Movable lifting working platform
By designing a mobile lifting work platform, and adopting guardrails, a rotating door, a lifting device, and adjustable outriggers, the safety hazards and mobility problems of aerial work platforms have been solved, achieving stability and flexibility of the platform to adapt to various operational needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGONG IND VEHICLES (SHANDONG) CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Existing aerial work platforms pose safety hazards, such as a lack of guardrails, large gaps in platform connections, and difficulty in movement, which increases operational risks and labor intensity.
Design a mobile lifting work platform, comprising a platform body and a detachable extension platform, equipped with guardrails and a rotating door. The lifting device consists of multiple gantry bodies, driven by hydraulic cylinders and chain transmission to lift the platform. The chassis has wheels and a drive unit for easy movement, and the outriggers are adjustable to maintain platform stability.
It improves the safety and flexibility of the work platform, prevents falls, reduces the difficulty of movement, enhances the stability and load-bearing capacity of the platform, and adapts to different work sites.
Smart Images
Figure CN224147685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting work platform technology, specifically to a mobile lifting work platform. Background Technology
[0002] Aerial work platforms, as key equipment in modern industry and various engineering projects, are widely used in many industries such as construction, power maintenance, warehousing and logistics, and municipal maintenance, undertaking important tasks such as high-altitude operations, equipment installation, and maintenance. With their high mobility, they greatly improve the efficiency and convenience of high-altitude operations, becoming an essential tool for ensuring the smooth progress of various high-altitude projects.
[0003] Currently, existing aerial work platforms on the market pose a series of significant safety hazards. Firstly, they often lack adequate safety railings. During actual operation, operators frequently need to move materials and operate equipment. If their attention is diverted or they encounter sudden swaying, without effective railing protection, they are highly susceptible to falling from a height, causing serious personal injury or death. Secondly, the design of the connection between the platform body and extension platforms is inadequate, with gaps generally being too large. When operators need to switch between different platform areas, a slight misstep could cause them to step into the gap, lose their balance, and fall, posing a significant threat to their lives.
[0004] Furthermore, existing aerial work platforms are typically quite heavy. In scenarios requiring frequent changes of work location, such as small-scale construction and renovation projects or temporary power repairs, manual movement of the platform is often necessary. However, the excessive weight of the machine makes this operation extremely difficult, significantly increasing the workload for workers. This not only consumes a large amount of manpower but also increases the risk of operational errors due to overexertion, further impacting the safety and efficiency of the operation. These problems severely restrict the widespread application and industry development of aerial work platforms and urgently require solutions through technological innovation. Utility Model Content
[0005] To address the technical problems of workers easily falling from existing aerial work platforms, the high operational risks, and the excessive labor intensity when moving the entire machine, this utility model provides a mobile aerial work platform.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A mobile lifting work platform includes a working platform with two structural states during operation. In the first structural state, the working platform includes a platform body and an extension platform, with one side of the platform body detachably connected to the extension platform. In the second structural state, the working platform consists only of the platform body. In the first structural state, a guardrail and a rotating door are installed on the top edge of the combined platform body and extension platform. In the second structural state, the guardrail and rotating door are installed on the top edge of the platform body. One side of the rotating door is rotatably connected to the guardrail, and the other side of the rotating door is locked to the guardrail. Lifting devices are connected to opposite sides of the platform body along its length. The bottoms of the two lifting devices are connected to a common chassis. The bottom of the chassis is equipped with casters and a drive mechanism to rotate the casters.
[0008] The above structural design includes a platform body and an extension platform, which are detachably connected, allowing for easy adjustment of the platform size to suit different operational needs. The guardrails effectively prevent operators from falling from heights, while the revolving door facilitates operator access to and from the platform. Its rotating and locking connection with the guardrails ensures both safety and flexibility. A lifting device connects the platform body and the chassis, enabling the platform to be raised and lowered. The wheels and drive mechanism at the bottom of the chassis facilitate platform movement, allowing it to adapt flexibly to different work sites.
