Climbing ladder single hinge load testing device

Abstract

The utility model discloses a climbing ladder single hinge load testing device, which comprises an X-axis moving platform, a Y-axis moving platform, a Z-axis lifting platform and a support frame, and is characterized in that the Y-axis moving platform is adjustably arranged on the ground along the Y-axis direction; the front side of the supporting frame serves as a supporting part of the upper end of a to-be-tested climbing ladder. The Y-axis moving platform is located on the front side of the supporting frame in the Y-axis direction from an overlook angle, and the rear side of the Y-axis moving platform is provided with an abutting part of the lower end of the to-be-tested climbing ladder. The X-axis moving platforms are arranged on the rear side of the Y-axis moving platform at intervals in the Y-axis direction and are driven to translate in the X-axis direction; and the Z-axis lifting platform is positioned on the X-axis moving platform and is arranged corresponding to steps of the climbing ladder to be tested. According to the scheme, through the X-axis moving platform and the Y-axis moving platform, the test orientation of the to-be-tested climbing ladder corresponding to the Z-axis lifting platform can be adjusted, so that the single-hinge load test of climbing ladders with various lengths is met, and the test efficiency and convenience are improved.

Description

Technical Field

[0001] The utility model relates to an instrument for testing a climbing ladder product, in particular to a single-hinge load testing device for the climbing ladder, and belongs to the technical field of safety performance testing instruments. Background Art

[0002] A climbing ladder is a type of equipment that uses height as a working principle to help users climb to a specific height, thereby obtaining goods or climbing to a certain height. At present, in the climbing ladder industry, after the climbing ladder product samples are manufactured, they need to undergo safety performance tests, and only after the safety performance tests are qualified can they be mass-produced.

[0003] Due to the wide variety of climbing ladders, there is no universal testing instrument to test the single hinges (see Appendix) used for connection and positioning on both sides of various climbing ladders. Figure 2 Therefore, it is necessary to design a special test instrument to complete the relevant test work, which becomes the subject to be studied and solved by the utility model. Summary of the invention

[0004] The utility model aims to provide a single-hinge load testing device for a climbing ladder.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a single-hinge load testing device for a climbing ladder, including an X-axis moving platform, a Y-axis moving platform, a Z-axis lifting platform and a supporting frame.

[0006] The Y-axis moving platform is arranged on the ground in an adjustable manner along the Y-axis direction.

[0007] The front side of the support frame serves as a support portion for the upper end of the climbing ladder to be tested.

[0008] From a top view, the Y-axis mobile platform is located at the front side of the support frame in the Y-axis direction, and the rear side of the Y-axis mobile platform has an abutment portion for the lower end of the climbing ladder to be tested. The X-axis mobile platform is arranged at a distance from the rear side of the Y-axis mobile platform in the Y-axis direction, and is driven to translate along the X-axis direction.

[0009] The Z-axis lifting platform is positioned on the X-axis moving platform and is arranged corresponding to the steps of the climbing ladder to be tested.

[0010] In the above scheme, after the climbing ladder to be tested is unfolded, one end of the climbing ladder to be tested is close to the buffer layer of the supporting frame, and the other end of the climbing ladder to be tested is placed on the Y-axis moving platform. According to the length of the ladder, the T-shaped screw can be driven by a motor to move the Y-axis moving platform back and forth, so that ladders of different models can form the required test angle with the Y-axis moving platform. After the Z-axis lifting platform is adjusted by the X-axis moving platform, the test force applied in the single hinge load test can be controlled by the Z-axis lifting platform.

