Magnetic latching relay with heat dissipation structure

Abstract

The utility model discloses a magnetic latching relay with a heat dissipation structure, which comprises a relay base and a relay upper cover in buckling connection, and an electromagnet assembly, a moving armature assembly, a static contact assembly and a moving contact assembly are arranged in the relay base; a shifting piece is arranged in the relay base between the moving armature assembly and the moving contact assembly, the shifting piece is pivoted in the relay base, one end of the shifting piece is connected with a driving arm of the moving armature assembly, and the other end of the shifting piece is connected with an elastic piece of the moving contact assembly. The periphery of a cavity formed after the contact between a moving contact of the moving contact assembly and a static contact of the static contact assembly is disconnected is provided with a heat dissipation body. Through heat dissipation bodies such as the ceramic chip, generated heat can be effectively transmitted, a large amount of heat generated when the movable contact and the static contact are disconnected is prevented from being gathered at the contact position, and the situation that the movable contact and the static contact are adhered together due to the fact that the movable contact and the static contact are kept in a high-temperature state for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a magnetic latching relay with a heat dissipation structure. Background Art

[0002] The existing magnetic latching relay used in electric energy meters is generally composed of an electromagnet assembly, a movable armature assembly, a stationary contact assembly, a moving contact assembly, a lever, a relay base and a relay cover. The stationary contact assembly includes an electrostatic sheet and a stationary contact arranged on the electrostatic sheet. The moving contact assembly includes a conductive sheet and a shunt sheet assembly, a moving contact and a spring. When the electromagnetic coil of the electromagnet assembly is excited, the magnetic pole changes, attracting / repelling the movable armature assembly, causing the movable armature assembly to move, and the reciprocating motion of the lever drives the movable contact assembly to move, thereby realizing the opening / closing of the movable / stationary contacts.

[0003] In the case of overload, the moving contact assembly and the stationary contact assembly will generate a reverse force, so that the moving contact and the stationary contact are separated and the power is cut off; in order to reduce the contact resistance and temperature rise during contact, silver plating is used, and in the case of overload, the high temperature generated by the overload causes the silver contact between the moving contact assembly and the stationary contact assembly to melt, and after cooling, the moving contact assembly and the stationary contact assembly are fused together;

[0004] Moreover, since the magnetic latching relay has a compact structure and cannot be fanned, the long-term high temperature state exacerbates the adhesion between the moving contact and the static contact. Utility Model Content

[0005] The purpose of the utility model is to solve the above technical problems and provide a magnetic latching relay with a heat dissipation structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a magnetic latching relay with a heat dissipation structure, comprising a relay base and a relay upper cover that is snap-fitted, wherein an electromagnet assembly, a moving armature assembly, a static contact assembly, and a moving contact assembly are arranged in the relay base; a toggle piece is arranged in the relay base between the moving armature assembly and the moving contact assembly, wherein the toggle piece is pivotally connected in the relay base, wherein one end of the toggle piece is connected to a driving arm of the moving armature assembly, and the other end of the toggle piece is connected to a spring piece of the moving contact assembly, and a heat sink is arranged around a cavity formed after the contact between the moving contact of the moving contact assembly and the static contact of the static contact assembly is disconnected.

[0007] A further preferred technical solution is that a first heat sink is provided near the side of the relay cover, and the first heat sink covers the spring portion of the moving contact assembly, the portion of the stationary contact assembly near the stationary contact point, and the portion of the lever near the spring.

[0008] A further preferred technical solution is that a second heat sink is provided on the side close to the relay base, the second heat sink is in the shape of a sheet, and the second heat sink covers the spring portion of the moving contact assembly, the portion of the stationary contact assembly close to the stationary contact point, and the portion of the lever close to the spring.

[0009] A further preferred technical solution is that a third heat sink is provided between the first heat sink and the second heat sink at a position close to the stationary contact assembly and the shift rod, one end of the third heat sink is close to the end of the stationary contact assembly, and the other end is close to the shift rod.

[0010] A further preferred technical solution is that a fourth heat sink is provided between the first heat sink and the second heat sink at a position close to the stationary contact assembly and the moving contact assembly, and the fourth heat sink is located on a side of the moving contact away from the shift rod.

[0011] A further preferred technical solution is that the first heat sink, the second heat sink, the third heat sink and the fourth heat sink are all in sheet shape.

[0012] A further preferred technical solution is that the first heat sink and the second heat sink are symmetrically arranged.

