Pressure control clamp
By designing a pressure-controlled fixture, the problem of insufficient pressure control in transient thermal resistance testing was solved, the stability and consistency of the test data were achieved, and the test dispersion was reduced.
Patent Information
- Application Number
- CN202422577654.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-24
AI Technical Summary
At present, the transient thermal resistance test lacks pressure control equipment, resulting in large dispersion of test results and the inability to guarantee consistency of test results between engineers.
A pressure control fixture was designed, which included a base, a cold plate, a bracket, a slider, a slide rod, a limit block, a ring weight and an insulated pressure head. The precise pressure control of the sample under test was achieved through the cooperation of the slider and the locking handle.
It achieves fast clamping and simple operation, reduces the dispersion of test data, and the difference in test data between different operators is less than 1%, and comes with specific pressure information.
Smart Images
Figure CN223377357U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pressure control fixture, in particular to a transient thermal resistance test fixture for single-tube power electronic components, belonging to the technical field of semiconductor testing and aging equipment. Background Art
[0002] With the development of the semiconductor industry, the demand for power semiconductors is becoming increasingly strong, and the corresponding demand for various power semiconductor tests is also becoming increasingly strong. In the testing of single-tube electronic components, especially the transient thermal resistance testing industry, it is necessary to clarify the conditions for obtaining test results based on the test requirements to ensure the engineering application value of the test results. However, at this stage, there is no clear pressure control equipment in the transient thermal resistance testing process, resulting in large fluctuations in transient thermal resistance measurements, and the consistency of test results between different engineers cannot be guaranteed.
[0003] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content
[0004] In view of the deficiencies in the background technology, the utility model provides a pressure control fixture which can be quickly clamped, is easy to operate, and can effectively solve the pressure control problem in the transient thermal resistance test process and reduce measurement dispersion.
[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0006] A pressure control fixture includes a base, a cold plate and a bracket arranged in the vertical direction are installed above the base; a slider is installed on the main body of the bracket, and a sliding rod arranged in the vertical direction is slidably installed on the side of the slider away from the bracket; a limit block is installed on the sliding rod, the limit block is located above the slider, and an annular weight is placed above the limit block, and the annular weight is sleeved on the main body of the sliding rod; an insulating pressure head fixedly connected to the sliding rod is installed at the bottom of the sliding rod.
[0007] Furthermore, the slider is provided with a locking handle, by which the slider can be locked at a height position along the bracket.
[0008] Furthermore, the connection position between the limit block and the slide rod is adjustable.
[0009] Furthermore, the cold plate and the base, and the bracket and the base are all fixedly connected by bolts.
[0010] Furthermore, the base is a U-shaped structure, and the cold plate is located above the inner cavity of the U-shaped structure of the base.
[0011] Furthermore, adjustable supporting feet are installed on the bottom of the base.
[0012] Furthermore, two linear bearings are embedded in the slider, and the bracket and the slide rod are respectively inserted into the linear bearings.
[0013] Compared with the prior art, the present invention has the following advantages after adopting the above technical solution:
[0014] In the present invention, the annular weight is pressed on the limit block by gravity. The limit block, the slide bar and the adiabatic pressure head are completely fixed. Then, the weight of the annular weight acts as a downward force to press on the sample to be tested. The pressure on the sample to be tested is the sum of the weights of the annular weight, the limit block, the slide bar and the adiabatic pressure head.
[0015] The utility model can be quickly clamped, is easy to operate, and effectively solves the pressure control problem in the transient thermal resistance test process. After actual use, when the pressure control fixture is not used, the test data dispersion is about 5%, and the difference between different operators is large. After using the pressure control fixture, the test data dispersion between different operators is within 1%, the difference is small, and the test data can be accompanied by specific pressure information.
[0016] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural stereogram of the utility model;
[0018] Figure 2 It is a structural side view of the present utility model.
[0019] In the figure, 1-base, 2-cold plate, 3-bracket, 4-slider, 5-sliding rod, 6-limiting block, 7-annular weight, 8-insulating pressure head, 9-tested sample. DETAILED DESCRIPTION
[0020] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described with reference to the accompanying drawings.
[0021] like Figure 1 and Figure 2 As shown together, the utility model provides a pressure control fixture, including a base 1, a cold plate 2 and a bracket 3 arranged in a vertical direction are installed above the base 1, and the cold plate 2 provides a heat dissipation environment for the sample to be tested.
