CN203368296U - Mounting structure for power tube of switching power supply - Google Patents
Mounting structure for power tube of switching power supply Download PDFInfo
- Publication number
- CN203368296U CN203368296U CN 201320425375 CN201320425375U CN203368296U CN 203368296 U CN203368296 U CN 203368296U CN 201320425375 CN201320425375 CN 201320425375 CN 201320425375 U CN201320425375 U CN 201320425375U CN 203368296 U CN203368296 U CN 203368296U
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- CN
- China
- Prior art keywords
- power tube
- mounting structure
- radiator
- power
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a mounting structure for power tubes of a switching power supply. The mounting structure comprises a housing, a PCB and two sets of power tube assemblies, wherein the power tube assemblies comprise power tubes fixed on the front sides of radiators and the radiators, the lower ends of pins of the power tubes are bent towards the radiator, the housing comprises two opposite sidewalls, the radiators of the two sets of power tube assemblies are respectively fixed on the inner surfaces of the two opposite sidewalls, and the pins of the power tubes and fixing pins of the radiators are respectively welded in jacks in the PCB. The mounting structure prevents pin stress of power tubes and relative shear stress of radiators due to structural tolerance and assembly tolerance, and improves heat radiation property of the power tubes and fixing reliability.
Description
[technical field]
The utility model relates to Switching Power Supply, relates in particular to a kind of switch power supply power tube mounting structure.
[background technology]
The driving of using in power supply product or the power tube of rectification (metal-oxide-semiconductor or diode, here be commonly referred to as power tube) usually need to be attached on casing inner wall and be dispelled the heat, some power tubes because of two sides that need to often be installed on the U-shaped housing of function module design ' as shown in Figure 1, usually the power tube heat sink conception adopted is in two sides of U-shaped housing 1, to utilize radiator 2 first to assemble power tube 3(power tube 3 can adopt screw fastening toward assembling on radiator 2, adhesive film is bonding, bonding or other mounting meanss of bonded adhesives) after, again the pin of the fixing feet of radiator 2 and power tube 3 is welded to respectively on pcb board 8, form the PCB assembly, finally the PCB assembled is arrived in U-shaped housing 1, with radiator hold-down screw 5, radiator is fixed on the sidewall 101 of U-shaped housing 1.
This traditional power tube installation structure is because the width of U-shaped housing sidewall inside is slightly wider than the distance between two radiator installed surfaces, usually leave gap between the two, so that the installation of PCB assembly, simultaneously because there is the build-up tolerance of allowance for finish, power tube and PCB, these tolerances and gap required power pipe 3 pins make up by distortion, power tube pin so long-term work, under the effect of larger stress, easily produce the risk fractureed; The risk that also can bring power tube to come off for bonding power tube, cause the power tube failure.
In order to address the above problem, as shown in Figures 2 and 3, the common way of industry is that the pin of power tube 301 is curved to overhanging Z-shaped or lengthening, and these methods only can reduce the part stress of power tube pin, can not eliminate the risk of the excessive generation of power tube pin stress.
[summary of the invention]
The part stress that the technical problems to be solved in the utility model is to provide a kind of power tube pin is little, the high switch power supply power tube mounting structure of power tube heat radiation reliability.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of switch power supply power tube mounting structure, comprise housing, pcb board and two group power assemblies, the power tube assembly comprises power tube and radiator, power tube is fixed on the front of radiator, and the lower end of power tube pin is to the bending of radiator direction; Housing comprises two relative sidewalls, and two group power assembly radiating devices are separately fixed at the inner surface of two opposing sidewalls, and the pin of power tube and the fixing feet of radiator are welded on respectively in the jack of pcb board.
Above-described switch power supply power tube mounting structure, the pin of power tube bends to zigzag.
Above-described switch power supply power tube mounting structure, on pcb board, the fixing feet jack of the pin jack of power tube and radiator is arranged on same straight line.
Above-described switch power supply power tube mounting structure, described housing comprises base plate, two relative sidewalls of described base plate and housing form the housing of U font.
Above-described switch power supply power tube mounting structure, described pcb board is fixed on base plate by the support column on base plate.
The utility model switch power supply power tube mounting structure has been avoided poor the pulling the pin stress that causes power tube and, to the relative shear stress of radiator, improved power tube heat radiation and fixing reliability of structure tolerance and assembler.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the front view of prior art switch power supply power tube mounting structure.
Fig. 2 is the outline drawing that prior art switch power supply power tube mounting structure power tube pin lengthens.
