Relay with efficient arc extinguishing effect

Abstract

A relay with an efficient arc extinguishing effect comprises a base, a coil assembly, a magnetic steel assembly, an electric connection assembly and an arc extinguishing assembly. The electric connection assembly comprises a static assembly and a movable assembly. The arc extinguishing assembly comprises an arc extinguishing frame and an arc extinguishing sheet. The arc extinguishing frame comprises a frame main body, a jack and a slot. The arc extinguishing sheet comprises an arc extinguishing sheet main body, a groove and a clamping block. The arc extinguishing assembly is arranged on one side of the motion trail of the movable contact. A plurality of arc extinguishing sheet main bodies are arranged along the motion trail of a movable contact, one side of each arc extinguishing sheet main body is provided with a groove, the opening of each groove inclines towards two sides to form a horn shape, a magnetic field generated by arc current is guided to blow plasma in the arc outwards, and the effects of arc segmentation and magnetic blow-out are achieved. Therefore, the movable contact can be always influenced by the arc extinguishing assembly in the moving process, and a good arc extinguishing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic latching relay, especially a relay with high -efficient arc extinguishing effect. BACKGROUND

[0002] The moving contact and the static contact of the relay will generate electric arc when opening and closing, and the electric arc is a kind of gas discharge phenomenon, and the instantaneous spark generated by current through some insulating medium (for example air). Electric arc will cause the loss of the contact of the relay, which leads to the great shortening of the service life of the relay and increases the use cost. The current commonly used way to reduce the generation of electric arc is to set a turning plate for arc extinguishing between the two contacts, and the turning plate is between the two contacts. But the above-mentioned scheme has a large opening distance between the two contacts, and the arc extinguishing effect can be achieved only when the contact moves to the specified position, especially the turning plate scheme, which will increase the loss of the contact.

[0003] A magnetic arc extinguishing electromagnetic relay is disclosed in Chinese patent CN 201020113849.7, which comprises an electromagnetic part, a contact part, a base and a cover. The base and the cover form a closed space to accommodate the electromagnetic part and the contact part. The contact part includes a moving spring, a moving contact, a moving lead-out sheet, a static contact sheet and a static contact. The center plane between the static contacts is orthogonal to the closed space to form an orthogonal plane, and a pair of magnetic steel is arranged on the orthogonal plane. This scheme installs a pair of magnetic steel between the moving and static contacts in the relay to achieve the effect of arc extinguishing. Although it is simple and effective, the magnetic steel is placed between the moving and static contacts. The particles in the broken electric arc will be blown to one of the magnetic steels under the action of the magnetic field. The high temperature of the electric arc will cause the temperature of the magnetic steel to rise, thereby reducing the magnetic performance of the magnetic steel and affecting the arc extinguishing effect. Moreover, the magnetic steel is close to the moving contact, which will generate a certain suction force to attract the moving contact to move towards the static contact. The moving contact may also be magnetized due to its close distance to the magnetic steel, which will further affect the on-off efficiency of the contact. Moreover, the motion trajectory of the contact is mostly arc-shaped, and the magnetic steel cannot always maintain the best arc extinguishing effect. SUMMARY

[0004] Therefore, the utility model provides a relay with high -efficient arc extinguishing effect to solve the above technical problems.

[0005] The utility model relates to a relay with high arc extinguishing effect, which comprises a base, a coil assembly arranged in the base, a magnetic steel assembly arranged on one side of the coil assembly, an electric connection assembly arranged on one side of the magnetic steel assembly, and an arc extinguishing assembly arranged in the base on the side of the electric connection assembly away from the magnetic steel assembly. The electric connection assembly comprises a static assembly embedded in the base and a movable dynamic assembly arranged in the base. The arc extinguishing assembly comprises an arc extinguishing frame embedded in the arc extinguishing groove and a plurality of arc extinguishing sheets inserted into the arc extinguishing frame. The arc extinguishing frame comprises a frame body, a plurality of insertion holes arranged on the end faces of the frame body, and a plurality of insertion slots arranged on the bottom surface of the frame body. The arc extinguishing sheet comprises an arc extinguishing sheet body, a groove arranged in the middle region of the arc extinguishing sheet body, and two sets of symmetrically arranged clamping blocks on both sides of the arc extinguishing sheet body. A plurality of arc extinguishing sheet bodies are arranged along the movement trajectory of the dynamic contact.

[0006] Further, the base comprises a base body and a plurality of arc extinguishing grooves arranged in the base body.

[0007] Further, the coil assembly comprises a coil skeleton embedded in the base body and an electromagnetic coil wound around the coil skeleton.

[0008] Further, the magnetic steel assembly comprises a permanent magnet rotatably arranged on the side of the coil assembly facing the electric connection assembly and a swing arm arranged on the side of the permanent magnet close to the electric connection assembly.

[0009] Further, the electric connection assembly comprises a static assembly embedded in the base and a movable dynamic assembly arranged in the base.