[0009] As a preferred implementation of a mobile lifting work platform, each lifting device includes multiple sets of gantry bodies of the same number, with the gantry bodies on two lifting devices arranged opposite each other; each set of gantry bodies includes two vertically opposite gantry support rods, and the multiple sets of gantry bodies are arranged from the outside to the inside, with the bottom of the outermost gantry body fixedly connected to the chassis, the innermost gantry body connected to the platform body, and adjacent gantry bodies vertically slidingly connected, allowing them to move relative to each other in the vertical direction.
[0010] With the above structural design, each lifting device consists of multiple sets of gantry bodies, and adjacent gantry bodies are vertically slidably connected and can move relative to each other, which makes the lifting device have good stability and flexibility. The platform height can be flexibly adjusted according to the working height requirements. At the same time, the relative arrangement of multiple sets of gantry bodies can evenly bear the weight of the working platform and improve the overall load-bearing capacity of the structure.
[0011] As a preferred implementation of a mobile lifting work platform, starting from the second group of gantry bodies, each group of gantry bodies has two gantry support rods connected to horizontally set crossbars on the side away from the platform body, in the order from the outside to the inside. The crossbars on the second group of gantry bodies are connected to the output end of the hydraulic cylinder, and the bottom of the hydraulic cylinder is fixedly connected to the chassis.
[0012] With the above structural design, the second gantry body can slide vertically up and down relative to the first gantry body under the drive of the hydraulic cylinder.
[0013] As a preferred implementation of a mobile lifting work platform, each crossbar is rotatably connected to two parallel sprockets (S1), and the bottom of each set of gantry body's two gantry support rods is rotatably connected to two opposing and parallel sprockets (B2). Sprockets (S1) and (B2) on the same set of gantry body are arranged vertically opposite each other. Each pair of sprockets (S1) and (B2) on the same set of gantry body is connected to a chain. The chain is connected to the gantry support rod of the next set of gantry body from the outside to the inside via a support plate. The chain on the innermost set of gantry body is connected to the platform body via a support plate. Sprockets (S1), (B2), chain, and support plate are all located between the two gantry support rods of the innermost set of gantry body.
[0014] The above-mentioned structural scheme, with the sprocket one on the crossbar, the sprocket two at the bottom of the gantry support rod, and the chain and support plate, forms a transmission structure. The chain drives the support plate to move through the transmission of sprocket one and sprocket two, which in turn drives the next set of gantry bodies and platform bodies to rise and fall. This ensures the synchronization and stability of the lifting process, keeps the work platform level during the lifting process, and prevents it from tilting.
[0015] As a preferred implementation of a mobile lifting work platform, a protective net is connected between the two gantry support rods of the innermost gantry body, and the two sides of the support plate extend from the gap between the protective net and the gantry support rod to connect with the platform body.
[0016] With the above structural design, the protective net can prevent people or objects from falling through the gaps between the gantry bodies and avoid workers from getting caught in the chains, thus providing a safety protection function. The support plates extend from the gaps between the protective net and the gantry support rods on both sides to connect with the platform body, which not only ensures the support plate's support function for the platform body but also does not affect the installation and function of the protective net, while making the structure more compact.
[0017] As a preferred implementation of a mobile lifting work platform, the chassis has two outrigger fixing tubes connected to opposite sides in the length direction. The outrigger fixing tubes are parallel to the width direction of the chassis. Each outrigger fixing tube has an extension outrigger slidably connected inside. The extension outriggers on the same side extend out of the corresponding outrigger fixing tubes in opposite directions. One end of the extension outrigger extending out of the outrigger fixing tube is vertically threaded to a threaded support rod, and the bottom of the threaded support rod is connected to a foot.
[0018] With the above structural design, after the chassis is moved to the working position, the height of the outriggers can be adjusted by adjusting the extension length of the outriggers and rotating the threaded support rod, so that the working platform remains level and stably supported on the ground, improving the stability of the working platform during operation and preventing the working platform from shaking or tipping over due to uneven ground or external forces.
