CN220233174U

CN220233174U - Heat dissipation clamping mechanism of power device

Info

Publication number: CN220233174U
Application number: CN202320753049.9U
Authority: CN
Inventors: 韦理斌; 杨思齐; 任素云; 戴清明
Original assignee: Huizhou Blueway Electronic Co Ltd
Current assignee: Huizhou Blueway Electronic Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-12-22
Anticipated expiration: 2033-04-06

Abstract

The heat dissipation clamping mechanism of the power device comprises a mounting platform and heat dissipation fins opposite to the mounting platform; the side of the mounting platform facing the radiating fins is also provided with a mounting groove; the clamping piece comprises a crimping part and an elastic supporting part which are connected through a folding angle; the elastic supporting part is arranged in the mounting groove and is propped against the side wall of the mounting groove to hang on the side edge of the mounting platform at a supporting folding angle; the compression joint part is used for pressing one side of the power device, which is opposite to the heat dissipation piece; the radiating fins also comprise a guide hole opposite to the folding angle; the bolt body penetrates through the radiating fins through the guide holes and is propped against the folded angle; the clamping degree of the compression joint part to the radiating fins can be controlled by adjusting the compression folding angle of the bolt body, so that the power device is more convenient to assemble and disassemble. Meanwhile, the problems of device damage and poor lamination caused by the power device through-hole structure are avoided, and the heat conduction reliability is improved.

Description

Heat dissipation clamping mechanism of power device

Technical Field

The application relates to the technical field of power control, in particular to a heat dissipation clamping mechanism of a power device.

Background

The power device refers to an electronic component with larger output power, mainly comprises a diode, a triode, a MOS tube and the like, and in order to meet the heat dissipation requirements of different power devices, different heat dissipation devices are often required to be selected or designed according to the structure of the power device.

In a power supply control system, a power device such as an MOS tube or an IGBT is usually used as a main switching element, and the power device has the characteristics of large heating value and quick heating, and the situation that products are damaged due to poor heat dissipation is unavoidable. At present, in order to dissipate heat of a power device, the power device is usually installed on an integrated heat dissipation part of a power supply, and the power device is tightly attached to the heat dissipation part and screwed and fixed after penetrating through the power device by utilizing a screw, so that the power device is ensured to be in close contact with the heat dissipation part, the thermal resistance is reduced, and good heat dissipation is ensured.

However, in this fixing manner, a special process is required to process a bolt hole with a larger area on the power device, the power device is easy to damage in the processing process, and because of the structural limitation of the heat dissipation piece, the power device is generally fixed at one side edge or in a corner of the heat dissipation piece, the screw mounting position is close to the inner side of the heat dissipation piece, so that the disassembly and assembly are not facilitated, if the power device is not fixed in place, the poor lamination between the power device and the heat dissipation piece is easy to cause, so that the problem of poor heat dissipation is caused, and the manufacturing cost and the heat dissipation maintenance cost of the power device are higher.

Disclosure of Invention

The embodiment of the application provides a heat dissipation clamping mechanism of a power device, which does not need to be provided with holes on the power device, and is convenient to assemble and disassemble, so that the manufacturing and maintenance cost of the power device is reduced.

The application discloses a heat dissipation clamping mechanism of a power device, which comprises a clamping piece, a bolt body and a heat dissipation piece which is tightly attached to the power device;

the heat dissipation piece comprises a mounting platform and heat dissipation fins opposite to the mounting platform; a mounting groove is formed in one side of the mounting platform facing the radiating fins;

the clamping piece comprises a crimping part and an elastic supporting part which are connected through a folding angle; the elastic supporting part is arranged in the mounting groove and is propped against the side wall of the mounting groove to support the folded angle to be hung on the side edge of the mounting platform; the pressure joint part is used for pressing one side of the power device, which is opposite to the heat dissipation piece;

the radiating fins further comprise a guide hole opposite to the folding angle; the bolt body penetrates through the radiating fins through the guide holes and is propped against the folding angle.

