Testing tool

Abstract

The utility model discloses a test tool, which comprises a first test assembly and a second test assembly, and is characterized in that the first test assembly comprises a first bottom plate; the second test assembly comprises a second bottom plate, a rotating shaft, a shaft fixing seat and a positioning pin. When the first to-be-detected workpiece or the second to-be-detected workpiece needs to be replaced, the first bottom plate moves upwards, left-right deviation does not occur in the upward moving process of the first bottom plate, it can be guaranteed that a contact pin between the first to-be-detected workpiece and the second to-be-detected workpiece is pulled out smoothly without being damaged, and when the first bottom plate moves upwards to a preset position, the contact pin is pulled out smoothly, so that the detection accuracy is improved. At the moment, the first bottom plate and the rotating avoiding groove in the shaft fixing seat are also located at the horizontal corresponding position, the rotating freedom degree of the first bottom plate in the horizontal direction can be released by designing the rotating avoiding groove, and therefore the operation position above the second bottom plate can be avoided, the first to-be-detected workpiece and the second to-be-detected workpiece can be conveniently replaced, and after replacement is completed, the first to-be-detected workpiece and the second to-be-detected workpiece can be conveniently replaced. And the first bottom plate is reset according to the original path.

Description

Technical Field

[0001] The present application relates to the field of tooling, and in particular to a testing tooling. Background Art

[0002] With the development of power electronics technology, IGBT modules, as one of the core devices in the field of power electronics, are widely used in the fields of drivers, electric drives, servo devices and renewable energy generation. These applications have high requirements for the working life and reliability of IGBT. Therefore, accelerated aging test is an important means to study the reliability of IGBT, and a tooling for IGBT aging test is particularly important.

[0003] Before new products are used in batches, a series of performance tests are required for IGBT modules and circuit boards of new specifications. The tooling required for batch testing has high requirements for installation, positioning, fixation, fool-proofing, disassembly, and non-destructive pins. Therefore, there is an urgent need for a test tooling that can perform multiple performance tests on IGBT modules. Utility Model Content

[0004] The embodiment of the present application provides a test tool that can install an IGBT module to facilitate testing thereof and is easy to operate.

[0005] The present application embodiment discloses a testing tool, including:

[0006] A first test assembly includes a first base plate, and the first base plate is used to install a first workpiece to be tested;

[0007] The second test assembly includes a second base plate and a rotating shaft, a shaft fixing seat and a positioning pin all arranged on the second base plate; the second base plate is arranged opposite to the first base plate in the height direction, and the second base plate is used to install the second workpiece to be tested; the rotating shaft is slidably inserted into the first base plate along its axial direction, and the first base plate can move axially and rotate around the rotating shaft; the shaft fixing seat is sequentially provided with a guide surface and a rotation avoidance groove along the height direction, the guide surface can be in contact with one side of the first base plate, and a guide channel is formed between the guide surface and the rotating shaft, the guide channel is used to limit the first base plate to move only in the height direction, the rotation avoidance groove is located above the guide surface, and the rotation avoidance groove is used to avoid the first base plate from rotating around the rotating shaft; a positioning shoulder is provided on the positioning pin, and a positioning hole matched with the positioning pin is provided on the first base plate, and the positioning shoulder is used to limit the position of the first base plate.

[0008] The test tooling of the present application has at least the following beneficial effects:

[0009] The test fixture of the present application includes a first test assembly and a second test assembly. The first test assembly includes a first base plate; the second test assembly includes a second base plate, a rotating shaft, an shaft fixing seat and a positioning pin. When the first workpiece to be measured or the second workpiece to be measured needs to be replaced, the first bottom plate is moved up. Since one side of the first bottom plate is in surface contact with the guide surface, the first bottom plate will not deviate left or right during the process of moving up, which can ensure that the pins between the first workpiece to be measured and the second workpiece to be measured are smoothly pulled out without damaging the pins. In this process, the positioning pins can also play a precise guiding role. When the first bottom plate is moved up to the predetermined position, the pins have been successfully pulled out. At this time, the first bottom plate and the rotation avoidance groove on the shaft fixing seat are also in a horizontal corresponding position. By designing the rotation avoidance groove, the rotational freedom of the first bottom plate in the horizontal direction can be released, so that the first bottom plate can be horizontally rotated 90 degrees around the rotation axis, thereby clearing the working position above the second bottom plate, so as to facilitate the replacement of the first workpiece to be measured and the second workpiece to be measured. After the replacement is completed, the first bottom plate is reset according to the original path. During the downward sliding of the first bottom plate, the first bottom plate is accurately guided by the guide surface and the positioning pins in succession, thereby ensuring that the pins between the first workpiece to be measured and the second workpiece to be measured can be accurately inserted into the pin groove, so as to realize the electrical connection between the first workpiece to be measured and the second workpiece to be measured, so as to facilitate the testing thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0011] Figure 1 It is a schematic diagram of the structure of the test tooling of the embodiment of the present application;

