Safety type movable lifting working platform

Abstract

The invention relates to the technical field of lifting working platforms, in particular to a safety type movable lifting working platform which comprises a base and a working platform body, a guardrail is fixed to the working platform body, one end of a crawling ladder is movably connected to the guardrail, and the other end of the crawling ladder is movably connected to the working platform body. A guide mechanism and a limiting mechanism are arranged between the guardrail and the crawling ladder; the working platform has the beneficial effects that when the working platform descends to a low position, the crawling ladder descends downwards from the crawling ladder inserting opening, and a worker can conveniently climb to the working platform through the crawling ladder and enters from the climbing notch; when the top end of the crawling ladder is flush with the top end of the guardrail, the limiting mechanism is started to limit the crawling ladder at the height, the crawling ladder can be used for filling and blocking the climbing notch, the situation that a worker accidentally falls off from the climbing notch after the working platform is lifted to the high position is prevented, and meanwhile the requirement for convenient climbing of the worker is met.

Description

Technical Field

[0001] This invention relates to the field of lifting work platform technology, specifically a safe mobile lifting work platform. Background Technology

[0002] Lifting work platforms are mechanical devices used to safely elevate personnel, tools, and materials to elevated work positions. They are modern alternatives to ladders or traditional scaffolding, offering greater efficiency and safety.

[0003] In the prior art, patent application CN202323575036.6 discloses a lifting platform for pruning seedlings in landscaping projects, comprising: a base plate, a hydraulic cylinder and an oil tank at the top of the base plate, an oil pipe connecting the hydraulic cylinder and the oil tank, a piston movably connected in the hydraulic cylinder, a push rod fixed at one end of the piston, and several sets of locking block slots formed on the surface of the push rod, with locking blocks movably inserted into the locking block slots, and several sets of locking blocks, one set of which has one end abutting against the surface of the hydraulic cylinder; the beneficial effect is that a portion of the force originally borne entirely by the inner wall of the hydraulic cylinder in contact with the hydraulic oil is distributed to the parts of the hydraulic cylinder not in contact with the hydraulic oil, thereby making the force on all parts of the hydraulic cylinder more balanced, reducing the possibility of cracks in the cylinder wall, and lowering the maintenance cost of the lifting platform for pruning seedlings in landscaping projects.

[0004] However, existing lifting platforms lack guardrails, resulting in low safety for personnel working on them. Simply fixing guardrails to the lifting platform makes it difficult for workers to climb, while leaving climbing gaps in the guardrails can easily lead to workers falling from these gaps while working at heights. Therefore, it is necessary to design a safe mobile lifting work platform that meets safety requirements while also allowing workers to easily climb. Summary of the Invention

[0005] The purpose of this invention is to provide a safe mobile lifting work platform to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safe mobile lifting work platform, comprising: a base and a work platform, wherein a guardrail is fixed on the work platform, one end of a ladder is movably connected to the guardrail, the other end of the ladder is movably connected to the work platform, and a guide mechanism and a limiting mechanism are provided between the guardrail and the ladder.

[0007] Preferably, the guardrail has a climbing notch, which is a rectangular groove structure. The working platform is a rectangular plate, and a ladder insertion interface is provided on the working platform. One end of the ladder is movably inserted into the climbing notch, and the other end of the ladder is movably inserted into the ladder insertion interface.

[0008] Preferably, the guiding mechanism includes: a slide groove and a slider, and two sets of slide grooves and sliders are provided. The slide groove is a rectangular groove, and the two sets of slide grooves are respectively opened on two symmetrical inner walls of the climbing gap. The slider is a rectangular block structure, and the two sets of sliders are respectively fixed on two symmetrical end faces of the climbing ladder, and the two sets of sliders are slidably connected in the two sets of slide grooves.

[0009] Preferably, the limiting mechanism includes: a limiting rod mounting base, a limiting seat, and a limiting rod. One end of the limiting rod is movably connected to the limiting rod mounting base, and the other end of the limiting rod is movably connected to the limiting seat. The limiting rod mounting base is fixed to the top of the guardrail, the limiting seat is fixed to the top of the ladder, and a locking mechanism is provided between the limiting seat and the limiting rod.

[0010] Preferably, both the limiting rod mounting base and the limiting seat are rectangular plate structures. The ends of the limiting rod mounting base and the limiting seat that are close to each other are respectively provided with a limiting rod mounting groove and a limiting groove. Both the limiting rod mounting groove and the limiting groove are rectangular grooves. The limiting rod is a rectangular rod structure. One end of the limiting rod is movably inserted into the limiting rod mounting groove, and the other end of the limiting rod is movably inserted into the limiting groove.

[0011] Preferably, the end of the limiting rod mounting base away from the limiting seat has a pull rod hole, which is rectangular and communicates with the limiting rod mounting groove.

[0012] Preferably, a pull rod is movably inserted into the pull rod hole. The pull rod has a "T"-shaped rod structure. One end of the thinner part of the pull rod is movably inserted into the pull rod hole, and the other end of the thinner part of the pull rod extends into the limiting rod mounting groove and is fixed on the limiting rod. The length of the thicker part of the pull rod is greater than the opening of the pull rod hole.

[0013] Preferably, the locking mechanism includes: an anti-loosening groove, an anti-loosening rod mounting groove, and an anti-loosening rod. Both the anti-loosening groove and the anti-loosening rod mounting groove are circular groove structures. The anti-loosening groove is formed on the limiting rod, and the anti-loosening rod mounting groove is formed on the limiting seat. One end of the anti-loosening rod is movably inserted into the anti-loosening groove, and the other end of the anti-loosening rod is movably inserted into the anti-loosening rod mounting groove.

[0014] Preferably, the limiting seat has a screw hole, in which a hand screw is rotatably connected. The screw hole has an internal thread, and the shank of the hand screw has an external thread. The external thread of the hand screw mates with the internal thread of the screw hole, and one end of the shank of the hand screw extends into the anti-loosening rod mounting groove and is fixed on the anti-loosening rod.

[0015] Preferably, the bottom end of the base is rotatably connected to four sets of rollers, the four sets of rollers are distributed at the four corners of the base, the sides of the base are fixed with four sets of second hydraulic push rod mechanisms, and one end of the base is fixed with a traction plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The safety-type mobile lifting work platform proposed in this invention features a ladder that descends from the ladder insertion interface when the work platform is at a low position. The slider follows the ladder downwards. Once the slider reaches the bottom of the slide groove, it can no longer move downwards. At this point, the top of the ladder is located at the bottom of the climbing gap, which is very close to the ground. The climbing gap is open, allowing workers to easily climb onto the work platform and enter through it. Once the worker is standing on the work platform, they can pull the ladder upwards by holding the handle. When the top of the ladder is level with the top of the guardrail, a limiting mechanism is activated to restrict the ladder to this height. This effectively fills the climbing gap, preventing workers from accidentally falling through it when the work platform is raised to a higher position, while also allowing for convenient climbing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the roller structure; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 6 for Figure 3 Enlarged schematic diagram of the structure at point C.

[0018] In the diagram: 1. Base; 2. Working platform; 3. Guardrail; 4. Climbing gap; 5. Ladder; 6. Ladder connector; 7. Slide rail; 8. Limiting rod mounting seat; 9. Limiting seat; 10. Limiting rod mounting groove; 11. Limiting groove; 12. Limiting rod; 13. Pull rod hole; 14. Pull rod; 15. Anti-loosening groove; 16. Anti-loosening rod mounting groove; 17. Anti-loosening rod; 18. Screw hole; 19. Hand screw; 20. Handle; 21. First hydraulic push rod mechanism; 22. First slide rail; 23. First support rod; 24. Rotating shaft; 25. Second support rod; 26. Second support rod mounting seat; 27. First support rod mounting seat; 28. Second slide rail; 29. ​​Slide rail groove; 30. Roller; 31. Second hydraulic push rod mechanism; 32. Traction plate; 33. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 to 6 This invention provides a technical solution: a safe mobile lifting work platform, comprising: a base 1 and a work platform 2, characterized in that: a guardrail 3 is fixed on the work platform 2, one end of a ladder 5 is movably connected to the guardrail 3, and the other end of the ladder 5 is movably connected to the work platform 2; a guide mechanism and a limiting mechanism are provided between the guardrail 3 and the ladder 5; a climbing notch 4 is provided on the guardrail 3, the climbing notch 4 being a rectangular groove structure; the work platform 2 is a rectangular plate, and a ladder insertion interface 6 is provided on the work platform 2, one end of the ladder 5 being movably inserted into the climbing notch 4, and the other end of the ladder 5 being movably connected to the climbing notch 4. The base 1 is rotatably connected to the ladder connector 6. Four sets of rollers 31 are rotatably connected to the bottom end of the base 1. The four sets of rollers 31 are distributed at the four corners of the base 1. Four sets of second hydraulic push rod mechanisms 32 are fixed on the side of the base 1. A traction plate 33 is fixed at one end of the base 1. The guide mechanism includes: a slide groove 7 and a slider 8. There are two sets of slide grooves 7 and two sets of sliders 8. The slide groove 7 is a rectangular groove. The two sets of slide grooves 7 are respectively opened on the two symmetrical inner walls of the climbing gap 4. The slider 8 is a rectangular block structure. The two sets of sliders 8 are respectively fixed on the two symmetrical end faces of the ladder 5, and the two sets of sliders 8 are slidably connected in the two sets of slide grooves 7.

[0021] In actual use, when the work platform 2 is lowered, the ladder 5 descends from the ladder insertion interface 6, and the slider 8 follows the ladder 5 downwards. When the slider 8 reaches the bottom of the slide 7, it can no longer move downwards. At this time, the top of the ladder 5 is located at the bottom of the climbing gap 4, and the bottom of the ladder 5 is at a height very close to the ground. The climbing gap 4 is open, and workers can easily climb onto the work platform 2 using the ladder 5 and enter through the climbing gap 4. After the worker stands on the work platform 2, they can pull the ladder 5 upwards by holding the handle 21. When the top of the ladder 5 is level with the top of the guardrail 3, the limit mechanism is activated to restrict the ladder 5 to this height. This allows the ladder 5 to fill the climbing gap 4, preventing the work platform from being leveled. After platform 2 is raised to a high position, a worker accidentally falls through climbing gap 4, which also facilitates the worker's climbing. In addition, when it is necessary to move the lifting work platform, the towing plate 33 is connected to a tractor or other towing vehicle, so that the hydraulic rod of the second hydraulic strut mechanism 32 retracts into the hydraulic cylinder of the second hydraulic strut mechanism 32, so that the roller 31 contacts the ground, and then the lifting work platform can be moved by the tractor. When it is moved to the working position, the hydraulic rod of the second hydraulic strut mechanism 32 extends out of the hydraulic cylinder of the second hydraulic strut mechanism 32, and the second hydraulic strut mechanism 32 lifts the base 1 upward, so that the roller 31 leaves the ground, thereby realizing the limit of the base 1 and increasing the safety of the lifting work platform.

[0022] Example 2: Based on Example 1, in order to achieve the limiting and releasing of the ladder 5, the limiting mechanism includes: a limiting rod mounting base 9, a limiting seat 10, and a limiting rod 13. One end of the limiting rod 13 is movably connected to the limiting rod mounting base 9, and the other end of the limiting rod 13 is movably connected to the limiting seat 10. The limiting rod mounting base 9 is fixed to the top of the guardrail 3, and the limiting seat 10 is fixed to the top of the ladder 5. A locking mechanism is provided between the limiting seat 10 and the limiting rod 13. Both the limiting rod mounting base 9 and the limiting seat 10 are rectangular plate structures. Limiting rod mounting grooves 11 and 12 are respectively opened at the ends of the limiting rod mounting base 9 and the limiting seat 10 that are close to each other. All grooves 12 are rectangular grooves, and the limiting rod 13 is a rectangular rod structure. One end of the limiting rod 13 is movably inserted into the limiting rod mounting groove 11, and the other end of the limiting rod 13 is movably inserted into the limiting groove 12. The end of the limiting rod mounting base 9 away from the limiting base 10 has a pull rod hole 14. The pull rod hole 14 is a rectangular hole and communicates with the limiting rod mounting groove 11. A pull rod 15 is movably inserted into the pull rod hole 14. The pull rod 15 is a "T" shaped rod structure. One end of the thin rod of the pull rod 15 is movably inserted into the pull rod hole 14, and the other end of the thin rod of the pull rod 15 extends into the limiting rod mounting groove 11 and is fixed to the limiting rod 13. The length of the thick rod of the pull rod 15 is greater than the opening of the hole 14.

[0023] When the ladder 5 moves upward, pull the lever 15 so that one end of the lever 15 extends out of the lever hole 14, causing the limit rod 13 to fully retract into the limit rod mounting groove 11. When the ladder 5 rises to the point where the limit seat 10 is aligned with the limit rod mounting seat 9, the limit rod mounting groove 11 is aligned with the limit groove 12. Then, push the lever 15 to push one end of the limit rod 13 into the limit groove 12, while the other end of the limit rod 13 remains in the limit rod mounting groove 11, thus achieving height limitation of the ladder 5. Pull the lever 15 again, and the lever 14 will drive the limit rod 13, causing the limit rod 13 to exit from the limit groove 12 and retract into the mounting groove 11, thus releasing the limit.

[0024] Example 3: Based on Example 2, in order to lock 13 in 12, the locking mechanism includes: anti-loosening groove 16, anti-loosening rod mounting groove 17, and anti-loosening rod 18. Both anti-loosening groove 16 and anti-loosening rod mounting groove 17 are circular groove structures. Anti-loosening groove 16 is opened on the limiting rod 13, and anti-loosening rod mounting groove 17 is opened on the limiting seat 10. One end of anti-loosening rod 18 is movably inserted into anti-loosening groove 16, and the other end of anti-loosening rod 18 is movably inserted into anti-loosening rod mounting groove 17. The limiting seat 10 is provided with screw hole 19, and a hand screw 20 is rotatably connected in screw hole 19. The screw hole 19 is provided with internal thread, and the rod of hand screw 20 is provided with external thread. The external thread of hand screw 20 is engaged with the internal thread of screw hole 19. One end of the rod of hand screw 20 extends into anti-loosening rod mounting groove 17 and is fixed on anti-loosening rod 18.

[0025] Rotating the hand screw 20 pushes one end of the anti-loosening rod 18 from the anti-loosening rod mounting slot 17 to the anti-loosening groove 16 through the threaded connection between the screw hole 19 and the hand screw 20, thereby locking the limiting rod 13 in the limiting groove 12 and preventing the limiting rod 13 from accidentally coming out of the limiting groove 12 when the pull rod 15 is accidentally touched. Rotating the hand screw 20 in the opposite direction causes the anti-loosening rod 18 to come out of the anti-loosening groove 16 through the threaded connection between the screw hole 19 and the hand screw 20, thus releasing the lock.

