Multi-layer composite heat-conducting gasket

Abstract

The utility model relates to the technical field of heat-conducting gaskets, in particular to a multilayer composite heat-conducting gasket which comprises a base and a terminal, limiting plates are arranged on the left end face and the right end face of the base, a top frame is slidably connected to the inner sides of the upper portions of the limiting plates, and bolts are spirally connected to the upper sides and the lower sides of the interiors of the limiting plates. The top of the hollow plate is fixedly connected with a heat source contact layer; through design cooperation, after a heat source makes contact with the heat source contact layer, heat of the heat source is conducted to the aluminum oxide layer and the metal foam layer, the aluminum oxide layer and the metal foam layer have high heat conductivity coefficients, and the metal touch sensor making contact with the heat source contact layer is arranged at the bottom of the heat source contact layer; the metal touch sensor can perform monitoring under the condition that the heat source contact layer is in contact with the heat source for a long time and is abraded, and maintenance personnel can replace the heat source contact layer in time according to signals.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-conducting pads, in particular to a multi-layer composite heat-conducting pad. Background Art

[0002] Composite thermal pads are a multi-layered thermal conductive material composed of layers of materials with different functions. They are designed to improve the heat conduction efficiency between heat-generating devices such as electronic devices, power modules, LED lighting devices and heat sinks.

[0003] The patent specification with announcement number CN215551486U discloses a multi-layer composite heat-conducting gasket, including a heat-conducting gasket body, the outer surface of which is detachably connected with a moving mechanism, the outer surface of which is coated with a wear-resistant layer, and the heat-conducting gasket body is composed of a heat-conducting silicone grease sheet, a heat-conducting ceramic sheet and a graphite gasket, and the heat-conducting ceramic sheet is located at the lower end of the graphite gasket. The multi-layer composite heat-conducting gasket described in the utility model is provided with two sets of arc-shaped card plates set on the outer surface of the heat-conducting gasket through two sets of elastic bands set, at which time the arc-shaped card plates will be firmly stuck on the outer surface of the gasket through the elastic force of the elastic band, and the arc-shaped card plates will be firmly stuck on the outer surface of the gasket through the suction cup, and finally people hold the grip rod to install and operate the heat-conducting gasket, and the cast stone powder layer, the aluminum oxide layer, the zirconium oxide layer and the steel powder layer are fixed on the outer surface of the heat-conducting gasket by an injection molding method, thereby extending the service life of the heat-conducting gasket.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned multi-layer composite thermally conductive gasket has the following problems: the thermally conductive gasket may be worn out due to long-term contact with the heat source, and the wear of the thermally conductive gasket means that the thermally conductive gasket becomes thinner as a whole, which may not only cause a gap between the thermally conductive gasket and the heat source, but also reduce the efficiency of heat conduction from the heat source to the thermally conductive gasket. At the same time, the thermally conductive gasket will be continuously worn. When the thermal conductive layer of the thermally conductive gasket is worn out, the thermal conductive effect of the thermally conductive gasket disappears, and it is difficult for maintenance personnel to know the degree of wear of the thermally conductive gasket and replace it in the first time. In view of this, a multi-layer composite thermally conductive gasket is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a multi-layer composite heat-conducting pad.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-layer composite thermally conductive gasket, comprising a base and a terminal, wherein limit plates are arranged on the left and right end surfaces of the base, a top frame is slidably connected to the inner side above the limit plate, bolts are spirally connected to the upper and lower sides inside the limit plate, a hollow plate is slidably connected to the inner side of the top frame, a heat source contact layer is fixedly connected to the top of the hollow plate, a metal touch sensor is fixedly connected to the middle of the upper part of the hollow plate, an electric wire is fixedly connected to the front side of the metal touch sensor, a high-temperature resistant rubber layer is fixedly connected to the lower part of the base, a high-temperature resistant rubber layer, a metal foam layer and an aluminum oxide layer are arranged on the inner side of the base, the top of the aluminum oxide layer is fixedly connected to the limit groove, and a thermal conductive spring is fixedly connected to the inner side of the limit groove.

[0007] As a further description of the above technical solution: one end of the wire away from the metal touch sensor is connected to the signal input end of the terminal, the outer side of the bottom end of the top frame contacts the top end of the top frame, the left and right end surfaces of the top frame and the left and right end surfaces above the base are spirally connected with bolts, the top of the base contacts the bottom end of the top frame, the upper front side of the interior of the hollow plate contacts the outer side of the wire, the top of the thermal conductive spring is fixedly connected to the bottom end of the hollow plate, the bottom end of the thermal conductive spring is fixedly connected to the top of the alumina layer, the edge of the alumina layer is fixedly connected to the upper inner wall of the base, and the heat source can be contacted with the heat source contact layer, and the heat of the heat source can be conducted to the alumina layer and the metal foam layer. The alumina layer and the metal foam layer have high thermal conductivity, can effectively conduct heat, improve the efficiency of thermal management, and effectively transfer heat.

