Lifting ladder capable of being flexibly adjusted

Abstract

The utility model discloses a lifting ladder capable of being adjusted flexibly, which relates to the field of lifting ladders and comprises a frame, and a pair of first rotating rods and a pair of second rotating rods are arranged at the top end of the frame at intervals along the height direction. A first connecting rod which is kept in a vertical state is rotationally connected between the two corresponding connecting shafts of the first rotating rod and the second rotating rod in the height direction at the same time, the top of the first connecting rod is fixedly connected with one side of a bearing plate, and the other side of the bearing plate is fixedly connected with an inclined second connecting rod; the end, away from the fixing table, of the frame is slidably connected with a balancing weight in the vertical direction, and the balancing weight is connected with the fixing table through an inhaul cable. According to the lifting ladder, the surface of the bearing plate on the connecting rod structure faces upwards all the time when the rotating rod rotates, the end of the rotating rod and the balancing weight are connected through the inhaul cable structure, the difficulty of putting down or lifting up the rotating rod is effectively lowered, and the lifting ladder can be used more easily.

Description

Technical Field

[0001] The utility model relates to the field of lifting ladders, in particular to a lifting ladder with flexible adjustment. Background Technique

[0002] Lifting ladders have functions such as folding and shrinking, which can save a large amount of space when not in use, and are particularly important for some usage scenarios with limited space.

[0003] When the existing ladders with folding functions are in use, generally, the user needs to manually lower the rotating rod of the ladder, adjust the angle of the rotating rod, and use the connecting rod structure between the rotating rods to unfold each level of the ladder. After use, the rotating rod also needs to be manually lifted.

[0004] In view of the above related technologies, when the existing ladder lowers the rotating rod, due to the large self-weight of the rotating rod itself and the connecting rod structure of the ladder, it is not easy to control the unfolding speed when lowering the rotating rod, and accidents are likely to occur during the unfolding process. In the folding work after the ladder is used, it is quite strenuous to manually lift the heavy rotating rod and the connecting rod structure of the ladder. Without increasing the manufacturing cost of components such as motors, using a manual lifting ladder is rather troublesome. To sum up, the existing lifting ladders with folding functions have the problem of inconvenient unfolding and folding. Content of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide a lifting ladder with flexible adjustment to solve the technical problem that the existing lifting ladders with folding functions are not convenient enough for unfolding and folding.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A lifting ladder with flexible adjustment, including a frame. At the top of the frame, a pair of first rotating rods and a pair of second rotating rods are arranged at intervals along the height direction. Along the length direction of the top surfaces of the first rotating rod and the second rotating rod, connecting shafts are connected at intervals. Between the two connecting shafts corresponding to each other along the height direction of the first rotating rod and the second rotating rod, a first connecting rod that remains in a vertical state is rotatably connected at the same time. One side of the top of the first connecting rod is fixedly connected to one side of a bearing plate. The other side of the bearing plate is fixedly connected with an inclined second connecting rod. The end of the second connecting rod far from the bearing plate is rotatably connected to the connecting shaft of the second rotating rod. The end of the first rotating rod far from its own rotating shaft is fixedly connected with a fixed platform. At one end of the frame far from the fixed platform, a counterweight block is slidably connected along the vertical direction. The counterweight block and the fixed platform are connected by a cable. A plurality of guide shafts are connected to the top of the frame. The cable bypasses the guide shafts to connect the counterweight block and the fixed platform.

[0007] By adopting the above technical solution, the bearing plate on the connecting rod structure always faces upward when the rotating rod rotates, and the end of the rotating rod is connected to the counterweight block by the cable structure, effectively reducing the difficulty of lowering or lifting the rotating rod, and making the lifting ladder easier to use.

[0008] The present utility model is further configured such that one end of the top of the frame near the rotating shafts of the first rotating rod and the second rotating rod is fixedly connected with a bearing plate, and the bearing plate fixedly connected to the top of the frame is not connected to the first connecting rod and the second connecting rod.

[0009] By adopting the above technical solution, the user can use it stably.

[0010] The present utility model is further configured such that when multiple bearing plates are in the same plane, the bearing plates are arranged at equal intervals.

[0011] By adopting the above technical solution, after the first rotating rod and the second rotating rod are rotated downward for adjustment, the intervals between multiple bearing plates can also remain equal.

[0012] The present utility model is further configured such that downward limiting frames are fixedly connected to both sides of the top of the frame at one end far from the rotating shaft of the first rotating rod, and a limiting column for restricting the downward rotation of the first rotating rod passes through between the limiting frames.

[0013] By adopting the above technical solution, the limiting column between the limiting frames can play a limiting role on the first rotating rod to prevent it from rotating uncontrollably.

[0014] The present utility model is further configured such that when the top surface of the limiting column contacts the first rotating rod and the bottom surface contacts the limiting frame, multiple bearing plates are in the same plane.

