A contact resistance testing device

Abstract

This utility model discloses a contact resistance testing device, including a base plate and a resistance tester. The resistance tester is mounted on the side wall of the base plate, and a servo motor is mounted on the top of the base plate. A rotating column is mounted on the top of the base plate near the servo motor, and a support frame is mounted on the top of the base plate away from the rotating column. Sliding blocks are slidably mounted on the surface of the support frame, and a U-shaped frame is provided outside the sliding blocks. A rotating disk is mounted on the top of the rotating column, and four sets of equally spaced discs are mounted on the top of the rotating disk. This utility model not only facilitates quick and stable clamping of resistors and convenient sequential testing of resistors, shortening the testing time between each set, but also facilitates convenient multi-stage movement for resistance testing, improving the testing efficiency of the device.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a contact resistance testing device. Background Technology

[0002] The resistance of a conductor is the opposition that a conductor makes to the flow of electric current. Resistance (usually represented by "R") is a physical quantity that indicates the magnitude of a conductor's opposition to the flow of electric current. The greater the resistance of a conductor, the greater its opposition to the flow of current. Different conductors generally have different resistances. Resistance is an intrinsic property of the conductor. The resistance of a conductor is usually represented by the letter R, and the unit of resistance is the ohm, abbreviated as Ω. A contact resistance tester is a specialized device used to accurately measure the resistance between two conductive contact interfaces, mainly detecting additional resistance caused by surface oxidation, contamination, or mechanical loosening.

[0003] For example, the test device for the contact resistance of a fuel cell bipolar plate disclosed in the authorization announcement number CN210347775U includes two supports arranged symmetrically from left to right. Each support includes a lower support and an upper support that can move up and down. It also includes an upper insulating plate, a lower insulating plate arranged parallel to the lower part of the upper insulating plate, an upper electrode plate fixed to the bottom of the upper insulating plate, and a lower electrode plate fixed to the upper surface of the lower insulating plate. The upper insulating plate is movably arranged between the two upper supports, and the lower insulating plate is movably arranged between the two lower supports. Measuring protrusions are provided on the sides of both the upper and lower electrode plates.

[0004] Although it enables the upper and lower electrode plates to be clamped at different positions on the bipolar plate under test during testing, thus allowing analysis of the differences in contact resistance at different positions on the same bipolar plate sample; moreover, the testing device has a simple structure and low manufacturing cost; in addition, the testing device is not directly connected to pressure equipment, and can be used with different pressure equipment, thus having good versatility.

[0005] However, this does not solve the problem that existing testing devices of this type are generally not conducive to the quick and stable clamping of resistors during use, are not convenient for sequential testing of resistors, affect the testing time between each group, and are not convenient for multi-stage movement to test resistors, thus affecting the testing efficiency of the testing device. Utility Model Content

[0006] The purpose of this invention is to provide a contact resistance testing device to solve the problems mentioned in the background art, such as the inconvenience of the testing device in quickly and stably clamping the resistor, the inconvenience of testing the resistor sequentially, which affects the testing time between each group, and the inconvenience of multi-stage movement for testing the resistor, which affects the testing efficiency of the testing device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a contact resistance testing device, comprising a base plate and a resistance tester. The resistance tester is mounted on the side wall of the base plate, a servo motor is mounted on the top of the base plate, a rotating column is mounted on the side of the top of the base plate near the servo motor, a support frame is mounted on the side of the top of the base plate away from the rotating column, a sliding block is slidably mounted on the surface of the support frame, a U-shaped frame is provided outside the sliding block, a rotating disk is mounted on the top of the rotating column, four sets of equally spaced discs are mounted on the top of the rotating disk, a triangular block is mounted on the top of each disc, an L-shaped block is mounted on the top of each triangular block, a variable frequency motor is mounted inside each triangular block, a first threaded rod is mounted on the output end of each variable frequency motor, the first threaded rod extends through the triangular block to its outside, and a first threaded block is fitted onto the surface of the first threaded rod outside the triangular block.

