Clamping mechanism for PIN drawing force test

Abstract

The utility model provides a clamping mechanism for a PIN drawing force test. The clamping mechanism is installed on a lifting mechanism of external drawing force test equipment. The clamping mechanism comprises a driving assembly and a clamping assembly; the driving assembly comprises an air cylinder and a plurality of traction rods, and one end of each traction rod is movably connected to the transmission end of the air cylinder. The clamping assembly comprises a plurality of clamping rods which are movably connected to the other ends of the traction rods in a one-to-one correspondence mode and can generate magnetic fields which attract one another, the lower end of each clamping rod in the clamping rods is provided with a clamping part, and the clamping parts can get close to one another under the action of the traction rods and the magnetic fields so as to clamp the PINs. According to the utility model, the problems that the clamping mechanism in the existing drawing force testing equipment is manually operated and the operation space and the contact area with the PIN needle are small, so that the clamping efficiency of the PIN needle is low and the clamping stability is poor can be solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of clamping mechanisms, and more specifically, relates to a clamping mechanism for testing the pull-out force of PIN pins. Background Technology

[0002] PIN pull-out force testing refers to applying pull-out force to the PIN pins of an IGBT module to evaluate their physical properties and fatigue characteristics under dynamic pulling forces. This test is mainly used to detect whether the solder layer between the PIN pin and the copper layer will experience fatigue fracture due to frequent pull-out forces.

[0003] Currently, most pull-out force tests on PIN pins are conducted using pull-out force testing equipment such as fatigue testing machines. However, the clamping mechanisms in existing pull-out force testing equipment are manually driven, and the limited space for manual operation makes clamping the PIN pins difficult. Furthermore, the clamping part of the existing pull-out force testing equipment only makes point contact with the PIN pin, leading to slippage and other problems that affect the test results during testing. Therefore, the existing clamping mechanisms have low clamping efficiency and poor clamping stability, which is not conducive to PIN pin pull-out force testing and requires further improvement. Utility Model Content

[0004] The purpose of this invention is to solve the problems of low clamping efficiency and poor clamping stability in existing pull-out force testing equipment, which are caused by manual operation of the clamping mechanism, small operating space and small contact area with the PIN needle.

[0005] To achieve the above objectives, this utility model provides a clamping mechanism for PIN pin pull-out force testing, which is installed on the lifting mechanism of an external pull-out force testing device;

[0006] The clamping mechanism includes a drive component and a clamping component;

[0007] The drive assembly includes a cylinder and a plurality of traction rods, one end of each of the plurality of traction rods being movably connected to the transmission end of the cylinder;

[0008] The clamping assembly includes a plurality of clamping rods that are movably connected to the other end of each of the traction rods and are capable of generating mutually attractive magnetic fields. The lower end of each of the plurality of clamping rods has a clamping portion.

[0009] The clamping parts can move closer to each other under the influence of each traction rod and the magnetic field to clamp the PIN needle.

[0010] Alternatively, the clamping part may be arc-shaped.

[0011] Optionally, the clamping part is provided with anti-slip protrusions to prevent the PIN pin from sliding.

[0012] Optionally, each of the clamps is provided with a magnetic block for generating a magnetic field that attracts each of the clamps to each other.

[0013] Optionally, a traction disc is provided on the transmission end, and each traction rod is evenly distributed along the circumference of the traction disc and connected at one end to the traction disc.

[0014] Optionally, a control handle for controlling the cylinder is connected to the control end of the cylinder.

[0015] Optionally, the cylinder is fitted with a mounting bracket for mounting it on the lifting mechanism.

[0016] Optionally, the lower end of the mounting bracket is provided with a limiting bracket for limiting the movement of each of the traction rods and each of the clamping rods.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention proposes a clamping mechanism for PIN pull-out force testing. The mechanism comprises a drive assembly and a clamping assembly. The drive assembly includes a cylinder and several traction rods, one end of which is movably connected to the transmission end of the cylinder. The clamping assembly includes several clamping rods, each correspondingly connected to the other end of each traction rod and capable of generating mutually attractive magnetic fields. Each clamping rod has a clamping portion at its lower end. These clamping portions can approach each other under the influence of each traction rod and the magnetic field to clamp the PIN. Compared to existing clamping mechanisms in pull-out force testing equipment, this invention's cylinder-driven clamping mechanism effectively reduces the limitations imposed by space constraints, significantly improving PIN clamping efficiency. Furthermore, the presence of the magnetic field creates a greater interaction force between the clamping portions, increasing the clamping force on the PIN.