[0015] By adopting the above technical solution, in the initial state of the first rotating rod, multiple bearing plates are kept in the same plane, which is convenient for placing a horizontally placed cover plate on the top of the frame structure.

[0016] The present utility model is further configured such that guiding structures for cooperating with the frame are provided at both ends of the counterweight block.

[0017] By adopting the above technical solution, the counterweight block can slide vertically up and down under the action of the guiding structure.

[0018] The present utility model is further configured such that the lower end of the frame is below the ground, and the second rotating rod can rest on the ground after rotating downward.

[0019] By adopting the above technical solution, the user can easily climb onto the top of the frame along the bearing plate.

[0020] In summary, the present utility model mainly has the following beneficial effects:

[0021] By rotatably arranging two sets of rotating rod structures at the top of the frame and connecting a triangular connecting rod structure between the two sets of rotating rod structures, the bearing plate on the connecting rod structure always faces upward when the rotating rod rotates, and a cable structure is used to connect the end of the rotating rod and the counterweight, effectively reducing the difficulty of lowering or lifting the rotating rod, and making the lifting ladder easier to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional view of the present utility model;

[0023] Figure 2 is of the present utility model Figure 1 an enlarged view of A in;

[0024] Figure 3 is another three-dimensional view of the present utility model from a different perspective;

[0025] Figure 4 is of the present utility model Figure 3 an enlarged view of B in;

[0026] Figure 5 is a three-dimensional view of the present utility model in the unfolded state.

[0027] In the figure: 1, frame; 2, first rotating rod; 3, second rotating rod; 4, connecting shaft; 5, first connecting rod; 6, second connecting rod; 7, bearing plate; 8, fixed platform; 9, guide shaft; 10, counterweight; 11, cable; 12, limit frame; 13, limit post. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0029] The embodiments of the present utility model will be described below according to its overall structure.

[0030] Embodiment 1

[0031] A flexible adjustable lifting ladder, as Figures 1 - 5As shown in the figure, it includes a frame 1. At the top of the frame 1, a pair of first rotating rods 2 and a pair of second rotating rods 3 are arranged at intervals in the height direction. Along the length direction of the top surfaces of the first rotating rods 2 and the second rotating rods 3, connecting shafts 4 are connected at intervals. Between the two connecting shafts 4 corresponding to each other in the height direction of the first rotating rods 2 and the second rotating rods 3, a first connecting rod 5 that maintains a vertical state is rotatably connected at the same time. Specifically, the first connecting rod 5 also remains vertical when the first rotating rods 2 and the second rotating rods 3 rotate. One side of the top of the first connecting rod 5 is fixedly connected to a bearing plate 7. On the other side of the bearing plate 7, an inclined second connecting rod 6 is fixedly connected. The end of the second connecting rod 6 away from the bearing plate 7 is rotatably connected to the connecting shaft 4 of the second rotating rod 3.

[0032] Please refer to Figures 1 - 5 , at the end of the first rotating rod 2 away from its own rotating shaft, a fixed platform 8 is fixedly connected. At the end of the frame 1 away from the fixed platform 8, a counterweight 10 is slidably connected in the vertical direction. The counterweight 10 and the fixed platform 8 are connected by a cable 11. A plurality of guide shafts 9 are connected to the top of the frame 1. Specifically, the guide shafts 9 are respectively arranged on both sides of the top of the frame 1. The guide shafts 9 are rotatably connected to the top of the frame 1. The cable 11 bypasses the guide shafts and connects the counterweight 10 and the fixed platform 8. Specifically, there are two cables 11 in total. One ends of the two cables are fixedly connected to the counterweight 10, then go up around one of the guide shafts 9 to the other guide shaft 9, and finally extend downward to connect the fixed platform 8.

[0033] Please refer to Figures 1 - 4 , at one end of the top of the frame 1 near the rotating shafts of the first rotating rod 2 and the second rotating rod 3, a bearing plate 7 is fixedly connected. The bearing plate 7 fixedly connected to the top of the frame 1 is not connected to the first connecting rod 5 and the second connecting rod 6. A bearing plate 7 that will not descend is fixedly connected to the top of the frame 1. After the first rotating rod 2 and the second rotating rod 3 rotate downward, each bearing plate 7 serves as a step and is located at different heights, and the intervals in the height direction are equal to each other, enabling the user to use it stably. When multiple bearing plates 7 are in the same plane state, the bearing plates 7 are arranged at equal intervals. After the first rotating rod 2 and the second rotating rod 3 are rotated downward for adjustment, the intervals between the multiple bearing plates 7 can also remain equal.

