A kind of fixture of power device
Technical field
The utility model relates to the mounting technique of power device, relates in particular to a kind of fixture of power device.
Background technology
In the installation component of existing power tube, according to different installation methods, two kinds of corresponding installation components are arranged: the first is that the installing hole that directly passes metal-oxide-semiconductor with screw is fixed on radiator, but the pin of power tube has the residual of rotation stress after fixing, and the power tube that stress is large is easily breakdown; The second is that 7 font assemblies are being pressed power tube, then passes on the 7 font assemblies of shell place with screw.Consult Fig. 1, represented the second mount scheme in figure.Above technology all needs to use screw locking, complex process, and the production efficiency of assembling is low.First method also may cause power tube breakdown, and the number of components that second method needs is many.
The utility model content
For the deficiencies in the prior art, it is a kind of easy for installation that the utility model provides, and takies the fixture of the little power device of volumetric spaces.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of fixture of power device is provided, comprises radiator, circuit board, spring casting die and at least one power device; Described radiator comprises the first plate and the second plate, and the first plate and the second plate interconnect; Described circuit board is fixed on the first plate at a certain angle; Be fixed with at least one power device on described circuit board, the pin of power device is fixed on circuit board, and described power device is arranged on circuit board, and the body of power device and described the first plate are bonded to each other; Described spring casting die be fixedly clamped body and first plate of power device.
Wherein, described spring casting die is " u " type, on one side it is semi arch or curve.
Wherein, the material of described spring casting die is spring steel.
Wherein, described fixture also comprises dielectric film, and described dielectric film is sealed described power device.
Wherein, the contact-making surface of described dielectric film and radiator is coated with heat conductive silica gel.
Wherein, the contact-making surface of described dielectric film and power device is coated with heat conductive silica gel.
Wherein, described the first plate and mutual vertical connection of the second plate.
Wherein, described circuit board is mutually vertical with the first plate.
Wherein, the lateral wall of described the first plate, the second plate is provided with a plurality of heat radiation scales.
Wherein, described power device comprises metal-oxide-semiconductor and power diode.
The beneficial effects of the utility model are: described spring casting die is fixed on power device on radiator, makes power device, spring casting die and radiator become organic whole, makes that not have rotation stress between power device and radiator residual; Simple and convenient of described process does not need to lock the screw action, can greatly shorten installation time, has improved efficiency of assembling.This spring casting die can one-time fix several power devices, thereby has reduced area occupied, only uses a spring casting die just can realize the technique effect that several briquetting pressings of employing of conventional solution realize.To once assemble and substitute four assemblings, thereby shorten installation time, improve efficient.
Description of drawings
Figure 1 shows that the front view of the power tube of conventional solution;
Figure 2 shows that the front view of fixture of the present utility model;
Figure 3 shows that the lateral plan of fixture of the present utility model.
Label declaration:
The first plate 101 circuit board 102 spring casting die 103 dielectric films 104
Power device 105 radiating fin 106 second plates 107
Embodiment
By describing technology contents of the present utility model, structural feature in detail, being realized purpose and effect, below in conjunction with execution mode and coordinate accompanying drawing to be explained in detail.
See also Fig. 2 and Fig. 3, the fixture of the power device of present embodiment comprises radiator, circuit board 102, spring casting die 103; Described radiator comprises that the first plate 101 and the second plate 107, the first plates 101 and the second plate 107 interconnect; Described circuit board 102 is fixed on the first plate 101 at a certain angle; Be fixed with at least one power device 105 on described circuit board 102, the pin of power device is fixed on circuit board, and power device 105 is arranged on circuit board 102, and the body of power device 105 and described the first plate 101 are bonded to each other; Described spring casting die 103 be fixedly clamped body and first plate 101 of power device 105.
Present embodiment adopts special-purpose radiator, and the first plate 101 of described radiator is connected at a certain angle with the second plate 107, preferably can will both vertically connect.Described circuit board 102 vertically is fixed on the first plate 101, circuit board 102 is placed in the first plate 101 and the second plate 107 formed " L " type space, thereby can be easily the pin of power device 105 be fixed on circuit board 102, and make the body of power device 105 and described the first plate 101 bonded to each other.In present embodiment, described power device 105 is arranged on circuit board 102, can form a linear compact arranged structure.Thereby only need adopt a spring casting die 103 that power device 105 and the first plate 101 is closely fixing.Wherein, described power device 105 comprises metal-oxide-semiconductor and power diode, and the structure of these two kinds of devices can make its device body fit on the first plate 101.
Consult shown in Figure 3ly, the improvement of above-mentioned execution mode has, and described spring casting die 103 is " u " type, on one side it is semi arch or curve.The shape of described semi arch makes this spring casting die 103 can the pressing different-thickness, compresses better effects if, and range of application is more extensive.The material of described spring casting die 103 is spring steel, spring steel has good combination property, comprise mechanical property, elasticity attenuation resistance energy, fatigue behaviour, have good metallurgical quality, good surface quality, accurate profile and size, therefore more can satisfy the needs of spring casting die 103 designs of the present utility model.
For radiator and power device 105 insulation are left, the further improvement of above-mentioned execution mode has, and described fixture also comprises dielectric film 104, and described dielectric film 104 is sealed described power device 105.With power device 105 and radiator, 103 isolation of spring casting die, reach the purpose of insulation.
In order to strengthen the radiating effect of this power device 105 fixtures, described dielectric film 104 is coated with heat conductive silica gel with the contact-making surface of radiator.Preferably, described dielectric film 104 is coated with heat conductive silica gel with the contact-making surface of power device 105.Thereby make the heat that power device 105 bodies produce easierly to pass to described radiator by described dielectric film 104, greatly the enhancing radiating effect of degree.The improvement of present embodiment has, and the lateral wall of described the first plate 101, the second plate 107 is provided with a plurality of heat radiation scales.By increasing radiating fin 106, increase area of dissipation, thereby can further strengthen radiating effect.
The above is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.