A multi-section impact resistance detection system for wires and cables

Abstract

The present invention provides a multi-section impact resistance detection system for electric wires and cables, comprising a frame, wherein the frame is provided with a motor, an upper roller, a lower roller, a steel belt, a guide wheel, and an impact block. A central shaft is provided in the middle of the upper roller, the central shaft passes through the upper roller and is fixedly connected to the output end of the motor. When the upper roller rotates, the cable is clamped and the cable is moved. Fixed plates, a rope winding tube and a synchronous ring are provided on both ends of the central shaft. The central rod drives the synchronous ring to rotate. A first inclined plane is provided inside the rope winding tube, and a second inclined plane is provided outside the synchronous ring. When the first inclined plane is in contact with the second inclined plane, the synchronous ring drives the rope winding tube to rotate. When the second inclined plane is separated from the first inclined plane, the rope reel is reversed due to the gravity of the impact block, and the impact block automatically impacts the cable by continuously making the first inclined plane contact and separate from the second inclined plane.

Description

Technical Field

[0001] The present invention relates to cable manufacturing equipment, in particular to a multi-section impact resistance detection system for electric wires and cables. Background Art

[0002] Wires are conductive metal wires used to carry electric current, usually made of conductive material wrapped in insulating material. The manufacturing process of cables is to wrap multiple insulated wires together and then wrap a protective layer on the outside. Wrapping with protective layers of different materials can increase the strength, hardness, wear resistance, etc. of the cable, making it suitable for a variety of scenarios.

[0003] After being wrapped in a protective layer, the cable needs to be tested for impact resistance. The existing testing method is usually carried out manually by hitting the outside of the cable with an iron block, which is inefficient. Moreover, by manually raising the iron block, it is impossible to control the strength and position of each impact, resulting in low accuracy of the impact test results. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a multi-segment detection system for the impact resistance of wires and cables, which has the function of automatically detecting the impact resistance of wires and cables.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a multi-segment detection system for impact resistance of electric wires and cables, comprising a frame, wherein the frame is provided with a motor, an upper roller, a lower roller, a steel belt, a guide wheel, and an impact block, the motor is fixedly connected to the frame, a roller cavity is formed between the upper roller and the lower roller, the cable passes through the roller cavity, a central shaft is provided in the middle of the upper roller, the central shaft passes through the upper roller and is fixedly connected to the output end of the motor, a fixing plate, a rope winding tube and a synchronous ring are provided on both ends of the central shaft, the fixing plate is fixedly connected to the frame, the fixing plate is fixedly provided with a convex ring, the central shaft is rotatably connected to the convex ring, the rope winding tube is sleeved on the convex ring and rotatably connected to the convex ring, an inclined surface 1 is opened inside the rope winding tube, the synchronous ring is slidably connected to the central shaft and rotates coaxially, The outer side of the synchronous ring is provided with an inclined surface 2 and an inclined surface 3, and the inclined surface 1 is in contact with the inclined surface 2. A plurality of springs are provided between the end face of the synchronous ring and the end face of the upper roller. The fixed plate is also provided with a sliding hole 1, and a slider 1 is slidably provided in the sliding hole 1. The slider 1 is provided with an inclined surface 4 near one end of the upper roller, and the slider 1 is slidably provided with a steering block. The steering block is provided with an inclined surface 5 and an inclined surface 6, and the inclined surface 4 is in contact with the inclined surface 5, and the inclined surface 6 is in contact with the inclined surface 3. The fixed plate is fixedly provided with a baffle, which is against the upper end of the steering block, and the end of the slider 1 facing away from the steering block is fixed with a driving assembly. The guide wheel is fixedly provided on the upper side of the frame, one end of the steel belt is fixedly connected to the rope winding tube, and the other end is fixedly connected to the impact block, and the steel belt passes around the guide wheel.

