Low-temperature device for testing power device

Abstract

The utility model relates to the technical field of low-temperature testing devices, and discloses a low-temperature testing device for a power device, which comprises a supporting leg, a low-temperature mechanism is arranged at the top of the supporting leg, and a fixed pop-up mechanism is arranged in the low-temperature mechanism. According to the low-temperature testing device for the power device, through the arranged fixed ejection mechanism, in the using process, by means of transmission of a threaded screwing rod, a cold conduction pressing block can be driven to move downwards, the function of fixing a chip of the power device is achieved, by means of a spring telescopic rod, the situation that the chip is damaged due to large fixing force can be prevented, and through the arrangement of scale marks, the chip is not damaged; according to the power device chip taking-out device, the fixing strength can be adjusted according to needs, a first spring and a second spring are utilized, the placing box can be fixed or popped out in an auxiliary mode through the action of the springs, frostbite caused by the fact that a user needs to put the hand into the lower shell and the upper cover is avoided, and meanwhile the convenience of taking out a chip of a power device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test low temperature device technical field, concretely is a kind of power device test low temperature device. BACKGROUND

[0002] Power device is carried out power processing, with the semiconductor device of processing high voltage, large current ability, power device in production, usually need to test the chip element in its interior, test chip working in low temperature environment, whether the requirement of passing low temperature test, thus need to use test low temperature device.

[0003] According to the power device test low temperature device (grant announcement number: CN 219609140U) described in the patent network "the utility model relates to test device technical field, and discloses a kind of power device test low temperature device, including test device, the inner wall of the test device is provided with clamping mechanism, the clamping mechanism includes: refrigeration assembly one, leans on piece, bolt, refrigeration assembly two, spring one, clamping block, the inner wall of the refrigeration assembly two is provided with prevent over-clamping mechanism, the prevent over-clamping mechanism includes: spring two, the inner wall of the refrigeration assembly two and the one end of spring two are fixed.The power device test low temperature device, by setting prevent over-clamping mechanism, when the top of clamping block and the inner wall of refrigeration assembly two resist, clamping block resist extrusion block, extrusion block moves up extrusion spring two, pull rope loosens, spring three drives pawl to move in the direction of dentate groove and is engaged, at this moment, pawl and dentate groove are engaged, refrigeration assembly two cannot continue to move downward, prevent the effect of damaging chip by excessive clamping force".

[0004] For the above description, the applicant believes that the following problems exist:

[0005] The utility model in use process, by setting prevent over-clamping mechanism, utilize the cooperation of pawl and dentate groove, can prevent clamping force too large damage chip, but in actual use, since the chip of power device is in sealed shell interior and carries out low temperature test, and the temperature of low temperature test is usually low, when ending test and taking out chip, need to put hand into the interior of sealed shell, like this, it can cause hand to be frozen, thus needs to improve a kind of power device test low temperature device to solve the above problems. Utility model content

[0006] The utility model aims at providing a kind of power device test low temperature device to solve the problems raised in the above background art.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of power device test low temperature device, including support leg, the top of the support leg is provided with low temperature mechanism, the inside of the low temperature mechanism is provided with fixed pop-up mechanism.

[0008] The fixed pop-up mechanism comprises a pressing component and a cartridge component, and the cartridge component is arranged at the bottom of the pressing component.

[0009] Preferably, the low-temperature mechanism comprises a lower shell, a top cover, a front cover plate, a drying device, a left side of the top cover, a gas delivery pipe, a refrigeration device, a circulating pipe, a back of the circulating pipe, a cold-lead pressing block, a cold water circulating device, and the lower shell is fixedly installed at the top of the supporting leg, the top of the lower shell is fixedly installed with the top cover, the front surface of the top cover is rotatably installed with the front cover plate, the back of the front cover plate is fixedly installed with the drying device, the left side of the top cover is fixedly installed with the gas delivery pipe, the left side of the gas delivery pipe is provided with the refrigeration device, the inside of the top cover is fixedly installed with the circulating pipe, the back of the circulating pipe is fixedly installed with the cold-lead pressing block, and the end of the circulating pipe away from the cold-lead pressing block is fixedly installed with the cold water circulating device, so as to facilitate the low-temperature test on the chip of the power device through the low-temperature mechanism.

