Portable insulating ladder for electric power construction
By employing a lateral retraction design and a self-locking structure for the sliding rod and support rod, the problem of large space occupation after storage of traditional portable insulated ladders is solved, achieving efficient storage and stable locking of portable insulated ladders, thus improving portability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING YUNFENG ELECTRIC POWER CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional portable insulated ladders can only be retracted vertically, resulting in a large vertical space occupied when folded, increasing the difficulty of carrying them by a single person and affecting mobility.
The ladder employs a lateral retraction design for the sliding rod and support rod. The lateral retraction of the sliding rod is achieved using the first lever and the first locking block, and a self-locking structure is formed by the elastic force of the first spring. Combined with the sliding connection of the support leg and the sliding column, the ladder is securely locked.
Significantly reduces storage volume, minimizes transportation and storage space requirements, avoids the risk of loose connections due to human error, and enhances portability and security.
Smart Images

Figure CN224496331U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of portable insulated ladders for power construction, specifically a portable insulated ladder for power construction. Background Technology
[0002] The benefits of portable ladders are evident in numerous practical scenarios, playing a significant role in everyday household use, outdoor work, and construction projects. First, their ultimate portability is a core advantage. The lightweight design allows for easy carrying by a single person, and their size is significantly reduced when folded or extended, fitting easily into a car trunk, storage room, or even a backpack. This saves space and facilitates flexible movement between different locations, making them particularly suitable for scenarios requiring frequent relocation. Second, they are versatile and adaptable. The adjustable height design accommodates various needs, from changing light bulbs and cleaning high places at home to setting up camp outdoors and temporary access points for construction projects, eliminating the need for multiple ladders at different heights. Furthermore, safety is guaranteed. Most products are equipped with non-slip feet and footrests, ensuring stability and safe use on various surfaces such as tiles and grass, preventing the risk of slipping. Finally, they are widely applicable. Whether for routine household maintenance, renovations, outdoor adventures, or electrical repairs, portable ladders can be quickly deployed and put into use, greatly improving work efficiency. They are tools that combine practicality and convenience.
[0003] Traditional portable insulated ladders can only be retracted vertically. This retractable structure means that even when folded up, they still occupy vertical space, increasing the difficulty of carrying them by a single person and affecting mobility. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a portable insulated ladder for power construction, which solves the problem that traditional portable insulated ladders can only be retracted vertically.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable insulated ladder for power construction, comprising two support rods, each support rod having a sliding rod slidably connected inside, each support rod having a mounting frame installed on its bottom surface, each mounting frame having a protective shell installed inside, each protective shell having a first spring installed inside, each first spring having a first locking block connected to its end away from the mounting frame, each first locking block having its outer surface engaging with the inside of the sliding rod, each protective shell having a first through groove inside, each first through groove having a first lever slidably connected inside, each first lever having its end near the first spring connecting with the outer surface of the first locking block, and each support rod having a baffle installed inside.
[0006] Furthermore, one set of support rods and slide rods has support legs connected to their opposite sides, while the other set of support rods and slide rods has sliding columns connected to their opposite sides. Each sliding column is slidably connected inside the support leg, and each sliding column is slidably connected to a connecting column inside.
[0007] Furthermore, each of the support rods has a baffle installed inside, and a second spring is connected to the outer surface of each baffle.
[0008] Furthermore, each of the second springs is connected to a second locking block at the end away from the baffle, wherein the outer surface of one of the second locking blocks engages with the outer surface of the sliding post, and the outer surface of the other second locking block engages with the outer surface of the connecting post.
[0009] Furthermore, each of the support rods has a second through groove on its upper surface, a sliding groove is installed on the upper surface of each support rod, a sliding block is slidably connected inside each sliding groove, a connecting rod is connected to the outer surface of each second locking block, the outer surface of each connecting rod is connected to the bottom surface of the sliding block, and a second paddle is installed on the upper surface of each sliding block.
[0010] Furthermore, each of the supporting legs is connected to a rotating shaft on its bottom surface, a bearing frame is rotatably connected to the outer surface of each rotating shaft, and a rubber pad is connected to the bottom surface of each bearing frame.
[0011] Furthermore, a top plate is installed at the top of both connecting columns, and a storage box and a hook are respectively installed on the outer surface of the top plate.