[0010] Further, the static assembly comprises a static spring sheet and two static contacts arranged on the end of the static spring sheet close to the dynamic assembly.

[0011] Further, one end of the static spring sheet extends to the outside of the base.

[0012] Further, the dynamic assembly comprises a dynamic spring sheet rotatably arranged in the base and two dynamic contacts arranged on the end of the dynamic spring sheet close to the static spring sheet.

[0013] Further, the opening of the groove is inclined to both sides in a trumpet shape.

[0014] Further, the arc extinguishing frame and the arc extinguishing sheet are located on the other side of the axis of the movement direction of the dynamic contact.

[0015] Compared with existing technologies, this utility model provides a relay with highly efficient arc-extinguishing effect by setting the arc-extinguishing component on one side of the movement trajectory of the moving contact. Multiple arc-extinguishing disc bodies are arranged along the movement trajectory of the moving contact, and a groove is formed on one side of each arc-extinguishing disc body. The opening of the groove is inclined to both sides in a funnel shape, guiding the magnetic field generated by the arc current to blow the plasma in the arc outward, thus achieving arc segmentation and magnetic blowing. This ensures that the moving contact is always affected by the arc-extinguishing component during movement, resulting in a better arc-extinguishing effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a relay with a high-efficiency arc extinguishing effect provided by this utility model.

[0017] Figure 2 for Figure 1 A schematic diagram of the base structure of a relay with efficient arc extinguishing effect.

[0018] Figure 3 for Figure 1 A schematic diagram of the arc-extinguishing structure of a relay with high-efficiency arc-extinguishing effect. Detailed Implementation

[0019] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0020] like Figures 1 to 3 The diagram shows a structural schematic of a relay with high-efficiency arc-extinguishing effect provided by this utility model. The relay with high-efficiency arc-extinguishing effect includes a base 10, a coil assembly 20 disposed in the base 10, a magnet assembly 30 disposed on one side of the coil assembly 20, an electrical connection assembly 40 disposed on one side of the magnet assembly 30, and an arc-extinguishing assembly 50 disposed in the base 10 on the side of the electrical connection assembly 40 away from the magnet assembly 30. It is conceivable that the relay with high-efficiency arc-extinguishing effect also includes other functional structures, such as a top cover, connection terminals, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0021] The base 10 includes a base body 11 and a plurality of arc-extinguishing grooves 12 disposed in the base body 11.

[0022] The coil assembly 20 is embedded in the base body 11. The coil assembly 20 comprises a coil skeleton 21 embedded in the base body 11 and an electromagnetic coil 22 wound on the coil skeleton 21. The electromagnetic coil 22 is wound on the coil skeleton 21 to form the coil assembly 20. The electromagnetic coil 22 is connected with an external power supply device, and after being energized, the electromagnetic coil 22 generates positive and negative poles at both ends, thereby interacting with the magnetic steel assembly 30.

[0023] The magnetic steel assembly 30 comprises a permanent magnet 31 rotatably arranged on the side of the coil assembly 20 facing the electric connection assembly 40, and a swing arm 32 arranged on the side of the permanent magnet 31 close to the electric connection assembly 40. The permanent magnet 31 has positive and negative poles at both ends, which interact with the positive and negative poles of the electromagnetic coil 22. The operator can change the direction of the current of the electromagnetic coil 22 to change the positive and negative poles of the electromagnetic coil 22, so that the permanent magnet 31 rotates in different directions. The swing arm 32 is used to connect with the electric connection assembly 40, which will be described below in combination with the electric connection assembly 40.

[0024] The electric connection assembly 40 comprises a static assembly 41 embedded in the base 10 and a movable assembly 42 movably arranged in the base 10.

[0025] The static assembly 41 comprises a static spring sheet 411 and two static contacts 412 arranged on the end of the static spring sheet 411 close to the movable assembly 42. One end of the static spring sheet 411 extends to the outside of the base 10 and is connected with the device to be energized. The static contacts 412 cooperate with the movable assembly 42 to connect the circuit.

[0026] The movable assembly 42 comprises a movable spring sheet 421 rotatably arranged in the base 10 and two movable contacts 422 arranged on the end of the movable spring sheet 421 close to the static spring sheet 411. The other end of the movable spring sheet 421 is connected with the swing arm 32, so that the permanent magnet 31 can drive the movable spring sheet 421 to rotate when rotating, thereby controlling the contact and disconnection of the movable contacts 422 and the static contacts 412. It is conceivable that the movement trajectory of the movable contacts 422 is an arc, and when the movable contacts 422 contact the static contacts 412, the contact surfaces of the movable contacts 422 and the static contacts 412 coincide.

[0027] The arc extinguishing assembly 50 comprises an arc extinguishing frame 51 embedded in the arc extinguishing groove 12 and a plurality of arc extinguishing sheets 52 inserted in the arc extinguishing frame 51. Please refer to Figure 1 , the arc extinguishing frame 51 and the arc extinguishing sheets 52 are located on the other side of the axis of the movement direction of the movable contacts 422.