Optionally, the mounting groove is recessed inwards near the side wall of the heat dissipation piece to form a clamping groove;

one end of the elastic supporting part connected with the folded angle is embedded in the clamping groove; the other end of the elastic supporting part is propped against the side wall of the mounting groove, which is far away from the heat dissipation piece.

Optionally, the clamping groove comprises a first guide surface and a second guide surface which are obliquely arranged with each other;

the first guide surface can be matched with the folding angle; the second guide surface can be matched with the elastic supporting part.

Optionally, the clamping member is integrally formed.

Optionally, the side end of the crimping part is bent towards the side opposite to the power device to form a bent position;

the crimping part is propped against the power device through the bent position.

Optionally, the heat dissipation element further includes a positioning structure, and the positioning structure is disposed at one end of the heat dissipation element, which is close to the pin of the power device.

Optionally, at least one end of the plug body is provided with a locking structure.

Optionally, the heat dissipation fins and the mounting platform are arranged in parallel.

Optionally, the heat dissipation fins include at least two, and the heat dissipation fins are arranged in parallel at intervals.

Optionally, the bolt body is a bolt, and the guide hole is a screw hole matched with the bolt body.

From the above, the heat dissipation clamping mechanism of the power device is characterized in that the elastic supporting part is arranged in the mounting groove and is propped against the side wall of the mounting groove, and the elastic supporting part is hung on the side edge of the mounting platform through the supporting folding angle; the crimping part is propped against one side of the power device, which is opposite to the heat dissipation piece, and the clamping degree of the crimping part to the heat dissipation fins can be controlled by adjusting the bolt body to compress the folding angle, so that the power device is more convenient to assemble and disassemble. Meanwhile, the problems of device damage and poor lamination caused by the power device through-hole structure are avoided, and the heat conduction reliability is improved.

Drawings

Fig. 1 is a schematic structural diagram of a clamping state of a heat dissipation clamping mechanism of a power device according to an embodiment of the present application.

Fig. 2 is a schematic partial structure diagram of an open state of a heat dissipation clamping mechanism of a power device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a clamping member of a heat dissipation clamping mechanism of a power device according to an embodiment of the present application.

Reference numerals:

1 a clamping piece, 11 folding angles, 12 crimping parts, 121 bending positions and 13 elastic supporting parts;

2, a bolt body;

3 a heat dissipation piece, a 31 mounting platform, a 311 mounting groove, a 312 clamping groove, a 313 first guide surface, a 314 second guide surface, 32 heat dissipation fins and 321 guide holes;

4 power devices, 41 pins.

Detailed Description

The preferred embodiments of the present application will be described in detail below with reference to the attached drawings so that the advantages and features of the present application will be more readily understood by those skilled in the art, thereby more clearly defining the scope of the present application. It should be noted that the present utility model may be implemented in many different forms while satisfying the essential technical features described in the present application, and is not limited to the embodiments described herein.

At present, the heat dissipating device and the power device are generally installed through screw penetration holes to ensure that the power device is in close contact with the heat dissipating piece, but in the fixing mode, a large-area machining bolt hole is needed on the power device, the area occupancy rate is high, and the screw installation position is not beneficial to disassembly and assembly. Meanwhile, the insulation sleeve cannot be arranged to realize reinforced insulation, and the condition of uneven contact exists, so that the heat conduction effect is reduced.

Referring to fig. 1, a schematic structural diagram of a clamping state of a heat dissipation clamping mechanism of a power device according to an embodiment of the present application is shown.

As shown in fig. 1, the heat dissipation clamping mechanism of a power device 4 provided in the embodiment of the present application includes a clamping piece 1, a bolt 2, and a heat dissipation piece 3 that is closely attached to the power device 4; the heat sink 3 includes a mounting platform 31 and heat dissipation fins 32 opposite to the mounting platform 31; the side of the mounting platform 31 facing the heat radiation fins 32 is also provided with a mounting groove 311; the clamping piece 1 comprises a crimping part 12 and an elastic supporting part 13 which are connected through a folding angle 11; the elastic supporting part 13 is arranged in the mounting groove 311 and is propped against the side wall of the mounting groove 311 to support the folded angle 11 to be hung on the side edge of the mounting platform 31; the compression joint part 12 is used for pressing one side of the power device 4 opposite to the heat dissipation element 3; the heat sink fin 32 further comprises a guide hole 321 opposite to the folded angle 11; the plug body 2 penetrates the heat radiation fins 32 through the guide holes 321 and is propped against the folded angle 11.

