阅读说明：本技术 场效应管定量封胶控制装置 (Quantitative glue sealing control device for field effect tube ) 是由 刘兴林 何鑫 田飞 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种场效应管定量封胶控制装置,涉及导热硅脂定量控制技术领域,包括筛板,筛板包括网口部,筛板的表面开设有安装孔,筛板上设置有刮除机构,筛板上设置有限位机构,刮除机构包括刮板和梯形块,梯形块固定连接在刮板的表面,限位机构包括连接杆和两个固定杆,两个固定杆均固定连接在筛板的侧面,连接杆的两端分别与两个固定杆的端部固定连接,连接杆的表面套接有限位杆,刮板的表面开设有用于限位杆伸入的凹槽,具备了通过筛板进行涂装导热硅脂,并且通过孔径大小不一的网口部,间接控制导热硅脂挤压后的厚度,保证一致性和均匀性。(The invention discloses a field effect tube quantitative sealing glue control device, which relates to the technical field of heat conduction silicone grease quantitative control and comprises a sieve plate, wherein the sieve plate comprises a mesh opening part, a mounting hole is formed in the surface of the sieve plate, a scraping mechanism is arranged on the sieve plate, a limiting mechanism is arranged on the sieve plate and comprises a scraper and a trapezoidal block, the trapezoidal block is fixedly connected to the surface of the scraper, the limiting mechanism comprises a connecting rod and two fixing rods, the two fixing rods are fixedly connected to the side surface of the sieve plate, the two ends of the connecting rod are respectively and fixedly connected with the end parts of the two fixing rods, the limiting rod is sleeved on the surface of the connecting rod, a groove for the limiting rod to extend into is formed in the surface of the scraper, the heat conduction silicone grease is coated through the sieve plate, the thickness of the extruded heat conduction silicone grease is indirectly controlled through.)

1. The utility model provides a field effect transistor ration is sealed and is glued controlling means, includes sieve (1), its characterized in that: the screen plate (1) comprises a mesh opening part (2), the mesh opening part (2) and the screen plate (1) are integrally arranged, a mounting hole (3) is formed in the surface of the screen plate (1), a scraping mechanism is arranged on the screen plate (1), and a limiting mechanism is arranged on the screen plate (1).

2. The device for controlling quantitative encapsulation of a field effect transistor as claimed in claim 1, wherein: the scraping mechanism comprises a scraping plate (4) and a trapezoidal block (7), the trapezoidal block (7) is fixedly connected to the surface of the scraping plate (4), and a trapezoidal groove (5) used for sliding the trapezoidal block (7) is formed in the surface of the sieve plate (1).

3. The device for controlling quantitative sealing of field effect transistor according to any of claims 1 or 2, wherein: stop gear includes connecting rod (9) and two dead lever (8), two the equal fixed connection of dead lever (8) is in the side of sieve (1), the both ends of connecting rod (9) respectively with two the tip fixed connection of dead lever (8), gag lever post (6) have been cup jointed on the surface of connecting rod (9), the surface of scraper blade (4) is seted up and is used for recess (11) that gag lever post (6) stretched into, be provided with canceling release mechanical system on connecting rod (9).

4. The device for controlling quantitative sealing of field effect transistor according to claim 3, wherein: the reset mechanism comprises two torsion springs (10), the two torsion springs (10) are sleeved on the surface of the connecting rod (9), and two ends of the torsion springs (10) are fixedly connected with the surface of the fixing rod (8) and the surface of the limiting rod (6) respectively.

5. The device for controlling quantitative encapsulation of a field effect transistor as claimed in claim 4, wherein: the number of the limiting mechanisms is two, and the limiting mechanisms are symmetrically distributed.

6. The device for controlling quantitative encapsulation of a field effect transistor as claimed in claim 5, wherein: the aperture of the net opening part (2) is different in size.

Technical Field

The invention relates to the technical field of quantitative control of heat-conducting silicone grease, in particular to a field-effect tube quantitative sealing glue control device.

Background

In a high-power motor driver, an IGBT is generally used as a main power device of an inverter circuit. Because the IGBT has power loss of about 3% -5%, a radiator is required to be used as a heat sink of the IGBT to radiate the IGBT, and the working junction temperature of the IGBT is prevented from not exceeding the maximum limit temperature. In order to reduce the thermal resistance between the IGBT and the heat sink and improve the heat dissipation efficiency, it is generally necessary to coat the substrate of the IGBT with a heat conductive silicone grease. Generally, an artificial coating mode is adopted, so that the heat-conducting silicone grease is easily coated unevenly by the artificial coating, the heat-radiating effect is poor, the heat-conducting silicone grease is difficult to control quantitatively, and the heat-radiating effect has great individual difference.

