A fatigue testing device for a guide wheel tensioning mechanism

Abstract

The present invention discloses a fatigue testing device for a guide wheel tensioning mechanism, comprising a base, a support plate fixedly mounted on the top of the base, a testing mechanism provided on the top of the support plate, the testing mechanism comprising a rotating drum rotatably mounted on the surface of the support plate for rotating the guide wheel body at different angles, an active spring fixedly mounted on the surface of the rotating drum, the guide wheel body being mounted on the free end of the active spring, a telescopic rod being mounted between the rotating drum and the guide wheel body, and a hydraulic cylinder for testing the tensioning degree being provided near the top of the guide wheel body on the base. Through the coordinated design of the rotating drum and the arc plate, and the locking mechanism of the ratchet pawl, the present invention can realize the rotation of the guide wheel body at any angle and perform fatigue strength tests at multiple angles. This design ensures the comprehensiveness and accuracy of the test, and helps to evaluate the durability and performance of the guide wheel under different usage conditions.

Description

Technical Field

[0001] The invention relates to the field of guide wheel testing, and in particular to a fatigue testing device for a guide wheel tensioning mechanism. Background Art

[0002] Due to the rapid development of the domestic engineering machinery industry in recent years, the country has vigorously promoted the development of the engineering machinery manufacturing industry. At the same time, since the level of my country's engineering machinery manufacturing industry is still relatively backward compared with foreign countries, foreign engineering machinery giants have firmly grasped the key technologies and curbed the development of domestic manufacturing levels. With the increase in domestic demand for engineering machinery, the contradiction between supply and demand has gradually increased. Among them, excavators have the advantages of large traction, strong climbing ability, and small turning radius, so they have been widely used in engineering construction and mine development.

[0003] Guide wheel tensioning mechanisms play an important role in some mechanical equipment, such as winches, lifting devices, and conveying systems. Their working reliability and fatigue strength are directly related to the safety and service life of the equipment. However, many existing devices can only simulate fatigue conditions at a single angle and cannot accurately simulate the complex stress conditions at multiple angles in actual applications. This leads to a large difference between the test results and the actual usage conditions, making it difficult to truly reflect their fatigue performance. In addition, for key components that require precise control of tension, the testing methods of existing devices are often rough and lack sensitivity and accuracy. Summary of the Invention

[0004] The object of the present invention is to provide a fatigue testing device for a guide wheel tensioning mechanism to solve the problem raised in the above background technology that it is impossible to accurately simulate the complex stress conditions at multiple angles in actual applications.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fatigue testing device for a guide wheel tensioning mechanism, comprising a base, a support plate fixedly mounted on the top of the base, a testing mechanism provided on the top of the support plate, the testing mechanism comprising a rotating drum rotatably mounted on the surface of the support plate for rotating the guide wheel body at different angles, an active spring fixedly mounted on the surface of the rotating drum, a guide wheel body being mounted on the free end of the active spring, a telescopic rod being installed between the rotating drum and the guide wheel body, a hydraulic cylinder for testing the tensioning degree being provided near the top of the guide wheel body of the base, a multi-angle mechanism being provided at the top of the base, the multi-angle mechanism comprising an arc plate slidably mounted on the top of the base for multi-angle fatigue strength testing, the arc plate being arranged between the guide wheel body and the hydraulic cylinder, a ratchet being fixedly mounted on one end of the rotating drum, and a pawl being rotatably mounted on the side of the support plate close to the ratchet.

[0006] As a preferred technical solution of the present invention, a mounting plate is fixedly installed on the top of the base, and a plurality of sliding rods for limiting the arc plate are fixedly installed on the top of the mounting plate. The free ends of the sliding rods slide through the arc plate, and reinforcing ribs for reinforcing the sliding rods are installed between the mounting plate and the sliding rods. A slide rail is provided on the top of the base, and a roller is rotatably installed on the bottom end of the arc plate, and the roller rolls inside the slide rail.

[0007] As a preferred technical solution of the present invention, a steel plate for stabilizing the deformation of the arc-shaped plate is installed on the back side of the arc-shaped plate away from the guide wheel body. The steel plate is formed by staggered installation of multiple steel bars.

[0008] As a preferred technical solution of the present invention, a push-pull assembly is provided on the side of the guide wheel body, and the push-pull assembly includes a push-pull assembly installed on one side of the guide wheel body. The push-pull assembly includes a limit rod fixedly installed on the surface of the rotating drum, and the free end of the limit rod slides inside the arc plate.