[0008] Preferably, each of the first threaded blocks is threadedly connected to a first threaded rod, the top end of each of the first threaded rods is connected to an L-shaped block, a support plate is movably mounted on the top end of each L-shaped block, three sets of first shafts are installed on the outer wall of each of the first threaded blocks at equal intervals, a connecting arm is fitted on the surface of each of the first shafts, a second shaft is movably mounted on the side of each connecting arm away from the first shaft, a gripper is movably mounted on the surface of each of the second shafts, a third shaft is movably mounted on the outer wall of each L-shaped block, and the gripper is movably connected to the L-shaped block through the third shaft.

[0009] Preferably, a small gear is installed at the output end of the servo motor, and a large gear is fitted on the surface of the rotating column, with the small gear meshing with the large gear.

[0010] Preferably, each of the disks has a support shaft installed at its bottom end, and the support shaft extends to the surface of the rotating disk and is movably connected to it.

[0011] Preferably, each of the outer rotating disks of the support shaft is equipped with a stepper motor, and each of the stepper motors has a worm gear installed at its output end.

[0012] Preferably, each of the surfaces of the support shaft is equipped with a worm gear, and the worm meshes with the worm gear.

[0013] Preferably, a first cylinder is installed at the top of the support frame, the output end of the first cylinder is connected to the sliding block, a second cylinder is installed on the side wall of the sliding block, and a support plate is installed at the output end of the second cylinder.

[0014] Preferably, the support plate is connected to the U-shaped frame, a power motor is installed on the side wall of the U-shaped frame, and a bidirectional threaded rod is installed at the output end of the power motor.

[0015] Preferably, a second threaded block is symmetrically mounted on the surface of the bidirectional threaded rod, the bidirectional threaded rod is threadedly connected to the second threaded block, and a detection head is mounted on the bottom end of each second threaded block.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this testing device not only facilitates the quick and stable clamping of resistors and the sequential testing of resistors, shortening the testing time between each group, but also facilitates multi-stage movement for resistor testing, thus improving the testing efficiency of the device.

[0017] (1) Place the resistors on the surface of the support plate in sequence. The variable frequency motor drives the first threaded rod to rotate. The first threaded rod drives the first threaded block to move upward. The first threaded block drives the first shaft, connecting arm and second shaft to move upward. Under the support of the L-shaped block and the third shaft, the second shaft drives the jaws to rotate around the third shaft, so that multiple sets of jaws clamp each other and clamp the resistors quickly and stably. This facilitates the quick and stable clamping of the resistors and improves the convenience of quick and stable clamping of multiple sets of resistors.

[0018] (2) The stepper motor drives the worm gear to rotate. The worm gear drives the worm wheel, support shaft, disc, triangular block, connecting arm, gripper, and resistor to rotate in a circular motion around the support shaft to adjust the position of the conductive contacts on the resistor surface. After a set of resistors has been tested, the servo motor drives the pinion to rotate. The pinion drives the large gear, rotating column, rotating disk, disc, triangular block, connecting arm, gripper, and resistor to rotate around the rotating column, so that the tested resistors are moved out of the test area and the resistors to be tested are moved to the test area. This facilitates the sequential testing of resistors and shortens the testing time between each set.

[0019] (3) The second cylinder drives the support plate to move, and the support plate drives the U-shaped frame and the detection head to move above the resistor. The first cylinder drives the sliding block, the support plate, and the U-shaped frame to descend to the surface of the resistor. The power motor drives the bidirectional threaded rod to rotate. Under the threaded connection between the bidirectional threaded rod and the second threaded block, the two sets of second threaded blocks and the detection head move in opposite directions to facilitate the contact between the detection head and the conductive contact on the surface of the resistor. This facilitates convenient multi-stage movement to test the resistor and improves the testing efficiency of the testing device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a front view structural diagram of the present utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the rotating column of this utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the disk of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the gripper of this utility model;

[0025] Figure 6 This is a front view cross-sectional structural diagram of the triangular block of this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of the support frame of this utility model;

[0027] Figure 8 This is a three-dimensional structural diagram of the U-shaped frame of this utility model;

[0028] Figure 9 This is a three-dimensional structural diagram of the support frame of this utility model;

[0029] Figure 10 This is a three-dimensional structural diagram of the sliding block of this utility model;

[0030] Figure 11 This is a three-dimensional structural diagram of the support plate of this utility model.