[0006] By means of the above technical means, the upper roller is driven by the motor to rotate, so that the cable can be automatically moved and passed through the roller cavity. The spring 1 presses against the synchronous ring so that the inclined surface 2 is close to the inclined surface 1. Under the action of friction, the synchronous ring drives the rope winding tube to rotate, so as to realize the function of automatically winding the steel belt on the rope winding tube. When the steel belt is wound a certain number of times, the surface of the steel belt presses against the slider 1 and moves it upward, so that the inclined surface 4 is in contact with the inclined surface 5, and the inclined surface 3 is in contact with the inclined surface 6, so that the synchronous ring moves along the central axis in the direction of the upper roller, so that the inclined surface 1 is separated from the inclined surface 2, and the rope winding tube and the upper roller are driven to rotate relative to each other by the weight of the impact block. At this time, the driving assembly presses against the slider 1 to temporarily fix it. After the impact block impacts the cable, the driving assembly retracts, and the energy stored in the spring 1 is released to push the synchronous ring back and make the inclined surface 1 close to the inclined surface 2, thereby realizing repeated impact tests, improving the degree of automation, and increasing production efficiency. At the same time, the impact block can rise to a consistent height and the impact position can be uniform, so as to increase the accuracy of the test.

[0007] Preferably, the fixed plate is further provided with a second sliding hole, in which a second slider is slidingly arranged, the driving assembly includes a linkage rod, an extension rod 1, and an extension rod 2, the fixed plate is fixedly provided with a convex column, the linkage rod is rotatably connected to the convex column, and waist holes are provided at both ends of the linkage rod, the extension rod 1 and the extension rod 2 are connected to the waist holes, the extension rod 1 is fixedly connected to the slider 1, the extension rod 2 is fixedly connected to the slider 2, and a rope clamp is provided on the steel belt, and the rope clamp is against the slider 2.

[0008] Through the above technical means, the sliding of slider 2 is controlled by the rope clamp to prevent slider 1 from moving downward during the relative rotation of the rope winding tube, which causes the impact block to be interrupted from falling and an empty impact. At the same time, it prevents the steel belt from being worn out, resulting in a decrease in friction and the inability of slider 1 to move upward, causing the impact block to detach from the guide wheel and cause danger, thereby realizing the overtravel protection function.

[0009] Preferably, a bearing seat is provided at both ends of the central shaft, a bearing slot is opened on the frame, the bearing seat is slidably connected to the bearing slot, and the bearing seat is connected to the frame by screws.

[0010] Through the above technical means, the upper roller can be moved upward and removed, realizing the function of replaceable upper roller, increasing the applicability of the equipment, making the equipment suitable for more types of cables, and connected to the frame through the bearing seat 1 screw to prevent vibration during impact that causes the cable to stop moving.

[0011] Preferably, the frame is further fixedly provided with a pair of guide rails, the inner sides of the guide rails are provided with guide grooves, and the impact block is slidably connected to the guide grooves.

[0012] Through the above technical means, the impact block impacts the cable along the guide groove, preventing the guide groove from swinging and deviating, thereby increasing the safety of the equipment and making the impact position the same, thereby increasing the rigor of the equipment.

[0013] Preferably, the frame is further provided with an impact baffle, which is arranged between the guide rails, and a cable groove is opened on the impact top, the cable groove is fitted with the cable, and the impact baffle is bolted to the frame.

[0014] Through the above technical means, the bottom of the cable is relatively fixed by the impact baffle, which reduces the influence of cable toughness on impact performance and increases the rigor of the experiment. The impact baffle is connected to the frame by bolts, which makes it easy to replace the impact baffle, making the equipment suitable for different types of cables and increasing its applicability.

[0015] Preferably, a pressure plate and a second spring are provided on the inner side of the guide rail, the pressure plate is slidably connected to the guide groove, and the second spring is provided at the bottom of the pressure plate.

[0016] Through the above technical means, the impact block hits the pressure plate and then hits the cable through the pressure plate, preventing the steel belt from becoming longer as the use time increases, resulting in increased winding time, so that the impact block stays on the cable for too long, causing cable wear or the cable to be unable to move, thereby increasing the yield rate of the cable.

[0017] Preferably, the frame is also provided with a detection component, which includes a fixed platform, a pressure roller, a roller seat, a spring three and a sliding rheostat. The fixed platform is fixedly connected to the frame, one end of the fixed platform is slidingly connected to the roller seat, and the other end is fixedly connected to the sliding rheostat. The pressure roller is rotatably connected to the roller seat, the pressure roller presses against the cable and rolls with the cable, and the spring three is arranged between the roller seat and the fixed platform.

