A high-flex cable bending fatigue testing device

Abstract

The utility model relates to the technical field of bending fatigue test, especially to a high flexible cable bending fatigue test device. Adopt the following scheme: a kind of high flexible cable bending fatigue test device, including, work bench, spool and adjustable bending mechanism;The both ends of work bench are respectively fixed with support frame, and the top of support frame is fixed with connecting rod;Spool is coaxially arranged on connecting rod, for fixing the end of high flexible cable;Adjustable bending mechanism is slidably arranged in the middle part of work table, for bending high flexible cable.The utility model provides a kind of high flexible cable bending fatigue test device, solves the technical problem that the existing bending fatigue test device cannot replace test point.

Description

Technical Field

[0001] This utility model relates to the field of bending fatigue testing technology, and in particular to a bending fatigue testing device for highly flexible cables. Background Technology

[0002] Cable bending fatigue testing is a method for evaluating the durability of wires and cables under repeated bending conditions. It is widely used in industrial robot cables, charging interface cables, cable carrier systems, and other applications.

[0003] Cable bending fatigue testing is conducted on a bending testing machine. Most existing bending testing machines fix both ends of the cable to fixed seats, and then bring the two fixed seats together to bend the cable. When it is necessary to change the test point of the cable, the cable needs to be removed and reinstalled, which is time-consuming and labor-intensive. Utility Model Content

[0004] This invention provides a high-flexibility cable bending fatigue testing device, which solves the technical problem that existing bending fatigue testing devices cannot change the test points.

[0005] To achieve this technical objective, the present invention adopts the following solution: a high-flexibility cable bending fatigue testing device, comprising a worktable, a bobbin, and an adjustable bending mechanism;

[0006] Support frames are fixed at both ends of the workbench, and connecting rods are fixed at the top of the support frames;

[0007] The spool is coaxially mounted on the connecting rod to fix the end of the high-flexibility cable;

[0008] An adjustable bending mechanism is slidably mounted in the middle of the workbench for bending highly flexible cables.

[0009] Furthermore, the spool includes an inner cylinder, a coil spring, and an outer cylinder;

[0010] The inner cylinder is coaxially fixed outside the connecting rod, and limit rings are fixed at both ends of the inner cylinder;

[0011] The outer cylinder is rotatably set outside the inner cylinder. A limit groove is opened on the inner wall of the outer cylinder. A limit ring is slidably set in the limit groove. Both ends of the outer cylinder are fixed with baffles, and a high-flexibility cable is provided between the two baffles.

[0012] The coil spring is positioned between the inner cylinder and the outer cylinder, and both ends of the coil spring are fixedly connected to the inner cylinder and the outer cylinder, respectively.

[0013] Furthermore, the adjustable bending mechanism includes two symmetrically distributed sliding bases and a transmission mechanism;

[0014] The bottom of the sliding base is fixed with a locking block, which is slidably set in a through groove in the middle of the workbench. The top of the sliding base is provided with a sliding groove extending along its length, and the bottom of the sliding groove is provided with insertion holes evenly distributed along its length.

[0015] A compression roller is inserted into the socket;

[0016] The transmission mechanism is connected to the sliding base and is used to drive the sliding base to slide along the extension direction of the through groove.

[0017] Furthermore, the extrusion roller includes a slider, which is slidably disposed within a groove;

[0018] A hollow support column is fixed at the top of the slider. A vertically extending clearance groove is opened on the side of the support column. A plug rod is slidably inserted inside the support column. The bottom of the plug rod passes through the slider and is inserted into the plug hole.

[0019] A lever is fixedly provided on the side wall of the insertion rod. The lever can slide through the clearance groove and extend to the outside of the support column. An annular plate is fixedly provided on the rod body of the insertion rod. A compression spring is sleeved on the upper part of the insertion rod. The two ends of the compression spring abut against the annular plate and the inner top surface of the support column, respectively.

[0020] The top of the support column is fixed with the pressure roller body.

[0021] Furthermore, the transmission mechanism includes a cylinder that is fixedly mounted on the workbench and extends in the same direction as the through groove. A fixed rod is fixedly mounted on the movable end of the cylinder, and a sliding base is fixedly connected to both ends of the fixed rod.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model discloses a high-flexibility cable bending fatigue testing device that uses an adjustable bending mechanism to replace the traditional method of bending the cable by bringing the cable support bases closer together. This utility model achieves cable bending by moving the adjustable bending mechanism, and the test point can be changed by changing the contact position between the adjustable bending mechanism and the cable. It is convenient to use and easy to adjust. Attached Figure Description

[0024] Figure 1 A schematic diagram of a high-flexibility cable bending fatigue testing device provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the spool provided in this embodiment of the utility model:

[0026] Figure 3 A schematic diagram of the extrusion roller provided in an embodiment of this utility model;

[0027] Figure 4This is another schematic diagram of a high-flexibility cable bending fatigue testing device provided for an embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Workbench; 11. Support frame; 12. Connecting rod; 13. Through groove; 2. Bollard; 21. Inner cylinder; 211. Limiting ring; 22. Coil spring; 23. Outer cylinder; 231. Limiting groove; 232. Baffle; 3. Adjustable bending mechanism; 31. Sliding base; 32. Locking block; 33. Slide groove; 34. Insertion hole; 35. Extrusion roller; 351. Sliding block; 352. Support column; 353. Clearance groove; 354. Inserting rod; 355. Annular plate; 356. Compression spring; 357. Pressure roller body; 358. Lever; 36. Transmission mechanism; 361. Cylinder; 362. Fixing rod. Detailed Implementation

[0030] To fully understand the purpose, features and effects of this utility model, the following specific embodiments will be used to describe this utility model in detail, but this utility model is not limited thereto.

[0031] like Figures 1 to 4 As shown, the present invention provides a high-flexibility cable bending fatigue testing device, comprising a workbench 1, a bobbin 2, and an adjustable bending mechanism 3. Support frames 11 are fixedly mounted at both ends of the workbench 1, and a connecting rod 12 is fixedly mounted on the top of the support frames 11.

[0032] A spool 2 is coaxially mounted on the connecting rod 12 and is used to fix the end of the high-flexibility cable. The spool 2 includes an inner cylinder 21, a coil spring 22, and an outer cylinder 23. The inner cylinder 21 is coaxially fixed to the outside of the connecting rod 12, and limiting rings 211 are fixed at both ends of the inner cylinder 21. The outer cylinder 23 is rotatably mounted outside the inner cylinder 21. In one embodiment, a limiting groove 231 is formed on the inner wall of the outer cylinder 23, and a limiting ring 211 is slidably mounted within the limiting groove 231. Baffles 232 are fixed at both ends of the outer cylinder 23, and the high-flexibility cable is positioned between the two baffles 232. The coil spring 22 is positioned between the inner cylinder 21 and the outer cylinder 23, and both ends of the coil spring 22 are fixedly connected to the inner cylinder 21 and the outer cylinder 23, respectively.

[0033] The adjustable bending mechanism 3 is slidably disposed in the middle of the workbench 1 for bending highly flexible cables.

[0034] The adjustable bending mechanism 3 includes two symmetrically distributed sliding bases 31 and a transmission mechanism 36. A locking block 32 is fixed to the bottom of each sliding base 31, and the locking block 32 is slidably disposed within a through groove 13 located in the middle of the worktable 1. A sliding groove 33 extending along the length direction is formed on the top of each sliding base 31, and insertion holes 34 evenly spaced along the length direction are formed on the bottom of the sliding groove 33. An extrusion roller 35 is inserted into each insertion hole 34. The transmission mechanism 36 is connected to the sliding base 31 and drives the sliding base 31 to slide along the extension direction of the through groove 13.

[0035] Furthermore, the extrusion roller 35 includes a slider 351, which is slidably disposed within the groove 33;

[0036] A hollow support column 352 is fixed on the top of the slider 351. A vertically extending clearance groove 353 is opened on the side of the support column 352. A plug rod 354 is slidably inserted into the support column 352. The bottom of the plug rod 354 passes through the slider 351 and is inserted into the plug hole 34.

[0037] A lever 358 is fixedly provided on the side wall of the insertion rod 354. The lever 358 can slide through the clearance groove 353 and extend to the outside of the support column 352. An annular plate 355 is fixedly provided on the rod body of the insertion rod 354. A compression spring 356 is sleeved on the upper part of the insertion rod 354. The two ends of the compression spring 356 abut against the annular plate 355 and the inner top surface of the support column 352, respectively.

[0038] The top of the support column 352 is fixed with the pressure roller body 357.

[0039] Furthermore, the transmission mechanism 36 includes a cylinder 361 fixedly mounted on the workbench 1 and extending in the same direction as the through groove 13. A fixed rod 362 is fixedly mounted on the movable end of the cylinder 361, and a sliding base 31 is fixedly connected to both ends of the fixed rod 362.

