Cutting table for limiting and equally cutting copper bar

Abstract

The invention discloses a cutting table for limiting and equally cutting a copper bar, relates to the technical field of metal cutting equipment, and aims to solve the problem that an existing cutting table for cutting the copper bar lacks an effective equally-cutting measure. The cutting table comprises an operation table, two symmetrical supporting frames are fixedly connected to the bottom of the operation table, and the copper bar is arranged above the operation table; and a length control module is arranged outside the copper rod, a cutting machine is arranged outside the copper rod, the cutting machine is located above the operation table, a limiting module is arranged outside the cutting machine, and the length control module comprises an extension table. According to the cutting table for limiting and equally cutting the copper bar, accurate and controllable equally cutting can be achieved in the process that the device cuts the copper bar, so that the length of the cut copper bar is effectively controlled, and the device can rapidly and accurately complete machining of the copper bar according to the required specification; and the cutting quality and efficiency are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of metal cutting equipment technology, and in particular to a cutting table for limiting and dividing copper bars. Background Technology

[0002] Copper is a metallic chemical element and one of the earliest metals discovered by humankind. It is a widely used metal and belongs to the heavy metal category. In nature, copper mostly exists as compounds, namely copper minerals. Copper minerals aggregate with other minerals to form copper ore. The mined copper ore is then beneficiated to become copper concentrate with a high copper content.

[0003] The existing copper bar cutting table lacks an effective method for equal division cutting, which leads to errors in the length of the cut copper bars after cutting, requiring further rework cutting of these copper bars, greatly increasing processing time, affecting cutting efficiency, and increasing the waste of materials and resources. Summary of the Invention

[0004] This invention discloses a cutting table for limiting and equally dividing copper rods, aiming to solve the technical problem that existing copper rod cutting tables lack effective measures for equally dividing and cutting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cutting table for equidistantly cutting copper rods includes an operating table. Two symmetrical support frames are fixedly connected to the bottom of the operating table. A copper rod is placed above the operating table, and a length control module is installed on the outside of the copper rod. A cutting machine is placed outside the copper rod, located above the operating table, and a limit module is installed on the outside of the cutting machine. The length control module includes an extension table, the bottom of which is slidably connected to the upper side of the operating table. A receiving table is slidably connected to the outside of the extension table, and the bottom of the receiving table is fixedly connected to the upper side of the operating table. A stabilizing table is installed outside the copper rod. A closed plate is installed on the side of the stabilizing table away from the cutting machine, and a contact sensor is installed on the closed plate, with the contact sensor abutting against the side of the copper rod opposite to it.

[0006] In a preferred embodiment, both the extension platform and the receiving platform are fixedly connected to two symmetrical bosses on the outside. A round rod and a threaded rod are respectively provided on the two bosses located on the same side, and a scale line is opened on the upper side of the operating platform. A pointer is mounted outside the scale lines, and the pointer is fixedly connected to the side opposite to the extension platform. A notch is formed on the extension platform, and the inner wall of the notch is fixedly connected to the outside of the stabilizing platform. A motor is fixedly connected to the outside of the stabilizing platform, and the output end of the motor is connected to the outside of the closed disc via a coupling. Three circumferentially spaced grooves are formed on the side of the stabilizing platform away from the closed disc. Clamping rods are slidably connected within each groove, and each clamping rod is located outside the copper rod. A roller is mounted on the side of each clamping rod closest to the copper rod, and the outer surface of each roller contacts the outer surface of the copper rod. A short shaft is fixedly connected to the side of each of the three clamping rods away from the stabilizing platform. A rotating disk is mounted outside the short shaft, and the rotating disk is movably connected to the side opposite to the stabilizing platform. The outer surface of the rotating disk is slidably connected to the inner wall of the notch, and three circumferentially spaced curved grooves are formed on the rotating disk, the inner walls of which are all connected to the inner wall of the notch on the same side. The short shaft is externally slidably connected; a coil spring is fixedly connected to the inner wall of the rotating disk, and the end of the coil spring away from the rotating disk is fixedly connected to the outside of the stable platform. The coil spring is located outside the copper rod, and a motor is fixedly connected to the outside of the stable platform. The output end of the motor is connected to a gear through a coupling. An arc-shaped rack is fixedly connected to the outside of the rotating disk, and the arc-shaped rack meshes with the gear. A support platform is slidably connected to the upper side of the extension platform. The support platform is fixedly connected to the side opposite to the receiving platform. The support platform and the cutting machine are located on the same plane, and a slide groove is fixedly connected to the side of the support platform near the stable platform. A movable block is slidably connected in the slide groove. Two symmetrical rollers are movably connected to the upper side of the movable block. The outside of the rollers is in contact with the outside of the copper rod. Two small holes are opened on the outside of the slide groove, and positioning bolts are set in the small holes. The positioning bolts are in contact with the side opposite to the movable block.

[0007] In a preferred embodiment, the limiting module includes a stand, the bottom of which is fixedly connected to the upper side of the receiving platform. A circular opening is provided on the stand, and a lead screw is installed within the opening. A hanger is movably connected to the bottom of the lead screw. A slot is provided on the upper side of the stand, and a guide rod is slidably connected within the slot. The bottom of the guide rod is fixedly connected to the upper side of the hanger. A mounting plate is fixedly connected to the inner wall of the hanger. A slit is provided on the mounting plate, and a column is slidably connected within the slit. A rubber clamping plate is fixedly connected to the bottom of the column, and the bottom of the rubber clamping plate is in contact with the outside of the copper rod. Two symmetrical springs are fixedly connected to the upper side of the mounting plate, and the ends of the springs furthest from the mounting plate are fixedly connected to the outside of the column. Two symmetrical linear racks are fixedly connected to the outside of the column. Two symmetrical bosses are fixedly connected to the upper side of the rod. Short rods are movably connected to each boss. Gears are fixedly connected to the outside of each short rod. Both gears mesh with a linear rack on the same side. A lever arm is movably connected to the outside of each short rod. The inner wall of the lever arm is fixedly connected to the outside of the gear. A rectangular opening is opened on each lever arm. A shaft is fixedly connected to the inside of each rectangular opening. A rotating rod is movably connected to the outside of each shaft. The rotating rod is located inside the rectangular opening. A coil spring is fixedly connected to the outside of each shaft. A fixing ring is fixedly connected to the end of the coil spring away from the shaft. The fixing ring is fixedly connected to the side of the lever arm opposite to the outside. A rubber clamping plate is fixedly connected to the side of each rotating rod near the copper rod. The outside of the rubber clamping plate is in contact with the outside of the copper rod.

[0008] As can be seen from the above, the cutting table for limiting and dividing copper rods provided by the present invention enables the device to achieve precise and controllable equal division cutting during the cutting process of copper rods, thereby effectively controlling the length of the cut copper rods. This allows the device to quickly and accurately complete the processing of copper rods according to the required specifications, significantly improving the cutting quality and efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a cutting table for limiting and equally dividing copper rods according to the present invention.

[0010] Figure 2 This is a side view of the cutting table for limiting and dividing copper rods according to the present invention.

[0011] Figure 3 This is a schematic diagram of the length control module structure of a cutting table for limiting and equally dividing copper rods, as proposed in this invention.

[0012] Figure 4 This is a schematic diagram of the stabilizing platform structure of a cutting table for limiting and equally dividing copper rods, as proposed in this invention.

[0013] Figure 5This is a schematic diagram of the groove structure of a cutting table for limiting and equally dividing copper rods according to the present invention.

[0014] Figure 6 This is a schematic diagram of the limiting module structure of a cutting table for equally dividing and cutting copper rods, as proposed in this invention.

[0015] Figure 7 This is a schematic diagram of the mounting plate structure of a cutting table for limiting and equally dividing copper rods according to the present invention.

[0016] In the diagram: 1. Operating table; 2. Support frame; 3. Copper rod; 4. Cutting machine; 5. Length control module; 501. Extension table; 502. Receiving table; 503. Stabilizing table; 504. Boss; 505. Round rod; 506. Threaded rod; 507. Scale line; 508. Pointer; 509. Support platform; 510. Groove; 511. Clamping rod; 512. Roller one; 513. Short shaft; 514. Rotating disk; 515. Curved groove; 516. Coil spring one; 517. Motor one; 518. Enclosed disk; 519. Contact sensor; 520. Motor 2; 521, Gear 1; 522, Arc rack; 523, Slide groove; 524, Movable block; 525, Roller 2; 526, Positioning bolt; 6, Limit module; 601, Stand; 602, Lead screw; 603, Hanger; 604, Guide rod; 605, Mounting plate; 606, Column; 607, Spring; 608, Linear rack; 609, Gear 2; 610, Lever arm; 611, Rotating rod; 612, Shaft; 613, Coil spring 2; 614, Fixing ring; 615, Rubber clamping plate 1; 616, Rubber clamping plate 2. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The cutting table for limiting and equally dividing copper rods disclosed in this invention is mainly applied to scenarios where existing copper rod cutting tables lack effective measures for equally dividing and cutting.

[0019] Reference Figures 1-7A cutting table for equidistantly cutting copper rods includes an operating table 1. Two symmetrical support frames 2 are bolted to the bottom of the operating table 1. A copper rod 3 is positioned above the operating table 1, and a length control module 5 is installed on the outside of the copper rod 3. A cutting machine 4 is positioned on the outside of the copper rod 3, located above the operating table 1, and a limit module 6 is installed on the outside of the cutting machine 4. The length control module 5 includes an extension table 501, the bottom of which is slidably connected to the upper side of the operating table 1. A receiving table 502 is slidably connected to the outside of the extension table 501, the bottom of which is bolted to the upper side of the operating table 1. A stabilizing table 503 is installed on the outside of the copper rod 3. A sealing plate 518 is installed on the side of the stabilizing table 503 away from the cutting machine 4, and a contact sensor 519 is installed on the sealing plate 518, with the contact sensor 519 abutting against the opposite side of the copper rod 3.

[0020] Specifically, the device utilizes the length control module 5 to achieve precise and controllable equal-division cutting during the cutting process of the copper rod 3, thereby effectively controlling the length of the cut copper rod. This allows the device to quickly and accurately complete the processing of the copper rod 3 according to the required specifications, significantly improving cutting quality and efficiency.

[0021] Reference Figure 3 , Figure 4 and Figure 5In a preferred embodiment, both the extension platform 501 and the receiving platform 502 are externally connected by bolts to two symmetrical bosses 504. Two bosses 504 on the same side are respectively provided with a round rod 505 and a threaded rod 506. A scale line 507 is provided on the upper side of the operating platform 1. A pointer 508 is provided on the outside of the scale line 507, and the side of the pointer 508 opposite to the extension platform 501 is bolted to it. A notch is provided on the extension platform 501, and the inner wall of the notch is bolted to the outside of the stabilizing platform 503. A motor 517 is bolted to the outside of the stabilizing platform 503, and the output end of the motor 517 is connected to the enclosed disc 518 via a coupling. For external connection, the stabilizing platform 503 has three circumferentially equidistant grooves 510 on the side away from the closed disk 518. Each groove 510 has a slidably connected clamping rod 511. The clamping rods 511 are all located outside the copper rod 3, and each clamping rod 511 has a roller 512 on the side closest to the copper rod 3. The outer side of each roller 512 is in contact with the outer side of the copper rod 3. The side of each of the three clamping rods 511 away from the stabilizing platform 503 is bolted to a short shaft 513. A rotating disk 514 is located outside the short shaft 513. The side of the rotating disk 514 opposite to the stabilizing platform 503 is rotatably connected via a bearing. The outer side of the rotating disk 514 slides against the inner wall of the notch. The rotating disk 514 is connected to a rotating disk 514, which has three circumferentially equidistant curved grooves 515. The inner walls of the curved grooves 515 are slidably connected to the outer side of the short shaft 513 on the same side. A coil spring 516 is bolted to the inner wall of the rotating disk 514. The end of the coil spring 516 away from the rotating disk 514 is bolted to the outer side of the stable platform 503. The coil spring 516 is located outside the copper rod 3. A motor 520 is bolted to the outer side of the stable platform 503. The output end of the motor 520 is connected to a gear 521 via a coupling. An arc-shaped rack 522 is bolted to the outer side of the rotating disk 514. The arc-shaped rack 522 meshes with the gear 521. The upper side of the extension table 501 is slidably connected to a support table 509. The support table 509 is bolted to the side opposite to the receiving table 502. The support table 509 and the cutting machine 4 are located on the same plane. The side of the support table 509 near the stabilizing table 503 is bolted to a slide groove 523. A movable block 524 is slidably connected in the slide groove 523. The upper side of the movable block 524 is rotatably connected to two symmetrical rollers 525 through bearings. The outer side of the rollers 525 is in contact with the outer side of the copper rod 3. Two small holes are opened on the outer side of the slide groove 523. A positioning bolt 526 is set in each of the small holes. The positioning bolt 526 is in contact with the side opposite to the movable block 524.

