Lifting column assembly and lifting platform

Abstract

The utility model relates to the technical field of lifting machinery, specifically relates to lifting stand column subassembly and lifting platform, the fixed column of lifting stand column subassembly has the first installation cavity of one end opening, is equipped with the installation department with through -hole on the fixed column, the movable column is worn in the first installation cavity and one end is worn and comes out the through -hole, the screw rod rotatable is worn in the second installation cavity of movable column and is cooperated with the screw sleeve screw thread on movable column, the first rolling assembly of a plurality of groups with movable column rolling contact is equipped on the installation department, and the second rolling assembly of a plurality of groups with the inner wall rolling contact of first installation cavity is equipped on movable column. Lifting platform adopts the above lifting stand column subassembly lifting, and its through first rolling assembly and second rolling assembly convert the friction between fixed column and movable column into rolling friction, reduce the wear and tear between both, and through the installation department support first rolling assembly, avoid the punching on the fixed column, further guarantee the strength of fixed column, further guarantee the reliability of lifting platform.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, specifically to a lifting column assembly and a lifting platform. Background Technology

[0002] With increasingly diversified production demands, lifting platforms, as crucial equipment in the field of aerial work, have seen their performance and adaptability become key indicators of their value. Existing lifting platforms utilize a lifting column system for height adjustment. This system uses a transmission screw and nut to extend or retract the inner tube of the lifting column relative to the outer tube, enabling the platform's vertical movement. However, in actual use, because the platform needs to support operators or equipment, uneven stress often occurs. This causes the force exerted on the inner tube to not be perpendicular downwards, resulting in a clearance between the inner and outer tubes. During lifting, the inner tube may deviate within the outer tube, accelerating wear between them. Over time, this reduces the supporting stability of the lifting column, causing the lifting platform to tilt and sway. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a lifting column assembly and a lifting platform. By setting a first rolling component and a second rolling component between the movable column and the fixed column, the friction between the two is converted into rolling friction, reducing wear between them. Furthermore, by setting an installation part on the top of the fixed column to support the first rolling component, the need for drilling on the fixed column is reduced, further ensuring the strength of the fixed column, reducing column deformation, and further ensuring the reliability of the lifting platform.

[0004] To solve the above-mentioned technical problems, this utility model provides a lifting column assembly, including a fixed column, a movable column, and a lead screw. The fixed column has a first mounting cavity with one end open, and a mounting part is provided at one end of the fixed column. The mounting part has a through hole. The movable column passes through the first mounting cavity and one end protrudes from the through hole. The movable column has a second mounting cavity. The lead screw is rotatably inserted into the second mounting cavity and threadedly engaged with a threaded sleeve on the movable column. The mounting part is circumferentially provided with multiple sets of first rolling components that roll in contact with the movable column, and the movable column is circumferentially provided with multiple sets of second rolling components that roll in contact with the inner wall of the first mounting cavity.

[0005] Furthermore, the fixed column and the movable column have square cross-sections, and the four outer side walls of the movable column correspond to the four corners of the fixed column respectively. The first rolling assembly is provided in four sets and is evenly distributed at the four corners of the mounting part.

[0006] Furthermore, the mounting part includes a guide cover plate detachably connected to the fixed column, the guide cover plate is provided with a mounting groove, and a guide sealing plate is detachably provided on the upper side of the guide cover plate. The first rolling assembly includes a first roller disposed on a first shaft, the first roller rollingly contacting the movable column, the two ends of the first shaft being connected to limiting blocks, the two limiting blocks being located in the mounting groove, and the guide cover plate also being provided with a fastening hole communicating with the mounting groove, the fastener passing through the fastening hole and abutting against the limiting block.

[0007] Furthermore, the movable column is provided with a wear-resistant plate that makes rolling contact with the first rolling assembly.

[0008] Furthermore, the second rolling assembly has four sets evenly distributed around the bottom of the movable column in the circumferential direction. The second rolling assembly includes a mounting block connected to the fixed column, and the mounting block is provided with a second roller.