Fig. 3 is the outline drawing that prior art switch power supply power tube mounting structure power tube pin curves zigzag outward.
Fig. 4 is the front view of the utility model embodiment switch power supply power tube mounting structure.
Fig. 5 curves the outline drawing of zigzag in the utility model embodiment switch power supply power tube mounting structure.
Fig. 6 is A in Fig. 4 partial view to pcb board.
[embodiment]
The utility model embodiment switch power supply power tube mounting structure as shown in Figures 4 to 6, comprises housing 1, pcb board 8 and two group power assemblies.
As shown in Figure 4, housing 1 comprises base plate 102 and two relative sidewalls 101, and the sidewall 101 that base plate 102 is relative with two forms the housing 1 of U font.Pcb board 8 is fixed on housing 1 by the support column 103 on base plate 102.
The power tube assembly comprises power tube 3(MOS pipe or diode, is referred to as power tube) and radiator 2, power tube 3 is screwed the front of radiator 2; The radiator 2 of two group power 3 assemblies is fixed on respectively the inner surface of two opposing sidewalls 101 with screw 5, the pin 301 of power tube 3 and the fixing feet 201 of radiator 2 are welded on respectively in the jack of pcb board 8.
As shown in Figure 4 and Figure 5, the lower end of power tube pin 301 bends to zigzag to the direction of radiator 2.
As shown in Figure 4 and Figure 6, on pcb board 8, the pin jack 801 of power tube 3 is arranged on same straight line with the fixing feet jack 802 of radiator 2.
The pcb board 8 of the above embodiment of the utility model is arranged the pin jack of the fixing feet of radiator 2 802 jacks and power tube 3 801 point-blank, power tube 3 by special-purpose mould in advance by Z-shaped in 301 dozens of pins, be assembled on radiator 2, PC assembly B after wave soldering is assembled in U-shaped housing 1, and radiator 2 is assembled in U-shaped housing 1 by outside hold-down screw 5.Because the pad of the pin 301 of the pad of the fixing feet 201 of radiator 2 and power tube 3 is arranged point-blank, can on the plate face at PCB 8, produce a torsional deflection when the structure interval that compensates U-shaped housing and machining tolerance and build-up tolerance, offset the stress and the shear stress that produce.Avoid poor the pulling the pin stress that causes power tube and, to the relative shear stress of radiator, improved heat conduction and fixing reliability of structure tolerance and assembler.
Claims (5)
1. a switch power supply power tube mounting structure, comprise housing, pcb board and two group power assemblies, and the power tube assembly comprises power tube and radiator, and power tube is fixed on the front of radiator; Housing comprises two relative sidewalls, two group power assembly radiating devices are separately fixed at the inner surface of two opposing sidewalls, the pin of power tube and the fixing feet of radiator are welded on respectively in the jack of pcb board, it is characterized in that, the lower end of power tube pin is to the bending of radiator direction.
2. switch power supply power tube mounting structure according to claim 1, is characterized in that, the pin of power tube bends to zigzag.
3. switch power supply power tube mounting structure according to claim 1, is characterized in that, on pcb board, the fixing feet jack of the pin jack of power tube and radiator is arranged on same straight line.
4. switch power supply power tube mounting structure according to claim 1, is characterized in that, described housing comprises base plate, and two relative sidewalls of described base plate and housing form the housing of U font.
5. switch power supply power tube mounting structure according to claim 4, is characterized in that, described pcb board is fixed on base plate by the support column on base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320425375 CN203368296U (en) | 2013-07-17 | 2013-07-17 | Mounting structure for power tube of switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320425375 CN203368296U (en) | 2013-07-17 | 2013-07-17 | Mounting structure for power tube of switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368296U true CN203368296U (en) | 2013-12-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320425375 Expired - Fee Related CN203368296U (en) | 2013-07-17 | 2013-07-17 | Mounting structure for power tube of switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417239A (en) * | 2019-08-13 | 2019-11-05 | 合肥通用电源设备有限公司 | Switching Power Supply power tube installation structure |
-
2013
- 2013-07-17 CN CN 201320425375 patent/CN203368296U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417239A (en) * | 2019-08-13 | 2019-11-05 | 合肥通用电源设备有限公司 | Switching Power Supply power tube installation structure |
| CN110417239B (en) * | 2019-08-13 | 2021-02-02 | 合肥通用电源设备有限公司 | Power tube mounting structure for switch power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |