Multifunctional and multipurpose maintenance ladder

Abstract

The invention provides a multifunctional and multipurpose maintenance ladder, and belongs to the technical field of maritime work maintenance ladders. Comprising a climbing ladder assembly used for multiple sites, the climbing ladder assembly comprises a platform, two supporting frames are fixedly connected to the bottom of one end of the platform, a step ladder is rotationally installed at the end, located on the supporting frames, of the platform, two positioning blocks are fixedly connected to the two sides of the other end of the platform, and supporting rods are in threaded connection with the interiors of the two positioning blocks correspondingly. According to the invention, the ladder climbing assembly is arranged, so that the maintenance ladder is suitable for being used in various fields, especially on-board operation, safe, stable and flexible use experience is provided for a user, and meanwhile, the maintenance ladder can be stably placed on an uneven ground through the independent adjusting function of the two supporting rods; the height of each supporting rod can be independently adjusted, which means that the balance of the supporting points can be realized by adjusting the supporting rods no matter how uneven the working surface is, and the structure achieves the flexible use of the maintenance ladder.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering maintenance ladders, in particular to a multifunctional and multi-purpose maintenance ladder. Background Art

[0002] In offshore FPSO projects, daily maintenance and overhaul of equipment and components are essential. To ensure the 25-30 year service life of the entire FPSO oil and gas production project, the FPSO will basically not leave the working area for overhaul. This requires the use of multi-purpose overhaul ladders in the living area to meet the complex and diverse operating environments.

[0003] Maintenance ladders in traditional technology are mostly fixed structures and are not flexible enough to use, which brings many inconveniences in the actual maintenance process. First, the maintenance sites are often of different heights, especially on ships, and the space is limited. Traditional ladders cannot be quickly adjusted according to the working environment, resulting in operators having to use a variety of tools or climb temporary platforms of varying heights, which increases the difficulty and risk of operation. In addition, fixed ladders need to be used under good ground conditions. In narrow or uneven sites, traditional ladders are difficult to place stably, which can easily cause the ladder to tilt or even slip, posing a major safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multifunctional and multi-purpose maintenance ladder to solve the problem that the existing maintenance ladders are not flexible enough in use.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: The lifting of the ladder system as claimed in claim 1, wherein the two support frames are provided with a plurality of support rods, each of which is connected to the support frame by a plurality of locking plates at the bottom of the ladder and is connected to the support frame by a plurality of locking plates at the bottom of the ladder.

[0006] Optionally, a first universal wheel is installed at the bottom of the support frame, a second universal wheel is installed at the bottom end of the step ladder, the bottom end of the support rod is fixedly connected to an anti-sliding block, the anti-sliding block is made of rubber material, the outside of the support rod is provided with a thread, the inside of the positioning block is provided with a thread, the specifications of the external thread of the support rod are matched with the specifications of the internal thread of the positioning block, the top of the support rod is internally slidably connected to a hand rod, the two ends of the hand rod are fixedly connected to ball blocks, and guardrails are fixedly connected around the top of the platform and on both sides of the top of the step ladder.

[0007] Optionally, two guide plates are fixedly connected to one end of the platform, the positions of the two guide plates correspond to the positions of the step ladder, and the spacing between the two guide plates is greater than the width of the step ladder. The width of the step ladder is smaller than the width of the platform, and sliding columns are fixedly connected to both sides of the top of the step ladder. A sliding groove is provided inside the guide plate, and one end of the sliding column away from the step ladder is slidably engaged with the inside of the sliding groove.

[0008] Optionally, the top of the step ladder is fixedly connected to a connecting block, the top of the connecting block is fixedly connected to a first page plate, the top of one end of the heightened plate is fixedly connected to a second page plate, the side of the first page plate away from the connecting block and the side of the second page plate away from the heightened plate are rotatably connected via an axle rod, the bottom of the heightened plate is in contact with the top of the platform when the top of the step ladder contacts one side of the platform, and the bottom of the end where the heightened plate is connected to the step ladder is arc-shaped.

