A clamp structure for current-carrying friction experiment

Abstract

The utility model discloses a kind of clamp structures of current-carrying friction experiment, including base, the middle position of base is threadedly installed with upper fixed clamp, the middle of upper fixed clamp is detachably limit installed with pin clamp, the middle of pin clamp is detachably limit installed with conductor, brass block is clamped and fixed between conductor and pin clamp, brass block is detachably electrically connected with wire, conductor is electrically connected with wire by brass block, can be installed according to the length of conductor, simple structure, processing and manufacturing are convenient, have good current conduction effect, can be realized when the length of conductor changes, without replacing clamp, just need to replace installation position to continue to carry out experiment, it is favorable to control the variable of experiment, improve the accuracy of experimental result.

Description

Technical Field

[0001] This utility model relates to the field of current-carrying friction experiment technology, and in particular to a fixture structure for current-carrying friction experiments. Background Technology

[0002] The main purpose of current-carrying triboelectric experiments is to study the triboelectric and wear behavior of materials in the presence of current. These studies are crucial for improving the performance and lifespan of key components in fields such as power transmission systems, modern railway transportation systems, and industrial generators.

[0003] During the experiment, the external current is conducted to the experimental object through the conductor. There is a certain contact pressure and relative velocity between the conductor and the experimental object. The relative position and contact state between the conductor and the experimental object directly affect the reliability of the experimental results. If the clamp for fixing the conductor is changed continuously in the same group of experiments, it will have a certain impact on the relative position and contact state between the conductor and the experimental object, and thus affect the experimental results. Most pin clamps have conductive properties, which pose a safety hazard in the current-carrying friction experiment. Utility Model Content

[0004] This invention provides a fixture structure for a current-carrying friction experiment, aiming to solve the problems mentioned above, such as the error caused by changing fixtures in the existing current-carrying friction experiment and the installation risks posed by the conductive properties of most fixtures.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A fixture structure for a current-carrying friction experiment includes a base, an upper fixing fixture threadedly mounted at the middle position of the base, an insulating pin fixture detachably fixed at the middle of the upper fixing fixture, a conductor detachably fixed at the middle of the pin fixture, a brass block clamped and fixed between the conductor and the pin fixture, a wire detachably electrically connected to the brass block, and the conductor electrically connected to the wire through the brass block.

[0006] Preferably, a threaded sleeve is fixedly connected to one side of the upper fixing clamp via a connecting section, and a threaded post is provided in the middle of the base. The threaded sleeve and the threaded post form a threaded engagement, and the upper fixing clamp is suspended and fixed on the threaded sleeve via the connecting section.

[0007] More preferably, the upper fixing clamp has a circular hole in the middle of the suspension part, and an opening on one side of the circular hole. The opening passes through the upper fixing clamp in the direction away from the connecting section along the radial side of the circular hole. The opening and the circular hole cooperate with the suspension part of the upper fixing clamp to form a "door" shaped structure. The upper fixing clamp on both sides of the opening has corresponding through holes. Fastening bolts are installed in the through holes, and the upper fixing clamp on both sides of the opening is pressed together by the fastening bolts.

[0008] Furthermore, a stepped shaft section is provided in the middle of one end of the pin clamp. The stepped shaft section includes a concentric and coaxial upper stepped shaft section and a lower stepped shaft section. The upper stepped shaft section is fixedly engaged with the pin clamp through the lower stepped shaft section.

[0009] Furthermore, the upper stepped shaft segment is concentrically and coaxially embedded in the circular hole. When the fastening bolt is continuously tightened, the opening is compressed by the fastening bolt, and the diameter of the circular hole gradually decreases as the opening is compressed, thus clamping and fixing the upper stepped shaft segment.

[0010] Specifically, the upper fixing fixture located on one side of the circular hole is provided with a cylindrical boss. The cylindrical boss extends along the axial direction of the circular hole toward the side away from the connecting section of the upper fixing fixture. The lower stepped shaft section is provided with a limiting groove corresponding to the cylindrical boss. When the upper stepped shaft section is embedded in the circular hole, the cylindrical boss is embedded in the limiting groove to form a limiting fit.

