A bending test device around an axis

Abstract

The present invention relates to the technical field of detection equipment, and discloses a shaft-winding bending test device, which includes a machine shell, a bending system and a driving system. The bending system includes a fixing mechanism and a rotating mechanism. The fixing mechanism includes a base, a first clamping assembly and a bending test shaft. The first clamping assembly is arranged at the bottom end of the base, and the bending test shaft is arranged at the top end of the base. The rotating mechanism includes a rotating frame, a second clamping assembly and a pressing roller. The rotating frame is arranged on the base and is connected to the driving system. The second clamping assembly and the pressing roller are both arranged on the rotating frame. One end of the test plate is clamped by the first clamping assembly, the test plate is passed through between the bending test shaft and the pressing roller, and the other end of the test plate is clamped by the second clamping assembly. The driving system is used to control the periodic reciprocating motion of the rotating frame, so as to realize that the bending part of the test plate bends back and forth along a preset angle on the bending test shaft, effectively avoiding the influence of human factors on the test results.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and particularly relates to a shaft-wrapping bending test device. Background Art

[0002] An automatic cylindrical bending tester is an instrument for an empirical test method that evaluates the cracking resistance and / or the peeling performance from a metal or plastic substrate when a coating of paint, varnish or related products bends around a cylindrical axis under standard conditions according to the standards GB / T 6742-2007 / ISO1519:2002. The cylindrical bending tester uses a pass / fail representation as the test result. The cylindrical bending tester conducts tests with test shaft rods of a specified diameter to evaluate whether the coating meets specific requirements; or conducts tests with test shaft rods of different diameters in sequence to determine the maximum test shaft rod at which the coating cracks and / or peels off from the substrate. The cylindrical bending tester requires the bending part to rotate 180° at a constant speed within 1S to 2S, so that the vertical test plate also bends 180°.

[0003] At present, when testing with a cylindrical bending tester on the market, the bending component is rotated manually for testing. During the test, the time is not easy to control, and a constant speed cannot be achieved. Even the same tester cannot ensure that the test processes before and after are the same. Such human errors will affect the accuracy of the test results and the reproducibility of the test process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to realize an automatic bending test for a test plate.

[0005] To solve the above technical problem, the present invention provides a shaft-wrapping bending test device, which includes a machine shell, a bending system and a driving system arranged on the machine shell;

[0006] The bending system includes a fixing mechanism and a rotating mechanism arranged on the fixing mechanism. The fixing mechanism includes a base, a first clamping assembly and a bending test shaft. The base is arranged on the machine shell, the first clamping assembly is arranged at the bottom end of the base, and the bending test shaft is arranged at the top end of the base. The rotating mechanism includes a rotating frame, a second clamping assembly and a pressing roller. The rotating frame is arranged on the base and is connected to the driving system. The second clamping assembly and the pressing roller are both arranged on the rotating frame.

[0007] As a preferred solution, the base includes a bottom plate, a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are oppositely arranged on the bottom plate. The first clamping assembly is arranged between the first mounting plate and the second mounting plate. The bending test shaft straddles between the top end of the first mounting plate and the top end of the second mounting plate;

[0008] The first clamping assembly includes a first fixing plate, a first clamping plate and a first adjusting screw. The first fixing plate is fixedly arranged between the first mounting plate and the second mounting plate. There is a cross beam between the first mounting plate and the second mounting plate. One end of the first adjusting screw is connected to the first clamping plate, and the other end of the first adjusting screw is threadedly connected to the cross beam.

[0009] As a preferred solution, a first side plate and a second side plate are provided on the rotating frame, and the second clamping assembly and the pressing roller straddle between the first side plate and the second side plate.

[0010] As a preferred solution, first sliding grooves for installing the second clamping assembly are provided on both the first side plate and the second side plate. A reset assembly is further provided between the second clamping assembly and the rotating frame;

[0011] The rotating frame is provided with second sliding grooves for installing the first side plate and the second side plate. A connecting block is provided between the first side plate and the second side plate, and an adjusting assembly is provided between the connecting block and the rotating frame.

