Flexible lifting platform

Abstract

The utility model relates to a flexible lifting platform, including base, lifting platform, lifting assembly includes a plurality of fixed fixed link with base and fixed movable link with lifting platform, and the first installation cavity with the upper end opening has on the fixed link, and the movable link is worn in the first installation cavity, drive mechanism drives movable link and moves along the axial direction of fixed link and stretches out or retracts from the opening, the guide support subassembly includes a plurality of staggered arrangement's first rolling part and second rolling part, and the outer wall rolling contact of first rolling part is established on the fixed link with movable link, and the inner wall rolling contact of second rolling part is established on movable link with the first installation cavity, and through the first rolling part adjustable, make its when the deflection phenomenon between fixed link and movable link appears adjust, make fixed link and movable link always coaxial arrangement between, reduce the possibility that movable link stretches out fixed link and appears deflection, guarantee the stability of flexible lifting platform, prolong the life.

Description

Technical Field

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

[0002] Mobile scissor lifts play a vital role in aerial work. Existing platforms with controllable lifting height primarily employ scissor lifts, guide rail lifts, and chain lifts. Lifting columns, due to their adjustable height, are also widely used in scissor lifts. Currently, the inner and outer tubes of the lifting column are typically supported by static sliders to ensure stable relative movement and prevent swaying. However, this method suffers from wear on the static sliders during lifting. Uneven wear on multiple static sliders can cause the inner tube to deviate from its original position within the outer tube during lifting. Over time, this deviation accelerates wear on the deviated side, leading to further tilting and swaying of the inner tube within the outer tube. This ultimately renders the scissor lift unreliable and limits its lifespan. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a flexible lifting platform. A drive mechanism synchronously extends and retracts multiple movable rods from a fixed rod, ensuring stable lifting of the platform. A first and second rolling element guides and supports the fixed and movable rods, converting friction between them into rolling friction, reducing wear. Furthermore, the adjustable first rolling element allows for adjustment in case of misalignment between the fixed and movable rods, ensuring they remain coaxial and reducing the likelihood of misalignment after the movable rods extend from the fixed rod. This guarantees the stability of the flexible lifting platform and extends its service life.

[0004] This utility model provides a flexible lifting platform to solve the above-mentioned technical problems, comprising:

[0005] Base;

[0006] Lifting platform;

[0007] The lifting assembly includes multiple sets of fixed rods fixed to the base and movable rods fixed to the lifting platform. The fixed rods have a first mounting cavity with an opening at the upper end, and the movable rods pass through the first mounting cavity.

[0008] A drive mechanism drives the movable rod to move along the axial direction of the fixed rod, extending or retracting from the opening;

[0009] The guide support assembly includes multiple sets of staggered first and second rolling elements. The first rolling elements are disposed on the fixed rod and roll in contact with the outer wall of the movable rod, and the second rolling elements are disposed on the movable rod and roll in contact with the inner wall of the first mounting cavity.

[0010] Furthermore, the first rolling element is arranged in multiple rows along the axial direction of the fixed rod, and each row is arranged in multiple rows around the fixed rod in the circumferential direction.

[0011] Furthermore, the fixed rod and the movable rod are square rods, and the first rolling elements are arranged in two rows on the outer walls of both ends of the fixed rod, with four first rolling elements arranged around the perimeter of the fixed rod in each row.

[0012] Furthermore, both the fixed rod and the movable rod are provided in four sets, and are respectively located at the four corners of the base and the lifting platform.

[0013] Further, the first rolling element includes:

[0014] A pad is provided on the outer wall of the fixing rod;

[0015] The first mounting base has an adjusting screw hole and is detachably mounted on the pad by bolts;

[0016] The set screw is threaded into the adjusting screw hole and its end abuts against the pad;

[0017] The first roller is mounted on the first mounting base and partially contacts the movable rod through a through hole on the fixed rod.

[0018] Further, the second rolling element includes:

[0019] The second mounting base is located at the bottom of the movable rod.

[0020] The second roller has multiple sets arranged around the circumference of the second mounting base, and the second roller portion protrudes from the outer wall of the second mounting base and contacts the inner wall of the first mounting cavity.

