Sample clamp for testing resistivity of graphite material

Abstract

The utility model relates to a sample clamp for testing the resistivity of a graphite material, which comprises a clamp unit, and the clamp unit comprises a first clamp hand which is arranged in a horizontal direction in a moving manner and a first control unit which drives the first clamp hand to move in a reciprocating manner; the wire bunching unit is connected with the clamp unit and completes wire bunching work of the wire through the control unit II; according to the utility model, the technical problem that a small-size sample cannot be tested due to the fact that the size of the existing clamp probe test is fixed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sample clamps, in particular to a sample clamp used for testing the resistivity of graphite materials. Background Art

[0002] Resistivity is a key indicator of graphite materials. Currently, the four-probe method is mainly used. It is simple to operate and widely used. The measurement principle of the four-probe method is: Resistivity is a property that indicates the resistance of a material when current passes through it. It is numerically equal to the resistance value of a conductor with a length of 1m and a cross-sectional area of ​​1m², represented by ρ. According to Ohm's law and the characteristics of the conductor, the following formula can be obtained: ρ=US / IL, where: ρ represents the resistivity of the conductor, in micro-ohm-meter μΩ·m; U represents the voltage drop across the conductor, in millivolts mV; I represents the current intensity passing through the conductor, in amperes A; S represents the cross-sectional area of ​​the sample, in square millimeters mm²; L represents the length of the conductor, in millimeters (mm);

[0003] However, in actual use, the existing fixture probe test uses a fixed size, so small-sized samples cannot be tested. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art. By arranging the probes on the fixture unit, the spacing can be adjusted to test samples of different sizes, thereby realizing a detection device for the resistivity of graphite products of different sizes, thereby solving the technical problem that the existing fixture probe test uses a fixed size, so small-sized samples cannot be tested.

[0005] In view of the above technical problems, the technical solution is as follows: a sample fixture for testing the resistivity of graphite materials, comprising:

[0006] A clamp unit, the clamp unit comprising a clamping hand 1 arranged to move in a horizontal direction and a control unit 1 for driving the clamping hand 1 to move back and forth; and

[0007] The wire bundling unit is connected with the clamp unit and completes the wire bundling work through the control unit 2.

[0008] Preferably, the clamp unit includes a cross bar and a second clamp fixedly arranged at one end of the cross bar, the first clamp elastically slides in a groove horizontally opened on the cross bar, and probes are installed on the first clamp and the second clamp and the tails are connected to the wire.

[0009] Preferably, the control unit 1 includes a driving machine 1 installed on a cross bar, a connecting rod 1 installed on the driving machine 1 and connected to the elastic part of the clamp 1, and a transmission rack 1 fixedly connected to the connecting rod.

[0010] Preferably, the wiring harness unit includes a bracket, a mounting slot arranged perpendicular to the bracket, a tightening rope installed at the end of the mounting slot near the bracket and used to position the wire, and a buckle portion slidably arranged in the mounting slot, and the wire is located in the mounting slot.

[0011] Preferably, the buckle portion includes a Chinese-shaped frame and two groups of clamping members symmetrically arranged on both sides of the Chinese-shaped frame.

[0012] Preferably, a sponge elastic block is arranged in the part of the circle frame that contacts the wire.

[0013] Preferably, the clamping member slides in a corresponding matching manner in a guide groove provided on a side surface of the mounting groove.

[0014] Preferably, the clamping member includes a sliding rod elastically and slidably arranged on the letter frame, a top block arranged at the inner end of the sliding rod and made of rubber material, and a driven plate arranged at the outer end of the sliding rod.

[0015] Preferably, the second control unit comprises:

[0016] A second transmission rack, the second transmission rack is fixedly connected to the lower end of the return frame and matched to slide on the mounting groove;

[0017] A transmission gear unit, the transmission gear unit is mounted on the bracket and is used to drive the first transmission rack and the second transmission rack for synchronous transmission;

[0018] The second driving machine is installed on the installation groove and an active plate is connected to the end thereof, and the active plate acts on the driven plate intermittently.

[0019] As further preferred, the cross bar is mounted on a bracket.

[0020] (1) In the present invention, the clamp unit cooperates with the wire harness unit, and when the gripper 1 moves horizontally to control samples of different sizes, the wire harness unit is driven to synchronously store or release the wire of the gripper 1, thereby avoiding irregular arching and pulling of the wire during the debugging process, which may cause damage and affect the test data;

[0021] (2) In the utility model, the two ends of the sample are clamped and connected to the wires with round copper sheets to pass a fixed current. The probes on the clamp unit can adjust the spacing to test samples of different sizes, thereby realizing a device for detecting the resistivity of graphite products of different sizes. The device for detecting the resistivity of graphite products is clarified, which can more comprehensively cover the sample sizes and provide reliable data guarantee for the research and development of the resistivity of graphite products and products.