[0009] As a preferred technical solution of the present invention, the side wall of the guide wheel body is installed with a fixed plate, and the fixed plate is slidably installed on the surface of the limit rod, and the surface of the limit rod close to the arc plate is slidably installed with a pressure plate component for testing the pressure of the guide wheel body, and the surface of the pressure plate component close to the guide wheel body is fixedly installed with a pressure block, and the surface of the limit rod close to the active spring is slidably installed with a pulling plate component for testing the tension of the guide wheel body, and the pulling plate component is installed with a pulling block close to the surface of the guide wheel body, and a connecting plate is fixedly installed between the pulling plate and the pressure plate component.

[0010] As a preferred technical solution of the present invention, the pressure plate component includes a movable plate installed at one end of the pressure block, a sliding sleeve is provided on one end of the movable plate, a long plate is slidably installed inside the sliding plate, and a plurality of rollers are rotatably installed on the surface of the long plate close to the arc plate, and a plurality of buffer springs are installed between the long plate and the movable plate to reduce the friction between the rollers and the arc plate.

[0011] As a preferred technical solution of the present invention, a cavity filled with lubricating oil is provided inside the skateboard, and a plurality of fine holes for oil drainage and lubrication are provided on the surface of the long plate close to the cavity.

[0012] As a preferred technical solution of the present invention, sliding grooves are provided on both sides of the slide plate, and a push rod is slidably installed inside the sliding groove, and the free end of the push rod is fixedly connected to the movable plate.

[0013] As a preferred technical solution of the present invention, a resistance mechanism is provided at the top of the base, and the resistance mechanism includes a moving rod installed on the output shaft of the hydraulic cylinder, racks are fixedly installed on both sides of the moving rod, and a limiting plate is provided on the surface of the rack, and a gear is rotatably installed on the top of the base, and the gear is engaged with the rack, and a take-up shaft for winding a wire rope is fixedly installed on the top of the gear, and a limiting ring is fixedly installed on the top of the base near the take-up shaft, and a lead plate is installed on one end of the limit rod near the take-up shaft, and the interior of the lead plate is fixedly connected to one end of the wire rope passing through the limiting ring.

[0014] As a preferred technical solution of the present invention, an adjustment mechanism is installed on the surface of the active spring, and the adjustment mechanism includes a sleeve plate fixedly installed on the surface of the active spring, and blocks are fixedly installed at both ends of the sleeve plate. The blocks are slidably installed on the surface of the limit rod, and an auxiliary spring for adjusting the tension of different guide wheel bodies is provided between the two blocks installed on the same surface of the limit rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Through the coordinated design of the rotating drum and the curved plate, as well as the locking mechanism of the ratchet pawl, the device of the present invention can realize the rotation of the guide wheel body at any angle and perform fatigue strength tests at multiple angles. This design ensures the comprehensiveness and accuracy of the test and helps to evaluate the durability and performance of the guide wheel under different usage conditions.

[0017] The pressure plate component of the present invention adopts a design in which multiple rotating shafts slide on the surface of the curved plate, which effectively reduces the friction with the surface of the curved plate, thereby improving the stability of the pressure plate component during the test process. This design helps to ensure that the tension force test is more accurate and avoids errors caused by excessive friction.

[0018] The present invention uses a steel wire rope in conjunction with the driving force of a hydraulic cylinder to ensure that the guide wheel body rotates at a more stable angle during the test. This design avoids the reduction in test accuracy due to inaccurate rotation angles and improves the reliability and accuracy of the test.

[0019] The steel plate of the present invention is made of multiple steel bars installed in a staggered manner, which provides strong support for the curved plate. This design helps to reduce the compressive deformation of the curved plate during the test, thereby improving the accuracy and reliability of the test. At the same time, it also extends the service life of the curved plate and reduces maintenance costs.

[0020] The present invention adds multiple auxiliary springs to the surface of the active spring. The device can adjust the elastic coefficient of the active spring to adapt to the testing requirements of guide wheel bodies of different models. This design makes the device more widely applicable, can meet the testing needs of different users, and improves the flexibility and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the guide wheel body of the present invention;

[0022] Figure 2 This is a schematic side view of the guide wheel body of the present invention;

[0023] Figure 3 This is a schematic diagram of the curved plate structure of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the resistance mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A in FIG;

[0026] Figure 6 Schematic diagram of the active spring structure of the present invention;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at B in FIG;

[0028] Figure 8 Schematic diagram of the internal structure of the skateboard of the present invention;

[0029] Figure 9 It is a schematic diagram of the cross-sectional structure of the skateboard of the present invention.