[0011] More specifically, the pin clamp has an inner hole at the middle of the end away from the stepped shaft section, and a second screw hole on one side of the pin clamp extends into the inner hole. A brass block for connecting wires is embedded in the inner hole, and a conductor is embedded in the inner hole and engages with the inner hole to press the brass block. A fastening screw is threadedly embedded in the second screw hole and engages with the inner hole to clamp and fix the conductor. There is a side hole on one side of the inner hole through the pin clamp, and the wire on the brass block passes out from the side hole.

[0012] In detail, the pin clamp located on one side of the inner hole has a square hole. The second screw hole passes through the square hole and communicates with the inner hole. A square nut is embedded in the square hole. After the fastening screw is threadedly engaged with the second screw hole, it passes through the square hole and forms a threaded engagement with the square nut. Then it passes through the square nut and enters the inner hole through the second screw hole.

[0013] Preferably, the brass block is a cylinder with a concentric and coaxial mounting groove inside. The groove opening has a third screw hole, and the side of the brass block has a radially arranged countersunk hole that communicates with the mounting groove. The end of the wire enters the mounting groove through the countersunk hole. A fastening screw is threaded into the third screw hole, and the end of the fastening screw engages with the mounting groove to clamp and fix the wire. The top of the fastening screw does not exceed the top of the brass block.

[0014] More preferably, a number of insulating pads are detachably assembled on the side of the brass block away from the conductor. A limiting post is provided at the top center of the insulating pad, and a limiting groove that fits into the bottom of the insulating pad is provided. The limiting post and the adjacent limiting groove form a limiting fit. The side of the brass block away from the conductor is provided with a limiting groove that fits into the limiting post.

[0015] The beneficial effects of this utility model are: 1. It can reliably fix the relative position between the conductor and the experimental object, has high current conduction efficiency, and can be adapted to conductors of different lengths. It does not require frequent changes of clamps, which is conducive to controlling experimental variables and improving the reliability of experimental results. 2. The device is simple and convenient to install. Most of the fastening is achieved directly or indirectly through threaded connections, making it highly practical. The pin clamps are made of insulating materials, which can avoid safety hazards. 3. The insulating pads ensure that the brass block remains electrically connected to the conductor, making it easy to adapt to different heights and control the length of the conductor protruding from the pin clamp, thus reducing error factors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of this utility model; Figure 2 This is a schematic diagram of the disassembly structure of this utility model; Figure 3 This is a schematic diagram of the upper fixing clamp of this utility model; Figure 4 This is a schematic diagram of the pin clamp of this utility model; Figure 5 This is a schematic diagram of the structure of the brass block of this utility model; In the diagram: 1. Upper fixing clamp; 2. Round hole; 3. Pin clamp; 4. Square nut; 5. Insulating washer; 6. Opening; 7. Through hole; 8. Cylindrical boss; 9. Base; 10. Conductor; 11. Square hole; 12. Inner hole; 13. Second screw hole; 14. Side hole; 15. Limiting groove; 16. Stepped shaft section; 17. Third screw hole; 18. Side countersunk hole; 19. Brass block. Detailed Implementation

[0017] The embodiments will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-5 As shown in the preferred embodiment 1, a fixture structure for a current-carrying friction experiment includes a base 9. An upper fixing fixture 1 is threadedly installed at the middle position of the base 9. An insulating pin fixture 3 is detachably and limitly installed at the middle of the upper fixing fixture 1. A conductor 10 is detachably and limitly installed at the middle of the pin fixture 3. A brass block 19 is clamped and fixed between the conductor 10 and the pin fixture 3. A wire is detachably and electrically connected to the brass block 19. The conductor 10 is electrically connected to the wire through the brass block 19.

[0019] One side of the upper fixing clamp 1 is fixedly connected to a threaded sleeve via a connecting section. A threaded post is provided in the middle of the base 9. The threaded sleeve and the threaded post form a threaded engagement, and the upper fixing clamp 1 is suspended and fixed to the threaded sleeve via the connecting section. The base 9 is an existing structure. In use, the upper fixing clamp 1 is fixed to the base 9 through the threaded engagement between the threaded sleeve and the threaded post. The suspension design ensures that the opening 6 of the upper fixing clamp 1 does not conflict with the fixed installation of the base 9 when closed.

