Electromagnetic relay moving contact mechanism

Abstract

The utility model discloses a moving contact mechanism of an electromagnetic relay, which belongs to the technical field of electromagnetic relays and comprises a bottom frame, a U-shaped frame is arranged at the top of the bottom frame, an insulating protective shell is movably inserted into the top of the bottom frame, two groups of contact plates are fixedly mounted on one side of the U-shaped frame, and static contacts are fixedly mounted on one sides of the two groups of contact plates. A second limiting rod is fixedly installed in the U-shaped frame, moving plates are slidably installed on the outer side of the second limiting rod, inserting plates are fixedly installed on one sides of the two sets of moving plates, the two sets of inserting plates are movably inserted into the bottom of the insulation protection shell, moving contacts are fixedly installed on the two sides of the moving plates, and a worm is rotatably installed in the bottom frame; the two groups of supports are fixedly installed in the bottom frame, an operator can be continuously and effectively prevented from accidentally contacting an electrified part, the electric shock risk of the operator is reduced, when the relay needs to be maintained or overhauled, the insulating protective shell can be rapidly disassembled and refixed, the operation time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic relays, in particular to a moving contact mechanism of an electromagnetic relay. Background Art

[0002] Electromagnetic relays, as a common electronic control device, are widely used in fields such as automatic control, power systems, and communications equipment. The moving contact mechanism is a key component of electromagnetic relays, and its performance directly affects the relay's operational reliability and service life. However, existing electromagnetic relay moving contact mechanisms have several shortcomings in practical applications. For example, the contact stability between the moving and stationary contacts is less than ideal, prone to poor contact. During operation, high frictional resistance affects the sensitivity and accuracy of the movement. Furthermore, the moving contact mechanism is complex in structure, making assembly and maintenance difficult.

[0003] In the prior art, when using the electromagnetic relay moving contact mechanism, if there is no insulating protective cover, the operator is more likely to directly contact the live moving contact part during operation or maintenance, which greatly increases the risk of electric shock. When the moving contact or related components fail and need to be replaced, the lack of the convenient disassembly function of the protective cover will make the operation process cumbersome and prolong the maintenance time. Therefore, we propose an electromagnetic relay moving contact mechanism to solve this problem. Utility Model Content

[0004] The purpose of the present utility model is to provide a moving contact mechanism of an electromagnetic relay to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The top of the U-shaped frame is fixedly provided with a U-shaped frame, and the top of the bottom frame is movably plugged into an insulating protective shell, and two groups of touch plates are fixedly installed on one side of the U-shaped frame, and static contacts are fixedly installed on one side of the two groups of touch plates. A limit rod 2 is fixedly installed inside the U-shaped frame, and a movable plate is slidably installed on the outer side of the limit rod 2, and one side of the two groups of movable plates is fixedly installed with an inserting plate, and the two groups of inserting plates are movably plugged into the bottom of the insulating protective shell, and moving contacts are fixedly installed on both sides of the movable plate, and a worm is rotatably installed inside the bottom frame, and two groups of brackets are fixedly installed inside the bottom frame, and two groups of bidirectional screw rods are rotatably installed inside the two groups of brackets, and the outer side of the bidirectional screw rod is threadedly connected to two groups of moving blocks, one side of one group of the brackets is rotatably installed with a worm gear, and one end of the worm is fixedly installed with a turntable.

[0007] Preferably, an iron core is fixedly installed inside the U-shaped frame, a coil is wound around the outside of the iron core, a top plate is fixedly installed on the top of the U-shaped frame, the top plate is fixedly installed on the top of the limiting rod 2, a return spring is fixedly installed on the bottom of the top plate, the bottom of the return spring is fixedly installed on the top of the movable plate, and the bottom of the movable plate is fixedly installed with an armature.

[0008] Preferably, a limiting rod 1 is fixedly installed between the two groups of brackets, and the two groups of moving blocks are slidably installed on the outside of the limiting rod 1.

[0009] Preferably, a plurality of groups of jacks are provided on the top of the bottom frame, and the bottom of the insulating protective shell is movably plugged into the corresponding jacks.

[0010] Preferably, a slide groove is provided inside the movable plate, the second limiting rod is slidably installed in the slide groove, a vertical groove is opened on one side of the insulating protective shell, and the two groups of touch plates are adapted to the vertical groove.

[0011] Preferably, the turntable is rotatably mounted on one side of the bottom frame, the worm wheel is meshed with the worm, and the top plate and the U-shaped frame are arranged inside the insulating protective shell.

[0012] In the present invention, the electromagnetic relay moving contact mechanism is provided with an iron core, a coil, a second limit rod, a spring, a movable plate, a U-shaped plate, an armature, a static contact, a movable contact and a top plate. When the coil is energized, an electromagnetic force is generated, thereby attracting the armature, thereby driving the movable plate to move on the second limit rod, and then driving the movable contact to fit with the static contact. The electromagnetic force is generated at the moment the coil is energized, so that the movable contact can quickly fit with the static contact, realizing rapid connection of the circuit and reducing delays in signal transmission and control. This driving method based on the electromagnetic principle has a relatively compact structure and can achieve reliable contact action in a limited space, which is conducive to the miniaturization and integrated design of the relay.