[0010] Preferably, holes are formed at the corresponding positions of the top cover and the circulating pipe, and the circulating pipe is fixedly installed inside the hole formed in the inside of the top cover, so as to facilitate the cold water delivery under normal conditions.

[0011] Preferably, the pressing component comprises a threaded screw rod, the threaded screw rod is screwedly installed in the inside of the top cover, the bottom of the threaded screw rod is rotatably installed with a driving plate, the top of the driving plate is fixedly installed with a limiting rod, the bottom of the driving plate is fixedly installed with a spring telescopic rod, the top of the cold-lead pressing block is fixedly installed with an auxiliary positioning rod, and the outside of the auxiliary positioning rod is provided with scale marks, so as to facilitate the fixation of the chip of the power device through the pressing component.

[0012] Preferably, holes are formed at the corresponding positions of the top cover, the limiting rod and the auxiliary positioning rod, and the limiting rod and the auxiliary positioning rod are slidingly installed inside the holes formed in the inside of the top cover, so as to improve the stability.

[0013] Preferably, the cartridge component comprises a placing box, the placing box is slidingly installed in the inside of the lower shell, the bottom of the placing box is fixedly installed with a connecting plate, the back of the connecting plate is fixedly installed with a spring one, a rotating clasp is rotatably installed in the inside of the lower shell, a spring two is fixedly installed in the inside of the rotating clasp, and the bottom inner side of the placing box is fixedly installed with a backing plate, so as to facilitate the pop-up of the placing box through the cartridge component.

[0014] Preferably, the end of the spring two away from the rotating clasp is fixedly installed with the bottom inner side of the lower shell, grooves are formed at the corresponding positions of the lower shell and the connecting plate, the connecting plate is slidingly installed inside the groove formed in the inside of the lower shell, the end of the spring one away from the connecting plate is fixedly installed inside the groove formed in the inside of the lower shell, and a clamping groove is formed in the inside of the placing box, and the clamping groove formed in the inside of the placing box is clamped with the rotating clasp, so as to facilitate the fixation of the placing box under normal conditions.

[0015] Compared with the prior art, the power device test low-temperature device has the following beneficial effects:

[0016] 1. The power device test low-temperature device, by setting the fixed pop-up mechanism, in the use process, the transmission of the threaded rod can drive the cold guide block downward, the function of fixing the chip of the power device, the spring telescopic rod can prevent the fixed force from damaging the chip, the setting of the scale mark can adjust the fixed force according to the need, the spring one and the spring two can be set, the spring can be fixed or assisted to pop up, avoid the user needs to put the hand into the inside of the lower shell and the upper cover, and the convenience of taking out the chip of the power device is improved.

[0017] 2. The power device test low-temperature device, by setting the low-temperature mechanism, in the use process, the refrigeration device can generate low-temperature to the inside of the lower shell and the upper cover, the cold water circulating device can make the low-temperature water in the cold guide block circulate, the drying device can adsorb the moisture in the inside of the lower shell and the upper cover, and the function of testing the low-temperature of the power device is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment description, obviously, the drawings in the following description is only some embodiments of the utility model, for the ordinary skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings:

[0019] Figure 1 It is the appearance structure schematic diagram of the utility model;

[0020] Figure 2 It is the appearance structure schematic diagram of the utility model fixed pop-up mechanism;

[0021] Figure 3 It is the appearance structure schematic diagram of the utility model pressure material assembly;

[0022] Figure 4 It is the appearance structure schematic diagram of the utility model cartridge assembly section view;

[0023] Figure 5 It is the appearance structure schematic diagram of the utility model low-temperature mechanism section view.

[0024] In the figure: 1, support leg; 2, low temperature mechanism; 21, lower shell; 22, upper cover; 23, front cover plate; 24, drying device; 25, gas conveying pipe; 26, refrigeration device; 27, circulating pipe; 28, cold conducting block; 29, cold water circulating device; 3, fixed ejection mechanism; 31, pressing component; 311, threaded rod; 312, driving plate; 313, limiting rod; 314, spring telescopic rod; 315, auxiliary positioning rod; 316, scale mark; 32, cartridge assembly; 321, placing box; 322, connecting plate; 323, spring one; 324, rotating hook; 325, spring two; 326, backing plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] In the present application, unless explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] Embodiment one:

[0028] Please refer to Figures 1-4 The present application provides a technical solution: a power device test low temperature device, comprising a support leg 1, the top of the support leg 1 is provided with a low temperature mechanism 2, the inside of the low temperature mechanism 2 is provided with a fixed ejection mechanism 3.