[0018] Through the above technical means, the pressure roller is pressed against the cable through spring three. When the cable is deformed, the roller seat moves toward the fixed platform and presses against the input end of the sliding resistor. The deformation parameters of the cable when it is impacted are recorded through the sliding resistor to realize automatic detection.

[0019] Preferably, bearing seats 2 are provided on both sides of the lower roller, bearing slots 2 are opened on the frame, bearing seats 2 are slidingly connected to bearing slots 2, a screw is provided at the bottom of bearing slots 2, and the screw rests against the bottom of bearing seats 2.

[0020] Through the above technical means, the position of the lower roller is controlled by the screw to realize the function of clamping the cable. When the cable size changes slightly, the size of the roller cavity can be directly changed, making the use of the equipment more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment;

[0022] Figure 2 A partial view of an embodiment;

[0023] Figure 3 for Figure 2 A magnified view of part A;

[0024] Figure 4 Partial cross-section of the central axis Figure 1 ;

[0025] Figure 5 Partial cross-section of the central axis Figure 2 ;

[0026] Figure 6 is a partial schematic diagram of the central axis;

[0027] Figure 7 It is a partial schematic diagram of the steel strip;

[0028] Figure 8 It is a structural diagram of the drive component;

[0029] Figure 9 A partial cross-sectional view of an embodiment;

[0030] Figure 10 is a cross-sectional schematic diagram of the guide rail;

[0031] Figure 11 A cross-sectional schematic diagram of the detection component.

[0032] Figure 1: Frame; 2: Motor; 3: Upper Roller; 4: Lower Roller; 5: Steel Belt; 6: Guide Wheel; 7: Impact Block; 8: Roller Cavity; 9: Center Shaft; 10: Fixed Plate; 11: Rope Tube; 12: Synchronizing Ring; 13: Convex Ring; 14: Inclined Plane 1; 15: Inclined Plane 2; 16: Inclined Plane 3; 17: Spring 1; 18: Sliding Hole 1; 19: Slider 1; 20: Inclined Plane 4; 21: Steering Block; 22: Inclined Plane 5; 23: Inclined Plane 6; 24: Baffle; 25: Sliding Hole 2 ; 26. Slider 2; 27. Linkage rod; 28. Extension rod 1; 29. ​​Extension rod 2; 30. Boss; 31. Waist hole; 32. Rope clamp; 33. Bearing seat 1; 34. Bearing slot 1; 35. Guide rail; 36. Guide slot; 37. Impact baffle; 38. Cable slot; 39. Pressure plate; 40. Spring 2; 41. Fixed table; 42. Pressure roller; 43. Roller seat; 44. Spring 3; 45. Sliding rheostat; 46. Bearing seat 2; 47. Bearing slot 2; 48. Screw. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0034] A multi-section shock resistance detection system for wires and cables, such as Figures 1 to 6As shown, it includes a frame 1, the frame 1 is provided with a motor 2, an upper roller 3, a lower roller 4, a steel belt 5, a guide wheel 6, and an impact block 7. The motor 2 is fixedly connected to the frame 1, and a roller cavity 8 is formed between the upper roller 3 and the lower roller 4. The cable passes through the roller cavity 8. A central shaft 9 is provided in the middle of the upper roller 3. The central shaft 9 passes through the upper roller 3 and is fixedly connected to the output end of the motor 2. When the upper roller 3 rotates, the cable is clamped and moved. A fixed plate 10, a rope tube 11 and a synchronous ring 12 are provided on both ends of the central shaft 9. The fixed plate 10 is fixedly connected to the frame 1. The fixed plate 10 is fixedly provided with a convex ring 13. The central shaft 9 is rotatably connected to the convex ring 13. The rope tube 11 is sleeved on the convex ring 13 and rotatably connected to the convex ring 13. The rope tube 11 is provided with an inclined surface 14 inside the rope tube 11. The central shaft 9 is provided with a keyway, the synchronizer ring 12 is slidably connected to the central shaft 9 and rotates synchronously, the outer side of the synchronizer ring 12 is provided with a second inclined surface 15 and a third inclined surface 16, the first inclined surface 14 is fitted with the second inclined surface 15, and the first inclined surface 14 and the second inclined surface 15 are made of a material with a large friction coefficient, usually rubber, and a plurality of springs 17 are provided between the end face of the synchronizer ring 12 and the end face of the upper roller 3. The spring 17 presses against the synchronizer ring 12 to make the first inclined surface 14 fit with the second inclined surface 15. The fixed plate 10 is also provided with a sliding hole 18, and a slider 19 is slidably provided in the sliding hole 18. The side of the slider 19 close to the central shaft 9 is a rubber surface, and the end of the slider 19 close to the upper roller 3 is provided with a fourth inclined surface 20, and the slider 19 is slidably provided with a steering block 21. The steering block 21 is provided with a bevel five 22 and a bevel six 23, the bevel four 20 is fitted with the bevel five 22, the bevel six 23 is fitted with the bevel three 16, the fixed plate 10 is fixed with a baffle 24, the baffle 24 is against the upper end of the steering block 21, and the slider one 19 is fixed with a driving assembly at one end away from the steering block 21. When the rope tube 11 is winding the steel belt 5, the distance between the steel belt 5 and the slider one 19 is gradually shortened. When the steel belt 5 is close to the slider one 19, the rotation of the rope tube 11 will drive the slider one 19 to move upward, and the driving assembly will resist the slider one 19 so that it cannot move back downward. By fitting the bevel four 20 with the bevel five 22, the steering block 21 moves toward the synchronizer ring 12, and by fitting the bevel three 16 with the bevel six 23, the synchronizer ring 12 moves toward the upper roller 3. At this time, the spring 17 is compressed and stores elastic energy. The inclined plane 14 is separated from the inclined plane 2 15. The synchronous ring 12 continues to rotate, the rope tube 11 stops rotating, the tension on the impact block 7 disappears and falls downward due to gravity, driving the rope tube 11 and the upper roller 3 to rotate relative to each other. When the impact block 7 impacts the cable, the driving assembly is restored, the slider 19 moves downward, the elastic energy stored in the spring 17 is released and the inclined plane 14 is re-fitted with the inclined plane 2 15, and the steel belt 5 is repeatedly wound. The guide wheel 6 is fixedly set on the upper side of the frame 1. Lugs are provided on both sides of the guide wheel 6 to prevent the steel belt 5 from detaching from the guide wheel 6. One end of the steel belt 5 is fixedly connected to the rope tube 11, and the other end is fixedly connected to the impact block 7. The steel belt 5 passes around the guide wheel 6.

