Cable tension test device

Abstract

The invention provides a cable tension test device, and relates to the technical field of cable tension test. The cable tension test device comprises a tension amplification mechanism arranged on a driving mechanism, wherein the tension amplification mechanism is formed by connecting piston cylinders with different diameters in series; the piston cylinder with the large diameter is fixedly connected to the workbench, and a piston rod on the piston cylinder is fixedly connected with the displacement end. The small-diameter piston cylinder is fixed to the large-diameter piston cylinder, and a piston rod in the small-diameter piston cylinder is fixedly connected with the moving end of the driving mechanism; pistons of the piston cylinders are filled with hydraulic oil, holes communicated with the outside are formed in the two sides of the pistons of the series piston cylinders, the force transmitted by the driving mechanism to the cable direction is amplified through the series connection relation between the small piston cylinders and the large piston cylinders, and on the contrary, the force needed by cable breakage is not changed. Therefore, the load between the ball and the lead screw on the driving mechanism is reduced, the abrasion between the ball and the lead screw is reduced, and the service life of the driving mechanism is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of cable tension testing, and in particular to a cable tension testing device. Background Art

[0002] During the production process, cables need to be tensile tested to ensure their safety, durability, compliance, quality control and performance. During the test, gradually increasing tensile force needs to be applied to the cable, and the sensor is used to transmit the detected force value to the control system. The control system processes the collected data and displays it on the screen in real time. Finally, the force curve is analyzed by the software system to obtain the cable's tensile strength, breaking strength and other performance parameters.

[0003] In the prior art, a ball screw is often used to provide a gradually increasing tension to the cable. However, as the tension gradually increases, before the cable breaks, the load between the ball and the screw will increase as the tension on the cable increases. The overload will increase the wear between the ball and the screw and reduce the service life of the ball screw. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a cable tension test device, comprising a workbench, a cable clamp and a driving mechanism, wherein the displacement end of the cable clamp is provided with linear displacement power by the driving mechanism, a tension sensor is arranged between the displacement end and the moving end of the driving mechanism, and further comprising:

[0005] The driving mechanism is provided with a tension amplifying mechanism, and the tension amplifying mechanism is composed of piston cylinders with different diameters connected in series; the piston cylinder with a larger diameter is fixedly connected to the workbench, and the piston rod thereon is fixedly connected to the displacement end; the piston cylinder with a smaller diameter is fixed to the piston cylinder with a larger diameter, and the piston rod therein is fixedly connected to the moving end of the driving mechanism; hydraulic oil is filled between the pistons of the piston cylinders connected in series, and holes communicating with the outside are provided on both sides of the pistons of the series-connected piston cylinders.

[0006] Preferably, the cable clamp also includes a fixed end, and the fixed end and the displacement end have exactly the same structural size, and the fixed end includes: a base, a top cover, a plurality of telescopic parts and a plurality of wire support plates, the base is fixedly connected to the workbench, and a plurality of wire grooves are arranged on its upper end surface; the top cover is clamped to the base and fixes the cables; the plurality of telescopic parts are fixed to the base; the plurality of wire support plates are fixed to the telescopic ends of the telescopic parts, and are inserted into the base and abut against the cables.

[0007] Preferably, the driving mechanism includes: a driving motor, a transmission screw and a ball nut, the driving motor is fixedly connected to the workbench; the transmission screw is keyed to the output shaft of the driving motor; the ball nut is adapted to the transmission screw and is fixedly connected to the piston rod of the piston cylinder with a small inner diameter of the tension amplification mechanism.

[0008] Preferably, the piston cylinder with a smaller diameter in the tension amplification mechanism is a thin cylinder body, and the piston cylinder with a larger diameter is a thick cylinder body.

[0009] Preferably, the piston rod of the piston cylinder with a small diameter is a thin cylinder telescopic end, one end of which is slidably inserted into the thin cylinder body and the other end is fixedly connected to the ball nut.

[0010] Preferably, the piston rod of the piston cylinder with a large diameter is the telescopic end of the rough cylinder, one end of which is slidably inserted into the rough cylinder body and the other end is fixedly connected to the tension sensor.

[0011] Preferably, the telescopic end of the thin cylinder includes: a thin cylinder slide rod and a thin cylinder end transmission plate, a plurality of the thin cylinder slide rods are evenly arranged along the axial circumference of the thin cylinder body, and one end of the thin cylinder slide rod inserted into the thin cylinder body is fixedly connected to the piston of the thin cylinder body; the thin cylinder end transmission plate is fixedly connected to one end of the plurality of thin cylinder slide rods extending out of the thin cylinder body.