[0022] In specific application scenarios, the length control module 5 is mainly used for the length control link in the length control process. Specifically, the length control module 5 uses the extension table 501, the receiving table 502, the threaded rod 506, the scale line 507, and the pointer 508 to precisely control the length of the copper rod 3 extending from the cutting position of the cutting machine 4. The blocking of the copper rod 3 by the enclosed plate 518 and the contact between the copper rod 3 and the contact sensor 519 ensure that the copper rod 3 is cut to the required length. The curved groove 515, the short shaft 513, the movable block 524, and the roller 525 ensure that the copper rod 3 remains parallel during the cutting process, avoiding skewing, effectively ensuring that the cutting length of the copper rod 3 is not affected, and improving the accuracy of length control. The slide 523, the positioning bolt 526, the curved groove 515, and the cutting groove 510 enable the device to fix and control copper rods 3 of different diameters, thereby enabling the device to cut copper rods 3 of different sizes and improving the versatility of the device.

[0023] Reference Figure 6 and Figure 7In a preferred embodiment, the limiting module 6 includes a support frame 601. The bottom of the support frame 601 is bolted to the upper side of the receiving platform 502. A circular opening is provided on the support frame 601, and a lead screw 602 is disposed within the circular opening. The bottom of the lead screw 602 is rotatably connected to a hanger 603 via a bearing. A slot is provided on the upper side of the support frame 601, and a guide rod 604 is slidably connected within the slot. The bottom of the guide rod 604 is bolted to the upper side of the hanger 603. A mounting plate is bolted to the inner wall of the hanger 603. 605. A notch is provided on the mounting plate 605, and a column 606 is slidably connected within the notch. A rubber clamping plate 615 is bolted to the bottom of the column 606. The bottom of the rubber clamping plate 615 is in contact with the outside of the copper rod 3. Two symmetrical springs 607 are bolted to the upper side of the mounting plate 605. The ends of the springs 607 away from the mounting plate 605 are bolted to the outside of the column 606. Two symmetrical linear racks 608 are bolted to the outside of the column 606. On the upper side of component 05, two symmetrical bosses are bolted together. Each boss is rotatably connected to a short rod via a bearing. Gears 609 are bolted to the outside of each short rod. Both gears 609 mesh with a linear rack 608 on the same side. A lever arm 610 is rotatably connected to the outside of each short rod via a bearing. The inner wall of the lever arm 610 is bolted to the outside of the gears 609. Each lever arm 610 has a rectangular opening, and a shaft 612 is bolted to the inside of each rectangular opening. The outside of the shaft 612... Each of the two rotating rods 611 is rotatably connected by bearings. The rotating rods 611 are all located inside the rectangular opening. The outer side of the shaft 612 is bolted to the coil spring 613. The end of the coil spring 613 away from the shaft 612 is bolted to the fixing ring 614. The side of the fixing ring 614 opposite to the outer side of the lever arm 610 is bolted to the two rotating rods 611. The side of the two rotating rods 611 near the copper rod 3 is bolted to the rubber clamping plate 616. The outer side of the rubber clamping plate 616 is in contact with the outer side of the copper rod 3.

[0024] In specific application scenarios, the limiting module 6 is mainly used for the limiting link in the limiting process. That is, the limiting module 6 uses the column 606, gear 2 609 and lever arm 610 to limit the surface of the copper rod 3 from above and laterally through the rubber clamping plate 1 615 and rubber clamping plate 2 616. This prevents the copper rod 3 from deviating due to force when the cutting machine 4 on the device cuts it, thus improving the cutting effect of the device. Through the rotating rod 611, coil spring 2 613 and fixing ring 614, the rubber clamping plate 2 616 can still stick tightly to the surface of the copper rod 3 when contacting copper rods 3 of different diameters by rotating, thus improving the limiting effect of the device.

