Electromagnetic ac contactor

Abstract

The utility model discloses an electromagnetic alternating current contactor belongs to contactor field includes contactor casing, and the both sides surface top of contactor casing is equipped with the normally open auxiliary contact, and the both sides surface bottom of contactor casing is equipped with the normally closed auxiliary contact, and the both sides of normally open auxiliary contact all are equipped with the partition, and the heat field around arc extinguishing piece is helped to maintain stable through the base with the limiting plate, makes the arc extinguishing process more efficient stable, thereby guarantees the reliable operation of electromagnetic alternating current contactor whole, reduces the failure probability caused by arc extinguishing problem, makes whole structure can always keep the close connection state in the working process, effectively resists the component slackening that the external force factor possibly leads to because vibration impact etc, has promoted the stability and reliability of electromagnetic alternating current contactor operation under the complex working condition, has ensured the moving contact mounting seat and relevant element position and the cooperative operation in the working process, has guaranteed the efficient performance and long service life of contactor whole.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, specifically an electromagnetic AC contactor. Background Technology

[0002] In the fields of power systems and electrical control, contactors are a key electrical component. They are primarily used for frequently connecting and disconnecting AC and DC circuits, offering advantages such as large control capacity, high operating frequency, and reliable operation. They are widely used in motor control, power lighting systems, automatic control systems, and electrical control circuits of various industrial equipment. Contactors can achieve remote control and can be used in conjunction with other electrical components such as relays and fuses to form complex electrical control devices to meet diverse control requirements.

[0003] During operation, electromagnetic AC contactors are prone to problems such as contact wear, armature jamming, and coil overheating due to frequent contact switching and repeated electromagnetic mechanism operation. Regular maintenance and repair are required, which not only increases maintenance costs and workload, but may also require downtime during maintenance, affecting the normal operation of the equipment and reducing production efficiency.

[0004] Therefore, this utility model provides an electromagnetic AC contactor to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides an electromagnetic AC contactor, which aims to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: It includes a contactor housing, with normally open auxiliary contacts at the top of both side surfaces and normally closed auxiliary contacts at the bottom of both side surfaces. A partition plate is provided on both sides of each normally open auxiliary contact, with a cavity between each pair of partition plates. A limiting plate is movably engaged with the upper surface of the contactor housing. Support legs are provided at both ends of the limiting plate, with one end of each support leg movably engaged in the cavity on both sides of the partition plate. A locking block is provided on both sides of the limiting plate away from the support legs. A locking groove is provided on both sides of the upper surface of the contactor housing, with the inner wall of the locking groove movably connected to the locking block. An installation slot is opened on the upper surface of the limiting plate. A moving contact mounting seat is provided on the upper surface of the contactor housing, with a base movably sleeved on one side of the moving contact mounting seat.

[0009] As a preferred technical solution of this application, the base has bent edges on both sides, and the inner sidewall of the base has snap-fit ​​elastic members on both sides. One side of the snap-fit ​​elastic member has an abutting inner arc end, and the upper surface of the base has a hook-shaped snap-fit ​​end in the middle.

[0010] As a preferred technical solution of this application, the upper surface of the hook-shaped snap-fit ​​end extends through to the outside of the mounting slot, and the bottom end is movably snapped to the surface of the limiting plate. The inner sidewall of the mounting slot is movably fitted with a side connecting plate, and the upper surface of the side connecting plate is provided with a top layer end.

[0011] As a preferred technical solution of this application, a fastening screw is provided in the middle of the upper surface of the top layer, and a tapered end is provided at the bottom of one end of the fastening screw. A positioning hole is provided in the middle of one side surface of the base, and a locking rod is connected through the inner arc surface of the positioning hole.

[0012] As a preferred technical solution of this application, one end of the locking rod extends through to one side of the base and is connected to a locking button, and one side of the locking button is attached to the surface of the base.

[0013] As a preferred technical solution of this application, the outer arc surface of the locking rod is provided with a receiving end, a spring is abutting one side surface of the receiving end, one end of the locking rod is provided with a slanted tightening end, and the same locking rod is connected through one side surface of the side connecting plate. There are two locking rods, which are symmetrically distributed and connected to each other.

[0014] (III) Beneficial Effects

[0015] The limiting plate and base help maintain a stable thermal field around the arc extinguishing plate, making the arc extinguishing process more efficient and stable. This ensures the reliable operation of the electromagnetic AC contactor as a whole, reduces the probability of failure caused by arc extinguishing problems, and allows the entire structure to maintain a tight connection during operation. This effectively resists the loosening of components that may be caused by external forces such as vibration and impact, improves the stability and reliability of the electromagnetic AC contactor under complex working conditions, and ensures the position and coordinated operation of the moving contact mounting base and related components during operation, thus guaranteeing the overall high efficiency and long service life of the contactor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic AC contactor.

[0017] Figure 2 This is a schematic diagram showing the disassembly of the limit plate and the contactor housing in an electromagnetic AC contactor.