In some embodiments, the heat dissipation fins 32 include at least two heat dissipation fins 32, and the heat dissipation fins 32 are disposed in parallel and spaced apart from each other, wherein the heat dissipation fins 32 may be made of metal such as aluminum, copper, etc. Because the heat dissipation fins 32 have larger heat dissipation area and heat conductivity, the heat dissipation rate can be improved, and the local accumulation of heat is avoided, so that the power device 4 is heated up drastically, and the product is damaged. It is understood that the number, arrangement and material of the heat dissipation fins 32 are not limited, and those skilled in the art can set the heat dissipation fins according to the heat dissipation requirements.

Further, the heat sink 3 further includes a mounting platform 31, and the mounting platform 31 and the heat sink fins 32 are parallel to each other. The heat dissipation element 3 may be a profile structure formed by injection molding or film pressing, that is, the heat dissipation fins 32 and the mounting platform 31 are integrally formed, so that the connection structure of each component can be further simplified, and the thermal resistance is reduced. For example, in some embodiments, the heat sink fins 32 and the mounting platform 31 extend laterally from one end of the heat sink 3, such that the heat sink 3 is an L-shaped profile structure. Of course, the profile structure can also take other shapes, and the person skilled in the art can vary according to the actual needs.

Specifically, the mounting platform 31 is further provided with a mounting groove 311, and the mounting groove 311 is disposed on a side of the mounting platform 31 facing the heat sink fins 32, and the heat sink fins 32 are matched with the mounting platform 31, so that the clamping member 1 is better fixed by the mounting groove 311. It should be noted that, this holder 1 includes elastic support portion 13 and crimping portion 12 that connect through dog-ear 11, when mounting groove 311 fixed holder 1, elastic support portion 13 of this holder 1 sets up in mounting groove 311 to offset with the lateral wall of mounting groove 311 and press, hang in mounting platform 31 side edge with support dog-ear 11, form the interact through holder 1 and radiator 3 and advance fixedly to holder 1, holder 1 still is in the not hard up movable state this moment, conveniently adjusts or changes holder 1, increases this heat dissipation fixture's adjustability.

Further, the heat dissipation fin 32 further includes a guiding hole 321 capable of matching with the plug 2, and the plug 2 penetrates the heat dissipation fin 32 along the guiding hole 321 and is opposite to the folded corner 11, and is adjusted downward to press the folded corner 11, so that an opening enough to fit into the power device 4 is formed between the press connection portion 12 and the heat dissipation member 3. After the opening is sleeved into the power device 4, the plug body 2 is further adjusted downwards to press the clamping piece 1 to fix the power device 4. The bolt body 2 may be a bolt, and the guiding hole 321 is a screw hole matched with the bolt body 2. Specifically, at least one end of the bolt body 2 is provided with a locking structure, the bolt body 2 can be an inner hexagon screw or a cross screw with a nut, and it can be understood that the specific form of the bolt body 2 is not limited, and the bolt body 2 can be replaced according to the needs of a person skilled in the art. When the bolt body 2 is adjusted upwards, the bolt body 2 is rotated upwards until the clamping structure at the lower end of the bolt body 2 abuts against the radiating fins 32, so that the bolt body 2 is prevented from being adjusted upwards continuously, and the bolt body 2 is prevented from being unscrewed; when the bolt body 2 is adjusted downwards, the bolt body 2 is rotated downwards until the clamping structure at the upper end of the bolt body 2 is propped against the radiating fins 32, so that the bolt body 2 is prevented from being continuously adjusted downwards to prop against the folding angle 11, and the elastic supporting part 13 is prevented from exceeding the deformation range due to excessive adjustment, and the service life of the clamping piece 1 is prevented from being influenced.