[0030] In the figure: 1. base; 2. support plate; 3. test mechanism; 31. rotating drum; 32. active spring; 33. telescopic rod; 34. guide wheel body; 35. hydraulic cylinder; 36. push-pull assembly; 361. pressure plate component; 3611. moving plate; 3612. buffer spring; 3613. cavity; 3614. long plate; 3615. roller; 3616. slide; 3617. ejector rod; 3618. slide plate; 362. pressure block; 363. fixed plate; 364. connecting plate; 365. pull block ;366. Pull plate component;367. Limit rod;37. Pawl;38. Ratchet;4. Multi-angle mechanism;41. Mounting plate;42. Reinforcement rib;43. Steel plate;44. Slide rod;45. Slide rail;46. Arc plate;47. Roller;5. Resistance mechanism;51. Lead plate;52. Wire rope;53. Moving rod;54. Take-up shaft;55. Rack;56. Gear;57. Limit plate;58. Limit ring;6. Adjustment mechanism;61. Sleeve plate;62. Auxiliary spring;63. Block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-9 The present invention provides a fatigue testing device for a guide wheel tensioning mechanism, comprising a base 1, a support plate 2 being fixedly mounted on the top of the base 1, a testing mechanism 3 being provided on the top of the support plate 2, the testing mechanism 3 comprising a rotating drum 31 rotatably mounted on the surface of the support plate 2 for rotating a guide wheel body 34 at different angles, an active spring 32 being fixedly mounted on the surface of the rotating drum 31, a guide wheel body 34 being mounted on the free end of the active spring 32, a telescopic rod 33 being installed between the rotating drum 31 and the guide wheel body 34, and a hydraulic cylinder 35 for testing the tensioning degree being provided near the top of the guide wheel body 34 of the base 1.

[0033] Among them, at the beginning of the test, the hydraulic cylinder 35 starts working, applying a certain pressure to the guide wheel body 34 to simulate its tension state during work. At the same time, the rotating drum 31 starts to rotate under the action of the external driving force, driving the guide wheel body 34 to rotate at a certain speed and angle. During this process, the active spring 32 will expand and contract accordingly according to the rotation angle and tension degree of the guide wheel body 34.

[0034] Among them, a pressure sensor is arranged between the output shaft of the hydraulic cylinder 35 and the guide wheel body 34, an angle sensor is arranged between the guide wheel body 34 and the arc plate 46, and a displacement sensor is arranged between the output shaft of the hydraulic cylinder 35 and the active spring 32. The surfaces of the active spring 32 and the auxiliary spring 62 are both provided with displacement sensors. The rotation angle, tensioning degree and expansion and contraction change data of the guide wheel body 34 and the active spring 32 can be recorded by various sensor devices. By analyzing these data, the fatigue life and performance of the guide wheel tensioning mechanism can be evaluated, and the fatigue degree of the guide wheel body 34 can be further improved.

[0035] In the technical solution of the embodiment of the present application, a multi-angle mechanism 4 is provided at the top of the base 1. The multi-angle mechanism 4 includes an arc plate 46 slidably mounted on the top of the base 1 for multi-angle fatigue strength testing. The arc plate 46 is arranged between the guide wheel body 34 and the hydraulic cylinder 35.

[0036] Among them, when the hydraulic cylinder 35 compresses the guide wheel body 34 and rotates on the surface of the arc plate 46, the guide wheel body 34 can achieve multi-angle rotation through the cooperation of the rotating cylinder 31 and the arc plate 46 to meet the needs of fatigue strength testing at different angles.

[0037] In the technical solution of the embodiment of the present application, a ratchet 38 is fixedly mounted on one end of the rotating drum 31 , and a pawl 37 is rotatably mounted on one side of the support plate 2 close to the ratchet 38 .

[0038] The angle of the guide wheel body 34 can be controlled by the cooperation of the ratchet 38 and the pawl 37 , so as to test the fatigue degree of the guide wheel body 34 at different angles.

