Telescopic aluminum alloy ladder stand for elevator

Abstract

The utility model discloses a telescopic aluminum alloy ladder stand for an elevator, which relates to the technical field of elevator equipment and comprises a bottom pit, two symmetrical support columns are mounted on the inner bottom wall of the bottom pit, and a plurality of uniformly distributed pedals are fixedly connected to the opposite sides of the support columns; a telescopic assembly used for adjusting the height of the crawling ladder is arranged in the supporting column and comprises a double-shaft motor fixedly installed at the bottom of the pedal, and the two driving ends of the double-shaft motor are both fixedly connected with rotating shafts. According to the telescopic aluminum alloy ladder stand for the elevator, two telescopic rods, a plurality of pedals and two handles can be driven to move upwards by starting a double-shaft motor under the cooperation of a rotating shaft, a driving bevel gear, a driven bevel gear, a lead screw and a moving block, and it is ensured that when a maintainer climbs to a high position, the maintainer can assist in maintaining body balance by grabbing the handles at any time; therefore, the risk of falling from the crawling ladder is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, specifically a retractable aluminum alloy ladder for elevators. Background Technology

[0002] During elevator installation, installers need to enter the elevator pit and climb ladders to reach the assembly position to assemble and test the various components. Aluminum alloy ladders are lightweight yet have good strength, providing a reliable climbing path for installers to operate and ensuring the elevator is installed accurately. During elevator maintenance, equipment at different heights needs to be maintained. However, non-retractable ladders cannot quickly reach the appropriate height for maintenance, thus prolonging the elevator repair and maintenance time and affecting the elevator's ability to return to normal operation as soon as possible.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent application with application number CN202320429386.2 and application date of 2023-03-03) of the elevator pit ladder has a second ladder body that can be retractably installed on the first ladder body, so that the ladder can switch states according to the needs of use. This can reduce the height of the ladder when it is not in use, so that the elevator pit ladder can be placed on the lower side of the hall sill of the pit shaft, thereby reducing the impact on the size of the pit shaft and meeting the usage needs of the pit shaft.

[0004] Although existing technology allows for the extension and retraction of ladders, when using them for work at heights, maintenance personnel can hardly maintain their balance by simply stepping on the footplates. If their center of gravity shifts or they are subjected to a slight external impact, their body may sway and lose balance, increasing the risk of falling from the ladder and posing a serious threat to their lives. Utility Model Content

[0005] The purpose of this utility model is to provide a retractable aluminum alloy ladder for elevators, in order to solve the problem mentioned in the background art that maintenance personnel have difficulty maintaining their balance by only stepping on the pedals with their feet, which increases the risk of falling from the ladder.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a retractable aluminum alloy ladder for elevators, comprising a pit, with two symmetrical support columns installed on the inner bottom wall of the pit, and multiple evenly distributed steps fixedly connected to one side of the support columns; the support columns are internally provided with a telescopic assembly for adjusting the ladder height, the telescopic assembly including a dual-axis motor fixedly installed at the bottom of the steps, and both drive ends of the dual-axis motor are fixedly connected to a rotating shaft, the end of the rotating shaft away from the dual-axis motor being fixedly connected to a driving bevel gear, a lead screw being rotatably connected internally to the support column, the end of the lead screw near the driving bevel gear being fixedly connected to a driven bevel gear, and the driving bevel gear and the driven bevel gear being meshed; a moving block is threadedly connected to the outer wall of the lead screw, a telescopic rod is fixedly connected to the top of the moving block, and multiple evenly distributed steps are fixedly connected to one side of the telescopic rod, a fixing plate is fixedly connected to one side of the telescopic rod, and the side wall of the fixing plate is fixedly connected to the side wall of the steps; the bottom of the support column is provided with an adjustment assembly for adjusting the ladder angle.

[0007] Furthermore, the adjustment assembly includes two slide rails 1 fixedly connected to the bottom wall of the pit, a slider 1 slidably connected to the inner wall of the slide rail 1, the top of the slider 1 being hinged to the bottom of the support column, a bolt being provided on the side wall of the slide rail 1, and a nut being threaded to one end of the bolt. Two slide rails 2 are fixedly connected to the side wall of the pit, and a slider 2 is slidably connected to the inner wall of the slide rail 2. A connecting block is fixedly connected to the side of the fixed plate away from the telescopic rod, and the connecting block is hinged to the opposite side of the slider 2.

[0008] Furthermore, the support column has a sliding cavity inside, and the moving block and the outer wall of the telescopic rod are slidably connected inside the sliding cavity. The telescopic rod has a through groove inside, and the outer wall of the lead screw is movably connected to the inner wall of the through groove.

[0009] Furthermore, a handle is fixedly connected to the side wall of the telescopic rod, and a groove communicating with the sliding cavity is opened on the side wall of the support column, with the outer wall of the handle slidably connected to the inside of the groove.

[0010] Furthermore, the side wall of the support column is provided with a limiting groove that communicates with the sliding cavity, and the outer wall of the fixing plate is slidably connected inside the limiting groove.

[0011] Furthermore, multiple evenly distributed threaded holes are provided on both sides of the slide rail, one end of the bolt passes through the threaded hole and connects to the slide rail, and the protruding end of the bolt is threadedly connected to the nut.

[0012] Furthermore, an anti-slip pad is fixedly connected to the top of the pedal, and an anti-slip sleeve is fixedly connected to the outer wall of the handle, both the anti-slip pad and the anti-slip sleeve being made of rubber.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The elevator uses a retractable aluminum alloy ladder. By starting the dual-axis motor, in cooperation with the moving block, the two telescopic rods and two handles can be controlled to move upward. This allows the ladder height to be adjusted, and maintenance personnel can hold the handles to maintain their balance when climbing to a higher position, thereby greatly reducing the risk of falling from the ladder.

[0015] (2) The elevator uses a retractable aluminum alloy ladder. By rotating the bolt, the ladder can be released from its fixed position. At this time, by moving the support column, the ladder can be adjusted to the required angle. Then, the bolt is passed through the threaded hole and the slider, and finally fixed with the nut. This ensures a more ideal climbing path when inspecting different height positions, protects the safety of maintenance personnel, and can be placed vertically when not in use, saving the space of the internal pit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the support column and the pedal of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the support column and telescopic rod of this utility model;

[0018] Figure 3 This is a schematic diagram of the moving block and lead screw of this utility model;

[0019] Figure 4 This is a schematic diagram of the telescopic rod and lead screw of this utility model;

[0020] Figure 5 This is an exploded structural diagram of the slide rail of this utility model;

[0021] Figure 6 This is an exploded structural diagram of the slide rail 2 of this utility model.

[0022] In the diagram: 1. Pit; 2. Support column; 3. Pedal; 4. Telescopic rod; 5. Handle; 6. Slide rail one; 7. Slide rail two; 8. Slide groove; 9. Fixing plate; 10. Rotating shaft; 11. Driving bevel gear; 12. Driven bevel gear; 13. Lead screw; 14. Slide cavity; 15. Moving block; 16. Anti-slip pad; 17. Through groove; 18. Slider one; 19. Bolt; 20. Nut; 21. Threaded hole; 22. Slider two; 23. Connecting block. Detailed Implementation

[0023] 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.

[0024] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solution: a retractable aluminum alloy ladder for elevators, including a pit 1, two symmetrical support columns 2 installed on the inner bottom wall of the pit 1, and multiple evenly distributed treads 3 fixedly connected to one side of the support columns 2 facing each other.

[0025] When installing or repairing the elevator, it is necessary to enter the pit 1 for operation. Two support columns 2 and multiple evenly distributed steps 3 can form a ladder. The steps 3 are made of aluminum alloy, which not only has sufficient strength, but also has good corrosion resistance, and can resist external moisture and corrosive substances, thereby preventing the steps 3 from rusting or being corroded.