[0009] This utility model also provides a lifting platform, including: Chassis components; Top surface component; Multiple sets of the above-mentioned lifting column assemblies, wherein the fixed column of each lifting column assembly is fixed to the chassis assembly, and the movable column is fixed to the top surface assembly; The drive assembly includes a transmission mechanism and a drive component, the output end of which is connected to the bottom of the lead screw via the transmission mechanism.

[0010] Furthermore, the transmission mechanism includes a first transmission shaft, a second transmission shaft, and a worm gear structure. The output end of the drive component is connected to the first transmission shaft via a first steering gear. Both ends of the first transmission shaft are connected to the second transmission shaft via a second steering gear. The second transmission shaft is connected to the worm of the worm gear structure, and the lead screw is connected to the worm wheel of the worm gear structure.

[0011] Furthermore, the top surface assembly includes a support frame and a telescopic platform composed of several telescopic components. The rear end of the support frame is provided with a tank chain, and the other end of the tank chain is connected to a mounting bracket on the chassis assembly. The cable of the telescopic component extends along the center line of the tank chain and is connected to an electrical control box on the chassis assembly.

[0012] Furthermore, it also includes a moving staircase, the bottom of which rolls in engagement with the chassis assembly, and the top of which is hinged to the top surface assembly.

[0013] Furthermore, the top surface assembly is provided with a fence.

[0014] The beneficial effects of this utility model are as follows: The lifting column assembly includes a fixed column, a movable column, and a lead screw. The lead screw rotates and engages with a threaded sleeve on the movable column, driving the movable column to extend or retract from the first mounting cavity of the fixed column, thus achieving the lifting and lowering of the lifting column assembly. The mounting portion at the top of the fixed column is used to install the first rolling component, avoiding drilling holes in the fixed column, ensuring the overall strength of the fixed column, and improving its support performance. Furthermore, through the rolling contact between the first rolling component and the movable column, and the rolling contact between the second rolling component and the first mounting cavity, the friction between the movable column and the fixed column can be converted into rolling friction, reducing wear. The first rolling component can also compensate for the gap between the movable column and the fixed column, maintaining stability between them and preventing the movable column from swaying within the fixed column during lifting and lowering. This ensures balanced force distribution between the movable column and the fixed column, reducing the eccentric load on the movable column within the fixed column.

[0015] The lifting platform uses a lifting column assembly to drive the top assembly to rise and fall, thus adjusting the platform's height. The chassis assembly supports the entire unit, while the top assembly carries operators or equipment. The chassis assembly is fixed to the fixed column of the lifting column assembly, and the top assembly is fixed to the movable column of the lifting column assembly. The movable column extends or retracts from the first mounting cavity of the fixed column, driving the top assembly to rise and fall, achieving height adjustment and further improving the stability of the lifting platform.

[0016] In summary, by employing this utility model, the friction between the movable column and the fixed column is converted into rolling friction by setting a first rolling component and a second rolling component between them, reducing wear between them. Furthermore, the first rolling component compensates for the gap between the fixed column and the movable column, keeping the movable column in a pre-tightened state at all times, effectively preventing the movable column from swaying or being unevenly loaded when it rises and falls within the fixed column. Moreover, by placing the first rolling component on the mounting part at the top of the fixed column, the support strength of the fixed column is guaranteed, reducing the need for drilling holes in the fixed column, further ensuring the strength of the fixed column, reducing column deformation, and ensuring the reliability of the lifting platform.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the lifting column assembly of this utility model; Figure 2 This is a schematic diagram of the structure of the movable column of this utility model; Figure 3 This is a schematic diagram of the structure of the fixing column of this utility model; Figure 4 This is a three-dimensional structural diagram of the lifting platform of this utility model; Figure 5 This is a front view of the lifting platform of this utility model; Figure 6 This is a schematic diagram of the drive component of this utility model.

