Clamp device for optical isolation probe

Abstract

The utility model relates to a clamp device for an optical isolation probe, which comprises a connecting seat, the connecting seat is rotatably mounted with one end of a first rotating arm through a first connecting pin assembly, and the other end of the first rotating arm is rotatably mounted with one end of a second rotating arm through a second connecting pin assembly. A clamping mechanism is mounted at the other end of the second rotating arm in a matched manner through a third connecting pin assembly, and the clamping mechanism is used for clamping an optical isolation probe; the first rotating arm rotates relative to the connecting seat, and the second rotating arm rotates relative to the first rotating arm, so that the clamping mechanism drives the clamped optical isolation probe to move, and the optical isolation probe is aligned with a to-be-detected workpiece below. By arranging the first rotating arm, the second rotating arm and the clamping mechanism, the optical isolation probe can be stably supported to complete detection of the power device to be detected, manual hand holding is not needed, and the labor cost is effectively reduced; and meanwhile, the optical isolation probe can be stably limited and fixed, so that the optical isolation probe is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of power semiconductor testing technology, and in particular to a clamping device for an optically isolated probe. Background Technology

[0002] SiC and GaN devices offer significantly improved performance compared to traditional Si devices due to their extremely fast switching speeds, but this also presents challenges in performance measurement. In the dynamic characteristic measurement of SiC and GaN, opto-isolated probes, with their extremely high common-mode rejection ratio (CMRR) and accurate signal measurement capabilities, have become the most suitable detection probes for next-generation power semiconductor devices. Opto-isolated probes can suppress high-frequency common-mode noise, providing more accurate measurement results. Compared to high-voltage differential probes, they are more advantageous when measuring the gate voltage VGS / VGE of the upper arm device in a half-bridge circuit, avoiding equipment and personnel hazards, as well as measurement inaccuracies caused by transient common-mode voltages.

[0003] In related technologies, dynamic characteristic measurement equipment is usually not equipped with optically isolated probes. Therefore, operators need to hold the optically isolated probe by hand or place it directly on a support plate to test the semiconductor power devices in the dynamic characteristic measurement equipment. However, the manual hand-holding method requires high labor costs; placing it directly on the support plate makes it difficult to effectively fix the probe, and the probe is prone to tipping over during the test, resulting in probe damage. Utility Model Content

[0004] Therefore, it is necessary to provide a clamping device for optical isolation probes to address the problems of existing technologies that require manual hand-holding of the optical isolation probe for testing and poor probe fixation stability.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A clamping device for an optical isolation probe includes a connecting base, which is rotatably mounted to one end of a first rotating arm via a first connecting pin assembly. The other end of the first rotating arm is rotatably mounted to one end of a second rotating arm via a second connecting pin assembly. The other end of the second rotating arm is fitted with a clamping mechanism via a third connecting pin assembly. The clamping mechanism is used to clamp the optical isolation probe.

[0007] The first rotating arm rotates relative to the connecting seat, and the second rotating arm rotates relative to the first rotating arm, thereby driving the clamping optical isolation probe to move through the clamping mechanism, so that the optical isolation probe is aligned with the workpiece to be tested below.

[0008] As a further improvement to the above technical solution:

[0009] The clamping mechanism has the following structure: it includes a mounting plate, on the top of which are fixedly arranged vertically and a limiting plate respectively. An adjusting bolt is installed on the end face of the limiting plate, and a movable plate is fixed at the end of the adjusting bolt. The movable plate is arranged between the fixed plate and the limiting plate. An adjusting slider is fixed at the bottom of the movable plate, and the adjusting slider is installed in conjunction with an adjusting slide rail fixed to the top of the mounting plate.

[0010] Rotating the adjusting bolt causes the movable plate to move linearly along the adjusting slide rail toward or away from the fixed plate, thereby clamping or releasing the optical isolation probe.

[0011] Pads are fixed to one side wall of the fixed plate and one side wall of the movable plate.

[0012] The pad is made of polyurethane.

[0013] The mounting plate has a fixed stop block at the top, which is located on one side of the end of the adjusting slide rail.

[0014] The first connecting pin assembly, the second connecting pin assembly, and the third connecting pin assembly all include a connecting pin sleeve and a connecting pin shaft that cooperate with each other.

[0015] A central hole is provided in the middle of a single connecting pin sleeve, which is used to mate with the corresponding connecting pin shaft for installation.

[0016] One end of the first rotating arm has a first mounting hole for mounting with a corresponding connecting pin sleeve.

[0017] The second rotating arm has second mounting holes at both ends for engaging with corresponding connecting pin sleeves.