[0020] The upper fixing clamp 1 has a circular hole 2 in the middle of the suspension part, and an opening 6 on one side of the circular hole 2. The opening 6 passes through the upper fixing clamp 1 in the direction away from the connecting section along the radial side of the circular hole 2. The opening 6 and the circular hole 2 cooperate with the suspension part of the upper fixing clamp 1 to form a "door" shaped structure. The upper fixing clamp 1 on both sides of the opening 6 has corresponding through holes 7. Fastening bolts are installed in the through holes 7, and the upper fixing clamp 1 on both sides of the opening 6 is pressed together by the fastening bolts.

[0021] The pin clamp 3 has a stepped shaft section 16 in the middle of one end. The stepped shaft section 16 includes a concentric and coaxial upper stepped shaft section and a lower stepped shaft section. The upper stepped shaft section is fixedly engaged with the pin clamp 3 through the lower stepped shaft section.

[0022] The upper stepped shaft section is concentrically and coaxially embedded in the circular hole 2. When the fastening bolt is continuously tightened, the opening 6 is compressed by the fastening bolt, and the diameter of the circular hole 2 gradually decreases as the opening 6 is compressed, thus clamping and fixing the upper stepped shaft section.

[0023] During installation, tighten the fastening bolts. The upper fixing clamps 1 on both sides of the opening 6, that is, the two sides of the "door" shaped structure, gradually move closer together, thereby shrinking the round hole 2 and making the round hole 2 fit tightly on the upper stepped shaft section, thus completing the fixing of the pin clamp 3 and the upper fixing clamp 1. During disassembly, loosen the fastening bolts, and the upper fixing clamps 1 on both sides of the opening 6, i.e. the two sides of the "door" shaped structure, gradually move away, thereby opening the round hole 2 and disengaging the round hole 2 from the upper stepped shaft section, thus completing the removal of the pin clamp 3 and the upper fixing clamp 1.

[0024] Preferably, the size of the round hole 2 is slightly larger than that of the upper stepped shaft section, so only a small shrinkage distance is needed to complete the clamping and fixing. Therefore, the width of the opening 6 is also relatively small. The diameter of the through hole is larger than the screw of the fastening bolt and smaller than the nut of the fastening bolt, leaving a certain deformation buffer space. When the fastening bolt is tightened and the opening 6 is shrunk, there is no need to worry about the shrinkage changing the angle of the upper fixing clamp 1 and causing interference with the fastening bolt. The process can be carried out smoothly.

[0025] As a more preferred embodiment 2, the upper fixing clamp 1 located on one side of the circular hole 2 is provided with a cylindrical boss 8. The cylindrical boss 8 extends along the axial direction of the circular hole 2 away from the connecting section of the upper fixing clamp 1. The lower stepped shaft section is provided with a limiting groove 15 corresponding to the cylindrical boss 8. When the upper stepped shaft section is embedded in the circular hole 2, the cylindrical boss 8 is embedded in the limiting groove 15 to form a limiting fit.

[0026] The limiting fit formed by the cylindrical boss 8 embedded in the limiting groove 15 makes the determination of the relative position of the upper fixed clamp 1 and the pin clamp 3 more reliable, and at the same time, prevents the pin clamp 3 from rotating during the dynamic experiment.

[0027] As a preferred embodiment 3, the pin clamp 3 has an inner hole 12 at the middle of the end away from the stepped shaft section 16, and a second screw hole 13 on one side of the pin clamp 3 penetrates into the inner hole 12. The brass block 19 for connecting the wire is embedded in the inner hole 12, and the conductor 10 is embedded in the inner hole 12 and cooperates with the inner hole 12 to press the brass block 19. The fastening screw is threadedly embedded in the second screw hole 13 and cooperates with the inner hole 12 to clamp and fix the conductor 10. There is a side hole 14 on one side of the inner hole 12 through the pin clamp 3, and the wire on the brass block 19 passes out from the side hole 14.

[0028] During installation, first place the brass block 19, then place the conductor 10, so that the conductor 10 contacts and presses against the brass block 19. By tightening the fastening screw in the second screw hole 13, the conductor 10 can be pressed and fixed, ensuring the firmness of the conductor 10. Secondly, by controlling the depth of the conductor 10 in the inner hole 12, it can accommodate the installation of various conductors 10, and control the length of the conductor 10 exposed in the pin clamp 3. The brass block 19 can ensure the conductivity of the conductor 10.

