A lifting work platform

Abstract

This utility model proposes a lifting work ladder, including a movable chassis, a fixed staircase, a movable staircase, a work platform, a telescopic mechanism, and a support mechanism. The fixed staircase is fixedly installed on the movable chassis. The two ends of the movable staircase are respectively hinged to the fixed staircase and the work platform. The telescopic mechanism is installed on the movable chassis and is hinged to the work platform. The telescopic mechanism can extend and retract to adjust the height of the work platform. It is suitable for the operation needs of various work points at different heights, making it convenient for workers to work on the work platform. The height of the lifting work ladder can be flexibly adjusted, eliminating the need for multiple ladders and making it highly versatile.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude operation technology, and in particular to a lifting work ladder. Background Technology

[0002] In the field of high-altitude operations, work ladders are the preferred tool for low-altitude work due to their lightweight, flexibility, rapid deployment, and low cost. However, fixed work ladders on the market have significant drawbacks, specifically: 1. Insufficient height leading to safety hazards: When the work point is slightly higher than the top platform of the ladder, personnel are prone to taking improper actions, causing their center of gravity to exceed the support range, making them highly susceptible to loss of balance and falls. 2. Excessive height reducing efficiency and safety: When the ladder height is much higher than the actual work point, personnel need to climb to an excessive height before bending over to work, prolonging the climbing time; in emergency operations, the risk of missteps and slips increases due to accelerated climbing. 3. Poor adaptability affecting operational stability: When taller personnel use fixed-height ladders, the top platform is too low, which can easily cause head collisions with obstacles; shorter personnel need to raise their arms significantly to reach the work point after climbing to the top, indirectly affecting operational stability. 4. Weak environmental adaptability: After the layout of the work area is adjusted (such as raising shelves or relocating equipment), the original fixed-height ladder may change from "suitable" to "redundant" or "insufficient". 5. Limited Reusability in Multiple Scenarios: In places such as warehouses and repair workshops where flexible operation at different heights is required, fixed-height ladders have limited functionality and require multiple ladders of different heights, which not only takes up space but also increases management and maintenance costs.

[0003] The core problem with the aforementioned work ladders is their inability to dynamically adapt to changes in working height, personnel, and scenarios, which leads to issues such as improper operation, low efficiency, and safety risks.

[0004] Therefore, it is necessary to provide a lifting work ladder to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a lifting work ladder that is suitable for the work needs of various work points at different heights, making it convenient for workers to work on the work platform. The height of the lifting work ladder can be flexibly adjusted, eliminating the need to equip multiple ladders, and it has strong versatility.

[0006] To achieve the above objectives, the technical solution proposed by this utility model is as follows: a lifting work ladder, comprising a movable chassis, a fixed staircase, a following staircase, a work platform, and a telescopic mechanism; The fixed staircase is fixedly installed on the movable chassis. The two ends of the movable staircase are respectively hinged to the fixed staircase and the workbench. The telescopic mechanism is installed on the movable chassis and is hinged to the workbench. The telescopic mechanism can extend and retract to adjust the height of the workbench.

[0007] Preferably, the movable chassis includes a base frame, pulleys, and self-locking rollers; the pulleys are installed at the front end of the base frame, and the self-locking rollers are installed at the rear end of the base frame.

[0008] Preferably, the fixed staircase includes a side panel and a first tread, the side panel being mounted on the front end of the base frame, and the first tread being mounted on the side panel.

[0009] Preferably, the fixed staircase further includes a handrail and a railing, the workbench includes a base plate and a guardrail that partially surrounds the base plate, the handrail is installed on the side plate, and the two ends of the railing are respectively hinged to the handrail and the guardrail of the workbench.

