CN111122359A

CN111122359A - Bending test device around shaft

Info

Publication number: CN111122359A
Application number: CN202010056743.6A
Authority: CN
Inventors: 曾玉灵; 朱煜琳; 张贤国
Original assignee: Guangzhou Gv Industrial Co ltd
Current assignee: Guangzhou Gv Industrial Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-05-08

Abstract

The invention relates to the technical field of detection equipment, and discloses a bending test device around a shaft, which comprises a shell, a bending system and a driving system, wherein the bending system comprises a fixing mechanism and a rotating mechanism, the fixing mechanism comprises a base, a first clamping assembly and a bending test shaft, the first clamping assembly is arranged at the bottom end of the base, the bending test shaft is arranged at the top end of the base, the rotating mechanism comprises a rotating frame, a second clamping assembly and a press roller, the rotating frame is arranged on the base and connected with the driving system, and the second clamping assembly and the press roller are both arranged on the rotating frame. Utilize first clamping component to clip the one end of test panel, pass the test panel between test shaft and the compression roller of bending, utilize second clamping component to clip the other end of test panel, through the periodic reciprocating motion of actuating system control rotating turret, realize that the flexion of test panel is bent round trip to be crooked along predetermineeing the angle at the test shaft of bending, avoided the influence that artificial factor caused the test result effectively.

Description

Bending test device around shaft

Technical Field

The invention relates to the technical field of detection equipment, in particular to a device for testing bending around a shaft.

Background

The automatic cylinder bending tester is based on the standard GB/T6742-2007/ISO 1519: 2002 apparatus for an empirical test method for assessing the resistance of a paint, varnish or related product coating to cracking and/or peeling from a metal or plastic substrate when bent around a cylindrical axis under standard conditions. The cylindrical bending tester is used as the test result in a passing/failing representation mode. The cylindrical bending tester tests with a test mandrel with a specified diameter to assess whether the coating meets specific requirements; or sequentially using test mandrels of different axial diameters to determine the maximum test mandrel at which the coating cracks and/or peels from the substrate. The cylindrical bending tester requires that the bending part rotates 180 degrees at a constant speed within 1S-2S, so that the vertical test plate is bent 180 degrees.

When a cylindrical bending tester on the market is used for testing, a user rotates a bending part by hand, the time is not well controlled during testing, the constant speed cannot be achieved, even the same tester cannot achieve the same test process before and after, and the precision of a test result and the reproducibility of the test process can be influenced by artificial errors.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to realize the automatic bending test of the test plate.

In order to solve the technical problem, the invention provides a bending test device around a shaft, which comprises a shell, a bending system and a driving system, wherein the bending system and the driving system are arranged on the shell;

the bending system comprises a fixing mechanism and a rotating mechanism arranged on the fixing mechanism, the fixing mechanism comprises a base, a first clamping assembly and a bending test shaft, the base is arranged on the casing, the first clamping assembly is arranged at the bottom end of the base, the bending test shaft is arranged at the top end of the base, the rotating mechanism comprises a rotating frame, a second clamping assembly and a compression roller, the rotating frame is arranged on the base and connected with the driving system, and the second clamping assembly and the compression roller are arranged on the rotating frame.

Preferably, the base comprises 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, and the bending test shaft is arranged between the top end of the first mounting plate and the top end of the second mounting plate in a spanning manner;

first clamping component includes first fixed plate, first clamp plate and first adjusting screw, first fixed plate is fixed to be located first mounting panel with between the second mounting panel, first mounting panel with be equipped with the crossbeam between the second mounting panel, first adjusting screw's one end with first clamp plate is connected, first adjusting screw's the other end with crossbeam threaded connection.

Preferably, the rotating frame is provided with a first side plate and a second side plate, and the second clamping assembly and the pressing roller are arranged between the first side plate and the second side plate in a spanning manner.