[0029] As a more preferred embodiment 4, the pin clamp 3 located on one side of the inner hole 12 is provided with a square hole 11. The second screw hole 13 passes through the square hole 11 and communicates with the inner hole 12. A square nut 4 is embedded in the square hole 11. After the fastening screw is threadedly engaged with the second screw hole 13, it passes through the square hole 11 and forms a threaded engagement with the square nut 4. Then it passes through the square nut 4 and enters the inner hole 12 through the second screw hole 13.

[0030] The pin clamp 3 is an insulating material, which can be made of photosensitive resin or other materials. However, the material strength is not as good as that of metal. Therefore, a square nut 4 can be added in actual use to prevent the threads of the second screw hole 13 from being damaged by long-term use, to ensure that the fastening screw and the square nut 4 are threaded together, and to extend into the inner hole 12 to press the conductor 10, thus completing the fixing of the conductor 10.

[0031] As a preferred embodiment 5, the pin clamp 3 body can be obtained by 3D printing with insulating material, forming a single piece for easy use. Using insulating material for the pin clamp 3 helps to reduce current loss.

[0032] Preferably, the side hole 14 is much smaller than the inner hole 12. The side hole 14 is mainly used for the passage of wires, but it should not allow objects inside the inner hole 12 to fall out.

[0033] As a preferred embodiment 6, the brass block 19 is a cylinder with a concentric and coaxial mounting groove inside. The groove opening is provided with a third screw hole 17. The side of the brass block 19 is provided with a radially arranged side countersunk hole 18, which communicates with the mounting groove. The end of the wire enters the mounting groove along the side countersunk hole 18. A fastening screw is threaded in the third screw hole 17. The end of the fastening screw cooperates with the mounting groove to clamp and fix the wire. The top of the fastening screw does not exceed the top of the brass block 19.

[0034] To ensure the wire is secure and conductive, the wire is installed in the mounting groove of the brass block 19 by tightening screws to form a conductive fit, which also facilitates installation. The top of the tightening screw does not exceed the top of the brass block 19 to ensure that the top of the brass block 19 is flat, which facilitates contact with the conductor 10 to form conductivity.

[0035] As a more preferred embodiment 7, a plurality of insulating pads 5 are detachably assembled on the side of the brass block 19 away from the conductor 10. A limiting post is provided at the top center of the insulating pad 5, and a limiting groove that fits with the limiting post is provided at the bottom of the insulating pad 5. The limiting post and the adjacent limiting groove form a limiting fit. The side of the brass block 19 away from the conductor 10 is provided with a limiting groove that fits with the limiting post.

[0036] The insulating pad 5 avoids current loss and can meet certain applicability requirements. For example, if the conductor 10 is not long enough, but the exposed length and conductivity still need to be guaranteed, the brass block 19 can be raised by assembling an appropriate number of insulating pads 5 so that it can contact the conductor 10. The limiting post and the limiting groove limit the connection between adjacent insulating pads 5 and between the insulating pad 5 and the brass block 19, so as to avoid the occurrence of displacement or instability during use.

[0037] Preferably, the size of the brass block 19 and the size of the insulating pad 5 are both smaller than the inner hole 12 but larger than the side hole 14, ensuring that the brass block 19 and the insulating pad 5 can be installed into the inner hole 12 but will not come out of the side hole 14.

[0038] The working principle of this utility model: The current is conducted through the wire to the brass block 19, the brass block 19 conducts the current to the conductor 10, and the conductor 10 conducts the current to the experimental object. This invention can reliably fix the relative position between the conductor 10 and the experimental object. At the same time, it can be adapted to conductors 10 of different lengths. It does not require frequent changes of the clamps, which is beneficial to control experimental variables and improve the reliability of experimental results. The pin clamp 3 has good insulation properties, which improves the safety of the experiment.

Claims

1. A clamp structure for current-carrying friction experiments, comprising a base (9), characterized in that An upper fixing clamp (1) is threadedly installed at the middle position of the base (9). An insulating pin clamp (3) is detachably installed at the middle of the upper fixing clamp (1). A conductor (10) is detachably installed at the middle of the pin clamp (3). A brass block (19) is clamped and fixed between the conductor (10) and the pin clamp (3). A wire is detachably electrically connected to the brass block (19). The conductor (10) is electrically connected to the wire through the brass block (19).

2. The clamp structure for current-carrying friction experiment according to claim 1, wherein, One side of the upper fixing clamp (1) is fixedly connected to a threaded sleeve through a connecting section. A threaded post is provided in the middle position of the base (9). The threaded sleeve and the threaded post form a threaded engagement. The upper fixing clamp (1) is suspended and fixed on the threaded sleeve through the connecting section.