[0013] A further preferred technical solution is that a U-shaped heat sink is provided on the static plate of the static contact assembly.

[0014] A further preferred technical solution is that three U-shaped heat sinks are provided on the electrostatic sheet, two of which are sheathed together.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the generated heat can be effectively transferred through heat sinks such as ceramic sheets, preventing a large amount of heat from accumulating at the contact position when the moving contact and the static contact are disconnected, avoiding maintaining a high temperature state for a long time, causing the moving contact and the static contact to stick together. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the axonometric drawing of the utility model;

[0017] Figure 2 This is an axonometric view of the moving and static contact assembly of the utility model;

[0018] Figure 3 This is an axonometric view of the moving contact assembly of the utility model;

[0019] Figure 4 This is an axonometric diagram of the moving contact assembly and the stationary contact assembly of the utility model;

[0020] Figure 5 This is an axonometric diagram of the heat dissipation structure of the utility model;

[0021] Figure 6 This is an exploded axonometric diagram of the heat dissipation structure of the utility model;

[0022] In the figure: 10. electrical base; 20. moving contact assembly; 21. conductive sheet; 22. shunt sheet assembly; 23. spring; 24. moving contact; 30. heat dissipation structure; 31. first heat sink; 32. fourth heat sink; 33. third heat sink; 34. second heat sink; 40. moving armature assembly; 50. electromagnet assembly; 60. stationary contact assembly; 61. heat sink; 62. electrostatic sheet; 63. stationary contact; 70. toggle member. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely 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 of the embodiments.

[0024] Example

[0025] like Figure 1 As shown, the present application provides a magnetic latching relay, including a relay base 10 and a relay upper cover connected in a snap-fit ​​manner, wherein the relay base 10 is provided with an electromagnet assembly 50, a movable armature assembly 40, a stationary contact assembly 60, and a movable contact assembly 20; a toggle member 70 is provided in the relay base 10 between the movable armature assembly 40 and the movable contact assembly 20, and the toggle member 70 is pivotally connected in the relay base 10, one end of the toggle member 70 is engaged with the driving arm of the movable armature assembly 40, and the other end of the toggle member 70 is engaged with the spring 23 of the movable contact assembly 20, and a stationary contact assembly 60 is provided in the relay base 10 between the movable armature assembly 40 and the movable contact assembly 20, as shown in FIG. Figure 2 As shown, the static contact assembly 60 includes an electrostatic sheet 62 and a static contact point 63 disposed on the electrostatic sheet 62. Figure 3 As shown, the moving contact assembly 20 is composed of a conductive sheet 21, a shunt sheet assembly 22, a moving contact 24, and a spring 23. The shunt sheet assembly is composed of a first shunt sheet, a second shunt sheet, a third shunt sheet, and a fourth shunt sheet stacked in sequence to form a spring sheet stack. One end of the spring sheet stack is riveted together through the moving contact 24 and the spring sheet 23, and the other end of the spring sheet stack is fixedly riveted to the conductive sheet 21.

[0026] The connecting end of the toggle member 70 and the moving contact 24 has a U-shaped bayonet, and the spring piece 23 on the moving contact 24 is embedded in the bayonet, and the connecting end of the toggle member 70 and the driving arm has a through hole along the outer extension direction of the driving arm, and the driving arm is inserted into the through hole.

[0027] like Figure 5-6 As shown, a first heat sink 31 is provided at a contact position between the moving contact 24 of the moving contact assembly 20 and the static contact 63 of the static contact assembly 60, close to the upper cover of the relay. The first heat sink 31 is in the shape of a sheet. The first heat sink 31 can cover the reed portion of the moving contact assembly 20, the portion of the static contact assembly 60 close to the static contact 63, and the portion of the lever 70 close to the spring 23. A second heat sink 34 is provided on the side close to the relay base 10. The second heat sink 34 is in the shape of a sheet. The second heat sink 34 can cover the reed portion of the moving contact assembly 20, the portion of the static contact assembly 60 close to the static contact 63, and the portion of the lever 70 close to the spring 23. The first heat sink 31 and the second heat sink 34 are symmetrically arranged, and a third heat sink 33 is provided between the first heat sink 31 and the second heat sink 34, near the static contact assembly 60 and the shift rod 70. The third heat sink 33 is in the shape of a sheet, and one end of the third heat sink 33 is close to the end of the static contact assembly 60, and the other end is close to the shift rod 70; a fourth heat sink 32 is provided between the first heat sink 31 and the second heat sink 34, near the static contact assembly 60 and the moving contact assembly 20. The fourth heat sink 32 is in the shape of a sheet, and is located on the side of the moving contact 24 away from the shift rod 70.