[0010] Preferably, the movable staircase includes a side beam, a second tread, and a pull rod. The lower end of the side beam is hinged to the side plate, and the upper end of the side beam is hinged to the bottom plate of the workbench. The second tread is rotatably mounted on the side beam via a connecting shaft. The lower end of the pull rod is hinged to the side plate, the upper end of the pull rod is hinged to the bottom plate of the workbench, and the middle section of the pull rod is hinged to a mounting pin on the second tread.

[0011] Preferably, it also includes a support mechanism, which includes a telescopic rod and a support frame. One end of the telescopic rod is hinged to the movable chassis, and the other end of the telescopic rod is hinged to the support frame. The support frame is fixedly installed with the side beam.

[0012] Preferably, the telescopic mechanism includes an inner cylinder, an outer cylinder, and a lead screw. The inner cylinder is slidably housed in the outer cylinder, and a nut is provided on the lead screw. The lead screw is housed in both the inner and outer cylinders, and the inner cylinder is connected to the nut provided on the lead screw.

[0013] Preferably, the upper end of the inner cylinder is provided with a fork head, and the fork head is provided with a rotating shaft, which is rotatably connected to the bottom of the base plate of the workbench.

[0014] Preferably, the lifting work ladder further includes a drive mechanism, which includes a drive shaft, a drive wheel, and a chain. The lower end of the lead screw is provided with a first bevel gear, and one end of the drive shaft is provided with a second bevel gear. The first bevel gear and the second bevel gear mesh with each other. The other end of the drive shaft is provided with a driven wheel. The drive wheel and the driven wheel are spaced apart, and the chain is sleeved on the drive wheel and the driven wheel.

[0015] Preferably, the drive mechanism further includes a mounting beam, which is rotatably mounted on a movable chassis, the driven wheel is rotatably mounted on the mounting beam, the drive wheel is rotatably mounted on the mounting beam, and the chain is housed within the mounting beam.

[0016] Compared with existing technologies, the advantages are: 1) The height of the workbench can be adaptively adjusted according to the work point, which is suitable for the work needs of various work points at different heights, making it convenient for workers to work on the workbench. The height of the lifting work ladder can be flexibly adjusted and used, eliminating the need to equip multiple ladders, and it has strong versatility.

[0017] 2) During the process of staff climbing the ladder, it is easy to hold onto the handrails, railings and guardrails to avoid slipping and falling, which can play a role in safety protection.

[0018] Other features and advantages of this invention will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the invention. The features and advantages of this invention may be realized and obtained by means of the elements and combinations specifically pointed out in the appended claims. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A perspective view of the lifting work ladder provided by this utility model.

[0021] Figure 2 for Figure 1 An enlarged view of region A shown.

[0022] Figure 3 for Figure 1 The diagram shows a combination of lifting work ladders.

[0023] Figure 4 for Figure 1 The diagram shows the structure of the following staircase of the lifting work ladder.

[0024] Figure 5 for Figure 1 The diagram shows the combination of the telescopic mechanism and the drive mechanism.

[0025] Reference numerals: 1. Movable chassis; 11. Base frame; 12. Pulley; 13. Self-locking roller; 2. Fixed staircase; 21. Side plate; 22. First tread; 23. Handrail; 24. Railing; 3. Movable staircase; 30. Connecting shaft; 31. Side beam; 32. Second tread; 321. Mounting pin; 33. Pull rod; 4. Workbench; 41. Base plate; 42. Guardrail; 5. Telescopic mechanism; 51. Inner cylinder; 511. Fork head; 512. Rotating shaft; 52. Outer cylinder; 53. Lead screw; 54. Nut; 55. First bevel gear; 6. Drive mechanism; 61. Transmission shaft; 62. Drive wheel; 63. Chain; 64. Second bevel gear; 65. Driven wheel; 66. Mounting beam; 67. Balance shaft; 68. Third bevel gear; 7. Support mechanism; 71. Telescopic rod; 72. Support frame. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.