[0031] In the diagram: 1. Base plate; 2. Resistance tester; 3. Support frame; 4. Sliding block; 5. U-shaped frame; 6. Rotary disk; 7. First threaded rod; 8. Servo motor; 9. Rotating column; 10. Pinion; 11. Gear; 12. Stepper motor; 13. Worm gear; 14. Worm wheel; 15. Support shaft; 16. Disc; 17. Triangular block; 18. First shaft; 19. First threaded block; 20. Connecting arm; 21. Second shaft; 22. Third shaft; 23. L-shaped block; 24. Gripper; 25. First cylinder; 26. Second cylinder; 27. Support plate; 28. Power motor; 29. ​​Bidirectional threaded rod; 30. Second threaded block; 31. Detection head; 32. Variable frequency motor; 33. Support disk. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Example 1

[0036] Please see Figure 1-11 This utility model provides an embodiment of a contact resistance testing device, comprising a base plate 1 and a resistance tester 2. The resistance tester 2 is mounted on the side wall of the base plate 1. A servo motor 8 is mounted on the top of the base plate 1. A rotating column 9 is mounted on the side of the top of the base plate 1 closest to the servo motor 8. A support frame 3 is mounted on the side of the top of the base plate 1 away from the rotating column 9. A sliding block 4 is slidably mounted on the surface of the support frame 3. A U-shaped frame 5 is provided outside the sliding block 4. A rotating disk 6 is mounted on the top of the rotating column 9. Four sets of equally spaced circular disks 16 are mounted on the top of the rotating disk 6. A triangular block 17 is mounted on the top of each circular disk 16. An L-shaped block 23 is mounted on the top of each triangular block 17. A variable frequency motor 32 is mounted inside each triangular block 17. The output end of the variable frequency motor 32 is... A first threaded rod 7 is installed, and each first threaded rod 7 extends through the triangular block 17 to its outside. A first threaded block 19 is fitted on the surface of the first threaded rod 7 outside the triangular block 17. The first threaded block 19 is threadedly connected to the first threaded rod 7. The top of the first threaded rod 7 is connected to the L-shaped block 23. A support plate 33 is movably installed on the top of the L-shaped block 23. Three sets of first shafts 18 with equal spacing are installed on the outer wall of the first threaded block 19. A connecting arm 20 is fitted on the surface of the first shaft 18. A second shaft 21 is movably installed on the side of the connecting arm 20 away from the first shaft 18. A gripper 24 is movably installed on the surface of the second shaft 21. A third shaft 22 is movably installed on the outer wall of the L-shaped block 23. The gripper 24 is movably connected to the L-shaped block 23 through the third shaft 22.

[0037] When using the contact resistance testing device, the resistors are placed sequentially on the surface of the support plate 33, and the frequency conversion motor 32 is turned on sequentially. With the support of the triangular block 17, the frequency conversion motor 32 drives the first threaded rod 7 to rotate. With the threaded connection between the first threaded rod 7 and the first threaded block 19, the first threaded rod 7 drives the first threaded block 19 to move upward. The first threaded block 19 drives the first shaft 18, connecting arm 20, and second shaft 21 to move upward. With the support of the L-shaped block 23 and the third shaft 22, the second shaft 21 drives the gripper 24 to rotate around the third shaft 22, so that multiple sets of grippers 24 clamp each other, quickly and stably clamping the resistors. This facilitates quick and stable clamping of resistors and improves the convenience of quick and stable clamping of multiple sets of resistors.

[0038] A small gear 10 is installed at the output end of the servo motor 8, and a large gear 11 is fitted on the surface of the rotating column 9. The small gear 10 meshes with the large gear 11.