[0011] A further technical solution is that the X-axis movable platform comprises a horizontal fixed plate, a first T-shaped lead screw, a horizontal connecting plate and a first guide rail, the left and right end surfaces of the horizontal fixed plate are fixedly connected with the first guide rail, and the horizontal fixed plate is fixedly arranged on the platform support frame, and frame pads are evenly distributed at the bottom end of the platform support frame, and the four corners of the upper surface of the horizontal fixed plate are respectively provided with first buffer blocks fixed by buffer block mounting plates, the first T-shaped lead screw is located on the horizontal fixed plate, and one end of the first T-shaped lead screw is drivingly connected to the three-phase asynchronous motor and the first reducer, and the other end of the first T-shaped lead screw is drivingly connected to the horizontal connecting plate through a nut mounting block, and the water The left and right ends of the flat connecting plate are connected to the Z-axis lifting platform mounting plates through clamping blocks, and the bottom ends of the two groups of Z-axis lifting platform mounting plates are respectively slidably connected to the corresponding first guide rails, one side of one group of first guide rails is connected to the drag chain, and the drag chain is fixed to one side of the platform support frame through the drag chain mounting plate; a sensing block is provided on the Z-axis lifting platform mounting plate on the same side as the drag chain, and the sensing block is located between the first origin sensor and the first end point sensor, the first origin sensor is fixed to the side of one end of the horizontal fixed plate through the first sensing mounting plate, and the first end point sensor is fixed to the side of the other end of the horizontal fixed plate through the second sensing mounting plate.

[0012] A further technical solution is that the Y-axis movable platform comprises a movable iron plate, a second guide rail and a second T-shaped lead screw, the upper surface of the movable iron plate is fixedly connected with a wooden board through a limit block, the left and right ends of the lower surface of the movable iron plate are slidably connected with the second guide rail, and a pad is set between the movable iron plate and the second guide rail, the front and rear ends of the second guide rail are provided with a second buffer block fixed by a buffer block mounting frame, the second guide rail is supported and fixed by a guide rail mounting plate, and a pad is set at the bottom end of the guide rail mounting plate, the second T-shaped lead screw is located on the longitudinal connecting plate, and the longitudinal connecting plate is fixedly connected to the guide rail mounting plates on both sides thereof through a transverse connecting plate, one end of the second T-shaped lead screw is drive-connected to the three-phase asynchronous motor 2 and the second reducer, and the other end of the second T-shaped lead screw is transmission-connected to the movable iron plate through a nut seat; a second origin sensor and a second end point sensor are respectively provided on one side of the movable iron plate, the second origin sensor is fixedly arranged on the bottom corner of one end of the movable iron plate through a third induction mounting plate, and the second end point sensor is fixedly arranged on the bottom corner of the other end of the movable iron plate through a fourth induction mounting plate.

[0013] A further technical solution is that the Z-axis lifting platform includes a hydraulic lift, a weight box, a weight pad, weights, a lifting ring, a travel switch and a travel switch mounting frame. A weight box is provided at the top of the hydraulic lift, and a weight pad is fixed inside the weight box. The specific number of weights is determined according to demand. A weight handle is connected to the side of each weight, and a weight fixing shaft is provided at the center of the corresponding weight. After being assembled through a lifting ring, they are placed in the weight box in sequence. The travel switch is connected to one side of the hydraulic lift through a travel switch mounting frame.

[0014] A further technical solution is that the support frame includes a base frame, a fixed frame, a buffer layer and a pulley, the support frame is fixed to the ground through the base frame, and the top of the base frame is connected to the fixed frame, the fixed frame is a cubic frame welded from a plurality of steel pipes, the buffer layer is fixed to the fixed frame by screws, and the pulley is fixed to the uppermost end of the buffer layer; a surrounding frame is provided around the support frame, one side of the surrounding frame is abutted against the support frame, the surrounding frame is composed of a frame and a protective net, and a protective net is fixed to the outer surface of the surrounding frame through the frame.