[0027] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0030] Please see Figures 1 to 5 This utility model provides a lifting work ladder, including a movable chassis 1, a fixed staircase 2, a follow-up staircase 3, a work platform 4, and a telescopic mechanism 5; The fixed staircase 2 is fixedly installed on the movable chassis 1. The two ends of the movable staircase 3 are respectively hinged to the fixed staircase 2 and the workbench 4. The telescopic mechanism 5 is installed on the movable chassis 1 and is hinged to the workbench 4. The telescopic mechanism 5 can extend and retract to adjust the height of the workbench 4.

[0031] Thus, when the telescopic mechanism 5 extends to lift the work platform 4, it raises the height of the work platform 4, and the following staircase 3 moves synchronously with the work platform 4, making the slope of the following staircase 3 steeper; when the telescopic mechanism 5 retracts to lower the work platform 4, it lowers the height of the work platform 4, and the following staircase 3 moves synchronously with the work platform 4, making the slope of the following staircase 3 gentler.

[0032] In practical applications, since the height of most ladders is fixed, it is difficult to avoid situations where the ladder is too high or too low compared to the work point. Therefore, in this technical solution, the height of the workbench 4 can be flexibly adjusted by the telescopic distance of the telescopic mechanism 5 as the work scene changes, adapting to the height of the work point and making up for the shortcomings of the existing fixed ladder height.

[0033] In a preferred embodiment, the movable chassis 1 includes a base frame 11, pulleys 12, and self-locking rollers 13; the pulleys 12 are mounted at the front end of the base frame 11, and the self-locking rollers 13 are mounted at the rear end of the base frame 11. It should be noted that in this embodiment, there are two pulleys 12 and two self-locking rollers 13, with the two pulleys 12 spaced apart at the front end of the base frame 11 and the two self-locking rollers 13 spaced apart at the rear end of the base frame 11. It should also be noted that in practical applications, the front pulleys 12 and the rear self-locking rollers 13 can be interchanged.

[0034] In this way, the balance of the base frame 11 can be guaranteed, and the movable chassis 1 of the lifting work ladder can move freely on the ground. When the self-locking rollers 13 are locked, the lifting work ladder can be prevented from moving freely, which is conducive to the fixed parking of the lifting work ladder.

[0035] In a preferred embodiment, the fixed staircase 2 includes a side plate 21 and a first tread 22. The side plate 21 is fixedly installed on the front end of the base frame 11, and the first tread 22 is fixedly installed on the side plate 21.

[0036] It should be noted that in this embodiment, there are two side plates 21 and two first pedals 22. The two side plates 21 are installed along both sides of the base frame 11, and the two first pedals 22 are installed at intervals between the two side plates 21. In this way, the base frame 11, side plates 21, and first pedals 22 are fixedly installed, preventing the side plates 21 from becoming loose from the first pedals 22.

[0037] In a preferred embodiment, the fixed staircase 2 further includes a handrail 23 and a railing 24. The workbench 4 includes a base plate 41 and a guardrail 42 that partially surrounds the base plate 41. The handrail 23 is fixedly installed on the side plate 21, and the two ends of the railing 24 are hinged to the handrail 23 and the guardrail 42 of the workbench 4, respectively. During the process of climbing the ladder, workers can easily hold onto the handrail 23, the railing 24, and the guardrail 42 to avoid slipping and falling, thus providing a safety protection function.

[0038] In a preferred embodiment, the movable staircase 3 includes a side beam 31, a second tread 32, and a pull rod 33. The lower end of the side beam 31 is hinged to the side plate 21, and the upper end of the side beam 31 is hinged to the base plate 41 of the workbench 4. The second tread 32 is rotatably mounted on the side beam 31 via a connecting shaft 30. The lower end of the pull rod 33 is hinged to the side plate 21, the upper end of the pull rod 33 is hinged to the base plate 41 of the workbench 4, and the middle section of the pull rod 33 is hinged to the mounting pin 321 on the second tread 32.