3. The clamp structure for current-carrying friction experiment according to claim 2, wherein, The upper fixing clamp (1) has a circular hole (2) in the middle of the suspension part, and an opening (6) on one side of the circular hole (2). The opening (6) passes through the upper fixing clamp (1) in the direction away from the connecting section along the radial side of the circular hole (2). The opening (6) and the circular hole (2) cooperate with the suspension part of the upper fixing clamp (1) to form a "door" shaped structure. The upper fixing clamp (1) on both sides of the opening (6) has corresponding through holes (7). Fastening bolts are installed in the through holes (7), and the upper fixing clamp (1) on both sides of the opening (6) is pressed together by the fastening bolts.

4. The clamp structure for current-carrying friction experiment according to claim 3, wherein, The pin clamp (3) has a stepped shaft section (16) in the middle of one end. The stepped shaft section (16) includes a concentric and coaxial upper stepped shaft section and a lower stepped shaft section. The upper stepped shaft section is fixedly engaged with the pin clamp (3) through the lower stepped shaft section.

5. The clamp structure for current-carrying friction experiment according to claim 4, wherein, The upper stepped shaft section is coaxially embedded in the round hole (2). When the fastening bolt is continuously tightened, the opening (6) is compressed by the fastening bolt. The diameter of the round hole (2) gradually decreases as the opening (6) is compressed and the upper stepped shaft section is clamped and fixed.

6. The clamp structure for current-carrying friction experiment according to claim 5, wherein, The upper fixing clamp (1) located on one side of the circular hole (2) is provided with a cylindrical boss (8). The cylindrical boss (8) extends along the axial direction of the circular hole (2) away from the connecting section of the upper fixing clamp (1). The lower stepped shaft section is provided with a limiting groove (15) corresponding to the cylindrical boss (8). When the upper stepped shaft section is embedded in the circular hole (2), the cylindrical boss (8) is embedded in the limiting groove (15) to form a limiting fit.

7. The clamp structure for current-carrying friction experiment according to claim 6, wherein, The pin clamp (3) has an inner hole (12) in the middle of the end away from the stepped shaft section (16). A second screw hole (13) is provided on one side of the pin clamp (3) and passes through the inner hole (12). The brass block (19) connecting the wire is embedded in the inner hole (12). The conductor (10) is embedded in the inner hole (12) and cooperates with the inner hole (12) to press the brass block (19). The fastening screw is threadedly embedded in the second screw hole (13) and cooperates with the inner hole (12) to clamp and fix the conductor (10). There is a side hole (14) on one side of the inner hole (12) through the pin clamp (3). The wire on the brass block (19) passes through the side hole (14).

8. The clamp structure for current-carrying friction experiment according to claim 7, wherein, The pin clamp (3) located on one side of the inner hole (12) has a square hole (11). The second screw hole (13) passes through the square hole (11) and communicates with the inner hole (12). A square nut (4) is embedded in the square hole (11). After the fastening screw is threadedly engaged with the second screw hole (13), it passes through the square hole (11) and forms a threaded engagement with the square nut (4). Then it passes through the square nut (4) and enters the inner hole (12) through the second screw hole (13).

9. The clamp structure for current-carrying friction experiment according to claim 1, wherein, The brass block (19) is a cylinder. The brass block (19) is provided with a mounting groove in a concentric and coaxial manner. The groove opening is provided with a third screw hole (17). The side of the brass block (19) is provided with a radially arranged side countersunk hole (18). The side countersunk hole (18) communicates with the mounting groove. The end of the wire enters the mounting groove along the side countersunk hole (18). The third screw hole (17) is threaded with a fastening screw. The end of the fastening screw cooperates with the mounting groove to clamp and fix the wire. The top of the fastening screw does not exceed the top of the brass block (19).

10. The clamp structure for current-carrying friction experiment according to claim 9, wherein, The brass block (19) is detachably assembled with several insulating pads (5) on the side away from the conductor (10). A limiting post is provided at the top center of the insulating pad (5), and a limiting groove that fits with the limiting post is provided at the bottom of the insulating pad (5). The limiting post and the adjacent limiting groove form a limiting fit. The brass block (19) is provided with a limiting groove that fits with the limiting post on the side away from the conductor (10).

Images