In the power control system, the power device 4 may be a MOS transistor or an IGBT, and one side thereof is disposed closely to the heat sink 3, so as to transfer a large amount of heat energy generated by the power device 4 to the heat sink 3 in a heat transfer manner, and accelerate heat dissipation through the heat dissipation fins 32. When the heat dissipation clamping mechanism clamps the power device 4, referring to fig. 1, the pressing portion 12 is pressed against the opposite side of the power device 4 and the heat dissipation member 3, the plug 2 penetrates the heat dissipation fins 32 through the guiding hole 321 and is pressed against the folded angle 11, the folded angle 11 is pressed by the plug 2 for up-down adjustment, and the rigidity force of the plug 2 during fastening is transferred into an elastic pressing force through the clamping member 1, so that the clamping degree and the clamping position of the pressing portion 12 on the heat dissipation fins 32 can be controlled. In some embodiments, a silica gel sleeve may be further disposed on the surface of the power device 4 to enhance the insulation effect.

In some embodiments, the heat dissipation element 3 further includes a positioning structure, which may be a protrusion integrally formed with the heat dissipation element 3 or a carrier connected with the heat dissipation element 3, it is understood that the connection manner and specific structure of the positioning structure and the heat dissipation element 3 are not limited, and those skilled in the art can select according to other needs. Specifically, the positioning structure is arranged at one end of the heat dissipation element 3, which is close to the pin 41 of the power device 4, when the power device 4 is installed, one side of the power device 4 is tightly attached to the heat dissipation element 3, the lower part of the power device 4 is abutted against the positioning structure, so that the positioning of the power device 4 is firmer and more stable, and as can be understood, the positioning structure can be arranged at other positions, and a person skilled in the art can set according to the placement and gravity direction of the power device 4.

From the above, in the heat dissipation clamping mechanism of the power device 4 provided in the embodiment of the present application, the elastic supporting portion 13 is used to fix the clamping member 1 in the mounting groove 311 of the heat dissipation member 3, and the bolt 2 is matched to press against the clamping member, so as to adjust the clamping of the power device 4, and make the disassembly and assembly of the power device 4 more convenient. Meanwhile, the problems of structural damage and poor lamination caused by the core penetrating structure of the power device 4 are avoided.

In addition, compared with the traditional forming mode of integrating the heat dissipation clamping mechanism with the power supply heat dissipation part, the independent integrated heat dissipation clamping mechanism can determine whether to select according to the heat dissipation requirement of the power device of a user, and the heat dissipation clamping mechanism is adopted to enhance heat dissipation or reduce heat dissipation for the power device in the power supply control system according to actual conditions at any time, so that the power supply heat dissipation clamping mechanism is more flexible to use.

Referring to fig. 2, a schematic partial structure diagram of an opened state of a heat dissipation clamping mechanism of a power device 4 according to an embodiment of the present application is shown.

In some embodiments, as shown in fig. 1, the mounting groove 311 is recessed inward near the side wall of the heat dissipation element 3 to form a clamping groove 312, and the bottom of the clamping groove 312 may be square or round, etc., which is not limited to a specific structure, and may be adjusted by those skilled in the art as required. The clamping groove 312 is used for being embedded into one end of the elastic supporting portion 13 connected with the folded angle 11, the clamping groove 312 is used as a fulcrum, and along with downward adjustment of the folded angle 11 of the bolt body 2, the other end of the elastic supporting portion 13 and the side wall of the mounting groove 311, which is far away from the heat dissipation piece 3, are propped against each other to form elastic force, and the elastic force is transferred into pressing force through the clamping piece 1 to press and fix the power device 4. Meanwhile, the clamping piece 1 can be freely separated from the clamping groove 312 and the mounting groove 311 by upwardly adjusting the folding angle 11, so that the radiating clamping mechanism can be conveniently disassembled and maintained.

Further, the clamping groove 312 includes a first guiding surface 313 and a second guiding surface 314, and specifically, the first guiding surface 313 and the second guiding surface 314 are inclined to each other and intersect with the bottom of the clamping groove 312. When the clip 1 is fixed in the mounting groove 311, the end of the elastic support portion 13 connected to the folded corner 11 is fitted into the locking groove 312. Along with the up-down adjustment of the bolt body 2 and the deformation of the elastic supporting portion 13, the first guiding surface 313 can be matched with the folded angle 11, the second guiding surface 314 can be matched with the elastic supporting portion 13, and the opening and closing between the crimping portion 12 and the heat dissipation member 3 are assisted through the guiding action of the first guiding surface 313 and the second guiding surface 314 on the clamping member 1, so that the power device 4 can be conveniently and stably disassembled, assembled and adjusted.