[0019] In the attached diagram: 100-Chassis assembly, 110-Mounting bracket, 120-Electrical control box, 200-Top assembly, 210-Support frame, 220-Telescopic platform, 230-Fence, 300-Lifting column assembly, 310-Fixed column, 320-Moving column, 321-Abrasion plate, 322-Threaded sleeve, 330-Mounting part, 331-Through hole, 332-Guide cover plate, 332a-Mounting groove, 332b-Fasting hole, 333-Guide sealing plate. 400-Drive assembly, 410-Lead screw, 421-First drive shaft, 422-Second drive shaft, 423-Worm gear structure, 424-First steering gear, 425-Second steering gear, 430-Drive component, 500-First rolling assembly, 520-First roller, 530-Limit block, 540-Fastener, 600-Second rolling assembly, 610-Mounting block, 620-Second roller, 700-Tank chain, 800-Follow-up staircase. Detailed Implementation

[0020] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0021] Reference Figures 1 to 3 This utility model provides a lifting column assembly, including a fixed column 310, a movable column 320, and a lead screw 410. The fixed column 310 has a first mounting cavity with one end open, and a mounting part 330 with a through hole 331 at one end. The movable column 320 passes through the first mounting cavity and extends out of the through hole 331 at one end. The movable column 320 has a second mounting cavity, and the lead screw 410 is rotatably inserted into the second mounting cavity and threadedly engaged with a threaded sleeve 322 on the movable column 320. When the lead screw 410 rotates, the threaded sleeve 322 on the movable column 320 engages with the lead screw 410. Because the movable column 320 is restricted from rotation in the first mounting cavity, it moves along the axial direction of the fixed column 310, thereby causing the movable column 320 to extend or retract from the first mounting cavity.

[0022] Furthermore, the mounting portion 330 is circumferentially provided with multiple sets of first rolling components 500 that roll in contact with the movable column 320, and the movable column 320 is circumferentially provided with multiple sets of second rolling components 600 that roll in contact with the inner wall of the first mounting cavity. The mounting portion 330 provided on the top of the fixed column 310 is used to install the first rolling components 500, avoiding drilling holes in the fixed column 310, ensuring the overall strength of the fixed column 310, and improving the support performance. Furthermore, through the rolling contact between the first rolling assembly 500 and the movable column 320, and the rolling contact between the second rolling assembly 600 and the first mounting cavity, the friction between the movable column 320 and the fixed column 310 can be converted into rolling friction, reducing wear. The first rolling assembly 500 can also compensate for the gap between the movable column 320 and the fixed column 310, keeping the movable column 320 and the fixed column 310 stable, preventing the movable column 320 from swaying in the fixed column 310 during the lifting and lowering process, making the force between the movable column 320 and the fixed column 310 balanced, and reducing the off-center load of the movable column 320 in the fixed column 310.

[0023] In some embodiments, the fixed column 310 and the movable column 320 have square cross-sections, and the four outer side walls of the movable column 320 correspond to the four corners of the fixed column 310, respectively. The first rolling assembly 500 is provided in four sets and evenly distributed at the four corners of the mounting portion 330. Furthermore, the fixed column 310 and the movable column 320 can be made of profiles with several grooves and protrusions to improve the bending resistance, resistance to bending and torsion, and achieve a lightweight design, enabling maximum support strength with minimal weight.

[0024] This method provides a larger effective guiding contact area between the fixed column 310 and the movable column 320, ensuring a smooth lifting process. Furthermore, the four corners of the fixed column 310 form a stronger rotational constraint on the side wall of the movable column 320, significantly improving the torsional resistance of the fixed column 310. The force is transferred from the side wall of the movable column 320 to the four corners of the fixed column 310, which are areas with high structural strength, thus dispersing the force and further ensuring the load-bearing strength of the lifting column assembly 300.