[0012] Preferably, a transmission assembly is arranged between the ball nut and the fine cylinder slide rod, and the transmission assembly includes: two first transmission rods, a transmission sleeve, two second transmission rods and two connecting rods, the two first transmission rods are symmetrically arranged and fixedly inserted in the side wall of the ball nut; the transmission sleeve and the two first transmission rods are fixedly connected; the two second transmission rods are fixedly inserted in the end of the transmission sleeve away from the first transmission rod, and are slidably inserted in the outer wall of the coarse cylinder body; the two connecting rods are arranged in a V shape, and the two second transmission rods are fixedly connected to the transmission plate at the fine cylinder end.

[0013] Preferably, the transmission sleeve is slidably mounted on the cylinder body.

[0014] Preferably, the telescopic end of the rough cylinder includes: a rough cylinder slide rod and a rough cylinder end transmission plate, a plurality of the rough cylinder slide rods are evenly arranged along the axial circumference of the rough cylinder body, and one end of the rough cylinder slide rods inserted into the rough cylinder body is fixedly connected to the piston of the rough cylinder body; the rough cylinder end transmission plate is fixedly connected to one end of the plurality of the rough cylinder slide rods extending out of the rough cylinder body, and is fixedly connected to the tension sensor.

[0015] The beneficial effects of the present invention are:

[0016] 1. By utilizing the series relationship between the small piston cylinder and the large piston cylinder, the force transmitted by the drive mechanism to the cable direction can be amplified. On the contrary, the force required for the cable to break remains unchanged, and the load borne by the drive mechanism direction can be reduced. This will reduce the load between the ball and the screw on the drive mechanism, reduce the wear between the two, and extend its service life;

[0017] 2. By utilizing the incompressible characteristics of hydraulic oil and the difference in diameter between the series-connected piston cylinders, the load transmitted by the cable to the drive mechanism is reduced, and the multiple relationship of the reduction is the same as the ratio of the cross-sectional area of ​​the series-connected piston cylinders.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of the overall structure of a cable tension test device according to an embodiment of the present application;

[0021] Figure 2 is a partial structural schematic diagram of a cable tension test device according to an embodiment of the present application;

[0022] Figure 3 is an exploded view of a local structure of a cable tension test device according to an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the structure of the tension amplification mechanism according to an embodiment of the present application and a schematic diagram of the position of the follower mechanism therein;

[0024] Figure 5 is a cross-sectional view of a tension amplification mechanism and a follower mechanism according to an embodiment of the present application;

[0025] Figure 6 is a partial structural exploded diagram of a tension amplification mechanism according to an embodiment of the present application;

[0026] Figure 7 is a schematic diagram of the structure and position of the follower mechanism according to an embodiment of the present application;

[0027] Figure 8 is a structural exploded diagram of a passive component according to an embodiment of the present application;

[0028] Fig. 9 is a cross-sectional view of a passive component according to an embodiment of the present application;

[0029] Fig.10 is a side view of a small sealing assembly according to an embodiment of the present application Figure 1 ;

[0030] Fig.11 is a side view of a small sealing assembly according to an embodiment of the present application Figure 2 ;

[0031] Fig.12 The structural explosion of the small sealing component according to the embodiment of the present application Figure 1 ;

[0032] Fig.13 The structural explosion of the small sealing component according to the embodiment of the present application Figure 2 ;

[0033] Fig.14 It is a schematic diagram of the partial structure of a small sealing assembly according to an embodiment of the present application.

[0034] Icons: 1. Workbench; 11. Equipment platform; 12. Passive slide; 13. Active slide; 14. Protective cover; 2. Cable clamp; 21. Fixed end; 211. Base; 212. Top cover; 213. Telescopic member; 214. Wire support plate; 22. Displacement end; 3. Driving mechanism; 31. Driving motor; 32. Transmission screw; 33. Ball nut; 4. Tension sensor; 5. Cable; 6. Tension amplification mechanism; 61. Thin cylinder body; 62. Rough cylinder body; 63. Thin cylinder telescopic end; 631. Thin cylinder slide rod; 632. Thin cylinder end transmission plate; 64. Transmission assembly; 641. First transmission rod; 642. Transmission sleeve; 643. Second transmission rod; 644. Connecting rod ;65. Telescopic end of the coarse cylinder;651. Sliding rod of the coarse cylinder;652. Transmission plate of the coarse cylinder end;7. Follow-up mechanism;71. Passive component;711. Guide shell;712. Guide plug;713. Power blade;714. Guide port;72. Transmission rod of the fine cylinder end;721. Fan blade of the fine cylinder end;722. Sealing ring of the fine cylinder end;73. Transmission rod of the coarse cylinder end;731. Fan blade of the coarse cylinder end;732. Sealing ring of the coarse cylinder end;8. Small sealing component;81. First piston seat;811. First axial channel;812. First radial channel;82. Retaining ring;821. Guide channel;83. Second piston seat;831. Second axial channel;832. Second radial channel;9. Large sealing component. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Embodiment 1, as Figure 1-Figure 14 As shown, a cable tension testing device according to an embodiment of the present application includes a workbench 1, a cable clamp 2 and a driving mechanism 3. The displacement end 22 of the cable clamp 2 is provided with power for linear displacement by the driving mechanism 3, and a tension sensor 4 is arranged between the displacement end 22 and the moving end of the driving mechanism 3.

