Silver graphite electrical contact device

Abstract

The utility model relates to the technical field of conductive elements, and particularly discloses a silver graphite electrical contact device, which comprises a base; the contact body is of a cylindrical structure; the connecting assembly is located at the bottom of the contact body, and the connecting assembly is used for connecting the contact body with the base; the heat dissipation assembly comprises a heat dissipation sheet which is arranged on the side surface of the contact body in a surrounding manner; and one end of the heat conduction pad is connected with the bottom surface of the contact body, and the other end of the heat conduction pad is connected with the connecting assembly. According to the silver graphite electrical contact device, through reasonable structural design, stable connection between the contact body and the base is realized, heat generated by the contact body in the working process is effectively reduced, the service life of the electrical contact device is prolonged, and the stability of the electrical contact device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive elements, in particular to a silver-graphite electric contact device. Background Art

[0002] Electrical contact devices, as an important electrical component, play a vital role in electronic equipment. They are mainly used to establish, maintain or interrupt circuits to ensure that current can flow along a predetermined path. The performance of electrical contact devices directly affects the stability and reliability of the entire electrical system.

[0003] The design of electrical contact devices needs to take into account many factors, including current capacity, contact resistance, wear resistance, corrosion resistance and mechanical strength. Among them, the current capacity determines the maximum current value that the contact can withstand, while the contact resistance affects the current transmission efficiency. Wear resistance and corrosion resistance determine the service life of the contact, while mechanical strength ensures that the contact can still work stably in harsh environments.

[0004] In order to meet these requirements, electrical contact devices are usually made of highly conductive, wear-resistant and corrosion-resistant materials. At the same time, by optimizing the structural design, the contact resistance is reduced and the current transmission efficiency is improved. In addition, the electrical contact device also needs to have good heat dissipation performance to prevent the heat generated by excessive current from damaging the contact.

[0005] However, although the existing electrical contacts have many advantages, there is still a problem that the electrical contacts generate too much heat during operation and cannot effectively dissipate the heat.

[0006] Therefore, how to solve the problem in the prior art that the electrical contacts generate too much heat during operation and cannot dissipate the heat effectively has become a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0007] In view of this, the utility model aims at the deficiencies of the prior art and proposes a silver-graphite electric contact device, aiming to solve the problem in the prior art that the electric contact generates excessive heat during operation and cannot effectively dissipate the heat.

[0008] The technical solution of the utility model is:

[0009] The utility model provides a silver-graphite electric contact device, comprising:

[0010] Pedestal;

[0011] The contact body is a cylindrical structure;

[0012] A connecting assembly, located at the bottom of the contact body, and used to connect the contact body to the base;

[0013] A heat dissipation component, the heat dissipation component comprising:

[0014] A heat sink, arranged around the side of the contact body;

[0015] A thermally conductive pad, one end of which is connected to the bottom surface of the contact body, and the other end of which is connected to the connecting component.

[0016] Furthermore, the base comprises:

[0017] A connecting groove, located at the top of the base;

[0018] There are a plurality of connecting holes, and the connecting holes are evenly distributed along the circumference of the connecting groove;

[0019] An insulating layer covering the outer surface of the base;

[0020] The heat dissipation hole is located at the bottom of the base and passes through the insulation layer.

[0021] Furthermore, the contact body comprises:

[0022] A graphite matrix is ​​located inside the contact body;

[0023] The silver wrapping layer is located on the outer surface of the graphite substrate.

[0024] Furthermore, the connection component comprises:

[0025] A connecting column, located at the bottom of the thermal pad;

[0026] A positioning column, located at the bottom of the connecting column;

[0027] There are a plurality of connecting rods, wherein the connecting rods are evenly arranged along the edge of the connecting column and are located at the bottom of the connecting column.

[0028] Furthermore, the outer diameter of the positioning column is the same as the inner diameter of the connecting groove, and the length of the positioning column is the same as the depth of the connecting groove.

[0029] Furthermore, the outer diameter of the connecting rod is the same as the inner diameter of the connecting hole, and the length of the connecting rod is the same as the depth of the connecting hole.

[0030] Furthermore, the thermally conductive pad is a thermally conductive graphite sheet.

[0031] Furthermore, the heat sink is an aluminum heat sink.

[0032] Furthermore, the silver-graphite electric contact device further comprises:

[0033] The contact protection cover covers the top of the contact body, and the contact protection cover is used to protect the contact body from interference from the external environment.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The silver-graphite electric contact device provided by the utility model realizes a stable connection between the contact body and the base through a reasonable structural design, effectively reduces the heat generated by the contact body during operation, and improves the service life and stability of the electric contact device. The silver-graphite electric contact device provided by the utility model realizes the overall fixation and stability of the electric contact device through the optimized design of the connection component and the heat dissipation component, while improving the heat dissipation effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of the silver-graphite electric contact device of the utility model;

[0037] Figure 2 The utility model is a schematic diagram of the contact body structure of the silver-graphite electric contact device.