[0015] The working principle and advantages of this utility model are as follows:

[0016] In this case, the Y-axis mobile platform is set up so that it can move along the Y-axis direction, and the inclination angle of the climbing ladder to be tested relative to the abutment part is changed. The X-axis mobile platform can be used to adjust the orientation of the Z-axis lifting platform used for load testing along the X-axis direction, so that the steps of the climbing ladder to be tested and the orientation of the Z-axis lifting platform are adapted to each other. The experimental load can be adjusted by simply adding or subtracting weights, which simplifies the load test operation and is suitable for testing climbing ladders of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Attached Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Attached Figure 3 This is a schematic diagram of the structure of the X-axis moving platform of the utility model embodiment;

[0020] Attached Figure 4 This is a schematic diagram of the structure of the Y-axis moving platform of the embodiment of the utility model;

[0021] Attached Figure 5 This is a schematic diagram of the structure of the Z-axis lifting platform of the utility model embodiment;

[0022] Attached Figure 6 It is a structural schematic diagram of the support frame of an embodiment of the utility model.

[0023] In the above attached figure:

[0024] 1. Installation site; 2. X-axis mobile platform; 21. Horizontal fixing plate; 22. Platform support frame; 23. Frame pad; 24. First T-shaped screw; 25. Three-phase asynchronous motor 1; 26. First reducer; 27. Horizontal connecting plate; 28. Nut mounting block; 29. ​​Z-axis lifting platform mounting plate; 210. Clamping block; 211. First buffer block; 212. Buffer block mounting plate; 213. First guide rail; 214. Drag chain; 215. Drag chain mounting plate; 216. Induction block; 217. First origin sensor; 218. First induction mounting plate; 219. First end point sensor; 220. Second induction mounting plate; 3. Y-axis mobile platform; 31. Mobile iron plate; 32. Wooden board; 33. Limit block; 34. Heightening block; 35. Second guide rail; 36. Guide rail mounting plate; 37. Horizontal connecting plate; 38. Longitudinal connecting plate; 39. Pad; 310. Second T-shaped lead screw; 311. Nut seat; 312. Three-phase asynchronous motor 2; 313. Second reducer; 314. Second buffer block; 315. Buffer block mounting frame; 316. Second origin sensor; 317. Third induction mounting plate; 318. Second end sensor; 319. Fourth induction mounting plate; 4. Z-axis lifting platform; 41. Hydraulic lift; 42. Weight box; 43. Weight pad; 44. Weight; 45. Weight handle; 46. Weight fixing shaft; 47. Lifting ring; 48. Travel switch; 49. Travel switch mounting frame; 5. Support frame; 51. Base frame; 52. Fixed frame; 53. Buffer layer; 54. Pulley; 6. Surrounding frame; 7. Climbing ladder to be tested; 71. Single hinge; 72. Step. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0027] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0028] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0029] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0030] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0031] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0032] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0033] See attached Figure 1 As shown, a single-hinge load testing device for a climbing ladder of this embodiment includes an X-axis moving platform 2, a Y-axis moving platform 3, a Z-axis lifting platform 4 and a supporting frame 5.

[0034] The Y-axis moving platform 3 is arranged on the ground so that its position can be adjusted along the Y-axis direction.

[0035] The front side of the support frame 5 (referring to the front side in the Y-axis direction) serves as a support portion for the upper end of the climbing ladder 7 to be tested.

[0036] From a top view, the Y-axis moving platform 3 is located in front of the supporting frame 5 in the Y-axis direction, and the rear side of the Y-axis moving platform 3 has an abutment portion for the lower end of the climbing ladder 7 to be tested. That is, when 3 is above the ground, the rear side of 3 is the abutment portion; when 3 is flush with the ground or below the ground, a positioning groove may be provided at the rear of the upper surface of 3 as the abutment portion.

[0037] The X-axis moving platform 2 is spaced apart from the rear side of the Y-axis moving platform 3 in the Y-axis direction so that the ladder foot of the climbing ladder abuts against the rear side of 3 and is driven to translate along the X-axis direction.

[0038] The Z-axis lifting platform 4 is positioned on the X-axis moving platform 2 and is arranged corresponding to the steps 72 of the climbing ladder 7 to be tested.