[0039] Each of the disks 16 has a support shaft 15 installed at its bottom end. The support shaft 15 extends to the surface of the rotating disk 6 and is movably connected to it. Each of the support shafts 15 has a stepper motor 12 installed on the surface of the rotating disk 6. Each of the stepper motor 12 has a worm gear 13 installed at its output end. Each of the support shafts 15 has a worm wheel 14 installed on its surface. The worm gear 13 and the worm wheel 14 mesh with each other.

[0040] When the resistor needs to be rotated for testing, stepper motor 12 is turned on. Supported by rotating disk 6, stepper motor 12 drives worm gear 13 to rotate. Under the meshing of worm gear 13 and worm wheel 14, worm gear 13 drives worm wheel 14, support shaft 15, disk 16, triangular block 17, connecting arm 20, gripper 24, and resistor to rotate circumferentially around support shaft 15 to adjust the position of conductive contacts on the resistor surface. After a group of resistors has been tested, servo motor 8 is turned on. Supported by base plate 1, servo motor 8 drives pinion 10 to rotate. Under the meshing of pinion 10 and large gear 11, pinion 10 drives large gear 11, rotating column 9, rotating disk 6, disk 16, triangular block 17, connecting arm 20, gripper 24, and resistor to rotate around rotating column 9. This causes the tested resistors to move out of the test area, and the resistors to be tested to move into the test area. This facilitates the sequential testing of resistors and shortens the testing time between each group.

[0041] A first cylinder 25 is installed at the top of the support frame 3. The output end of the first cylinder 25 is connected to the sliding block 4. A second cylinder 26 is installed on the side wall of the sliding block 4. A support plate 27 is installed at the output end of the second cylinder 26.

[0042] The support plate 27 is connected to the U-shaped frame 5. A power motor 28 is installed on the side wall of the U-shaped frame 5. A bidirectional threaded rod 29 is installed at the output end of the power motor 28.

[0043] The surface of the bidirectional threaded rod 29 is symmetrically equipped with second threaded blocks 30, and the bidirectional threaded rod 29 is threadedly connected to the second threaded blocks 30. The bottom end of each second threaded block 30 is equipped with a detection head 31.

[0044] When the resistor needs to be moved for testing, the second cylinder 26 is activated. Supported by the sliding block 4, the second cylinder 26 drives the support plate 27 to move. The support plate 27 moves the U-shaped frame 5 and the detection head 31 above the resistor. The first cylinder 25 is activated. Supported by the support frame 3, the first cylinder 25 drives the sliding block 4, the support plate 27, and the U-shaped frame 5 to descend to the surface of the resistor. The power motor 28 is activated. Supported by the U-shaped frame 5, the power motor 28 drives the bidirectional threaded rod 29 to rotate. With the threaded connection between the bidirectional threaded rod 29 and the second threaded block 30, the two sets of second threaded blocks 30 and the detection head 31 move in opposite directions to facilitate contact between the detection head 31 and the conductive contacts on the resistor surface. This allows the detection head 31 to contact the resistor for testing, facilitating convenient multi-stage movement for resistor testing and improving the efficiency of the testing device.