[0009] Optionally, one end of the rotating column passing through the interior of the support frame is fixedly connected to the first driven wheel, one side of the first driven wheel is connected to the first driving wheel through a belt drive, one side of the first driving wheel is fixedly connected to the first worm gear through an axis, the bottom of the platform is fixedly connected to a connecting plate, the side of the first worm gear away from the first driving wheel is rotatably connected to one side of the connecting plate through an axis, one side of the top of the connecting plate is fixedly connected to a fixing block, one side of the first worm gear is meshedly connected to the first worm, the top of the first worm gear is fixedly connected to a rotating wheel through a shaft passing through the interior of the fixing block, the interior of the rotating wheel is slidably connected to an insertion rod, the top of the fixing block is annularly provided with a plurality of positioning holes equidistantly, the positions of the plurality of positioning holes respectively correspond to the positions of the insertion rods, and the bottom end of the insertion rod passes through the interior of the rotating wheel and is slidably connected to the interior of the positioning holes.

[0010] Optionally, the supporting assembly includes four fixed cylinders fixedly connected to the bottom of the platform, the opposite sides of the four fixed cylinders correspond to each other, and the four fixed cylinders are located on one side between the two second connecting plates, and the top of the fixed cylinder is slidably clamped with a lifting rod, and the positions of the tops of the four lifting rods correspond to the positions of the heightening plate, and four through holes are opened inside the platform, and the tops of the four lifting rods respectively pass through the inside of the through holes and contact the bottom of the heightening plate.

[0011] Optionally, a fixing plate is fixedly connected to the bottom between the four fixing cylinders, and two brackets are fixedly connected to the top of the fixing plate, and the interior of the bracket is rotatably connected to a second worm gear through an axis, and the interior of the second worm gear is fixedly connected to a toggle column, and both ends of the toggle column are fixedly connected to a linkage plate, and a movable groove is opened on both sides of the fixing cylinder, and the bottom end of the lifting rod is fixedly connected to a U-shaped card, and the interior of the U-shaped card is fixedly connected to a linkage column, and the end of the linkage plate away from the toggle column is fixedly connected to the U-shaped plate, and the end of the U-shaped plate away from the linkage plate passes through the interior of the movable groove, and the interior of the U-shaped plate is slidably connected to the outside of the linkage column, and the specifications and dimensions of the U-shaped groove inside the U-shaped plate are adapted to the specifications and dimensions of the linkage column.

[0012] Optionally, the top end of the fixing plate is rotatably connected to a second worm gear via an axis, and two sides of the second worm gear are respectively meshed and connected with opposite sides of two second worm wheels.

[0013] Optionally, the bottom end of the second worm is fixedly connected to a second driven wheel via a shaft passing through the interior of the fixed plate, one side of the second driven wheel is connected to a second driving wheel via a belt drive, a circular hole is provided on the top of the platform, and the top of the second driving wheel is fixedly connected to an adjusting wheel via a shaft passing through the interior of the circular hole, and the height of the top of the adjusting wheel is lower than the height of the top of the circular hole.

[0014] Optionally, the circular hole has a plurality of adjustment holes in a ring shape, the adjusting wheel has a socket, the top of the adjusting wheel is fixedly connected to two first support plates, the two first support plates are located on both sides of the socket, one side of the two first support plates is rotatably connected to the second support plate via an axis, the top of the second support plate is fixedly connected to a sleeve, the inside of the sleeve is slidably connected to a plug post, the bottom end of the plug post passes through the inside of the socket and is connected to the inside of the adjusting hole, the length of the plug post is smaller than the diameter of the circular hole, and the height of the top of the plug post is lower than the height of the top of the circular hole when one side of the plug post contacts the top of the adjusting wheel.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a ladder assembly, the maintenance ladder is suitable for use in a variety of venues, especially on-board operations, providing users with a safe, stable and flexible use experience. First of all, since the maintenance ladder adopts a support frame and a step ladder to form a stable triangular structure, and two support rods are used to support the platform, the stability is further increased. At the same time, the independent adjustment function of the two support rods allows the maintenance ladder to be stably placed on uneven ground (such as benches, uneven boxes, etc.), and the height of each support rod can be adjusted individually, which means that no matter how uneven the working surface is, the support point can be balanced by adjusting the support rod. This structure not only achieves the flexible use of the maintenance ladder, but also avoids shaking or tilting caused by unbalanced support, ensuring safety during operation. This design enables the maintenance ladder to have excellent adaptability on various uneven surfaces, avoiding the limitations of traditional ladders, and is an efficient and reliable maintenance tool.