[0018] Wear-resistant pads are fitted between the first rotating arm and the connecting seat, between the first rotating arm and the second rotating arm, and between the second rotating arm and the clamping mechanism.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model has a compact and reasonable structure and is easy to operate. By setting up a first rotating arm, a second rotating arm and a clamping mechanism, it can stably support the optical isolation probe to complete the testing of the power device under test without manual handling, effectively reducing labor costs. At the same time, it can stably limit and fix the optical isolation probe, thereby avoiding damage to the optical isolation probe.

[0021] This utility model also has the following advantages:

[0022] (1) By setting a handle, it is convenient for operators to turn and tighten the adjusting bolt.

[0023] (2) By setting a polyurethane pad, the optical isolation probe can be protected and the optical isolation probe can be effectively prevented from being damaged by collision. At the same time, several parallel and spaced sawtooth grooves are also opened on a single pad. The sawtooth grooves are set on the end face of the corresponding pad and the optical isolation probe, thereby effectively improving the friction between the pad and the optical isolation probe and improving the clamping stability.

[0024] (3) By setting a stop, the stroke of the adjusting slider can be limited, thereby preventing the adjusting slider from falling off the adjusting slide rail.

[0025] (4) By setting wear-resistant pads made of POM (polyoxymethylene), the friction between corresponding components can be increased, thereby improving the positioning stability of the optical isolation probe; at the same time, it can also reduce the wear of components. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 for Figure 1 Exploded view.

[0028] Figure 3 for Figure 1 Top view.

[0029] Figure 4 for Figure 1 A bottom view.

[0030] Figure 5 This is a schematic diagram of the clamping mechanism in this utility model.

[0031] Figure 6 for Figure 5 The main view.

[0032] The components include: 1. First rotating arm; 2. Second rotating arm; 3. Connecting seat; 4. Wear-resistant pad; 5. Connecting pin sleeve; 6. Connecting pin shaft; 7. First mounting hole; 8. Second mounting hole; 9. Clamping mechanism; 10. Optical isolation probe.

[0033] 901. Mounting plate; 902. Fixing plate; 903. Movable plate; 904. Pad; 905. Limiting plate; 906. Adjusting bolt; 907. Handle; 908. Adjusting slide rail; 909. Adjusting slider; 910. Stop. Detailed Implementation

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0035] The structure and function of this utility model are as follows:

[0036] like Figures 1-6As shown, a clamping device for an optical isolation probe includes a connecting base 3. The connecting base 3 is rotatably mounted to one end of a first rotating arm 1 via a first connecting pin assembly. The other end of the first rotating arm 1 is rotatably mounted to one end of a second rotating arm 2 via a second connecting pin assembly. The other end of the second rotating arm 2 is fitted with a clamping mechanism 9 via a third connecting pin assembly. The clamping mechanism 9 is used to clamp the optical isolation probe 10. The first rotating arm 1 rotates relative to the connecting base 3, and the second rotating arm 2 rotates relative to the first rotating arm 1, thereby moving the clamped optical isolation probe 10 through the clamping mechanism 9, so that the optical isolation probe 10 is aligned with the workpiece to be tested below. By setting the first rotating arm 1, the second rotating arm 2, and the clamping mechanism 9, the optical isolation probe 10 can be stably supported to complete the testing of the power device under test, eliminating the need for manual handling and effectively reducing labor costs. At the same time, it can stably limit and fix the optical isolation probe 10, thereby preventing damage to the optical isolation probe 10.

[0037] like Figures 5-6 As shown, the clamping mechanism 9 has the following structure: it includes a mounting plate 901, on the top of which are fixedly mounted a fixed plate 902 and a limiting plate 905. An adjusting bolt 906 is fitted on the end face of the limiting plate 905, and a movable plate 903 is fixed to the end of the adjusting bolt 906. The movable plate 903 is arranged between the fixed plate 902 and the limiting plate 905. An adjusting slider 909 is fixed to the bottom of the movable plate 903. The adjusting slider 909 is fitted with an adjusting slide rail 908 fixed to the top of the mounting plate 901. By rotating the adjusting bolt 906, the movable plate 903 is driven to move linearly along the adjusting slide rail 908 towards or away from the fixed plate 902, thereby clamping or releasing the optical isolation probe 10. In this utility model, the mounting plate 901 is mounted on the second rotating arm 2 and is arranged in a horizontal direction. The top of the mounting plate 901 is arranged in parallel with a fixed plate 902, a movable plate 903 and a limiting plate 905 at intervals. The fixed plate 902 and the limiting plate 905 are fixed on the mounting plate 901. The movable plate 903 is installed in cooperation with the mounting plate 901 through the adjusting slider 909 and the adjusting slide rail 908.