Preferably, the first side plate and the second side plate are both provided with first chutes for mounting the second clamping assemblies, and a reset assembly is further arranged between the second clamping assemblies and the rotating frame;

the rotating frame is provided with a second sliding groove used for installing the first side plate and the second side plate, a connecting block is arranged between the first side plate and the second side plate, and an adjusting assembly is arranged between the connecting block and the rotating frame.

As a preferable scheme, the reset assembly comprises an elastic part and a pulley, one end of the elastic part is connected with the second clamping assembly, the other end of the elastic part is connected with the connecting block, the pulley is arranged on the rotating frame, and the elastic part is wound on the pulley;

the adjusting component comprises a second adjusting screw rod, one end of the second adjusting screw rod is in threaded connection with the connecting block, and the other end of the second adjusting screw rod is connected with the rotating frame.

Preferably, the second clamping assembly includes a second fixing plate, a second clamping plate and a bolt, two ends of the second fixing plate are slidably disposed in the first sliding groove, the second clamping plate is provided with a hole for the bolt to pass through, and the bolt is in threaded connection with the second fixing plate.

Preferably, the driving system comprises a fixing seat, a driving part and a rotating shaft, the fixing seat is arranged on the casing, the driving part is fixed on the fixing seat, the power output end of the driving part is connected with one end of the rotating shaft through a transmission assembly, and the other end of the rotating shaft is connected with the rotating frame.

Preferably, the transmission assembly comprises a gear, a rack, a sliding block and a sliding rail, the gear is arranged on the rotating shaft, the sliding rail is arranged on the fixed seat, the rack is arranged on the sliding block, the sliding block is connected with the sliding rail in a sliding manner, the rack is meshed with the gear, and the power output end of the driving piece is connected with the sliding block through a connecting shaft and a rotating arm.

Preferably, the driving system further comprises a connecting shaft and a rotating arm, one end of the connecting shaft is rotatably connected with one end of the rotating arm, the other end of the connecting shaft is rotatably connected with the sliding block, and the other end of the rotating arm is connected with the power output end of the driving piece.

Preferably, 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 with one end of the second joint rod through the connecting rod, the other end of the first joint rod is connected with the slider through a bearing, the other end of the second joint rod is connected with the rotating arm through a bearing, and adjusting nuts are respectively arranged between the first joint rod and the connecting rod and between the second joint rod and the connecting rod.

Compared with the prior art, the axial bending test device provided by the invention has the beneficial effects that:

the invention uses the first clamping component to clamp one end of a test board, the test board passes through the bending test shaft and the press roller, uses the second clamping component to clamp the other end of the test board, controls the rotating frame to do periodic reciprocating motion through the driving system, realizes that the bending part of the test board bends back and forth along a preset angle on the bending test shaft, drives the press roller to rotate when the rotating frame rotates, plays a limiting role on the test board, ensures that the test board can be tightly attached to the bending test shaft when bending, thereby ensuring the accuracy of the test result, can further achieve the purposes of setting a constant bending speed, setting a bending angle, setting bending times and the like through the adjustment of the driving system, has high degree of automation, can effectively avoid the influence of human factors on the test result and evaluation, and can ensure the reproducibility of the test process, and the production efficiency can be improved, and the input of repetitive labor force is reduced.

Drawings

FIG. 1 is a perspective view of a bending test apparatus around a shaft according to a preferred embodiment of the present invention.

Fig. 2 is a schematic perspective view of fig. 1 from another angle.

Fig. 3 is a schematic perspective view of a bending system of a bending apparatus for bending around a shaft according to a preferred embodiment of the present invention.

FIG. 4 is a schematic view showing the operation of a bending system of the apparatus for testing bending around a shaft according to the preferred embodiment of the present invention.

FIG. 5 is a schematic view showing another operation state of the bending system of the bending apparatus around the shaft according to the preferred embodiment of the present invention.

FIG. 6 is a perspective view of a fixing mechanism of a bending test apparatus around a shaft according to a preferred embodiment of the present invention.