[0016] By setting a retraction assembly, the retraction assembly is composed of a rotating column between the first and second connecting plates and the support frame connected to the bottom of the step ladder. By rotating the rotating column, the operator can retract the step ladder to one side of the platform. In this way, when the maintenance ladder is used in a narrow space of the hull, the step ladder can be retracted, and the platform can be supported and used by using two support frames and two support rods. This avoids affecting the operation of other equipment on the ship due to the maintenance ladder being too large. At the same time, when the step ladder retracts one side of the platform, the heightening plate is rotated to a state perpendicular to the top of the step ladder through the action of the shaft rod. At this time, the heightening plate will be parallel to the platform. This can increase the height of the platform, prompting the operators to use it at a higher place, thereby further increasing the flexibility of the maintenance ladder.

[0017] By setting up a support assembly, when the heightened plate is parallel to the platform, the second worm gear can be rotated to cause the lifting rod to rise, thereby causing the top of the lifting rod to support the bottom of the heightened plate, thereby making it convenient for operators to stand on the top of the heightened plate to work, thereby providing additional stability to the heightened plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall side-view stereoscopic structure of the present invention; Figure 3 It is another visual structural schematic diagram of the present invention as a whole; Figure 4This is a schematic diagram of the step ladder of the present invention being collapsed; Figure 5 It is a schematic diagram of the three-dimensional structure of the shrinking component of the present invention; Figure 6 It is a schematic diagram of a three-dimensional structure of a portion of a support assembly of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the cross-sectional structure from the side; Figure 8 This is a schematic diagram of the post contraction of the present invention; Fig. 9 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1, platform; 2, support frame; 3, connecting block; 4, first page plate; 5, second page plate; 6, shaft; 7, heightening plate; 8, guide plate; 9, slide groove; 10, slide column; 11, step ladder; 12, first universal wheel; 13, second universal wheel; 14, guardrail; 15, first connecting plate; 16, second connecting plate; 17, rotating column; 18, first driven wheel; 19, first driving wheel; 20, first worm wheel; 21, first worm; 22, fixing block; 23, positioning hole; 24, rotating wheel; 25, plug rod; 26, positioning block; 27, support rod; 28, hand lever; 29, anti-sliding block; 30, fixing cylinder; 31, lifting rod; 32, moving groove; 33, fixing plate; 34, bracket; 35, second worm gear; 36, second worm; 37, toggle column; 38, U-shaped card; 39, linkage column; 40, linkage plate; 41, U-shaped plate; 42, second driven wheel; 43, second driving wheel; 44, circular hole; 45, adjusting wheel; 46, first support plate; 47, second support plate; 48, sleeve; 49, plug column.

[0021] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0022] The following is a detailed description of the multifunctional and multi-purpose maintenance ladder provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0023] like Figures 1 to 9As shown, the embodiment of the present invention provides a multifunctional and multi-purpose maintenance ladder, including a ladder assembly for use in multiple venues, the ladder assembly includes a platform 1, two support frames 2 are fixedly connected to the bottom of one end of the platform 1, a step ladder 11 is rotatably installed at one end of the platform 1 located at the support frame 2, two positioning blocks 26 are fixedly connected to both sides of the other end of the platform 1, and the insides of the two positioning blocks 26 are respectively threadedly connected to support rods 27, and a retracting assembly for retracting the step ladder 11 and increasing the height of the platform 1 is provided on one side of the platform 1, and the retracting assembly includes a shaft rotatably connected to the step ladder 11 through an axis. The first connecting plates 15 on both sides of the bottom of 11, the end of the first connecting plate 15 away from the step ladder 11 is rotatably connected to the second connecting plate 16 through an axis, a rotating column 17 is rotatably connected between the tops of the two support frames 2, the ends of the two second connecting plates 16 away from the first connecting plate 15 are fixedly connected to the outside of the rotating column 17, and the side corresponding to the connection between the two first connecting plates 15 and the two second connecting plates 16 is rotatably connected to a connecting rod, a heightening plate 7 is installed on one side of the top of the step ladder 11, and a support assembly is installed at the bottom of the platform 1, and the support assembly is used to support the heightening plate 7 when the heightening plate 7 is raised; By setting up the climbing ladder assembly, the maintenance ladder is suitable for use in a variety of venues, especially on-board operations, providing users with a safe, stable and flexible use experience. First of all, since the maintenance ladder adopts the support frame 2 and the step ladder 11 to form a stable triangular structure, and two support rods 27 are used to support the platform 1, the stability is further increased. At the same time, the independent adjustment function of the two support rods 27 is set, the maintenance ladder can be stably placed on uneven ground such as benches, uneven boxes, etc., and each support rod 27 can be adjusted in height individually, which means that no matter how uneven the working surface is, the support point can be balanced by adjusting the support rods 27. This structure not only achieves the flexible use of the maintenance ladder, but also avoids shaking or tilting caused by unbalanced support, ensuring safety during operation. This design enables the maintenance ladder to have excellent adaptability on various uneven surfaces, avoiding the limitations of traditional ladders, and is an efficient and reliable maintenance tool.