[0028] The first heat sink 31 , the second heat sink 34 , the third heat sink 33 , and the fourth heat sink 32 form a heat dissipation structure 30 around a cavity formed after the moving contact 24 and the static contact 63 are disconnected from each other.

[0029] The first heat sink 31 , the second heat sink 34 , the third heat sink 33 , and the fourth heat sink 32 are ceramic sheets or other heat sinks, such as corundum and other heat dissipation materials.

[0030] like Figure 4 As shown, when the moving contact 24 and the stationary contact 63 are disconnected, gas discharge generates an arc, which will generate a large amount of heat. Moreover, due to the compact structure of the magnetic holding relay, it is impossible to fan the heat. The long-term high temperature state causes the moving contact 24 and the stationary contact 63 to stick together. The generated heat can be effectively transferred through heat sinks such as ceramic sheets.

[0031] Since the electrostatic sheet 62 of the static contact assembly 60 also generates a large amount of heat, a U-shaped heat sink 61 is provided on the electrostatic sheet 62 . The heat sink 61 is riveted or bonded to the electrostatic sheet 62 to enhance the heat dissipation effect. The static contact 63 is riveted to the electrostatic sheet 62 .

[0032] The electrostatic sheet 62 is provided with three U-shaped heat sinks 61 , wherein two U-shaped heat sinks 61 are sheathed together, and the heat generated by the electrostatic sheet 62 is effectively transferred out through the U-shaped heat sinks 61 .

[0033] When the electromagnetic coil of the electromagnet assembly 50 is energized, the magnetic pole changes, attracting / repelling the movable armature assembly 40, causing the movable armature assembly 40 to move. The driving arm of the movable armature assembly 40 drives the toggle member 70 to rotate around the pivot center, and the toggle member 70 drives the movable contact assembly 20 to move, thereby realizing the opening / closing of the movable / static contacts.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A magnetic latching relay with a heat dissipation structure, comprising a relay base and a relay upper cover connected by snapping, wherein an electromagnet assembly, a movable armature assembly, a static contact assembly, and a movable contact assembly are arranged in the relay base; a toggle member is arranged in the relay base between the movable armature assembly and the movable contact assembly, wherein the toggle member is pivotally connected in the relay base, wherein one end of the toggle member is connected to a driving arm of the movable armature assembly, and the other end of the toggle member is connected to a spring piece of the movable contact assembly, wherein: A heat sink is arranged around the cavity formed after the contact between the moving contact of the moving contact assembly and the static contact of the static contact assembly is disconnected.

2. A magnetic latching relay with a heat dissipation structure according to claim 1, characterized in that: A first heat sink is provided near one side of the relay cover, and the first heat sink covers the spring portion of the moving contact assembly, the portion of the stationary contact assembly near the stationary contact point, and the portion of the lever near the spring.

3. A magnetic latching relay with a heat dissipation structure according to claim 2, characterized in that: A second heat sink is provided on one side close to the relay base. The second heat sink is in sheet form and covers the spring portion of the moving contact assembly, the portion of the stationary contact assembly close to the stationary contact point, and the portion of the lever close to the spring.

4. The magnetic latching relay with a heat dissipation structure according to claim 3, characterized in that: A third heat sink is provided between the first heat sink and the second heat sink at a position close to the stationary contact assembly and the shifting rod. One end of the third heat sink is close to the end of the stationary contact assembly, and the other end is close to the shifting rod.

5. The magnetic latching relay with a heat dissipation structure according to claim 4, characterized in that: A fourth heat sink is provided between the first heat sink and the second heat sink at a position close to the stationary contact assembly and the moving contact assembly. The fourth heat sink is located on a side of the moving contact away from the shifting rod.

6. The magnetic latching relay with a heat dissipation structure according to claim 5, characterized in that: The first heat sink, the second heat sink, the third heat sink and the fourth heat sink are all in sheet shape.

7. The magnetic latching relay with a heat dissipation structure according to claim 3, characterized in that: The first heat sink and the second heat sink are symmetrically arranged.

8. The magnetic latching relay with a heat dissipation structure according to claim 1, characterized in that: A U-shaped heat sink is provided on the static plate of the static contact assembly.

9. The magnetic latching relay with a heat dissipation structure according to claim 8, characterized in that: The electrostatic sheet is provided with three U-shaped heat sinks, two of which are sheathed together.

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