[0039] Preferably, see Appendix Figure 3 As shown in the above structure, the X-axis moving platform 2 includes a horizontal fixed plate 21, a first T-shaped lead screw 24, a horizontal connecting plate 27 and a first guide rail 213, both left and right end surfaces of the horizontal fixed plate 21 are fixedly connected with the first guide rail 213, and the horizontal fixed plate 21 is fixedly arranged on the platform support frame 22, and the bottom end of the platform support frame 22 is evenly provided with a frame pad 23, the first T-shaped lead screw 24 is located on the horizontal fixed plate 21, and one end of the first T-shaped lead screw 24 is connected to the three-phase asynchronous motor 25, the first The reducer 26 is connected by driving, and the other end of the first T-shaped lead screw 24 is connected to the horizontal connecting plate 27 by a nut mounting block 28. The left and right ends of the horizontal connecting plate 27 are connected to the Z-axis lifting platform mounting plate 29 through a clamping block 210. The bottom ends of the two groups of Z-axis lifting platform mounting plates 29 are respectively connected to the corresponding first guide rails 213. One side of one group of first guide rails 213 is connected to a drag chain 214, and the drag chain 214 is fixed to one side of the platform support frame 22 through a drag chain mounting plate 215. Under the driving operation of the three-phase asynchronous motor 25, the first T-shaped lead screw 24 can be controlled to pull the Z-axis lifting platform mounting plates 29 on both sides of the horizontal connecting plate 27 to reciprocate on the symmetrical first guide rails 213. Under the traction and protection of the drag chain 214, the Z-axis lifting platform 4 set on the Z-axis lifting platform mounting plate 29 is driven to move in the X-axis direction, thereby realizing the position adjustment of the Z-axis lifting platform 4.

[0040] Specifically, first buffer blocks 211 are respectively provided at the four corners of the upper surface of the horizontal fixing plate 21, and four groups of first buffer blocks 211 are fixed on the inner side of the convex rail of the first guide rail 213 through the buffer block mounting plate 212. The first buffer blocks 211 are used to buffer the impact force generated by the reciprocating movement of the horizontal connecting plate 27, thereby extending the service life of the horizontal connecting plate 27.

[0041] More specifically, a sensing block 216 is provided on the Z-axis lifting platform mounting plate 29 on the same side as the drag chain 214. The sensing block 216 is located between the first origin sensor 217 and the first end sensor 219. The first origin sensor 217 is fixed to the side of one end of the horizontal fixed plate 21 through the first sensing mounting plate 218, and the first end sensor 219 is fixed to the side of the other end of the horizontal fixed plate 21 through the second sensing mounting plate 220. The first origin sensor 217 and the first end sensor 219 are respectively installed at the front and rear extreme positions of the X-axis moving platform 2, and the sensing control of the sensing block 216 by the two ensures that the X-axis moving platform 2 can reciprocate within the extreme positions.

[0042] Preferably, see Appendix Figure 4 As shown, in the above structure, the Y-axis movable platform 3 includes a movable iron plate 31, a second guide rail 35 and a second T-shaped lead screw 310, the upper surface of the movable iron plate 31 is fixedly connected to a wooden board 32 through a limit block 33, the left and right ends of the lower surface of the movable iron plate 31 are slidably connected to the second guide rail 35, and a pad block 34 is erected between the movable iron plate 31 and the second guide rail 35, the second guide rail 35 is supported and fixed by a guide rail mounting plate 36, and a pad 39 is provided at the bottom end of the guide rail mounting plate 36, the second T-shaped lead screw 310 is located on the longitudinal connecting plate 38, and the longitudinal connecting plate 38 is fixedly connected to the guide rail mounting plates 36 on both sides thereof through a transverse connecting plate 37, one end of the second T-shaped lead screw 310 is drive-connected to the three-phase asynchronous motor 2 312 and the second reducer 313, and the other end of the second T-shaped lead screw 310 is transmission-connected to the movable iron plate 31 through a nut seat 311. Under the driving operation of the three-phase asynchronous motor 312, the second T-shaped screw 310 can be controlled to pull the movable iron plate 31 to move back and forth on the symmetrical second guide rail 35, thereby driving the abutment part of the climbing ladder 7 to be tested to move along the Y-axis direction, thereby realizing the position adjustment of the climbing ladder 7 to be tested.