[0008] As a further description of the above technical solution: the number of the limit plates is four, and the limit plates are distributed on the front and rear sides of the left and right end surfaces of the base and the top frame, the number of the bolts is twice the number of the limit plates, and reserved holes are provided on the front and rear sides of the left and right end surfaces of the base and the limit plates, and the diameter of the reserved holes matches the diameter of the longitudinal section of the inner top of the bolts. The inner wall of the reserved hole is provided with an internal thread, and the limit plate and the bolt can be used to connect and fix the limit plate to the top frame, so that after the subsequent heat source contact layer is worn away due to long-term contact with the heat source, a new heat source contact layer can be quickly fixed on the top of the hollow plate.

[0009] As a further description of the above technical solution: the metal touch sensor is electrically connected to the terminal through an electric wire, a square groove is provided in the upper middle of the hollow plate and a strip groove is provided in the middle of the front side of the square groove, the depth and cross-sectional shape of the square groove match the thickness and cross-sectional shape of the metal touch sensor, and the inner width and depth of the strip groove match the longitudinal section diameter of the electric wire, the material of the hollow plate is the same as that of the heat source contact layer, the metal touch sensor can be monitored when the heat source contact layer is in contact with the heat source for a long time and wears out, if the heat source is roughly combined with the metal touch sensor, the metal sensor emits a set of signals, which are received by the terminal, and the maintenance personnel can replace the heat source contact layer in time according to the signal.

[0010] As a further description of the above technical solution: the number of the thermal conductive springs and the limit grooves are four, and the thermal conductive springs and the limit grooves are distributed at the four corners of the top of the alumina layer. The thermal conductive springs not only conduct the heat conducted by the heat source contact layer to the alumina layer, but also when the heat source contact layer is worn and becomes thinner, the thermal conductive springs can also keep the heat source contact layer and the hollow plate always pushed up, so that the heat source contact layer is always close to the heat source.

[0011] As a further description of the above technical solution: a groove is opened in the middle of the inner side of the base, and the cross-sectional shape and size of the groove match the cross-sectional shape and size of the high-temperature resistant rubber layer, the metal foam layer and the aluminum oxide layer. The thickness of the high-temperature resistant rubber layer, the metal foam layer and the aluminum oxide layer are one-third of the depth of the groove in the middle of the inner side of the base. The high-temperature resistant rubber layer, the metal foam layer and the aluminum oxide layer evenly distributed on the inner side of the base can protect sensitive components from damage by thermal stress and environmental factors.

[0012] As a further description of the above technical solution: the high temperature resistant rubber layer is arranged at the bottom of the inner side of the base, the metal foam layer is arranged in the middle of the inner side of the base, and the aluminum oxide layer is arranged above the inner side of the base. The high temperature resistant rubber layer, the metal foam layer and the aluminum oxide layer are bonded and fixed to each other with a high temperature resistant adhesive. The metal foam layer and the aluminum oxide layer serve as heat conductive layers, the high temperature resistant rubber layer serves as the bottom layer, the heat source contact layer contacts the heat source, the heat conductive layer is responsible for heat conduction, and the bottom layer protects the heat conductive layer and provides compatibility with the contact object on the other side.

[0013] The utility model has the following beneficial effects:

[0014] The multi-layer composite heat-conducting pad designed by the utility model can, through design coordination, enable the device to not only conduct the heat of the heat source to the aluminum oxide layer and the metal foam layer after the heat source contacts the heat source contact layer, but also conduct the heat of the heat source to the aluminum oxide layer and the metal foam layer. The aluminum oxide layer and the metal foam layer have high thermal conductivity, can effectively conduct heat, improve the efficiency of thermal management, effectively transfer heat, and protect sensitive components from damage by thermal stress and environmental factors. In addition, a hollow plate is arranged at the bottom of the heat source contact layer, and a metal touch sensor in contact with the heat source contact layer is arranged inside the hollow plate. The metal touch sensor can be in contact with the heat source contact layer for a long time. Monitoring is carried out in the case of wear. If the heat source is roughly combined with the metal touch sensor, the metal sensor will emit a set of signals, which will be received by the terminal. The maintenance personnel can replace the heat source contact layer in time according to the signal. At the same time, a thermal conductive spring is arranged at the bottom of the hollow plate, which not only conducts the heat conducted by the heat source contact layer to the alumina layer, but also allows the heat source contact layer and the hollow plate to be always pushed up when the heat source contact layer is worn and becomes thinner, so that the heat source contact layer is always close to the heat source, so as to avoid the situation where the gap between the heat source contact layer and the heat source becomes larger after the heat source contact layer becomes thinner due to wear, thereby resulting in a decrease in thermal conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of the top frame of the utility model;

