A wiring firmness test bench

Abstract

The present invention discloses a wiring firmness test bench, which belongs to the technical field of electrical wiring firmness testing, and includes a clamping component for clamping the connection end of the wire, and a connecting component for connecting the other end of the wire. The clamping component can be moved vertically upward to pull the wire, and the clamping component includes a pair of pressing blocks arranged opposite to each other, and the two pressing blocks are each driven by a thread pair to move closer to or away from each other; the connecting component includes a rotating table located below the two pressing blocks, and the rotating table is rotatably mounted on a bearing plate in the stand, and the center of the rotating table has a mounting hole for the other end of the wire to pass through and fix, and a plurality of threading holes also arranged on the rotating table are provided outside the mounting hole, and a counterweight block is provided below the threading hole, and the counterweight block is fixed on the other end of the wire to straighten the wire. The wiring firmness test bench can quickly and accurately test the wiring firmness.

Description

Technical Field

[0001] The invention relates to the technical field of electrical wiring firmness testing, in particular to a wiring firmness testing platform. Background Art

[0002] In the terminal block test, there is no mature test device on the market for testing the accidental loosening or damage of the wires in the terminal block, that is, the bending and pulling out test of the wires. Generally speaking, the test is mainly carried out through homemade devices of various companies, but basically during the test, it is impossible to accurately test the connection firmness during the rotation process, and the rotation of the wires cannot be well controlled. The terminals on the wires are unstable, which leads to the easy fall-off during the pull-out, pulling and bending tests.

[0003] In addition, due to the lack of special equipment, when using some traditional pull-out test equipment, for special structures such as wire terminals, not only is the overall test operation cumbersome, but it is also difficult to tighten and easy to slip out. Therefore, it is necessary to design an automatic integrated special test equipment to solve the above problems. Summary of the invention

[0004] In view of the introduction to the above technical status quo, the purpose of the present invention is to provide a wiring firmness test bench with a simple and compact structure, easy to manufacture, convenient operation, efficient and reliable testing, which can better solve the technical problem in the prior art that there is no special test equipment for wiring firmness testing.

[0005] To achieve the above-mentioned purpose, the present invention adopts a wiring firmness test bench, including a clamping component for clamping the connecting end of the wire, and a connecting component for connecting the other end of the wire, the clamping component can be moved vertically upward to pull the wire, the clamping component includes a pair of pressing blocks arranged opposite to each other, and the two pressing blocks are each driven by a thread pair to move closer to or away from each other; the connecting component includes a rotating table located below the two pressing blocks, the rotating table is rotatably mounted on a bearing plate in the stand, the center of the rotating table has a mounting hole for the other end of the wire to pass through and be fixed, and a plurality of threading holes also arranged on the rotating table are provided in addition to the mounting hole, a counterweight block is provided below the threading hole, and the counterweight block is fixed on the other end of the wire to straighten the wire.

[0006] Furthermore, the present invention also includes a plurality of guide columns vertically slidably mounted on the platform, a connecting plate is vertically fixed to each end of the guide column, the pressure block is horizontally slidably mounted on the lower connecting plate, and a screw rod is threadedly mounted on the center of the lower connecting plate, the screw rod is vertically mounted on the platform for self-rotation in situ, so that the two connecting plates and the guide columns move up or down together.

[0007] Furthermore, a pair of baffles arranged at intervals are fixed at the bottom of the lower connecting plate, each baffle is threadedly penetrated by a horizontally arranged fastening bolt, a support is fixed between the two baffles, and the bottom end surface of the support is horizontally slidably mounted with the pressure block, and when the two fastening bolts approach each other, they push the corresponding pressure blocks together to clamp the connecting end of the wire.

[0008] Furthermore, a hand wheel is coaxially fixed on the screw rod, and the hand wheel is used to manually rotate the screw rod when held by hand; the guide column and the screw rod are axially slidably matched with the stand, and are all installed with a shaft sleeve.