[0026] Example 2:

[0027] Based on Embodiment 1, by setting a telescopic component, the height of the ladder can be adjusted, and the user can also use the handle 5 to help maintain body balance. Its specific structure is as follows:

[0028] The support column 2 is internally equipped with a telescopic assembly for adjusting the height of the ladder. The telescopic assembly includes a dual-axis motor fixedly mounted at the bottom of the footboard 3, with two drive ends of the dual-axis motor fixedly connected to rotating shafts 10. A driving bevel gear 11 is fixedly connected to the end of the rotating shaft 10 furthest from the dual-axis motor. A lead screw 13 is rotatably connected internally to the support column 2. A driven bevel gear 12 is fixedly connected to the end of the lead screw 13 near the driving bevel gear 11, and the driving bevel gear 11 and driven bevel gear 12 are meshed together. A moving block 15 is threaded onto the outer wall of the lead screw 13. A telescopic rod 4 is fixedly connected to the top of the moving block 15, and multiple evenly distributed footboards 3 are fixedly connected to one side of the telescopic rod 4. A fixing plate 9 is fixedly connected to one side of the telescopic rod 4. The side wall of plate 9 is fixedly connected to the side wall of pedal 3; a sliding cavity 14 is provided inside the support column 2, and the moving block 15 and the outer wall of telescopic rod 4 are slidably connected inside the sliding cavity 14; a through groove 17 is provided inside the telescopic rod 4, and the outer wall of screw rod 13 is movably connected to the inner wall of through groove 17; a handle 5 is fixedly connected to the side wall of telescopic rod 4; a sliding groove 8 communicating with the sliding cavity 14 is provided on the side wall of support column 2, and the outer wall of handle 5 is slidably connected inside the sliding groove 8; a limiting groove communicating with the sliding cavity 14 is provided on the side wall of support column 2, and the outer wall of fixing plate 9 is slidably connected inside the limiting groove; an anti-slip pad 16 is fixedly connected to the top of pedal 3, and an anti-slip sleeve is fixedly connected to the outer wall of handle 5, and both the anti-slip pad 16 and the anti-slip sleeve are made of rubber.

[0029] When performing maintenance at a higher position and requiring the ladder to be extended or retracted, the dual-axis motor is activated. Its drive end drives two rotating shafts 10 to rotate simultaneously. Through the active bevel gear 11 and the driven bevel gear 12, the two lead screws 13 rotate. At this time, the two moving blocks 15 move upward under the action of the sliding cavity 14, which in turn drives the two telescopic rods 4 and multiple pedals 3 to move upward. After reaching the designated position and completing the extension or retraction, the dual-axis motor stops working. The dual-axis motor locks the position of the two moving blocks 15 through its own brake self-locking mechanism and the action of the threads on the outer wall of the two lead screws 3, preventing the two telescopic rods 4 from sliding down when the operator is climbing. At the same time, the two handles 5 also move upward with the telescopic rods 4, ensuring that the operator can maintain balance by gripping the handles 5 when climbing, preventing the body from swaying and causing imbalance, which could lead to a fall from the ladder. By setting rubber anti-slip pads 16 and anti-slip sleeves on the pedals 3 and handles 5, the friction between the operator and the pedals 3 and handles 5 can be increased, preventing accidents such as falls due to slipping.

[0030] Example 3:

[0031] Based on Embodiment 2, by setting an adjustment component, a more ideal climbing path can be ensured when performing maintenance at different height positions. The specific structure is as follows: The bottom of the support column 2 is provided with an adjustment component for adjusting the climbing angle. The adjustment component includes two slide rails 6 fixedly connected to the bottom wall of the pit 1. A slider 18 is slidably connected to the inner wall of the slide rail 6. The top of the slider 18 is hinged to the bottom of the support column 2. A bolt 19 is provided on the side wall of the slide rail 6, and a nut 20 is threadedly connected to one end of the bolt 19. Two slide rails 7 are fixedly connected to the side wall of the pit 1. A slider 22 is slidably connected to the inner wall of the slide rail 7. A connecting block 23 is fixedly connected to the side of the fixing plate 9 away from the telescopic rod 4, and the connecting block 23 is hinged to the opposite side of the slider 22. Multiple evenly distributed threaded holes 21 are opened through both sides of the slide rail 6. One end of the bolt 19 passes through the threaded hole 21 and the slider 18, and the protruding end of the bolt 19 is threadedly connected to the nut 20.