[0012] As a preferred solution, the reset assembly includes an elastic member and a pulley. One end of the elastic member is connected to the second clamping assembly, the other end of the elastic member is connected to the connecting block, the pulley is arranged on the rotating frame, and the elastic member is wound around the pulley;

[0013] The adjusting assembly includes a second adjusting screw. One end of the second adjusting screw is threadedly connected to the connecting block, and the other end of the second adjusting screw is connected to the rotating frame.

[0014] As a preferred solution, the second clamping assembly includes a second fixing plate, a second clamping plate and a bolt. Both ends of the second fixing plate are slidably arranged in the first sliding groove. The second clamping plate is provided with a hole for the bolt to pass through, and the bolt is threadedly connected to the second fixing plate.

[0015] As a preferred solution, the drive system includes a fixed seat, a driving member and a rotating shaft. The fixed seat is arranged on the machine shell, the driving member is fixed on the fixed seat, the power output end of the driving member is connected to one end of the rotating shaft through a transmission assembly, and the other end of the rotating shaft is connected to the rotating frame.

[0016] As a preferred solution, the transmission assembly includes a gear, a rack, a slider and a slide rail. The gear is arranged on the rotating shaft, the slide rail is arranged on the fixed seat, the rack is arranged on the slider, the slider is slidably connected to the slide rail, the rack is meshed with the gear, and the power output end of the driving member is connected to the slider through a connecting shaft and a rotating arm.

[0017] As a preferred solution, the drive system further includes a connecting shaft and a rotating arm. One end of the connecting shaft is rotatably connected to one end of the rotating arm, the other end of the connecting shaft is rotatably connected to the slider, and the other end of the rotating arm is connected to the power output end of the driving member.

[0018] As a preferred solution, the connecting shaft includes a first joint rod, a connecting rod and a second joint rod. One end of the first joint rod is connected to one end of the second joint rod through the connecting rod. The other end of the first joint rod is connected to the slider through a bearing, and the other end of the second joint rod is connected to the rotating arm through a bearing. Adjusting nuts are provided between the first joint rod and the second joint rod and the connecting rod respectively.

[0019] Compared with the prior art, the beneficial effects of a shaft bending test device provided by the present invention are as follows:

[0020] The present invention clamps one end of the test plate by using the first clamping assembly, passes the test plate through between the bending test shaft and the pressure roller, clamps the other end of the test plate by using the second clamping assembly, and controls the periodic reciprocating movement of the rotating frame through the drive system, so as to realize that the bending part of the test plate bends back and forth along a preset angle on the bending test shaft. When the rotating frame rotates, it also drives the pressure roller to rotate, which plays a limiting role on the test plate and ensures that the test plate can be close to the bending test shaft when bending, thereby ensuring the accuracy of the test result. And through the adjustment of the drive system, the purposes of setting a constant bending speed, setting a bending angle, setting the number of bending times, etc. can be further achieved. The degree of automation is high, which can effectively avoid the influence of human factors on the test result and evaluation, can not only ensure the reproducibility of the test process, but also improve the production efficiency and reduce the input of repetitive labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of a shaft bending test device according to a preferred embodiment of the present invention.

[0022] Figure 2 is Figure 1 a three-dimensional structural schematic diagram from another perspective.

[0023] Figure 3 is a three-dimensional structural schematic diagram of a bending system of a shaft bending test device according to a preferred embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the working state of the bending system of the shaft-bending test device according to the preferred embodiment of the present invention.

[0025] Figure 5 It is another schematic diagram of the working state of the bending system of the shaft-bending test device according to the preferred embodiment of the present invention.

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the fixing mechanism of the shaft-bending test device according to the preferred embodiment of the present invention.

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the rotating mechanism of the shaft-bending test device according to the preferred embodiment of the present invention.

[0028] Figure 8 It is a three-dimensional structural schematic diagram of the drive system of the shaft-bending test device according to the preferred embodiment of the present invention.