[0021] Furthermore, the drive mechanism includes:

[0022] Drive components,

[0023] A lead screw is movably inserted into the inner cavity of the movable rod, and the bottom end of the lead screw is connected to the output end of the drive component through a transmission mechanism.

[0024] A threaded sleeve is connected to the movable rod and threadedly engaged with the lead screw.

[0025] Furthermore, the transmission mechanism includes:

[0026] A bevel gear is fixed to the bottom end of the lead screw.

[0027] Multiple transmission rods are provided, one of which is connected to the output end of the drive component. Both ends of the transmission rod are provided with transmission bevel gears that mesh with the two lead screw bevel gears respectively.

[0028] Furthermore, the lifting platform is equipped with a railing.

[0029] Furthermore, the base is provided with two sets of diagonally distributed drive wheels and two sets of diagonally distributed steering wheels.

[0030] The beneficial effects of using this utility model are as follows:

[0031] The base supports the entire device, and the lifting platform carries operators or tools. The lifting assembly supports the lifting platform and includes a fixed rod and movable rods. A first mounting cavity on the fixed rod accommodates the movable rods. A drive mechanism drives multiple sets of movable rods to extend or retract synchronously from the fixed rod, achieving stable adjustment of the lifting platform's height. The guide support assembly includes multiple sets of staggered first and second rolling elements. The arrangement of the first and second rolling elements converts the friction between the movable rod and the fixed rod into rolling friction, reducing wear.

[0032] Simultaneously, the first rolling element is installed on the outer wall of the movable rod. The first roller of the first rolling element passes through the mounting hole on the movable rod and rolls in contact with it. At this time, the first roller is set on the first mounting seat. The gap between the first mounting seat and the pad can be adjusted by a set screw. The distance the first roller extends into the mounting hole can be adjusted by the size of the gap, allowing the first roller to abut against the outer wall of the movable rod. By adjusting the extension of the first roller, the gap between the movable rod and the fixed rod can be adjusted. Through multi-directional adjustment of the extension of the first roller, the axis of the fixed rod and the movable rod can be aligned, thereby reducing the possibility of uneven load on the movable rod within the fixed rod when it extends or retracts. Even if uneven load occurs after prolonged use, it can be adjusted by the first rolling element to allow the movable rod to return to its original position and maintain alignment with the fixed rod, ensuring the stability of the flexible lifting platform and extending its service life.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0036] Figure 3 for Figure 2 A magnified view of the details of A;

[0037] Figure 4 This is a schematic diagram of the lifting assembly of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the second rolling element of this utility model.

[0039] In the attached diagram: 100-base, 110-drive wheel, 120-steering wheel, 200-lifting platform, 210-fence, 300-lifting assembly, 310-fixed rod, 311-first mounting cavity, 312-through hole, 320-moving rod, 400-drive mechanism, 410-drive component, 420-lead screw, 421-lead screw bevel gear, 430-transmission mechanism, 431-transmission rod, 432-transmission bevel gear, 440-threaded sleeve, 500-first rolling element, 510-pad, 520-first mounting seat, 521-adjusting screw hole, 530-set screw, 540-first roller, 600-second rolling element, 610-second mounting seat, 620-second roller. Detailed Implementation

[0040] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0041] Reference Figures 1 to 5 This utility model provides a flexible lifting platform, including a base 100, a lifting platform 200, a lifting assembly 300, a drive mechanism 400, and a guide support assembly. The base 100 supports the entire device, the lifting platform 200 carries operators or tools, the lifting assembly 300 supports the lifting platform 200, the drive mechanism 400 drives the lifting assembly 300 to extend or retract to adjust the height of the lifting platform 200, and the guide support assembly guides and supports the movement between the fixed rod 310 and the movable rod 320 of the lifting assembly 300, reducing swaying or tilting of the lifting assembly 300. Furthermore, the lifting platform 200 is equipped with a railing 210 to ensure the safety of maintenance personnel. Furthermore, the base 100 is equipped with two sets of diagonally distributed drive wheels 110 and two sets of diagonally distributed steering wheels 120 to facilitate the movement of the flexible lifting platform.