[0038] In the figure: 100, base; 110, connecting groove; 120, connecting hole; 200, contact body; 210, graphite matrix; 220, silver wrapping layer; 310, connecting column; 320, positioning column; 330, connecting rod; 410, thermal pad. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] See also Figure 1-2 As shown, this embodiment provides a silver-graphite electric contact device, comprising:

[0044] Base 100.

[0045] The contact body 200 is a cylindrical structure.

[0046] The connecting assembly is located at the bottom of the contact body 200 , and is used to connect the contact body 200 with the base 100 .

[0047] Heat dissipation assembly, the heat dissipation assembly includes:

[0048] The heat sink is disposed around the side surface of the contact body 200 .

[0049] The thermal pad 410 has one end connected to the bottom surface of the contact body 200 and the other end connected to the connection assembly.

[0050] It can be seen that the connection assembly connects the contact body 200 and the base 100 to achieve overall fixation and stability of the electrical contact device; the heat dissipation assembly effectively reduces the heat generated by the contact body 200 during operation, thereby improving the service life and stability of the electrical contact device.

[0051] It can be understood that the heat sink is arranged around the side of the contact body 200, which can effectively conduct the heat dissipated from the surface of the contact body 200, increase the heat dissipation area, and thus improve the heat dissipation effect; and the thermal pad 410 can quickly conduct the heat from the bottom surface of the contact body 200 to the connecting component, and then transfer the heat to the base 100 through the connecting component, and finally dissipate the heat; the heat dissipation component can effectively reduce the temperature of the contact body 200, prevent performance degradation or damage caused by high temperature, and ensure the normal operation of the electrical contact device.

[0052] It can be understood that the silver-graphite electrical contact device provided in this embodiment has the advantages of simple structure, good heat dissipation effect, long service life, etc., and can be applied to a variety of electrical connection occasions.

[0053] Specifically, the base 100 includes:

[0054] The connecting groove 110 is located on the top of the base 100 .

[0055] There are a plurality of connection holes 120 , and the plurality of connection holes 120 are evenly distributed along the circumference of the connection groove 110 .

[0056] The insulating layer covers the outer surface of the base 100 .

[0057] The heat dissipation hole is located at the bottom of the base 100 and passes through the insulation layer.

[0058] It can be seen that the connecting groove 110 is located at the top of the base 100, and can cooperate with the connecting component at the bottom of the contact body 200 to achieve the overall fixation and stability of the electrical contact device; the insulating layer covers the outer surface of the base 100, which can effectively prevent the occurrence of electrical short circuits and electric shock accidents, and ensure the safety and stability of the electrical contact device; the heat dissipation hole is located at the bottom of the base 100, which can quickly dissipate the heat inside the base 100, further improving the heat dissipation effect and service life of the electrical contact device.

[0059] Specifically, the contact body 200 includes:

[0060] The graphite substrate 210 is located inside the contact body 200;

[0061] The silver coating layer 220 is located on the outer surface of the graphite substrate 210 .

[0062] It can be understood that the preparation method of the contact body 200 is as follows: first, using flake graphite powder, asphalt rubber powder, and carbon black as raw materials and coal tar as a binder, the flake graphite powder, asphalt rubber powder, carbon black, and coal tar are evenly kneaded, and the weight ratio is flake graphite powder: asphalt rubber powder: carbon black = 50-60:35-45:3-10, and the coal tar accounts for 30%-40% of the total weight of the raw materials and the binder, and then pressed into shape; then calcined at 850°C-950°C, and finally graphitized at 2850°C±50 to prepare the graphite matrix 210. The graphite matrix 210 is placed in a graphite mold, and a corresponding positioning mechanism is used to cast it in a medium frequency induction furnace, so that the metal silver is evenly coated around the graphite matrix 210 to form a silver coating layer 220, and the entire graphite matrix 210 is coated with the silver coating layer 220 to form a silver-coated graphite ingot. The prepared silver-coated graphite ingot is placed in a hot isostatic press, impregnated with silver at a set temperature and pressure, and then kept warm and pressurized, and then cooled to room temperature with the furnace to obtain the contact body 200 .

[0063] It can be understood that the material density of the contact body 200 is 4.8±0.3 g / cm 3 , chemical composition: Ag content 70wt%±5wt%, and the rest is C.

[0064] It can be understood that the material of the contact body 200 of the utility model is a silver-impregnated graphite contact material, which can organically combine the good conductivity of metallic silver with the burning resistance and arc extinguishing properties of graphite, so that the prepared silver-impregnated graphite contact material has the advantages of high strength, good conductivity, long service life, ablation resistance, and good resistance to welding.

[0065] Specifically, the connection components include:

[0066] The connecting column 310 is located at the bottom of the thermal pad 410 .

[0067] The positioning column 320 is located at the bottom of the connecting column 310 .

[0068] There are a plurality of connecting rods 330 , which are evenly arranged along the edge of the connecting column 310 and are located at the bottom of the connecting column 310 .

[0069] It can be understood that the connecting column 310 is located at the bottom of the thermal pad 410, the positioning column 320 is located at the bottom of the connecting column 310, the positioning column 320 cooperates with the connecting groove 110, and the connecting rod 330 cooperates with the connecting hole 120 to achieve precise positioning and stable connection between the contact body 200 and the base 100.