[0029] Figure 9 It is a three-dimensional structural schematic diagram of the appearance of the shaft-bending test device according to the preferred embodiment of the present invention.

[0030] In the figure:

[0031] 100. Machine housing; 110. Protective cover; 120. Hinge;

[0032] 200. Bending system; 210. Base; 211. Bottom plate; 212. First mounting plate; 213. Second mounting plate; 214. Fixed block; 215. Cross beam; 220. First clamping assembly; 221. First fixing plate; 222. First clamping plate; 223. First adjusting screw; 224. First handle; 230. Bending test shaft; 240. Rotating frame; 241. First side plate; 242. Second side plate; 243. First chute; 244. Second chute; 245. Connecting block; 250. Second clamping assembly; 251. Second fixing plate; 252. Second clamping plate; 253. Bolt; 260. Pressing roller; 270. Reset assembly; 271. Elastic member; 272. Pulley; 280. Adjusting assembly; 281. Second adjusting screw; 282. Second handle; 290. Bearing seat;

[0033] 300. Driving system; 310. Fixed seat; 320. Driving part; 330. Rotating shaft; 340. Transmission component; 341. Gear; 342. Rack; 343. Slide block; 344. Slide rail; 350. Connecting shaft; 351. First joint rod; 352. Connecting rod; 353. Second joint rod; 354. Adjusting nut; 360. Rotating arm; 370. Limit sensor; 380. Limit plate; 390. Control module; 391. Controller; 392. Display screen; 393. Switch button; 394. Socket;

[0034] 400. Test plate. Detailed implementation manner

[0035] The following combines the drawings and embodiments to further describe in detail the specific implementation manner of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed", etc. used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, or a welded connection; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] As Figures 1 to 9 shown, a preferred embodiment of the present invention provides a shaft-bending test device, including a machine shell 100 and a bending system 200 and a driving system 300 provided on the machine shell 100;

[0039] The bending system 200 includes a fixing mechanism and a rotating mechanism provided on the fixing mechanism. The fixing mechanism includes a base 210, a first clamping assembly 220, and a bending test shaft 230. The base 210 is provided on the housing 100. The first clamping assembly 220 is provided at the bottom end of the base 210. The bending test shaft 230 is provided at the top end of the base 210. The rotating mechanism includes a rotating frame 240, a second clamping assembly 250, and a pressure roller 260. The rotating frame 240 is provided on the base 210 and is connected to the drive system 300. The second clamping assembly 250 and the pressure roller 260 are both provided on the rotating frame 240.

[0040] For the shaft bending test device based on the above technical features, one end of the test plate 400 is clamped by the first clamping assembly 220. The test plate 400 is passed through between the bending test shaft 230 and the pressure roller 260. The other end of the test plate 400 is clamped by the second clamping assembly 250. The drive system 300 is used to control the periodic reciprocating motion of the rotating frame 240, so as to realize that the bending part of the test plate 400 bends back and forth along a preset angle on the bending test shaft 230. When the rotating frame 240 rotates, it also drives the pressure roller 260 to rotate, which plays a limiting role on the test plate 400, ensuring that the test plate 400 can closely adhere to the bending test shaft 230 during bending, thereby ensuring the accuracy of the test results. And through the adjustment of the drive system 300, purposes such as setting a constant bending speed, setting a bending angle, and setting the number of bending times can be further achieved. The degree of automation is high, which can effectively avoid the influence of human factors on the test results and evaluation. It can not only ensure the reproducibility of the test process, but also improve production efficiency and reduce the input of repetitive labor.

[0041] In this embodiment, as Figure 3 and Figure 6 shown, the base 210 includes a bottom plate 211, a first mounting plate 212, and a second mounting plate 213. The first mounting plate 212 and the second mounting plate 213 are oppositely provided on the bottom plate 211. The first clamping assembly 220 is provided between the first mounting plate 212 and the second mounting plate 213. The bending test shaft 230 straddles between the top end of the first mounting plate 212 and the top end of the second mounting plate 213. The bottom plate 211, the first mounting plate 212, and the second mounting plate 213 are combined into a U shape. After the test plate 400 is clamped by the first clamping assembly 220, a bending test is realized through the bending test shaft 230 above.