[0042] The lifting assembly 300 includes multiple sets of fixed rods 310 fixed to the base 100 and movable rods 320 fixed to the lifting platform 200. Each fixed rod 310 has a first mounting cavity 311 with an upper opening, and the movable rod 320 passes through the first mounting cavity 311. The fixed rods 310 and movable rods 320 can be arranged in one, two, three, or four sets, depending on the size of the lifting platform and the lifting assembly 300. For example, when the lifting platform is small, one set of fixed rods 310 and movable rods 320 can be arranged at the center of the lifting platform; when the lifting platform is large, multiple sets of fixed rods 310 and movable rods 320 can be arranged and evenly distributed between the base 100 and the lifting platform 200. In this embodiment, four sets of fixed rods 310 and movable rods 320 are provided, located at the four corners of the base 100 and the lifting platform 200, respectively, to provide stable support for the lifting platform 200. Understandably, a reinforcing rod may be installed between the fixing rod 310 and the base 100 as needed to enhance the stability of the lifting assembly 300.

[0043] The drive mechanism 400 drives the movable rod 320 to move along the axial direction of the fixed rod 310 to extend or retract from the opening; at this time, the extension or retraction of the movable rod 320 drives the lifting platform 200 to rise and fall, thereby achieving stable adjustment of the height of the lifting platform 200.

[0044] The guide support assembly includes multiple sets of staggered first rolling elements 500 and second rolling elements 600. The first rolling elements 500 are disposed on the fixed rod 310 and roll in contact with the outer wall of the movable rod 320. The second rolling elements 600 are disposed on the movable rod 320 and roll in contact with the inner wall of the first mounting cavity 311. By setting the first rolling elements 500 and the second rolling elements 600, the friction between the movable rod 320 and the fixed rod 310 is converted into rolling friction, thereby reducing wear.

[0045] The first rolling element 500 and the second rolling element 600 can be configured as one, two, three or four groups as needed. For example, when the fixed rod 310 and the movable rod 320 are circular, the first rolling element 500 can be evenly distributed in three groups along the circumference of the fixed rod 310. The gap between the movable rod 320 and the fixed rod 310 is positioned by three-point positioning, so that the two are coaxial.

[0046] In some embodiments, both the fixed rod 310 and the movable rod 320 are square rods, that is, their cross-sections are quadrilateral.

[0047] The first rolling element 500 can be arranged in multiple rows along the axial direction of the fixed rod 310, for example, two rows, three rows, four rows, etc., as needed. Further, the first rolling element 500 is provided in two rows and located on the outer walls of both ends of the fixed rod 310, that is, on the outer walls of the bottom end and the top end of the fixed rod 310. In this case, the two rows of first rolling elements 500 can support both ends of the movable rod 320. Even after the movable rod 320 extends out of the fixed rod 310, the first rolling element 500 located at the top of the fixed rod 310 can still support the movable rod 320.

[0048] Furthermore, multiple first rolling elements 500 are arranged around the fixed rod 310 in the circumferential direction of each row. In this embodiment, four first rolling elements 500 are arranged around the peripheral wall of the fixed rod 310 in each row, that is, each surface of the fixed rod 310 is provided with a corresponding first rolling element 500. The stability of the movement between the movable rod 320 and the fixed rod 310 is ensured by the support and restriction of the movable rod 320 in four directions by the four sets of first rolling elements 500.

[0049] At this time, due to the support of the four first rolling elements 500 in the circumferential direction on the movable rod 320, when the movable rod 320 extends out of the fixed rod 310, the possibility of the movable rod 320 deflecting under pressure can be reduced, thereby reducing the possibility of unilateral wear of the movable rod 320.

[0050] In some embodiments, the first rolling element 500 includes a pad 510, a first mounting base 520, a set screw 530, and a first roller 540. The pad 510 is disposed on the outer wall of the fixing rod 310, supporting and mounting the first mounting base 520. Specifically, the first mounting base 520 has an adjusting screw hole 521 and is detachably mounted to the pad 510 by bolts. The pad 510 has a first mounting threaded hole, and the first mounting base 520 has a second mounting hole. Four sets of bolts are provided, with the smaller diameter end of the bolts passing through the second mounting hole and connecting to the first mounting threaded hole, thus mounting the first mounting base 520 onto the pad 510.