[0034] Please refer to Figures 3 - 5, when the top surface of the limit post 13 contacts the first rotating rod 2 and the bottom surface contacts the limit frame 12, multiple bearing plates 7 are in the same plane. In the initial state of the first rotating rod 2, multiple bearing plates 7 are kept in the same plane, which is convenient for placing a cover plate in a horizontal state at the top of the frame 1 structure. Both ends of the counterweight 10 are provided with a guiding structure for cooperating with the frame 1, so that the counterweight 10 can slide vertically up and down under the action of the guiding structure. The lower end of the frame 1 is located below the ground. After the second rotating rod 3 rotates downward, it can rest on the ground, preventing the first rotating rod 2 and the second rotating rod 3 from not being able to contact the ground after rotation, enabling the user to easily climb to the top of the frame 1 along the bearing plate 7.

[0035] Embodiment 2

[0036] A flexible adjustable lifting ladder, as Figures 1 - 5 shown. Based on Embodiment 1, the difference from Embodiment 1 is that at both sides of the top of the frame 1, a downward limit frame 12 is fixedly connected to the end of the rotating shaft away from the first rotating rod 2. A limit post 13 for restricting the downward rotation of the first rotating rod 2 passes through between the limit frames 12. The limit post 13 between the limit frames 12 can play a limiting role on the first rotating rod 2 to prevent it from rotating uncontrollably. When the first rotating rod 2 is restricted from rotating, due to the restriction of the first connecting rod 5 and the second connecting rod 6 connected between the first rotating rod 2 and the second rotating rod 3, the second rotating rod 3 is also restricted from rotating downward. Specifically, the first rotating rod 2 rests on the limit post 13 under its own gravity, enabling the limit post 13 to realize the rotational restriction on the first rotating rod 2.

[0037] The working principle of the present utility model is as follows: After pulling out the limit post 13, press down the end of the first rotating rod 2 or the second rotating rod 3. Since the fixed platform 8 is connected to the counterweight 10 through the cable 11, the counterweight 10 rises while the first rotating rod 2 and the second rotating rod 3 rotate downward. The self-gravity of the counterweight 10 offsets part of the gravity of the first rotating rod 2 and the second rotating rod 3, thereby enabling the first rotating rod 2 and the second rotating rod 3 to rotate downward smoothly and also being able to be easily lifted, effectively reducing the difficulty of unfolding and retracting the lifting ladder.

[0038] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present utility model, make modifications, substitutions and variations that do not contribute creatively to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A flexibly adjustable lifting ladder, comprising a frame (1), characterized in that: A pair of first rotating rods (2) and a pair of second rotating rods (3) are arranged at intervals at the top of the frame (1) in the height direction; the top surfaces of the first rotating rods (2) and the second rotating rods (3) are connected with connecting shafts (4) at intervals in the length direction; a first connecting rod (5) maintained in a vertical state is simultaneously rotatably connected between two corresponding connecting shafts (4) of the first rotating rod (2) and the second rotating rod (3) in the height direction; the top of the first connecting rod (5) is fixedly connected to one side of a bearing plate (7); the other side of the bearing plate (7) is fixedly connected to an inclined second connecting rod (6), the end of the second connecting rod (6) away from the supporting plate (7) is rotatably connected to the connecting shaft (4) of the second rotating rod (3), the end of the first rotating rod (2) away from its own rotating shaft is fixedly connected to a fixed platform (8), the end of the frame (1) away from the fixed platform (8) is slidably connected to a counterweight block (10) in a vertical direction, the counterweight block (10) and the fixed platform (8) are connected by a cable (11), and the top of the frame (1) is connected to a plurality of guide shafts (9), and the cable (11) bypasses the guide shafts to connect the counterweight block (10) and the fixed platform (8).

2. The flexibly adjustable lifting ladder according to claim 1, characterized in that: A bearing plate (7) is fixedly connected to one end of the top of the frame (1) close to the rotation axis of the first rotating rod (2) and the second rotating rod (3); the bearing plate (7) fixedly connected to the top of the frame (1) is not connected to the first connecting rod (5) and the second connecting rod (6).

3. The flexibly adjustable lifting ladder according to claim 2, characterized in that: When the plurality of bearing plates (7) are in a state of being in the same plane, the bearing plates (7) are arranged at equal intervals.

4. The flexibly adjustable lifting ladder according to claim 1, characterized in that: A downward limiting frame (12) is fixedly connected to both sides of the top of the frame (1) at one end of the rotating shaft away from the first rotating rod (2), and a limiting column (13) for limiting the downward rotation of the first rotating rod (2) passes through the limiting frames (12).

5. The flexibly adjustable lifting ladder according to claim 4, characterized in that: When the top surface of the limiting column (13) contacts the first rotating rod (2) and the bottom surface contacts the limiting frame (12), the plurality of supporting plates (7) are located in the same plane.

6. The flexibly adjustable lifting ladder according to claim 1, characterized in that: Both ends of the counterweight block (10) are provided with guide structures for matching with the frame (1).

7. The flexibly adjustable lifting ladder according to claim 1, characterized in that: The lower end of the frame (1) is located below the ground, and the second rotating rod (3) can rest on the ground after rotating downward.

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