[0019] As a preferred implementation of a mobile lifting work platform, the extended legs have several limiting holes along the width of the chassis, and the leg fixing tube is connected to a limiting pin that can be inserted into the leg fixing tube. The limiting pin is compatible with the limiting holes.
[0020] By adopting the above structural design, the extension length of the outriggers can be precisely controlled by inserting limit pins into different limit holes, thereby adapting to different work sites and ground conditions, ensuring the stability and safety of the platform, and also allowing operators to quickly adjust the outriggers according to the actual situation.
[0021] As a preferred implementation of a mobile lifting work platform, a level sensor is installed on the chassis, and a leg ground contact sensor switch is installed on the outrigger fixing tube.
[0022] With the above structural design, the horizontal sensor can monitor the horizontal status of the work platform in real time, and the outrigger ground contact sensor switch can detect whether the extended outrigger is on the ground and in a stable support state.
[0023] As a preferred implementation of a mobile lifting work platform, the chassis has two rotatably connected wheels on one side along its length, and one rotatably connected wheel on the other side, which is connected to a drive unit capable of driving the wheel. The chassis is connected to a control handle, which is located above the drive unit.
[0024] The above structural design makes the platform flexible in movement, easy to turn and control.
[0025] As a preferred implementation of a mobile lifting work platform, a connecting rod is connected between each set of gantry bodies that are positioned opposite each other on the two lifting devices.
[0026] The above structural design enhances the connection strength and stability between the two lifting devices, making their coordinated operation more stable and further improving the overall stability and reliability of the work platform during the lifting process. Attached Figure Description
[0027] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a first three-dimensional structural diagram of a mobile lifting work platform according to a specific embodiment of the present utility model;
[0029] Figure 2 This is a second three-dimensional structural diagram of a mobile lifting work platform according to a specific embodiment of the present utility model;
[0030] Figure 3 This is a third-dimensional structural diagram of a mobile lifting work platform according to a specific embodiment of the present utility model;
[0031] Figure 4 This is a side view of the gantry body in a specific embodiment of the present invention.
[0032] List of components and reference numerals:
[0033] 1. Platform body; 2. Extension platform; 3. Guardrail; 4. Revolving door; 5. Lifting device; 51. Gantry body; 52. Gantry support rod; 53. Crossbar; 54. Hydraulic cylinder; 55. Sprocket 1; 56. Sprocket 2; 57. Chain; 58. Support plate; 6. Chassis; 7. Casters; 8. Driver; 9. Protective net; 10. Outrigger fixing tube; 11. Extension outrigger; 12. Threaded support rod; 13. Outrigger; 14. Limit pin; 15. Horizontal sensor; 16. Outrigger ground contact switch; 17. Control handle; 18. Linkage rod. Detailed Implementation
[0034] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] Reference Figure 1-4 This embodiment proposes a mobile lifting work platform, including a working platform. The working platform has two structural states during operation. In the first structural state, the working platform includes a platform body 1 and an extension platform 2, with one side of the platform body 1 detachably connected to the extension platform 2 in the width direction. In the second structural state, the working platform includes only the platform body 1. In the first structural state, a guardrail 3 and a rotating door 4 are detachably installed on the top edge of the combined platform body 1 and extension platform 2. In the second structural state, the guardrail 3 and the rotating door 4 are detachably installed on the top edge of the platform body 1.
[0036] One side of the revolving door 4 is rotatably connected to the guardrail 3, and the other side of the revolving door 4 is locked to the guardrail 3. Workers can enter the work platform through the revolving door 4 after the work platform is lowered to its lowest position, and lock the revolving door 4 when performing high-altitude operations.
[0037] Lifting devices 5 are connected to opposite sides of the platform body 1 along its length. The bottoms of the two lifting devices 5 are connected to a chassis 6. The bottom of the chassis 6 is equipped with casters 7 and a driver 8 that can drive the casters 7 to rotate.