[0040] In use, first tie both ends of the cable to be tested to the spools 2 at both ends. At this time, the coil spring 22 is slightly deformed. Then, lift the lever 358 with one hand. The lever 358 drives the insertion rod 354 to move upward, so that the insertion rod 354 leaves the insertion hole 34. This allows the slider 351 to slide in the groove 33, thereby adjusting the position of the pressure roller body 357. The two pressure roller bodies 357 then press against the front and rear sides of the cable respectively. Then, start the cylinder 361. The cylinder 361 drives the fixed rod 362 to move, thereby driving the sliding base 31 to slide, which in turn drives the pressure roller body 357 to move. The pressure roller body 357 bends the highly flexible cable, and at this time, the coil spring 22 is further deformed.

[0041] By setting the coil spring 22, the length of the high-flexibility cable between the two spools 2 is increased during the bending process of the high-flexibility cable by the pressure roller body 357, thus preventing the high-flexibility cable from breaking.

[0042] When it is necessary to change the test point, simply replace the groove 33 corresponding to the squeeze roller 35. In other words, with Figure 1 For example, in the first test, the extrusion roller 35 can be set in the left groove 33, while the extrusion roller 35 is not set in the right groove 33; in the second test, the extrusion roller 35 in the left groove 33 is removed, and the extrusion roller 35 is installed in the right groove 33, thereby changing the position of the test point.

[0043] It is understood that the slider 351 can only be removed from the openings at both ends of the slide groove 33, but cannot be removed from the top of the slide groove 33, thereby preventing the extrusion roller 35 from falling out of the slide groove 33 during the bending of the high-flexibility cable. The structure of the slide groove 33 and the slider 351 is prior art, and this application does not limit it.

[0044] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A bending fatigue testing device for highly flexible cables, characterized in that, Includes a worktable (1), a bobbin (2), and an adjustable bending mechanism (3). The workbench (1) is fixed with support frames (11) at both ends, and a connecting rod (12) is fixed with the top of the support frame (11). The spool (2) is coaxially mounted on the connecting rod (12) for fixing the end of the high-flexibility cable; The adjustable bending mechanism (3) is slidably disposed in the middle of the workbench (1) for bending the high-flexibility cable; The adjustable bending mechanism (3) includes two symmetrically distributed sliding bases (31) and a transmission mechanism (36). The sliding base (31) has a locking block (32) fixed at the bottom. The locking block (32) is slidably disposed in the through groove (13) in the middle of the workbench (1). The top of the sliding base (31) has a sliding groove (33) extending along its length direction. The bottom of the sliding groove (33) has insertion holes (34) evenly distributed along its length direction. A compression roller (35) is inserted into the insertion hole (34); The transmission mechanism (36) is connected to the sliding base (31) and is used to drive the sliding base (31) to slide along the extension direction of the through groove (13).

2. The high-flexibility cable bending fatigue testing device according to claim 1, characterized in that, The spool (2) includes an inner cylinder (21), a coil spring (22), and an outer cylinder (23); The inner cylinder (21) is coaxially fixed outside the connecting rod (12), and limiting rings (211) are fixed at both ends of the inner cylinder (21). The outer cylinder (23) is rotatably disposed outside the inner cylinder (21). A limiting groove (231) is provided on the inner wall of the outer cylinder (23). A limiting ring (211) is slidably disposed in the limiting groove (231). Baffles (232) are fixedly provided at both ends of the outer cylinder (23). The high-flexibility cable is disposed between the two baffles (232). The coil spring (22) is disposed between the inner cylinder (21) and the outer cylinder (23), and the two ends of the coil spring (22) are fixedly connected to the inner cylinder (21) and the outer cylinder (23) respectively.

3. The high-flexibility cable bending fatigue testing device according to claim 2, characterized in that, The extrusion roller (35) includes a slider (351) which is slidably disposed within the groove (33); The top of the slider (351) is fixed with a hollow support column (352), and the side of the support column (352) is provided with a vertically extending clearance groove (353). A plug rod (354) is slidably inserted into the support column (352), and the bottom of the plug rod (354) passes through the slider (351) and is inserted into the plug hole (34). A lever (358) is fixedly provided on the side wall of the insertion rod (354). The lever (358) can slide through the relief groove (353) and extend to the outside of the support column (352). An annular plate (355) is fixedly provided on the rod body of the insertion rod (354). A compression spring (356) is sleeved on the upper part of the insertion rod (354). The two ends of the compression spring (356) abut against the annular plate (355) and the inner top surface of the support column (352), respectively. The top of the support column (352) is fixed with a pressure roller body (357).

4. The high-flexibility cable bending fatigue testing device according to claim 3, characterized in that, The transmission mechanism (36) includes a cylinder (361) fixedly mounted on the workbench (1) and extending in the same direction as the through groove (13). The movable end of the cylinder (361) is fixedly provided with a fixing rod (362), and the two ends of the fixing rod (362) are respectively fixedly connected to the sliding base (31).

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