[0042] Further, fixing blocks 214 for fixing the bending test shaft 230 are provided at the tops of the first mounting plate 212 and the second mounting plate 213. Fixing grooves are provided on the fixing blocks 214. The bending test shaft 230 is spanned on the fixing blocks 214 on both sides. The fixing grooves are semi-circular grooves for placing the two end shafts of the bending test shaft 230, facilitating the disassembly and assembly of the bending test shaft 230. The bending test shaft 230 with different diameters can be replaced directly by taking it away from and placing it in the semi-circular groove, achieving the purpose of performing bending tests with different bending radii.

[0043] In this embodiment, the first clamping assembly 220 includes a first fixing plate 221, a first clamping plate 222, and a first adjusting screw 223. The first fixing plate 221 is fixedly arranged between the first mounting plate 212 and the second mounting plate 213. A cross beam 215 is provided between the first mounting plate 212 and the second mounting plate 213. One end of the first adjusting screw 223 is connected to the first clamping plate 222, and the other end of the first adjusting screw 223 is threadedly connected to the cross beam 215. By rotating the first adjusting screw 223, the first clamping plate 222 is driven to move away from or close to the first fixing plate 221, realizing the clamping function for the test plate 400. Among them, a first handle 224 is provided on the first adjusting screw 223, facilitating the adjustment of the first adjusting screw 223.

[0044] In this embodiment, as Figure 3 and Figure 7 shown, a first side plate 241 and a second side plate 242 are provided on the rotating frame 240. The second clamping assembly 250 and the pressing roller 260 are spanned between the first side plate 241 and the second side plate 242. The installation of the second clamping assembly 250 and the pressing roller 260 is realized, and the pressing roller 260 is located outside the bending test shaft 230. When the rotating frame 240 rotates, the pressing roller 260 moves along the outer contour of the bending test shaft 230, realizing the limiting function for the test plate 400.

[0045] Further, in combination with Figures 4 to 5, both the first side plate 241 and the second side plate 242 are provided with first sliding grooves 243 for installing the second clamping assembly 250. A reset assembly 270 is further provided between the second clamping assembly 250 and the rotating frame 240. Both the first side plate 241 and the second side plate 242 are triangular in shape. The second clamping assembly 250 can slide along the first sliding groove 243 to ensure that when the test plate 400 bends downward, it can adapt to the change amount of the bent portion of the test plate 400. That is to say, when the test plate 400 bends downward to 180°, the contact area between the bent portion of the test plate 400 and the bending test shaft 230 is the largest, and the largest contact area is provided by the forward movement of the second clamping assembly 250; when the test plate 400 is in a vertical state, the test plate 400 does not contact the bending test shaft 230. Under the action of the reset assembly 270, the second clamping assembly 250 moves backward and cooperates with the first clamping assembly 220 to tighten the test plate 400, so that the rotation angle of the bent portion of the test plate 400 can be arbitrarily changed within 180°.

[0046] In this embodiment, the rotating frame 240 is provided with a second sliding groove 244 for installing the first side plate 241 and the second side plate 242. A connecting block 245 is provided between the first side plate 241 and the second side plate 242. An adjusting assembly 280 is provided between the connecting block 245 and the rotating frame 240. By adjusting the positions of the first side plate 241 and the second side plate 242 through the adjusting assembly 280, the position of the pressing roller 260 is changed, so that the pressing roller 260 can adapt to the bending test shafts 230 with different diameters.