FIG. 7 is a perspective view of a rotation mechanism of a bending test apparatus according to a preferred embodiment of the present invention.

FIG. 8 is a perspective view of a driving system of the bending test apparatus around a shaft according to the preferred embodiment of the present invention.

FIG. 9 is a perspective view showing the appearance of a bending test apparatus around a shaft according to a preferred embodiment of the present invention.

In the figure:

100. a housing; 110. a protective cover; 120. a hinge;

200. a bending system; 210. a base; 211. a base plate; 212. a first mounting plate; 213. a second mounting plate; 214. a fixed block; 215. a cross beam; 220. a first clamping assembly; 221. a first fixing plate; 222. a first clamping plate; 223. a first adjusting screw; 224. a first handle; 230. bending the test shaft; 240. a rotating frame; 241. a first side plate; 242. a second side plate; 243. a first chute; 244. a second chute; 245. connecting blocks; 250. a second clamping assembly; 251. a second fixing plate; 252. a second clamping plate; 253. a bolt; 260. a compression roller; 270. a reset assembly; 271. an elastic member; 272. a pulley; 280. an adjustment assembly; 281. a second adjusting screw; 282. a second handle; 290. a bearing seat;

300. a drive system; 310. a fixed seat; 320. a drive member; 330. a rotating shaft; 340. a transmission assembly; 341. a gear; 342. a rack; 343. a slider; 344. a slide rail; 350. a connecting shaft; 351. a first joint bar; 352. a connecting rod; 353. a second joint bar; 354. adjusting the nut; 360. a rotating arm; 370. a limit sensor; 380. a limiting plate; 390. a control module; 391. a controller; 392. a display screen; 393. a switch button; 394. a socket;

400. and (6) testing the board.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in a broad sense, and for example, the terms "connected," "connected," and "fixed" may be fixed, detachable, or integrated; the connection can be mechanical connection or welding connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 9, a preferred embodiment of the present invention provides a device for testing bending around a shaft, which includes a housing 100, and a bending system 200 and a driving system 300 disposed on the housing 100;

bending system 200 includes fixed establishment and locates slewing mechanism on the fixed establishment, fixed establishment includes base 210, first clamping component 220 and bending test axle 230, base 210 locates on casing 100, first clamping component 220 locates the bottom of base 210, bending test axle 230 locates the top of base 210, slewing mechanism includes rotating turret 240, second clamping component 250 and compression roller 260, rotating turret 240 locates on the base 210 and with actuating system 300 is connected, second clamping component 250 with compression roller 260 all locates on rotating turret 240.

Based on the above technical characteristics, in the bending test device around a shaft, one end of the test board 400 is clamped by the first clamping assembly 220, the test board 400 passes through the bending test shaft 230 and the compression roller 260, the other end of the test board 400 is clamped by the second clamping assembly 250, the driving system 300 controls the rotating frame 240 to do periodic reciprocating motion, so that the bending portion of the test board 400 is bent back and forth on the bending test shaft 230 along a preset angle, the rotating frame 240 also drives the compression roller 260 to rotate when rotating, a limiting effect is achieved on the test board 400, the test board 400 can be tightly attached to the bending test shaft 230 when being bent, the precision of a test result is ensured, and the purposes of setting a constant bending speed, setting a bending angle, setting bending times and the like can be further achieved through the adjustment of the driving system 300, and the degree of automation is high, the influence of human factors on the test result and evaluation can be effectively avoided, the repeatability of the test process can be ensured, the production efficiency can be improved, and the input of repetitive labor force is reduced.

In this embodiment, as shown in fig. 3 and 6, 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 disposed on the bottom plate 211, the first clamping assembly 220 is disposed between the first mounting plate 212 and the second mounting plate 213, the bending test shaft 230 is disposed between a top end of the first mounting plate 212 and a 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 in a U-shape, and after the test board 400 is clamped by the first clamping assembly 220, a bending test is performed by the bending test shaft 230 above the test board.