[0035] like Figure 7 、 Figure 8 As shown, the fixed plate 10 is further provided with a sliding hole 25, a magnet is provided at the bottom of the sliding hole 25, a slider 26 is provided in the sliding hole 25, and the driving assembly includes a linkage rod 27, an extension rod 1 28, and an extension rod 29. The fixed plate 10 is fixed with a boss 30, and the linkage rod 27 is rotatably connected to the boss 30. Both ends of the linkage rod 27 are provided with waist holes 31, and the extension rod 1 28 and the extension rod 29 are connected to the waist holes 31. The extension rod 1 28 is fixedly connected to the slider 19, and the extension rod 29 is fixed to the slider 2 6 is fixedly connected, and a rope clamp 32 is provided on the steel belt 5. The rope clamp 32 abuts against the slider 2 26. When the steel belt 5 is wound to a certain number of turns but has not yet caused the slider to move upward, the rope clamp 32 will drive the slider 2 26 to move downward and cause the slider 2 26 to be attracted to the magnet. The slider 2 26 drives the extension rod 2 29 to move downward and causes the linkage rod 27 to rotate. The linkage rod 27 drives the extension rod 1 28 to move upward, thereby realizing the overtravel protection function. When the impact block 7 impacts the cable, the slider 2 26 is lifted by the rope clamp 32, causing the slider 1 19 to reset.

[0036] like Figure 1 、 Figure 2 、 Figure 9 As shown, bearing seats 33 are provided at both ends of the central shaft 9, and a bearing groove 34 is provided on the frame 1. The bearing seat 33 is slidingly connected to the bearing groove 34. A threaded hole is provided on the bearing seat 33, and a through hole is provided in the bearing groove. The bearing seat 33 is connected to the frame 1 by screws. The upper roller 3 can be moved upward and taken out by removing the screws, thereby realizing the replaceable function of the upper roller 3, increasing the applicability of the equipment, and making the equipment suitable for more types of cables.