[0039] In other embodiments, a mounting plate 41 is fixedly installed on the top of the base 1, and a plurality of slide rods 44 for limiting the arc plate 46 are fixedly installed on the top of the mounting plate 41. The free ends of the slide rods 44 slide through the arc plate 46. Reinforcing ribs 42 for reinforcing the slide rods 44 are installed between the mounting plate 41 and the slide rods 44. A slide rail 45 is provided on the top of the base 1, and a roller 47 is rotatably installed on the bottom end of the arc plate 46. The roller 47 rolls inside the slide rail 45.

[0040] Among them, the arc plate 46 can control the angle of the guide wheel body 34 and provide stable support for it; by providing a slide rod 44 and a slide rail 45, when the arc plate 46 is pushed by the hydraulic cylinder 35, it can ensure that the arc plate 46 moves stably to avoid deviation and affect the tension test effect of the guide wheel body 34.

[0041] In other embodiments, a steel plate 43 is installed on the back of the curved plate 46 away from the guide wheel body 34 to stabilize the deformation of the curved plate 46. The steel plate 43 is made of a plurality of steel bars installed in a staggered manner.

[0042] The steel plate 43 can reinforce the arc plate 46 to prevent the arc plate 46 from being deformed due to stress, thereby improving the accuracy and reliability of the test.

[0043] In other embodiments, a push-pull assembly 36 is provided on the side of the guide wheel body 34, and the push-pull assembly 36 includes a push-pull assembly 36 installed on one side of the guide wheel body 34, and the push-pull assembly 36 includes a limiting rod 367 fixedly installed on the surface of the rotating drum 31, and the free end of the limiting rod 367 slides inside the arc plate 46.

[0044] The deformation of the active spring 32 can be limited by the limiting rod 367 to prevent the active spring 32 from deviating during the test and affecting the tension test effect of the guide wheel body 34 .

[0045] In other embodiments, a fixed plate 363 is installed on the side wall of the guide wheel body 34, and the fixed plate 363 is slidably installed on the surface of the limiting rod 367. The limiting rod 367 is slidably installed on the surface near the arc plate 46 with a pressure plate component 361 for testing the pressure of the guide wheel body 34. The pressure plate component 361 is fixedly installed with a pressure block 362 on the surface near the guide wheel body 34. The limiting rod 367 is slidably installed on the surface near the active spring 32 with a pulling plate component 366 for testing the tension of the guide wheel body 34. The pulling plate component 366 is installed with a pulling block 365 on the surface near the guide wheel body 34, and a connecting plate 364 is fixedly installed between the pulling plate and the pressure plate component 361.

[0046] Among them, when testing the tension of the guide wheel body 34, it is necessary to start the hydraulic cylinder 35, the hydraulic cylinder 35 pushes the arc plate 46 to move, the arc plate 46 pushes the pressure plate component 361 to move, the pressure plate component 361 drives the pressure block 362 to move, and the pressure block 362 pushes the guide wheel body 34 to move, thereby realizing the compression test of the active spring 32. At the same time, the elastic force of the active spring 32 drives the pulling plate component 366 to move, the pulling plate component 366 drives the pulling block 365 to move, and the pulling block 365 drives the guide wheel assembly to move away, so that the fatigue degree of the guide wheel body 34 during use can be continuously tested by this reciprocating motion.

[0047] In other embodiments, the pressure plate component 361 includes a movable plate 3611 installed at one end of the pressure block 362, and a sliding sleeve is provided on one end of the movable plate 3611. A long plate 3614 is slidably installed inside the sliding plate 3618. The long plate 3614 is rotatably installed with multiple rollers 3615 on the surface of the long plate 3614 close to the arc plate 46. A plurality of buffer springs 3612 are installed between the long plate 3614 and the movable plate 3611 to reduce the friction between the roller 47 and the arc plate 46.

[0048] Among them, when the pressure plate component 361 slides on the surface of the arc plate 46, the roller 3615 can buffer the arc plate 46 through the buffer spring 3612, effectively reducing the friction with the surface of the arc plate 46, thereby improving the stability of the pressure plate component 361 during the test.

[0049] In other embodiments, a cavity 3613 filled with lubricating oil is provided inside the slide plate 3618, and a plurality of fine holes for oil drainage and lubrication are provided on the surface of the long plate 3614 close to the cavity 3613.