Further, the top end of the first mounting plate 212 and the top end of the second mounting plate 213 are both provided with a fixing block 214 for fixing the bending test shaft 230, and the fixing block 214 is provided with a fixing groove. The bending test shaft 230 is arranged on the fixing block 214 on two sides in a spanning manner, the fixing groove is a semicircular groove and is used for placing shaft cores at two ends of the bending test shaft 230, the bending test shaft 230 is convenient to disassemble and assemble, the bending test shaft 230 with different diameters can be replaced by directly taking away and placing the bending test shaft from the semicircular groove, and the purpose of performing bending test by using different bending radiuses is achieved.

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 fixed to be located the first mounting plate 212 with between the second mounting plate 213, the first mounting plate 212 with be equipped with the crossbeam 215 between the second mounting plate 213, the one end of the first adjusting screw 223 with the first clamping plate 222 is connected, the other end of the first adjusting screw 223 with crossbeam 215 threaded connection, through rotating the first adjusting screw 223, drive the first clamping plate 222 is kept away from or is close to the first fixing plate 221, realize the clamping function to the test board 400. Wherein, the first adjusting screw 223 is provided with a first handle 224, which facilitates the adjustment of the first adjusting screw 223.

In this embodiment, as shown in fig. 3 and 7, the rotating frame 240 is provided with a first side plate 241 and a second side plate 242, and the second clamping assembly 250 and the pressing roller 260 are disposed between the first side plate 241 and the second side plate 242. The second clamping assembly 250 and the pressing roller 260 are mounted, the pressing roller 260 is located on the outer side of the bending test shaft 230, and when the rotating frame 240 rotates, the pressing roller 260 moves along the outer contour of the bending test shaft 230, so that the limiting function of the test board 400 is realized.

Further, with reference to fig. 4 to 5, the first side plate 241 and the second side plate 242 are both provided with a first sliding groove 243 for mounting the second clamping assembly 250, a reset assembly 270 is further provided between the second clamping assembly 250 and the rotating frame 240, the first side plate 241 and the second side plate 242 are both triangular, and the second clamping assembly 250 can slide along the first sliding groove 243 to ensure that the bending amount of the test board 400 is adapted when the test board 400 is bent downward, that is, when the test board 400 is bent downward to 180 °, the abutting area of the bending portion of the test board 400 and the bending test shaft 230 is the largest, and the largest abutting area is provided by the forward movement of the second clamping assembly 250; when the test board 400 is in a vertical state, the test board 400 is not abutted against the bending test shaft 230, and under the action of the resetting component 270, the second clamping component 250 moves backwards and is matched with the first clamping component 220 to tension the test board 400, so that the rotation angle of the bending part of the test board 400 can be changed within 180 degrees.

In this embodiment, the rotating frame 240 is provided with a second sliding slot 244 for mounting the first side plate 241 and the second side plate 242, a connecting block 245 is arranged between the first side plate 241 and the second side plate 242, and an adjusting assembly 280 is arranged between the connecting block 245 and the rotating frame 240. By adjusting the position of first side plate 241 and second side plate 242 via adjustment assembly 280, the position of compression roller 260 may be changed such that compression roller 260 accommodates bend test shafts 230 of different diameters.

Further, 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, the other end of the elastic member 271 is connected to the connecting block 245, the pulley 272 is disposed 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 board 400 is bent downward to 180 °, the test board 400 resists the elastic force of the elastic member 271, so that the second clamping assembly 250 moves forward, and when the test board 400 is in a vertical state, the elastic member 271 returns to a free state, so as to drive the second clamping assembly 250 to move backward, so that the test board 400 is in a tensioned state in the test process.

Further, the adjusting assembly 280 includes a second adjusting screw 281, one end of the second adjusting screw 281 is connected to the connecting block 245 in a threaded manner, 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 that the position of the pressing roller 260 is adjusted. Wherein the second adjusting screw 281 is provided with a second handle 282.