[0017] Figure 3 It is a schematic diagram of the explosion three-dimensional structure of the heat source contact layer of the utility model;

[0018] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the base of the utility model.

[0019] Legend:

[0020] 1. Base; 2. Limiting plate; 3. Top frame; 4. Bolts; 5. Heat source contact layer; 6. Wires; 7. Hollow plate; 8. Thermal spring; 9. Terminal; 10. Metal touch sensor; 11. High temperature resistant rubber layer; 12. Metal foam layer; 13. Aluminum oxide layer; 14. Limiting groove. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 4The utility model provides a multi-layer composite thermal conductive gasket, including a base 1 and a terminal 9. The left and right end surfaces of the base 1 are provided with limit plates 2 connected by bolts 4. The upper inner side of the limit plate 2 is longitudinally inserted into the inner side of the top frame 3. The upper and lower sides of the limit plate 2 are spirally connected with bolts 4. The inner side of the top frame 3 is inserted and slid by a hollow plate 7. The top of the hollow plate 7 is adhered to the heat source contact layer 5 by a high-temperature resistant adhesive. The metal touch sensor 10 is inserted and fixed in the middle of the upper part of the hollow plate 7. The front side of the metal touch sensor 10 is provided with a wire 6. The lower part of the base 1 is adhered to the high-temperature resistant rubber layer 11 by a high-temperature resistant adhesive. The inner side of the base 1 is provided with a high-temperature resistant rubber layer 11, a metal foam layer 12 and an aluminum oxide layer 13. The top of the aluminum oxide layer 13 is fixed by welding to a limit groove 14. The inner side of the limit groove 14 is fixed by welding to a conductive The thermal spring 8 and the end of the wire 6 away from the metal touch sensor 10 are connected to the signal input end of the terminal 9, the outer side of the bottom end of the top frame 3 contacts the top end of the top frame 3, the left and right end surfaces of the top frame 3 and the left and right end surfaces above the base 1 are spirally connected with the bolt 4, the top of the base 1 contacts the bottom end of the top frame 3, the upper front side of the interior of the hollow plate 7 contacts the outer side of the wire 6, the top of the thermal conductive spring 8 is fixedly connected to the bottom end of the hollow plate 7, the bottom end of the thermal conductive spring 8 is fixedly connected to the top of the aluminum oxide layer 13, and the edge of the aluminum oxide layer 13 is fixedly connected to the upper inner wall of the base 1. After the heat source contacts the heat source contact layer 5, the heat of the heat source can be conducted to the aluminum oxide layer 13 and the metal foam layer 12. The aluminum oxide layer 13 and the metal foam layer 12 have high thermal conductivity, can effectively conduct heat, improve the efficiency of thermal management, and effectively transfer heat.

[0022] As a further implementation scheme of the above technical scheme: the number of limit plates 2 is four, and the limit plates 2 are distributed on the front and rear sides of the left and right end surfaces of the base 1 and the top frame 3, the number of bolts 4 is twice the number of limit plates 2, and reserved holes are set on the front and rear sides of the left and right end surfaces of the base 1 and the limit plates 2, and the diameter of the reserved holes matches the longitudinal section diameter of the inner top of the bolt 4, and the inner wall of the reserved hole is provided with an internal thread, and the limit plate 2 and the bolt 4 can be used to connect and fix the limit plate 2 to the top frame 3, so that after the subsequent heat source contact layer 5 is worn away due to long-term contact with the heat source, a new heat source contact layer 5 can be quickly fixed on the top of the hollow plate 7.

[0023] As a further implementation scheme of the above technical scheme: the metal touch sensor 10 is electrically connected to the terminal 9 through the wire 6, a square groove is opened in the middle of the upper part of the hollow plate 7, and a strip groove is opened in the middle of the front side of the square groove. The depth and cross-sectional shape of the square groove match the thickness and cross-sectional shape of the metal touch sensor 10, and the inner width and depth of the strip groove match the longitudinal section diameter of the wire 6. The material of the hollow plate 7 is the same as that of the heat source contact layer 5. The metal touch sensor 10 can be monitored when the heat source contact layer 5 is in contact with the heat source for a long time and wears out. If the heat source is roughly combined with the metal touch sensor 10, the metal sensor emits a set of signals, which are received by the terminal 9, and the maintenance personnel can replace the heat source contact layer 5 in time according to the signal.