[0039] It should be noted that, in this embodiment, as Figure 4 As shown, there are two side beams 31. The lower ends of the two side beams 31 are hinged to the two side plates 21 to form hinge point A1, and the upper ends of the two side beams 31 are hinged to the bottom plate 41 of the workbench 4 to form hinge point A2. There are multiple second pedals 32, which are spaced apart and are rotatably mounted between the two side beams 31 via connecting shafts 30 to form multiple rotation points (E1, E2...En, which are collinear with hinge points A1 and A2). The lower end of the pull rod 33 is hinged to the side plate 21 to form hinge point B1, and the upper end of the pull rod 33 is hinged to the bottom plate 41 of the workbench 4 to form hinge point B2. The middle section of the pull rod 33 is hinged to the mounting pins 321 on the multiple second pedals 32 to form multiple rotation points (F1...Fn, which are collinear with hinge points B1 and B2). The connecting shaft 30 can be provided with an external thread, which, in conjunction with a nut, allows for hinged installation with the side beam 31. Thus, when the worktable 4 moves in conjunction with the staircase 3, the multiple second treads 32 remain horizontal.

[0040] In a preferred embodiment, the telescopic mechanism 5 includes an inner cylinder 51, an outer cylinder 52, and a lead screw 53. The inner cylinder 51 is slidably housed in the outer cylinder 52. A nut 54 is provided on the lead screw 53. The lead screw 53 is housed in the inner cylinder 51 and the outer cylinder 52, and the inner cylinder 51 is connected to the nut 54 on the lead screw 53. The lead screw 53 can rotate in the inner cylinder 51 and the outer cylinder 52. The nut 54 moves up and down along the lead screw 53, thereby driving the inner cylinder 51 to move up and down.

[0041] During the movement, the lead screw 53 rotates, and the nut 54 cooperates with the lead screw 53 to convert the rotational motion into linear motion, driving the inner cylinder 51 to move up and down, so as to realize the extension and retraction of the inner cylinder 51 within the outer cylinder 52.

[0042] In a preferred embodiment, the upper end of the inner cylinder 51 is provided with a V-shaped fork 511, and a rotating shaft 512 is provided on the fork 511. The rotating shaft 512 is rotatably connected to the bottom of the base plate 41 of the workbench 4. Thus, when the inner cylinder 51 of the telescopic mechanism 5 moves up and down, the side beam 31, the second tread 32, and the pull rod 33 of the following staircase 3 will be linked together.

[0043] In a preferred embodiment, the lifting work ladder further includes a drive mechanism 6, which is used to drive the lead screw 53 of the telescopic mechanism 5 to rotate and provide power to the lead screw 53.

[0044] Specifically, the drive mechanism 6 includes a drive shaft 61, a drive wheel 62, and a chain 63. A first bevel gear 55 is provided at the lower end of the lead screw 53, and a second bevel gear 64 is provided at one end of the drive shaft 61. The first bevel gear 55 and the second bevel gear 64 mesh with each other. A driven wheel 65 is provided at the other end of the drive shaft 61. The drive wheel 62 and the driven wheel 65 are spaced apart, and the chain 63 is sleeved on the drive wheel 62 and the driven wheel 65.

[0045] It should be noted that, in this embodiment, the drive wheel 62 and the driven wheel 65 can be sprockets, and a docking workpiece 621 for use with a handle or crank can be provided at the center of the drive wheel 62.

[0046] When the drive wheel 62 rotates, it drives the driven wheel 65 to rotate through the chain 63. The second bevel gear 64 on the transmission shaft 61 drives the first bevel gear 55 to rotate, thereby driving the lead screw 53 to rotate and providing power to the lead screw 53. The nut 54 on the lead screw 53 then drives the inner cylinder 51 to move in and out of the outer cylinder 52.