[0047] Furthermore, the reset assembly 270 includes an elastic member 271 and a pulley 272. One end of the elastic member 271 is connected to the second clamping assembly 250, and the other end of the elastic member 271 is connected to the connecting block 245. The pulley 272 is arranged on the rotating frame 240, and the elastic member 271 is wound around the pulley 272. The connecting block 245 is arranged opposite to the pressing roller 260. When the test plate 400 bends downward to 180°, the test plate 400 resists the elastic force of the elastic member 271, causing the second clamping assembly 250 to move forward. When the test plate 400 is in a vertical state, the elastic member 271 returns to its free state, driving the second clamping assembly 250 to move backward, so that the test plate 400 is in a tensioned state during the test.

[0048] Further, the adjusting assembly 280 includes a second adjusting screw 281. One end of the second adjusting screw 281 is threadedly connected to the connecting block 245, and the other end of the second adjusting screw 281 is connected to the rotating frame 240. By rotating the second adjusting screw 281, the first side plate 241 and the second side plate 242 are driven to move back and forth, so as to adjust the position of the pressure roller 260. Wherein, the second adjusting screw 281 is provided with a second handle 282.

[0049] In this embodiment, the second clamping assembly 250 includes a second fixing plate 251, a second clamping plate 252 and a bolt 253. Both ends of the second fixing plate 251 are slidably arranged in the first chute 243. The second clamping plate 252 is provided with a hole for the bolt 253 to pass through, and the bolt 253 is threadedly connected to the second fixing plate 251. By adjusting the bolt 253, the second clamping plate 252 is pressed against the second fixing plate 251, so as to realize the clamping function of the second clamping assembly 250.

[0050] In this embodiment, the rotation axis of the rotating frame 240 and the central axis of the bending test shaft 230 are located on the same straight line. Ensure that the rotation speed of the rotating frame 240 is consistent with the bending speed of the test plate 400.

[0051] In this embodiment, one side of the rotating frame 240 is connected to the drive system 300, and the other side of the rotating frame 240 is provided with a bearing seat 290, and the bearing seat 290 is fixed on the base 210. Ensure the stability of the rotating frame 240 during rotation.

[0052] As Figure 8 shown, in this embodiment, the drive system 300 includes a fixed seat 310, a driving member 320 and a rotating shaft 330. The fixed seat 310 is arranged on the machine shell 100, the driving member 320 is fixed on the fixed seat 310, the power output end of the driving member 320 is connected to one end of the rotating shaft 330 through a transmission assembly 340, and the other end of the rotating shaft 330 is connected to the rotating frame 240. Driven by the driving member 320, the rotating frame 240 is driven to swing back and forth through the rotating shaft 330, so as to realize the automatic bending test of the test plate 400.

[0053] In this embodiment, the drive system 300 further includes a transmission assembly 340. The transmission assembly 340 includes a gear 341, a rack 342, a slider 343, and a slide rail 344. The gear 341 is provided on the rotating shaft 330, the slide rail 344 is provided on the fixed seat 310, the rack 342 is provided on the slider 343, the slider 343 is slidably connected to the slide rail 344, the rack 342 meshes with the gear 341, and the power output end of the driving member 320 is connected to the slider 343 through a connecting shaft 350 and a rotating arm 360. By the slider 343 moving back and forth on the slide rail 344, a periodic reciprocating motion of the rotating shaft 330 is realized. The meshing cooperation mode of the gear 341 and the rack 342 ensures the stability of the transmission.

[0054] In this embodiment, the drive system 300 further includes a connecting shaft 350 and a rotating arm 360. One end of the connecting shaft 350 is rotatably connected to one end of the rotating arm 360, the other end of the connecting shaft 350 is rotatably connected to the slider 343, and the other end of the rotating arm 360 is connected to the power output end of the driving member 320. Through the link mechanism composed of the rotating arm 360 and the connecting shaft 350, the slider 343 is driven to move back and forth periodically along the slide rail 344.