[0037] like Figure 1 As shown, the rack 1 is also fixed with a pair of guide rails 35, which are fixedly connected to the rack 1 by angle steels. A guide groove 36 is provided on the inner side of the guide rail 35. The impact block 7 is slidably connected to the guide groove 36 and impacts the cable along the guide groove 36 to prevent the guide groove 36 from swinging and deviating, thereby increasing the safety of the equipment and making the impact position the same, thereby increasing the rigor of the equipment.

[0038] like Figure 1 、 Figure 10 As shown, the rack 1 is further provided with an impact baffle 37, which is arranged between the guide rails 35. A cable groove 38 is provided on the top of the impact baffle 37, and the cable groove 38 fits the cable. The impact baffle 37 makes the bottom of the cable relatively fixed, reducing the influence of the cable toughness on the impact performance and increasing the rigor of the experiment. The impact baffle 37 is bolted to the rack 1, so that the impact baffle 37 can be easily replaced, making the equipment suitable for different types of cables and increasing applicability.

[0039] like Figure 1 、 Figure 10As shown, a pressure plate 39 and a spring 2 40 are provided on the inner side of the guide rail 35. The pressure plate 39 is slidably connected to the guide groove 36. The spring 2 40 is provided at the bottom of the pressure plate 39. The impact block 7 hits the pressure plate 39 and applies an impact force, so that the spring 2 40 is compressed and elastic energy is generated. When the pressure plate 39 impacts the cable, the elastic energy will generate an upward rebound force, so that the pressure between the pressure plate 39 and the cable is reduced. By replacing different springs 2 40, the magnitude of the impact force can be controlled. At the same time, the winding time of the steel belt 5 can be increased due to the increase in the length of the side as the use time increases, so that the impact block 7 stays on the cable for too long, resulting in cable wear or the cable being unable to move, thereby increasing the yield rate of the cable.

[0040] like Figure 1 、 Figure 11 As shown, the frame 1 is also provided with a detection component, which is respectively set up on the left and right sides and the top side of the cable. The detection component includes a fixed platform 41, a pressure roller 42, a roller seat 43, a spring three 44 and a sliding rheostat 45. The fixed platform 41 is fixedly connected to the frame 1, one end of the fixed platform 41 is slidingly connected to the roller seat 43, and the other end is fixedly connected to the sliding rheostat 45. The pressure roller 42 is rotatably connected to the roller seat 43, and the pressure roller 42 presses against the cable and rolls with the cable. The spring three 44 is set between the roller seat 43 and the fixed platform 41. When the cable is deformed, the pressure roller 42 drives the roller seat 43 to move and makes the roller seat 43 touch the input end of the sliding rheostat 45, thereby converting the physical displacement into an electrical signal and recording it to form the deformation parameters of the cable. By setting up detection devices on the left, right and top of the cable, the influence of the straightness of the cable on the impact strength is reduced. When the width increases and the height decreases at the same time, the detection result takes effect.

[0041] like Figure 2 、 Figure 9 As shown, bearing seats 46 are provided on both sides of the lower roller 4, and a bearing groove 47 is opened on the frame 1. The bearing seat 46 is slidingly connected with the bearing groove 47. A screw 48 is provided at the bottom of the bearing groove 47. The screw 48 is against the bottom of the bearing seat 46. The position of the lower roller 4 is controlled by the screw 48 to realize the function of clamping the cable.