[0026] In actual use, when the work platform 2 is lowered, the ladder 5 descends from the ladder insertion interface 6, and the slider 8 follows the ladder 5 downwards. When the slider 8 reaches the bottom of the slide 7, it can no longer move downwards. At this time, the top of the ladder 5 is located at the bottom of the climbing gap 4, and the bottom of the ladder 5 is at a height very close to the ground. The climbing gap 4 is open, and the worker can easily climb onto the work platform 2 using the ladder 5 and enter through the climbing gap 4. After the worker stands on the work platform 2, he can pull the ladder 5 upwards by holding the handle 21. When the top of the ladder 5 is level with the top of the guardrail 3, the limit mechanism is activated to restrict the ladder 5. At this height, the climbing gap 4 can be filled by the ladder 5 to prevent workers from accidentally falling through the gap 4 after the work platform 2 is raised to a higher position, while also allowing workers to climb easily. Furthermore, when the lifting work platform needs to be moved, the towing plate 33 is connected to a tractor or other towing vehicle, causing the hydraulic rod of the second hydraulic strut mechanism 32 to retract into its hydraulic cylinder, making the roller 31 contact the ground. Then, the lifting work platform can be moved by dragging it with a tractor. Once moved to the working position, the hydraulic rod of the second hydraulic strut mechanism 32 is disengaged from its hydraulic cylinder. The second hydraulic push rod mechanism 32 extends outward, lifting the base 1 upward and causing the roller 31 to leave the ground, thus limiting the base 1 and increasing the safety of the lifting platform. When the ladder 5 moves upward, the pull rod 15 is pulled, causing one end of the pull rod 15 to extend from the pull rod hole 14, driving the limit rod 13 to fully retract into the limit rod mounting groove 11. When the ladder 5 rises to the point where the limit seat 10 is aligned with the limit rod mounting seat 9, the limit rod mounting groove 11 is aligned with the limit groove 12. Then, the pull rod 15 is pushed to push one end of the limit rod 13 into the limit groove 12, and the other end of the limit rod 13 remains in the limit rod mounting groove 11, thus limiting the height of the ladder 5. Pull the lever 15 again, and the lever 14 will drive the limit lever 13, causing the limit lever 13 to exit from the limit groove 12 and retract into the mounting groove 11, thus releasing the limit. Rotate the hand screw 20, and through the threaded connection between the screw hole 19 and the hand screw 20, push one end of the anti-loosening rod 18 from the anti-loosening rod mounting groove 17 to the anti-loosening groove 16, thereby locking the limit lever 13 in the limit groove 12 and preventing the limit lever 13 from accidentally exiting the limit groove 12 when the lever 15 is accidentally touched. Rotate the hand screw 20 in the opposite direction, and through the threaded connection between the screw hole 19 and the hand screw 20, make the anti-loosening rod 18 exit from the anti-loosening groove 16, thus releasing the lock.When the height of the work platform 2 needs to be raised, the hydraulic rod of the first hydraulic push rod mechanism 22 extends from the hydraulic cylinder and pushes the bottom end of the first support rod 24 along the first slide rail 23 towards the second support rod mounting seat 27 via the rotating shaft 25. With the cooperation of the slide rail groove 30 opened on the second slide rail 29 and the roller 31, the top end of the first support rod 24 moves towards the first support rod mounting seat 28. As the first support rod 24 and the second support rod 26 rotate, the clamp between the first support rod 24 and the second support rod 26 and the horizontal plane... As the angle gradually increases, the top heights of the first support rod 24 and the second support rod 26 gradually increase, thus gradually raising the height of the work platform 2. Similarly, when the distance by which the hydraulic rod of the first hydraulic tappet mechanism 22 extends beyond the first hydraulic tappet mechanism 22 shortens, the first support rod 24 moves away from the second support rod mounting base 27, causing the angle between the first support rod 24, the second support rod 26 and the horizontal plane to gradually decrease, and the top heights of the first support rod 24 and the second support rod 26 to decrease, thus lowering the height of the work platform 2.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safe mobile lifting work platform, comprising: The base (1) and the working platform (2) are characterized in that: a guardrail (3) is fixed on the working platform (2), one end of a ladder (5) is movably connected to the guardrail (3), the other end of the ladder (5) is movably connected to the working platform (2), and a guide mechanism and a limiting mechanism are provided between the guardrail (3) and the ladder (5).

2. The safe mobile lifting work platform according to claim 1, characterized in that: The guardrail (3) has a climbing notch (4), which is a rectangular groove structure. The work platform (2) is a rectangular plate. The work platform (2) has a ladder insertion interface (6). One end of the ladder (5) is movably inserted into the climbing notch (4), and the other end of the ladder (5) is movably inserted into the ladder insertion interface (6).