[0024] like Figures 1 to 5 As shown, a first universal wheel 12 is installed at the bottom of the support frame 2, a second universal wheel 13 is installed at the bottom end of the step ladder 11, an anti-sliding block 29 is fixedly connected to the bottom end of the support rod 27, and the anti-sliding block 29 is made of rubber material. The outside of the support rod 27 is provided with a thread, and the inside of the positioning block 26 is provided with a thread. The specification of the external thread of the support rod 27 is adapted to the specification of the internal thread of the positioning block 26. A hand rod 28 is slidably connected to the inside of the top of the support rod 27, and ball blocks are fixedly connected to both ends of the hand rod 28. Guardrails 14 are fixedly connected around the top of the platform 1 and on both sides of the top of the step ladder 11; By setting the first universal wheel 12 and the second universal wheel 13, when using the maintenance ladder, first push the support frame 2, so that the platform 1 and the step ladder 11 move with the movement of the universal wheel, thereby facilitating the pushing of the maintenance ladder. Figure 1 and Figure 2 In the scenario, the hand lever 28 can be rotated to cause the support rod 27 to move downward by means of the thread. At this time, the bottom of the anti-sliding block 29 contacts the top of the obstacle, so that the platform 1 is supported by the balance point, and the maintenance ladder is made closer to the wall or used on the top of the obstacle, thereby increasing the stability of the maintenance ladder while increasing the flexibility of the maintenance ladder. At the same time, the material of the anti-sliding block 29 is set to be a rubber anti-sliding block 29, thereby providing the ladder body with excellent anti-slip performance, whether on slippery surfaces such as metal and tiles or on uneven ground, it can effectively prevent slipping and ensure the stability of the support. It should be noted here that the first universal wheel 12 and the second universal wheel 13 are universal wheels with brake pads, thereby avoiding the problem of shaking when using the ladder body. At the same time, the safety of the staff is increased by setting the guardrail 14.

[0025] like Figures 2 to 5 As shown, one end of the platform 1 is fixedly connected with two guide plates 8, the positions of the two guide plates 8 correspond to the positions of the step ladder 11, and the spacing between the two guide plates 8 is greater than the width of the step ladder 11, and the width of the step ladder 11 is smaller than the width of the platform 1, and the two sides of the top of the step ladder 11 are respectively fixedly connected with sliding columns 10, and a slide groove 9 is opened inside the guide plate 8, and the end of the sliding column 10 away from the step ladder 11 is slidably engaged with the inside of the slide groove 9, and the top of the step ladder 11 is fixedly connected with a connecting block 3, and the top of the connecting block 3 is fixedly connected with a first page plate 4, and the top of one end of the heightening plate 7 is fixedly connected with a second page plate 5, and the side of the first page plate 4 away from the connecting block 3 and the side of the second page plate 5 away from the heightening plate 7 are rotatably connected by an axle rod 6. When the top of the step ladder 11 contacts one side of the platform 1, the bottom of the heightening plate 7 contacts the top of the platform 1, and the bottom of the connecting end of the heightening plate 7 and the step ladder 11 is arc-shaped; The retracting assembly is provided, which is composed of a rotating column 17 connected between the first and second connecting plates 16 at the bottom of the step ladder 11 and the support frame 2. By rotating the rotating column 17, the operator can retract the step ladder 11 to one side of the platform 1. In this way, when the maintenance ladder is used in a narrow space of the hull, the step ladder 11 can be retracted, and the two support frames 2 and the two support rods 27 are used to support the platform 1. This avoids affecting the operation of other equipment on the ship due to the maintenance ladder being too large. At the same time, when the step ladder 11 retracts one side of the platform 1, the heightening plate 7 is rotated to a position vertically aligned with the top of the step ladder 11 through the action of the shaft rod 6. When the ladder is in a narrow space on board, the second connecting plate 16 is rotated to move the first connecting plate 15 to the bottom of the platform 1. At this time, the bottom end of the step ladder 11 will slide to the bottom of the platform 1 through the second universal wheel 13, and the top of the step ladder 11 will slide inside the slide groove 9 through the slide column 10, thereby causing the step ladder 11 to be vertically parallel to one side of the platform 1. Figure 4 As shown, the lateral space is reduced, thereby preventing the ladder from obstructing the use of other equipment when in use. At the same time, by setting the bottom of one end of the heightening plate 7 to be arc-shaped, when the step ladder 11 is vertically parallel to one side of the platform 1, the heightening plate 7 is connected to the step ladder 11 through the shaft rod 6, and the heightening plate 7 will rotate. When the heightening plate 7 is rotated to be parallel to the platform 1, the arc-shaped side of the bottom of the heightening plate 7 is just stuck on the top of the connecting block 3, thereby prompting the heightening plate 7 to be fixed parallel to the top of the platform 1, thereby facilitating the use of the heightening plate 7 after supporting it in the later stage, thereby prompting the staff to work at a higher place. At the same time, by setting the width of the heightening plate 7 and the step ladder 11, when the step ladder 11 is retracted to one side of the platform 1, the heightening plate 7 is parallel to the top of the platform 1, as shown in FIG. Figure 4 As shown, sufficient space can be reserved on the top of the platform 1 for use by workers, thereby avoiding the problem of the step ladder 11 and the heightening plate 7 interfering with the work.