[0009] Furthermore, after the bottom end of the screw rod is threadedly fitted through the lower connecting plate, a worm wheel is coaxially fixed thereto, the worm wheel is meshed with a worm rotatably installed under the lower connecting plate, a transmission stud is coaxially fixed thereto at each end of the worm, a sliding arm is threadedly fitted on the transmission stud, one end of the sliding arm is horizontally slidably installed on the bottom surface of the lower connecting plate, and the other end of the sliding arm is fixedly connected to the pressure block, and when the screw rod is rotated to move the lower connecting plate up, the synchronous rotation of the worm and the transmission stud causes the two sliding arms to move closer to each other.

[0010] Furthermore, each of the two ends of the worm has a connecting column integrally therewith, the connecting column is rotatably mounted in a mounting seat, the mounting seat is fixed on the lower connecting plate, and a pressure plate having an end surface size larger than that of the connecting column is coaxially fixed to the free end of the connecting column;

[0011] An annular connecting cover is fixed to the end of the transmission stud opposite to the free end, and a slide plate and a disc spring are axially slidably installed in the connecting cover, as well as the pressure plate axially slidingly extended into the connecting cover; a locking bolt screwed into the connecting cover is threadedly installed on the side of the connecting cover facing the transmission stud, and the locking bolt is pressed and contacted on the slide plate so that the part of the pressure plate exposed from the connecting column is firmly fitted together with the inner wall of the connecting cover.

[0012] Furthermore, the locking bolts are arranged in a circular array around the transmission stud, and the nuts of the locking bolts are processed into the structure of a cylindrical gear. One end of the locking bolts located in the connecting cover is rotatably installed in the slide plate and cannot be separated from the slide plate. A guide block is fixed to the side wall of the slide plate, and the guide block is slidably installed in the inner wall of the connecting cover along a direction parallel to the axial direction of the transmission stud; a locking nut cover is threadedly engaged with one end of the transmission stud on the outside of the connecting cover, and the inner wall of the through hole of the locking nut cover for the transmission stud to pass through is processed into the structure of an inner gear ring, and the inner gear ring is meshed with all cylindrical gears.

[0013] Furthermore, a compressible spring is provided between the locking nut and the connecting cover; a plurality of disc springs are provided, and all the disc springs are arranged concentrically with each other.

[0014] Furthermore, wear-resistant friction discs are fixed on an end surface of the pressure plate close to the connecting column and on an inner wall of the connecting cover opposite to the end surface, and the two wear-resistant friction discs are coaxially fitted and kept in contact with each other.

[0015] Furthermore, the rotating table is a circular boss structure, and a plurality of rolling bearings are arranged around the rotating table. The rolling bearings are rotatably mounted on the bearing plate, and one side of the rolling bearing is located on the annular step surface of the circular boss structure, and is in rolling and tangential contact with the side wall of the upper circular table of the circular boss structure; an outer gear ring is coaxially fixed at the bottom end of the rotating table, and the outer gear ring extends to the bottom of the bearing plate. The outer gear ring is meshed with a driving gear through a reduction gear, and the driving gear is fixed on the main shaft of a speed regulating AC motor, and the speed regulating AC motor is fixed in the stand.

[0016] In general, the present invention has the advantages of simple structure, convenient operation, labor-saving and time-saving, high reliability and low cost, and the product has stable installation and precise control, so it has good practicality, is easy to promote and apply, and has great practical value.

[0017] Specifically, the present invention has a simple and compact structure, and utilizes the movement of the screw rod and the relative movement of the pressure block to clamp the terminal of the wire and pull it vertically. A rotating table is specially provided to install the other end of the wire for pulling test. At the same time, the rotating table can also rotate, and with the help of the pulling force of the counterweight block on the other end of the wire, it is straightened and then rotated for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following are auxiliary illustrations for explaining some specific embodiments of the present invention. The drawings described are mainly the principles of the specific operation execution structures or methods of some embodiments of the present invention. However, this does not mean that the physical structure or operation steps of the present invention can only be as shown in the drawings.

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 It is a partial enlarged structural schematic diagram of the clamping component in the present invention;

[0021] Figure 3 is another partial enlarged structural schematic diagram of the clamping component in the present invention;

[0022] Figure 4 yes Figure 3 A specific structural cross-sectional view at A in the structure shown;

[0023] Figure 5 This is a top view of the turntable.