[0022] In summary, the device has the advantages of simple structure and improved service life, and is particularly suitable for the field of sample fixture technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of the sample fixture used to test the resistivity of graphite materials.

[0025] Figure 2 The working status of the buckle part is shown in FIG. Figure 1 .

[0026] Figure 3 The working status of the buckle part is shown in FIG. Figure 2 .

[0027] Figure 4 A top view of the sample fixture used to test the resistivity of graphite materials Figure 1 .

[0028] Figure 5 A top view of the sample fixture used to test the resistivity of graphite materials Figure 2 .

[0029] Figure 6 Schematic side view of a sample fixture used to test the resistivity of graphite materials. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings.

[0031] Embodiment 1

[0032] like Figures 1 to 6 As shown, a sample fixture for testing the resistivity of graphite material comprises:

[0033] A clamp unit 1, the clamp unit 1 comprising a clamping hand 11 arranged to move in a horizontal direction and a control unit 12 for driving the clamping hand 11 to move back and forth; and

[0034] The wire bundling unit 2 is connected to the clamp unit 1 and completes the wire bundling work of the wire 100 through the control unit 2 3 .

[0035] In this embodiment, the clamp unit 1 is arranged to cooperate with the wire bundle unit 2, so that when the gripper 11 is moved horizontally to control samples of different sizes, the wire bundle unit 2 is driven to synchronously store or release the wire 100 of the gripper 11, thereby avoiding irregular arching and pulling of the wire 100 during debugging, which may cause damage and affect the experimental data of the test.

[0036] It is worth mentioning that the entire fixture is made of stainless steel, and round copper sheets are used to connect wires at both ends of the clamped sample to pass a fixed current. The probes on the fixture unit 1 can adjust the spacing to test samples of different sizes, thereby realizing a device for detecting the resistivity of graphite products of different sizes. The device for detecting the resistivity of graphite products is clarified, which can cover the sample size more comprehensively, and provide reliable data guarantee for the research and development of the resistivity of graphite products and products.

[0037] Further, if Figure 1 As shown, the clamp unit 1 includes a cross bar 14 and a second clamping hand 15 fixedly arranged at one end of the cross bar 14, the first clamping hand 11 is elastically slidably arranged in a groove 13 horizontally opened on the cross bar 14, and probes are installed on the first clamping hand 11 and the second clamping hand 15 and the tails of both are connected to the wire 100;

[0038] The control unit 12 includes a driving machine 121 installed on the cross bar 14, a connecting rod 122 installed on the driving machine 121 and connected to the elastic part of the gripper 11, and a transmission rack 123 fixedly connected to the connecting rod 122.

[0039] In this embodiment, the gripper 11 is guided by the groove 13 and driven by the control unit 12 to reciprocate.

[0040] In detail, the sample is pressed against the inner wall of the second gripper 15, and then the driving machine 121 is started and drives the gripper 11 to move toward the sample through the connecting rod 122. When the gripper 11 is not moving, the gripper 11 and the second gripper 15 clamp the sample by default, and then a signal is emitted through the signal sensor, and the driving machine 121 is controlled by the controller to stop working; otherwise, the operation is reversed, which will not be elaborated here.

[0041] Further, if Figures 1 to 3 As shown, the harness unit 2 includes a bracket 21, a mounting slot 22 vertically arranged with respect to the bracket 21, a tightening rope 23 installed at the end of the mounting slot 22 near the bracket 21 and used to position the wire 100, and a buckle portion 24 slidably arranged in the mounting slot 22, and the wire 100 is located in the mounting slot 22;

[0042] The buckle portion 24 includes a circular frame 241 and two sets of clamping members 242 symmetrically disposed on two sides of the circular frame 241 .

[0043] In this embodiment, through the wire bundling unit 2, when the clamp 11 moves toward the clamp 2 15, the buckle portion 24 is simultaneously translated toward the clamp unit 1, thereby completing the wire storage and bundling work, and after clamping in place, the tightening rope 23 and the clamping member 242 are used to complete the tightening of the wire 100, thereby avoiding a reduction in detection accuracy due to wire shaking during the clamping test.

[0044] Further, if Figures 2 to 3 As shown, a sponge elastic block 240 is disposed in the inner portion of the return frame 241 and in contact with the wire 100 .

[0045] In this embodiment, by providing the sponge elastic block 24 , the contact portion between the corner portion of the wire 100 and the return frame 241 is not in too hard contact, thereby protecting the service life of the wire 100 .

[0046] Further, if Figure 1 As shown, the clamping member 242 corresponds to and slides in the guide groove 220 opened on the side of the installation groove 22;

[0047] The clamping member 242 includes a sliding rod 243 elastically and slidably disposed on the return frame 241 , a top block 244 disposed at the inner end of the sliding rod 243 and made of rubber material, and a driven plate 245 disposed at the outer end of the sliding rod 243 .