[0055] Further, the connecting shaft 350 includes a first joint rod 351, a connecting rod 352, and a second joint rod 353. One end of the first joint rod 351 is connected to one end of the second joint rod 353 through the connecting rod 352. The other end of the first joint rod 351 is connected to the slider 343 through a bearing, and the other end of the second joint rod 353 is connected to the rotating arm 360 through a bearing. Adjusting nuts 354 are provided between the first joint rod 351 and the second joint rod 353 and the connecting rod 352 respectively. By adjusting the adjusting nuts 354, the distance between the first joint rod 351 and the second joint rod 353 is changed to adjust the position of the slider 343, so as to control the starting position of the rotating shaft 330, so that the bending angle of the bent portion of the test plate 400 can be arbitrarily set within 180°.

[0056] In this embodiment, the drive system 300 further includes a limit sensor 370 and a limit plate 380. The limit sensor 370 is provided on the fixed seat 310, the limit plate 380 is provided on the slider 343, and the limit plate 380 passes through the sensing area of the limit sensor 370 to generate a trigger signal. Through the cooperation of the limit sensor 370 and the limit plate 380, the sliding distance of the slider 343 is detected, and the position detection function is performed on the slider 343.

[0057] In this embodiment, the driving member 320 is a driving motor. By adjusting the rotation speed and the number of rotation turns of the driving motor, the purpose of adjusting the bending speed and the number of bending times of the test plate 400 is achieved.

[0058] In this embodiment, in combination with Figures 1 to 2 As shown, the drive system 300 further includes a control module 390 electrically connected to the driving member 320 and the limit sensor 370. The control module 390 includes a controller 391 and a control circuit connected to the controller 391. The signal of the limit sensor 370 is obtained through the control circuit, and the driving motor is controlled and adjusted by the controller 391. Among them, the controller 391 is a single-chip microcomputer controller 391 or a PLC controller 391. The control principle of the control circuit is a conventional technical means and will not be elaborated here.

[0059] In this embodiment, the control module 390 further includes a display screen 392 and a switch button 393 electrically connected to the controller 391. The controller 391, the display screen 392 and the switch button 393 are all arranged on the machine shell 100. The display screen 392 is used to display control parameters, and the switch button 393 realizes the on-off control of the control module 390. In addition, the control module 390 is also provided with a socket 394 for connecting a 220V voltage power supply.

[0060] In this embodiment, as Figure 9 shown, the bending system 200 is arranged on the outer side of the machine shell 100, and the drive system 300 is arranged on the inner side of the shell. The machine shell 100 is provided with a protective cover 110 covering the bending system 200, hiding the drive system 300 inside the shell, improving the aesthetics of the overall device, and using the protective cover 110 to protect the bending system 200 to avoid interference from external factors during the bending test. Among them, the protective cover 110 is connected to the machine shell 100 through a hinge 120.

[0061] In summary, the embodiment of the present invention provides a shaft bending test device that is driven by a driving motor, which can effectively avoid the influence of human factors on the test results and evaluation, and improve the repeatability and reproducibility of the test. Especially when performing repeated bending tests on the same test plate 400, a large amount of repetitive labor will be saved. Once the parameters are set, the continuous bending test can be performed infinitely. For any bending angle with a bending angle requirement less than 180°, there is greater convenience and superiority, and the required bending angle can be directly set again to achieve it.

[0062] The embodiments of the present invention provide a bending test device around an axis, which has the following advantages: (1) It can automatically complete the bending tests with different numbers of bends, improving production efficiency and reducing the input of labor force; (2) The bending speed can be adjusted to obtain the test results at different speeds; (3) It can avoid the differences in the evaluation of test results caused by different manual bending speeds, and can achieve high repeatability and reproducibility in the bending process; (4) Different bending radii can be achieved by replacing the bending test shafts 230 with different diameters; (5) The bending angle of the bending part of the test plate 400 can be arbitrarily set within 180°; (6) The control system is used to control the test process, and the test can be stopped or resumed at any time in the middle.

