Limiting jig for power device assembly and power device assembly limiting assembly

Abstract

A limiting jig for power device assembly and a power device assembly limiting component, comprising: a base, a heat sink limiting block and a power device limiting block fixed in sequence on the base; the base is used for fixing a limiting heat sink, the heat sink limiting block is used for fixing a limiting heat sink, and the power device limiting block is used for fixing a limiting power device. Since the power device, the heat sink and the heat sink are respectively fixed by different limiting structures, the power device can be effectively positioned and the assembly efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of power device assembly of power modules, and more specifically, to a limiting fixture and a power device assembly limiting component for power device assembly. Background Technology

[0002] As the power density of power modules increases, the number of power devices used, especially metal-oxide-semiconductor (MOS) transistors, is also increasing. MOS transistors generate a lot of heat, so heat sinks are usually used to dissipate heat to ensure the power module can operate normally.

[0003] In existing power modules, the MOSFETs are easily misaligned during the assembly process onto the heat sink, which affects subsequent insertion and results in low assembly efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a limiting fixture and a power device assembly limiting component for power device assembly, which can effectively position power devices and has high assembly efficiency, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a limiting fixture for power device assembly, including: a base, a heat sink limiting block and a power device limiting block fixedly arranged on the base in sequence; The base is used to fix and limit the heat sink, the heat sink limiting block is used to fix and limit the heat sink, and the power device limiting block is used to fix and limit the power device.

[0006] In the limiting fixture for assembling power devices according to this utility model, a heat sink limiting groove is provided on the base, a heat sink limiting groove is provided on the heat sink limiting block, and a power device limiting groove is provided on the power device limiting block. The heat sink is fixed in the heat sink limiting groove, the heat sink fin is fixed in the heat sink limiting groove, and the power device is fixed in the power device limiting groove.

[0007] In the limiting fixture for assembling power devices according to this utility model, a heat sink limiting groove is formed on the base; multiple heat sink limiting grooves are formed on the heat sink limiting block; and multiple power device limiting grooves are formed on the power device limiting block. Each heat sink limiting slot is directly opposite a power device limiting slot; a heat sink is fixedly limited in each heat sink limiting slot; a power device is fixedly limited in each power device limiting slot; and a heat sink is fixedly limited in each heat sink limiting slot. All the heat sink limiting slots are projected onto the plane where the base is located, and their projections are all within the projection of the heat dissipation surface of the heat sink onto that plane.

[0008] In the limiting fixture for power device assembly described in this utility model, three heat sink limiting slots are arranged horizontally on the heat sink limiting slot; and a power device limiting slot is respectively provided on the power device limiting block opposite to each heat sink limiting slot.

[0009] In the limiting fixture for assembling power devices according to the present invention, the base includes a horizontal base and a vertical fixing part that extends vertically along a first side of the horizontal base until it is flush with the power device limiting block; the power device limiting block is hinged to the vertical fixing part by a hinge structure.

[0010] In the limiting fixture for assembling power devices according to this utility model, the hinge structure includes a first hinge portion and a second hinge portion, which are respectively disposed on the left and right sides of the vertical fixing portion. In the limiting fixture for assembling power devices according to this utility model, the heat sink limiting groove is formed on the horizontal base; a plurality of fixing holes are formed at the bottom of the heat sink limiting groove for fixing the heat sink.

[0011] The limiting fixture for assembling power devices according to this utility model further includes a first fixing screw, a second fixing screw, and a third fixing screw; the horizontal base, the heat sink limiting block, and the power device limiting block are respectively provided with a first fixing screw hole, a second fixing screw hole, and a third fixing screw hole at positions directly opposite to each other; The horizontal base, the heat sink limiting block, and the power device limiting block are fixed by the first fixing screw, the second fixing screw, the third fixing screw, the first fixing screw hole, the second fixing screw hole, and the third fixing screw hole.

[0012] In the limiting fixture for assembling power devices according to this utility model, the heat sink includes a ceramic heat sink, and the power device includes a MOSFET, an IGBT, and a square inductor.

[0013] The present invention provides a limiting fixture for assembling power devices, comprising a base, a heat sink limiting block, and a power device limiting block sequentially fixed on the base. The base is used to fix and limit the heat sink, the heat sink limiting block is used to fix and limit the heat sink, and the power device limiting block is used to fix and limit the power device. Therefore, the power device, heat sink, and heat sink are respectively limited and fixed by different limiting structures, rather than directly fixing the power device to the heat sink. This effectively positions the power device and achieves high assembly efficiency.

