Retractable silver graphite electrical contact

Abstract

The utility model relates to the technical field of electrical contacts, and particularly discloses a retractable silver graphite electrical contact, which comprises a contact body. The groove is formed in the tail end of the contact body; the protruding ring sleeves the end part of the contact body, and the bottom surface of the protruding ring is flush with the bottom surface of the groove; the first insulating layer is attached to the inner surface of the groove; the second insulating layer is connected with the bottom surface of the protruding ring and the bottom surface of the groove; the top of the connecting cylinder is connected with the upper surface of the protruding ring; and one end of the moving assembly is connected with the inner top surface of the groove. According to the retractable silver graphite electric contact, the electric contact can be retracted and unfolded through the stretching of the moving assembly, and the universality and the flexibility of the electric contact are improved.

Description

Technical Field

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

[0002] As a key component in electrical connection, the performance and quality of electrical contacts directly affect the stability and reliability of the entire electrical system. In electrical equipment, electrical contacts play the role of a bridge connecting current and signals, and are an indispensable component to ensure the normal operation of the power system.

[0003] In the manufacturing process of electrical contacts, the selection of materials is crucial. Common electrical contact materials include copper, silver, gold, etc. These materials have good conductivity and corrosion resistance, and can effectively ensure the smooth transmission of current. In addition, the structural design of the electrical contact is also a key factor affecting its performance. Reasonable structural design can not only improve the contact performance of the electrical contact, but also reduce the contact resistance and reduce energy loss.

[0004] Existing electrical contacts cannot adjust their length according to usage requirements, resulting in their performance not being able to reach optimal levels in certain application scenarios.

[0005] Therefore, how to solve the problem that the existing electrical contacts cannot adjust their length according to the needs of use, resulting in their performance failing to reach the optimal state in certain application scenarios, has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model proposes a retractable silver-graphite electrical contact to address the deficiencies in the prior art, aiming to solve the problem that the existing electrical contacts cannot adjust their length according to the needs of use, resulting in their performance failing to reach the optimal state in certain application scenarios.

[0007] The technical solution of the utility model is:

[0008] The utility model provides a retractable silver-graphite electric contact, comprising:

[0009] Contact body;

[0010] A groove is formed at the rear end of the contact body;

[0011] A protruding ring, sleeved on the end of the contact body, wherein the bottom surface of the protruding ring is flush with the bottom surface of the groove;

[0012] A first insulating layer is bonded to the inner surface of the groove;

[0013] a second insulating layer connected to the bottom surface of the protruding ring and the bottom surface of the groove;

[0014] A connecting cylinder, the top of which is connected to the upper surface of the protruding ring; and a moving component, one end of which is connected to the inner top surface of the groove.

[0015] Furthermore, the retractable silver-graphite electrical contact also includes:

[0016] A sleeve, the top of which is connected to the bottom of the connecting tube.

[0017] Furthermore, the mobile component comprises:

[0018] a first spring, one end of which is connected to the inner top surface of the groove;

[0019] A connecting block, one end of which is connected to the other end of the first spring;

[0020] There are two sliders, and the two sliders are arranged opposite to each other at one end of the connecting block away from the first spring;

[0021] The slide groove is arranged on the left and right sides of the connecting tube, and the slide groove is matched with the sliding block.

[0022] Furthermore, the mobile component also includes:

[0023] A driving rod is located inside the sleeve, and one end of the driving rod is connected to the other end of the connecting block;

[0024] A push rod, one end of which is connected to the other end of the driving rod, and the other end of the push rod extends out of the sleeve.

[0025] Furthermore, the mobile component also includes:

[0026] There are a plurality of limiting holes, and the plurality of limiting holes are evenly arranged on the cylinder body of the sleeve along the vertical direction;

[0027] A telescopic column, wherein the telescopic column is perpendicular to the driving rod, one end of the telescopic column is connected to the driving rod, and the other end of the telescopic column can extend out of the limiting hole or be connected to the inner surface of the sleeve.

[0028] Furthermore, the contact body comprises:

[0029] Graphite matrix;

[0030] The silver wrapping layer is coated on the outer surface of the graphite substrate.

[0031] Furthermore, the retractable silver-graphite electrical contact also includes:

[0032] The anti-oxidation layer covers the outer surfaces of the first insulating layer and the second insulating layer.

[0033] Furthermore, the anti-oxidation layer is an aluminum oxide anti-oxidation layer.

[0034] Furthermore, the first insulating layer and the second insulating layer are both ceramic insulating layers.

[0035] Furthermore, the retractable silver-graphite electrical contact also includes:

[0036] A contact protection cover is detachably covered on the outside of the contact body.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] The groove of the utility model is opened at the tail end of the contact body, which can provide additional support and stability for the contact body. The protruding ring can effectively prevent dust and dirt from entering the inside of the groove, ensuring the normal operation of the electrical contact; the first insulating layer fits the inner surface of the groove, which can effectively isolate the contact body from the external environment; the second insulating layer is connected to the bottom surface of the protruding ring and the bottom surface of the groove, further enhancing the insulation performance of the electrical contact and improving the safety of use; one end of the moving component is connected to the inner top surface of the groove, and the electrical contact can be retracted and expanded by the extension and contraction of the moving component, which improves the versatility and flexibility of the electrical contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the retractable silver-graphite electric contact telescopic column of the utility model when it is not stuck in the limiting hole;

[0040] Figure 2 The utility model is a schematic diagram of the overall structure when the telescopic column of the retractable silver-graphite electric contact is stuck in the limiting hole.