[0025] In some embodiments, the mounting part 330 includes a guide cover plate 332 detachably connected to the fixing post 310. The guide cover plate 332 has a mounting groove 332a for mounting the first rolling assembly 500, and a guide sealing plate 333 is detachably provided on the upper side of the guide cover plate 332. During installation, after fixing the guide cover plate 332 to the top of the fixing post 310, the first rolling assembly 500 is installed in the mounting groove 332a, and then the guide sealing plate 333 is installed on the guide cover plate 332 to realize the installation of the first rolling assembly 500. Furthermore, the outer peripheral wall of the fixing post 310 is provided with several grooves with large cavities and small openings. The bolt with holes can be placed in the grooves and will not come out of the grooves. The bolt with holes and the grooves can be interference-fitted. The diameter of the connecting section of the bolt with holes is smaller than the diameter of the main body, so that the connecting section can extend from the top of the groove and connect with the guide cover plate 332. The guide cover plate 332 is provided with several holes for connecting with bolts. The guide cover plate 332 and the fixing column 310 can be connected by rotating the bolts with external force.

[0026] Furthermore, the first rolling assembly 500 includes a first roller 520 disposed on a first shaft. The first roller 520 rolls in contact with the movable column 320. Both ends of the first shaft are connected to limiting blocks 530. The two limiting blocks 530 are located within the mounting groove 332a. The guide cover plate 332 is also provided with fastening holes 332b communicating with the mounting groove 332a. Fasteners 540 pass through the fastening holes 332b and abut against the limiting blocks 530. In this way, the limiting blocks 530 are positioned by the fasteners 540 abutting against them, thereby positioning the first roller 520 so that it can abut against the surface of the movable column 320. The fasteners 540 can be screws, and the position of the limiting blocks 530 can be positioned by screwing the fasteners 540 into or out of the fastening holes 332b.

[0027] In some embodiments, the second rolling assembly 600 may be arranged in multiple rows along the axial direction of the movable column 320, with four sets of rollers evenly distributed on the four surfaces of the movable column 320 in each row. Further, the second rolling assembly 600 has four sets evenly distributed around the bottom circumference of the movable column 320. The second rolling assembly 600 includes a mounting block 610 connected to the fixed column 310, and a second roller 620 is provided on the mounting block 610. The second roller 620 cooperates with the first roller 520 to guide the movable column 320 and the fixed column 310, improving stability. Further, the movable column 320 is provided with a wear-resistant plate 321 that rolls in contact with the first rolling assembly 500, improving the wear resistance of the movable column 320 and reducing wear.

[0028] Reference Figures 1 to 6This utility model also provides a lifting platform, including a chassis assembly 100, a top surface assembly 200, and multiple sets of the aforementioned lifting column assemblies 300. The fixed column 310 of each lifting column assembly 300 is fixed to the chassis assembly 100, and the movable column 320 is fixed to the top surface assembly 200. The drive assembly 400 includes a transmission mechanism and a drive component 430. The output end of the drive component 430 is connected to the bottom of the lead screw 410 through the transmission mechanism. In this configuration, the chassis assembly 100 supports the entire device, the top surface assembly 200 carries operators or equipment, and the drive component 430 drives each lead screw 410 to rotate through the transmission mechanism. The lead screw 410 engages with the threaded sleeve 322 on the movable column 320, causing the movable column 320 to extend or retract from the first mounting cavity of the fixed column 310, thereby raising or lowering the top surface assembly 200 to achieve height adjustment and further improve the stability of the lifting platform. The lifting column assembly 300 is provided in multiple sets. In this embodiment, it is preferred to provide four sets, which are distributed at the four corners of the top surface assembly 200 and the chassis assembly 100.

[0029] The chassis assembly 100 has a walking system at its bottom for moving the lifting platform. The walking system includes at least two sets of diagonally distributed drive wheels and two sets of diagonally distributed steering wheels to facilitate the movement of the lifting platform. It is understood that the walking system may also be equipped with four sets of steering wheels, with two sets diagonally distributed and the other two sets located in the middle of the chassis assembly 100. The actual number and position can be set as needed.

