary contacts;

[0010] At least a portion of the structure of the stop block is accommodated within the limiting groove and is capable of moving within the limiting groove.

[0011] In one embodiment, the limiting portion has a first side facing the limiting groove and a second side facing away from the limiting groove, and the second side of each limiting portion is provided with a snap-fit ​​protrusion.

[0012] In one embodiment, a wear-resistant layer is provided on the second side of each of the limiting portions, the wear-resistant layer being used to contact the stop block.

[0013] In one embodiment, the two limiting parts and the housing are integrally formed.

[0014] In one embodiment, the limiting part is a limiting plate.

[0015] In one embodiment, the moving contact assembly further includes a push rod and a conductive bridge, the push rod being connected to the conductive bridge, and a stop block being disposed on the side of the conductive bridge facing away from the push rod; the moving contact is located on the same side as the stop block.

[0016] In one embodiment, the stop has a slot, one end of the push rod is provided with a mounting bracket, the mounting bracket is provided with a plug-in portion facing the stop, and the plug-in portion is fixed to the slot.

[0017] In one embodiment, the material of the two limiting portions is an insulating material.

[0018] An embodiment of this application also proposes a direct-acting relay, including a drive mechanism and a limiting structure as described above. The drive mechanism is disposed in the receiving cavity, and the movable end of the drive mechanism is connected to the moving contact assembly and is used to drive the moving contact to contact or disengage from the stationary contact.

[0019] This application provides several embodiments that propose a limiting structure and a direct-acting relay. The limiting structure includes a housing and a moving contact assembly. The housing has a receiving cavity, and a stationary contact is provided on one side of the receiving cavity. The moving contact assembly is movably disposed within the receiving cavity and has a moving contact. A stop is provided on the side of the moving contact assembly facing the stationary contact. Correspondingly, two limiting parts are provided on the inner side of the housing and along the movement path of the moving contact assembly. The two limiting parts are spaced apart to form a limiting groove. The stop of the moving contact assembly is restricted within the limiting groove. Through the cooperation of the stop and the limiting groove, the moving contact assembly is provided with limiting guidance when it moves up and down, thereby ensuring the reliable closing and disengagement of the moving contact and the stationary contact. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of an embodiment of the limiting structure provided in this application;

[0022] Figure 2 This is a schematic diagram showing the position of the limiting groove;

[0023] Figure 3 This is a schematic diagram of the moving contact component in the limiting structure;

[0024] Figure 4 for Figure 3 Exploded view of the intermediate-motion contact assembly;

[0025] Figure 5 This is a schematic diagram of the shell structure.

[0026] Explanation of icon numbers:

[0027] 100. Limiting structure; 1. Housing; 11. Stationary contact; 1a. First cavity; 1b. Second cavity; 2. Moving contact assembly; 21. Moving contact; 22. Push rod; 23. Conductive bridge; 231. Connecting piece; 24. Mounting bracket; 241. Insertion part; 25. Compression spring; 26. Reverse spring; 3. Limiting part; 31. Snap-fit ​​protrusion; 3a. Limiting groove; 4. Stop block; 4a. Slot; 4b. Hollowed-out part; 200. Drive mechanism; 310. First lead-out end; 320. Second lead-out end. Detailed Implementation

[0028] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] A direct-acting relay is an electromagnetic relay whose core feature is that the armature in the drive mechanism drives the moving contact assembly to achieve the closing and opening of the contacts through linear motion, rather than through traditional rotational or lever mechanisms. This design gives direct-acting relays advantages such as large contact gaps, high contact pressure, and compact structure, making them particularly suitable for applications requiring large electrical clearances between contacts, high contact pressure, and ample space, such as photovoltaic inverters, energy storage systems, charging piles, meters, and power systems in new energy applications. Direct-acting relays use electromagnetic force generated by an electromagnetic system to drive the armature to move linearly, thereby causing the moving contact to contact or separate from the stationary contact, achieving the circuit's control function. In related technologies, the moving contact assembly of the product usually uses guide posts for limiting and guiding, allowing the moving contact assembly to move along a predetermined trajectory. However, guide posts cannot prevent the moving contact assembly from rotating around its axis of motion, and the limiting and guiding effect of guide posts is limited, making the moving contact assembly prone to misalignment.