In this embodiment, the second clamping assembly 250 includes a second fixing plate 251, a second clamping plate 252 and a bolt 253, two ends of the second fixing plate 251 are slidably disposed in the first sliding groove 243, the second clamping plate 252 is provided with a hole for the bolt 253 to pass through, and the bolt 253 is in threaded connection with the second fixing plate 251. By adjusting the bolt 253, the second clamping plate 252 is pressed against the second fixing plate 251, so that the clamping function of the second clamping assembly 250 is realized.

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. The rotating speed of the rotating frame 240 is ensured to be consistent with the bending speed of the test board 400.

In this embodiment, one side of the rotating frame 240 is connected to the driving 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. The stability of the turret 240 during rotation is ensured.

As shown in fig. 8, in the present embodiment, the driving system 300 includes a fixing base 310, a driving member 320, and a rotating shaft 330, the fixing base 310 is disposed on the casing 100, the driving member 320 is fixed on the fixing base 310, a 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. The rotating frame 240 is driven by the driving member 320 to swing back and forth by the rotating shaft 330, so that the automatic bending test of the test board 400 is realized.

In this embodiment, the driving 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 disposed on the rotating shaft 330, the slide rail 344 is disposed on the fixing base 310, the rack 342 is disposed on the slider 343, the slider 343 is slidably connected to the slide rail 344, the rack 342 is engaged with the gear 341, and a power output end of the driving element 320 is connected to the slider 343 through a connecting shaft 350 and a rotating arm 360. The sliding block 343 moves back and forth on the sliding rail 344 to realize the periodic reciprocating motion of the rotating shaft 330, and the meshing engagement of the gear 341 and the rack 342 ensures the stability of transmission.

In this embodiment, the driving 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. The slider 343 is driven to move back and forth periodically along the slide rail 344 by a link mechanism formed by the rotating arm 360 and the connecting shaft 350.

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 with one end of the second joint rod 353 through the connecting rod 352, the other end of the first joint rod 351 is connected with the slider 343 through a bearing, the other end of the second joint rod 353 is connected with the rotating arm 360 through a bearing, an adjusting nut 354 is respectively arranged between the first joint rod 351 and the second joint rod 353 and the connecting rod 352, and the distance between the first joint rod 351 and the second joint rod 353 is changed by adjusting the adjusting nut 354 to adjust the position of the slider 343, so that the initial position of the rotating shaft 330 is controlled, and the bending angle of the bending portion of the test board 400 can be arbitrarily set within 180 °.

In this embodiment, the driving system 300 further includes a limit sensor 370 and a limit plate 380, the limit sensor 370 is disposed on the fixing base 310, the limit plate 380 is disposed on the sliding block 343, and the limit plate 380 passes through a 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 a position detection function is performed on the slider 343.

In this embodiment, the driving member 320 is a driving motor, and the purpose of adjusting the bending speed and the bending times of the test board 400 is achieved by adjusting the rotation speed and the number of rotation turns of the driving motor.

In this embodiment, as shown in fig. 1 to fig. 2, the driving system 300 further includes a control module 390 electrically connected to the driving member 320 and the limit sensor 370, and the control module 390 includes a controller 391 and a control circuit connected to the controller 391. The control circuit obtains the signal of the limit sensor 370, and the controller 391 is used to control and regulate the driving motor, wherein the controller 391 is a single chip controller 391 or a PLC controller 391, and the control principle of the control circuit is a conventional technical means, which is not described herein again.

In this embodiment, the control module 390 further includes a display 392 electrically connected to the controller 391 and a switch button 393, and the controller 391, the display 392 and the switch button 393 are all disposed on the housing 100. The display screen 392 is used for displaying control parameters, and the switch button 393 is used for controlling the opening and closing of the control module 390. In addition, the control module 390 is provided with a socket 394 for connecting a 220V voltage power source.