[0013] The utility model has a reasonable structural design. The turntable is provided to drive the worm to rotate, thereby driving the worm wheel and the bidirectional lead screw to rotate, and then driving the moving block to move relatively under the restriction of the limit rod, and then driving the plug plate to fix the insulating protective shell, thereby ensuring that the insulating protective shell is firmly fixed, and can continuously and effectively prevent the operator from accidentally touching the live part, reducing the risk of electric shock. When the relay needs to be maintained or repaired, the insulating protective shell can be quickly removed and re-fixed, saving operation time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional structural diagram of a moving contact mechanism of an electromagnetic relay proposed in the present utility model;

[0015] Figure 2 This is a schematic cross-sectional view of a moving contact mechanism of an electromagnetic relay proposed in the present invention;

[0016] Figure 3 The present invention provides a partial cross-sectional structural diagram of a moving contact mechanism of an electromagnetic relay.

[0017] In the figure: 1. Bottom frame; 2. Insulation protective shell; 3. Turntable; 4. Worm; 5. Bracket; 6. Moving block; 7. Insert plate; 8. Worm gear; 9. Bidirectional lead screw; 10. Limit rod 1; 11. Limit rod 2; 12. U-shaped frame; 13. Moving plate; 14. Return spring; 15. Armature; 16. Iron core; 17. Coil; 18. Top plate; 19. Moving contact; 20. Static contact; 21. Contact plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-3 , a moving contact mechanism of an electromagnetic relay comprises: a bottom frame 1, a U-shaped frame 12 is provided on the top of the bottom frame 1, an insulating protective shell 2 is movably inserted into the top of the bottom frame 1, two sets of touch plates 21 are fixedly installed on one side of the U-shaped frame 12, and static contacts 20 are fixedly installed on one side of the two sets of touch plates 21, a limit rod 2 is fixedly installed inside the U-shaped frame 12, and a moving plate 13 is slidably installed on the outer side of the limit rod 21, one side of the two sets of moving plates 13 is fixedly installed with a plug-in plate 7, and the two sets of plug-in plates 7 are movably inserted into the bottom of the insulating protective shell 2, and moving contacts 19 are fixedly installed on both sides of the moving plate 13, a worm 4 is rotatably installed inside the bottom frame 1, two sets of brackets 5 are fixedly installed inside the bottom frame 1, and a bidirectional screw rod 9 is rotatably installed inside the two sets of brackets 5, and two sets of moving blocks 6 are threadedly connected to the outer side of the bidirectional screw rod 9, one side of one set of brackets 5 is rotatably installed with a worm gear 8, and one end of the worm 4 is fixedly installed with a turntable 3.

[0020] In this embodiment, an iron core 16 is fixedly installed inside the U-shaped frame 12, and a coil 17 is wound around the outside of the iron core 16. A top plate 18 is fixedly installed on the top of the U-shaped frame 12, and the top plate 18 is fixedly installed on the top of the limit rod 11. A reset spring 14 is fixedly installed on the bottom of the top plate 18, and the bottom of the reset spring 14 is fixedly installed on the top of the movable plate 13. The bottom of the movable plate 13 is fixedly installed with an armature 15. The action of the electromagnetic force is relatively stable and consistent, and the reliability of each attraction action is high, which reduces the situation of poor contact or failure to connect due to mechanical failure.

[0021] In this embodiment, a limit rod 10 is fixedly installed between the two groups of brackets 5, and two groups of moving blocks 6 are slidably installed on the outside of the limit rod 10. The moving stroke of the moving block 6 is clearly specified so that it can accurately reach the predetermined position and achieve reliable contact or separation with the static contact 20, avoiding incomplete contact or excessive contact.

[0022] In this embodiment, multiple groups of jacks are provided on the top of the bottom frame 1, and the bottom of the insulating protective shell 2 is movably plugged into the corresponding jacks. The design of the jacks and the plug-in board 7 enables the bottom frame 1 to be quickly aligned and connected during assembly, greatly shortening the installation time and improving production efficiency.

[0023] In this embodiment, a slide groove is provided inside the movable plate 13, and the limit rod 11 is slidably installed in the slide groove. A vertical groove is opened on one side of the insulating protective shell 2, and two groups of contact plates 21 are adapted to the vertical groove to ensure that the movable plate 13 moves within a preset range, so that the moving contact 19 can accurately contact or separate with the static contact 20, avoiding poor contact or excessive contact.