[0032] To address the aforementioned problems, this application proposes a limiting structure 100 to solve the technical issues mentioned above.

[0033] Please see Figure 1 In one embodiment of this application, the limiting structure 100 includes a housing 1 and a moving contact assembly 2. The housing 1 forms a receiving cavity, and a stationary contact 11 is provided on one side of the receiving cavity. The moving contact assembly 2 is movably disposed in the receiving cavity, and a moving contact 21 is provided on the moving contact assembly 2 facing the stationary contact 11. The inner side of the housing 1 is provided with two limiting parts 3, which are spaced apart. The two limiting parts 3 and the housing 1 enclose a limiting groove 3a with an opening facing the moving contact assembly 2. The moving contact assembly 2 is provided with a stop 4, which is slidably disposed in the limiting groove 3a.

[0034] It should be noted that the opening of the limiting groove 3a always faces the moving contact component 2, so that the stop 4 in the moving contact component 2 can cooperate with the limiting groove 3a to achieve anti-rotation sliding limit. The length direction of the limiting groove 3a can be along the direction perpendicular to the line connecting the two stationary contacts 11, or along the direction collinear with the line connecting the two stationary contacts 11. This application does not limit this. In one embodiment of this application, the length direction of the limiting groove 3a is along the direction perpendicular to the line connecting the two stationary contacts 11. For details, please refer to further reading. Figure 1 and Figure 5 The length of the limiting groove 3a is set perpendicular to the line connecting the two stationary contacts 11, which can more effectively limit the offset of the moving contact assembly 2. When the moving contact assembly 2 moves up and down within the limiting groove 3a, the stop block 4 is in close contact with the vertical sidewall of the limiting groove 3a, thereby preventing the moving contact assembly 2 from swinging around its direction of movement. This design ensures precise alignment of the moving contact 21 and the stationary contact 11 when closing and disengaging, improves the reliability and stability of the contact, reduces the risk of poor contact or failure caused by the rotation of the moving contact assembly 2, and thus enhances the overall performance and service life of the relay.

[0035] Furthermore, when the housing 1 is in the closed state, the inner wall of the housing 1 will abut against the two limiting parts 3, so that the limiting groove 3a forms a square groove with an upward opening and closed on all sides. The stop block 4 moves up and down in the square groove, thereby limiting the moving contact component 2 in the upper and lower directions.

[0036] This application provides several embodiments that propose a limiting structure 100 and a direct-acting relay. The limiting structure 100 includes a housing 1 and a moving contact assembly 2. The housing 1 has a receiving cavity, and a stationary contact 11 is provided on one side of the receiving cavity. The moving contact assembly 2 is movably disposed in the receiving cavity and has a moving contact 21. A stop 4 is provided on the side of the moving contact assembly 2 facing the stationary contact 11. Correspondingly, two limiting parts 3 are provided on the inner side of the housing 1 and on the movement path of the moving contact assembly 2. The two limiting parts 3 are spaced apart to form a limiting groove 3a. The stop 4 of the moving contact assembly 2 is restricted within the limiting groove 3a. Since the limiting groove 3a is perpendicular to the axial direction of the moving contact assembly 2, the cooperation between the stop 4 and the limiting groove 3a can ensure that the moving contact assembly 2 will not deviate when moving up and down, thereby ensuring the reliable closing and disengagement of the moving contact 21 and the stationary contact 11.

[0037] In one embodiment of this application, the moving contact assembly 2 includes two sets of moving contacts 21, and correspondingly, the housing 1 is provided with two sets of stationary contacts 11. Each set of moving contacts 21 includes two moving contacts 21, and each set of stationary contacts 11 includes two stationary contacts 11. This design can significantly improve the electrical performance and reliability of the relay. By setting two sets of contacts, current can be shunted, thereby reducing the current density of a single contact, reducing contact wear and arcing, and extending the service life of the relay. At the same time, the dual-contact design can provide higher contact reliability. Even if one contact fails to make contact properly, the other contact can still ensure normal circuit conduction, thereby improving the stability and safety of the relay under harsh operating conditions such as high current and high frequency switching. This solution, through the cooperation of the stop block 4 and the limiting groove 3a, can ensure that the two sets of moving contacts 21 and the two conductive bridges 23 will not shift, ensuring the reliability of the engagement of the moving contacts 21 and the stationary contacts 11.