[0038] The end of the adjusting bolt 906 is provided with a handle 907. The handle 907 is in the shape of a plum blossom and is integrated with the adjusting bolt 906. By providing the handle 907, it is convenient for the operator to turn the adjusting bolt 906.

[0039] A pad 904 is fixed to one side wall of the fixed plate 902 and one side wall of the movable plate 903; the pad 904 is made of polyurethane. The two pads 904 are respectively set on the two opposite side walls of the fixed plate 902 and the movable plate 903. When the movable plate 903 and the fixed plate 902 clamp the optical isolation probe 10, the two pads 904 are in close contact with the optical isolation probe 10, thereby avoiding damage to the optical isolation probe 10 due to collision and effectively protecting the optical isolation probe 10.

[0040] In addition, several parallel and spaced serrated grooves are provided on a single pad 904. The serrated grooves are provided on the end face of the pad 904 that is in contact with the optical isolation probe 10, thereby effectively improving the friction between the pad 904 and the optical isolation probe 10 and improving the clamping stability.

[0041] A top stop 910 is fixed to the mounting plate 901, and the stop 910 is arranged on one side of the end of the adjusting slide rail 908. The stop 910 can limit the stroke of the adjusting slider 909, thereby preventing the adjusting slider 909 from dislodging from the adjusting slide rail 908.

[0042] The first, second, and third connecting pin assemblies all include a connecting pin sleeve 5 and a connecting pin shaft 6 that cooperate with each other. By setting the connecting pin sleeve 5 and the connecting pin shaft 6, rotational engagement between corresponding components can be achieved, resulting in good reliability.

[0043] A central hole is formed in the middle of each connecting pin sleeve 5, which is used to mate with the corresponding connecting pin 6 for installation. The corresponding connecting pin 6 fits tightly with the central hole, thus being installed in the connecting pin sleeve 5.

[0044] The first rotating arm 1 has a first mounting hole 7 at one end for mounting with the corresponding connecting pin sleeve 5; the second rotating arm 2 has a second mounting hole 8 at both ends for mounting with the corresponding connecting pin sleeve 5.

[0045] In this utility model, the connection relationship between the first connecting pin assembly, the connecting seat 3, and the first rotating arm 1 is as follows: the connecting pin sleeve 5 in the first connecting pin assembly is rotatably installed in the first mounting hole 7. The connecting pin sleeve 5 and the first mounting hole 7 adopt an transition fit, so that the first rotating arm 1 can maintain its rotation angle after rotating into place.

[0046] The connecting pin 6 in the first connecting pin assembly passes through the connecting pin sleeve 5 installed in the first mounting hole 7 and is installed in conjunction with the third mounting hole on the connecting seat 3. The third mounting hole is provided with an internal thread for installation in conjunction with the connecting pin 6, thereby enabling rotational engagement between the first connecting arm 1 and the connecting seat 3.

[0047] Several first set screw holes are opened on the first rotating arm 1. The first set screw holes are distributed around the first mounting hole 7. A first set screw is installed in each first set screw hole. By adjusting the tightening force of the set screw on the corresponding connecting pin 6, the preload of the connecting pin 6 in the first connecting pin assembly can be increased to further ensure that the first rotating arm 1 can maintain the rotation angle after rotating into place.

[0048] The connection relationship between the second connecting pin assembly and the first rotating arm 1 and the second rotating arm 2 is as follows: the connecting pin sleeve 5 in the second connecting pin assembly is rotatably installed in the second mounting hole 8 at one end of the second rotating arm 2, and the connecting pin shaft 6 in the second connecting pin assembly passes through the connecting pin sleeve 5 and is locked with the first rotating arm 1, thereby realizing the rotational engagement between the first rotating arm 1 and the second rotating arm 2.

[0049] The connection between the third connecting pin assembly, the second rotating arm 2, and the clamping mechanism 9 is as follows: the connecting pin sleeve 5 in the third connecting pin assembly is rotatably installed in the second mounting hole 8 at the other end of the second rotating arm 2, and the connecting pin shaft 6 in the third connecting pin assembly passes through the connecting pin sleeve 5 and is locked with the mounting plate 901, thereby realizing the rotational engagement between the second rotating arm 2 and the clamping mechanism 9. By setting the third connecting pin assembly, the rotation angle of the clamping mechanism 9 can be adjusted, thereby further increasing the detection range of the optical isolation probe 10.

[0050] Several second set screw holes are arranged around the two second mounting holes 8 of the second rotating arm 2. A second set screw is installed in each second set screw hole. By adjusting the tightening force of the second set screw, the locking of the second rotating arm 2 and the clamping mechanism 9 can be ensured.