[0014] Another technical solution adopted by this utility model to solve its technical problem is: constructing a power device assembly limiting component, including: a heat sink, multiple power devices, multiple heat sinks, a base, heat sink limiting blocks and power device limiting blocks that are sequentially fixed on the base; A heat sink limiting slot is provided on the base; multiple heat sink limiting slots are provided on the heat sink limiting block; multiple power device limiting slots are provided on the power device limiting block; The heat sink is fixedly positioned in the heat sink limiting slot, and each heat sink limiting slot is directly opposite a power device limiting slot; one heat sink is fixedly positioned in each heat sink limiting slot; one power device is fixedly positioned in each power device limiting slot. All the heat sink limiting slots are projected onto the plane where the base is located, and their projections are all within the projection of the heat sink surface in the plane. The first surface of each heat sink is respectively attached to different areas on the heat sink surface, and the second surface of each heat sink is respectively attached to a power device. The base includes a horizontal base and a vertical fixing part that extends vertically along a first side of the horizontal base until it is flush with the power device limiting block; the power device limiting block is hinged to the vertical fixing part by a hinge structure.

[0015] The power device assembly limiting component of this utility model uses different limiting structures to limit and fix the power device, heat sink, and heat sink, instead of directly fixing the power device to the heat sink. Therefore, it can effectively position the power device and has high assembly efficiency. Furthermore, one heat sink can dissipate heat from multiple power devices, resulting in high heat dissipation efficiency. The power device limiting block is hinged to the vertical fixing part of the base through a hinge structure, which facilitates disassembly and assembly. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is an exploded view of a preferred embodiment of the limiting fixture for assembling power devices according to this utility model; Figure 2 This is a schematic diagram of the assembly structure of a preferred embodiment of the limiting fixture for assembling power devices according to this utility model; Figure 3 This is a schematic diagram of the base of the limiting fixture for assembling power devices according to this utility model; Figure 4 This is a schematic diagram of the heat sink limiting block of the limiting fixture for power device assembly according to this utility model; Figure 5This is a schematic diagram of the power device limiting block of the limiting fixture for power device assembly according to this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Figure 1 This is an exploded view of a preferred embodiment of the limiting fixture for assembling power devices according to this utility model. Figure 2 This is a schematic diagram of the assembly structure of a preferred embodiment of the limiting fixture for assembling power devices according to this utility model. Figure 3 This is a schematic diagram of the base of the limiting fixture for assembling power devices according to this utility model. Figure 4 This is a schematic diagram of the heat sink limiting block of the limiting fixture for power device assembly according to this utility model. Figure 5 This is a schematic diagram of the power device limiting block of the limiting fixture for power device assembly according to this utility model.

[0019] like Figures 1-5 As shown, a limiting fixture for assembling power devices according to this utility model includes: a base 100, a heat sink limiting block 200 and a power device limiting block 300 sequentially fixed on the base 100; the base 100 is used to fix and limit the heat sink, the heat sink limiting block 200 is used to fix and limit the heat sink, and the power device limiting block 300 is used to fix and limit the power device.

[0020] The present invention provides a limiting fixture for assembling power devices, comprising a base, a heat sink limiting block, and a power device limiting block sequentially fixed on the base. The base is used to fix and limit the heat sink, the heat sink limiting block is used to fix and limit the heat sink, and the power device limiting block is used to fix and limit the power device. Therefore, the power device, heat sink, and heat sink are respectively limited and fixed by different limiting structures, rather than directly fixing the power device to the heat sink. This effectively positions the power device and achieves high assembly efficiency.

[0021] Further as Figures 1-5 As shown, a heat sink limiting groove 110 is provided on the base 100, a heat sink limiting groove 220 is provided on the heat sink limiting block 200, and a power device limiting groove 320 is provided on the power device limiting block 300; as shown, the heat sink is fixed in the heat sink limiting groove 110, the heat sink is fixed in the heat sink limiting groove 220, and the power device is fixed in the power device limiting groove 320.

[0022] In one embodiment of this utility model, for a small heat sink, the heat sink, heat fins and power devices can be matched one-to-one, as long as the size and shape of each limiting groove are matched one-to-one with the corresponding device.