[0038] like Figure 1 and Figure 2 As shown, in a specific embodiment of the present application, an equipment platform 11 is fixedly connected to the upper end surface of the workbench 1, and a passive slide 12 and an active slide 13 are arranged in the same direction on the equipment platform 11. The active slide 13 is adapted to the moving end of the driving mechanism 3, and the passive slide 12 is adapted to the displacement end 22 of the cable clamp 2. A protective cover 14 is also fixedly connected to the workbench 1, covering the moving end of the driving mechanism 3.

[0039] like Figure 2-Figure 6 As shown, a cable tension testing device of an embodiment of the present application also includes a tension amplification mechanism 6 arranged in the driving mechanism 3, and the tension amplification mechanism 6 is composed of two piston cylinders with different diameters connected in series; the piston cylinder with a larger diameter is fixedly connected to the workbench 1, specifically to the inner side of the protective cover 14, and the piston rod thereon is fixedly connected to the displacement end 22; the piston cylinder with a smaller diameter is fixed to the piston cylinder with a larger diameter, and the piston rod therein is fixedly connected to the moving end of the driving mechanism 3; hydraulic oil is filled between the pistons of the two piston cylinders, and holes communicating with the outside are arranged on both sides of the pistons of the two piston cylinders.

[0040] It can be understood that the moving end of the driving mechanism 3 will be able to drive the piston rod of the small piston cylinder to move, and use the hydraulic oil to transmit the force to the large piston cylinder. The piston rod in the large piston cylinder will drive the displacement end 22 to move in the same direction. In this way, the cable 5 is pulled, and the cross-sectional ratio between the large and small piston cylinders is used to amplify or reduce the force, thereby reducing the load on the driving mechanism 3.

[0041] In addition, a cable tension test device according to an embodiment of the present application also has the following additional technical features:

[0042] like Figure 2 and Figure 3As shown, the cable clamp 2 also includes a fixed end 21. The fixed end 21 and the displacement end 22 have exactly the same structure and size. The fixed end 21 includes: a base 211, a top cover 212, a plurality of telescopic parts 213 and a plurality of fixed line support plates 214. The base 211 is fixedly connected to the workbench 1, specifically to the equipment platform 11, and a plurality of wire grooves are arranged on its upper end surface. The widths of the plurality of wire grooves are different, so as to be suitable for tensile tests of cables 5 of different thicknesses.

[0043] The top cover 212 is snapped onto the base 211 and fixes the cable 5. Multiple telescopic parts 213 are fixed to the base 211. Multiple line-fixing support plates 214 are fixed to the telescopic ends of the telescopic parts 213. After being plugged into the base 211, they abut against the cable 5. Specifically, the cable 5 to be tested can be crimped into a suitable wire groove. The top cover 212 slides from the side end to the base 211, and then the telescopic parts 213 under the corresponding wire groove drive the line-fixing support plates 214 to rise, so that the cable 5 and the bottom of the top cover 212 are tightly abutted to achieve fixation.

[0044] It should be noted that, in a specific embodiment of the present application, the telescopic member 213 is preferably an electric push rod to facilitate controlling the height change of the line-fixing support plate 214 .

[0045] Furthermore, the driving mechanism 3 includes: a driving motor 31, a transmission screw 32 and a ball nut 33, the driving motor 31 is fixedly connected to the workbench 1; the transmission screw 32 is keyed to the output shaft of the driving motor 31; the ball nut 33 is adapted to the transmission screw 32, and is fixedly connected to the piston rod of the piston cylinder with a small inner diameter of the tension amplification mechanism 6.

[0046] It should be noted that the displacement end 22 and the moving end of the passive slide 12 are fixed so that the displacement end 22 can change position on the workbench 1, and the ball nut 33 and the moving end of the active slide 13 are fixed so that the ball nut 33 can stably perform axial displacement.