[0012] Figure 2 yes Figure 1 A schematic diagram of the structure of the first test component;

[0013] Figure 3 yes Figure 1 A schematic diagram of the structure of the second test component;

[0014] Figure 4 It is a partial schematic diagram of the test tooling of the embodiment of the present application;

[0015] Figure 5 is a diagram of the opening and closing process of the test tooling of the embodiment of the present application;

[0016] The description of the reference numerals is as follows: 10, first test assembly; 11, first base plate; 11a, first contoured groove; 12, first buckle; 13, linear bearing seat; 14, handle;

[0017] 20. Second test assembly; 21. Second bottom plate; 21a. Second contoured groove; 22. Rotating shaft; 23. Shaft fixing seat; 23a. Guide surface; 23b. Rotating avoidance groove; 24. Positioning pin; 24a. Positioning shoulder; 24b. Conical lead-in end; 25. Stop block; 26. Second buckle; 27. First support block; 28. Second support block; 29. ​​Anti-fool block;

[0018] 30. A first workpiece to be measured;

[0019] 40. The second workpiece to be measured. DETAILED DESCRIPTION

[0020] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] An embodiment of the present application discloses a testing tool that can be used to perform installation testing on a first workpiece to be tested 30 and a second workpiece to be tested 40, wherein the first workpiece to be tested 30 is configured as a circuit board; the second workpiece to be tested 40 is configured as an IGBT module. During testing, the pins on the IGBT module need to be inserted into the pin slots of the circuit board to achieve electrical connection between the two.

[0023] like Figure 1 As shown, the test tool of the embodiment of the present application includes a first test component 10 and a second test component 20 .

[0024] like Figure 2As shown, the first test assembly 10 includes a first base plate 11 , a first buckle 12 , a linear bearing seat 13 and a handle 14 .

[0025] The first bottom plate 11 is provided with a first profiling groove 11a, which is designed according to the outer contour of the circuit board, so that the inner contour of the first profiling groove 11a is consistent with the outer contour of the circuit board, and the circuit board can be fitted in the first profiling groove 11a.

[0026] The first buckle 12 is rotatably arranged on the first bottom plate 11. When at least part of the first buckle 12 is rotated to correspond to the first contour groove 11a, the first buckle 12 can press the circuit board into the first contour groove 11a from the height direction. When the first buckle 12 is rotated to be misaligned with the first contour groove 11a, the first buckle 12 can release the circuit board's freedom in the height direction, and then the staff can take the circuit board out of the first contour groove 11a. In the embodiment of the present application, the circuit board can be installed and fixed by the cooperation of the first contour groove 11a and the first buckle 12 to ensure the position accuracy of the circuit board and avoid the situation where the pin slot is not aligned with the pin when the circuit board moves downward.

[0027] There are multiple first pressing buckles 12 , and the multiple first pressing buckles 12 are evenly distributed on the first bottom plate 11 , and the circuit board can be pressed from multiple positions to ensure the stability and uniform force of the circuit board.

[0028] The linear bearing seat 13 is arranged on the first base plate 11, and the linear bearing seat 13 is located at a corner of the first base plate 11. The linear bearing seat 13 is used to cooperate with the rotating shaft 22 on the second test assembly 20, so that the first base plate 11 can move axially along the rotating shaft 22 and rotate horizontally around the rotating shaft 22. In some preferred embodiments, the linear bearing seat 13 is detachably arranged on the first base plate 11 by screws.

[0029] The handle 14 is disposed on the first base plate 11 . The handle 14 is designed to facilitate a worker to hold the first base plate 11 and operate the first base plate 11 to move in a height direction and rotate in a horizontal direction.

[0030] like Figure 3 and Figure 4 As shown, the second test assembly 20 includes a second base plate 21 , a rotating shaft 22 , a shaft fixing seat 23 , a positioning pin 24 , a second pressing buckle 26 , a first supporting block 27 , a second supporting block 28 and an anti-foolproof block 29 .