[0024] In the figure, the stand 1, the bearing plate 2, the rotating table 3, the mounting hole 301, the threading hole 302, the wire 4, the pressure block 5, the lower connecting plate 6, the hand wheel 7, the screw 8, the guide column 9, the sleeve 10, the speed sensor 11, the speed regulating AC motor 12, the control box 13, the baffle 14, the support 15, the fastening bolt 16, the worm gear 17, the worm 18, the sliding arm 19, the transmission stud 20, the mounting seat 21, the pressure plate 22, the disc spring 23, the slide plate 24, the connecting cover 25, the locking nut cover 26, the locking bolt 27, the cylindrical gear 28, the inner gear ring 29, the spring piece 30, the guide block 31, the wear-resistant friction disk 32, the connecting column 33, the rolling bearing 34, the outer gear ring 35, and the driving gear 36. DETAILED DESCRIPTION

[0025] The embodiments of the present invention will be fully described below, and some core features of the embodiments will be specifically shown in the accompanying drawings, wherein the same or similar reference numerals in the drawings represent the same or similar technical features, or structures or steps or processes with similar functions. Other embodiments replaced by ordinary technicians based on these embodiments without the need for creative work also belong to the protection scope of the present invention.

[0026] See also Figure 1-Figure 2 A wiring firmness test bench shown in the figure mainly includes a clamping component for clamping the connecting end of the wire 4, and a connecting component for connecting the other end of the wire 4, that is, the connecting component is connected to the bottom end of the wire 4, and these components are mounted on a stand 1 made of an aluminum alloy frame. When in use, the clamping component can be moved vertically upward, so that the wire 4 can be pulled to achieve the tensile strength test of the wire 4 with the connecting end as a whole, to observe whether it will fall off or break. Specifically, the clamping component includes a pair of pressing blocks 5 arranged opposite to each other, the surface of the pressing block 5 has a transverse anti-slip texture, and a center line is drawn at the center of the back to facilitate alignment when clamping the product. The two pressing blocks 5 are each driven by a threaded pair to move closer to or away from each other. When they move closer, the wire 4 located therebetween is Figure 2 In addition, the connecting component in this embodiment includes a rotating table 3 located below the two pressing blocks 5, and the rotating table 3 is rotatably mounted on the bearing plate 2 in the stand 1, as shown in FIG. Figure 5, there is a mounting hole 301 in the center of the rotating table 3 for the other end of the wire 4 to pass through and be fixed. Specifically, some clips can be used to clamp the end of the wire 4, or a component like a terminal can be used to fix the end of the wire 4, so that the bottom end of the wire 4 will not be completely pulled out from the mounting hole 301, so that the wire 4 can be pulled out. In addition to the pulling test of the wire 4, the wiring firmness test bench in this embodiment can also conduct a winding or swinging, or rotating experiment after the connection end of the wire 4 is fixed, that is, a so-called bending test, to test whether the connected wire 4 will be separated from its terminal when it is bent while rotating in a circle. In specific practice, a number of threading holes 302 that are also arranged on the rotating table 3 can be provided in addition to the mounting hole 301. One of the ways to make the threading holes 302 can be to provide a rotatable sleeve, the shaft hole of the sleeve is for the wire to pass through, and the sleeve can be rotatably mounted on the rotating table 3 through a bearing. It also includes a counterweight block. When operating, a counterweight block needs to be set below the threading hole 302, and the counterweight block is fixed on the other end of the wire 4, that is, Figure 1 The bottom end of the wire 4 shown is straightened so that the wire 4 rotates with the rotation of the rotating table 3 to test the reliability of the connection with the connecting terminal. The rotation speed of the rotating table 3 can be detected in real time by setting a rotation speed sensor 11 on one side of the stand 1, such as infrared breakpoint triggering, counting the number of rotations, and realizing accurate adjustment of the rotation speed. The corresponding electrical control components can be centrally installed in a control box 13 on the upper part of one side of the stand 1. The control panel on the surface of the control box 13 can adjust the rotation speed, set the number of rotations and the rotation time, so as to realize full automatic control of the entire equipment.