[0063] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A shaft-bending test device, characterized in that, it includes a housing and a bending system and a driving system provided on the housing; The bending system includes a fixing mechanism and a rotating mechanism provided on the fixing mechanism. The fixing mechanism includes a base, a first clamping assembly and a bending test shaft. The base is provided on the housing, the first clamping assembly is provided at the bottom end of the base, and the bending test shaft is provided at the top end of the base. The rotating mechanism includes a rotating frame, a second clamping assembly and a pressing roller. The rotating frame is provided on the base and is connected to the driving system. The second clamping assembly and the pressing roller are both provided on the rotating frame; A first side plate and a second side plate are provided on the rotating frame. The second clamping assembly and the pressing roller straddle between the first side plate and the second side plate; the pressing roller is located outside the bending test shaft. When the rotating frame rotates, the pressing roller moves along the outer contour of the bending test shaft; Both the first side plate and the second side plate are provided with first chutes for installing the second clamping assembly, and a reset assembly is further provided between the second clamping assembly and the rotating frame.

2. The shaft-bending test device according to claim 1, characterized in that, the base includes a bottom plate, a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are oppositely provided on the bottom plate. The first clamping assembly is provided between the first mounting plate and the second mounting plate. The bending test shaft straddles between the top end of the first mounting plate and the top end of the second mounting plate; The first clamping assembly includes a first fixing plate, a first clamping plate and a first adjusting screw. The first fixing plate is fixedly provided between the first mounting plate and the second mounting plate. A cross beam is provided between the first mounting plate and the second mounting plate. One end of the first adjusting screw is connected to the first clamping plate, and the other end of the first adjusting screw is threadedly connected to the cross beam.

3. The shaft-bending test device according to claim 1, characterized in that, the rotating frame is provided with second chutes for installing the first side plate and the second side plate. A connecting block is provided between the first side plate and the second side plate, and an adjusting assembly is provided between the connecting block and the rotating frame.

4. The shaft-bending test device according to claim 3, characterized in that, the reset assembly includes an elastic member and a pulley. One end of the elastic member is connected to the second clamping assembly, the other end of the elastic member is connected to the connecting block, the pulley is provided on the rotating frame, and the elastic member is wound around the pulley; The adjusting assembly includes a second adjusting screw. One end of the second adjusting screw is threadedly connected to the connecting block, and the other end of the second adjusting screw is connected to the rotating frame.

5. The shaft-bending test device according to claim 3, characterized in that, The second clamping assembly includes a second fixing plate, a second clamping plate and a bolt. Both ends of the second fixing plate are slidably arranged in the first sliding groove. The second clamping plate is provided with a hole for the bolt to pass through, and the bolt is threadedly connected to the second fixing plate.

6. The shaft bending test device according to any one of claims 1 to 5, characterized in that the driving system includes a fixed seat, a driving member and a rotating shaft. The fixed seat is arranged on the machine shell. The driving member is fixed on the fixed seat. The power output end of the driving member is connected to one end of the rotating shaft through a transmission assembly, and the other end of the rotating shaft is connected to the rotating frame.

7. The shaft bending test device according to claim 6, characterized in that the transmission assembly includes a gear, a rack, a slider and a slide rail. The gear is arranged on the rotating shaft. The slide rail is arranged on the fixed seat. The rack is arranged on the slider. The slider is slidably connected to the slide rail. The rack is meshed with the gear. The power output end of the driving member is connected to the slider through a connecting shaft and a rotating arm.

8. The shaft bending test device according to claim 7, characterized in that the driving system further includes a connecting shaft and a rotating arm. One end of the connecting shaft is rotatably connected to one end of the rotating arm. The other end of the connecting shaft is rotatably connected to the slider. The other end of the rotating arm is connected to the power output end of the driving member.

9. The shaft bending test device according to claim 8, characterized in that the connecting shaft includes a first joint rod, a connecting rod and a second joint rod. One end of the first joint rod is connected to one end of the second joint rod through the connecting rod. The other end of the first joint rod is connected to the slider through a bearing. The other end of the second joint rod is connected to the rotating arm through a bearing. Adjusting nuts are arranged between the first joint rod and the second joint rod and the connecting rod respectively.

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