High-strength lightweight composite section folding ladder with false touch locking structure

Abstract

The application belongs to the technical field of folding ladders and discloses a high-strength light-weight composite profile folding ladder with a mistaken touch locking structure, which comprises a base plate, a fixed supporting plate, a stable jacking assembly, a locking and adjusting assembly, a width adjusting assembly and an automatic folding connecting assembly. The stable jacking assembly comprises a sliding plate, and the upper surface of the sliding plate is fixedly connected with a mounting plate at one end. When a better height is needed, the automatic folding connecting assembly can be used for secondary folding, the whole folding ladder can form an inverted V shape, and the height can be temporarily adjusted to better adapt to the working environment. When the width of the working environment is limited, the width adjusting assembly can be used to adjust the width of the folding ladder, thereby greatly improving the practical value of the folding ladder. In the use process of the folding ladder, the stable jacking assembly can be used to support the folding ladder, thereby ensuring the stability of the folding ladder in the working process and improving the safety of the folding ladder.

Description

Technical Field

[0001] This invention belongs to the field of folding ladder technology, and in particular relates to a high-strength, lightweight composite folding ladder with an accidental locking structure. Background Technology

[0002] A folding ladder is a step ladder with one or more (usually no more than three) one-way hinges. It is ideal for use on uneven surfaces such as stairs, as a walkway, or as a fully unfolded, fixed ladder. Some variations feature a central one-way hinge and extendable locking legs.

[0003] A search revealed that application number CN201620781822.2 discloses a portable quick-folding ladder. This utility model includes an inner frame, a middle frame, and an outer frame. A first hinge connects the inner and middle frames, and a second hinge connects the middle and outer frames. The inner, middle, and outer frames are combined to form frame units, and adjacent frame units are hinged to each other by a third hinge. This utility model uses a combination of the inner, middle, and outer frames, unfolding into a single plane, saving space and allowing the user to move freely in confined spaces. When the inner, middle, and outer frames are folded together, they enhance stability and are safe and convenient to use. A crossbar and diagonal support rods are installed on the crossbars, providing temporary rest areas for workers and improving work efficiency.

[0004] The problems with the above technical solutions are as follows: Existing folding ladders require manual operation using latches to unfold them, which significantly increases labor costs. Since folding ladders are mostly used for climbing, this also makes unfolding them inconvenient. Furthermore, when folded and stationary, the unfolding latches are easily triggered, causing the ladder to unfold due to inertia. Additionally, the width of most folding ladders makes it difficult to extend their width during use, limiting the working environment when climbing and causing instability and shaking during height extension. This reduces both the practicality of the folding ladder and processing efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a high-strength, lightweight composite folding ladder with an accidental locking structure that can overcome or at least partially solve the above problems.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: a high-strength, lightweight composite profile folding ladder with an accidental locking structure, comprising a base plate, a fixed support plate, a stabilizing lifting assembly, a locking adjustment assembly, a width adjustment assembly, and an automatic folding connection assembly. The stabilizing lifting assembly includes a sliding plate, with three sliders fixedly connected to both sides of the sliding plate. The three sliders are installed in a first sliding groove. A mounting plate is fixedly connected to one end of the upper surface of the sliding plate. A first motor and a first worm gear are rotatably mounted on the mounting plate. The output shaft of the first motor is fixedly connected to one end of the first worm gear. The locking adjustment assembly includes a mounting rod and a rotating shaft. The mounting rod and the rotating shaft are rotatably mounted between the inner surfaces below the mounting bracket and extend into the mounting grooves on both sides of the mounting bracket. Both ends of the rod and the rotating shaft are fixedly fitted with rollers. Each roller is fixedly connected to a transmission gear. Each transmission gear is connected to a toothed plate below it via a snap-fit ​​mechanism. The toothed plates on both sides are fixedly connected to the upper surface of the base plate. The automatic folding connection assembly includes a No. 3 motor, which is fixedly connected to the upper end of the No. 2 slide groove on both sides. The output shaft of the No. 3 motor on both sides is fixedly connected to a No. 2 lead screw. The No. 2 lead screw on both sides is rotatably installed between the inner surfaces of the No. 2 slide groove. The No. 2 lead screw on both sides is connected to a No. 1 slider through surface thread engagement. The width adjustment assembly includes a fixed slide rail. An extension slide rail is movably installed on one side of the fixed slide rail. A fixed housing is fixedly connected to the middle of the fixed slide rail and the extension slide rail via a connecting block. A No. 2 slider is fixedly connected to the upper surface of the fixed housing.

[0007] Preferably, four fixed support plates are provided, arranged in pairs on both sides above the base plate. The lower ends of the fixed support plates on both sides are mounted on the width adjustment components. One width adjustment component is fixedly connected to one side of the upper surface of the base plate, and the other width adjustment component is fixedly connected to the upper surface of the mounting bracket. A locking adjustment component is installed in the mounting bracket. Each locking adjustment component is equipped with a balance wheel and a support wheel through a mounting sheet metal. The locking adjustment component is also provided with a limit slot.

[0008] Preferably, a first sliding groove is provided in the middle of the upper surface of the base plate, and a stabilizing lifting component is installed in the first sliding groove. Two connecting plates are installed on the stabilizing lifting component. Several evenly distributed telescopic support rods are fixedly installed between the fixed support plates on both sides. A second sliding groove is provided at the upper end of the telescopic fixed support plates on both sides, and an automatic folding connecting component is installed in the second sliding groove on both sides. A folding support plate is installed on the automatic folding connecting component. Several evenly distributed telescopic support rods are also fixedly connected between the folding support plates on both sides. Two connecting plates are installed between the two telescopic support rods at the bottom of the folding support plates on both sides.

[0009] Preferably, a first worm gear is threadedly connected to the top of the first worm, and the first worm gears on both sides are fixedly sleeved on one end of the rotating rod. The rotating rods on both sides are rotatably mounted on the upper end of the bearing plate. A bevel gear is fixedly sleeved on the other end of the rotating rods on both sides. Another bevel gear is fixedly sleeved on the lower end of the first lead screw. Each first lead screw is rotatably mounted on the upper surface of the sliding plate. A threaded push rod is threadedly connected to the upper end of the first lead screw on both sides. The threaded push rod is fixedly connected to the lower surface of one side of the connecting plate.

[0010] Preferably, a mounting base is rotatably mounted in the middle of the mounting rod, an electric push rod is fixedly connected to one side of the mounting base, a transmission rod is rotatably mounted on the output shaft of the electric push rod, and frame frames are rotatably mounted at both ends of the transmission rod. One end of each frame frame is rotatably mounted on a first fixing rod, the first fixing rod is fixedly connected to the edge of the front end of the mounting bracket, and the frame frames extend to the front of one side of the mounting bracket.

[0011] Preferably, a load-bearing plate and a second connecting rod are fixedly connected to the other end of the two side frames. An insert plate is fixedly connected to the lower surface of the load-bearing plate. A second worm gear is fixedly sleeved in the middle of the rotating shaft. A second worm is threadedly connected to one side of the second worm gear. The second worm is fixedly connected to the output shaft of the second motor. The second motor is fixedly connected to the lower surface of the mounting bracket.

[0012] Preferably, the two ends of the fixed outer shell are installed in the third slide groove of the telescopic outer shell via the second slider. The third slide groove is located on the upper surface of the telescopic outer shell. A dual-axis motor is fixedly connected to the middle of the inner wall of the fixed outer shell. The output shafts of the dual-axis motor are fixedly connected to the third lead screw. The third lead screws on both sides are connected to threaded mating blocks through threaded engagement. The threaded mating blocks on both sides are fixedly connected to the inner wall of the telescopic outer shell. A base plate is fixedly connected to the upper surface of the telescopic outer shell on both sides. A central shaft is fixedly connected inside the base plate on both sides.

[0013] Preferably, a fourth motor is fixedly connected to the inner surface of the first slider on one side, and a rotating telescopic rod is fixedly connected to the output shaft of the fourth motor. The other end of the rotating telescopic rod is fixedly connected to the surface of the first slider on the other side. Both ends of the rotating telescopic rod are uniformly fitted with driving gears. A connecting sheet metal is rotatably installed near the driving gear. A driven gear is rotatably installed on the other side of the connecting sheet metal. The driving gear and the driven gear are connected together by meshing teeth. A second fixing rod is fixedly connected to the other end of the connecting sheet metal.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention utilizes a locking and adjusting component to move a fixed support plate along the base plate to one side, simultaneously folding and unfolding the entire folding ladder. This facilitates both unfolding and folding. When unfolded, the ladder can be secured to prevent tilting due to impact. Once the unfolded width is determined, it forms an M-shape. For further height adjustments, an automatic folding connection component allows for a secondary fold, forming an inverted V-shape. The height can also be briefly adjusted for better suitability for the work environment. When the work environment has limited width, the width adjustment component can be used to adjust the ladder's width, significantly enhancing its practicality. During use, a stabilizing lifting component provides support, ensuring stability and improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic perspective view of the overall structure provided in the embodiment of the present invention;

[0017] Figure 2 This is a schematic perspective view of the stable lifting component structure provided in an embodiment of the present invention;

[0018] Figure 3 This is a top view of the locking adjustment component provided in an embodiment of the present invention.

[0019] Figure 4 This is a bottom-view perspective view of the locking adjustment component provided in an embodiment of the present invention;

[0020] Figure 5 This is a partial structural schematic perspective view provided in an embodiment of the present invention;

[0021] Figure 6 This is a schematic perspective view of the automatic folding connection component structure provided in an embodiment of the present invention;

[0022] Figure 7 This is provided by the embodiments of the present invention. Figure 6 Enlarged 3D structural diagram at point a;

[0023] Figure 8 This is a three-dimensional schematic diagram of the width adjustment component structure provided in an embodiment of the present invention.

[0024] In the diagram: 1. Base plate; 2. No. 1 slide groove; 3. Stabilizing lifting component; 4. Mounting bracket; 5. Locking adjustment component; 6. Mounting sheet metal; 7. Balance wheel; 8. Mounting groove; 9. Support wheel; 10. Limiting slot; 11. Width adjustment component; 12. Fixed support plate; 13. Telescopic support rod; 14. Automatic folding connection component; 15. Folding support plate; 16. Connecting plate; 17. No. 2 slide groove; 301. Sliding plate; 302. No. 3 slider; 303. Mounting plate; 304. No. 1 motor; 305. No. 1 worm gear; 306. No. 1 worm wheel; 307. Rotating rod; 308. Bearing plate; 309. Bevel gear; 310. No. 1 lead screw; 311. Threaded top rod; 501. Mounting rod; 502. Roller; 503. Transmission gear; 504. Gear plate; 505. Mounting seat; 506. Electric... 507. Moving push rod; 508. Transmission rod; 509. Frame; 510. Fixed rod No. 1; 511. Connecting rod No. 2; 512. Load-bearing plate; 513. Insert plate; 514. Rotating shaft; 515. Worm gear No. 2; 516. Motor No. 2; 401. Motor No. 3; 402. Lead screw No. 2; 403. Slider No. 1; 404. Fixed rod No. 2; 405. Connecting sheet metal; 406. Rotary telescopic rod; 407. Drive gear; 408. Motor No. 4; 409. Driven gear; 101. Fixed slide rail; 102. Extension slide rail; 103. Telescopic housing; 104. Base plate; 105. Central shaft; 106. No. 3 slide groove; 107. Threaded mating block; 108. No. 3 lead screw; 109. Fixed housing; 110. No. 2 slider; 111. Connecting block; 112. Dual-axis motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] Example 1:

[0028] like Figures 1 to 8As shown in the figure, an embodiment of the present invention provides a high-strength lightweight composite folding ladder with an accidental locking structure, including a base plate 1, a fixed support plate 12, a stabilizing lifting assembly 3, a locking adjustment assembly 5, a width adjustment assembly 11, and an automatic folding connection assembly 14. The stabilizing lifting assembly 3 includes a sliding plate 301, with three sliders 302 fixedly connected to both sides of the sliding plate 301. The three sliders 302 are installed in a first slide groove 2. A mounting plate 303 is fixedly connected to one end of the upper surface of the sliding plate 301. A first motor 304 and a first worm gear 305 are rotatably mounted on the mounting plate 303. The output shaft of the first motor 304 is fixedly connected to one end of the first worm gear 305. The locking adjustment assembly 5 includes a mounting rod 501 and a rotating shaft 513. The mounting rod 501 and the rotating shaft 513 are rotatably mounted between the inner surfaces below the mounting bracket 4 and extend into the mounting grooves 8 on both sides of the mounting bracket 4. Each end is fixedly fitted with a roller 502, and a transmission gear 503 is fixedly connected to the surface of each roller 502. A toothed plate 504 is connected to the bottom of each transmission gear 503 through a snap-fit. The toothed plates 504 on both sides are fixedly connected to the upper surface of the base plate 1. The automatic folding connection assembly 14 includes a third motor 401, which is fixedly connected to the upper end of the second slide groove 17 on both sides. The output shaft of the third motor 401 on both sides is fixedly connected to a second lead screw 402. The second lead screw 402 on both sides is rotatably installed between the inner surfaces of the second slide groove 17. The second lead screw 402 on both sides is connected to a first slider 403 through a threaded engagement on its surface. The width adjustment assembly 11 includes a fixed slide rail 101. An extension slide rail 102 is movably installed on one side of the fixed slide rail 101. A fixed housing 109 is fixedly connected to the middle of the fixed slide rail 101 and the extension slide rail 102 through a connecting block 111. A second slider 110 is fixedly connected to the upper surface of the fixed housing 109.

[0029] Four fixed support plates 12 are provided, arranged in pairs on both sides above the base plate 1. The lower ends of both fixed support plates 12 are mounted on width adjustment components 11. One width adjustment component 11 is fixedly connected to one side of the upper surface of the base plate 1, and the other width adjustment component 11 is fixedly connected to the upper surface of the mounting bracket 4. A locking adjustment component 5 is installed inside the mounting bracket 4. Each locking adjustment component 5 is equipped with a balance wheel 7 and a support wheel 9 via a mounting sheet metal 6. The locking adjustment component 5 is also equipped with a limit slot 10. The base plate 1 A first slide groove 2 is provided in the middle of the upper surface. A stabilizing lifting component 3 is installed in the first slide groove 2. Two connecting plates 16 are installed on the stabilizing lifting component 3. Several evenly distributed telescopic support rods 13 are fixedly installed between the two side fixed support plates 12. A second slide groove 17 is provided at the upper end of the two side telescopic fixed support plates 12. An automatic folding connecting component 14 is installed in the two side second slide grooves 17. A folding support plate 15 is installed on the automatic folding connecting component 14. Several evenly distributed support rods 15 are also fixedly connected between the two side folding support plates 15. The telescopic support rod 13 has two connecting plates 16 installed between the two lowest telescopic support rods 13 on both sides of the folding support plate 15. The locking adjustment component 5 can drive the fixed support plate 12 on one side to move along the base plate 1 to one side, which can drive the entire folding ladder to fold and store at the same time, and also drive the entire folding ladder to unfold, making it easy to unfold and fold the folding ladder. When the folding ladder is unfolded, it can be fixed to prevent the folding ladder from tilting due to being touched. When the unfolded width of the folding ladder is determined, it forms an M shape. When a better height is needed, the automatic folding connecting component 14 can perform a second fold, making the entire folding ladder form an inverted V shape. The height can also be adjusted briefly to better suit the working environment. When the width of the working environment is limited, the width of the folding ladder can be adjusted by the width adjustment component 11, which can greatly improve the practical value of the folding ladder. During the use of the folding ladder, the stabilizing lifting component 3 supports the folding ladder to ensure the stability of the folding ladder during the working process and improve the safety of the folding ladder.

[0030] Example 2:

[0031] A first worm gear 306 is threadedly connected to the top of the first worm 305. Two first worm gears 306 are fixedly sleeved on one end of a rotating rod 307. The two rotating rods 307 are rotatably mounted on the upper end of a bearing plate 308. A bevel gear 309 is fixedly sleeved on the other end of the two rotating rods 307. Another bevel gear 309 is fixedly sleeved on the lower end of a first lead screw 310. Each first lead screw 310 is rotatably mounted on the upper surface of a sliding plate 301. Threaded push rods 311 are threadedly connected to the upper ends of the two first lead screws 310. The threaded push rods 311 are fixed... Connected to the lower surface of the connecting plate 16 on one side, the first motor 304 drives the first worm gear 305 to rotate. Since the first worm gear 305 is connected to the first worm wheel 306 through threaded engagement, the first worm wheel 306 can drive the rotating rod 307 to rotate. The rotating rod 307 drives the first lead screw 310 to rotate through the bevel gear 309. Since the upper end of the first lead screw 310 is connected to the threaded top rod 311 through threaded engagement, the threaded top rod 311 can hold the bottom of the connecting plate 16, thus supporting the entire folding ladder and ensuring its stability.

[0032] A mounting base 505 is rotatably mounted in the middle of the mounting rod 501. An electric push rod 506 is fixedly connected to one side of the mounting base 505. A transmission rod 507 is rotatably mounted on the output shaft of the electric push rod 506. Frames 508 are rotatably mounted at both ends of the transmission rod 507. One end of each side frame 508 is rotatably mounted on a first fixing rod 509, which is fixedly connected to the edge of the front end of the mounting bracket 4. The side frames 508 extend to the front of one side of the mounting bracket 4. A load-bearing plate 511 and a second connecting rod 510 are fixedly connected to the other end of each side frame 508. An insert plate 512 is fixedly connected to the lower surface of the load-bearing plate 511. A rotating shaft 51... The middle part of the 3 is fixedly fitted with a second worm gear 514. The second worm gear 514 is connected to a second worm 515 by a threaded engagement on one side. The second worm 515 is fixedly connected to the output shaft of the second motor 516. The second motor 516 is fixedly connected to the lower surface of the mounting bracket 4. When the electric push rod 506 is activated, the output shaft is retracted, which can adjust the distance between the mounting rod 501 and the transmission rod 507. This can drive the frame 508 to move downward around the first fixed rod 509 as the center. The insert plate 512 at the lower end of the frame 508 can be inserted into the limiting slot 10 to fix the width of the folding ladder and prevent the folding ladder from becoming unstable due to contact.

[0033] Example 3:

[0034] The two ends of the fixed outer shell 109 are installed in the third slide groove 106 of the telescopic outer shell 103 via the second slide block 110. The third slide groove 106 is set on the upper surface of the telescopic outer shell 103. A dual-axis motor 112 is fixedly connected to the middle of the inner wall of the fixed outer shell 109. The output shafts of the two ends of the dual-axis motor 112 are fixedly connected to the third lead screw 108. The third lead screw 108 on both sides is threadedly engaged with threaded mating blocks 107. The threaded mating blocks 107 on both sides are fixedly connected to the inner wall of the telescopic outer shell 103. The upper surface of the telescopic outer shell 103 on both sides is fixedly connected to the base plate 104. The central shaft 105 is fixedly connected inside the base plate 104 on both sides. The dual-axis motor 112 drives the third lead screw 108 on both sides to rotate. Since the third lead screw 108 is threadedly engaged with the threaded mating blocks 107, it can drive the two extension shells 103 on both sides to extend outwards along the second slide block 110 with the fixed outer shell 109 as the center, so as to achieve the effect of adjusting the width of the folding ladder and making it more suitable for various working environments.

[0035] A fourth motor 408 is fixedly connected to the inner surface of slider 403 on one side. The output shaft of motor 408 is fixedly connected to a rotating telescopic rod 406. The other end of the rotating telescopic rod 406 is fixedly connected to the surface of slider 403 on the other side. Drive gears 407 are evenly fixedly fitted at both ends of the rotating telescopic rod 406. A connecting sheet metal 405 is rotatably mounted near the drive gear 407. A driven gear 409 is rotatably mounted on the other side of the connecting sheet metal 405. The drive gear 407 and the driven gear 409 are connected together by meshing teeth. A second fixing rod 4 is fixedly connected to the other end of the connecting sheet metal 405. 04. By rotating the second lead screw 402 driven by the third motor 401, the first slider 403 can move up and down in the second slide groove 17, allowing for a brief height adjustment of the upper part of the folding ladder. Then, by rotating the rotating telescopic rod 406 driven by the fourth motor 408, the driving gear 407 can rotate. Since the driving gear 407 is connected to the driven gear 409 through a meshing mechanism, and is rotatably mounted on the rotating telescopic rod 406 via the connecting sheet metal 405, the connecting sheet metal 405 and the second fixed rod 404 can rotate around the center of the rotating telescopic rod 406, allowing the folding ladder to be extended through a second fold. Working principle of this invention:

[0036] In use, the locking adjustment component 5 first moves the fixed support plate 12 along the base plate 1 to one side, which can fold and store the entire folding ladder at the same time, making it easy to unfold and fold. When unfolded, the folding ladder can be fixed to prevent it from tilting due to contact. Once the unfolded width is determined, it forms an M-shape. If a higher height is needed, the automatic folding connection component 14 can perform a second fold, making the entire folding ladder form an inverted V-shape. The height can also be briefly adjusted to better suit the working environment. When the width of the working environment is limited, the width adjustment component 11 can be used to adjust the width of the folding ladder, which can greatly improve the practical value of the folding ladder. Finally, during use, the stabilizing lifting component 3 supports the folding ladder, ensuring its stability during operation and improving its safety.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can exercise their rights without departing from the scope of the present invention.

Claims

1. A high-strength, lightweight composite folding ladder with an accidental locking structure, comprising a base plate (1), a fixed support plate (12), a stabilizing lifting assembly (3), a locking adjustment assembly (5), a width adjustment assembly (11), and an automatic folding connection assembly (14), characterized in that: The stabilizing lifting assembly (3) includes a sliding plate (301), with three sliders (302) fixedly connected to both sides of the sliding plate (301). The three sliders (302) are installed in the first groove (2). A mounting plate (303) is fixedly connected to one end of the upper surface of the sliding plate (301). A motor (304) and a worm gear (305) are rotatably mounted on the mounting plate (303). The output shaft of the motor (304) is fixedly connected to one end of the worm gear (305). A worm wheel (306) is threadedly connected above the worm gear (305). The first worm gear (306) is fixedly sleeved on one end of the rotating rod (307). The two rotating rods (307) on both sides are rotatably mounted on the upper end of the bearing plate (308). The other end of the two rotating rods (307) on both sides is fixedly sleeved with a bevel gear (309). Another bevel gear (309) is fixedly sleeved on the lower end of the first lead screw (310). Each first lead screw (310) is rotatably mounted on the upper surface of the sliding plate (301). The upper ends of the two first lead screws (310) on both sides are connected to a threaded push rod (311) through threaded engagement. The threaded push rod (311) is fixedly connected to the lower table of the connecting plate (16) on one side. The locking adjustment assembly (5) includes a mounting rod (501) and a rotating shaft (513). The mounting rod (501) and the rotating shaft (513) are rotatably mounted between the inner surfaces below the mounting bracket (4) and extend into the mounting grooves (8) on both sides of the mounting bracket (4). Rollers (502) are fixedly sleeved at both ends of the extended ends of the mounting rod (501) and the rotating shaft (513). A transmission gear (503) is fixedly connected to the surface of each roller (502). A toothed plate (504) is connected below each transmission gear (503) through a snap-fit. The toothed plates (504) on both sides are fixedly connected. It is attached to the upper surface of the base plate (1); the mounting rod (501) is rotatably mounted with a mounting base (505) in the middle, and an electric push rod (506) is fixedly connected to one side of the mounting base (505). The output shaft of the electric push rod (506) is rotatably mounted with a transmission rod (507). The transmission rod (507) is rotatably mounted with a frame (508) at both ends. One end of the frame (508) on both sides is rotatably mounted on a first fixing rod (509). The first fixing rod (509) is fixedly connected to the edge of the front end of the mounting bracket (4). The frame (508) on both sides extends to the front of one side of the mounting bracket (4).The other end of the two side frames (508) is fixedly connected to a load-bearing plate (511) and a second connecting rod (510). The lower surface of the load-bearing plate (511) is fixedly connected to an insert plate (512). The middle part of the rotating shaft (513) is fixedly fitted with a second worm gear (514). One side of the second worm gear (514) is threadedly connected to a second worm (515). The second worm (515) is fixedly connected to the output shaft of the second motor (516). The second motor (516) is fixedly connected to the lower surface of the mounting bracket (4). The automatic folding connection assembly (14) includes a third motor (401). The third motor (401) is fixedly connected to the upper end of the two second sliding grooves (17) on both sides. The output shaft of the motor (401) is fixedly connected to a second lead screw (402). The two second lead screws (402) on both sides are rotatably installed between the inner surfaces of the second slide groove (17). The two second lead screws (402) on both sides are connected to a first slider (403) through surface thread engagement. The inner surface of the first slider (403) on one side is fixedly connected to a fourth motor (408). The output shaft of the fourth motor (408) is fixedly connected to a rotating telescopic rod (406). The other end of the rotating telescopic rod (406) is fixedly connected to the surface of the first slider (403) on the other side. The two ends of the rotating telescopic rod (406) are evenly fixedly fitted with drive gears (407). A rotatably installed drive gear (407) is also mounted on the side near the drive gear (407). A connecting sheet metal (405) is provided, on the other side of which a driven gear (409) is rotatably mounted. The driving gear (407) and the driven gear (409) are connected together by meshing teeth. A second fixing rod (404) is fixedly connected to the other end of the connecting sheet metal (405). The width adjustment component (11) includes a fixed slide rail (101), on one side of which an extension slide rail (102) is movably mounted. A fixed housing (109) is fixedly connected to the middle of the fixed slide rail (101) and the extension slide rail (102) through a connecting block (111). A second slider (110) is fixedly connected to the upper surface of the fixed housing (109). The fixed housing (109) has a second slider (110). The telescopic housing (103) is mounted on the third slide groove (106) at both ends via the second slider (110). The third slide groove (106) is located on the upper surface of the telescopic housing (103). A dual-axis motor (112) is fixedly connected to the middle of the inner wall of the fixed housing (109). The output shafts at both ends of the dual-axis motor (112) are fixedly connected to the third lead screw (108). The third lead screw (108) on both sides is threadedly engaged with threaded mating blocks (107). The threaded mating blocks (107) on both sides are fixedly connected to the inner wall of the telescopic housing (103). The upper surfaces of the telescopic housing (103) on both sides are fixedly connected to the base plate (104). The base plate (104) on both sides is fixedly connected to the center shaft (105).