[0042] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A multi-section shock resistance detection system for electric wires and cables, comprising a frame (1), characterized in that: The frame (1) is provided with a motor (2), an upper roller (3), a lower roller (4), a steel belt (5), a guide wheel (6), and an impact block (7); the motor (2) is fixedly connected to the frame (1); a roller cavity (8) is formed between the upper roller (3) and the lower roller (4); a cable passes through the roller cavity (8); a central shaft (9) is provided in the middle of the upper roller (3); the central shaft (9) passes through the upper roller (3) and is fixedly connected to the output end of the motor (2); both ends of the central shaft (9) are provided with a fixing plate (10), a rope winding tube (11) and a same The step ring (12) is fixedly connected to the frame (1), the fixed plate (10) is fixedly provided with a convex ring (13), the central shaft (9) is rotatably connected to the convex ring (13), the rope winding tube (11) is sleeved on the convex ring (13) and rotatably connected to the convex ring (13), the rope winding tube (11) is provided with an inclined plane 1 (14) inside, the synchronous ring (12) is slidably connected to the central shaft (9) and rotates coaxially, the outer side of the synchronous ring (12) is provided with an inclined plane 2 (15) and an inclined plane 3 (16), the inclined plane The first surface (14) is fitted with the second inclined surface (15), and a plurality of springs (17) are provided between the end surface of the synchronization ring (12) and the end surface of the upper roller (3). The fixed plate (10) is also provided with a sliding hole (18), and a slider (19) is provided in the sliding hole (18) for sliding. The slider (19) is provided with an inclined surface (20) near one end of the upper roller (3). The slider (19) is provided with a steering block (21) for sliding. The steering block (21) is provided with an inclined surface (22) and an inclined surface (23). The inclined surface (20) The fixed plate (10) is fixed with a baffle (24), and the baffle (24) is against the upper end of the steering block (21). The slider (19) is fixed with a driving assembly at one end away from the steering block (21). The guide wheel (6) is fixedly provided on the upper side of the frame (1). One end of the steel belt (5) is fixedly connected to the rope winding tube (11), and the other end is fixedly connected to the impact block (7). The steel belt (5) passes around the guide wheel (6).

2. The multi-stage detection system for shock resistance of electric wires and cables according to claim 1, characterized in that: The fixed plate (10) is also provided with a second sliding hole (25), in which a second slider (26) is slidingly provided. The driving assembly includes a linkage rod (27), an extension rod (28), and an extension rod (29). The fixed plate (10) is fixedly provided with a boss (30). The linkage rod (27) is rotatably connected to the boss (30). Both ends of the linkage rod (27) are provided with waist holes (31). The extension rod (28) and the extension rod (29) are connected to the waist holes (31). The extension rod (28) is fixedly connected to the first slider (19), and the extension rod (29) is fixedly connected to the second slider (26). A rope clamp (32) is provided on the steel belt (5), and the rope clamp (32) is against the second slider (26).

3. The multi-stage detection system for shock resistance of electric wires and cables according to claim 1, characterized in that: A bearing seat (33) is provided at both ends of the central shaft (9), a bearing groove (34) is provided on the frame (1), the bearing seat (33) is slidably connected to the bearing groove (34), and the bearing seat (33) is connected to the frame (1) by screws.

4. The multi-stage detection system for shock resistance of electric wires and cables according to claim 1, characterized in that: The frame (1) is also fixedly provided with a pair of guide rails (35), the inner sides of the guide rails (35) are provided with guide grooves (36), and the impact block (7) is slidably connected to the guide grooves (36).

5. The multi-stage detection system for shock resistance of electric wires and cables according to claim 4, characterized in that: The frame (1) is further provided with an impact baffle (37), which is arranged between the guide rails (35). A cable groove (38) is provided on the top of the impact baffle (37), the cable groove (38) is fitted with the cable, and the impact baffle (37) is bolted to the frame (1).

6. The multi-stage detection system for electric wire and cable impact resistance according to claim 4, characterized in that: A pressure plate (39) and a second spring (40) are provided on the inner side of the guide rail (35). The pressure plate (39) is slidably connected to the guide groove (36). The second spring (40) is provided at the bottom of the pressure plate (39).

7. The multi-stage detection system for impact resistance of electric wires and cables according to claim 1, characterized in that: The frame (1) is further provided with a detection component, which includes a fixed platform (41), a pressure roller (42), a roller seat (43), a spring three (44) and a sliding rheostat (45). The fixed platform (41) is fixedly connected to the frame (1), one end of the fixed platform (41) is slidingly connected to the roller seat (43), and the other end is fixedly connected to the sliding rheostat (45). The pressure roller (42) is rotatably connected to the roller seat (43), the pressure roller (42) presses against the cable and rolls with the cable, and the spring three (44) is arranged between the roller seat (43) and the fixed platform (41).

8. The multi-stage detection system for electric wire and cable impact resistance according to claim 1, characterized in that: Two bearing seats (46) are provided on both sides of the lower roller (4), and a second bearing groove (47) is provided on the frame (1). The second bearing seat (46) is slidably connected to the second bearing groove (47), and a screw (48) is provided at the bottom of the second bearing groove (47), and the screw (48) is against the bottom of the second bearing seat (46).

Images