[0038] It should be noted that the limiting part 3 can be block-shaped or plate-shaped, and this application does not limit it in this way. In one embodiment of this application, the limiting part 3 is a limiting plate. First, the structure of the limiting plate is relatively simple, easy to process and manufacture, and can effectively reduce production costs. Second, the shape and size of the limiting plate can be flexibly adjusted according to specific needs, which facilitates the optimization of the shape and size of the limiting groove 3a, thereby better adapting to the movement trajectory and anti-rotation requirements of the moving contact assembly 2. In addition, the planar structure of the limiting plate can provide more stable support and more uniform contact pressure, which helps to reduce wear and improve limiting accuracy, further enhancing the reliability and service life of the relay.

[0039] In the technical solution of this application, every two stationary contacts 11 are led out through the first lead-out end 310, and the other two stationary contacts 11 are led out through the second lead-out end 320. To fix the first lead-out end 310 and the second lead-out end 320, the limiting part 3 has a first side facing the limiting groove 3a and a second side facing away from the limiting groove 3a. Each limiting part 3 has a snap-fit ​​protrusion 31 on its second side. For details, please refer to further reference. Figure 1 Each lead is secured by a snap-fit ​​protrusion 31. This design not only simplifies the assembly process and improves production efficiency, but also enhances the connection strength between the lead and the housing 1, ensuring that the lead will not loosen or fall off due to vibration or external force during relay operation. Furthermore, the snap-fit ​​structure reduces reliance on additional fixing components, lowers production costs, and improves the overall reliability and stability of the relay, making it more suitable for stable operation in various complex working environments.

[0040] During the movement of the moving contact structure, as the moving contact 21 closes and opens with the stationary contact 11, the sidewall of the stop block 4 may come into contact with the inner sidewall of the two limiting parts 3 facing the limiting groove 3a. Therefore, a wear-resistant layer (not shown in the figure) is provided on the second side of each limiting part 3 to facilitate contact with the stop block 4. During the movement of the moving contact assembly 2, the sidewall of the stop block 4 frequently contacts the inner sidewall of the limiting part 3, resulting in friction and wear. By providing a wear-resistant layer on the inner sidewall of the limiting part 3, wear can be effectively reduced, extending the service life of the limiting structure 100. Furthermore, the wear-resistant layer can reduce the coefficient of friction, decrease movement resistance, and make the movement of the moving contact assembly 2 smoother, thereby improving the overall performance and stability of the relay.

[0041] In one embodiment of this application, the two limiting parts 3 and the housing 1 are integrally formed, which significantly improves the overall stability and reliability of the limiting structure 100. The integrally formed structure reduces assembly errors and the possibility of loosening between components, ensuring the precise position and dimensional stability of the limiting groove 3a. Furthermore, the integral forming process simplifies manufacturing, reduces production costs, and enhances the strength and durability of the structure, enabling it to better withstand mechanical stress and environmental influences during long-term use, thereby extending the relay's service life and ensuring its stable operation under various working conditions.

[0042] Furthermore, the moving contact assembly 2 also includes a push rod 22 and a conductive bridge 23. The push rod 22 is connected to the conductive bridge 23, and a stop block 4 is located on the side of the conductive bridge 23 facing away from the push rod 22. The moving contact 21 is located on the same side as the stop block 4. The push rod 22 is connected to the movable end of the drive mechanism 200 and is driven by the drive mechanism 200. The push rod 22 drives the conductive bridge 23 to move, so as to realize the closing or disengagement of the moving contact 21 of the conductive bridge 23 from the stationary contact 11 in the housing 1. To fix the stop block 4, the moving contact assembly 2 also includes a mounting bracket 24. For details, please refer to further details. Figure 4 The mounting bracket 24 is provided with a plug-in part 241 facing the stop block 4. The stop block 4 is provided with a slot 4a. The plug-in part 241 is fixed to the slot 4a. The stop block 4, push rod 22, and conductive bridge 23 all have the same movement trend.