2. The high-strength, lightweight composite folding ladder with an accidental locking structure according to claim 1, characterized in that: The fixed support plate (12) is provided in four pairs on both sides above the base plate (1). The lower ends of the fixed support plate (12) on both sides are installed on the width adjustment component (11). One side of the width adjustment component (11) is fixedly connected to one side of the upper surface of the base plate (1), and the other side of the width adjustment component (11) is fixedly connected to the upper surface of the mounting bracket (4). The mounting bracket (4) is equipped with a locking adjustment component (5). Each locking adjustment component (5) is equipped with a balance wheel (7) and a support wheel (9) through a mounting sheet metal (6). The locking adjustment component (5) is also equipped with a limit slot (10).

3. A high-strength, lightweight composite folding ladder with an accidental locking structure according to claim 2, characterized in that: A first groove (2) is provided in the middle of the upper surface of the base plate (1). A stabilizing lifting component (3) is installed in the first groove (2). Two connecting plates (16) are installed on the stabilizing lifting component (3). Several evenly distributed telescopic support rods (13) are fixedly installed between the two fixed support plates (12) on both sides. A second groove (17) is provided at the upper end of the telescopic fixed support plates (12) on both sides. An automatic folding connecting component (14) is installed in the second groove (17) on both sides. A folding support plate (15) is installed on the automatic folding connecting component (14). Several evenly distributed telescopic support rods (13) are also fixedly connected between the two folding support plates (15) on both sides. Two connecting plates (16) are installed between the two telescopic support rods (13) at the bottom of the two folding support plates (15) on both sides.

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