[0041] In the figure: 100, contact body; 110, groove; 111, first insulating layer; 120, protruding ring; 121, second insulating layer; 130, connecting tube; 140, sleeve; 150, first spring; 160, connecting block; 170, slider; 180, driving rod; 181, telescopic column; 182, limiting hole; 190, pushing rod. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 1-2 As shown, this embodiment provides a retractable silver-graphite electrical contact, comprising:

[0047] The contact body 100 .

[0048] The groove 110 is formed at the rear end of the contact body 100 .

[0049] The protruding ring 120 is sleeved on the end of the contact body 100 , and the bottom surface of the protruding ring 120 is flush with the bottom surface of the groove 110 .

[0050] The first insulating layer 111 is in contact with the inner surface of the groove 110 .

[0051] The second insulating layer 121 is connected to the bottom surface of the protruding ring 120 and the bottom surface of the groove 110 .

[0052] The connecting tube 130 has one end connected to the upper surface of the protruding ring 120 .

[0053] A moving component, one end of which is connected to the inner top surface of the groove 110 .

[0054] It can be seen that the groove 110 is opened at the tail end of the contact body 100, which can provide additional support and stability for the contact body 100. The protruding ring 120 can effectively prevent dust and dirt from entering the groove 110, ensuring the normal operation of the electrical contact; the first insulating layer 111 is in contact with the inner surface of the groove 110, which can effectively isolate the contact body 100 from the external environment; the second insulating layer 121 is connected to the bottom surface of the protruding ring 120 and the bottom surface of the groove 110, further enhancing the insulation performance of the electrical contact and improving the safety of use; one end of the moving component is connected to the inner top surface of the groove 110, and the electrical contact can be retracted and expanded by the extension and contraction of the moving component, which improves the versatility and flexibility of the electrical contact.

[0055] Specifically, the retractable silver graphite electrical contact also includes:

[0056] The sleeve 140 has a top connected to the bottom of the connecting tube 130 .

[0057] It can be understood that the top of the sleeve 140 is connected to the bottom of the connecting cylinder 130, which can further enhance the structural stability and connection reliability of the electrical contact.

[0058] Specifically, the mobile components include:

[0059] The first spring 150 has one end connected to the inner top surface of the groove 110 .

[0060] The connecting block 160 has one end connected to the other end of the first spring 150 .

[0061] There are two sliders 170 , and the two sliders 170 are arranged opposite to each other at one end of the connecting block 160 away from the first spring 150 .

[0062] The slide groove is provided on the left and right sides of the connecting tube 130 , and the slide groove is adapted to the sliding block 170 .

[0063] Specifically, the mobile components also include:

[0064] The driving rod 180 is located inside the sleeve 140 , and one end of the driving rod 180 is connected to the other end of the connecting block 160 .

[0065] A push rod 190 , one end of which is connected to the other end of the driving rod 180 , and the other end of the push rod 190 extends out of the sleeve 140 .

[0066] It can be understood that one end of the first spring 150 is connected to the inner top surface of the groove 110, and the other end of the first spring 150 is connected to the connecting block 160, so that the movement of the contact body 100 can be realized; the slider 170 is relatively arranged at the end of the connecting block 160 away from the first spring 150, and the slider 170 is adapted to the slide groove, which can ensure the stability and smoothness of the connecting block 160 during the movement; the driving rod 180 is located inside the sleeve 140, one end of which is connected to the other end of the connecting block 160, and the other end of the driving rod 180 is connected to one end of the pushing rod 190, and the other end of the pushing rod 190 extends out of the sleeve 140, and the driving rod 180 and the connecting block 160 can be driven to move by pushing the pushing rod 190, thereby realizing the contraction and expansion of the electrical contact.

[0067] Specifically, the mobile components also include:

[0068] There are a plurality of limiting holes 182 , and the plurality of limiting holes 182 are evenly arranged on the body of the sleeve 140 along the vertical direction.

[0069] The telescopic column 181 is perpendicular to the driving rod 180 , one end of the telescopic column 181 is connected to the driving rod 180 , and the other end of the telescopic column 181 can extend out of the limiting hole 182 or be connected to the inner surface of the sleeve 140 .

[0070] It can be seen that the limiting holes 182 are evenly arranged on the barrel of the sleeve 140 along the vertical direction. When the contact body 100 needs a corresponding length, the driving rod 180 is driven by pushing the pushing rod 190, so that the telescopic column 181 is stuck in the corresponding limiting hole 182. When the length of the contact body 100 needs to be adjusted, the telescopic column 181 can be retracted into the sleeve 140 by pressing, and then the pushing rod 190 is pushed again to drive the driving rod 180 so that the telescopic column 181 is stuck in the corresponding limiting hole 182. This is conducive to improving the adaptability and flexibility of the electric contact, so that it can adapt to different working environments and usage requirements. The telescopic column 181 can also effectively prevent the electric contact from shaking or being unstable during the contraction and expansion process, thereby improving the stability and reliability of the electric contact.