[0023] Since heat sinks are typically large while power devices are usually few, a single heat sink is usually used to cool multiple power devices. Therefore, in a preferred embodiment of this invention, a heat sink positioning groove 110 is formed on the base 100. This heat sink positioning groove 110 is rectangular and its shape matches that of a rectangular heat sink. Multiple heat sink positioning grooves 220 are formed on the heat sink positioning block 200; multiple power device positioning grooves 320 are formed on the power device positioning block 300. Each heat sink positioning groove 220 is directly opposite a power device positioning groove 320; each heat sink positioning groove 220 fixes and limits one heat sink; each power device positioning groove 320 fixes and limits one power device; the orthographic projection of all the heat sink positioning grooves 220 onto the plane where the base 100 is located lies within the orthographic projection of the heat dissipation surface of the heat sink onto that plane.

[0024] Since the orthographic projections of all the heat sink limiting slots 220 onto the plane where the base 100 is located are all within the orthographic projections of the heat dissipation surface of the heat sink onto that plane, it can be understood that the heat dissipation surface of the heat sink can cover all the heat sinks, and the first surface of all the heat sinks can be in contact with the heat dissipation surface of the heat sink. Furthermore, since each heat sink limiting slot 220 is directly opposite a power device limiting slot 320, the second surface of each heat sink can be in contact with a power device, thereby dissipating heat for it.

[0025] For example, in the preferred embodiment shown in the figure, three heat sink limiting slots 220 are arranged horizontally on the heat sink limiting slot 220; and a power device limiting slot 320 is respectively provided on the power device limiting block 300 opposite to each heat sink limiting slot 220.

[0026] Further as Figures 1-5 As shown, in a preferred embodiment of this utility model, the base 100 includes a horizontal base 130 and a vertical fixing portion 120 extending vertically along a first side of the horizontal base 130 until it is flush with the power device limiting block 300. The power device limiting block 300 is hinged to the vertical fixing portion 120 via a hinge structure, the hinge structure including a first hinge portion 150 and a second hinge portion 160, which are respectively disposed on the left and right sides of the vertical fixing portion 120. This facilitates the disassembly of the power device limiting block 300.

[0027] The radiator limiting groove 110 is formed on the horizontal base 130; a plurality of fixing holes 111 are formed at the bottom of the radiator limiting groove 110 for fixing the radiator.

[0028] Further as Figures 1-5 As shown, in a preferred embodiment of this utility model, the limiting fixture for assembling power devices further includes a first fixing screw 700, a second fixing screw 700, and a third fixing screw 700; the horizontal base 130, the heat sink limiting block 200, and the power device limiting block 300 are respectively provided with a first fixing screw hole 131, a second fixing screw hole 240, and a third fixing screw hole 340 at positions directly opposite to each other; the horizontal base 130, the heat sink limiting block 200, and the power device limiting block 300 are fixed 340 by the first fixing screw, the second fixing screw, the third fixing screw, the first fixing screw hole 131, the second fixing screw hole 240, and the third fixing screw hole.

[0029] In a preferred embodiment of this utility model, the heat sink includes a ceramic heat sink, and the power device includes a MOSFET, an IGBT, and / or a square inductor.

[0030] This utility model also discloses a power device assembly limiting component, including: a heat sink, multiple power devices, multiple heat sinks, a base 100, and heat sink limiting blocks 200 and power device limiting blocks 300 sequentially fixed on the base 100. A heat sink limiting groove 110 is formed on the base 100. This heat sink limiting groove 110 is a rectangular groove, the shape of which can match a rectangular heat sink. Multiple heat sink limiting grooves 220 are formed on the heat sink limiting blocks 200; multiple power device limiting grooves 320 are formed on the power device limiting blocks 300. Each heat sink limiting groove 220 is directly opposite a power device limiting groove 320; each heat sink limiting groove 220 fixes and limits one heat sink; each power device limiting groove 320 fixes and limits one power device; the orthographic projection of all the heat sink limiting grooves 220 onto the plane where the base 100 is located is within the orthographic projection of the heat dissipation surface of the heat sink onto the plane. The first surface of each heat sink is respectively attached to different areas on the heat dissipation surface of the heat sink, and the second surface of each heat sink is respectively attached to a power device.

[0031] The base 100 includes a horizontal base 130 and a vertical fixing portion 120 extending vertically along a first side of the horizontal base 130 until it is flush with the power device limiting block 300. The power device limiting block 300 is hinged to the vertical fixing portion 120 via a hinge structure, which includes a first hinge portion 150 and a second hinge portion 160, respectively disposed on the left and right sides of the vertical fixing portion 120. This facilitates the disassembly of the power device limiting block 300.