Referring to fig. 3, a schematic structural diagram of a clamping member 1 of a heat dissipation clamping mechanism of a power device 4 according to an embodiment of the present application is shown.

As shown in fig. 3, the clamping member 1 is integrally formed, that is, the compression joint portion 12, the folded corner 11 and the elastic supporting portion 13 are integrally formed, specifically, the clamping member 1 may be an elastic sheet made of metal such as copper and aluminum, and the copper and aluminum have good heat conducting properties, so that heat conduction to the heat dissipation member 3 can be accelerated, and heat dissipation can be accelerated. Meanwhile, as the clamping piece 1 and the heat dissipation piece 3 are both made of metal materials, after the power device 4 is clamped, the chip of the whole power device 4 is in a two-sided shielding state, and the problem of EMI radiation can be improved to a great extent. Because the clip 1 is a spring, the joining condition can be automatically adjusted when the joining surface between the pressure-bonding section 12 and the power device 4 is uneven or has impurities, and when the joining surface needs insulation and an insulating sheet is added. Even the material is aged or the thermal expansion and contraction can automatically restore the joint surface, thereby improving the adaptability of the product.

Further, the side end of the press-connection portion 12 further includes a bent portion 121, and the bent portion 121 is V-shaped or V-shaped, and it is understood that the specific shape of the bent portion 121 is not limited, and those skilled in the art can replace the bent portion as required. Specifically, the bent portion 121 is bent toward a side opposite to the power device 4, the press-connection portion 12 is pressed against the power device 4 through the bent portion 121, and the clamping amount of the power device 4 is more easily adjusted in guiding the bent portion 121 by arranging the bent portion 121.

As can be seen from the above, the heat dissipation clamping mechanism of the power device 4 provided in the embodiments of the present application, the clamping member 1 is an integrally formed elastic metal member, which can adjust the connection condition with the power device 4 and improve the EMI radiation problem. Meanwhile, the bending of the side end of the compression joint part 12 facilitates the clamping amount adjustment of the power device 4 in the guiding direction of the bending position 121.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The embodiments of the present application have been described in detail above with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.

Claims

1. The heat dissipation clamping mechanism of the power device is characterized by comprising a clamping piece, a bolt body and a heat dissipation piece which is tightly attached to the power device;

2. The heat dissipation clamping mechanism of a power device according to claim 1, wherein the mounting groove is recessed inwards near the side wall of the heat dissipation element to form a clamping groove;

3. The heat dissipation clamping mechanism of a power device according to claim 2, wherein the clamping groove comprises a first guide surface and a second guide surface which are obliquely arranged with each other;

4. The heat dissipation clamping mechanism of a power device of claim 1, wherein the clamping member is integrally formed.

5. The heat dissipation clamping mechanism of a power device according to claim 1, wherein the side end of the press-connection part is bent towards the side opposite to the power device to form a bent position;

6. The heat dissipation clamping mechanism of a power device as recited in claim 1, wherein the heat dissipation member further comprises a positioning structure disposed at an end of the heat dissipation member adjacent to the leads of the power device.

7. The heat dissipation clamping mechanism of a power device according to claim 1, wherein at least one end of the plug body is provided with a locking structure.

8. The heat dissipation clamping mechanism of a power device as recited in claim 1, wherein the heat dissipation fins are disposed parallel to the mounting platform.

9. The heat dissipation clamping mechanism of a power device according to claim 1, wherein the heat dissipation fins comprise at least two heat dissipation fins, and the heat dissipation fins are arranged in parallel at intervals.

10. The heat dissipation clamping mechanism of a power device according to any one of claims 1 to 9, wherein the bolt body is a bolt, and the guide hole is a screw hole matched with the bolt body.