[0051] Wear-resistant pads 4 are fitted between the first rotating arm 1 and the connecting seat 3, between the first rotating arm 1 and the second rotating arm 2, and between the second rotating arm 2 and the clamping mechanism 9. The wear-resistant pads 4 are made of POM (polyoxymethylene) material, which can improve the friction between corresponding parts, thereby improving the positioning stability of the optical isolation probe 10 and preventing it from shifting during the detection process; at the same time, it can also reduce the wear of the parts.

[0052] The working process of this utility model is as follows:

[0053] First, the operator rotates the adjusting bolt 906 via the handle 907, thereby causing the movable plate 903 to move linearly away from the fixed plate 902 along the adjusting slide rail 908.

[0054] Then, place the optical isolation probe 10 between the movable plate 903 and the fixed plate 902, and rotate the adjusting bolt 906 in the opposite direction to make the movable plate 903 move in a straight line along the adjusting slide rail 908 close to the fixed plate 902 until the optical isolation probe 10 is clamped.

[0055] Finally, the operator pushes or pulls the first rotating arm 1 and the second rotating arm 2 to adjust the position of the optical isolation probe 10 so that the optical isolation probe 10 is aligned with the power device under test below it. After the adjustment is in place, the test begins.

[0056] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A clamp device for an optical isolation probe, characterized by: The utility model relates to a kind of optical isolating probe clamping mechanism, including connecting seat (3), the connecting seat (3) is rotatably installed with the head of first rotary arm (1) by first connecting pin assembly, the head of the other end of first rotary arm (1) is rotatably installed with the head of second rotary arm (2) by second connecting pin assembly, the other end of second rotary arm (2) is equipped with clamping mechanism (9) by third connecting pin assembly cooperation installation, and clamping mechanism (9) is used to clamp optical isolating probe (10); The first rotary arm (1) rotates relative to the connecting seat (3), and the second rotary arm (2) rotates relative to the first rotary arm (1), so that the optical isolating probe (10) is aligned with the workpiece to be measured below by driving the clamping mechanism (9) to move the clamped optical isolating probe (10).

2. A clamp apparatus for an optical isolation probe as defined in claim 1, wherein: The structure of the clamping mechanism (9) is as follows: an installation plate (901) is provided, and a fixed plate (902) and a limiting plate (905) are arranged on the top of the installation plate (901) in a vertical manner, the limiting plate (905) is provided with an adjusting bolt (906) on the end face, the end of the adjusting bolt (906) is fixed with a movable plate (903), the movable plate (903) is arranged between the fixed plate (902) and the limiting plate (905), the bottom of the movable plate (903) is fixed with an adjusting sliding block (909), and the adjusting sliding block (909) is fixedly arranged on the adjusting sliding rail (908) on the top of the installation plate (901). The adjusting bolt (906) is rotated to drive the movable plate (903) to move linearly along the adjusting sliding rail (908) to approach or move away from the fixed plate (902), so as to clamp or release the optical isolating probe (10).

3. A clamp apparatus for an optical isolation probe as defined in claim 2, wherein: The fixed plate (902) and the movable plate (903) are both fixed with a pad (904) on one side wall surface.

4. A clamp apparatus for an optical isolation probe as defined in claim 3, wherein: The pad (904) is made of polyurethane material.

5. A clamp apparatus for an optical isolation probe as defined in claim 2, wherein: The top of the installation plate (901) is fixed with a stop block (910), and the stop block (910) is arranged beside the end of the adjusting sliding rail (908).

6. A clamp apparatus for an optical isolation probe as defined in claim 1, wherein: The first connecting pin assembly, the second connecting pin assembly and the third connecting pin assembly all include a connecting pin sleeve (5) and a connecting pin shaft (6) matched with each other.

7. An optical isolator probe holder apparatus as claimed in claim 6, wherein: A central hole is formed in the middle of the connecting pin sleeve (5) for matching with the corresponding connecting pin shaft (6).

8. A clamp apparatus for an optical isolation probe as defined in claim 6, wherein: A first mounting hole (7) is formed in the end of the first rotary arm (1) for matching with the corresponding connecting pin sleeve (5).

9. A clamp apparatus for an optical isolation probe as defined in claim 6, wherein: Second mounting holes (8) are formed in both ends of the second rotary arm (2) for matching with the corresponding connecting pin sleeves (5).

10. A clamp apparatus for an optical isolation probe as defined in claim 1, wherein: Wear-resistant pads (4) are arranged between the first rotary arm (1) and the connecting seat (3), between the first rotary arm (1) and the second rotary arm (2), and between the second rotary arm (2) and the clamping mechanism (9).

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