[0029] The fixed ejection mechanism 3 comprises a pressing component 31 and a cartridge assembly 32, and the cartridge assembly 32 is arranged at the bottom of the pressing component 31.

[0030] Further, the pressing assembly 31 comprises a threaded rod 311 which is screwed in the inside of the upper cover 22, the bottom of the threaded rod 311 is rotatably installed with a driving plate 312, the top of the driving plate 312 is fixedly installed with a limiting rod 313, the bottom of the driving plate 312 is fixedly installed with a spring telescopic rod 314, the top of the cold-lead pressing block 28 is fixedly installed with an auxiliary positioning rod 315, the outside of the auxiliary positioning rod 315 is provided with a scale mark 316, so as to facilitate the fixation of the chip of the power device through the pressing assembly 31.

[0031] Further, the upper cover 22 is provided with a hole at the corresponding position of the limiting rod 313 and the auxiliary positioning rod 315, and the limiting rod 313 and the auxiliary positioning rod 315 are slidably installed in the hole in the inside of the upper cover 22, thereby improving the stability.

[0032] Further, the spring box assembly 32 comprises a placing box 321 which is slidably installed in the inside of the lower shell 21, the bottom of the placing box 321 is fixedly installed with a connecting plate 322, the back of the connecting plate 322 is fixedly installed with a spring one 323, the inside of the lower shell 21 is rotatably installed with a rotating clasp 324, the inside of the rotating clasp 324 is fixedly installed with a spring two 325, the bottom of the inside of the placing box 321 is fixedly installed with a backing plate 326, so as to facilitate the ejection of the placing box 321 through the spring box assembly 32.

[0033] Further, the end of the spring two 325 away from the rotating clasp 324 is fixedly installed with the bottom of the inside of the lower shell 21, the lower shell 21 is provided with a groove at the corresponding position of the connecting plate 322, and the connecting plate 322 is slidably installed in the groove in the inside of the lower shell 21, the end of the spring one 323 away from the connecting plate 322 is fixedly installed in the groove in the inside of the lower shell 21, the inside of the placing box 321 is provided with a clamping groove, and the clamping groove in the inside of the placing box 321 is clamped with the rotating clasp 324, so as to facilitate the fixation of the placing box 321 in the normal state.

[0034] Embodiment two:

[0035] Please refer to Figure 5 , and in combination with embodiment one, it is further obtained that the low-temperature mechanism 2 comprises a lower shell 21 which is fixedly installed at the top of the supporting leg 1, the top of the lower shell 21 is fixedly installed with an upper cover 22, the front of the upper cover 22 is rotatably installed with a front cover plate 23, the back of the front cover plate 23 is fixedly installed with a drying device 24, the left side of the upper cover 22 is fixedly installed with a gas conveying pipe 25, the left side of the gas conveying pipe 25 is provided with a refrigeration device 26, the inside of the upper cover 22 is fixedly installed with a circulating pipe 27, the back of the circulating pipe 27 is fixedly installed with a cold-lead pressing block 28, the end of the circulating pipe 27 away from the cold-lead pressing block 28 is fixedly installed with a cold water circulating device 29, so as to facilitate the low-temperature test of the chip of the power device through the low-temperature mechanism 2.

[0036] Further, the upper cover 22 is provided with a hole at the corresponding position of the circulation pipe 27, and the circulation pipe 27 is fixedly installed in the hole of the upper cover 22, so as to facilitate the delivery of cold water in the normal state.

[0037] In actual operation, when the device is used, the rotating clamping hook 324 is rotated to move away from the inside of the clamping groove in the placement box 321, and under the action of the spring one 323, the connecting plate 322 drives the placement box 321 to pop out. At this time, the chip of the power device is placed on the top of the pad plate 326, and the placement box 321 is pushed. Under the action of the spring two 325, the rotating clamping hook 324 contacts the clamping groove, and then clamps the placement box 321 so that it cannot move. At this time, the threaded rod 311 is rotated, and under the limitation of the limiting rod 313, the plate 312 drives the spring telescopic rod 314 to move downward, and the cold-lead pressing block 28 is driven by the spring telescopic rod 314 to move downward and press the chip. At this time, the cold-lead pressing block 28 is moved downward, and the spring telescopic rod 314 is shortened, and the auxiliary positioning rod 315 is moved upward. According to the scale of the scale mark 316, after selecting a fixed force, the low-temperature test can be started. The refrigeration device 26 is used to make cold air enter the inside of the lower shell 21 and the upper cover 22, and the cold-lead pressing block 28 is used to deliver cold water, which circulates in the inside of the cold-lead pressing block 28. The drying device 24 can absorb moisture. After the test is completed, the rotating clamping hook 324 is rotated to compress the spring two 325, and the spring one 323 is used to pop out the placement box 321 to take out the chip.