[0024] As a further implementation scheme of the above technical scheme: the number of thermal conductive springs 8 and limiting grooves 14 are four, and the thermal conductive springs 8 and limiting grooves 14 are distributed at the four corners of the top of the aluminum oxide layer 13. The thermal conductive springs 8 not only conduct the heat conducted by the heat source contact layer 5 to the aluminum oxide layer 13, but also when the heat source contact layer 5 is worn and becomes thinner, the thermal conductive springs 8 can also keep the heat source contact layer 5 and the hollow plate 7 always pushed up, so that the heat source contact layer 5 is always close to the heat source.

[0025] As a further implementation scheme of the above technical scheme: a groove is opened in the middle of the inner side of the base 1, and the cross-sectional shape and size of the groove match the cross-sectional shape and size of the high-temperature resistant rubber layer 11, the metal foam layer 12 and the aluminum oxide layer 13. The thickness of the high-temperature resistant rubber layer 11, the metal foam layer 12 and the aluminum oxide layer 13 are one-third of the depth of the groove in the middle of the inner side of the base 1. The high-temperature resistant rubber layer 11, the metal foam layer 12 and the aluminum oxide layer 13 evenly distributed on the inner side of the base 1 can protect sensitive components from damage by thermal stress and environmental factors.

[0026] As a further implementation scheme of the above technical scheme: the high temperature resistant rubber layer 11 is arranged at the bottom inner side of the base 1, the metal foam layer 12 is arranged in the middle inner side of the base 1, and the aluminum oxide layer 13 is arranged on the upper inner side of the base 1. The high temperature resistant rubber layer 11, the metal foam layer 12 and the aluminum oxide layer 13 are bonded and fixed to each other with a high temperature resistant adhesive. The metal foam layer 12 and the aluminum oxide layer 13 serve as heat conductive layers, the high temperature resistant rubber layer 11 serves as a bottom layer, the heat source contact layer 5 contacts the heat source, the heat conductive layer is responsible for heat conduction, and the bottom layer protects the heat conductive layer and provides compatibility with the contact object on the other side.

[0027] The specific model of the metal touch sensor 10 is a KY-036 metal touch sensor module, and the present application does not make any changes to the interior of the metal touch sensor 10, so the present application does not further describe it.

[0028] Working principle:

[0029] When using the utility model, take out the base 1, and place the high temperature resistant rubber layer 11, the metal foam layer 12 and the aluminum oxide layer 13 on the inner side of the base 1 in sequence, first the high temperature resistant rubber layer 11. After the high temperature resistant rubber layer 11 is inserted into the lower inner side of the base 1, the high temperature resistant adhesive is evenly applied on the top of the high temperature resistant rubber layer 11, and then the metal foam layer 12 is placed on the top of the high temperature resistant rubber layer 11. After the high temperature resistant adhesive between the metal foam layer 12 and the high temperature resistant rubber layer 11 is cooled, the high temperature resistant adhesive is also evenly applied on the top of the metal foam layer 12, and then the bottom of the aluminum oxide layer 13 is placed on the top of the metal foam layer 12. After waiting for the high temperature resistant adhesive to cool, take out the hollow plate 7 and the heat source contact layer 5, insert the metal touch sensor 10 into the square groove at the top of the hollow plate 7, and the wire 6 connecting the metal touch sensor 10 is also inserted into the strip groove on the front side of the square groove, and then the high temperature resistant adhesive is evenly applied on the top of the hollow plate 7 and the outer side of the metal touch sensor 10, and then the middle of the bottom of the heat source contact layer 5 is in contact with the middle of the top of the hollow plate 7, and the cold After that, the hollow plate 7 is inserted into the inner side of the top frame 3 from top to bottom. After the installation is completed, the top end of the heat-conducting spring 8 on the inner side of the limiting groove 14 is welded and fixed to the bottom of the hollow shell, and the limiting groove 14 is set on the top of the alumina layer 13. Then, the top frame 3 is placed on the top of the base 1, and the limiting plate 2 and the bolt 4 are taken out. The bolt 4 is inserted into the limiting plate 2, and then the inner top end of the bolt 4 is aligned with the reserved hole at the edge of the top frame 3 and the base 1. Tighten the bolt 4 to fix the top frame 3 and the base 1. After preparation is completed, the heat source contact layer 5 is directly in contact with the heat source. When the heat The heat source contact layer 5 is in contact with the heat source for a long time and becomes thinner due to wear. The thermal conductive spring 8 continues to push the hollow plate 7 and the heat source contact layer 5 upward to keep the heat source contact layer 5 in contact with the heat source at all times. When the heat source contact layer 5 is worn to disappear, the heat source directly contacts the metal touch sensor 10 above the inside of the hollow plate 7. At this time, the metal touch sensor 10 detects the metal and directly transmits the signal to the terminal 9 through the wire 6. The maintenance personnel can also judge the degree of wear of the heat source contact layer 5 through the terminal 9 and replace it in time.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer composite thermally conductive pad, comprising a base (1) and a terminal (9), characterized in that: The left and right end surfaces of the base (1) are provided with limit plates (2), the upper inner side of the limit plate (2) is slidably connected to a top frame (3), the upper and lower sides of the limit plate (2) are spirally connected with bolts (4), the inner side of the top frame (3) is slidably connected to a hollow plate (7), the top of the hollow plate (7) is fixedly connected to a heat source contact layer (5), the upper middle of the hollow plate (7) is fixedly connected to a metal touch sensor (10), the front side of the metal touch sensor (10) is fixedly connected to a wire (6), the lower part of the base (1) is fixedly connected to a high temperature resistant rubber layer (11), the inner side of the base (1) is provided with a high temperature resistant rubber layer (11), a metal foam layer (12) and an aluminum oxide layer (13), the top of the aluminum oxide layer (13) is fixedly connected to a limit groove (14), and the inner side of the limit groove (14) is fixedly connected to a heat conductive spring (8).

2. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: The end of the wire (6) away from the metal touch sensor (10) is connected to the signal input end of the terminal (9); the outer side of the bottom end of the top frame (3) contacts the top end of the top frame (3); the left and right end surfaces of the top frame (3) and the left and right end surfaces above the base (1) are spirally connected to the bolts (4); the top end of the base (1) contacts the bottom end of the top frame (3); the upper front side of the interior of the hollow plate (7) contacts the outer side of the wire (6); the top end of the heat-conducting spring (8) is fixedly connected to the bottom end of the hollow plate (7); the bottom end of the heat-conducting spring (8) is fixedly connected to the top of the aluminum oxide layer (13); and the edge of the aluminum oxide layer (13) is fixedly connected to the upper inner wall of the base (1).

3. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: The number of the limiting plates (2) is four, and the limiting plates (2) are distributed on the front and rear sides of the left and right end surfaces of the base (1) and the top frame (3). The number of the bolts (4) is twice the number of the limiting plates (2). The front and rear sides of the left and right end surfaces of the base (1) and the limiting plates (2) are provided with reserved holes, and the diameter of the reserved holes matches the diameter of the longitudinal section of the inner top end of the bolt (4). The inner wall of the reserved hole is provided with an internal thread.

4. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: The metal touch sensor (10) is electrically connected to the terminal (9) via the wire (6); a square groove and a strip groove in the middle of the front side of the square groove are provided in the upper part of the hollow plate (7); the depth and cross-sectional shape of the square groove match the thickness and cross-sectional shape of the metal touch sensor (10); and the inner width and depth of the strip groove match the longitudinal section diameter of the wire (6); the material of the hollow plate (7) is the same as that of the heat source contact layer (5).

5. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: The number of the heat-conducting springs (8) and the limiting grooves (14) is four, and the heat-conducting springs (8) and the limiting grooves (14) are distributed at the four corners of the top of the aluminum oxide layer (13).

6. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: A groove is provided in the middle of the inner side of the base (1), and the cross-sectional shape and size of the groove match the cross-sectional shapes and sizes of the high-temperature resistant rubber layer (11), the metal foam layer (12) and the aluminum oxide layer (13). The thickness of the high-temperature resistant rubber layer (11), the metal foam layer (12) and the aluminum oxide layer (13) is one third of the depth of the groove in the middle of the inner side of the base (1).

7. The multi-layer composite thermally conductive gasket according to claim 1, characterized in that: The high temperature resistant rubber layer (11) is arranged at the bottom of the inner side of the base (1), the metal foam layer (12) is arranged in the middle of the inner side of the base (1), and the aluminum oxide layer (13) is arranged on the upper inner side of the base (1). The high temperature resistant rubber layer (11), the metal foam layer (12) and the aluminum oxide layer (13) are bonded and fixed to each other using a high temperature resistant adhesive.

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