Fatigue test device of guide wheel tensioning mechanism

Abstract

A fatigue test device for a guide wheel tensioning mechanism disclosed by the present invention comprises a base, the top end of the base is fixedly provided with a supporting plate, the top end of the supporting plate is provided with a test mechanism, the test mechanism comprises a rotating cylinder which is rotatably installed on the surface of the supporting plate and is used for rotating a guide wheel body by different angles, and the surface of the rotating cylinder is fixedly provided with a driving spring. A driving spring is installed on the base, a guide wheel body is installed at the free end of the driving spring, a telescopic rod is installed between the rotary drum and the guide wheel body, and a hydraulic oil cylinder used for testing the tensioning degree is arranged at the top end, close to the guide wheel body, of the base. According to the device, rotation of the guide wheel body at any angle can be achieved, multi-angle fatigue strength testing can be carried out, the comprehensiveness and accuracy of testing are ensured through the design, and evaluation of durability and performance of the guide wheel under different use conditions is facilitated.

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 construction machinery industry in recent years, the country has vigorously promoted the development of the construction machinery manufacturing industry. At the same time, since the level of my country's construction machinery manufacturing industry is still relatively backward compared with foreign countries, foreign construction machinery giants have firmly grasped the key technologies and curbed the development of domestic manufacturing levels. With the increase in domestic demand for construction 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. Therefore, they have been widely used in engineering construction and mining development.

[0003] The guide wheel tensioning mechanism plays an important role in some mechanical equipment, such as winches, lifting devices and conveying systems. Its 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 its fatigue performance. In addition, for key components that require precise control of the tensioning force, 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 in the above-mentioned 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 purpose, 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 arranged 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 mounted on the free end of the active spring, a telescopic rod installed between the rotating drum and the guide wheel body, a hydraulic cylinder for testing the tensioning degree is arranged on the top of the base near the top of the guide wheel body, a multi-angle mechanism is arranged on the top of the base, the multi-angle mechanism comprises an arc plate slidably mounted on the top of the base for multi-angle fatigue strength testing, the arc plate is arranged between the guide wheel body and the hydraulic cylinder, a ratchet is fixedly mounted on one end of the rotating drum, and a pawl is rotatably mounted on the side of the support plate near 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, and 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, and 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, a fixed plate is installed on the side wall of the guide wheel body, and the fixed plate is slidably installed on the surface of the limit rod, and a pressure plate component for testing the pressure of the guide wheel body is slidably installed on the surface of the limit rod close to the arc plate, and a pressure block is fixedly installed on the surface of the pressure plate component close to the guide wheel body, and a pulling plate component for testing the tension of the guide wheel body is slidably installed on the surface of the limit rod close to the active spring, and a pulling block is installed on the surface of the pulling plate component close to 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 plate is slidably sleeved on one end of the movable plate, a long plate is slidably installed inside the sliding plate, 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 for filling 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 board close to the cavity.

[0012] As a preferred technical solution of the present invention, slide grooves are provided on both sides of the slide plate, a push rod is slidably installed inside the slide groove, and a 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 arranged 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 arranged on the surface of the rack, a gear is rotatably installed on the top of the base, the gear is meshed with the rack, a take-up shaft for winding a wire rope is fixedly installed on the top of the gear, a limiting ring is fixedly installed on the top of the base near the take-up shaft, a lead plate is installed on one end of the limit rod near the take-up shaft, and the interior of the lead shaft 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 force of different guide wheel bodies is arranged between the two blocks installed on the surface of the same limit rod.

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

[0016] 1. Through the coordinated design of the rotating drum and the arc plate, and the locking mechanism of the ratchet pawl, the device 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 use conditions.

[0017] 2. The present invention effectively reduces the friction with the surface of the arc plate by setting up a pressure plate component and adopting a design in which multiple rotating shafts slide on the surface of the arc plate, thereby improving the stability of the pressure plate component during the test. This design helps to ensure that the tension force test is more accurate and avoids errors caused by excessive friction.

[0018] 3. The present invention can ensure a more stable rotation angle of the guide wheel body during the test by using a steel wire rope in conjunction with the driving force of the hydraulic cylinder. This design avoids reduced test accuracy due to inaccurate rotation angles and improves the reliability and accuracy of the test.

[0019] 4. The present invention provides a strong supporting force for the curved plate by setting a steel plate formed by staggered installation of multiple steel bars. 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] 5. The present invention adds a plurality of auxiliary springs on 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 requirements of different users, and improves the flexibility and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the side structure of the guide wheel body of the present invention;

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

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

[0029] Fig. 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 board; 3615, roller; 3616, slideway; 3617, push 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, reinforcing ribs; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-9 The present invention provides a fatigue test device for a guide wheel tensioning mechanism, comprising a base 1, a support plate 2 is fixedly mounted on the top of the base 1, a test mechanism 3 is arranged on the top of the support plate 2, the test mechanism 3 comprises 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 is fixedly mounted on the surface of the rotating drum 31, a 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 tensioning degree is arranged 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 to work, 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, a displacement sensor is arranged between the output shaft of the hydraulic cylinder 35 and the active spring 32, and displacement sensors are arranged on the surfaces of the active spring 32 and the auxiliary spring 62. 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, and the fatigue life and performance of the guide wheel tensioning mechanism can be evaluated by analyzing these data, thereby further improving the fatigue degree of the guide wheel body 34.

[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, and the multi-angle mechanism 4 includes an arc plate 46 slidably installed on the top of the base 1 for multi-angle fatigue strength testing, and the arc plate 46 is arranged between the guide wheel body 34 and the hydraulic cylinder 35.