[0043] In one embodiment of this application, to achieve product lightweighting and plastic molding stability, the stop 4 also has a hollow portion 4b. For details, please refer to further reading. Figure 4 By incorporating a hollow portion 4b within the stop block 4, the amount of material used can be significantly reduced, thereby lowering the weight of the stop block 4. This not only helps reduce the overall weight of the relay and improve molding stability but also reduces production costs to some extent. Furthermore, the lightweight design reduces the energy required by the drive mechanism to operate the moving contact components, improving the relay's energy efficiency and further enhancing its performance in applications such as high-frequency switching.

[0044] To ensure the reliability and safety of the electrical connection and prevent relay short circuits, both the limiting part 3 and the stop 4 are made of insulating materials. These materials can be polycarbonate (PC), polybutylene terephthalate (PBT), acrylonitrile-butadiene-styrene copolymer (ABS), PET, PA, PPS, and other insulating plastics. These materials have excellent insulation properties, effectively preventing current leakage and short circuits, ensuring the safe operation of the relay. Simultaneously, they possess high mechanical strength and heat resistance, capable of withstanding the mechanical stress and heat generated during relay operation, ensuring structural stability and durability. Furthermore, these plastic materials have good processing performance and are easy to mold into complex structures, facilitating the precise design and manufacturing of the limiting part 3 and the stop 4, further improving the overall performance and reliability of the relay.

[0045] This application also proposes a direct-acting relay, which includes a drive mechanism 200 and a limiting structure 100 as described above. The drive mechanism 200 is disposed in the receiving cavity, and the movable end of the drive mechanism 200 is connected to the moving contact assembly 2 and is used to drive the moving contact 21 to contact or disengage from the stationary contact 11. The specific structure of the limiting structure 100 is as described in the above embodiments. Since this direct-acting relay adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0046] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A limiting structure applied to a direct-acting relay, characterized in that, include: The housing has a receiving cavity, and a stationary contact is provided on one side of the receiving cavity; A movable contact assembly is movably disposed in the receiving cavity, and the movable contact assembly has a movable contact facing the stationary contact. The inner side of the housing is provided with two limiting parts, which are spaced apart and together with the housing to form a limiting groove with an opening facing the moving contact component. The moving contact component is provided with a stop block, which is slidably disposed in the limiting groove.

2. The limiting structure as described in claim 1, characterized in that, The limiting structure includes two stationary contacts, and the two limiting parts are located between the two stationary contacts; At least a portion of the structure of the stop block is accommodated within the limiting groove and is capable of moving within the limiting groove.

3. The limiting structure as described in claim 2, characterized in that, The limiting part has a first side facing the limiting groove and a second side facing away from the limiting groove, and the second side of each limiting part is provided with a snap-fit ​​protrusion.

4. The limiting structure as described in claim 3, characterized in that, Each of the limiting portions has a wear-resistant layer on its second side, which is used to contact the stop block.

5. The limiting structure as described in any one of claims 1 to 4, characterized in that, The two limiting parts and the shell are integrally formed.

6. The limiting structure as described in any one of claims 1 to 4, characterized in that, The limiting part is a limiting plate.

7. The limiting structure as described in any one of claims 1 to 4, characterized in that, The moving contact assembly further includes a push rod and a conductive bridge. The push rod is connected to the conductive bridge, and the stop block is located on the side of the conductive bridge opposite to the push rod. The moving contact is located on the same side as the stop block.

8. The limiting structure as described in claim 7, characterized in that, The stop block has a slot, and one end of the push rod is provided with a mounting bracket. The mounting bracket has a plug-in part facing the stop block, and the plug-in part is fixed to the slot.

9. The limiting structure as described in any one of claims 1 to 4, characterized in that, The material of the two limiting parts is an insulating material.

10. A direct-acting relay, characterized in that, The device includes a driving mechanism and a limiting structure as described in any one of claims 1 to 9. The driving mechanism is disposed in the receiving cavity, and the movable end of the driving mechanism is connected to the moving contact assembly and is used to drive the moving contact to contact or disengage from the stationary contact.

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