[0027] As one of the specific implementation structures, such as Figure 1-3 , this embodiment also includes a plurality of guide posts 9 vertically slidably mounted on the stand 1. The guide posts 9 are cylindrical rods, and a connecting plate is vertically fixed to the two ends of the guide posts 9. The two connecting plates make the guide posts 9 and the guide posts 9 an integral structure that moves up and down synchronously. More specifically, the pressing block 5 is horizontally slidably mounted on the lower connecting plate 6, and a motorized screw rod 8 is mounted in a central threaded manner on the lower connecting plate 6. The screw rod 8 serves as a driving component for the vertical movement of the above-mentioned integral structure, that is, the screw rod 8 is vertically mounted on the stand 1 in a self-rotating manner in situ, so that the two connecting plates and the guide posts 9 can move upward or downward together, with stable operation and reliable structure.

[0028] like Figure 1-Figure 2As shown, at the bottom of the lower connecting plate 6, a pair of baffles 14 arranged at intervals are specially fixed. The pair of baffles 14 can be set on the left and right. Each baffle 14 is threadedly penetrated by a horizontally arranged fastening bolt 16. At the same time, a support 15 is fixed between the two baffles 14. The top surface of the support 15 is fixed to the lower connecting plate 6 or directly fixed to the baffle 14 as a whole, and the pair of pressing blocks 5 mentioned above are horizontally slidably installed on the bottom surface of the support 15. During operation, when the two fastening bolts 16 are close to each other, they push the corresponding pressing blocks 5 together, thereby clamping the connecting end of the wire 4 for pulling and rotating experiments. In order to facilitate the manual active rotation of the screw rod 8, as shown in FIG. Figure 2 A hand wheel 7 is coaxially fixed on the screw rod 8. When the hand wheel 7 is used to hold, the screw rod 8 can be manually rotated, and then the terminal at the top of the connecting wire 4 is pulled upward. It is particularly practical for small wires 4, and the strength can be intuitively perceived by manpower. When the lower connecting plate 6 rises to the set height, if the wire 4 and its terminal have not fallen off, it means that the pulling test is qualified. In the specific production, in order to make the lower connecting plate 6 move up or down stably, the guide column 9 and the screw rod 8 are installed at the axial sliding fit with the stand 1 with a sleeve 10. The sleeve 10 is quenched and has a higher hardness. The sleeve 10 is used to improve the accuracy of axial movement and facilitate replacement and maintenance without having to replace the corresponding components as a whole.

[0029] As another better implementation structure for clamping the connecting terminal on the wire 4, Figure 3 As shown, after the bottom end of the screw rod 8 passes through the lower connecting plate 6 in a threaded manner, a worm wheel 17 is coaxially fixed thereto, and the worm wheel 17 is meshed with a worm 18 rotatably mounted below the lower connecting plate 6. The screw rod 8 rotates, the worm wheel 17 rotates, and the worm 18 rotates accordingly. At the same time, a transmission stud 20 is coaxially fixed to each of the two ends of the worm 18, which can be specifically integrally formed. In addition, a sliding arm 19 is threadedly engaged on the transmission stud 20. This sliding arm 19 can be an L-shaped structure, and one end of the sliding arm 19 is horizontally slidably installed on the bottom surface of the lower connecting plate 6, such as a T-shaped slider structure sliding engagement, and the other end is fixedly connected to a pressure block 5 to drive the pressure block 5 to move horizontally. In use, when the screw rod 8 rotates and the lower connecting plate 6 moves up, the synchronous rotation of the worm 18 and the transmission stud 20 can allow the two sliding arms 19 to move closer to each other to execute the process of clamping the terminal. When the screw rod 8 rotates to the lower connecting plate 6 at a set height position, the two pressure blocks 5 just clamp the terminal, and then at this extreme height position, torque continues to be applied to the screw rod 8, and the lower connecting plate 6 will continue to have an upward trend, and then a pulling force is generated on the terminal clamped between the two pressure blocks 5, that is, a pulling force is generated on the wire 4, so as to observe whether the terminal is detached from the wire 4, or whether the wire 4 is broken.