[0047] In a preferred embodiment, the drive mechanism 6 further includes a mounting beam 66, which is rotatably mounted on the base frame 11 of the movable chassis 1. The driven wheel 65 is rotatably mounted on the mounting beam 66, the drive wheel 62 is rotatably mounted on the mounting beam 66, and the chain 63 is housed within the mounting beam 66. By providing the mounting beam 66, it is convenient to install the driven wheel 65 and the drive wheel 62, ensuring that the distance between the driven wheel 65 and the drive wheel 62 remains constant.

[0048] In a preferred embodiment, the drive mechanism 6 further includes a balance shaft 67, which is rotatably mounted on the base frame 11. The balance shaft 67 is distributed at intervals relative to the drive shaft 61, and a third bevel gear is provided at one end of the balance shaft 67 near the drive shaft 61. The third bevel gear meshes with a first bevel gear 55.

[0049] In this way, by having the first bevel gear 55 mesh with the second bevel gear 64 and the third bevel gear 68 on both sides, the balance and stability of the first bevel gear 55 can be guaranteed, which is conducive to achieving a precise fit between the first bevel gear 55, the second bevel gear 64, and the third bevel gear 68.

[0050] In a preferred embodiment, the lifting work ladder further includes a support mechanism 7, which includes a telescopic rod 71 and a support frame 72. One end of the telescopic rod 71 is hinged to the base frame 11 of the movable chassis 1, and the other end of the telescopic rod 71 is hinged to the support frame 72. The support frame 72 is fixedly installed with two side beams 31.

[0051] When the inner cylinder 51 of the telescopic mechanism 5 extends out to lift the work platform 4, the height of the work platform 4 is raised. The side beams 31 and tie rods 33 of the following staircase 3 move synchronously with the work platform 4, and the inclination of the side beams 31 and tie rods 32 of the following staircase 3 changes. The telescopic rod 71 gradually extends to support the following staircase 3. When the inner cylinder 51 of the telescopic mechanism 5 retracts to lower the work platform 4, the height of the work platform 4 is lowered. The side beams 31 and tie rods 33 of the following staircase 3 move synchronously with the work platform 4, and the side beams 31 and tie rods 32 of the following staircase 3 gradually tilt. The telescopic rod 71 gradually retracts and tilts, and the slope of the steps formed by the multiple second treads 32 of the following staircase 3 becomes gentler.

[0052] In use, the lifting work ladder can be pushed to move its movable chassis 1 on the ground, making it easy to move the lifting work ladder to different locations. When the drive wheel 62 is rotated by the handle or crank, the drive wheel 62 drives the driven wheel 65 to rotate through the chain 63. The second bevel gear 64 on the transmission shaft 61 drives the first bevel gear 55 to rotate, thereby driving the lead screw 53 to rotate. The nut 54 on the lead screw 53 then drives the inner cylinder 51 to extend out of the outer cylinder 52, raising the height of the work platform 4. The slope of the steps formed by the multiple second treads 32 of the following staircase 3 becomes steeper.

[0053] When the drive wheel 62 is rotated in the opposite direction by using a handle or crank, the drive wheel 62 drives the driven wheel 65 to rotate through the chain 63. The second bevel gear 64 on the transmission shaft 61 drives the first bevel gear 55 to rotate, thereby driving the lead screw 53 to rotate in the opposite direction. The nut 54 on the lead screw 53 then drives the inner cylinder 51 to retract within the outer cylinder 52, lowering the height of the workbench 4. The follower staircase 3 moves synchronously with the workbench 4, and the slope of the steps formed by the multiple second treads 32 of the follower staircase 3 becomes gentler.

[0054] Therefore, the height of the workbench 4 can be adaptively adjusted according to the work point, which is suitable for the work needs of various work points at different heights. This makes it convenient for workers to work on the workbench 4. The height of the lifting work ladder can be flexibly adjusted and used, eliminating the need to equip multiple ladders, making it highly versatile.