[0026] like Figures 1 to 9As shown, one end of the rotating column 17 passing through the interior of the support frame 2 is fixedly connected to the first driven wheel 18, one side of the first driven wheel 18 is connected to the first driving wheel 19 through a belt drive, one side of the first driving wheel 19 is fixedly connected to the first worm gear 20 through an axis, the bottom of the platform 1 is fixedly connected to a connecting plate, the side of the first worm gear 20 away from the first driving wheel 19 is rotatably connected to one side of the connecting plate through an axis, one side of the top of the connecting plate is fixedly connected to a fixed block 22, one side of the first worm gear 20 is meshingly connected to the first worm 21, the top of the first worm gear 21 is fixedly connected to a rotating wheel 24 through an axis passing through the interior of the fixed block 22, the interior of the rotating wheel 24 is slidably connected to an insertion rod 25, the top of the fixed block 22 is annularly provided with a plurality of positioning holes 23 at equal intervals, the positions of the plurality of positioning holes 23 respectively correspond to the positions of the insertion rod 25, the bottom end of the insertion rod 25 passes through the interior of the rotating wheel 24 and is slidably connected to the interior of the positioning hole 23; By means of the provided rotating wheel 24 and the fixing block 22, when the rotating column 17 is rotated, the bottom of the insert rod 25 is first pulled out from the inside of the positioning hole 23. At this time, the rotating wheel 24 is rotated to cause the first worm 21 to rotate with the first driving wheel 19, and at the same time, the first driven wheel 18 rotates with the rotating column 17, thereby causing the step ladder 11 to retract to one side of the platform 1. By means of the provided insert rod 25, the position of the step ladder 11 can be fixed. When positioning the position of the step ladder 11, the insert rod 25 is first passed through the inside of the rotating wheel 24 and connected with the inside of the positioning hole 23. At this time, the position of the rotating column 17 will be limited, thereby ensuring the stability of the step ladder 11 when in use. At the same time, by means of the provided first driven wheel 18 and the first driving wheel 19, the transmission structure is placed more reasonably, thereby facilitating the work of the staff on the platform 1.