[0031] The second bottom plate 21 is arranged opposite to the first bottom plate 11 in the height direction, and the first bottom plate 11 can move in the height direction and rotate in the horizontal direction relative to the second bottom plate 21. The second bottom plate 21 is provided with a second profiling groove 21a, which is designed according to the outer peripheral contour of the IGBT module, so that the inner peripheral contour of the second profiling groove 21a is consistent with the outer peripheral contour of the IGBT module, and the IGBT module can be fitted and installed in the second profiling groove 21a, and the second pressing buckle 26 is rotatably arranged on the second bottom plate 21. When at least part of the second pressing buckle 26 rotates to correspond to the second profiling groove 21a, the second pressing buckle 26 can press the IGBT module in the second profiling groove 21a from the height direction. When the second pressing buckle 26 rotates to be misaligned with the second profiling groove 21a, the second pressing buckle 26 can release the freedom of the IGBT module in the height direction, and then the staff can take the IGBT module out of the second profiling groove 21a. In the embodiment of the present application, the IGBT module can be installed and fixed by the cooperation between the second contoured groove 21 a and the second pressing buckle 26 to ensure the position accuracy of the IGBT module.

[0032] In some preferred solutions, there are multiple second pressing buckles 26, and the multiple second pressing buckles 26 are evenly distributed on the second base plate 21, and the IGBT module can be pressed from multiple positions to ensure the stability and uniform force of the IGBT module.

[0033] In some preferred solutions, a plurality of fool-proofing blocks 29 are provided on the second bottom plate 21 , and the fool-proofing blocks 29 can be used to fool-proof the IGBT module and prevent the IGBT module from being incorrectly installed.

[0034] The rotating shaft 22 is vertically arranged at the corner position of the second base plate 21, and the axial direction of the rotating shaft 22 is configured as the height direction. The rotating shaft 22 can be inserted into the linear bearing seat 13 along its axial direction to realize the movement guidance of the first base plate 11. The linear bearing seat 13 and the rotating shaft 22 are clearance-matched. By designing the linear bearing seat 13, the matching area between the first base plate 11 and the rotating shaft 22 can be increased, thereby increasing the stability of the structure. It should be noted that the first base plate 11 in the embodiment of the present application may not be designed with a linear bearing seat 13, and the rotating shaft 22 can directly slide through the first base plate 11.

[0035] The shaft fixing seat 23 is vertically arranged at the corner position of the second bottom plate 21, and the axial configuration of the shaft fixing seat 23 is the height direction. The shaft fixing seat 23 is located on one side of the rotating shaft 22, wherein the overall shape of the shaft fixing seat 23 is a rectangle, and a guide surface 23a is provided on one side of the shaft fixing seat 23, and the guide surface 23a is configured as a vertical surface, and the vertical surface corresponds to the rotating shaft 22 in the horizontal direction, and a guide channel is formed between the guide surface 23a and the rotating shaft 22, and the guide channel is used to guide the first bottom plate 11 to slide up and down only in the height direction.

[0036] Among them, the guide surface 23a can be in contact with the horizontal side wall of the first base plate 11. Since there is surface contact between the guide surface 23a and the first base plate 11, the freedom of horizontal rotation of the first base plate 11 is limited, which can ensure the accuracy of the first base plate 11 and the circuit board on the first base plate 11 during movement, thereby avoiding damage caused by collision between the pins and the pin slots.

[0037] The shaft fixing seat 23 is also provided with a rotation avoidance groove 23b for avoiding the first bottom plate 11. In the height direction, the rotation avoidance groove 23b is located above the guide surface 23a. When the first bottom plate 11 moves upward to correspond to the rotation avoidance groove 23b in the horizontal direction, the first bottom plate 11 has escaped from the restricted range of the guide surface 23a. At the same time, due to the existence of the rotation avoidance groove 23b, the first bottom plate 11 can rotate around the rotation axis 22 in the horizontal direction by a certain angle (for example, 90 degrees). The purpose of the rotation of the first bottom plate 11 is to clear the working position above the second bottom plate 21, thereby facilitating the staff to replace or disassemble the IGBT module on the second bottom plate 21.

[0038] In some preferred solutions, the inner width of the rotation avoidance groove 23b along the height direction is defined as D1, and the thickness of the first bottom plate 11 along the height direction is defined as D2, and D1 is 1.1 to 1.5 times, for example, 1.3 times, of D2. In the embodiment of the present application, by designing the size relationship between the width of the rotation avoidance groove 23b and the first bottom plate 11, when the first bottom plate 11 rotates into the rotation avoidance groove 23b, the rotation avoidance groove 23b can limit the up and down movement of the first bottom plate 11 and play a limiting role. At the same time, the inner width of the rotation avoidance groove 23b cannot be designed to be too close to the thickness of the first bottom plate 11, otherwise it will increase the difficulty of aligning the first bottom plate 11 with the rotation avoidance groove 23b.

