CN209912807U - Small-sized high-power electromagnetic relay - Google Patents
Small-sized high-power electromagnetic relay Download PDFInfo
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- CN209912807U CN209912807U CN201920965726.7U CN201920965726U CN209912807U CN 209912807 U CN209912807 U CN 209912807U CN 201920965726 U CN201920965726 U CN 201920965726U CN 209912807 U CN209912807 U CN 209912807U
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- radiating fin
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Abstract
The utility model discloses a small-sized high-power electromagnetic relay, which comprises a base, a shell, an electromagnetic component and a contact component, wherein the shell is covered on the base; the electromagnetic assembly comprises a yoke iron, a coil frame, a coil, an iron core and an armature iron; the contact assembly comprises a movable contact spring, a fixed contact and a copper woven belt, and is characterized in that a metal radiating fin is fixedly mounted on the movable contact spring in a fitting manner, the upper end of the movable contact spring sequentially penetrates through the movable contact spring and the metal radiating fin from bottom to top, the upper end of the movable contact spring extends out of the metal radiating fin, the metal radiating fin is in close contact with the movable contact spring, one end of the copper woven belt is welded on the metal radiating fin, and the other end of the copper woven belt is welded on a yoke. The movable contact spring has the advantages that the metal radiating fin is fixedly attached to the movable spring and is in close contact with the movable contact, and the metal radiating fin is used for bearing heat borne by the movable spring in the working process and quickly and effectively radiating the heat out, so that the movable spring is protected.
Description
Technical Field
The utility model relates to a relay especially relates to a small-size high-power electromagnetic relay.
Background
A relay is a widely used electronic component, and is applied to the fields of household appliances, automobiles, industrial control, power systems, communication devices, and the like. With the development of society, the use of the relay is more and more extensive, and the variety is also more and more, and function and structure are also different. In the existing small-sized high-power electromagnetic relay, a movable reed in the electromagnetic relay is usually a single thin beryllium copper sheet, a copper woven belt is directly welded on the movable reed, and when the relay bears a high load for a long time, the single thin beryllium copper sheet is easily melted, so that the product fails, and the overall service life of the product is greatly influenced.
Disclosure of Invention
The utility model aims to solve the technical problem that a small-size high-power electromagnetic relay of simple structure, longer life is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does:
a small-sized high-power electromagnetic relay comprises a base, a shell covered on the base, an electromagnetic assembly and a contact assembly, wherein the electromagnetic assembly and the contact assembly are arranged in the shell;
the electromagnetic assembly comprises a yoke iron arranged on the base, a coil frame arranged on the yoke iron, a coil arranged in the coil frame, an iron core arranged in the coil and an armature arranged on the yoke iron and corresponding to the upper end of the iron core;
the contact assembly comprises a movable spring piece, a movable contact, a static spring piece, a static contact and a copper braided belt, wherein the movable spring piece is arranged in linkage with the armature iron;
the movable contact is characterized in that a metal radiating fin is fixedly attached to the movable spring, the upper end of the movable contact sequentially penetrates through the movable spring and the metal radiating fin from bottom to top, the upper end of the movable contact extends out of the metal radiating fin, the metal radiating fin is in close contact with the movable contact, one end of the copper woven belt is welded on the metal radiating fin, and the other end of the copper woven belt is welded on the yoke.
The metal radiating fin is a red copper sheet. The red copper has better electrical conductivity and thermal conductivity, and ensures more efficient guidance quality and thermal conductivity.
The surface of the red copper sheet is plated with silver. The silver is plated on the surface of the copper sheet, so that the heat conductivity and the electric conductivity of the whole metal heat sink are better.
The thickness of the metal radiating fin is 0.7 mm-1 mm. The thickness effectively saves the cost on the basis of ensuring the heat dissipation performance.
The movable contact is riveted on the metal radiating fin. The installation is convenient and the close contact can be ensured.
The movable contact is divided into an installation part and a limiting part from top to bottom, a first installation hole which is communicated up and down and used for the installation part to pass through is arranged on the movable spring, a second installation hole which is communicated up and down and corresponds to the first installation hole in position is arranged on the metal heat radiating sheet, the limiting part is positioned on the lower end surface of the movable spring, and the installation part sequentially passes through the first installation hole and the second installation hole from bottom to top and is riveted on the metal heat radiating sheet.
Compared with the prior art, the utility model has the advantages of: the metal cooling fin is fixedly mounted on the movable spring in a fitting mode, is in close contact with the movable contact, is used for bearing heat borne by the movable spring in the working process and quickly and effectively distributes the heat out, so that the movable spring is protected, the movable spring is prevented from being melted under the condition of high load, the service life of the whole relay is effectively guaranteed, and the structure is simple.