Disclosure of Invention

The invention aims to provide a field effect tube quantitative sealing control device which is provided with a sieve plate for coating heat-conducting silicone grease, indirectly controls the thickness of the extruded heat-conducting silicone grease through a net opening part with different pore diameters, ensures the consistency and the uniformity, and solves the problems that the heat-conducting silicone grease is not uniformly coated due to manual coating, so that the heat dissipation effect is poor, and the heat-conducting silicone grease is difficult to quantitatively control, so that the heat dissipation effect has larger individual difference.

To achieve the above object, the present invention comprises: the screen plate, the screen plate includes net oral area, net oral area with the screen plate is the integration setting, the mounting hole has been seted up on the surface of screen plate, be provided with on the screen plate and strike off the mechanism, be provided with stop gear on the screen plate.

Preferably, the scraping mechanism comprises a scraping plate and a trapezoidal block, the trapezoidal block is fixedly connected to the surface of the scraping plate, and a trapezoidal groove used for sliding of the trapezoidal block is formed in the surface of the sieve plate.

Preferably, stop gear includes connecting rod and two dead levers, two the equal fixed connection of dead lever is in the side of sieve, the both ends of connecting rod respectively with two the tip fixed connection of dead lever, the gag lever post has been cup jointed on the surface of connecting rod, the surface of scraper blade is offered and is used for the recess that the gag lever post stretched into, be provided with canceling release mechanical system on the connecting rod.

Preferably, the reset mechanism comprises two torsion springs, the two torsion springs are sleeved on the surface of the connecting rod, and two ends of each torsion spring are fixedly connected with the surface of the fixed rod and the surface of the limiting rod respectively.

Preferably, the number of the limiting mechanisms is two, and the limiting mechanisms are symmetrically distributed.

Preferably, the pore size of the mesh part is different.

Compared with the prior art, the invention has the following beneficial effects:

firstly, the screen mesh positioning tool is arranged, so that the effect of controlling coating by the heat-conducting silicone grease in a quantitative manner is achieved.

According to the invention, different apertures of the filling holes on the screen tool are set through different positions of the IGBT substrate from the mounting holes, different positions on the IGBT substrate are different in pre-tightening force of the mounting screws, and different thicknesses of the extruded heat-conducting silicone grease cause different thermal resistances between the IGBT substrate and the radiator, so that different heat-radiating effects are caused, and the different apertures are filled through the heat-conducting silicone grease, so that the thickness of the extruded heat-conducting silicone grease is indirectly controlled, and the consistency and uniformity are ensured.

The scraper is moved, pressure is generated on the limiting rod when the scraper moves, the limiting rod is pressed to rotate, the torsion spring is driven to twist through the rotation of the limiting rod, when the scraper moves to be separated from the limiting rod, the torsion spring is not under pressure, the limiting rod is driven to rotate to the original position under the action of the elastic force of the torsion spring, the scraper continues to move, and the residual heat-conducting silicone grease on the surface of the sieve plate can be scraped when the scraper moves, so that the scraper can be used subsequently.

When the scraper moves to be in contact with the other limiting rod, pressure is generated on the limiting rod, the limiting rod is pressed to rotate, the limiting rod rotates to drive the torsion spring to twist, when the scraper moves to be in contact with the groove, the torsion spring is not under pressure, and at the moment, the limiting rod is driven to extend into the groove under the action of the elastic force of the torsion spring, so that the scraper can be prevented from shaking, and the stability of the structure is improved.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is an enlarged view of the structure A of FIG. 1 according to the present invention;

FIG. 3 is a bottom view of the structure of the present invention;

fig. 4 is a partial side view of the structure of the present invention.

In the figure: 1. a sieve plate; 2. a mesh part; 3. mounting holes; 4. a squeegee; 5. a trapezoidal groove; 6. a limiting rod; 7. a trapezoidal block; 8. fixing the rod; 9. a connecting rod; 10. a torsion spring; 11. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the invention includes a sieve plate 1, the sieve plate 1 includes a mesh opening 2, the mesh opening 2 and the sieve plate 1 are integrally arranged, a mounting hole 3 is arranged on the surface of the sieve plate 1, a scraping mechanism is arranged on the sieve plate 1, a limiting mechanism is arranged on the sieve plate 1, and when in use, the heat-conducting silicone grease can be coated on the surface of the IGBT substrate through the mesh opening 2 arranged on the surface of the sieve plate 1.