[0018] Figure 3 A schematic diagram of the overall structure of the base of an electromagnetic AC contactor;

[0019] Figure 4 This is a schematic cross-sectional view of the base and side connecting plate of an electromagnetic AC contactor.

[0020] Figure 5 This is a schematic diagram of the snap-fit ​​elastic element structure of an electromagnetic AC contactor.

[0021] In the picture:

[0022] 1. Contactor housing; 101. Normally open auxiliary contact; 102. Normally closed auxiliary contact; 103. Divider plate; 104. Slot; 2. Limiting plate; 201. Support leg; 202. Snap-fit ​​block; 203. Mounting slot; 3. Moving contact mounting base; 4. Base; 401. Hook-shaped snap-fit ​​end; 402. Positioning hole; 5. Snap-fit ​​elastic element; 501. Abutting inner arc end; 6. Side connecting plate; 601. Top end; 7. Fastening screw; 701. Conical end; 8. Locking rod; 801. Lock button; 802. Receiving end; 803. Spring; 804. Slanted tightening end. 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] This utility model provides an electromagnetic AC contactor, such as... Figures 1 to 5 As shown, the contactor includes a contactor housing 1. Normally open auxiliary contacts 101 are provided on the top of both sides of the contactor housing 1, and normally closed auxiliary contacts 102 are provided on the bottom of both sides of the contactor housing 1. A partition plate 103 is provided on both sides of the normally open auxiliary contacts 101, with a cavity between each pair of partition plates 103. A limiting plate 2 is movably engaged on the upper surface of the contactor housing 1. Support legs 201 are provided at both ends of the limiting plate 2, with one end of each support leg 201 movably engaged in the cavity on both sides of the partition plate 103. A locking block 202 is provided on both sides of the limiting plate 2 away from the support legs 201. A slot 104 is provided on both sides of the upper surface of the contactor housing 1, with the inner wall of the slot 104 movably connected to the locking block 202. An installation slot 203 is provided on the upper surface of the limiting plate 2. A moving contact mounting seat 3 is provided on the upper surface of the contactor housing 1, with a base 4 movably sleeved on one side of the moving contact mounting seat 3.

[0025] The limiting plate 2 can be movably snapped onto the top of the contactor housing 1. The limiting plate 2 has support feet 201 on both the front and rear sides. The size of the support feet 201 is adapted to the gap between the partition plates 103 on both sides of the normally closed auxiliary contact 102, so that they can be inserted tightly and smoothly. When the limiting plate 2 is installed, the operator only needs to align it and press it down gently. The support feet 201 can fall steadily into the designated position along the guide of the partition plates 103. At the same time, the snap-fit ​​blocks 202 on both sides will be inserted into the slots 104 on the top of the contactor housing 1. The slots 104 and the snap-fit ​​blocks 202 are matched in shape. During the process of inserting the snap-fit ​​blocks 202 into the slots 104, a certain elastic deformation will occur. After being fully inserted, they can return to their original shape by their own elasticity and be tightly snapped into the slots 104 to form a stable snap-fit ​​structure.

[0026] In this way, the limiting plate 2 tightly seals the top of the arc extinguishing plate. On the one hand, it effectively prevents the intrusion of external dust, moisture and other impurities, avoiding the arc extinguishing plate from being affected by impurities and greatly extending the service life of the arc extinguishing plate. On the other hand, during the operation of the contactor, the arc extinguishing plate will generate a high temperature. The sealing of the limiting plate 2 helps to maintain the stability of the thermal field around the arc extinguishing plate, making the arc extinguishing process more efficient and stable, thereby ensuring the reliable operation of the electromagnetic AC contactor as a whole and reducing the probability of failure caused by arc extinguishing problems.

[0027] The base 4 has bent edges on both sides, and the inner sidewalls of the base 4 are provided with snap-fit ​​elastic elements 5 on both sides. One side of the snap-fit ​​elastic element 5 is provided with an inner arc end 501. The upper surface of the base 4 is provided with a hook-shaped snap-fit ​​end 401 in the middle. The upper surface of the hook-shaped snap-fit ​​end 401 extends through to the outside of the mounting slot 203 and is movably snapped to the surface of the limiting plate 2 at its bottom end. The inner sidewall of the mounting slot 203 is movably fitted with a side connecting plate 6. The upper surface of the side connecting plate 6 is provided with a top end 601. The upper surface of the top end 601 is provided with a fastening screw 7 in the middle. One end of the fastening screw 7 is provided with a tapered end 7 at its bottom. 01. A positioning hole 402 is provided in the middle of one side surface of the base 4. A locking rod 8 is connected through the inner arc surface of the positioning hole 402. One end of the locking rod 8 is connected to a locking button 801 through the base 4. One side of the locking button 801 is attached to the surface of the base 4. A receiving end 802 is provided on one side of the outer arc surface of the locking rod 8. A spring 803 is abutted on one side surface of the receiving end 802. A slanted tightening end 804 is provided on one end of the locking rod 8. The same locking rod 8 is connected through one side surface of the side connecting plate 6. There are two locking rods 8, which are symmetrically distributed and connected to each other.