[0043] Specifically, the second guide rail 35 is provided with second buffer blocks 314 at both ends, and the two sets of second buffer blocks 314 are fixed on the inner side of the convex rail relative to the second guide rail 35 through the buffer block mounting frame 315. The second buffer blocks 314 are used to buffer the impact force generated by the reciprocating motion of the moving iron plate 31 to prevent the moving iron plate 31 from being damaged.

[0044] More specifically, a second origin sensor 316 and a second end point sensor 318 are respectively provided on one side of the moving iron plate 31. The second origin sensor 316 is fixed to the bottom corner of one end of the moving iron plate 31 through a third sensing mounting plate 317, and the second end point sensor 318 is fixed to the bottom corner of the other end of the moving iron plate 31 through a fourth sensing mounting plate 319. The front and rear limit positions of the Y-axis moving platform 3 are respectively sensed and controlled by the second origin sensor 316 and the second end point sensor 318 to ensure that the Y-axis moving platform 3 can move within the limit positions.

[0045] See attached Figure 5 As shown, the Z-axis lifting platform 4 includes a hydraulic lift 41, a weight box 42, a weight pad 43, a weight 44, a lifting ring 47, a travel switch 48 and a travel switch mounting frame 49. A weight box 42 is provided at the top of the hydraulic lift 41, and a weight pad 43 is fixed inside the weight box 42. The specific number of weights 44 is determined according to demand. The side of each weight 44 is connected to a weight handle 45, and the center of the weight 44 is correspondingly provided with a weight fixing shaft 46, and after being assembled through a lifting ring 47, they are placed in the weight box 42 in sequence, so that the weight 44 can be added at any time. The travel switch 48 is connected to one side of the hydraulic lift 41 through the travel switch mounting frame 49, and the upper and lower limit positions of the hydraulic lift 41 are controlled by the travel switch 48 to ensure that the Z-axis lifting platform 4 moves continuously and stably within the limit position.

[0046] See attached Figure 6 As shown, the support frame 5 includes a base frame 51, a fixing frame 52, a buffer layer 53 and a pulley 54. The base frame 51 is fixed to the bottom end of the fixing frame 52. The fixing frame 52 is a cubic frame formed by welding a plurality of steel pipes. The buffer layer 53 is fixed to the fixing frame 52 by screws. The fixing frame 52 can stably support the buffer layer 53. The pulley 54 is fixed to the uppermost end of the buffer layer 53. A surrounding frame 6 is provided on the periphery of the support frame 5. One side of the surrounding frame 6 is abutted against the support frame 5. The surrounding frame 6 is composed of a frame and a protective net. A protective net is fixed to the outer surface of the surrounding frame 6 through the frame, and the protective net can protect the climbing ladder 7 to be tested.

[0047] The working principle of this utility model:

[0048] Move the climbing ladder 7 to be tested to the buffer layer 53 close to the support frame 5, use the hook on the pulley 54 to hang the selected test step 72 on the climbing ladder 7 to be tested, and pull up the climbing ladder 7 to be tested by manual or machine traction rope, so that it leans against the buffer layer 53, so that the climbing ladder 7 to be tested and the Y-axis moving platform 3 form the required test angle. In this process, the support angle of the climbing ladder 7 to be tested can be changed by adjusting the position of the Y-axis moving platform 3 relative to the climbing ladder 7 to be tested along the Y-axis direction, so as to achieve the best test position for the climbing ladder 7 to be tested. This design can use the Y-axis moving platform 3 to move along the Y-axis direction to adapt the abutment position of the climbing ladder 7 to be tested. This method can be used to adjust the angle and orientation of climbing ladders 7 to be tested with different lengths when testing the load of a single hinge 71.