[0012] Compared with the prior art, this utility model provides a portable insulated ladder for power construction, which has the following advantages:
[0013] This invention enables the slide rod to retract laterally into the support rod by moving the first locking block through the first lever. Compared with the traditional longitudinal retraction method, it can significantly reduce the overall volume after storage, making it especially suitable for storage in the narrow trunk of engineering vehicles, corners of power distribution rooms, and other spaces, reducing space occupation during transportation and storage. With the help of the elastic force of the first spring, when the ladder is unfolded, it can drive the first locking block to automatically engage with the slide rod, forming a stable locking structure. This locking design not only eliminates the tedious steps of manual fixing, but also avoids the risk of loosening due to human error. Attached Figure Description
[0014] Figure 1 This is a front view of the present invention;
[0015] Figure 2 This is a schematic diagram of the internal structure of the support rod in this utility model;
[0016] Figure 3 This is a schematic diagram of the internal structure of the protective shell in this utility model;
[0017] Figure 4 This is a schematic diagram of the second card block structure in this utility model;
[0018] Figure 5 This is a schematic diagram of the support frame in this utility model.
[0019] In the diagram: 1. Support rod; 2. Sliding rod; 3. Mounting bracket; 4. Protective shell; 5. First spring; 6. First locking block; 7. First through groove; 8. First lever; 9. Baffle; 10. Support leg; 11. Sliding column; 12. Baffle; 13. Second spring; 14. Second locking block; 15. Second through groove; 16. Connecting rod; 17. Sliding groove; 18. Sliding block; 19. Second lever; 20. Bearing frame; 21. Rotating shaft; 22. Rubber base pad; 23. Connecting column; 24. Top plate; 25. Storage box; 26. Hook. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1 to 5 This embodiment of a portable insulated ladder for power construction includes two support rods 1. Each support rod 1 has a sliding rod 2 slidably connected inside. Each support rod 1 has a mounting frame 3 installed on its bottom surface. Each mounting frame 3 has a protective shell 4 installed inside. Each protective shell 4 has a first spring 5 installed inside. Each first spring 5 has a first locking block 6 connected to its end away from the mounting frame 3. The outer surface of each first locking block 6 is engaged with the inside of the sliding rod 2. Each protective shell 4 has a first through groove 7 inside. Each first through groove 7 has a first lever 8 slidably connected inside. The end of each first lever 8 near the first spring 5 is connected to the outer surface of the first locking block 6. A baffle 9 is installed inside the support rod 1.
[0022] In this system, one set of support rods 1 and slide rods 2 are connected to support legs 10 on their opposite sides, while the other set of support rods 1 and slide rods 2 are connected to sliding columns 11 on their opposite sides. Each sliding column 11 is slidably connected inside the support leg 10, and each sliding column 11 is slidably connected to a connecting column 23. Each support rod 1 has a baffle 12 installed inside, and each baffle 12 has a second spring 13 connected to its outer surface. When the ladder height needs to be fixed, the baffle 12 inside the support rod 1 provides support for the second spring 13. The second spring 13 extends and pushes the second locking block 14, so that one of the second locking blocks 14 engages with the outer surface of the sliding column 11, and the other second locking block 14 engages with the outer surface of the connecting column 23, forming a locking structure. This fixes the relative positions of the sliding column 11 and the support leg 10, and the connecting column 23 and the sliding column 11, thus achieving a stable locking of the ladder height.
[0023] Each second spring 13 has a second locking block 14 connected to the end away from the baffle 12. The outer surface of one second locking block 14 engages with the outer surface of the sliding post 11, and the outer surface of the other second locking block 14 engages with the outer surface of the connecting post 23.
[0024] Each support rod 1 has a second through groove 15 on its upper surface, and a sliding groove 17 is installed on its upper surface. A sliding block 18 is slidably connected inside each sliding groove 17. A connecting rod 16 is connected to the outer surface of each second locking block 14, and the outer surface of each connecting rod 16 is connected to the bottom surface of the sliding block 18. A second lever 19 is installed on the upper surface of each sliding block 18. To retract the ladder, the sliding block 18 inside the sliding groove 17 on the upper surface of the support rod 1 is moved. The sliding block 18 drives the second lever 19 to move, and the connecting rod 16 connected to the bottom surface of the sliding block 18 moves accordingly. This, in turn, pulls the second locking block 14 to compress the second spring 13, causing the second locking block 14 to disengage from the sliding column 11 and the connecting column 23. At this time, the sliding column 11 can slide and retract inside the support leg 10, and the connecting column 23 can slide and retract inside the sliding column 11, achieving overall ladder retraction.