[0024] In this embodiment, the turntable 3 is rotatably mounted on one side of the bottom frame 1, the worm gear 8 is meshed with the worm 4, the top plate 18 and the U-shaped frame 12 are arranged inside the insulating protective shell 2, and the worm gear 8 and worm 4 transmission have high precision, which can realize small and precise movement control of the moving block 6 and the plug plate 7, thereby ensuring that the insulating protective shell 2 is accurately fixed in the desired position.

[0025] In this embodiment, when in use, the insulating protective shell 2 is sleeved on the outside of the U-shaped frame 12 and the top plate 18 through the vertical groove, the bottom of the insulating protective shell 2 is inserted into the socket of the bottom frame 1, and the turntable 3 is rotated to drive the worm 4 to rotate, thereby driving the worm wheel 8 to rotate, and then driving the bidirectional screw 9 to rotate, thereby driving the moving block 6 to move relative to each other under the restriction of the limit rod 10, thereby driving the plug-in plate 7 to move relative to each other, thereby fixing the insulating protective frame, ensuring that the insulating protective shell 2 is firmly fixed, and can continuously and effectively prevent the operator from accidentally touching the live part, reducing the risk of electric shock, and when the relay needs to be maintained or repaired, the insulating protective shell 2 can be quickly removed and re-fixed, saving operation time. , improve work efficiency, by energizing the coil 17, an electromagnetic force is generated inside the iron core 16, which in turn attracts the armature 15, so that the armature 15 drives the movable plate 13 to move through the limit rod 21, and the reset spring 14 is stretched. After the armature 15 is in contact with the iron core 16, the movable plate 13 drives the moving contact 19 to be in contact with the static contact 20. The electromagnetic force generated at the moment the coil 17 is energized attracts the armature 15, so that the moving contact 19 can be quickly in contact with the static contact 20, realizing the rapid connection of the circuit and reducing the delay in signal transmission and control. This driving method based on the electromagnetic principle has a relatively compact structure, can achieve reliable contact action in a limited space, and is conducive to the miniaturization and integrated design of the relay.

[0026] The above describes in detail the electromagnetic relay moving contact mechanism provided by the present invention. This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A moving contact mechanism of an electromagnetic relay, characterized in that: include: A bottom frame (1), a U-shaped frame (12) is provided on the top of the bottom frame (1), an insulating protective shell (2) is movably plugged into the top of the bottom frame (1), two groups of touch plates (21) are fixedly installed on one side of the U-shaped frame (12), and a static contact (20) is fixedly installed on one side of the two groups of touch plates (21), a limiting rod 2 (11) is fixedly installed inside the U-shaped frame (12), a movable plate (13) is slidably installed on the outer side of the limiting rod 2 (11), and a plug-in plate (7) is fixedly installed on one side of the two groups of movable plates (13), and the two groups of The plug plate (7) is movably plugged into the bottom of the insulating protective shell (2), and moving contacts (19) are fixedly installed on both sides of the movable plate (13). A worm (4) is rotatably installed inside the bottom frame (1), and two groups of brackets (5) are fixedly installed inside the bottom frame (1). Two groups of bidirectional screw rods (9) are rotatably installed inside the two groups of brackets (5). The outer sides of the bidirectional screw rods (9) are threadedly connected to two groups of moving blocks (6), one side of one group of the brackets (5) is rotatably installed with a worm wheel (8), and one end of the worm (4) is fixedly installed with a turntable (3).

2. The electromagnetic relay moving contact mechanism according to claim 1, characterized in that: An iron core (16) is fixedly installed inside the U-shaped frame (12), a coil (17) is wound around the outside of the iron core (16), a top plate (18) is fixedly installed on the top of the U-shaped frame (12), the top plate (18) is fixedly installed on the top of the second limiting rod (11), a return spring (14) is fixedly installed on the bottom of the top plate (18), the bottom of the return spring (14) is fixedly installed on the top of the moving plate (13), and the bottom of the moving plate (13) is fixedly installed with an armature (15).

3. The electromagnetic relay moving contact mechanism according to claim 1, characterized in that: A limiting rod (10) is fixedly installed between the two groups of brackets (5), and the two groups of moving blocks (6) are slidably installed on the outside of the limiting rod (10).

4. The electromagnetic relay moving contact mechanism according to claim 1, characterized in that: The top of the bottom frame (1) is provided with a plurality of groups of jacks, the bottom of the insulating protective shell (2) is movably plugged into the corresponding jacks, a vertical groove is provided on one side of the insulating protective shell (2), and the two groups of touch panels (21) are adapted to the vertical groove.

5. The electromagnetic relay moving contact mechanism according to claim 1, characterized in that: A sliding groove is provided inside the movable plate (13), and the second limiting rod (11) is slidably installed in the sliding groove.

6. The electromagnetic relay moving contact mechanism according to claim 2, characterized in that: The turntable (3) is rotatably mounted on one side of the bottom frame (1), the worm wheel (8) is meshed with the worm (4), and the top plate (18) and the U-shaped frame (12) are arranged inside the insulating protective shell (2).

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