[0049] After the climbing ladder 7 to be tested is placed stably on the Y-axis moving platform 3, the Z-axis lifting platform 4 is adjusted to the optimal position relative to the climbing ladder 7 to be tested in the X-axis direction via the X-axis moving platform 2, and the Z-axis lifting platform 4 is started to control it to rise upward until the hook of the load on the Z-axis lifting platform 4 can be hung on the position and height of the step 72 of the climbing ladder 7 to be tested and stop; after the hook is firmly hung on the step 72 of the climbing ladder 7 to be tested, the Z-axis lifting platform 4 is lowered until the load added to the climbing ladder 7 to be tested is separated from the Z-axis lifting platform 4, and the Z-axis lifting platform 4 returns to the X-axis moving platform 2 again, and the test weight is changed by adding or removing the weight 44 in the weight box 42. After adjusting to the required load weight, the state at this time is maintained for a specified time to determine whether the load test of the single hinge 71 at the positioning connection of the climbing ladder 7 to be tested is qualified. In this way, by adjusting the position of the Z-axis lifting platform 4 along the Y-axis direction, the testing requirements for the single-hinge load capacity of ladders of various lengths can be met, and the convenience of the ladder load test can also be improved.

Claims

1. Single hinge load test device for climbing ladder, characterized by: It comprises an X-axis moving platform (2), a Y-axis moving platform (3), a Z-axis lifting platform (4) and a supporting frame (5); The Y-axis movable platform (3) is arranged on the ground in an adjustable position along the Y-axis direction; The front side of the support frame (5) serves as a support portion for the upper end of the climbing ladder (7) to be tested; When viewed from a top view, the Y-axis movable platform (3) is located on the front side of the support frame (5) in the Y-axis direction, and the rear side of the Y-axis movable platform (3) has an abutment portion for the lower end of the climbing ladder (7) to be tested; The X-axis moving platform (2) is arranged at a distance from the rear side of the Y-axis moving platform (3) in the Y-axis direction, and is driven to translate along the X-axis direction; The Z-axis lifting platform (4) is positioned on the X-axis moving platform (2) and is arranged corresponding to the steps (72) of the climbing ladder (7) to be tested.

2. The single hinge load testing device for climbing ladder according to claim 1, characterized in that: The X-axis moving platform (2) comprises a horizontal fixing plate (21), a first T-shaped lead screw (24), a horizontal connecting plate (27) and a first guide rail (213), the left and right end surfaces of the horizontal fixing plate (21) are fixedly connected to the first guide rail (213), and the horizontal fixing plate (21) is fixedly arranged on the platform support frame (22), and frame pads (23) are evenly arranged at the bottom end of the platform support frame (22), the first T-shaped lead screw (24) is located on the horizontal fixing plate (21), and one end of the first T-shaped lead screw (24) is connected to a three-phase asynchronous motor (25), a first reducer ( 26) driving connection, the other end of the first T-shaped lead screw (24) is transmission-connected to the horizontal connecting plate (27) through a nut mounting block (28), and the left and right ends of the horizontal connecting plate (27) are connected to a Z-axis lifting platform mounting plate (29) through a clamping block (210), and the bottom ends of the two groups of Z-axis lifting platform mounting plates (29) are respectively slidably connected to their corresponding first guide rails (213), and one side of one group of the first guide rails (213) is connected to a drag chain (214), and the drag chain (214) is fixed to one side of the platform support frame (22) through a drag chain mounting plate (215).

3. The single hinge load testing device for climbing ladder according to claim 2, characterized in that: First buffer blocks (211) are respectively provided at the four corners of the upper surface of the horizontal fixed plate (21), and the four groups of first buffer blocks (211) are all fixedly mounted on the inner side of the first guide rail (213) via a buffer block mounting plate (212).