[0038] It should be noted that, in the present document, the terms“first”,“second”, etc. are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual such relationship or order between such entities or operations. Also, the terms“comprises”,“comprising”, or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by“comprises a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element(s).

Claims

1. A low temperature device for testing power devices comprising support legs (1), characterized in that: The top of the support leg (1) is provided with a low-temperature mechanism (2), and the inside of the low-temperature mechanism (2) is provided with a fixed ejection mechanism (3); The fixed ejection mechanism (3) comprises a pressing component (31) and a cartridge component (32), and the cartridge component (32) is arranged at the bottom of the pressing component (31).

2. The low temperature device for testing power devices of claim 1, wherein: The low-temperature mechanism (2) comprises a lower shell (21), the lower shell (21) is fixedly installed at the top of the support leg (1), the top of the lower shell (21) is fixedly installed with an upper cover (22), the front surface of the upper cover (22) is rotatably installed with a front cover plate (23), the back of the front cover plate (23) is fixedly installed with a drying device (24), the left side of the upper cover (22) is fixedly installed with a gas conveying pipe (25), the left side of the gas conveying pipe (25) is provided with a refrigeration device (26), the inside of the upper cover (22) is fixedly installed with a circulating pipe (27), the back of the circulating pipe (27) is fixedly installed with a cold conduction pressing block (28), and the end of the circulating pipe (27) away from the cold conduction pressing block (28) is fixedly installed with a cold water circulating device (29).

3. The low temperature device for testing power devices of claim 2, wherein: Corresponding positions of the upper cover (22) and the circulating pipe (27) are provided with holes, and the circulating pipe (27) is fixedly installed in the holes in the inside of the upper cover (22).

4. The low temperature device for testing power devices of claim 2, wherein: The pressing component (31) comprises a threaded rod (311), the threaded rod (311) is threadedly installed in the inside of the upper cover (22), the bottom of the threaded rod (311) is rotatably installed with a driving plate (312), the top of the driving plate (312) is fixedly installed with a limiting rod (313), the bottom of the driving plate (312) is fixedly installed with a spring telescopic rod (314), the top of the cold conduction pressing block (28) is fixedly installed with an auxiliary positioning rod (315), and the outside of the auxiliary positioning rod (315) is provided with a scale mark (316).

5. A low temperature apparatus for testing power devices as recited in claim 4, wherein: Corresponding positions of the upper cover (22), the limiting rod (313) and the auxiliary positioning rod (315) are provided with holes, and the limiting rod (313) and the auxiliary positioning rod (315) are slidably installed in the holes in the inside of the upper cover (22).

6. The low temperature device for testing power devices of claim 2, wherein: The cartridge component (32) comprises a placing box (321), the placing box (321) is slidably installed in the inside of the lower shell (21), the bottom of the placing box (321) is fixedly installed with a connecting plate (322), the back of the connecting plate (322) is fixedly installed with a spring one (323), the inside of the lower shell (21) is rotatably installed with a rotating clasp (324), the inside of the rotating clasp (324) is fixedly installed with a spring two (325), and the bottom of the placing box (321) is fixedly installed with a pad (326).

7. A low temperature apparatus for testing power devices as recited in claim 6, wherein: The spring two (325) is fixedly installed at the bottom inner side of the lower shell (21) away from one end of the rotating hook (324), the lower shell (21) is provided with a groove at the corresponding position of the connecting plate (322), the connecting plate (322) is slidingly installed in the groove in the lower shell (21), the spring one (323) is fixedly installed in the groove in the lower shell (21) away from one end of the connecting plate (322), and the placing box (321) is provided with a clamping groove in the inside, and the clamping groove in the placing box (321) is clamped with the rotating hook (324).

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