[0050] The lubricating oil in the cavity 3613 is pressurized by the movable plate 3611 and discharged to the surface of the roller 3615 through the fine holes, thereby lubricating the surface of the roller 3615, thereby further reducing friction and improving the stability of the angular rotation of the guide wheel body 34.

[0051] In other embodiments, a slide groove 3616 is provided on both sides of the slide plate 3618 , and a push rod 3617 is slidably installed inside the slide groove 3616 , and the free end of the push rod 3617 is fixedly connected to the movable plate 3611 .

[0052] The movable plate 3611 can be limited by the push rod 3617 to prevent the entire pressure plate component 361 from loosening and deviating, thereby affecting the angle change of the guide wheel body 34 .

[0053] In other embodiments, a resistance mechanism 5 is provided at the top of the base 1, and the resistance mechanism 5 includes a moving rod 53 installed on the output shaft of the hydraulic cylinder 35, and racks 55 are fixedly installed on both sides of the moving rod 53, and a limiting plate 57 is provided on the surface of the rack 55. A gear 56 is rotatably installed on the top of the base 1, and the gear 56 is engaged with the rack 55. A take-up shaft 54 ​​for winding the wire rope 52 is fixedly installed on the top of the gear 56, and a limiting ring 58 is fixedly installed on the top of the base 1 near the take-up shaft 54. A lead plate 51 is installed at one end of the limiting rod 367 near the take-up shaft 54, and the interior of the lead plate 51 is fixedly connected to one end of the wire rope 52 passing through the limiting ring 58.

[0054] Among them, when the hydraulic cylinder 35 pushes the arc plate 46 to move, it will also drive the moving rod 53 to move, the moving rod 53 will drive the rack 55 to move, the rack 55 will drive the gear 56 to rotate, and the gear 56 will drive the take-up shaft 54 ​​to rotate. At the same time, when the guide wheel body 34 is rotated, it will drive the lead plate 51 to move, and the lead plate 51 will pull the wire rope 52 on the surface of the take-up shaft 54 ​​out of the limiting ring 58, thereby increasing the resistance of the guide wheel body 34 and improving the stability of the movement of the guide wheel body 34.

[0055] In other embodiments, an adjustment mechanism 6 is installed on the surface of the active spring 32, and the adjustment mechanism 6 includes a sleeve plate 61 fixedly installed on the surface of the active spring 32, and blocks 63 are fixedly installed at both ends of the sleeve plate 61. The blocks 63 are slidably installed on the surface of the limit rod 367, and an auxiliary spring 62 for adjusting the tension of different guide wheel bodies 34 is provided between the two blocks 63 installed on the surface of the same limit rod 367.

[0056] Among them, by adding auxiliary springs 62 with different coefficients and different numbers between the blocks 63, the overall elastic coefficient of the active spring 32 can be adjusted to meet the testing requirements of different models of guide wheel bodies 34.

[0057] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A fatigue test device for a guide wheel tensioning mechanism, comprising a base (1), characterized in that: A support plate (2) is fixedly mounted on the top of the base (1), a testing mechanism (3) is provided on the top of the support plate (2), the testing mechanism (3) comprises a rotating drum (31) rotatably mounted on the surface of the support plate (2) for rotating the guide wheel body (34) at different angles, an active spring (32) is fixedly mounted on the surface of the rotating drum (31), the guide wheel body (34) is mounted on the free end of the active spring (32), a telescopic rod (33) is installed between the rotating drum (31) and the guide wheel body (34), and a hydraulic cylinder (35) for testing the tension degree is provided near the top of the guide wheel body (34) of the base (1); A multi-angle mechanism (4) is provided at the top of the base (1), and the multi-angle mechanism (4) includes a curved plate (46) slidably mounted on the top of the base (1) for multi-angle fatigue strength testing, and the curved plate (46) is provided between the guide wheel body (34) and the hydraulic cylinder (35); A ratchet (38) is fixedly mounted on one end of the rotating drum (31), and a pawl (37) is rotatably mounted on one side of the support plate (2) close to the ratchet (38); A push-pull assembly (36) is provided on the side of the guide wheel body (34), the push-pull assembly (36) comprising a push-pull assembly (36) mounted on one side of the guide wheel body (34), the push-pull assembly (36) comprising a limiting rod (367) fixedly mounted on the surface of the rotating drum (31), the free end of the limiting rod (367) sliding inside the arc-shaped plate (46); A fixing plate (363) is installed on the side wall of the guide wheel body (34), and the fixing plate (363) is slidably installed on the surface of the limiting rod (367). The limiting rod (367) is slidably installed on the surface of the arc plate (46) for testing the pressure of the guide wheel body (34). The pressure plate component (361) is fixedly installed with a pressure block (362) on the surface of the guide wheel body (34). The limiting rod (367) is slidably installed on the surface of the active spring (32) for testing the tension of the guide wheel body (34). The pulling block (365) is installed on the pulling plate component (366) close to the surface of the guide wheel body (34). A connecting plate (364) is fixedly installed between the pulling plate and the pressing plate component (361).