[0025] Working principle: After placing the copper rod 3 on the receiving platform 502, gently push the copper rod 3 to insert one end into the stabilizing platform 503. Start motor 1 517, which drives the sealing disk 518 to rotate and complete the sealing of the stabilizing platform 503. Start motor 2 520, which drives gear 1 521 meshing with the arc-shaped rack 522 to rotate, causing the rotating disk 514 to rotate and push the short shaft 513 connected to the clamping rod 511 towards the center through the curved groove 515. The center moves, thus lifting one end of the copper rod 3 and clamping it onto the axis of the stabilizing platform 503. Loosening the positioning bolt 526, the movable block 524 is raised, causing the roller 525 to lift the middle of the copper rod 3, keeping it parallel. Tightening the positioning bolt 526, the threaded rod 506 is rotated, causing each extension platform 501 to extend or retract within the receiving platform 502. The pointer 508 indicates the required cutting length of the copper rod 3 on the scale line 507. Controlling the cutting length, gently push the copper rod 3 so that one end of the copper rod 3 near the closed disk 518 contacts the contact sensor 519 on the closed disk 518. After the contact sensor 519 contacts the copper rod 3, the cutting machine 4 is powered on and started to cut the copper rod 3 into equal sections. Before the cutting machine 4 starts cutting, rotate the lead screw 602 so that the lead screw 602 pushes the hanger 603 downward, thereby making the rubber clamping plate 615 contact the surface of the copper rod 3. As the hanger 603 moves downward... As the moving mounting plate 605 continues to descend, the column 606 moves upward against the tension of the spring 607, causing the linear rack 608 to drive the gear 609 to rotate, causing the lever arm 610 to rotate in the direction of the copper rod 3, bringing the rubber clamping plate 616 close to the copper rod 3. After the rubber clamping plate 616 contacts the copper rod 3, the shaft 612 drives the rotating rod 611 to overcome the torque of the coil spring 613 and completely fit against the surface of the copper rod 3. At this time, the lever arm 610 and the column 606 no longer move.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting table for limiting and dividing copper rods, comprising an operating table (1), characterized in that, The bottom of the operating table (1) is fixedly connected to two symmetrical support frames (2). A copper rod (3) is set above the operating table (1), and a length control module (5) is set outside the copper rod (3). A cutting machine (4) is set outside the copper rod (3). The cutting machine (4) is located above the operating table (1), and a limit module (6) is set outside the cutting machine (4). The length control module (5) includes an extension table (501). The bottom of the extension table (501) is connected to the operating table. The upper side of the worktable (1) is slidably connected, and the outer side of the extension table (501) is slidably connected to the receiving table (502). The bottom of the receiving table (502) is fixedly connected to the upper side of the worktable (1). The copper rod (3) is provided with a stabilizing table (503). The side of the stabilizing table (503) away from the cutting machine (4) is provided with a closed plate (518). The closed plate (518) is provided with a contact sensor (519). The contact sensor (519) is attached to the side of the copper rod (3) opposite to it.

2. The cutting table for limiting and equally dividing copper rods according to claim 1, characterized in that, Both the extension platform (501) and the receiving platform (502) are fixedly connected to two symmetrical bosses (504). A round rod (505) and a threaded rod (506) are respectively provided on the two bosses (504) on the same side, and a scale line (507) is opened on the upper side of the operating table (1). A pointer (508) is provided on the outside of the scale line (507), and the pointer (508) is fixedly connected to the side opposite to the extension platform (501).

3. The cutting table for limiting and equally dividing copper rods according to claim 2, characterized in that, The extension platform (501) has a notch, the inner wall of the notch is fixedly connected to the outside of the stabilizing platform (503), the outside of the stabilizing platform (503) is fixedly connected to a motor (517), the output end of the motor (517) is connected to the outside of the closed plate (518) through a coupling, the side of the stabilizing platform (503) away from the closed plate (518) has three circumferentially distributed grooves (510), each groove (510) is slidably connected to a clamping rod (511), the clamping rods (511) are all located outside the copper rod (3), and each clamping rod (511) is provided with a roller (512) on the side of the clamping rod (511) close to the copper rod (3), the outside of the roller (512) is in contact with the outside of the copper rod (3).