[0030] The top assembly 200 includes a support frame 210 and a telescopic platform 220 composed of several telescopic components, which is mounted on the support frame 210. Multiple telescopic components are provided, each with a fixed component and a movable component. The movable component can extend or retract from the fixed component via a telescopic drive, changing the platform shape through the extension and retraction of each component to accommodate equipment with irregular shapes and varying sizes. A tank chain 700 is located at the rear end of the support frame 210, with the other end of the tank chain 700 connected to a mounting bracket 110 on the chassis assembly 100. The cables of the telescopic components extend along the centerline of the tank chain 700 and connect to an electrical control box 120 on the chassis assembly 100. When the top assembly 200 is raised or lowered, the cables connected to the telescopic components and the electrical control box 120 at both ends can be retracted by the bending and changing shape of the tank chain 700. Furthermore, a fence 230 is also provided on the top component 200. The fence 230 is located on the support frame 210 and has an opening on one side of the telescopic end of the telescopic member. At this time, the opening side of the fence 230 is used to dock with the device to be tested.

[0031] In some embodiments, a movable staircase 800 is also included, the bottom of which is in rolling engagement with the chassis assembly 100, and the top of which is hinged to the top surface assembly 200. The movable staircase 800 facilitates the operator's movement from the ground to the telescopic platform 220. When the top surface assembly 200 is raised or lowered, the bottom of the movable staircase 800 moves on the chassis assembly 100, and the top of the movable staircase 800 rotates around its fulcrum relative to the top surface assembly 200, thus changing the tilt angle of the movable staircase 800. Further, the movable staircase 800 includes four sets of support rods and treads. The bottom of the four sets of support rods is equipped with rollers that roll in rolling engagement with guide rails on the chassis assembly 100. The tops of the four sets of support rods are hinged to the top surface assembly 200, and the treads are located between the four support rods, with each of the four corners hinged to one of the four support rods. In this manner, when the movable staircase 800 tilts and moves, the treads are sandwiched between the four support rods, maintaining a horizontal position.

[0032] Further, the transmission mechanism includes a first transmission shaft 421, a second transmission shaft 422, and a worm gear structure 423. The output end of the drive member 430 is connected to the first transmission shaft 421 via a first steering gear 424. Both ends of the first transmission shaft 421 are connected to the second transmission shaft 422 via a second steering gear 425. The second transmission shaft 422 is connected to the worm of the worm gear structure 423, and the lead screw 410 is connected to the worm wheel of the worm gear structure 423. In this case, the drive member 430 can be a reducer located at the bottom of the chassis assembly 100. Both the first transmission shaft 421 and the second transmission shaft 422 are located at the bottom of the chassis assembly 100, with the first transmission shaft 421 extending along the width direction of the chassis assembly 100 and the two second transmission shafts 422 extending along the length direction of the chassis assembly 100. The drive unit 430 drives the first drive shaft 421 to rotate. The two ends of the first drive shaft 421 drive the second drive shaft 422 to rotate through the second steering gear 425. The second drive shaft 422 drives the worm of the worm gear structure 423 to rotate. Through the cooperation of the worm gear, the lead screw 410 is driven to rotate, which in turn drives the movable column 320 to rise and fall.