[0030] As another embodiment, since the pulling force applied to the wire 4 by the rise of the lower connecting plate 6 is relatively difficult to be synchronized with the two clamps 5 clamping the wiring terminals, especially this mechanism is only for a single type of wire 4 wiring test, because the linkage relationship between the clamp 5 clamping the wiring terminals and pulling the wire 4 up is often relatively unique, so the limitation of application is relatively large. In order to make it suitable for more types of wiring mechanical properties experiments, such as Figure 3-4 As shown, the two ends of the worm 18 here must each have an integral connection column 33, and then the connection column 33 is rotatably mounted in a mounting seat 21, thereby realizing the rotatable mounting of the worm 18. Specifically, the mounting seat 21 can be fixed to the bottom of the lower connecting plate 6, and the free end of the connection column 33 is coaxially fixed with a pressure plate 22, and the end surface size of the pressure plate 22 is larger than the end surface size of the connection column 33, that is, if the connection column 33 is a standard cylindrical shape, then when the pressure plate 22 is a standard disc shape, the diameter of the pressure plate 22 is larger than the diameter of the connection column 33. Based on the above structure, Figure 4 As shown, it is also necessary to fix an annular connection cover 25 specifically at the end of the transmission stud 20 facing the free end, that is, the end facing the connection column 33. The slide plate 24 and the disc spring 23 are axially slidably installed in the connection cover 25, and the pressure plate 22 is axially slidably inserted into the connection cover 25. Finally, on the end face of the connection cover 25 facing the transmission stud 20, a plurality of locking bolts 27 are threadedly installed and screwed into the connection cover 25. These locking bolts 27 are pressed and contacted on the slide plate 24 to strongly compress the disc spring 23. The part of the pressure plate 22 exposed from the connection column 33 should be firmly attached to the inner wall of the connection cover 25 to form an overall axial elastic extrusion connection structure with a certain elastic buffering effect. When the screw rod 8 rotates, the two pressure blocks 5 move closer to each other to clamp the wiring terminal of the wire 4. At this time, the lower connection plate 6 still has a long vertical upward stroke to straighten the wire 4, and then carry out the pulling test. Therefore, afterwards, the screw rod 8 continues to rotate, and since the terminal block has been clamped, the two pressure blocks 5 cannot continue to move closer, and the components inside the above-mentioned axial elastic extrusion connection structure will slip relatively, for example, the pressure plate 22 rotates relative to the transmission stud 20 in the connection cover 25, and then does not affect the continued rotation of the screw rod 8. The screw rod 8 can continue to rotate, so that the lower connecting plate 6 continues to rise, thereby applying sufficient tension to the wire 4; in addition, in the above process, due to the huge axial elastic force of the disc spring 23, the two pressure blocks 5 will not be slightly separated due to the easy reversal of the transmission column, thereby ensuring that the terminal block of the wire 4 is always firmly clamped.

[0031] As another special design structure, for different experimental batches, the above axial elastic extrusion connection structure should have different relative slipping capabilities. In order to adjust this capability, such as Figure 4 As shown, the locking bolts 27 are arranged in a circular array around the driving stud 20. Specifically, the nuts of the locking bolts 27 are processed into the structure of cylindrical gears 28, and the locking bolts 27 are located at one end in the connecting cover 25. Figure 4 The slide 24 is rotatably mounted in the slide 24 so that it cannot be separated from the slide 24 during the rotation process. Moreover, a guide block 31 is fixed to the side wall of the slide 24. The guide block 31 is slidably mounted in the inner wall of the connecting cover 25 in a direction parallel to the axial direction of the driving stud 20, so that the slide 24 always moves along a predetermined straight line direction parallel to the axis of the connecting cover 25. At the same time, in this embodiment, a locking nut 26 is threadedly engaged on the outside of the connecting cover 25, close to one end of the driving stud 20. This Figure 4 The center of the locking nut 26 shown is provided with a through hole for the transmission stud 20 to pass through. The inner wall of the through hole is processed into a structure of an inner gear ring 29 so that the inner gear ring 29 meshes with all cylindrical gears 28, thereby causing all the locking bolts 27 to move axially synchronously as long as the locking nut 26 rotates, applying pressure evenly to the slide plate 24 to maintain the stability of the entire overload slip structure. This is why the aforementioned slide plate 24 must always move in a predetermined straight line direction parallel to the axis of the connecting cover 25, because it is difficult to achieve axial positioning of the locking bolt 27 by relying on threaded fit, but a Figure 4 After the rotational cooperation structure shown, the axial positioning can be achieved by the rotational cooperation between the locking bolts 27 and the slide plate 24, ensuring that the extrusion and pushing of the slide plate 24 by each locking bolt 27 is consistent.