[0070] Specifically, the outer diameter of the positioning post 320 is the same as the inner diameter of the connecting groove 110 , and the length of the positioning post 320 is the same as the depth of the connecting groove 110 .

[0071] Specifically, the outer diameter of the connecting rod 330 is the same as the inner diameter of the connecting hole 120 , and the length of the connecting rod 330 is the same as the depth of the connecting hole 120 .

[0072] It can be seen that the outer diameter of the positioning column 320 is the same as the inner diameter of the connecting groove 110, which can ensure the precise positioning between the contact body 200 and the base 100; the outer diameter of the connecting rod 330 is the same as the inner diameter of the connecting hole 120, which can ensure that the connecting rod 330 can smoothly penetrate into the connecting hole 120 to achieve a stable connection between the contact body 200 and the base 100.

[0073] It can be seen that the length of the positioning column 320 is the same as the depth of the connecting groove 110, and the length of the connecting rod 330 is the same as the depth of the connecting hole 120, which can ensure that the connection between the contact body 200 and the base 100 is tight and not easy to loosen, thereby improving the stability and reliability of the electrical contact device.

[0074] Specifically, the thermal pad 410 is a thermally conductive graphite sheet.

[0075] It can be understood that the thermally conductive graphite sheet can effectively transfer the heat from the bottom surface of the contact body 200 to the connecting assembly, thereby improving the heat dissipation effect of the electrical contact device; the thermally conductive graphite sheet has good electrical conductivity, thereby ensuring the normal operation of the electrical contact device; the thermally conductive graphite sheet also has good corrosion resistance and high temperature resistance, thereby improving the service life and stability of the electrical contact device.

[0076] Specifically, the heat sink is an aluminum heat sink.

[0077] It can be understood that the aluminum heat sink can effectively conduct the heat dissipated from the surface of the contact body 200, increase the heat dissipation area, and thus improve the heat dissipation effect; the aluminum heat sink also has good corrosion resistance and high temperature resistance, which can ensure the normal operation and stability of the electrical contact device; compared with other metal heat sinks, the aluminum heat sink has a lower cost, which can reduce the production cost of the electrical contact device.

[0078] Specifically, the silver graphite electrical contact device also includes:

[0079] The contact protection cover covers the top of the contact body 200 , and is used to protect the contact body 200 from interference from the external environment.

[0080] It is understandable that the contact protection cover can cover the top of the contact body 200 to prevent the external environment from causing damage to the contact body 200, thereby improving the safety and stability of the electrical contact device.

[0081] In summary, the silver-graphite electric contact device provided in this embodiment realizes a stable connection between the contact body 200 and the base 100 through a reasonable structural design, effectively reduces the heat generated by the contact body 200 during operation, and improves the service life and stability of the electric contact device.

[0082] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A silver-graphite electrical contact device, characterized in that: include: Pedestal; The contact body is a cylindrical structure; A connecting assembly, located at the bottom of the contact body, and used to connect the contact body to the base; A heat dissipation component, the heat dissipation component comprising: A heat sink, arranged around the side of the contact body; A thermally conductive pad, one end of which is connected to the bottom surface of the contact body, and the other end of which is connected to the connecting assembly.

2. The silver-graphite electrical contact device according to claim 1, characterized in that: The base comprises: A connecting groove, located at the top of the base; There are a plurality of connecting holes, and the connecting holes are evenly distributed along the circumference of the connecting groove; An insulating layer covering the outer surface of the base; The heat dissipation hole is located at the bottom of the base and passes through the insulation layer.

3. The silver-graphite electrical contact device according to claim 2, characterized in that: The contact body comprises: A graphite matrix is ​​located inside the contact body; The silver wrapping layer is located on the outer surface of the graphite substrate.

4. The silver-graphite electric contact device according to claim 3, characterized in that: The connection component comprises: A connecting column, located at the bottom of the thermal pad; A positioning column, located at the bottom of the connecting column; There are a plurality of connecting rods, wherein the connecting rods are evenly arranged along the edge of the connecting column and are located at the bottom of the connecting column.

5. The silver-graphite electric contact device according to claim 4, characterized in that: The outer diameter of the positioning column is the same as the inner diameter of the connecting groove, and the length of the positioning column is the same as the depth of the connecting groove.

6. The silver-graphite electric contact device according to claim 4, characterized in that: The outer diameter of the connecting rod is the same as the inner diameter of the connecting hole, and the length of the connecting rod is the same as the depth of the connecting hole.

7. The silver-graphite electric contact device according to claim 1, characterized in that: The thermally conductive pad is a thermally conductive graphite sheet.

8. The silver-graphite electric contact device according to claim 1, characterized in that: The heat sink is an aluminum heat sink.

9. The silver-graphite electric contact device according to claim 1, characterized in that: The silver-graphite electric contact device also includes: The contact protection cover covers the top of the contact body, and the contact protection cover is used to protect the contact body from interference from the external environment.

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