[0027] like Figures 4 to 7As shown, the support assembly includes four fixed cylinders 30 fixedly connected to the bottom of the platform 1, and the opposite sides of the four fixed cylinders 30 correspond to each other, and the positions of the four fixed cylinders 30 are located on one side between the two second connecting plates 16. The top of the fixed cylinder 30 is internally slidably connected with a lifting rod 31, and the position of the top of the four lifting rods 31 corresponds to the position of the heightening plate 7. Four through holes are opened inside the platform 1, and the tops of the four lifting rods 31 respectively penetrate the inside of the through holes and contact the bottom of the heightening plate 7. The bottom between the four fixed cylinders 30 is fixedly connected with a fixing plate 33, and the top of the fixing plate 33 is fixedly connected with two brackets 34. The inside of the bracket 34 is through A second worm gear 35 is rotatably connected through the shaft, a toggle column 37 is fixedly connected inside the second worm gear 35, and linkage plates 40 are fixedly connected to both ends of the toggle column 37, respectively. A moving groove 32 is provided on both sides of the fixed cylinder 30, a U-shaped card 38 is fixedly connected to the bottom end of the lifting rod 31, and a linkage column 39 is fixedly connected inside the U-shaped card 38, and a U-shaped plate 41 is fixedly connected to one end of the linkage plate 40 away from the toggle column 37, and one end of the U-shaped plate 41 away from the linkage plate 40 passes through the inside of the moving groove 32, and the inside of the U-shaped plate 41 is slidably connected to the outside of the linkage column 39, and the specifications and dimensions of the U-shaped groove inside the U-shaped plate 41 are adapted to the specifications and dimensions of the linkage column 39; By setting the support assembly, when the heightened plate 7 is parallel to the platform 1, the second worm 36 can be rotated to cause the lifting rod 31 to rise, thereby causing the top of the lifting rod 31 to support the bottom of the heightened plate 7, thereby facilitating the operator to stand on the top of the heightened plate 7 to work, thereby providing additional stability to the heightened plate 7. When the heightened plate 7 is parallel to the top of the platform 1, as shown in FIG. Figure 4 As shown, the second worm 36 is rotated at this time, as shown in FIG. Figure 6 As shown, the second worm 36 will drive the two second worm wheels 35 to rotate, and at the same time, the two ends of the two toggle columns 37 will drive the linkage plate 40 to rotate. At this time, the U-shaped plate 41 will toggle the linkage column 39 to move upward, thereby prompting the linkage column 39 to move upward with the lifting rod 31, thereby prompting the top of the lifting rod 31 to pass through the through hole and contact the bottom of the heightening plate 7. Later, by positioning the position of the lifting rod 31, the lifting rod 31 is prompted to support the heightening plate 7, thereby facilitating the work of the staff on the heightening plate 7, and at the same time prompting the staff to work at a higher place.

[0028] like Figures 1 to 8As shown, the top of the fixed plate 33 is rotatably connected to a second worm 36 through an axis, and the two sides of the second worm 36 are respectively meshed and connected with the opposite sides of the two second worm wheels 35. The bottom end of the second worm 36 is fixedly connected to a second driven wheel 42 through an axis passing through the interior of the fixed plate 33, and one side of the second driven wheel 42 is connected to a second driving wheel 43 through a belt drive. A circular hole 44 is provided on the top of the platform 1, and an adjusting wheel 45 is fixedly connected to the top of the second driving wheel 43 through an axis passing through the interior of the circular hole 44. The height of the top of the adjusting wheel 45 is lower than the height of the top of the circular hole 44, and the interior of the circular hole 44 is provided with a plurality of annular An adjustment hole, an insertion hole is provided inside the adjustment wheel 45, and two first support plates 46 are fixedly connected to the top of the adjustment wheel 45, and the positions of the two first support plates 46 are located on both sides of the insertion hole, and one side of the two first support plates 46 is respectively connected to the second support plate 47 through an axis rotation, and the top of the second support plate 47 is fixedly connected to a sleeve 48, and the inside of the sleeve 48 is slidably connected to a plug post 49, and the bottom end of the plug post 49 passes through the inside of the insertion hole and is connected to the inside of the adjustment hole, and the length of the plug post 49 is smaller than the diameter of the circular hole 44, and when one side of the plug post 49 contacts the top of the adjustment wheel 45, the height of the top of the plug post 49 is lower than the height of the top of the circular hole 44; By providing the second worm 36 and the two second worm wheels 35, the second worm 36 is driven to rotate, so as to simultaneously drive the four lifting rods 31 to support the heightened plate 7 upward, thereby facilitating the support of the heightened plate 7 and also facilitating the use of the staff. At the same time, by providing the adjusting wheel 45, when the second worm 36 is rotated, the adjusting wheel 45 is first rotated to cause the second driving wheel 43 to rotate with the second driven wheel 42, and at the same time, the second driven wheel 42 rotates with the second worm 36, thereby achieving the effect of raising the lifting rod 31. By providing the second driven wheel 42 and the second driving wheel 43, the transmission assembly can be placed more reasonably, thereby facilitating the use of the staff. At the same time, by providing the circular hole 44 and the plug post 4 9. When positioning the second worm gear 36, first rotate the sleeve 48 to a position vertical to the adjusting wheel 45. Then, pass the plug post 49 through the sleeve 48 and the inside of the adjusting wheel 45 to connect with the inside of the adjusting hole in the circular hole 44, thereby fixing the position of the second worm gear 36. At the same time, the position of the lifting rod 31 supporting the heightening plate 7 is fixed, thereby facilitating the support of the lifting rod 31 for the heightening plate 7. At the same time, when the staff reaches the top of the platform 1 later and does not need to retract the step ladder 11 and use the heightening plate 7, the plug post 49 can be pulled out of the adjusting hole, and at the same time, one side of the plug post 49 can be rotated to contact the top of the adjusting wheel 45, thereby causing the plug post 49 to be hidden inside the circular hole 44, thereby facilitating the work of the staff on the platform 1.