[0032] Since the locking nut 26 is threadedly mounted on the connecting cover 25, it can be in a relatively fixed position during the rotation process. However, in order to improve the stability of the locking nut 26, a compressible spring 30 is provided between the locking nut 26 and the connecting cover 25. This spring 30 is similar to the spring washer in the bolt connection, but has a greater elastic force to provide a greater preload force. Since the inner gear ring 29 of the locking nut 26 is larger and the cylindrical gear 28 of the locking bolt 27 is smaller, the locking nut 26 rotates slightly by an angle and the locking bolt 27 can rotate several circles. Therefore, the spring 30 can be used to adapt to the axial deformation without using elastic elements with large deformation such as springs. In addition, in order to improve reliability, the disc springs 23 are provided with a plurality of disc springs 23, and all disc springs 23 are arranged concentrically with each other.

[0033] To improve reliability, Figure 4As shown, wear-resistant friction discs 32 can be fixed on the end face of the pressure plate 22 close to the connecting column 33, and on the inner wall of the connecting cover 25 opposite to the end face. The two wear-resistant friction discs 32 are coaxially fitted and kept in contact with each other to form a larger frictional bonding force, and are convenient for direct replacement and maintenance after wear.

[0034] like Figure 2 and Figure 5 As shown, the rotating platform 3 is a circular boss structure, and a plurality of rolling bearings 34 are arranged around the rotating platform 3, which can be deep groove ball bearings. The rolling bearings 34 are rotatably mounted on the bearing plate 2, and one side of the rolling bearing 34 is located on the annular step surface of the circular boss structure and is in rolling tangential contact with the side wall of the upper truncated platform of the circular boss structure, so that the rotating platform 3 can rotate more flexibly and stably. In order to drive the rotating platform 3, this embodiment introduces a simple and practical structure, that is, Figure 2 As shown, an outer gear ring 35 is coaxially fixed at the bottom end of the rotating table 3. The outer gear ring 35 extends below the supporting plate 2. The outer gear ring 35 is meshed with a driving gear 36 through a reduction gear, and the driving gear 36 is fixed on the main shaft of a speed regulating AC motor 12. The speed regulating AC motor 12 is fixed in the stand 1, and the rotating table 3 is flexibly driven to rotate by the speed regulating AC motor 12.

[0035] The above series of specific implementation details are merely some preferred embodiments of the present invention and cannot be used to limit the protection scope of the claims of the present invention. A person skilled in the art can simply change the design ideas based on the understanding of the above embodiments and the reference to the basic principles recorded in the claims of the present invention. However, these design changes still fall within the protection scope of the invention.

Claims

1. A wiring firmness test bench, comprising a clamping component for clamping a connection end of a wire (4), and a connecting component for connecting the other end of the wire (4), wherein the clamping component can be moved vertically upward to pull the wire (4), characterized in that: The clamping component comprises a pair of pressure blocks (5) arranged opposite to each other, and the two pressure blocks (5) are driven by a thread pair to move closer to or away from each other; the connecting component comprises a rotating table (3) located below the two pressure blocks (5), and the rotating table (3) is rotatably mounted on a bearing plate (2) in a stand (1), and a mounting hole (301) is provided in the center of the rotating table (3) for the other end of the wire (4) to pass through and be fixed, and a plurality of threading holes (302) are also provided on the rotating table (3) in addition to the mounting hole (301), and a counterweight block is provided below the threading hole (302), and the counterweight block is fixed on the other end of the wire (4) to straighten the wire (4); It also includes a plurality of guide posts (9) vertically slidably mounted on the platform (1), with a connecting plate fixed vertically to each end of the guide post (9), the pressing block (5) being horizontally slidably mounted on the lower connecting plate (6), and a screw rod (8) being mounted in a threaded manner at the center of the lower connecting plate (6), the screw rod (8) being vertically mounted on the platform (1) in an in-situ self-rotating manner, so that the two connecting plates and the guide posts (9) can move up or down together; After the bottom end of the screw rod (8) passes through the lower connecting plate (6) in a threaded manner, a worm wheel (17) is coaxially fixed thereto. The worm wheel (17) meshes with a worm (18) rotatably mounted below the lower connecting plate (6). A transmission stud (20) is coaxially fixed to each of the two ends of the worm (18). A sliding arm (19) is threadedly mounted on the transmission stud (20). One end of the sliding arm (19) is horizontally slidably mounted on the bottom surface of the lower connecting plate (6), and the other end of the sliding arm (19) is fixedly connected to the pressing block (5). When the screw rod (8) rotates to move the lower connecting plate (6) upward, the synchronous rotation of the worm (18) and the transmission stud (20) causes the two sliding arms (19) to move closer to each other.