[0047] like Figure 3-Figure 7 As shown, the piston cylinder with a small diameter in the tension amplification mechanism 6 is a thin cylinder body 61, and the piston cylinder with a large diameter is a thick cylinder body 62; the piston rod of the piston cylinder with a small diameter is a thin cylinder telescopic end 63, one end of which is slidably inserted in the thin cylinder body 61, and the other end is fixed to the ball nut 33; the piston rod of the piston cylinder with a large diameter is a thick cylinder telescopic end 65, one end of which is slidably inserted in the thick cylinder body 62, and the other end is fixed to the tension sensor 4. It should be noted that Figure 3 As shown, one end of the tension sensor 4 is fixedly connected to the displacement end 22, and the other end is fixedly connected to the telescopic end 65 of the rough cylinder, so as to monitor and record the tension value in real time.

[0048] Specifically, the telescopic end 63 of the thin cylinder includes: a thin cylinder slide rod 631 and a thin cylinder end transmission plate 632. A plurality of thin cylinder slide rods 631 are evenly arranged along the axial circumference of the thin cylinder body 61, and one end thereof inserted into the thin cylinder body 61 is fixedly connected to the piston of the thin cylinder body 61; the thin cylinder end transmission plate 632 is fixedly connected to one end of the plurality of thin cylinder slide rods 631 extending out of the thin cylinder body 61.

[0049] Furthermore, a transmission assembly 64 is arranged between the ball nut 33 and the fine cylinder slide rod 631, and the transmission assembly 64 includes: two first transmission rods 641, a transmission sleeve 642, two second transmission rods 643 and two connecting rods 644, the two first transmission rods 641 are symmetrically arranged and fixedly inserted in the side wall of the ball nut 33; the transmission sleeve 642 and the two first transmission rods 641 are fixedly connected, and the transmission sleeve 642 is slidably sleeved on the fine cylinder body 61; the two second transmission rods 643 are fixedly inserted in the end of the transmission sleeve 642 away from the first transmission rod 641, and are slidably inserted in the outer wall of the rough cylinder body 62; the two connecting rods 644 are arranged in a V shape, and the two second transmission rods 643 are fixedly connected to the transmission sleeve 642 at the fine cylinder end.

[0050] It is understandable that, in this way, a fixed connection is formed between the ball nut 33 and the telescopic end 63 of the thin cylinder, and a certain stabilizing effect is played through the sliding plug-in cooperation between the two second transmission rods 643 and the thick cylinder body 62.

[0051] Furthermore, the coarse cylinder telescopic end 65 includes: a coarse cylinder slide rod 651 and a coarse cylinder end transmission plate 652, a plurality of coarse cylinder slide rods 651 are evenly arranged along the axial circumference of the coarse cylinder body 62, and one end thereof inserted into the coarse cylinder body 62 is fixedly connected to the piston of the coarse cylinder body 62; the coarse cylinder end transmission plate 652 is fixedly connected to one end of the plurality of coarse cylinder slide rods 651 extending out of the coarse cylinder body 62, and is fixedly connected to the tension sensor 4.

[0052] The following describes the use process of a cable tension test device according to an embodiment of the present application with reference to the accompanying drawings:

[0053] When in use, the cable 5 (this application) to be tested Figure 1 and Figure 2 The figure is only used as an example to show that the test device can place cables 5 of different thicknesses) embedded in the corresponding wire groove on the base 211 of the fixed end 21, and then the top cover 212 is slidably connected to the base 211, and then the corresponding telescopic member 213 under the wire groove is used to lift the fixed wire support plate 214, so that the cable 5 is tightly abutted against the top cover 212 to form a fixed position. Similarly, the displacement end 22 is set in the same way. After the cable 5 is fixed, Figure 2As shown, the tension test equipment at this time drives the transmission screw 32 to rotate through the driving motor 31, because the ball nut 33 on it is fixed to the tension amplification mechanism 6, and the tension amplification mechanism 6 is fixed to the protective cover 14, and the ball nut 33 is also fixed to the moving end of the active slide 13, so that the ball nut 33 will have a stable axial displacement on the transmission screw 32. This application takes the direction toward the driving motor 31 as an example. The displacement of the ball nut 33 will drive the transmission component 64 to have a synchronous and directional displacement with it, and then the fine cylinder slide rod 631 will have a synchronous and directional displacement with the ball nut 33. The displacement of the fine cylinder slide rod 631 will drive the piston in the fine cylinder body 61 to have a synchronous and directional displacement, and the piston in the fine cylinder body 61 and the piston in the rough cylinder body 62 The pistons are filled with hydraulic oil, so the pistons in the rough cylinder 62 will be forced to move synchronously in the same direction, that is, move along the rough cylinder 62 toward one end of the fine cylinder 61, and further drive the rough cylinder slide rod 651 therein to move synchronously in the same direction. One end of the tension sensor 4 is fixedly connected to the rough cylinder end transmission plate 652, and the other end is fixedly connected to the displacement end 22. Therefore, through the rotation of the drive motor 31, the displacement end 22 will move toward the side of the drive motor 31 on the passive slide 12 to stretch the cable 5. During this period, the tension sensor 4 monitors and records the tension value until the cable 5 breaks. According to the force value monitored by the tension sensor 4, the control system of the tension test device (the existing technology is very mature and will not be described here) processes the collected data The force value curve is analyzed by the software system to obtain the performance parameters such as the tensile strength and the breaking strength of the cable 5. In the embodiment of the present application, the ball nut 33 transmits the pulling force to the piston in the fine cylinder 61, and the force is transmitted to the piston in the thick cylinder 62 through the piston in the fine cylinder 61 and the hydraulic oil, and then transmitted to the cable 5. The diameter of the piston in the fine cylinder 61 is different from the diameter of the piston in the thick cylinder 62. Due to the difference in piston area, a smaller force at the input end (fine cylinder 61) can generate a larger force at the output end (thick cylinder 62). For example, assuming that the piston area at the input end is S1 and the piston area at the output end is S2 (S2>S1), when a force F1 is applied to the input end, due to the incompressibility of the hydraulic oil and the Pascal constant The law, the output end will generate a force F2 with the same pressure as the input end. Due to the difference in piston area, the size of F2 will be greater than F1, realizing force amplification. Specifically, the force amplification multiple is equal to the ratio of the piston area at the output end to the piston area at the input end, that is, F2 / F1=S2 / S1. In this way, the force transmitted by the ball nut 33 will be amplified at the piston in the rough cylinder 62. For example, if the force value required for the cable 5 to break is 1 Newton, then under the action of the tension amplification mechanism 6 in the embodiment of the present application, the axial force generated between the ball nut 33 and the transmission screw 32 should be less than 1 Newton. Therefore, the tension amplification mechanism 6 significantly reduces the load between the ball nut 33 and the transmission screw 32. Therefore, when the cable 5 is subjected to a tension test,Compared with the original (existing technology without the tension amplification mechanism 6), the load between the ball and the screw caused by the gradually increasing tension will be reduced exponentially in the present application, reducing the load between the ball in the ball nut 33 and the transmission screw 32, reducing the degree of wear and improving the service life.

[0054] Embodiment 2. In the related art, in the cable tension test device, the tension amplification mechanism 6 has holes on both sides of the piston that communicate with the outside world, so that the piston can be displaced in the corresponding cylinder as losslessly as possible to achieve accurate amplification or reduction of force. Therefore, the external gas will enter the cylinder body as the piston is displaced. Over time, dust and other debris will accumulate inside the cylinder body, affecting the normal sliding, sealing and service life of the piston in the cylinder body.

[0055] According to some embodiments of the present application, Figure 6-Figure 9 As shown, the piston in the thin cylinder body 61 is the small sealing component 8, and the piston in the thick cylinder body 62 is the large sealing component 9. A follower mechanism 7 is arranged axially on the small sealing component 8 and the large sealing component 9. The follower mechanism 7 is coaxially connected to the thick cylinder body 62. The small sealing component 8 and the large sealing component 9 are coupled with the follower mechanism 7 respectively (it should be noted here that the large sealing component 9 and the small sealing component 8 can be sealed and slidable relative to the follower mechanism 7 and can also be sealed and rotated). The follower mechanism 7 extends out of the small sealing component 8 and the large sealing component 9 at both ends thereof, and fan blades are arranged respectively, and a power conversion component is coaxially arranged in the fixed part of the follower mechanism 7.

[0056] Among them, the follower mechanism 7 includes: a passive component 71, a fine cylinder end transmission rod 72 and a coarse cylinder end transmission rod 73, the passive component 71 is rotatably connected to one end of the coarse cylinder body 62 close to the fine cylinder body 61; the fine cylinder end transmission rod 72 is coaxially fixed to the passive component 71 and passes through the small sealing component 8; the coarse cylinder end transmission rod 73 is coaxially fixed to the passive component 71 and passes through the large sealing component 9.