[0029] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional and multi-purpose maintenance ladder, characterized in that: The invention comprises a ladder assembly for use in multiple venues, the ladder assembly comprising a platform (1), the bottom of one end of the platform (1) being fixedly connected to two support frames (2), the platform (1) being rotatably mounted with a step ladder (11) at one end of the support frame (2), two positioning blocks (26) being fixedly connected to both sides of the other end of the platform (1), the interiors of the two positioning blocks (26) being respectively threadedly connected to support rods (27), the bottom ends of the support rods (27) being fixedly connected to anti-sliding blocks (29), the anti-sliding blocks (29) being made of rubber material, the exterior of the support rods (27) being provided with threads, the interior of the positioning blocks (26) being provided with threads, the specifications of the external threads of the support rods (27) being compatible with the specifications of the internal threads of the positioning blocks (26), the interior of the top end of the support rods (27) being slidably connected to a hand rod (28), the two ends of the hand rod (28) being fixedly connected to A ball block is provided; a retracting assembly for retracting the step ladder (11) and increasing the height of the platform (1) is provided on one side of the platform (1); the retracting assembly comprises a first connecting plate (15) rotatably connected to both sides of the bottom of the step ladder (11) via an axis, one end of the first connecting plate (15) away from the step ladder (11) is rotatably connected to a second connecting plate (16) via an axis, a rotating column (17) is rotatably connected between the tops of the two support frames (2), one end of the two second connecting plates (16) away from the first connecting plate (15) is fixedly connected to the outside of the rotating column (17), and a connecting rod is rotatably connected to one side corresponding to the connection between the two first connecting plates (15) and the two second connecting plates (16), and a heightening plate (7) is installed on one side of the top of the step ladder (11); a supporting assembly is installed at the bottom of the platform (1), and the supporting assembly is used to support the heightening plate (7) when the heightening plate (7) is raised.

2. The multifunctional and multi-purpose maintenance ladder according to claim 1 is characterized in that: A first universal wheel (12) is installed at the bottom of the support frame (2), a second universal wheel (13) is installed at the bottom end of the step ladder (11), and guardrails (14) are fixedly connected around the top of the platform (1) and on both sides of the top of the step ladder (11).

3. The multifunctional and multi-purpose maintenance ladder according to claim 1 is characterized in that: One end of the platform (1) is fixedly connected to two guide plates (8), the positions of the two guide plates (8) correspond to the positions of the step ladder (11), and the spacing between the two guide plates (8) is greater than the width of the step ladder (11), and the width of the step ladder (11) is smaller than the width of the platform (1), and sliding columns (10) are fixedly connected to both sides of the top of the step ladder (11), and a sliding groove (9) is provided inside the guide plate (8), and one end of the sliding column (10) away from the step ladder (11) is slidably engaged with the inside of the sliding groove (9).

4. The multifunctional and multi-purpose maintenance ladder according to claim 3 is characterized in that: The top of the step ladder (11) is fixedly connected to a connecting block (3), the top of the connecting block (3) is fixedly connected to a first page plate (4), the top of one end of the heightened plate (7) is fixedly connected to a second page plate (5), the side of the first page plate (4) away from the connecting block (3) and the side of the second page plate (5) away from the heightened plate (7) are rotatably connected via an axle rod (6), when the top of the step ladder (11) contacts one side of the platform (1), the bottom of the heightened plate (7) contacts the top of the platform (1), and the bottom of the end where the heightened plate (7) and the step ladder (11) are connected is in an arc shape.