[0038] Each lifting device 5 includes multiple sets of gantry bodies 51 of the same number, as shown in the reference. Figure 1-2 In this embodiment, each lifting device 5 includes four sets of gantry bodies 51, and the gantry bodies 51 on two lifting devices 5 are arranged opposite each other. Each set of gantry bodies 51 includes two vertically opposite gantry support rods 52. The multiple sets of gantry bodies 51 are arranged from the outside to the inside. The bottom of the outermost gantry body 51 is fixedly connected to the chassis 6, and the innermost gantry body 51 is connected to the platform body 1. Adjacent gantry bodies 51 are vertically slidably connected, and adjacent gantry bodies 51 can move relative to each other in the vertical direction.
[0039] Starting from the second group of gantry bodies 51, each group of gantry bodies 51 has two gantry support rods 52 connected to a horizontally arranged crossbar 53 on the side away from the platform body 1.
[0040] The crossbar 53 on the second gantry body 51 is connected to the output end of the hydraulic cylinder 54, and the bottom of the hydraulic cylinder 54 is fixedly connected to the chassis 6.
[0041] Each crossbar 53 is rotatably connected to two parallel sprockets 55, each sprocket 55 being connected to a drive motor. The sprockets 55 on the same crossbar 53 rotate synchronously. The bottom of the two gantry support rods 52 of each group of gantry bodies 51 is rotatably connected to two opposing and parallel sprockets 56. The sprockets 55 and 56 on the same group of gantry bodies 51 are arranged vertically opposite each other. Each pair of sprockets 55 and 56 on the same group of gantry bodies 51 is connected to a chain 57. The chain 57 is connected to the gantry support rod 52 of the next group of gantry bodies 51 from the outside to the inside through a support plate 58. The chain 57 on the innermost group of gantry bodies 51 is connected to the platform body 1 through a support plate 58. The sprockets 55, 56, chain 57, and support plate 58 are all located between the two gantry support rods 52 of the innermost group of gantry bodies 51.
[0042] In this embodiment, the second group of gantry bodies 51 can slide vertically up and down relative to the first group of gantry bodies 51 under the drive of the hydraulic cylinder 54. Starting from the third group of gantry bodies 51 from the outside to the inside, each group of gantry bodies 51 can slide vertically up and down relative to the previous group of gantry bodies 51 with the cooperation of sprocket 1 55, sprocket 2 56, chain 57, and support plate 58.
[0043] A protective net 9 is connected between the two gantry support rods 52 of the innermost gantry body 51. The two sides of the support plate 58 extend from the gap between the protective net 9 and the gantry support rods 52 to connect with the platform body 1.
[0044] A connecting rod 18 is connected between each set of gantry bodies 51 that are positioned opposite each other on the two lifting devices 5 to enhance stability.
[0045] The chassis 6 has two support leg fixing tubes 10 connected to opposite sides along its length. The support leg fixing tubes 10 are parallel to the width direction of the chassis 6. Each support leg fixing tube 10 has an extension leg 11 slidably connected inside it. The extension legs 11 on the same side extend out of the corresponding support leg fixing tube 10 in opposite directions. One end of the extension leg 11 extending out of the support leg fixing tube 10 is vertically threaded to a threaded support rod 12. The bottom of the threaded support rod 12 is connected to a support foot 13. The extension legs 11 have several limiting holes along the width direction of the chassis 6. Limiting pins 14 that can be inserted into the support leg fixing tubes 10 are connected to the support leg fixing tubes 10 and are adapted to the limiting holes.
[0046] A level sensor 15 is installed on the chassis 6, and an outrigger ground contact sensor switch 16 is installed on the outrigger fixing tube 10. The lifting device 5 can only be raised and lowered when the level sensor 15 detects that the chassis 6 is in a level state and the outrigger ground contact sensor switch 16 detects that the extended outrigger 11 is on the ground.
[0047] The chassis 6 has two rotatable wheels 7 rotatably connected to one side along its length, and one rotatable wheel 7 rotatably connected to the other side, along with a drive 8 capable of driving the wheel 7. The chassis 6 is connected to a control handle 17, which is located above the drive 8. With the assistance of the drive 8, the operator can easily move the work platform using the control handle 17.