[0033] In summary, by employing this utility model, the friction between the movable column 320 and the fixed column 310 is converted into rolling friction by setting a first rolling component 500 and a second rolling component 600 between them, reducing wear. Furthermore, the first rolling component 500 compensates for the gap between the fixed column 310 and the movable column 320, ensuring the movable column 320 remains in a pre-tensioned state at all times, effectively preventing swaying and uneven loading of the movable column 320 during lifting and lowering within the fixed column 310. Additionally, placing the first rolling component 500 on the mounting portion 330 at the top of the fixed column 310 ensures the supporting strength of the fixed column 310, reduces the need for drilling in the fixed column 310, further guaranteeing the strength of the fixed column 310, reducing column deformation, and ensuring the reliability of the lifting platform.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting column assembly, characterized in that, The device includes a fixed column (310), a movable column (320), and a lead screw (410). The fixed column (310) has a first mounting cavity with one end open. One end of the fixed column (310) is provided with a mounting part (330). The mounting part (330) has a through hole (331). The movable column (320) passes through the first mounting cavity and one end passes through the through hole (331). The movable column (320) has a second mounting cavity. The lead screw (410) is rotatably passed through the second mounting cavity and is threadedly engaged with the threaded sleeve (322) on the movable column (320). The mounting part (330) is circumferentially provided with multiple sets of first rolling components (500) that roll in contact with the movable column (320). The movable column (320) is circumferentially provided with multiple sets of second rolling components (600) that roll in contact with the inner wall of the first mounting cavity.

2. The lifting column assembly according to claim 1, characterized in that, The fixed column (310) and the movable column (320) have square cross sections, and the four outer side walls of the movable column (320) correspond to the four corners of the fixed column (310). The first rolling assembly (500) is provided in four sets and is evenly distributed at the four corners of the mounting part (330).

3. The lifting column assembly according to claim 1, characterized in that, The mounting part (330) includes a guide cover plate (332) detachably connected to the fixed column (310). The guide cover plate (332) is provided with a mounting groove (332a). A guide sealing plate (333) is detachably provided on the upper side of the guide cover plate (332). The first rolling assembly (500) includes a first roller (520) provided on a first shaft. The first roller (520) rolls in contact with the movable column (320). Both ends of the first shaft are connected to the limiting blocks (530). The two limiting blocks (530) are located in the mounting groove (332a). The guide cover plate (332) is also provided with a fastening hole (332b) that communicates with the mounting groove (332a). The fastener (540) passes through the fastening hole (332b) and abuts against the limiting block (530).

4. The lifting column assembly according to claim 1, characterized in that, The movable column (320) is provided with a wear plate (321) that rolls in contact with the first rolling assembly (500).

5. The lifting column assembly according to claim 1, characterized in that, The second rolling assembly (600) has four sets evenly distributed around the bottom of the movable column (320). The second rolling assembly (600) includes a mounting block (610) connected to the fixed column (310), and the mounting block (610) is provided with a second roller (620).

6. A lifting platform, characterized in that, include: Chassis components (100); Top surface component (200); The lifting column assembly (300) according to any one of claims 1-5, wherein the fixed column (310) of each lifting column assembly (300) is fixed to the chassis assembly (100), and the movable column (320) is fixed to the top surface assembly (200); The drive assembly (400) includes a transmission mechanism and a drive element (430), the output end of which is connected to the bottom of the lead screw (410) via the transmission mechanism.

7. The lifting platform according to claim 6, characterized in that, The transmission mechanism includes a first transmission shaft (421), a second transmission shaft (422), and a worm gear structure (423). The output end of the drive unit (430) is connected to the first transmission shaft (421) through a first steering gear (424). The two ends of the first transmission shaft (421) are connected to the second transmission shaft (422) through a second steering gear (425). The second transmission shaft (422) is connected to the worm of the worm gear structure (423). The lead screw (410) is connected to the worm wheel of the worm gear structure (423).

8. The lifting platform according to claim 6, characterized in that, The top assembly (200) includes a support frame (210) and a telescopic platform (220) composed of several telescopic components. The rear end of the support frame (210) is provided with a tank chain (700). The other end of the tank chain (700) is connected to a mounting bracket (110) on the chassis assembly (100). The cable of the telescopic component extends along the center line of the tank chain (700) and is connected to an electrical control box (120) on the chassis assembly (100).

9. The lifting platform according to claim 6, characterized in that, It also includes a moving staircase (800), the bottom of which is in rolling engagement with the chassis assembly (100) and the top of which is hinged to the top surface assembly (200).

10. The lifting platform according to claim 6, characterized in that, The top surface component (200) is provided with a fence (230).

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