Further, strike off the mechanism and include scraper blade 4 and trapezoidal piece 7, trapezoidal piece 7 fixed connection is on the surface of scraper blade 4, and the surface of sieve 1 is offered and is used for the gliding dovetail groove 5 of trapezoidal piece 7, through removing scraper blade 4 when using, drives trapezoidal piece 7 and slides along dovetail groove 5, and scraper blade 4 can strike off the remaining heat conduction silicone grease in sieve 1 surface when removing to sieve 1 subsequent use.

Further, the limiting mechanism comprises a connecting rod 9 and two fixing rods 8, the two fixing rods 8 are fixedly connected to the side surface of the sieve plate 1, two ends of the connecting rod 9 are fixedly connected with the end portions of the two fixing rods 8 respectively, a limiting rod 6 is sleeved on the surface of the connecting rod 9, a groove 11 for the limiting rod 6 to extend into is formed in the surface of the scraper 4, a reset mechanism is arranged on the connecting rod 9, when the scraper is moved in use, pressure is generated on the limiting rod 6, the limiting rod 6 is pressed to rotate, the scraper 4 rotates to be separated from the limiting rod 6 through the limiting rod 6, the limiting rod 6 is driven to recover the original position through the action of the reset mechanism after being separated, when the scraper 4 moves to be in contact with another limiting rod 6, pressure is generated on the limiting rod 6, the limiting rod 6 is pressed to rotate through the action of the reset mechanism, when the scraper moves to be in contact with the groove, drive gag lever post 6 and stretch into in the recess 11, can prevent that scraper blade 4 from taking place to rock, improved the stability of structure.

Further, the reset mechanism comprises two torsion springs 10, the two torsion springs 10 are sleeved on the surface of the connecting rod 9, two ends of the two torsion springs 10 are fixedly connected with the surface of the fixed rod 8 and the surface of the limiting rod 6 respectively, when the scraper moves, pressure is generated on the limiting rod 6, the limiting rod 6 is pressed to rotate, the torsion springs 10 are driven to twist through the rotation of the limiting rod 6, when the scraper 4 moves to be separated from the limiting rod 6, the torsion springs 10 are not under the pressure, at the moment, under the elastic force action of the torsion springs 10, the limiting rod 6 is driven to rotate to the original position, when the scraper 4 moves to be contacted with the other limiting rod 6, pressure is generated on the limiting rod 6, the limiting rod 6 is pressed to rotate, the torsion springs 10 are driven to twist through the rotation of the limiting rod 6, when the limiting rod 6 moves to be contacted with the groove 11, the torsion springs 10 are not under the pressure, at the moment, under the elastic force action, driving the limiting rod 6 to extend into the groove 11.

Furthermore, the number of the limiting mechanisms is two, and the limiting mechanisms are symmetrically distributed, so that the scraper 4 is fixed without repeatedly moving through the limiting mechanisms symmetrically distributed, and the working time is saved.

Further, the aperture size of net gape portion 2 is different, and through different apertures of heat conduction silicone grease filling, the thickness after indirect control heat conduction silicone grease extrudees guarantees uniformity and homogeneity, and heat conduction silicone grease can be remained on the surface of sieve 1 after the application.

The working principle is as follows: when the heat conducting silicone grease is used, the heat conducting silicone grease can be coated on the surface of the IGBT substrate through the mesh opening part 2 formed in the surface of the sieve plate 1, different apertures are filled with the heat conducting silicone grease, the thickness of the extruded heat conducting silicone grease is indirectly controlled, the consistency and the uniformity are ensured, the heat conducting silicone grease can remain on the surface of the sieve plate 1 after coating, if the subsequent use is influenced by not cleaning in time, at the moment, the trapezoidal block 7 is driven to slide along the trapezoidal groove 5 by moving the scraper 4, pressure is generated on the limiting rod 6 when the scraper moves, the limiting rod 6 is pressed to rotate, the torsion spring 10 is driven to twist by rotating the limiting rod 6, when the scraper 4 moves to be separated from the limiting rod 6, the torsion spring 10 is not under the pressure, at the moment, the limiting rod 6 is driven to rotate to the original position under the elastic force of the torsion spring 10, the scraper 4 is continuously moved, and the residual heat conducting silicone grease on the surface of the sieve plate 1 can, so that the subsequent use of sieve 1, scraper blade 4 removes when contacting with another gag lever post 6, to gag lever post 6 generate pressure, press and move gag lever post 6 and rotate, rotate through gag lever post 6, drive torsion spring 10 wrench movement, when removing to gag lever post 6 contact groove 11, torsion spring 10 is not receiving pressure, at this moment under torsion spring 10's elastic force effect, drive gag lever post 6 and stretch into in the groove 11, can prevent that scraper blade 4 from taking place to rock, improved the stability of structure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.