2. A wiring firmness test bench according to claim 1, characterized in that: A hand wheel (7) is coaxially fixed to the screw rod (8), and the hand wheel (7) is used to manually rotate the screw rod (8) when held by hand; the guide column (9) and the screw rod (8) are axially slidably matched with the stand (1) and are all installed using a shaft sleeve (10).

3. A wiring firmness test bench according to claim 1, characterized in that: The two ends of the worm (18) are each integrally provided with a connecting column (33), the connecting column (33) is rotatably mounted in a mounting seat (21), the mounting seat (21) is fixed on the lower connecting plate (6), and the free end of the connecting column (33) is coaxially fixed with a pressure plate (22) whose end surface size is larger than that of the connecting column (33); An annular connecting cover (25) is fixed to the end of the driving stud (20) opposite to the free end, and a slide plate (24) and a disc spring (23) are axially slidably installed in the connecting cover (25), as well as the pressure plate (22) extending into the connecting cover (25) in an axially slidable manner; a locking bolt (27) screwed into the connecting cover (25) is threadedly installed on the side of the connecting cover (25) facing the driving stud (20), and the locking bolt (27) is pressed and contacted on the slide plate (24) so ​​that the part of the pressure plate (22) exposed from the connecting column (33) is firmly fitted with the inner wall of the connecting cover (25).

4. A wiring firmness test bench according to claim 3, characterized in that: The locking bolts (27) are arranged in a circular array around the transmission stud (20); the nuts of the locking bolts (27) are processed into the structure of cylindrical gears (28); one end of the locking bolts (27) located in the connection cover (25) is rotatably mounted in the slide plate (24) and cannot be separated from the slide plate (24); a guide block (31) is fixed to the side wall of the slide plate (24); the guide block (31) is slidably mounted in the inner wall of the connection cover (25) along a direction parallel to the axial direction of the transmission stud (20); A locking nut (26) is threadedly engaged with one end of the driving stud (20) on the outside of the connection cover (25); the inner wall of the through hole of the locking nut (26) for the driving stud (20) to pass through is processed into a structure of an inner gear ring (29); and the inner gear ring (29) is meshed with all cylindrical gears (28).

5. A wiring firmness test bench according to claim 4, characterized in that: A compressible spring sheet (30) is provided between the locking nut (26) and the connecting cover (25); a plurality of disc springs (23) are provided, and all disc springs (23) are arranged concentrically with each other.

6. A wiring firmness test bench according to claim 3, characterized in that: A wear-resistant friction disk (32) is fixed on the end surface of the pressure plate (22) close to the connecting column (33) and on the inner wall of the connecting cover (25) opposite to the end surface. The two wear-resistant friction disks (32) are coaxially fitted and kept in contact with each other.

7. A wiring firmness test bench according to any one of claims 1 to 6, characterized in that: The rotating platform (3) is a circular boss structure, and a plurality of rolling bearings (34) are arranged around the rotating platform (3). The rolling bearings (34) are rotatably mounted on the bearing plate (2), and one side of the rolling bearing (34) is located on the annular step surface of the circular boss structure and is in rolling tangential contact with the side wall of the upper truncated cone of the circular boss structure. An outer gear ring (35) is coaxially fixed at the bottom end of the rotating platform (3), and the outer gear ring (35) extends below the bearing plate (2). The outer gear ring (35) is meshed with a driving gear (36) through a reduction gear, and the driving gear (36) is fixed on the main shaft of a speed regulating AC motor (12), and the speed regulating AC motor (12) is fixed in the platform (1).

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