[0039] In some preferred solutions, the upper end surface of the shaft fixing seat 23 is detachably provided with a limit block 25, and the limit block 25 overlaps at least partially with the projection of the first base plate 11 in the height direction. By designing the limit block 25, the first base plate 11 can be restricted from upwardly disengaging from the rotating shaft 22, and it is convenient to upwardly withdraw the first base plate 11 from the rotating shaft 22 when the first base plate 11 needs to be replaced. On the other hand, when the upper surface of the linear bearing seat 13 abuts against the lower surface of the limit block 2, it indicates that the first base plate 11 is already in a position corresponding to the rotation avoidance groove 23b. The limit block 25 can be detachably provided in a manner such as magnetic attraction, screw connection, etc.

[0040] The positioning pin 24 is vertically arranged on the second bottom plate 21, and the axial direction of the positioning pin 24 is arranged in the height direction, wherein the positioning pin 24 is used to cooperate with the positioning hole on the first bottom plate 11 to achieve the movement guidance and position limitation of the first bottom plate 11. The positioning pin 24 is provided with a positioning shoulder 24a, which can be in contact with the lower surface of the first bottom plate 11, and plays the role of limiting and bearing the first bottom plate 11.

[0041] In some preferred solutions, the upper end of the positioning pin 24 is configured as a tapered lead-in end 24b, which is convenient for inserting into the positioning hole on the first bottom plate 11. The purpose of designing the tapered lead-in end 24b is to reduce the difficulty of aligning the first bottom plate 11 with the positioning pin 24, thereby avoiding misalignment of the positioning pin 24 when the first bottom plate 11 moves downward.

[0042] The first support block 27 and the second support block 28 are both arranged on the second base plate 21, and the first support block 27, the second support block 28 and the positioning pin 24 are distributed in a triangular shape on the second base plate 21, and the upper end surfaces of the first support block 27 and the second support block 28 are both configured as support surfaces, which are located at the same height as the positioning shoulder 24a of the positioning pin 24, and have the same function as the positioning shoulder 24a, and are both used to support and restrict the first base plate 11. In the embodiment of the present application, the first support block 27, the second support block 28 and the positioning pin 24 are distributed in a triangular shape, which can achieve multi-point support to ensure the stability of the first base plate 11.

[0043] A working method of the test tool in the embodiment of the present application is as follows: Figure 5 As shown:

[0044] 1. The first bottom plate 11 is lifted up by the handle 14 to realize the upward movement of the first bottom plate 11 (the moving direction is shown by the arrow F1). During the upward movement, the side wall of the first bottom plate 11 and the guide surface 23a of the shaft fixing seat 23 are in surface contact, which can limit the first bottom plate 11 and prevent the first bottom plate 11 from rotating horizontally;

[0045] When the first bottom plate 11 moves upward to the top, the pins between the circuit board and the IGBT module are completely removed, and at the same time, the first bottom plate 11 and the rotation avoidance groove 23b on the shaft fixing seat 23 correspond to each other in the horizontal direction. At this time, the first bottom plate 11 can be rotated outward horizontally and make way for the upper space of the second bottom plate 21 (the rotation direction is shown by the arrow F2), so that the staff can conveniently perform the operation of replacing the workpiece on the second bottom plate 21;

[0046] 2. Place the new circuit board in the first profiling groove 11a. When the circuit board is in place, rotate the first buckle 12 to install the circuit board; place the new IGBT module in the second profiling groove 21a. When the IGBT module is in place, rotate the second buckle 26 to install the IGBT module; during the installation of the IGBT module, an anti-mistake block 29 is designed to prevent misplacement;

[0047] 3. Holding the handle 14, the first base plate 11 is rotated out of the rotation avoidance groove 23b. After rotating out, the first base plate 11 is located directly above the second base plate 21. The first base plate 11 and the circuit board on the first base plate 11 are lowered by the handle 14. During the lowering process, the side wall of the first base plate 11 is in contact with the guide surface 23a of the shaft fixing seat 23. At this time, the rough positioning of the first base plate 11 is completed, and the first base plate 11 is continued to be lowered until the positioning pin 24 is inserted into the positioning hole on the first base plate 11, thereby achieving fine positioning. The first base plate 11 is further lowered, and the pins of the IGBT module are inserted into the pin slots of the circuit board to achieve electrical connection between the IGBT module and the circuit board. Finally, the lower surface of the first base plate 11 falls on the positioning shaft shoulder 24a of the positioning pin 24 and the supporting surfaces of the first support block 27 and the second support block 28. At this time, the positioning and installation of the workpiece are completed, and the electrical performance test work is started.