[0032] The limiting fixture and power device assembly limiting component of this utility model, which limit the assembly of power devices, can ensure that the power devices and heat sinks are accurately fixed to the heat sink by using the relative position and the slotted holes in the shape of the heat sink, power devices, and heat sink fins, facilitating subsequent assembly. Furthermore, one heat sink can dissipate heat from multiple power devices, resulting in high heat dissipation efficiency. The power device limiting block is hinged to the vertical fixing part of the base via a hinge structure, thus facilitating disassembly and assembly.

[0033] Although this utility model has been described through specific embodiments, those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or materials without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A limiting fixture for assembling power devices, characterized in that, include: A base, a heat sink limiting block and a power device limiting block that are fixedly mounted on the base in sequence; The base is used to fix and limit the heat sink, the heat sink limiting block is used to fix and limit the heat sink, and the power device limiting block is used to fix and limit the power device.

2. The limiting fixture for assembling power devices according to claim 1, characterized in that, The base has a heat sink limiting groove, the heat sink limiting block has a heat sink limiting groove, and the power device limiting block has a power device limiting groove. The heat sink is fixed in the heat sink limiting groove, the heat sink fin is fixed in the heat sink limiting groove, and the power device is fixed in the power device limiting groove.

3. The limiting fixture for assembling power devices according to claim 1, characterized in that, A heat sink limiting slot is provided on the base; multiple heat sink limiting slots are provided on the heat sink limiting block; multiple power device limiting slots are provided on the power device limiting block; Each heat sink limiting slot is directly opposite a power device limiting slot; a heat sink is fixedly limited in each heat sink limiting slot; a power device is fixedly limited in each power device limiting slot; and a heat sink is fixedly limited in each heat sink limiting slot. All the heat sink limiting slots are projected onto the plane where the base is located, and their projections are all within the projection of the heat dissipation surface of the heat sink onto that plane.

4. The limiting fixture for assembling power devices according to claim 2 or 3, characterized in that, Three heat sink limiting slots are arranged horizontally on the heat sink limiting slot; a power device limiting slot is respectively set on the power device limiting block, directly opposite each heat sink limiting slot.

5. The limiting fixture for assembling power devices according to claim 4, characterized in that, The base includes a horizontal base and a vertical fixing part that extends vertically along a first side of the horizontal base until it is flush with the power device limiting block; the power device limiting block is hinged to the vertical fixing part by a hinge structure.

6. The limiting fixture for assembling power devices according to claim 5, characterized in that, The hinge structure includes a first hinge portion and a second hinge portion, which are respectively disposed on the left and right sides of the vertical fixing portion.

7. The limiting fixture for assembling power devices according to claim 5, characterized in that, The radiator limiting groove is formed on the horizontal base; multiple fixing holes are formed at the bottom of the radiator limiting groove for fixing the radiator.

8. The limiting fixture for assembling power devices according to claim 5, characterized in that, The system further includes a first fixing screw, a second fixing screw, and a third fixing screw; the horizontal base, the heat sink limiting block, and the power device limiting block are respectively provided with a first fixing screw hole, a second fixing screw hole, and a third fixing screw hole at positions directly opposite each other; The horizontal base, the heat sink limiting block, and the power device limiting block are fixed by the first fixing screw, the second fixing screw, the third fixing screw, the first fixing screw hole, the second fixing screw hole, and the third fixing screw hole.

9. The limiting fixture for assembling power devices according to claim 8, characterized in that, The heat sink includes a ceramic heat sink, and the power device includes a MOSFET, an IGBT, and / or a square inductor.

10. A power device assembly limiting component, characterized in that, include: A heat sink, multiple power devices, multiple heat sinks, a base, and heat sink limiting blocks and power device limiting blocks that are sequentially fixed on the base; A heat sink limiting slot is provided on the base; multiple heat sink limiting slots are provided on the heat sink limiting block; multiple power device limiting slots are provided on the power device limiting block; The heat sink is fixedly positioned in the heat sink limiting slot, and each heat sink limiting slot is directly opposite a power device limiting slot; one heat sink is fixedly positioned in each heat sink limiting slot; one power device is fixedly positioned in each power device limiting slot. All the heat sink limiting slots are projected onto the plane where the base is located, and their projections are all within the projection of the heat sink surface in the plane. The first surface of each heat sink is respectively attached to different areas on the heat sink surface, and the second surface of each heat sink is respectively attached to a power device. The base includes a horizontal base and a vertical fixing part that extends vertically along a first side of the horizontal base until it is flush with the power device limiting block; the power device limiting block is hinged to the vertical fixing part by a hinge structure.

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