[0045] Work steps

[0046] When using the contact resistance testing device, resistors are placed sequentially on the surface of the support plate 33. The variable frequency motor 32 drives the first threaded rod 7 to rotate, which in turn drives the first threaded block 19 to move upward. The first threaded block 19 then drives the first shaft 18, connecting arm 20, and second shaft 21 to move upward. Supported by the L-shaped block 23 and the third shaft 22, the second shaft 21 drives the gripper 24 to rotate around the third shaft 22, causing multiple sets of grippers 24 to clamp the resistors in opposite directions, thus quickly and stably holding them in place. The stepper motor 12 drives the worm gear 13 to rotate, which in turn drives the worm wheel 14, support shaft 15, disc 16, triangular block 17, connecting arm 20, grippers 24, and resistors to rotate circumferentially around the support shaft 15, adjusting the position of the conductive contacts on the resistor surface. After one set of resistors has been tested, the servo motor 8 drives the pinion 10 to... The rotating mechanism, with small gear 10 driving large gear 11, rotating column 9, rotating disk 6, disc 16, triangular block 17, connecting arm 20, gripper 24, and resistor to rotate around rotating column 9, moves the tested resistor out of the test area and the resistor to be tested into the test area, facilitating convenient sequential testing of resistors. Second cylinder 26 drives support plate 27 to move, which in turn moves U-shaped frame 5 and detection head 31 above the resistor. First cylinder 25 drives sliding block 4, support plate 27, and U-shaped frame 5 to descend to the surface of the resistor. Power motor 28 drives bidirectional threaded rod 29 to rotate, causing two sets of second threaded blocks 30 and detection head 31 to move in opposite directions, facilitating contact between detection head 31 and the conductive contacts on the resistor surface, allowing the detection head 31 to contact the resistor for testing, thus completing the operation of the testing device.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A contact resistance testing device, characterized in that: The device includes a base plate and a resistance tester. The resistance tester is mounted on the side wall of the base plate, and a servo motor is mounted on the top of the base plate. A rotating column is mounted on the top of the base plate near the servo motor, and a support frame is mounted on the top of the base plate away from the rotating column. Sliding blocks are slidably mounted on the surface of the support frame, and a U-shaped frame is provided outside the sliding blocks. A rotating disk is mounted on the top of the rotating column, and four sets of equally spaced discs are mounted on the top of the rotating disk. A triangular block is mounted on the top of each disc, and an L-shaped block is mounted on the top of each triangular block. A variable frequency motor is mounted inside each triangular block, and a first threaded rod is mounted on the output end of each variable frequency motor. The first threaded rod extends through the triangular block to its outside, and a first threaded block is fitted onto the surface of the first threaded rod outside the triangular block.

2. The contact resistance testing device according to claim 1, characterized in that: The first threaded blocks are all threadedly connected to the first threaded rods. The top of each first threaded rod is connected to an L-shaped block. A support plate is movably mounted on the top of each L-shaped block. Three sets of first shafts with equal spacing are mounted on the outer wall of each first threaded block. A connecting arm is fitted onto the surface of each first shaft. A second shaft is movably mounted on the side of each connecting arm away from the first shaft. A gripper is movably mounted on the surface of each second shaft. A third shaft is movably mounted on the outer wall of each L-shaped block. The grippers are movably connected to the L-shaped block through the third shaft.

3. The contact resistance testing device according to claim 2, characterized in that: The output end of the servo motor is equipped with a small gear, and the surface of the rotating column is fitted with a large gear, with the small gear meshing with the large gear.

4. The contact resistance testing device according to claim 3, characterized in that: Each of the disks has a support shaft installed at its bottom end, and the support shaft extends to the surface of the rotating disk and is movably connected to it.

5. The contact resistance testing device according to claim 4, characterized in that: Each of the outer rotating disks of the support shaft is equipped with a stepper motor, and each of the stepper motors has a worm gear installed at its output end.

6. The contact resistance testing device according to claim 5, characterized in that: The surface of each support shaft is equipped with a worm gear, and the worm meshes with the worm gear.

7. The contact resistance testing device according to claim 6, characterized in that: A first cylinder is installed at the top of the support frame, and the output end of the first cylinder is connected to the sliding block. A second cylinder is installed on the side wall of the sliding block, and a support plate is installed at the output end of the second cylinder.

8. The contact resistance testing device according to claim 7, characterized in that: The support plate is connected to the U-shaped frame, and a power motor is installed on the side wall of the U-shaped frame. A bidirectional threaded rod is installed at the output end of the power motor.

9. The contact resistance testing device according to claim 8, characterized in that: The surface of the bidirectional threaded rod is symmetrically equipped with second threaded blocks, and the bidirectional threaded rod is threadedly connected to the second threaded blocks. A detection head is installed at the bottom end of each of the second threaded blocks.

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