[0028] The outer contour of the arc extinguishing frame 51 is in the shape of "U". The arc extinguishing frame 51 comprises a frame body 511, a plurality of pairs of insertion holes 512 arranged on the end faces of the frame body 511, and a plurality of insertion slots 513 arranged on the bottom face of the frame body 511. The arc extinguishing sheet 52 comprises an arc extinguishing sheet body 521, a recess 522 arranged in the middle region of the arc extinguishing sheet body 521, and two groups of clamping blocks 523 symmetrically arranged on the two sides of the arc extinguishing sheet body 521.

[0029] The end face of the arc extinguishing sheet body 521 facing away from the recess 522 is inserted into the insertion slot 513, and the clamping blocks 523 on the two sides are inserted into the insertion holes 512, so that the arc extinguishing sheet body 521 is fixed into the arc extinguishing frame 51. The opening of the recess 522 is inclined to the two sides in the shape of a horn, so as to guide the magnetic field generated by the arc current to blow the plasma in the arc outward, so as to achieve the effects of arc splitting and magnetic blowing, thereby achieving the purpose of arc extinguishing.

[0030] A plurality of arc extinguishing sheet bodies 521 are arranged along the movement trajectory of the moving contact 422, that is, the side of the arc extinguishing sheet body 521 provided with the recess 522 faces the moving contact 422, so as to achieve the effect of arc extinguishing.

[0031] Compared with the prior art, the relay with high-efficiency arc extinguishing effect provided by the utility model is arranged with the arc extinguishing assembly 50 on one side of the movement trajectory of the moving contact 422. A plurality of arc extinguishing sheet bodies 511 are arranged along the movement trajectory of the moving contact 422, and the recess 522 is arranged on one side of the arc extinguishing sheet body 511. The opening of the recess 522 is inclined to the two sides in the shape of a horn, so as to guide the magnetic field generated by the arc current to blow the plasma in the arc outward, so as to achieve the effects of arc splitting and magnetic blowing. The moving contact 422 can always be affected by the arc extinguishing assembly 50 during the movement, and has good arc extinguishing effect.

[0032] The above is only the preferred embodiment of the utility model, and is not used for limiting the protection scope of the utility model. Any modification, equivalent replacement or improvement within the spirit of the utility model is covered in the claim scope of the utility model.

Claims

1. A relay having a high efficiency arc extinguishing effect, characterized by: The relay with high arc extinguishing effect comprises a base, a coil assembly arranged in the base, a magnetic steel assembly arranged on one side of the coil assembly, an electric connection assembly arranged on one side of the magnetic steel assembly, and an arc extinguishing assembly arranged in the base on the side of the electric connection assembly away from the magnetic steel assembly, the base comprises a base body and a plurality of arc extinguishing grooves arranged in the base body, the electric connection assembly comprises a static assembly embedded in the base and a dynamic assembly movably arranged in the base, the dynamic assembly comprises a dynamic spring sheet rotatably arranged in the base and two dynamic contact points arranged on the end of the dynamic spring sheet close to the static spring sheet, the arc extinguishing assembly comprises an arc extinguishing frame embedded in the arc extinguishing grooves and a plurality of arc extinguishing sheets inserted in the arc extinguishing frame, the arc extinguishing frame comprises a frame body, a plurality of pairs of insertion holes arranged on the end faces of the frame body, and a plurality of insertion slots arranged on the bottom surface of the frame body, the arc extinguishing sheet comprises an arc extinguishing sheet body, a recess arranged in the middle region of the arc extinguishing sheet body, and two groups of symmetrically arranged clamping blocks arranged on the two sides of the arc extinguishing sheet body, and a plurality of arc extinguishing sheet bodies are arranged along the movement track of the dynamic contact points.

2. The relay with high arc extinguishing effect according to claim 1, characterized in that: The coil assembly comprises a coil skeleton embedded in the base body and an electromagnetic coil wound on the coil skeleton.

3. The relay with high arc extinguishing effect according to claim 1, characterized in that: The magnetic steel assembly comprises a permanent magnet rotatably arranged on the side of the coil assembly facing the electric connection assembly and a swing arm arranged on the side of the permanent magnet close to the electric connection assembly.

4. The relay with high arc extinguishing effect according to claim 1, characterized in that: The static assembly comprises a static spring sheet and two static contact points arranged on the end of the static spring sheet close to the dynamic assembly.

5. The relay with high arc extinguishing effect according to claim 4, characterized in that: One end of the static spring sheet extends to the outside of the base.

6. The relay with high arc extinguishing effect according to claim 1, characterized in that: The opening of the recess is inclined to both sides in a trumpet shape.

7. The relay with high arc extinguishing effect according to claim 1, characterized in that: The arc extinguishing frame and the arc extinguishing sheet are located on the other side of the axis of the movement direction of the dynamic contact points.

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