[0036] 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 drum 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 ratchet pawl 37 is rotatably mounted on one side of the support plate 2 close to the ratchet 38 .

[0038] Among them, through the cooperation of the ratchet 38 and the pawl 37, the angle of the guide wheel body 34 can be controlled, 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, when the guide wheel body 34 slides on the surface of the arc plate 46, the arc shape design of the arc plate 46 can make the guide wheel body 34 adjust the angle along the arc shape of the arc plate 46 and stably support the guide wheel body; by providing the sliding rod 44 and the sliding 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 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 a plurality of steel bars.

[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 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 close to 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 close to the guide wheel body 34. The limiting rod 367 is slidably installed on the surface close to 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 close to 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 drives the guide wheel body 34 to move, thereby realizing the compression test tension of the active spring 32. At the same time, the elastic force of the active spring 32 drives the pull plate component 366 to move, the pull plate component 366 drives the pull block 365 to move, and the pull 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 tested continuously by reciprocating.

[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 3618 is provided on one end of the movable plate 3611, and 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, and multiple 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] 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 for filling lubricating oil is provided inside the skateboard 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, and the surface of the roller 3615 is lubricated, thereby further reducing the friction and improving the stability of the angular rotation of the guide wheel body 34.

[0051] In some other embodiments, 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 , 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 pressure plate component 361 from being loosened or offset as a whole, 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, 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, the gear 56 is meshed 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, a limiting 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 shaft 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, the gear 56 will drive the take-up shaft 54 ​​to rotate, and 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 arranged 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 replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope 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 arranged 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) and used to rotate 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 arranged 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) comprises an arc plate (46) slidably mounted on the top of the base (1) and used for multi-angle fatigue strength testing, and the arc plate (46) is arranged between the guide wheel body (34) and the hydraulic cylinder (35); A ratchet wheel (38) is fixedly mounted on one end of the rotating drum (31), and a ratchet pawl (37) is rotatably mounted on one side of the supporting plate (2) close to the ratchet wheel (38).

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), a plurality of slide bars (44) for limiting the position of the arc plate (46) are fixedly mounted on the top of the mounting plate (41), the free ends of the slide bars (44) slide through the arc plate (46), reinforcing ribs (42) for reinforcing the slide bars (44) are mounted between the mounting plate (41) and the slide bars (44), a slide rail (45) is arranged on the top of the base (1), a roller (47) is rotatably mounted on the bottom of the arc plate (46), and the roller (47) rolls inside the slide rail (45).

3. A fatigue testing device for a 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 a plurality of steel bars.

4. A fatigue testing device for a guide wheel tensioning mechanism according to claim 1, characterized in that: 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 limit rod (367) fixedly installed on the surface of the rotating drum (31), and the free end of the limit rod (367) slides inside the arc plate (46).

5. A fatigue testing device for a guide wheel tensioning mechanism according to claim 4, characterized in that: 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 a limiting rod (367). A pressure plate component (361) for testing the pressure of the guide wheel body (34) is slidably installed on the surface of the limiting rod (367) close to the arc plate (46). A pressure block (362) is fixedly installed on the surface of the pressure plate component (361) close to the guide wheel body (34). A pulling plate component (366) for testing the tension of the guide wheel body (34) is slidably installed on the surface of the limiting rod (367) close to the active spring (32). A pulling block (365) is installed on the pulling plate component (366) close to the surface of the guide wheel body (34), and a connecting plate (364) is fixedly installed between the pulling plate and the pressure plate component (361).

6. A fatigue testing device for a guide wheel tensioning mechanism according to claim 5, characterized in that: The pressure plate component (361) includes a movable plate (3611) installed at one end of the pressure block (362), one end of the movable plate (3611) is slidably sleeved with a slide plate (3618), a long plate (3614) is slidably installed inside the slide plate (3618), and a plurality of rollers (3615) are rotatably installed on the surface of the long plate (3614) close to the arc plate (46), and a plurality of buffer springs (3612) for reducing the friction between the roller (47) and the arc plate (46) are installed between the long plate (3614) and the movable plate (3611).

7. A fatigue testing device for a guide wheel tensioning mechanism according to claim 6, characterized in that: The interior of the slide plate (3618) is provided with a cavity (3613) for filling 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.

8. The fatigue testing device for the guide wheel tensioning mechanism according to claim 6, 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), and the free end of the push rod (3617) is fixedly connected to the movable plate (3611).

9. A fatigue testing device for a guide wheel tensioning mechanism according to claim 4, characterized in that: A resistance mechanism (5) is arranged at the top of the base (1), and the resistance mechanism (5) comprises a moving rod (53) mounted on the output shaft of the hydraulic cylinder (35), racks (55) are fixedly mounted on both sides of the moving rod (53), and a limit plate (57) is arranged on the surface of the rack (55), a gear (56) is rotatably mounted on the top of the base (1), the gear (56) meshes with the rack (55), a take-up shaft (54) for winding a steel wire rope (52) is fixedly mounted on the top of the gear (56), a limit ring (58) is fixedly mounted on the top of the base (1) near the take-up shaft (54), a lead plate (51) is mounted on one end of the limit rod (367) near the take-up shaft (54), and the interior of the lead shaft is fixedly connected to one end of the steel wire rope (52) passing through the limit ring (58).

10. The fatigue testing device of 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) comprises 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), and 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 arranged between the two blocks (63) installed on the surface of the same limit rod (367).

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