[0048] This embodiment is applicable to many situations that require high-altitude operations, such as bricklaying and plastering, and safety maintenance.
[0049] Work process:
[0050] If a larger working space is required, the extension platform 2 can be installed on one side of the platform body 1 in the width direction before the operation to complete the assembly of the working platform.
[0051] Check that the guardrail 3 and revolving door 4 are securely installed, and ensure that the revolving door 4 can rotate normally and that the locking function is intact. The worker lowers the work platform to its lowest position, enters the work platform through the revolving door 4, and then locks the revolving door 4.
[0052] Observe the level sensor 15 on the chassis 6, and adjust the level of the work platform by adjusting the extended outriggers 11 inside the outrigger fixing tubes 10 on both sides of the chassis 6. Specifically, insert the limit pin 14 into the limit hole at different positions of the extended outrigger 11 through the outrigger fixing tube 10 to change the extension length of the extended outrigger 11. At the same time, rotate the threaded support rod 12 at the end of the extended outrigger 11 to move the outrigger 13 up and down, further fine-tuning the level of the work platform. Continue until the level sensor 15 shows that the chassis 6 is level, and the outrigger ground contact switch 16 senses that the extended outrigger 11 is on the ground, thus meeting the start conditions of the lifting device 5.
[0053] The operator holds the control handle 17, the drive 8 is started, which drives one of the moving wheels 7 on one side of the chassis 6 to rotate. Since the other side of the chassis 6 is connected to two moving wheels 7, the operator can flexibly control the work platform to move to the work site with the coordinated action of the three wheels.
[0054] The hydraulic cylinder 54 is activated, and its output end pushes the crossbar 53 on the second set of gantry bodies 51, causing the second set of gantry bodies 51 to rise vertically relative to the first set of gantry bodies 51, thereby raising the platform body 1. Simultaneously, starting from the third set of gantry bodies 51, the drive motor on the crossbar 53 drives the first sprocket 55 to rotate. The first sprocket 55, through the transmission between the chain 57 and the second sprocket 56, pulls the chain 57, which in turn, through the support plate 58, causes the next set of gantry bodies 51 to rise vertically relative to the previous set of gantry bodies 51, thus raising the platform body 1. The innermost set of gantry bodies 51 can directly raise the platform body 1. Throughout the entire lifting process, the connecting rod 18 between each set of gantry bodies 51 in opposite positions on the two lifting devices 5 ensures that the two lifting devices 5 operate synchronously and stably, guaranteeing the smooth lifting and lowering of the platform body 1.
[0055] Once the designated height is reached, workers perform high-altitude operations on the work platform. The guardrail 3 at the top edge of the work platform prevents accidental falls, and the protective net 9 connecting the two gantry support rods 52 of the innermost gantry body 51 prevents personnel or objects from falling through the gaps between the gantry bodies 51, further ensuring operational safety.
[0056] After the operation is completed, hydraulic cylinder 54 retracts, and the components move in reverse order, lowering the work platform to its initial position, unlocking the revolving door 4, and allowing the worker to leave the work platform. Remove the extension platform 2 (if installed), and disassemble and properly store the guardrail 3 and revolving door 4. Retract the extension legs 11, control the direction using the handle 17, and use the drive 8 to drive the moving wheels 7 to move the equipment to its storage location.
[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mobile elevating work platform comprising a work platform, characterised in that, The work platform has two structural states during operation. The first structural state is that the work platform includes a platform body (1) and an extension platform (2). One side of the platform body (1) in the width direction is detachably connected to the extension platform (2). The second structural state is that the work platform includes a platform body (1). In the first structural state, the top edge of the combined platform body (1) and extension platform (2) is equipped with a guardrail (3) and a rotating door (4). In the second structural state, the guardrail (3) and the rotating door (4) are installed on the top edge of the platform body (1). One side of the revolving door (4) is rotatably connected to the guardrail (3), and the other side of the revolving door (4) is locked to the guardrail (3); The platform body (1) has lifting devices (5) connected to opposite sides in the length direction. The bottom of the two lifting devices (5) is connected to a chassis (6). The bottom of the chassis (6) is provided with a moving wheel (7) and a driver (8) that can drive the moving wheel (7) to rotate.