[0071] Specifically, the contact body 100 includes:

[0072] Graphite matrix.

[0073] The silver coating layer is coated on the outer surface of the graphite substrate.

[0074] It can be understood that the preparation method of the contact body 100 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% to 40% of the total weight of the raw materials and the binder, and then pressed into shape; then calcined at 850°C to 950°C, and finally graphitized at 2850°C ± 50 to prepare a graphite matrix. The graphite matrix 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 to form a silver coating layer, and the entire graphite matrix is ​​wrapped with the silver coating layer 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 100 .

[0075] It is understood that the material density of the contact body 100 is 4.8±0.3 g / cm 3 , chemical composition: Ag content 70wt%±5wt%, and the rest is C.

[0076] Specifically, the retractable silver graphite electrical contact also includes:

[0077] The anti-oxidation layer covers the outer surfaces of the first insulating layer 111 and the second insulating layer 121 .

[0078] Specifically, the anti-oxidation layer is an aluminum oxide anti-oxidation layer.

[0079] Specifically, the first insulating layer 111 and the second insulating layer 121 are both ceramic insulating layers.

[0080] Specifically, the retractable silver graphite electrical contact also includes:

[0081] The contact protection cover is detachably covered on the outside of the contact body 100 .

[0082] It can be understood that the anti-oxidation layer can effectively prevent the first insulating layer 111 and the second insulating layer 121 from being corroded and oxidized by the external environment, thereby improving the service life and stability of the electrical contact; the aluminum oxide anti-oxidation layer has high corrosion resistance and oxidation resistance, and can effectively protect the electrical contact from the influence of the external environment; the ceramic insulating layer has excellent insulation performance and high temperature resistance, and can effectively isolate the contact body 100 from the external environment, thereby improving the safety and stability of the electrical contact; the contact protection cover can be detachably covered on the outside of the contact body 100, and can effectively protect the contact body 100 from damage and pollution of the external environment, thereby improving the service life and stability of the electrical contact.

[0083] 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 retractable silver-graphite electrical contact, characterized in that: include: Contact body; A groove is formed at the rear end of the contact body; A protruding ring, sleeved on the end of the contact body, wherein the bottom surface of the protruding ring is flush with the bottom surface of the groove; A first insulating layer is bonded to the inner surface of the groove; a second insulating layer connected to the bottom surface of the protruding ring and the bottom surface of the groove; A connecting tube, the top of which is connected to the upper surface of the protruding ring; A moving component, one end of which is connected to the inner top surface of the groove.

2. The retractable silver-graphite electrical contact according to claim 1, characterized in that: The retractable silver-graphite electrical contact also includes: A sleeve, the top of which is connected to the bottom of the connecting tube.

3. The retractable silver-graphite electrical contact according to claim 2, characterized in that: The mobile assembly comprises: a first spring, one end of which is connected to the inner top surface of the groove; A connecting block, one end of which is connected to the other end of the first spring; There are two sliders, and the two sliders are arranged opposite to each other at one end of the connecting block away from the first spring; The slide groove is arranged on the left and right sides of the connecting tube, and the slide groove is matched with the sliding block.

4. The retractable silver-graphite electrical contact according to claim 3, characterized in that: The mobile component also includes: A driving rod is located inside the sleeve, and one end of the driving rod is connected to the other end of the connecting block; A push rod, one end of which is connected to the other end of the driving rod, and the other end of the push rod extends out of the sleeve.

5. The retractable silver-graphite electrical contact according to claim 4, characterized in that: The mobile component also includes: There are a plurality of limiting holes, and the plurality of limiting holes are evenly arranged on the cylinder body of the sleeve along the vertical direction; A telescopic column, wherein the telescopic column is perpendicular to the driving rod, one end of the telescopic column is connected to the driving rod, and the other end of the telescopic column can extend out of the limiting hole or be connected to the inner surface of the sleeve.

6. The retractable silver-graphite electrical contact according to claim 1, characterized in that: The contact body comprises: Graphite matrix; The silver wrapping layer is coated on the outer surface of the graphite substrate.

7. The retractable silver-graphite electrical contact according to claim 1, characterized in that: The retractable silver-graphite electrical contact also includes: The anti-oxidation layer covers the outer surfaces of the first insulating layer and the second insulating layer.

8. The retractable silver-graphite electrical contact according to claim 7, characterized in that: The anti-oxidation layer is an aluminum oxide anti-oxidation layer.

9. The retractable silver-graphite electrical contact according to claim 1, characterized in that: The first insulating layer and the second insulating layer are both ceramic insulating layers.

10. The retractable silver-graphite electrical contact according to claim 1, characterized in that: The retractable silver-graphite electrical contact also includes: A contact protection cover is detachably covered on the outside of the contact body.

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