[0032] When the ladder angle needs to be adjusted, the two bolts 19 are turned to release the ladder from its fixation. Then, the two support columns 2 are moved, which will cause the two sliders 18 to slide within the two slide rails 6. At the same time, the position of the telescopic rod 4 will change, and through the fixing plate 9 and the connecting block 23, the slider 22 will slide within the slide rail 7. After the ladder angle is adjusted, one end of the two bolts 19 is passed through the corresponding threaded hole 21 and the slider 18, and the passed end is fixed with the nut 20, thereby fixing the ladder and preventing displacement during climbing, ensuring a more ideal climbing path. When the ladder is not in use, it can be placed vertically to save space in the pit 1 and avoid conflict with other equipment and tools in the vicinity.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A retractable aluminum alloy ladder for elevators, comprising a pit (1), wherein two symmetrical support columns (2) are installed on the inner bottom wall of the pit (1), and multiple evenly distributed treads (3) are fixedly connected to the opposite side of the support columns (2); Its features are: The support column (2) is internally equipped with a telescopic assembly for adjusting the height of the ladder. The telescopic assembly includes a dual-axis motor fixedly installed at the bottom of the footboard (3), and both drive ends of the dual-axis motor are fixedly connected to a rotating shaft (10). The end of the rotating shaft (10) away from the dual-axis motor is fixedly connected to a driving bevel gear (11). A lead screw (13) is rotatably connected inside the support column (2). The end of the lead screw (13) near the driving bevel gear (11) is fixedly connected to a driven bevel gear (12), and the driving bevel gear... The bevel gear (11) meshes with the driven bevel gear (12). The outer wall of the lead screw (13) is threaded with a moving block (15). The top of the moving block (15) is fixedly connected with a telescopic rod (4). A plurality of evenly distributed pedals (3) are fixedly connected to one side of the telescopic rod (4). A fixing plate (9) is fixedly connected to one side of the telescopic rod (4). The side wall of the fixing plate (9) is fixedly connected to the side wall of the pedal (3). The bottom of the support column (2) is provided with an adjustment component for adjusting the ladder angle.

2. The retractable aluminum alloy ladder for elevators according to claim 1, characterized in that: The adjustment assembly includes two slide rails (6) fixedly connected to the bottom wall of the pit (1). A slider (18) is slidably connected to the inner wall of the slide rail (6). The top of the slider (18) is hinged to the bottom of the support column (2). A bolt (19) is provided on the side wall of the slide rail (6), and a nut (20) is threaded to one end of the bolt (19). Two slide rails (7) are fixedly connected to the side wall of the pit (1). A slider (22) is slidably connected to the inner wall of the slide rail (7). A connecting block (23) is fixedly connected to the side of the fixed plate (9) away from the telescopic rod (4), and the connecting block (23) is hinged to the opposite side of the slider (22).

3. The retractable aluminum alloy ladder for elevators according to claim 1, characterized in that: The support column (2) has a sliding cavity (14) inside, and the moving block (15) and the outer wall of the telescopic rod (4) are slidably connected inside the sliding cavity (14). The telescopic rod (4) has a through groove (17) inside, and the outer wall of the lead screw (13) is movably connected to the inner wall of the through groove (17).

4. The retractable aluminum alloy ladder for elevators according to claim 1, characterized in that: The side wall of the telescopic rod (4) is fixedly connected to a handle (5), and the side wall of the support column (2) is provided with a groove (8) that communicates with the sliding cavity (14), and the outer wall of the handle (5) is slidably connected to the inside of the groove (8).

5. The retractable aluminum alloy ladder for elevators according to claim 1, characterized in that: The side wall of the support column (2) is provided with a limiting groove that communicates with the sliding cavity (14), and the outer wall of the fixing plate (9) is slidably connected inside the limiting groove.

6. A retractable aluminum alloy ladder for elevators according to claim 2, characterized in that: The slide rail (6) has multiple evenly distributed threaded holes (21) on both sides. One end of the bolt (19) passes through the threaded hole (21) and the slider (18), and the protruding end of the bolt (19) is threadedly connected to the nut (20).

7. A retractable aluminum alloy ladder for elevators according to claim 4, characterized in that: The top of the pedal (3) is fixedly connected to an anti-slip pad (16), and the outer wall of the handle (5) is fixedly connected to an anti-slip sleeve. Both the anti-slip pad (16) and the anti-slip sleeve are made of rubber.

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