[0055] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A ladder stand comprising: It includes a movable chassis (1), a fixed staircase (2), a movable staircase (3), a workbench (4), and a telescopic mechanism (5); The fixed staircase (2) is fixedly installed on the movable chassis (1). The two ends of the moving staircase (3) are respectively hinged to the fixed staircase (2) and the workbench (4). The telescopic mechanism (5) is installed on the movable chassis (1) and is hinged to the workbench (4). The telescopic mechanism (5) can extend and retract to adjust the height of the workbench (4).

2. The elevating scissor lift of claim 1, wherein, The movable chassis (1) includes a base frame (11), pulleys (12) and self-locking rollers (13); the pulleys (12) are installed at the front end of the base frame (11) and the self-locking rollers (13) are installed at the rear end of the base frame (11).

3. The elevating scissor lift of claim 2, wherein, The fixed staircase (2) includes a side plate (21) and a first tread (22), the side plate (21) being mounted on the front end of the base frame (11), and the first tread (22) being mounted on the side plate (21).

4. The elevating scissor lift of claim 3, wherein, The fixed staircase (2) also includes a handrail (23) and a railing (24). The workbench (4) includes a base plate (41) and a guardrail (42) that is partially enclosed on the base plate (41). The handrail (23) is installed on the side plate (21). The two ends of the railing (24) are respectively hinged to the handrail (23) and the guardrail (42) of the workbench (4).

5. The elevating scissor lift of claim 4, wherein, The moving staircase (3) includes a side beam (31), a second tread (32), and a pull rod (33). The lower end of the side beam (31) is hinged to the side plate (21), and the upper end of the side beam (31) is hinged to the bottom plate (41) of the workbench (4). The second tread (32) is rotatably mounted on the side beam (31) via a connecting shaft (30). The lower end of the pull rod (33) is hinged to the side plate (21), and the upper end of the pull rod (33) is hinged to the bottom plate (41) of the workbench (4). The middle section of the pull rod (33) is hinged to the mounting pin (321) on the second tread (32).

6. The elevating scissor lift of claim 5, wherein, It also includes a support mechanism (7), which includes a telescopic rod (71) and a support frame (72). One end of the telescopic rod (71) is hinged to the movable chassis (1), and the other end of the telescopic rod (71) is hinged to the support frame (72). The support frame (72) is fixedly installed with the side beam (31).

7. The elevating scissor lift of claim 1, wherein, The telescopic mechanism (5) includes an inner cylinder (51), an outer cylinder (52), and a lead screw (53). The inner cylinder (51) is slidably housed in the outer cylinder (52). A nut (54) is provided on the lead screw (53). The lead screw (53) is housed in the inner cylinder (51) and the outer cylinder (52), and the inner cylinder (51) is connected to the nut (54) provided on the lead screw (53).

8. The elevating scissor lift of claim 7, wherein, The upper end of the inner cylinder (51) is provided with a fork head (511), and a rotating shaft (512) is provided on the fork head (511). The rotating shaft (512) is rotatably connected to the bottom of the worktable (4).

9. The elevating scissor lift of claim 7, wherein, The lifting work ladder also includes a drive mechanism (6), which includes a drive shaft (61), a drive wheel (62), and a chain (63). The lower end of the lead screw (53) is provided with a first bevel gear (55), and one end of the drive shaft (61) is provided with a second bevel gear (64). The first bevel gear (55) and the second bevel gear (64) mesh with each other. The other end of the drive shaft (61) is provided with a driven wheel (65). The drive wheel (62) and the driven wheel (65) are spaced apart. The chain (63) is sleeved on the drive wheel (62) and the driven wheel (65).

10. The elevated scaffold of claim 9, wherein, The drive mechanism (6) further includes a mounting beam (66), which is rotatably mounted on a movable chassis (1), the driven wheel (65) is rotatably mounted on the mounting beam (66), the drive wheel (62) is rotatably mounted on the mounting beam (66), and the chain (63) is housed within the mounting beam (66).

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