5. The multifunctional and multi-purpose maintenance ladder according to claim 1, characterized in that: One end of the rotating column (17) passing through the interior of the support frame (2) is fixedly connected to a first driven wheel (18); one side of the first driven wheel (18) is connected to a first driving wheel (19) via a belt drive; one side of the first driving wheel (19) is fixedly connected to a first worm wheel (20) via a shaft; a connecting plate is fixedly connected to the bottom of the platform (1); a side of the first worm wheel (20) away from the first driving wheel (19) is rotatably connected to one side of the connecting plate via a shaft; a fixing block (22) is fixedly connected to one side of the top of the connecting plate; and the first A first worm (21) is meshingly connected to one side of a worm wheel (20); the top of the first worm (21) is fixedly connected to a rotating wheel (24) via an axis passing through the interior of a fixed block (22); an insertion rod (25) is slidably connected to the interior of the rotating wheel (24); a plurality of positioning holes (23) are equidistantly arranged in a ring shape on the top of the fixed block (22); the positions of the plurality of positioning holes (23) respectively correspond to the positions of the insertion rod (25); and the bottom end of the insertion rod (25) passes through the interior of the rotating wheel (24) and is slidably connected to the interior of the positioning holes (23).

6. The multifunctional and multi-purpose maintenance ladder according to claim 1, characterized in that: The support assembly comprises four fixed cylinders (30) fixedly connected to the bottom of the platform (1), the four fixed cylinders (30) having opposite sides corresponding to each other, and the four fixed cylinders (30) are located on one side between the two second connecting plates (16), the top of the fixed cylinder (30) is internally slidably engaged with a lifting rod (31), the top positions of the four lifting rods (31) correspond to the positions of the heightening plate (7), the platform (1) is provided with four through holes, and the tops of the four lifting rods (31) respectively penetrate the inside of the through holes and contact the bottom of the heightening plate (7).

7. The multifunctional and multi-purpose maintenance ladder according to claim 6, characterized in that: A fixing plate (33) is fixedly connected to the bottom between the four fixing cylinders (30), two brackets (34) are fixedly connected to the top of the fixing plate (33), a second worm gear (35) is rotatably connected to the inside of the bracket (34) via an axis, a toggle column (37) is fixedly connected to the inside of the second worm gear (35), and both ends of the toggle column (37) are respectively fixedly connected to a linkage plate (40), and movable grooves (32) are provided on both sides of the fixing cylinder (30), and the lifting rod (31) is The bottom end is fixedly connected to a U-shaped card (38), the interior of the U-shaped card (38) is fixedly connected to a linkage column (39), one end of the linkage plate (40) away from the toggle column (37) is fixedly connected to a U-shaped plate (41), one end of the U-shaped plate (41) away from the linkage plate (40) passes through the interior of the movable groove (32), the interior of the U-shaped plate (41) is slidably connected to the exterior of the linkage column (39), and the specifications and dimensions of the U-shaped groove inside the U-shaped plate (41) are compatible with the specifications and dimensions of the linkage column (39).

8. The multifunctional and multi-purpose maintenance ladder according to claim 7, characterized in that: The top end of the fixing plate (33) is rotatably connected to a second worm (36) via an axis, and two sides of the second worm (36) are respectively meshed and connected with opposite sides of two second worm wheels (35).

9. The multifunctional and multi-purpose maintenance ladder according to claim 8, characterized in that: The bottom end of the second worm gear (36) is fixedly connected to a second driven wheel (42) via a shaft passing through the interior of the fixed plate (33); one side of the second driven wheel (42) is connected to a second driving wheel (43) via a belt drive; a circular hole (44) is provided on the top of the platform (1); the top of the second driving wheel (43) is fixedly connected to an adjusting wheel (45) via a shaft passing through the interior of the circular hole (44); the height of the top of the adjusting wheel (45) is lower than the height of the top of the circular hole (44).

10. The multifunctional and multi-purpose maintenance ladder according to claim 9, characterized in that: The circular hole (44) is provided with a plurality of adjustment holes in an annular shape inside, the adjustment wheel (45) is provided with an insertion hole inside, the top of the adjustment wheel (45) is fixedly connected to two first support plates (46), the positions of the two first support plates (46) are located on both sides of the insertion hole, one side of the two first support plates (46) is respectively connected to a second support plate (47) through an axis, the top of the second support plate (47) is fixedly connected to a sleeve (48), the inside of the sleeve (48) is slidably connected to a plug post (49), the bottom end of the plug post (49) passes through the inside of the insertion hole and is connected to the inside of the adjustment hole, the length of the plug post (49) is smaller than the diameter of the circular hole (44), and when one side of the plug post (49) contacts the top of the adjustment wheel (45), the height of the top of the plug post (49) is lower than the height of the top of the circular hole (44).

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