[0048] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A test tool, characterized in that: include: A first test assembly (10) comprises a first base plate (11), wherein the first base plate (11) is used for mounting a first workpiece (30) to be tested; The second test assembly (20) comprises a second base plate (21) and a rotating shaft (22), a shaft fixing seat (23) and a positioning pin (24) all arranged on the second base plate (21); the second base plate (21) and the first base plate (11) are arranged opposite to each other in the height direction, and the second base plate (21) is used to install the second workpiece (40) to be tested; the rotating shaft (22) is slidably arranged on the first base plate (11) along its axial direction, and the first base plate (11) can move in the axial direction of the rotating shaft (22) and rotate around the rotating shaft (22); the shaft fixing seat (23) is provided with a guide surface (23a) and a rotation avoidance groove (23b) in sequence along the height direction ), the guide surface (23a) can be in close contact with one side of the first bottom plate (11), and a guide channel is formed between the guide surface (23a) and the rotation axis (22), the guide channel is used to limit the first bottom plate (11) to move only in the height direction, the rotation avoidance groove (23b) is located above the guide surface (23a), and the rotation avoidance groove (23b) is used to avoid the first bottom plate (11) from rotating around the rotation axis (22); the positioning pin (24) is provided with a positioning shoulder (24a), and the first bottom plate (11) is provided with a positioning hole that is inserted and matched with the positioning pin (24), and the positioning shoulder (24a) is used to limit the position of the first bottom plate (11).

2. The test tool according to claim 1, characterized in that: The first bottom plate (11) is provided with a first profiling groove (11a), the inner peripheral contour of the first profiling groove (11a) is consistent with the outer peripheral contour of the first workpiece (30) to be measured, and the first workpiece (30) to be measured is arranged in the first profiling groove (11a); the first bottom plate (11) is provided with a plurality of rotatable first pressing buckles (12), and the first pressing buckles (12) are used to press the first workpiece (30) to be measured (30) in the first profiling groove (11a).

3. The test tool according to claim 1, characterized in that: The inner width of the rotation avoidance groove (23b) is defined as D1, the thickness of the first bottom plate (11) is defined as D2, and D1 is 1.1 to 1.5 times of D2.

4. The test tool according to claim 1, characterized in that: The first test assembly (10) further comprises a linear bearing seat (13) arranged on the first base plate (11), and the rotating shaft (22) is slidably inserted into the linear bearing seat (13) along its axial direction.

5. The test tool according to claim 1, characterized in that: The first bottom plate (11) is provided with a handle (14) for facilitating the movement of the first bottom plate (11).

6. The test tool according to any one of claims 1 to 5, characterized in that: The upper end of the positioning pin (24) is provided with a tapered introduction end (24b).

7. The test tool according to any one of claims 1 to 5, characterized in that: A limit block (25) is detachably provided on the shaft fixing seat (23), and the limit block (25) is used to limit the first bottom plate (11) from separating from the rotating shaft (22).

8. The test tool according to claim 1, characterized in that: The second bottom plate (21) is provided with a second profiling groove (21a), the inner peripheral contour of the second profiling groove (21a) is consistent with the outer peripheral contour of the second workpiece (40) to be measured, and the second workpiece (40) to be measured is arranged in the second profiling groove (21a); ​​the second bottom plate (21) is provided with a plurality of rotatable second pressing buckles (26), and the second pressing buckles (26) are used to press the second workpiece (40) to be measured (40) in the second profiling groove (21a).

9. The test tool according to claim 1, characterized in that: The invention also comprises a first support block (27) and a second support block (28); the first support block (27), the second support block (28) and the positioning pin (24) are distributed in a triangular shape on the second bottom plate (21), and the first support block (27) and the second support block (28) are both provided with a support surface for supporting the first bottom plate (11), and the support surface and the positioning shoulder (24a) of the positioning pin (24) are located at the same height.

10. The test fixture according to claim 1, characterized in that: The second bottom plate (21) is provided with an anti-mistake block (29) for preventing the second workpiece (40) to be measured from being misplaced.

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