[0022] A slider 4 is mounted on the main body of the support 3. The slider 4 has a locking handle. The slider 4 can slide up and down along the support 3 and can be locked at its height by the locking handle.
[0023] A sliding rod 5 arranged in a vertical direction is slidably mounted on a side of the slider 4 away from the bracket 3 , and the sliding rod 5 can slide up and down in the slider 4 .
[0024] A limit block 6 is installed on the slide rod 5. The connection position of the limit block 6 and the slide rod 5 is adjustable. The limit block 6 is located above the slider 4. A ring weight 7 is placed above the limit block 6. The ring weight 7 is sleeved on the main body of the slide rod 5. The weight specification of the ring weight 7 can be selected according to needs.
[0025] An insulating pressure head 8 fixedly connected to the bottom of the sliding rod 5 is installed, and the insulating pressure head 8 is used to press down the sample 9 to be tested.
[0026] The cold plate 2 and the base 1, as well as the bracket 3 and the base 1, are fixedly connected by bolts.
[0027] The base 1 is a U-shaped structure, and the cold plate 2 is located above the inner cavity of the U-shaped structure of the base 1. The advantage of the U-shaped structure design is that it is convenient to connect the water outlet pipe or other wires at the bottom of the cold plate 2.
[0028] Adjustable supporting feet are installed at the bottom of the base 1.
[0029] Two linear bearings are embedded in the slider 4 , and the bracket 3 and the slide rod 5 are respectively passed through the linear bearings to ensure the accuracy and stability of the up and down movement of the slider 4 and the slide rod 5 .
[0030] The specific working principle of this utility model:
[0031] During the test, first place the pressure control fixture to the specified position, then according to the thickness of the sample 9 to be tested, pull the locking handle of the slider 4, adjust the slider 4 to the appropriate height, pull the locking handle again to fix the position of the slider 4, and then place the sample 9 to be tested at a suitable position below the insulating pressure head 8, adjust the height position of the limit block 6 so that the insulating pressure head 8 can press the sample 9 to be tested, and then install the annular weight 7 to the slide bar 5 as needed. The annular weight 7 is pressed on the limit block 6 by gravity, and the limit block 6, the slide bar 5 and the insulating pressure head 8 are completely fixed. Then the weight of the annular weight 7 is used as a downward force to press on the sample 9 to be tested. The pressure on the sample 9 to be tested is the sum of the weights of the annular weight 7, the limit block 6, the slide bar 5 and the insulating pressure head 8.
[0032] The above description is merely an example of the preferred embodiment of the present invention. Any details not described in detail are common knowledge within the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.
Claims
1. A pressure control fixture, characterized in that: It comprises a base (1), a cold plate (2) and a bracket (3) arranged in a vertical direction are installed above the base (1); A slider (4) is mounted on the main body of the bracket (3), and a slide rod (5) arranged in a vertical direction is slidably mounted on a side of the slider (4) away from the bracket (3); A limit block (6) is installed on the slide bar (5), the limit block (6) is located above the slider (4), an annular weight (7) is placed above the limit block (6), and the annular weight (7) is sleeved on the main body of the slide bar (5); an insulating pressure head (8) fixedly connected to the slide bar (5) is installed at the bottom of the slide bar (5).
2. A pressure control fixture according to claim 1, characterized in that: The slider (4) is provided with a locking handle, and the slider (4) can be locked at a height position along the bracket (3) by means of the locking handle.
3. A pressure control fixture according to claim 1, characterized in that: The connection position between the limit block (6) and the slide rod (5) is adjustable.
4. A pressure control fixture according to claim 1, characterized in that: The cold plate (2) and the base (1), as well as the bracket (3) and the base (1), are all fixedly connected via bolts.
5. A pressure control fixture according to claim 1, characterized in that: The base (1) is a U-shaped structure, and the cold plate (2) is located above the inner cavity of the U-shaped structure of the base (1).
6. A pressure control fixture according to claim 5, characterized in that: Adjustable supporting feet are installed at the bottom of the base (1).
7. A pressure control fixture according to claim 1, characterized in that: Two linear bearings are embedded in the slider (4), and the bracket (3) and the slide rod (5) are respectively inserted into the linear bearings.