3. The safe mobile lifting work platform according to claim 1, characterized in that: The guiding mechanism includes a slide (7) and a slider (8). Both the slide (7) and the slider (8) are provided in two sets. The slide (7) is a rectangular groove. The two sets of slides (7) are respectively opened on the two symmetrical inner walls of the climbing gap (4). The slider (8) is a rectangular block structure. The two sets of sliders (8) are respectively fixed on the two symmetrical end faces of the climbing ladder (5), and the two sets of sliders (8) are respectively slidably connected in the two sets of slides (7).

4. The safe mobile lifting work platform according to claim 1, characterized in that: The limiting mechanism includes: a limiting rod mounting base (9), a limiting seat (10), and a limiting rod (13). One end of the limiting rod (13) is movably connected to the limiting rod mounting base (9), and the other end of the limiting rod (13) is movably connected to the limiting seat (10). The limiting rod mounting base (9) is fixed to the top of the guardrail (3), and the limiting seat (10) is fixed to the top of the ladder (5). A locking mechanism is provided between the limiting seat (10) and the limiting rod (13).

5. A safe mobile lifting work platform according to claim 3, characterized in that: The limiting rod mounting base (9) and the limiting seat (10) are both rectangular plate structures. The limiting rod mounting base (9) and the limiting seat (10) are respectively provided with a limiting rod mounting groove (11) and a limiting groove (12) at their respective ends. The limiting rod mounting groove (11) and the limiting groove (12) are both rectangular grooves. The limiting rod (13) is a rectangular rod structure. One end of the limiting rod (13) is movably inserted into the limiting rod mounting groove (11), and the other end of the limiting rod (13) is movably inserted into the limiting groove (12).

6. A safe mobile lifting work platform according to claim 5, characterized in that: The limit rod mounting base (9) has a pull rod hole (14) at one end away from the limit seat (10). The pull rod hole (14) is rectangular and communicates with the limit rod mounting groove (11).

7. A safe mobile lifting work platform according to claim 6, characterized in that: A pull rod (15) is movably inserted into the pull rod hole (14). The pull rod (15) has a "T" shaped rod structure. One end of the thin rod of the pull rod (15) is movably inserted into the pull rod hole (14), and the other end of the thin rod of the pull rod (15) extends into the limiting rod mounting groove (11) and is fixed on the limiting rod (13). The length of the thick rod of the pull rod (15) is greater than the opening of the pull rod hole (14).

8. A safe mobile lifting work platform according to claim 4, characterized in that: The locking mechanism includes: an anti-loosening groove (16), an anti-loosening rod mounting groove (17), and an anti-loosening rod (18). Both the anti-loosening groove (16) and the anti-loosening rod mounting groove (17) are circular groove structures. The anti-loosening groove (16) is opened on the limiting rod (13), and the anti-loosening rod mounting groove (17) is opened on the limiting seat (10). One end of the anti-loosening rod (18) is movably inserted into the anti-loosening groove (16), and the other end of the anti-loosening rod (18) is movably inserted into the anti-loosening rod mounting groove (17).

9. A safe mobile lifting work platform according to claim 8, characterized in that: The limiting seat (10) has a screw hole (19) and a hand screw (20) is rotatably connected in the screw hole (19). The screw hole (19) has an internal thread and the shank of the hand screw (20) has an external thread. The external thread of the hand screw (20) is engaged with the internal thread of the screw hole (19). One end of the shank of the hand screw (20) extends into the anti-loosening rod mounting groove (17) and is fixed on the anti-loosening rod (18).

10. A safe mobile lifting work platform according to claim 1, characterized in that: The base (1) is rotatably connected to four sets of rollers (31), which are distributed at the four corners of the base (1). The base (1) is fixed with four sets of second hydraulic push rod mechanisms (32) on its side, and a traction plate (33) is fixed at one end of the base (1).

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