[0057] Specifically, the passive component 71 includes: a guide shell 711, a guide plug 712, a power blade 713 and a guide port 714. The guide shell 711 is rotatably connected to one end of the coarse cylinder 62 close to the fine cylinder 61; the guide plug 712 and the guide shell 711 are coaxially arranged, and the two ends thereof are symmetrically arranged, and are gradually contracted from the inside to the outside along the axial direction (such as Figure 8 and Fig. 9As shown); multiple power blades 713 are evenly arranged at both ends of the guide plug 712 in the circumferential direction and fixed to the guide shell 711. The power blades 713 on both sides of the guide plug 712 are symmetrically arranged (so that no matter which side the hydraulic oil impacts the guide plug 712, the guide plug 712 will rotate in a fixed direction). The power blades 713 are arranged in an arc shape and are inclined on both sides of the guide plug 712; two guide ports 714 are coaxially symmetrically arranged at both ends of the guide shell 711.

[0058] Furthermore, one end of the fine cylinder end transmission rod 72 extending out of the small sealing component 8 is fixedly connected with a fine cylinder end fan blade 721 , and a fine cylinder end sealing ring 722 is coupled to the fine cylinder end transmission rod 72 , and the fine cylinder end sealing ring 722 is fixedly inserted into the small sealing component 8 .

[0059] Furthermore, one end of the coarse cylinder end transmission rod 73 extending out of the large sealing assembly 9 is fixedly connected to a coarse cylinder end fan blade 731 , and a coarse cylinder end sealing ring 732 is coupled to the coarse cylinder end transmission rod 73 , and the coarse cylinder end sealing ring 732 is fixedly inserted into the large sealing assembly 9 .

[0060] It should be noted that the fan blades 721 at the thin cylinder end and the fan blades 731 at the thick cylinder end are different in size, and the fan blade angles are set so as to generate a blowing force outward during the rotation process.

[0061] Therefore, during specific use, no matter which side the small sealing component 8 and the large sealing component 9 are displaced axially, the hydraulic oil between the two will form a flow in the guide shell 711, and during this flow process, the hydraulic oil will generate a certain tangential force on the power blade 713, forcing it to rotate, and the design of the guide shell 711 and the guide plug 712 will make the channel of the hydraulic oil smaller when passing through here, so that its flow rate will increase, so that the entire passive component 71 can generate a certain rotation speed, and then drive the fine cylinder end transmission rod 72 and the coarse cylinder end transmission rod 73 coaxially fixed on both sides thereof to rotate synchronously in the same direction, so that the fine cylinder end blade 721 and the coarse cylinder end blade 731 will rotate during the displacement of the small sealing component 8 and the large sealing component 9 along the axis, and the rotating blades will cause the dust and other debris that originally entered the cylinder body due to the external airflow to be blown to the outside. It can be understood that, for example When the small sealing component 8 and the large sealing component 9 are axially displaced toward the side of the driving motor 31, a large amount of air will flow into the space on the left side of the large sealing component 9 under the action of pressure, and conversely, the gas in the space on the right side of the small sealing component 8 will be squeezed to the outside. Because the fine cylinder end blades 721 and the coarse cylinder end blades 731 rotate in this process, the air entering the space on the left side of the large sealing component 9 will be blown to the outside under the action of the coarse cylinder end blades 731. This can use the in and out of the airflow to blow up the originally deposited dust, which plays a certain cleaning role. The rotation of the fine cylinder end blades 721 in the space on the right side of the small sealing component 8 will blow up the dust deposited on this side and blow it directly to the outside. In this way, through this design, the flow of hydraulic oil is used to drive the blades at both ends of the cylinder body to rotate, which plays a certain cleaning role in the cylinder body, thereby ensuring the service life of the piston to a certain extent.

[0062] Embodiment three, in the related art, in this cable tension test device, since the force transmitted from the ball nut 33 to the direction of the cable 5 is changed by the tension amplification mechanism 6 to reduce the load between the ball nut 33 and the transmission screw 32, the piston in the tension amplification mechanism 6 is very important. Once its sealing performance is reduced, the force transmitted from the ball nut 33 to the direction of the cable 5 will be disturbed or even lose the function of transmitting force, affecting the tension of the entire test device and the detection result of the entire test device.

[0063] According to some embodiments of the present application, Figure 7 , Figure 10-Figure 14 As shown, the small sealing component 8 and the large sealing component 9 have the same structure and only differ in diameter. In the embodiment of the present application, only the small sealing component 8 is used as an example for structural description. It should be noted that the installation directions of the small sealing component 8 and the large sealing component 9 are opposite, that is, the two are symmetrically arranged.

[0064] Specifically, the small sealing assembly 8 includes: a first piston seat 81, a retaining ring 82 and a second piston seat 83. A sealing strip is sealed and embedded on the side wall of the first piston seat 81, and a protrusion is provided at one end of the first piston seat 81; the retaining ring 82 is fixedly sleeved on the protrusion of the first piston seat 81, and its outer diameter is not larger than the outer diameter of the first piston seat 81; a sealing strip is sealed and embedded on the side wall of the second piston seat 83, and a protrusion is provided at one end of the second piston seat 83, which is fixedly embedded in the retaining ring 82.