[0048] In detail, the connecting rod 122 drives the transmission rack 1 123 to move horizontally. During the movement, the transmission rack 1 123 drives the transmission rack 2 31 to move through the transmission gear unit 32. At this time, the transmission rack 2 31 drives the return frame 241 to continue moving until the transmission stops.

[0049] Further, if Figure 1 As shown, the cross bar 14 is mounted on a bracket 21 .

[0050] In this embodiment, the entire structure can be transferred by installing the cross bar 14 on the bracket 21, and the all-in-one device can be easily transferred.

[0051] Embodiment 2

[0052] like Figure 6 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0053] Further, if Figures 4 to 5As shown, the control unit 2 3 includes:

[0054] The second transmission rack 31 is fixedly connected to the lower end of the return frame 241 and slides on the mounting groove 22 in a matching manner;

[0055] A transmission gear unit 32, the transmission gear unit 32 is mounted on the bracket 21 and is used to drive the transmission rack 1 123 and the transmission rack 2 31 to synchronously transmit;

[0056] The second driving machine 33 is installed on the installation groove 22 and an active plate 34 is connected to the end thereof. The active plate 34 acts on the driven plate 245 intermittently.

[0057] It is worth mentioning here that the driving machine 2 33 is driven by the sensor and the controller. When the driving machine 1 121 stops working, the driving machine 2 33 starts and acts on the driven plate 245 through the active plate 34, and then the top block 244 passes through the return frame 241 to press the wire 100; on the contrary, when the driving machine 1 121 is working, the driving machine 2 33 is reset and the driven plate 245 is released; the two are closely connected before and after working and are easy to control.

[0058] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0059] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0060] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sample fixture for testing the resistivity of graphite material, characterized in that: include: A clamp unit (1), the clamp unit (1) comprising a clamping hand (11) arranged to move in a horizontal direction and a control unit (12) for driving the clamping hand (11) to move back and forth; and A wire bundling unit (2), the wire bundling unit (2) being connected to the clamp unit (1) and completing the work of bundling the wires (100) through a second control unit (3); The clamp unit (1) comprises a cross bar (14) and a second clamping hand (15) fixedly arranged at one end of the cross bar (14); the first clamping hand (11) is elastically slidably arranged in a groove (13) horizontally provided on the cross bar (14); the first clamping hand (11) and the second clamping hand (15) are provided with probes and the tails of the two clamping hands are connected to the wire (100); The control unit 1 (12) comprises a driving machine 1 (121) mounted on a cross bar (14), a connecting rod (122) mounted on the driving machine 1 (121) and connected to the elastic part of the gripper 1 (11), and a transmission rack 1 (123) fixedly connected to the connecting rod (122); The harness unit (2) comprises a bracket (21), a mounting groove (22) arranged perpendicularly to the bracket (21), a tightening rope (23) installed at the end of the mounting groove (22) close to the bracket (21) and used to position the wire (100), and a buckle portion (24) slidably arranged in the mounting groove (22), wherein the wire (100) is located in the mounting groove (22).

2. A sample fixture for testing the resistivity of graphite material according to claim 1, characterized in that: The buckle portion (24) comprises a circular frame (241) and two groups of clamping members (242) symmetrically arranged on both sides of the circular frame (241).

3. A sample fixture for testing the resistivity of graphite material according to claim 2, characterized in that: A sponge elastic block (240) is arranged in the part of the letter-returning frame (241) that contacts the wire (100).

4. A sample fixture for testing the resistivity of graphite material according to claim 3, characterized in that: The clamping piece (242) slides in a corresponding matching manner in a guide groove (220) opened on the side of the installation groove (22).

5. A sample fixture for testing the resistivity of graphite material according to claim 2, characterized in that: The clamping member (242) comprises a sliding rod (243) elastically and slidably arranged on the letter frame (241), a top block (244) arranged at the inner end of the sliding rod (243) and made of rubber material, and a driven plate (245) arranged at the outer end of the sliding rod (243).

6. A sample fixture for testing the resistivity of graphite material according to claim 5, characterized in that: The control unit 2 (3) comprises: A second transmission rack (31), the second transmission rack (31) being fixedly connected to the lower end of the return frame (241) and matching and sliding on the mounting groove (22); A transmission gear unit (32), the transmission gear unit (32) being mounted on the bracket (21) and being used to drive the first transmission rack (123) and the second transmission rack (31) to perform synchronous transmission; The second driving machine (33) is installed on the installation groove (22) and has an active plate (34) connected to its end, and the active plate (34) acts on the driven plate (245) intermittently.

7. A sample fixture for testing the resistivity of graphite material according to claim 1, characterized in that: The cross bar (14) is mounted on the bracket (21).

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