[0028] A base 4 is installed on the periphery of the moving contact mounting base 3, and a hook-shaped snap-fit ​​end 401 is provided inside the base 4. During installation, it can be tightly snapped onto the surface of the limiting plate 2. The installer only needs to push the base 4 smoothly in a specific direction, and the hook-shaped snap-fit ​​end 401 will automatically snap onto the limiting plate 2 under the action of a slight external force, thus forming a stable whole with the limiting plate 2. This connection method not only ensures the tightness of the structure, but also makes the subsequent assembly process smoother.

[0029] Subsequently, the inner arc ends 501 on both sides of the snap-fit ​​elastic member 5 retract inward and abut against the surface of the moving contact mounting base 3. The snap-fit ​​elastic member 5 is made of a special material with high elasticity and wear resistance. During installation, the installer needs to use professional tools to apply appropriate external force to make it retract and deform inward, so that it can fit against the surface of the moving contact mounting base 3. When the external force is removed, the snap-fit ​​elastic member 5, with its own elastic restoring force, tightly abuts against the moving contact mounting base 3, providing additional fastening force for the entire structure and preventing loosening or displacement between components.

[0030] Two locking rods 8 are fixedly installed in the side connecting plate 6 on the other side. They are distributed and abutted together to ensure the stability and reliability of their performance. When further tightening of the structure is required, the fastening screws 7 on the top end 601 begin to function. As the fastening screws 7 are continuously screwed downwards, they will press the inclined tightening ends 804 downwards. When the inclined tightening ends 804 are subjected to the pressure of the fastening screws 7, they can effectively decompose and transmit the force. Under the continuous downward force of the fastening screws 7, the locking rods 8 on both sides will compress the springs 803 towards the side connecting plate 6 and the base. 4. The spring 803 has good elasticity and long fatigue life. During compression, the spring 803 stores a large amount of elastic potential energy, providing continuous and stable pressure to the locking rod 8. This ensures that the entire structure can always maintain a tight connection during operation, effectively resisting the loosening of components that may be caused by external forces such as vibration and impact. This improves the stability and reliability of the electromagnetic AC contactor under complex working conditions, ensures the position and coordinated operation of the moving contact mounting base 3 and related components during operation, and guarantees the overall high efficiency and long service life of the contactor.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic AC contactor, comprising a contactor housing (1), characterized in that: The contactor housing (1) has normally open auxiliary contacts (101) on the top of both sides of its surface, and normally closed auxiliary contacts (102) on the bottom of both sides of its surface. Each normally open auxiliary contact (101) has a partition plate (103) on both sides, with a cavity between each pair of partition plates (103). A limiting plate (2) is movably engaged with the upper surface of the contactor housing (1). Both ends of the limiting plate (2) have support legs (201), one end of which is movably engaged with... Inside the cavities on both sides of the partition plate (103), the limiting plate (2) is provided with snap-fit ​​blocks (202) on both sides away from the support foot (201). The upper surface of the contactor housing (1) is provided with slots (104) on both sides. The inner sidewall of the slot (104) is movably connected to the snap-fit ​​block (202). The upper surface of the limiting plate (2) is provided with an installation slot (203). The upper surface of the contactor housing (1) is provided with a moving contact mounting seat (3). A base (4) is movably sleeved on one side of the moving contact mounting seat (3).

2. The electromagnetic AC contactor according to claim 1, characterized in that: The base (4) has bent edges on both sides, and the inner sidewalls of the base (4) are provided with snap-fit ​​elastic elements (5) on both sides. One side of the snap-fit ​​elastic element (5) is provided with an inner arc end (501), and the upper surface of the base (4) is provided with a hook-shaped snap-fit ​​end (401).

3. An electromagnetic AC contactor according to claim 2, characterized in that: The upper surface of the hook-shaped snap-fit ​​end (401) extends through the outside of the mounting slot (203) and the bottom end is movably snapped onto the surface of the limiting plate (2). The inner side wall of the mounting slot (203) is movably fitted with a side connecting plate (6), and the upper surface of the side connecting plate (6) is provided with a top end (601).

4. An electromagnetic AC contactor according to claim 3, characterized in that: The top end (601) has a fastening screw (7) in the middle of its upper surface. One end of the fastening screw (7) has a tapered end (701) at its bottom. The base (4) has a positioning hole (402) in the middle of one side surface. The inner arc surface of the positioning hole (402) is connected to a locking rod (8).

5. An electromagnetic AC contactor according to claim 4, characterized in that: One end of the locking rod (8) extends through to one side of the base (4) and is connected to a locking button (801). One side of the locking button (801) is attached to the surface of the base (4).

6. An electromagnetic AC contactor according to claim 5, characterized in that: The locking rod (8) has a receiving end (802) on one side of its outer arc surface. A spring (803) abuts against one side surface of the receiving end (802). The locking rod (8) has a slanted tightening end (804) at one end. The same locking rod (8) is connected through one side surface of the side connecting plate (6). There are two locking rods (8), which are symmetrically distributed and connected to each other.

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