[0065] It should be noted that the two sealing strips sleeved on the side wall of the small sealing assembly 8 realize a sealing sliding fit with the inner wall of the thin cylinder body 61 .

[0066] Among them, a plurality of first axial channels 811 are evenly arranged circumferentially on the axial direction of the first piston seat 81, and the plurality of first axial channels 811 penetrate the first piston seat 81. A plurality of first radial channels 812 are arranged radially on the first piston seat 81, and the plurality of first radial channels 812 and the plurality of first axial channels 811 are connected one by one and are connected to the position where the sealing strip is embedded.

[0067] Furthermore, a plurality of guide channels 821 are evenly arranged circumferentially on the side wall of the retaining ring 82 . The plurality of guide channels 821 are connected to the plurality of first axial channels 811 one by one, respectively, and penetrate the retaining ring 82 . The plurality of guide channels 821 are interconnected.

[0068] Furthermore, a plurality of second axial channels 831 are evenly arranged circumferentially on the axial direction of the second piston seat 83, the plurality of second axial channels 831 do not penetrate the second piston seat 83, the plurality of second axial channels 831 and the plurality of guide channels 821 are connected one-to-one, and a plurality of second radial channels 832 are evenly arranged circumferentially on the radial direction of the second piston seat 83, the plurality of second radial channels 832 and the plurality of second axial channels 831 are connected one-to-one, and are connected at a position where a sealing strip is embedded.

[0069] It should be noted that if Figure 7 As shown, the sides of the small sealing assembly 8 and the large sealing assembly 9 where the first axial passage 811 is provided are arranged close to each other, that is, the first axial passage 811 faces the hydraulic oil side.

[0070] Thus, during specific use, when the small sealing assembly 8 and the large sealing assembly 9 undergo synchronous displacement, the hydraulic oil will, under the action of pressure, transmit the pressure through the first axial channel 811 into the first radial channel 812, and apply an outward radial force to the sealing strip corresponding to it radially, promoting a better sealing contact between the sealing strip and the inner wall of the cylinder. Since the first axial channel 811 communicates with the diversion channel 821, and the diversion channel 821 communicates with the second axial channel 831, and the second axial channel 831 in turn communicates with the second radial channel 832, therefore, the hydraulic oil can synchronously transmit the pressure to the sealing strip corresponding to the second radial channel 832 radially and apply an outward radial force to this sealing strip. In this way, better sealing contacts will be achieved between the two sealing strips on the small sealing assembly 8 and the large sealing assembly 9 and the inner walls of the corresponding cylinders respectively, so as to prevent the sealing performance from decreasing during use.

[0071] Further, as Fig.14 shown, the cross-sections of the two sealing strips are arranged in a U-shape. Therefore, under the action of the pressure transmitted by the hydraulic oil, axial forces will be applied to the inner side walls of the two sealing strips simultaneously to further ensure the sealing performance of the sealing strips on the side walls of the small sealing assembly 8 and the large sealing assembly 9. It should be noted that in the specific embodiments of the present application, the radial thickness of the U-shaped sealing strip (i.e., the arc portion in contact with the inner wall of the cylinder) can adopt a thickening design under the condition of permission. In this way, even if there is a certain amount of wear between the arc portion of the sealing strip and the inner wall of the cylinder during long-term use, under the action of the radial pressure, the sealing strip will undergo a certain amount of radial deformation to ensure that its arc portion and the inner wall of the cylinder remain in sealing fit, thereby further ensuring the sealing performance and extending the service life at the same time.

[0072] Thus, in the specific embodiments of the present application, the above design, by enhancing the sealing performance, ensures the force transmitted from the ball nut 33 to the cable 5 direction, avoids the pulling force amplification mechanism 6 being interfered with or even losing the function of transmitting force due to the decrease in sealing performance, avoids the sealing performance decrease affecting the pulling force of the entire test device, and avoids the sealing performance decrease affecting the test results of the entire test device.

[0073] It should be noted that the specific model specifications of the driving motor 31, the transmission lead screw 32, the ball nut 33, and the tensile sensor 4 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0074] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cable tension test device, comprising a workbench (1), a cable clamp (2) and a driving mechanism (3), wherein a displacement end (22) of the cable clamp (2) is provided with linear displacement power by the driving mechanism (3), and a tension sensor (4) is arranged between the displacement end (22) and the moving end of the driving mechanism (3), characterized in that: Also includes: The driving mechanism (3) is provided with a tension amplifying mechanism (6), and the tension amplifying mechanism (6) is composed of piston cylinders with different diameters connected in series; The piston cylinder with a large diameter is fixedly connected to the workbench (1), and the piston rod thereon is fixedly connected to the displacement end (22); The piston cylinder with a smaller diameter is fixed to the piston cylinder with a larger diameter, and the piston rod therein is fixedly connected to the moving end of the driving mechanism (3); The pistons of the piston cylinders connected in series are filled with hydraulic oil, and holes communicating with the outside are arranged on both sides of the pistons of the piston cylinders connected in series.