4. The single hinge load testing device for climbing ladder according to claim 2, characterized in that: A sensing block (216) is provided on the Z-axis lifting platform mounting plate (29) on the same side as the drag chain (214), and the sensing block (216) is located between a first origin sensor (217) and a first end point sensor (219). The first origin sensor (217) is fixed to the side of one end of the horizontal fixing plate (21) via a first sensing mounting plate (218), and the first end point sensor (219) is fixed to the side of the other end of the horizontal fixing plate (21) via a second sensing mounting plate (220).

5. The single hinge load testing device for climbing ladder according to claim 1, characterized in that: The Y-axis moving platform (3) comprises a moving iron plate (31), a second guide rail (35) and a second T-shaped lead screw (310); the upper surface of the moving iron plate (31) is fixedly connected to a wooden board (32) via a limit block (33); both left and right ends of the lower surface of the moving iron plate (31) are slidably connected to the second guide rail (35); a padding block (34) is provided between the moving iron plate (31) and the second guide rail (35); the second guide rail (35) is supported and fixed by a guide rail mounting plate (36); A pad (39) is provided at the bottom end of each mounting plate (36); the second T-shaped lead screw (310) is located on the longitudinal connecting plate (38); the longitudinal connecting plate (38) is fixedly connected to the guide rail mounting plates (36) on both sides thereof via transverse connecting plates (37); one end of the second T-shaped lead screw (310) is drivingly connected to a second three-phase asynchronous motor (312) and a second reducer (313); and the other end of the second T-shaped lead screw (310) is drivingly connected to the movable iron plate (31) via a nut seat (311).

6. The single hinge load testing device for climbing ladder according to claim 5, characterized in that: Second buffer blocks (314) are provided at both the front and rear ends of the second guide rail (35), and two groups of second buffer blocks (314) are fixedly mounted on the inner side relative to the second guide rail (35) via buffer block mounting frames (315).

7. The single hinge load testing device for climbing ladder according to claim 5, characterized in that: A second origin sensor (316) and a second end point sensor (318) are respectively provided on one side of the movable iron plate (31); the second origin sensor (316) is fixedly mounted on a bottom corner of one end of the movable iron plate (31) via a third sensing mounting plate (317); and the second end point sensor (318) is fixedly mounted on a bottom corner of the other end of the movable iron plate (31) via a fourth sensing mounting plate (319).

8. The single hinge load testing device for climbing ladder according to claim 1, characterized in that: The Z-axis lifting platform (4) comprises a hydraulic lift (41), a weight box (42), a weight pad (43), a weight (44), a lifting ring (47), a travel switch (48) and a travel switch mounting frame (49). The top of the hydraulic lift (41) is provided with a weight box (42), the weight pad (43) is fixedly arranged inside the weight box (42), the specific number of the weights (44) is determined according to demand, the side of each weight (44) is connected to a weight handle (45), and the center of the weight (44) is correspondingly provided with a weight fixing shaft (46), and the weights (44) are assembled through the lifting ring (47) and placed in the weight box (42) in sequence. The travel switch (48) is connected to one side of the hydraulic lift (41) through the travel switch mounting frame (49).

9. The single hinge load testing device for climbing ladder according to claim 1, characterized in that: The support frame (5) comprises a base frame (51), a fixing frame (52), a buffer layer (53) and a pulley (54). The support frame (5) is fixed on the ground via the base frame (51), and the upper part of the base frame (51) is connected to the fixing frame (52). The fixing frame (52) is a cubic frame formed by welding a plurality of steel pipes. The buffer layer (53) is fixed to the fixing frame (52) via screws, and the pulley (54) is fixed to the uppermost end of the buffer layer (53).

10. The single hinge load testing device for climbing ladder according to claim 9, characterized in that: A surrounding frame (6) is provided on the periphery of the supporting frame (5), one side of the surrounding frame (6) is in abutment with the supporting frame (5), the surrounding frame (6) is composed of a frame and a protective net, and the outer surface of the surrounding frame (6) is fixed with a protective net via the frame.

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