Drawings
FIG. 1 is a schematic view of the present invention in a partial cross-sectional structure;
fig. 2 is a schematic view of the three-dimensional structure of the metal radiating fin, the movable spring, the armature, the movable contact and the copper braided strap of the present invention;
fig. 3 is a schematic view of the sectional structure of the metal heat sink, the movable spring, the armature, the movable contact and the copper braid;
fig. 4 is a schematic view of the sectional structure of the middle metal heat sink and the movable spring plate of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 4, a small-sized high-power electromagnetic relay includes a base 1, a housing (not shown) covering the base 1, an electromagnetic assembly and a contact assembly disposed in the housing;
the electromagnetic assembly comprises a yoke iron 2 arranged on the base 1, a coil frame 3 arranged on the yoke iron 2, a coil 4 arranged in the coil frame 3, an iron core 5 arranged in the coil 4 and an armature 6 arranged on the yoke iron 2 corresponding to the upper end of the iron core 5;
the contact assembly comprises a movable spring 7 which is linked with the armature 6, a movable contact 8 which is arranged on the movable spring 7, a fixed spring 9 which is arranged on the base 1 corresponding to the movable spring 7, a fixed contact 10 which is arranged on the fixed spring 9 corresponding to the movable contact 8 and a copper braided belt 11;
the movable spring 7 is fixedly attached with a metal radiating fin 12, the movable spring 7 and the metal radiating fin 12 sequentially penetrate through the upper end of the movable contact 8 from bottom to top, the upper end head of the movable contact 8 extends out of the metal radiating fin 12, the metal radiating fin 12 is tightly contacted with the movable contact 8, one end of the copper woven belt 11 is welded on the metal radiating fin 12, and the other end of the copper woven belt 11 is welded on the yoke 2.
In this embodiment, the metal heat sink 12 is a copper sheet. The red copper has better electrical conductivity and thermal conductivity, and ensures more efficient guidance quality and thermal conductivity.
In this embodiment, the surface of the copper sheet is silver plated. The silver is plated on the surface of the copper sheet, so that the heat conduction and the electric conduction of the whole metal heat sink 12 are better.
In this embodiment, the metal heat sink 12 has a thickness of 0.7mm to 1 mm. The thickness effectively saves the cost on the basis of ensuring the heat dissipation performance.
In this embodiment, the movable contact 8 is rivet-mounted on the metal heat sink 12. The installation is convenient and the close contact can be ensured.
In this embodiment, the movable contact 8 is divided into a mounting portion 81 and a limiting portion 82 from top to bottom, a first mounting hole 71 which is vertically through and through which the mounting portion 81 passes is formed in the movable spring 7, a second mounting hole 121 which is vertically through and corresponds to the first mounting hole 71 in position is formed in the metal heat sink 12, the limiting portion 82 is located on the lower end surface of the movable spring 7, and the mounting portion 81 sequentially passes through the first mounting hole 71 and the second mounting hole 121 from bottom to top and is riveted and mounted on the metal heat sink 12.
6 small high-power electromagnetic relays are taken to carry out service life test, wherein 3 small high-power electromagnetic relays with conventional structures without metal radiating fins are numbered as No. 1, No. 2 and No. 3, and the other 3 small high-power electromagnetic relays with improved structures are not provided with the metal radiating fins and the ends of the braided belts are directly welded on the metal radiating fins in a laminating way on the movable spring, and the numbers are 4#, 5# and 6 #; the test results are shown in the following table:
it can be seen from the data that the table embodied, small-size high-power electromagnetic relay's of structure life is superior to the life of small-size high-power electromagnetic relay of traditional conventional structure greatly.
Claims (6)
1. A small-sized high-power electromagnetic relay comprises a base, a shell covered on the base, an electromagnetic assembly and a contact assembly, wherein the electromagnetic assembly and the contact assembly are arranged in the shell;
the electromagnetic assembly comprises a yoke iron arranged on the base, a coil frame arranged on the yoke iron, a coil arranged in the coil frame, an iron core arranged in the coil and an armature arranged on the yoke iron and corresponding to the upper end of the iron core;
the contact assembly comprises a movable spring piece, a movable contact, a static spring piece, a static contact and a copper braided belt, wherein the movable spring piece is arranged in linkage with the armature iron;
the method is characterized in that: the movable contact is characterized in that a metal radiating fin is fixedly attached to the movable spring, the upper end of the movable contact sequentially penetrates through the movable spring and the metal radiating fin from bottom to top, the upper end of the movable contact extends out of the metal radiating fin, the metal radiating fin is in close contact with the movable contact, one end of the copper woven belt is welded on the metal radiating fin, and the other end of the copper woven belt is welded on the yoke.
2. A small-sized high-power electromagnetic relay as claimed in claim 1, characterized in that said metal heat sink is a copper sheet.
3. A small-sized high-power electromagnetic relay as claimed in claim 2, characterized in that the surface of the copper sheet is plated with silver.
4. A small-sized high-power electromagnetic relay as claimed in claim 1, wherein said metal heat sink has a thickness of 0.7mm to 1 mm.
5. A small-sized high-power electromagnetic relay as claimed in claim 1, wherein said movable contact is rivet-mounted on said metal heat sink.
6. A small-sized high-power electromagnetic relay as claimed in claim 1 or 5, characterized in that said moving contact is divided into a mounting portion and a limiting portion from top to bottom, said moving spring is provided with a first mounting hole penetrating up and down for said mounting portion to pass through, said metal heat sink is provided with a second mounting hole penetrating up and down and corresponding to said first mounting hole, said limiting portion is located on the lower end surface of said moving spring, said mounting portion sequentially penetrates said first mounting hole and said second mounting hole from bottom to top and is riveted on said metal heat sink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920965726.7U CN209912807U (en) | 2019-06-25 | 2019-06-25 | Small-sized high-power electromagnetic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920965726.7U CN209912807U (en) | 2019-06-25 | 2019-06-25 | Small-sized high-power electromagnetic relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209912807U true CN209912807U (en) | 2020-01-07 |
Family
ID=69050331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920965726.7U Active CN209912807U (en) | 2019-06-25 | 2019-06-25 | Small-sized high-power electromagnetic relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209912807U (en) |
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2019
- 2019-06-25 CN CN201920965726.7U patent/CN209912807U/en active Active
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