[0019] Furthermore, the clamping part of this utility model is arc-shaped, and anti-slip protrusions are provided inside the clamping part, thereby increasing the contact area between the PIN needle and the clamping part, so as to improve the stability of the PIN needle during the testing process and ensure the accuracy of the PIN needle pull-out force test.

[0020] As can be seen from the above, this utility model can effectively solve the problems of low clamping efficiency and poor clamping stability of the existing pull-out force testing equipment, which are caused by the manual operation of the clamping mechanism, small operating space and small contact area with the PIN needle.

[0021] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] This invention can be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts.

[0023] Figure 1 A schematic diagram of a clamping mechanism for PIN pin pull-out force testing according to an embodiment of the present invention is shown.

[0024] Figure 2 A cross-sectional view of a clamping mechanism for PIN pin pull-out force testing according to an embodiment of the present invention is shown.

[0025] Figure label:

[0026] 1-Cylinder;

[0027] 2-Traction rod;

[0028] 3-Clamping rod;

[0029] 31-Clamping part;

[0030] 4-PIN pins;

[0031] 5- Mounting bracket;

[0032] 6-Traction disc;

[0033] 7-Limit bracket;

[0034] 8-Magnetic blocks;

[0035] 9- Anti-slip protrusions. Detailed Implementation

[0036] To enable those skilled in the art to more fully understand the technical solution of this utility model, exemplary embodiments of this utility model will be described more comprehensively and in detail below with reference to the accompanying drawings. Obviously, the one or more embodiments of this utility model described below are merely one or more specific ways to implement the technical solution of this utility model, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solution of this utility model, and it should not be limited to the embodiments described exemplary. Based on one or more embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0037] Example: Figure 1A schematic diagram of a clamping mechanism for PIN pin pull-out force testing according to an embodiment of the present invention is shown. Figure 2 A cross-sectional view of a clamping mechanism for PIN pin pull-out force testing according to an embodiment of the present invention is shown.

[0038] Reference Figure 1-2 An embodiment of this utility model provides a clamping mechanism for PIN pin pull-out force testing, which is installed on the lifting mechanism of an external pull-out force testing device;

[0039] The clamping mechanism includes a drive component and a clamping component;

[0040] The drive assembly includes a cylinder 1 and a plurality of traction rods 2, one end of each of the plurality of traction rods 2 being movably connected to the transmission end of the cylinder 1;

[0041] The clamping assembly includes a plurality of clamping rods 3 that are movably connected to the other end of each traction rod 2 and are capable of generating a magnetic field that attracts each other. The lower end of each clamping rod 3 has a clamping part 31.

[0042] The clamping parts 31 can move closer to each other under the influence of each traction rod 2 and the magnetic field to clamp the PIN needle 4.

[0043] In one specific embodiment, a mounting bracket 5 is fitted onto the cylinder 1 for mounting it onto the lifting mechanism. Specifically, the mounting bracket can be connected to the lifting mechanism via fasteners such as bolts. The structure and principle of the external pull-out force testing equipment and its lifting mechanism are existing technologies and will not be described in detail here.

[0044] In one embodiment, a control handle (not shown in the figure) for controlling the cylinder 1 is connected to the control end. Specifically, the control handle can be manual, foot-operated, or integrated into the control system of an external pull-out force testing device to facilitate manual operation.

[0045] In one embodiment, a traction disc 6 is provided on the transmission end, and each traction rod 2 is evenly distributed along the circumference of the traction disc 6 and connected at one end to the traction disc 6. This allows the traction disc to move one end of each traction rod up and down via a cylinder.

[0046] In one specific embodiment, the lower end of the mounting bracket 5 is provided with a limiting bracket 7 for limiting the movement of each traction rod 2 and each clamping rod 3. Specifically, two limiting brackets are symmetrically arranged on each traction rod and each clamping rod to guide the movement of each traction rod and each clamping rod.

[0047] In one specific embodiment, the clamping assembly includes four clamping rods 3. Of course, it should be understood that the number of clamping rods can also be other than this, and the present invention is not limited thereto. Any number of clamping rods that can achieve the same technical effect as the present invention is also within the protection scope of the present invention.

[0048] In one embodiment, each clamp 3 is provided with a magnetic block 8 for generating a magnetic field that attracts each clamp 3 to the other.

[0049] In one specific embodiment, the magnetic block 8 is arc-shaped.