2. A cable tension test device as claimed in claim 1, characterized in that: The cable clamp (2) further comprises a fixed end (21), wherein the fixed end (21) and the displacement end (22) have completely the same structure and size, and the fixed end (21) comprises: A base (211), the base (211) is fixedly connected to the workbench (1), and a plurality of wire grooves are arranged on an upper end surface of the base (211); A top cover (212), the top cover (212) being snap-connected to the base (211) and fixing the cable (5); A plurality of telescopic members (213), wherein the plurality of telescopic members (213) are fixedly connected to the base (211); A plurality of line-fixing support plates (214) are fixedly connected to the telescopic end of the telescopic member (213), and are inserted into the base (211) and then abut against the cable (5).

3. A cable tension test device as claimed in claim 1, characterized in that: The driving mechanism (3) comprises: A driving motor (31), wherein the driving motor (31) is fixedly connected to the workbench (1); A transmission screw (32), the transmission screw (32) being key-connected to the output shaft of the drive motor (31); A ball nut (33) is matched with the transmission screw (32) and is fixedly connected to the piston rod of the piston cylinder with a small inner diameter of the tension amplification mechanism (6).

4. A cable tension test device as claimed in claim 3, characterized in that: The piston cylinder with a small diameter in the tension amplification mechanism (6) is a thin cylinder body (61), and the piston cylinder with a large diameter is a thick cylinder body (62).

5. A cable tension test device as claimed in claim 4, characterized in that: The piston rod of the piston cylinder with a small diameter is a thin cylinder telescopic end (63), one end of which is slidably inserted into the thin cylinder body (61) and the other end is fixedly connected to the ball nut (33).

6. A cable tension test device as claimed in claim 4, characterized in that: The piston rod of the piston cylinder with a large diameter is a coarse cylinder telescopic end (65), one end of which is slidably inserted into the coarse cylinder body (62) and the other end is fixedly connected to the tension sensor (4).

7. A cable tension test device as claimed in claim 5, characterized in that: The thin cylinder telescopic end (63) comprises: A plurality of fine cylinder slide rods (631), the plurality of fine cylinder slide rods (631) being evenly arranged along the axial circumference of the fine cylinder body (61), and one end of the fine cylinder slide rods (631) inserted into the fine cylinder body (61) being fixedly connected to the piston of the fine cylinder body (61); A fine cylinder end transmission plate (632), wherein the fine cylinder end transmission plate (632) is fixedly connected to one end of the plurality of fine cylinder slide rods (631) extending out of the fine cylinder body (61).

8. A cable tension test device as claimed in claim 7, characterized in that: A transmission assembly (64) is provided between the ball nut (33) and the cylinder slide rod (631), and the transmission assembly (64) comprises: Two first transmission rods (641), the two first transmission rods (641) are symmetrically arranged and fixedly plugged into the side wall of the ball nut (33); A transmission sleeve (642), wherein the transmission sleeve (642) and the two first transmission rods (641) are fixedly connected; Two second transmission rods (643), the two second transmission rods (643) are fixedly plugged into one end of the transmission sleeve (642) away from the first transmission rod (641), and are slidably plugged into the outer wall of the rough cylinder body (62); Two connecting rods (644), the two connecting rods (644) are arranged in a V shape, and the two second transmission rods (643) are fixedly connected to the fine cylinder end transmission plate (632).

9. A cable tension test device as claimed in claim 8, characterized in that: The transmission sleeve plate (642) is slidably sleeved on the thin cylinder body (61).

10. A cable tension test device as claimed in claim 6, characterized in that: The telescopic end (65) of the rough cylinder comprises: A plurality of rough cylinder slide rods (651), wherein the plurality of rough cylinder slide rods (651) are evenly arranged along the axial and circumferential directions of the rough cylinder body (62), and one end of the rough cylinder slide rods (651) inserted into the rough cylinder body (62) is fixedly connected to the piston of the rough cylinder body (62); A rough cylinder end transmission plate (652), the rough cylinder end transmission plate (652) is fixedly connected to one end of the plurality of rough cylinder slide bars (651) extending out of the rough cylinder body (62), and is fixedly connected to the tension sensor (4).

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