2. A fatigue testing device for a guide wheel tensioning mechanism according to claim 1, characterized in that: A mounting plate (41) is fixedly mounted on the top of the base (1), and a plurality of slide bars (44) for limiting the arc plate (46) are fixedly mounted on the top of the mounting plate (41), and the free ends of the slide bars (44) slide through the arc plate (46), and reinforcing ribs (42) for reinforcing the slide bars (44) are installed between the mounting plate (41) and the slide bars (44), and a slide rail (45) is provided on the top of the base (1), and a roller (47) is rotatably mounted on the bottom end of the arc plate (46), and the roller (47) rolls inside the slide rail (45).

3. The fatigue testing device for the guide wheel tensioning mechanism according to claim 1, characterized in that: A steel plate (43) for stabilizing the deformation of the arc-shaped plate (46) is installed on the back side of the arc-shaped plate (46) away from the guide wheel body (34). The steel plate (43) is formed by staggered installation of multiple steel bars.

4. The fatigue testing device for the guide wheel tensioning mechanism according to claim 1, characterized in that: The pressure plate component (361) includes a movable plate (3611) mounted on one end of the pressure block (362), a sliding plate (3618) being slidably mounted on one end of the movable plate (3611), a long plate (3614) being slidably mounted inside the sliding plate (3618), a plurality of rollers (3615) being rotatably mounted on the surface of the long plate (3614) close to the curved plate (46), and a plurality of buffer springs (3612) for reducing friction between the roller (47) and the curved plate (46) being mounted between the long plate (3614) and the movable plate (3611).

5. The fatigue testing device for the guide wheel tensioning mechanism according to claim 4, characterized in that: The interior of the slide plate (3618) is provided with a cavity (3613) filled with lubricating oil, and the surface of the long plate (3614) close to the cavity (3613) is provided with a plurality of fine holes for oil drainage and lubrication.

6. The fatigue testing device for the guide wheel tensioning mechanism according to claim 4, characterized in that: Slide grooves (3616) are provided on both sides of the slide plate (3618), and a push rod (3617) is slidably installed inside the slide groove (3616). The free end of the push rod (3617) is fixedly connected to the movable plate (3611).

7. The fatigue testing device for the guide wheel tensioning mechanism according to claim 1, characterized in that: The top of the base (1) is provided with a resistance mechanism (5), and the resistance mechanism (5) includes a moving rod (53) installed on the output shaft of the hydraulic cylinder (35), racks (55) are fixedly installed on both sides of the moving rod (53), and a limit plate (57) is provided on the surface of the rack (55), and a gear (56) is rotatably installed on the top of the base (1), and the gear (56) is engaged with the rack (55), and a take-up shaft (54) for winding a wire rope (52) is fixedly installed on the top of the gear (56), and a limit ring (58) is fixedly installed on the top of the base (1) near the take-up shaft (54), and a lead plate (51) is installed on one end of the limit rod (367) near the take-up shaft (54), and the interior of the lead plate (51) is fixedly connected to one end of the wire rope (52) passing through the limit ring (58).

8. The fatigue testing device for the guide wheel tensioning mechanism according to claim 1, characterized in that: An adjusting mechanism (6) is installed on the surface of the active spring (32), and the adjusting mechanism (6) includes a sleeve (61) fixedly installed on the surface of the active spring (32), and a clamping block (63) is fixedly installed at both ends of the sleeve (61), and the clamping block (63) is slidably installed on the surface of the limiting rod (367). An auxiliary spring (62) for adjusting the tension of different guide wheel bodies (34) is provided between the two clamping blocks (63) installed on the surface of the same limiting rod (367).

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