[0025] Each support leg 10 has a rotating shaft 21 connected to its bottom surface. Each rotating shaft 21 has a support frame 20 rotatably connected to its outer surface. Each support frame 20 has a rubber pad 22 connected to its bottom surface. The top of the two connecting columns 23 is jointly mounted on a top plate 24. The outer surface of the top plate 24 is respectively equipped with a storage box 25 and a hook 26. The rotating shaft 21 on the bottom surface of the support leg 10 allows the support frame 20 to rotate and adjust its angle. The rubber pad 22 enhances the stability on different ground surfaces and provides insulation to the bottom surface. The storage box 25 can store tools, and the hook 26 is convenient for hanging items, improving the convenience of operation.
[0026] The working principle of the above embodiments is as follows:
[0027] When the ladder needs to be extended, pull the slide bar 2 outward, allowing it to slide along the inside of the support rod 1. At this time, the first spring 5 inside the protective shell 4 naturally extends due to the loss of compression from the slide bar 2, pushing the first locking block 6 outward until it engages with the slot inside the slide bar 2, forming a locking structure. This ensures that the slide bar 2 and the support rod 1 are relatively fixed, providing stable support for the operation. If the ladder needs to be retracted, move the first lever 8 in the first through slot 7 to move the first locking block 6 into the protective shell 4. At this time, the first spring 5 is compressed. After the first locking block 6 disengages from the slot of the slide bar 2, the slide bar 2 can slide freely into the support rod 1, achieving lateral retraction. During this process, the baffle 9 inside the support rod 1 limits the retraction stroke of the slide bar 2, preventing excessive retraction that could cause component collision damage and ensuring the structural integrity of the ladder.
[0028] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.
Claims
1. A portable insulated ladder for power construction, characterized in that: It includes two support rods (1), each of which is slidably connected to a slide rod (2). Each support rod (1) has a mounting bracket (3) installed on its bottom surface. Each mounting bracket (3) has a protective shell (4) installed inside. Each protective shell (4) has a first spring (5) installed inside. Each first spring (5) has a first locking block (6) connected to the end away from the mounting bracket (3). The outer surface of each first locking block (6) is engaged with the inside of the slide rod (2). Each protective shell (4) has a first through groove (7) inside. Each first through groove (7) has a first paddle (8) slidably connected inside. The end of each first paddle (8) near the first spring (5) is connected to the outer surface of the first locking block (6). A baffle (9) is installed inside the support rod (1).
2. The portable insulated ladder for power construction according to claim 1, characterized in that: One set of support rods (1) and slide rods (2) are connected to support legs (10) on the side away from each other, and the other set of support rods (1) and slide rods (2) are connected to sliding columns (11) on the side away from each other. Each sliding column (11) is slidably connected inside the support leg (10), and each sliding column (11) is slidably connected to a connecting column (23).
3. The portable insulated ladder for power construction according to claim 1, characterized in that: Each of the support rods (1) has a baffle (12) installed inside, and a second spring (13) is connected to the outer surface of each baffle (12).
4. A portable insulated ladder for power construction according to claim 3, characterized in that: Each of the second springs (13) is connected to a second locking block (14) at the end away from the baffle (12). The outer surface of one of the second locking blocks (14) engages with the outer surface of the sliding post (11), and the outer surface of the other second locking block (14) engages with the outer surface of the connecting post (23).
5. A portable insulated ladder for power construction according to claim 4, characterized in that: Each of the support rods (1) has a second through groove (15) on its upper surface, and each of the support rods (1) has a sliding groove (17) installed on its upper surface. Each of the sliding grooves (17) has a sliding block (18) slidably connected inside it. Each of the second locking blocks (14) has a connecting rod (16) connected to its outer surface. Each of the connecting rods (16) has its outer surface connected to the bottom surface of the sliding block (18). Each of the sliding blocks (18) has a second paddle (19) installed on its upper surface.
6. A portable insulated ladder for power construction according to claim 2, characterized in that: Each of the support legs (10) has a rotating shaft (21) connected to its bottom surface, and a bearing frame (20) is rotatably connected to the outer surface of each of the rotating shafts (21). A rubber pad (22) is connected to the bottom surface of each of the bearing frames (20).
7. A portable insulated ladder for power construction according to claim 4, characterized in that: The top of the two connecting columns (23) is jointly fitted with a top plate (24), and the outer surface of the top plate (24) is fitted with a storage box (25) and a hook (26).