4. The cutting table for limiting and equally dividing copper rods according to claim 3, characterized in that, Each of the three clamping rods (511) is fixedly connected to a short shaft (513) on the side away from the stabilizing platform (503). The same rotating disk (514) is provided on the outside of the short shaft (513). The rotating disk (514) is movably connected to the side opposite to the stabilizing platform (503). The outside of the rotating disk (514) is slidably connected to the inner wall of the notch. Three circumferentially distributed curved grooves (515) are provided on the rotating disk (514). The inner wall of each curved groove (515) is slidably connected to the outside of the short shaft (513) on the same side.

5. A cutting table for limiting and equally dividing copper rods according to claim 4, characterized in that, A coil spring (516) is fixedly connected to the inner wall of the rotating disk (514). The end of the coil spring (516) away from the rotating disk (514) is fixedly connected to the outside of the stabilizing platform (503). The coil spring (516) is located outside the copper rod (3). A motor (520) is fixedly connected to the outside of the stabilizing platform (503). The output end of the motor (520) is connected to a gear (521) through a coupling. An arc-shaped rack (522) is fixedly connected to the outside of the rotating disk (514). The arc-shaped rack (522) meshes with the gear (521).

6. A cutting table for limiting and equally dividing copper rods according to claim 2, characterized in that, The upper side of the extension platform (501) is slidably connected to a support platform (509). The support platform (509) is fixedly connected to the side opposite to the receiving platform (502). The support platform (509) and the cutting machine (4) are located on the same plane. The side of the support platform (509) near the stabilizing platform (503) is fixedly connected to a slide groove (523). A movable block (524) is slidably connected in the slide groove (523). Two symmetrical rollers (525) are movably connected to the upper side of the movable block (524). The outer side of the rollers (525) is in contact with the outer side of the copper rod (3). Two small holes are opened on the outer side of the slide groove (523). A positioning bolt (526) is provided in each of the small holes. The positioning bolt (526) is attached to the side opposite to the movable block (524).

7. A cutting table for limiting and equally dividing copper rods according to claim 1, characterized in that, The limiting module (6) includes a stand (601), the bottom of which is fixedly connected to the upper side of the receiving platform (502). A circular opening is provided on the stand (601), and a lead screw (602) is provided inside the circular opening. A hanger (603) is movably connected to the bottom of the lead screw (602). A slot is provided on the upper side of the stand (601), and a guide rod (604) is slidably connected inside the slot. The bottom of the guide rod (604) is fixedly connected to the upper side of the hanger (603).

8. A cutting table for limiting and equally dividing copper rods according to claim 7, characterized in that, The inner wall of the hanger (603) is fixedly connected to an installation plate (605). The installation plate (605) has a cutout, and a column (606) is slidably connected inside the cutout. A rubber clamping plate (615) is fixedly connected to the bottom of the column (606). The bottom of the rubber clamping plate (615) is in contact with the outside of the copper rod (3). Two symmetrical springs (607) are fixedly connected to the upper side of the installation plate (605). The ends of the springs (607) away from the installation plate (605) are fixedly connected to the outside of the column (606).

9. A cutting table for limiting and equally dividing copper rods according to claim 8, characterized in that, The column (606) is externally fixedly connected to two symmetrical linear racks (608), and the upper side of the mounting plate (605) is fixedly connected to two symmetrical bosses. Each boss is movably connected to a short rod, and each short rod is externally fixedly connected to a gear (609). Both gears (609) mesh with the linear racks (608) on the same side, and both short rods are externally movably connected to a lever arm (610). The inner wall of the lever arm (610) is externally fixedly connected to the gear (609).

10. A cutting table for limiting and equally dividing copper rods according to claim 9, characterized in that, Both lever arms (610) have rectangular openings, and shafts (612) are fixedly connected inside the rectangular openings. Rotating rods (611) are movably connected to the outside of the shafts (612). The rotating rods (611) are located inside the rectangular openings. A coil spring (613) is fixedly connected to the outside of the shafts (612). A fixing ring (614) is fixedly connected to the end of the coil spring (613) away from the shaft (612). The fixing ring (614) is fixedly connected to the side of the lever arm (610) opposite to the outside. A rubber clamping plate (616) is fixedly connected to the side of the two rotating rods (611) near the copper rod (3). The outside of the rubber clamping plate (616) is in contact with the outside of the copper rod (3).

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