[0050] Specifically, when the magnetic block clamps the PIN needle, it can use the force generated by the magnetic block to attract each clamp bar to make the clamping part and the PIN needle in close contact, thereby improving the stability of the PIN needle during the pull-out force test.

[0051] In one specific embodiment, the clamping part 31 is arc-shaped.

[0052] In one embodiment, the clamping part is provided with anti-slip protrusions 9 to prevent the PIN pin from sliding.

[0053] Specifically, the arc shape and anti-slip protrusions enable the clamping part to better fit the surface of the PIN, thereby increasing the contact area between the clamping part and the PIN and further improving the stability of the PIN during the pull-out force test.

[0054] In use, the clamping mechanism of this invention is mounted on the lifting mechanism of an external pull-out force testing device. Before clamping the PIN, the operator places the PIN to be tested between each clamping bar, ensuring it is level with the clamping part. Then, the operator operates the control handle to activate the cylinder, which moves the traction disc downwards. During this process, the extension direction of each traction bar gradually becomes horizontal, causing the clamping parts of each clamping bar to approach each other until they contact and tightly clamp the PIN. Next, the lifting mechanism of the external pull-out force testing device can drive the entire clamping mechanism to move, thus performing a pull-out force test on the PIN. After the test, the cylinder can be activated to move the traction disc upwards, releasing the PIN.

[0055] This invention proposes a clamping mechanism for PIN pull-out force testing. The mechanism comprises a drive assembly and a clamping assembly. The drive assembly includes a cylinder and several traction rods, one end of which is movably connected to the transmission end of the cylinder. The clamping assembly includes several clamping rods, each correspondingly connected to the other end of each traction rod and capable of generating mutually attractive magnetic fields. Each clamping rod has a clamping portion at its lower end. These clamping portions can approach each other under the influence of each traction rod and the magnetic field to clamp the PIN. Compared to existing clamping mechanisms in pull-out force testing equipment, this invention's cylinder-driven clamping mechanism effectively reduces the limitations imposed by space constraints, significantly improving PIN clamping efficiency. Furthermore, the presence of the magnetic field creates a greater interaction force between the clamping portions, increasing the clamping force on the PIN.

[0056] Furthermore, the clamping part of this utility model is arc-shaped, and anti-slip protrusions are provided inside the clamping part, thereby increasing the contact area between the PIN needle and the clamping part, so as to improve the stability of the PIN needle during the testing process and ensure the accuracy of the PIN needle pull-out force test.

[0057] While one or more embodiments of the present invention have been described above, those skilled in the art will recognize that the present invention can be implemented in any other form without departing from its spirit and scope. Therefore, the embodiments described above are illustrative and not restrictive, and many modifications and substitutions will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A clamping mechanism for PIN pull-out force testing, characterized in that, Installed on the lifting mechanism of the external pull-out force testing equipment; The clamping mechanism includes a drive component and a clamping component; The drive assembly includes a cylinder and a plurality of traction rods, one end of each of the plurality of traction rods being movably connected to the transmission end of the cylinder; The clamping assembly includes a plurality of clamping rods that are movably connected to the other end of each of the traction rods and are capable of generating mutually attractive magnetic fields. The lower end of each of the plurality of clamping rods has a clamping portion. The clamping parts can move closer to each other under the influence of each traction rod and the magnetic field to clamp the PIN needle.

2. The clamping mechanism for PIN pin pull-out force testing according to claim 1, characterized in that, The clamping part is arc-shaped.

3. The clamping mechanism for PIN pin pull-out force testing according to claim 1, characterized in that, The clamping part is provided with anti-slip protrusions to prevent the PIN pin from sliding.

4. The clamping mechanism for PIN pull-out force testing according to claim 1, characterized in that, Each of the clamps is provided with a magnetic block for generating a magnetic field that attracts each of the clamps to each other.

5. The clamping mechanism for PIN pin pull-out force testing according to claim 1, characterized in that, A traction disc is provided on the transmission end, and each traction rod is evenly distributed along the circumference of the traction disc and is connected to the traction disc at one end.

6. The clamping mechanism for PIN pin pull-out force testing according to claim 1, characterized in that, The cylinder has a control handle connected to its control end.

7. The clamping mechanism for PIN pull-out force testing according to claim 6, characterized in that, The cylinder is fitted with a mounting bracket for mounting it on the lifting mechanism.

8. The clamping mechanism for PIN pull-out force testing according to claim 7, characterized in that, The lower end of the mounting bracket is provided with a limiting bracket for limiting the movement of each of the traction rods and each of the clamping rods.

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