2. The mobile elevating work platform of claim 1, wherein, Each lifting device (5) includes multiple sets of gantry bodies (51) of the same number, and the gantry bodies (51) on the two lifting devices (5) are arranged opposite to each other; Each gantry body (51) includes two vertically opposite gantry support rods (52). Multiple gantry bodies (51) are arranged from the outside to the inside. The bottom of the outermost gantry body (51) is fixedly connected to the chassis (6), and the innermost gantry body (51) is connected to the platform body (1). Adjacent gantry bodies (51) are vertically slidably connected, and adjacent gantry bodies (51) can move relative to each other in the vertical direction.
3. A mobile elevating work platform according to claim 2, wherein, In the order from the outside to the inside, starting from the second group of gantry bodies (51), each group of gantry bodies (51) has two gantry support rods (52) connected to horizontally set crossbars (53) on the side away from the platform body (1); the crossbars (53) on the second group of gantry bodies (51) are connected to the output end of the hydraulic cylinder (54), and the bottom of the hydraulic cylinder (54) is fixedly connected to the chassis (6).
4. The mobile elevating work platform of claim 3, wherein, Two parallel sprockets (55) are rotatably connected to each crossbar (53). Two opposing and parallel sprockets (56) are rotatably connected to the bottom of the two gantry support rods (52) of each gantry body (51). Sprockets (55) and sprockets (56) on the same gantry body (51) are arranged vertically opposite each other. A chain (57) is connected between each pair of sprockets (55) and sprockets (56) on the same gantry body (51). The chain (57) is connected to the gantry support rod (52) of the next gantry body (51) from the outside to the inside through the support plate (58). The chain (57) on the innermost gantry body (51) is connected to the platform body (1) through the support plate (58). Sprocket 1 (55), sprocket 2 (56), chain (57), and support plate (58) are all located between the two gantry support rods (52) of the innermost set of gantry bodies (51).
5. A mobile elevating work platform according to claim 4, wherein, A protective net (9) is connected between the two gantry support rods (52) of the innermost gantry body (51). The two sides of the support plate (58) extend from the gap between the protective net (9) and the gantry support rod (52) to connect with the platform body (1).
6. The mobile elevating work platform of claim 1, wherein, The chassis (6) is connected to two support leg fixing tubes (10) on opposite sides in the length direction. The support leg fixing tubes (10) are parallel to the width direction of the chassis (6). Each support leg fixing tube (10) is slidably connected to an extension leg (11). The extension legs (11) on the same side extend out of the corresponding support leg fixing tube (10) in opposite directions. One end of the extension leg (11) extending out of the support leg fixing tube (10) is vertically threaded to a threaded support rod (12). The bottom of the threaded support rod (12) is connected to a foot (13).
7. A mobile elevating work platform according to claim 6 wherein, The extension leg (11) has several limiting holes along the width direction of the chassis (6). The leg fixing tube (10) is connected to a limiting pin (14) that can be inserted into the leg fixing tube (10). The limiting pin (14) is adapted to the limiting hole.
8. The mobile elevating work platform of claim 6, wherein, A level sensor (15) is installed on the chassis (6), and a leg grounding sensor switch (16) is installed on the outrigger fixing tube (10).
9. The mobile elevating work platform of claim 1, wherein, The chassis (6) has two movable wheels (7) rotatably connected to one side in the length direction, and a movable wheel (7) rotatably connected to the other side and connected to a driver (8) capable of driving the movable wheel (7). The chassis (6) is connected to the control handle (17), which is located above the driver (8).
10. The mobile elevating work platform of claim 2, wherein, A connecting rod (18) is connected between each set of gantry bodies (51) that are positioned opposite each other on the two lifting devices (5).