In this embodiment, as shown in fig. 9, the bending system 200 is disposed on the outer side of the casing 100, the driving system 300 is disposed on the inner side of the casing, the casing 100 is disposed with a protective cover 110 covering the bending system 200, the driving system 300 is hidden on the inner side of the casing, so as to improve the aesthetic property of the whole device, and the protective cover 110 is utilized to protect the bending system 200 and prevent external factors from interfering with the bending test, wherein the protective cover 110 is connected to the casing 100 through a hinge 120.

In summary, the embodiment of the invention provides a bending test device around a shaft, which is driven by a driving motor, and can effectively avoid the influence of human factors on test results and evaluation, and improve the repeatability and reproducibility of the test. Especially, when the repeated bending test is performed on the same test board 400, a large amount of repetitive labor force can be saved, parameters are set once, and the continuous bending test can be performed for an unlimited number of times. The bending angle is required to be any angle less than 180 degrees, so that the convenience and the superiority are higher, and the required bending angle can be directly reset.

The embodiment of the invention provides a device for testing bending around a shaft, which has the following advantages: (1) bending tests with different bending times can be automatically completed, the production efficiency is improved, and the labor input is reduced; (2) the bending speed can be adjusted, so that test results at different speeds can be obtained; (3) the difference of evaluation test results caused by the difference of artificial bending speeds is avoided, and high repeatability and reproducibility of the bending process can be realized; (4) different bending radii are achieved by replacing bending test shafts 230 of different diameters; (5) the bending angle of the bending portion of the test board 400 can be arbitrarily set within 180 °; (6) the control system is used for controlling the test process, and the test can be stopped or recovered at any time in the midway.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A bending test device around a shaft is characterized by comprising a machine shell, a bending system and a driving system, wherein the bending system and the driving system are arranged on the machine shell;

2. The apparatus according to claim 1, wherein 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 disposed on the bottom plate in an opposing manner, the first clamping assembly is disposed between the first mounting plate and the second mounting plate, and the bending test shaft spans between a top end of the first mounting plate and a top end of the second mounting plate;

3. The apparatus according to claim 1, wherein the turret is provided with a first side plate and a second side plate, and the second clamping assembly and the pressing roller are disposed between the first side plate and the second side plate.

4. The apparatus according to claim 3, wherein the first side plate and the second side plate are both provided with a first sliding groove for mounting the second clamping assembly, and a reset assembly is further provided between the second clamping assembly and the rotating frame;

5. The apparatus according to claim 4, wherein the return assembly comprises 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 disposed on the rotating frame, and the elastic member is wound around the pulley;

6. The apparatus according to claim 4, wherein the second clamping assembly comprises a second fixing plate, a second clamping plate, and a bolt, two ends of the second fixing plate are slidably disposed in the first sliding slot, the second clamping plate is provided with a hole for passing the bolt, and the bolt is in threaded connection with the second fixing plate.

7. The apparatus according to any one of claims 1 to 6, wherein the driving system comprises a fixing seat, a driving member, and a rotating shaft, the fixing seat is disposed on the housing, the driving member is fixed on the fixing seat, a 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.

8. The apparatus according to claim 7, wherein the transmission assembly comprises a gear, a rack, a slider, and a slide rail, the gear is disposed on the rotating shaft, the slide rail is disposed on the fixing base, the rack is disposed on the slider, the slider is slidably connected to the slide rail, the rack is engaged with the gear, and a power output end of the driving member is connected to the slider through a connecting shaft and a rotating arm.

9. The apparatus according to claim 8, wherein the driving system further comprises 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 sliding block, and the other end of the rotating arm is connected to the power output end of the driving member.

10. The apparatus according to claim 9, wherein 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 via the connecting rod, the other end of the first joint rod is connected to the slider via a bearing, the other end of the second joint rod is connected to the rotating arm via a bearing, and an adjusting nut is disposed between each of the first joint rod and the second joint rod and the connecting rod.