[0051] The set screw 530 is threadedly connected to the adjusting screw hole 521 and its end abuts against the pad 510. The first roller 540 is disposed on the first mounting base 520 and partially contacts the movable rod 320 through the through hole 312 on the fixed rod 310. Preferably, two sets of set screws 530 are arranged side by side, with the two sets of set screws 530 located between the four sets of bolts. By adjusting the distance between the first mounting base 520 and the pad 510 through the two sets of set screws 530, the gap between the first roller 540 and the movable rod 320 can be adjusted, so that the first roller 540 abuts against the movable rod 320. The movable rod 320 is supported by multiple sets of first rollers 540, so that the movable rod 320 can be coaxial with the fixed rod 310, and the friction between them is converted into rolling friction.

[0052] In some embodiments, the second rolling element 600 includes a second mounting base 610 and a second roller 620. The mounting position of the second mounting base 610 is not limited, as long as it supports the second roller 620. In this embodiment, the second mounting base 610 is located at the bottom of the movable rod 320, and multiple sets of the second rollers 620 are arranged circumferentially along the second mounting base 610. In this case, the second mounting base 610, located at the bottom, supports and guides the extension or retraction of the movable rod 320. When the movable rod extends or retracts, the second mounting base 610 bears a significant force, ensuring stable lifting and lowering between the movable rod and the fixed rod. Furthermore, when the movable rod 320 is configured as a square rod, the second mounting base 610 is configured as a square shape matching the shape of the movable rod 320, and the second roller 620 is disposed on the four sides of the second mounting base 610. The second roller 620 partially protrudes and contacts the outer wall of the second mounting base 610 and the inner wall of the first mounting cavity 311, so that after the top of the movable rod 320 extends out of the fixed rod 310, the second roller 620 can still roll in contact with the fixed rod 310.

[0053] In some embodiments, the drive mechanism 400 includes a drive element 410, a lead screw 420, and a threaded sleeve 440. The drive element 410 can be a servo motor, stepper motor, or any other type capable of providing rotational power. The lead screw 420 is movably inserted into the inner cavity of the movable rod 320. The bottom end of the lead screw 420 is connected to the output end of the drive element 410 via a transmission mechanism 430. The top end of the lead screw 420 is supported by a bearing on the movable rod 320. Specifically, the upper end of the movable rod 320 is connected to a sliding block adapted to the shape of the inner cavity of the movable rod 320 via a bearing. The sliding block can move along the axial direction of the movable rod 320. The bottom end of the lead screw 420 is connected to a bearing on the base 100 to ensure the stability of the lead screw 420. The threaded sleeve 440 is connected to the movable rod 320 and threadedly engaged with the lead screw 420. The threaded sleeve 440 can be integrally formed with the second mounting base 610. The lead screw 420 and the movable rod 320 are connected by a lead screw 420 nut pair. At this time, the first rolling element 500 and the second rolling element 600 abut against the fixed rod 310 and the movable rod 320, restricting their direction of movement. Furthermore, the shapes of the movable rod 320 and the fixed rod 310 also restrict the rotation of the movable rod 320. Rotational power is provided by the drive element 410 and transmitted through the transmission mechanism 430, causing multiple lead screws 420 to rotate, which in turn causes multiple movable rods 320 to simultaneously extend or retract from the fixed rod 310.

[0054] Furthermore, the transmission mechanism 430 includes a lead screw bevel gear 421 and multiple transmission rods 431. The lead screw bevel gear 421 is fixed to the bottom end of the lead screw 420. One transmission rod 431 is connected to the output end of the drive member 410. Both ends of the transmission rod 431 are provided with transmission bevel gears 432 that mesh with two of the lead screw bevel gears 421 respectively. At this time, the drive member 410 drives one of the transmission rods 431 to rotate, and the transmission bevel gear 432 on the transmission rod 431 drives the lead screw bevel gear 421 to rotate, converting horizontal rotation into vertical rotation. This, in turn, drives the lead screw 420 to rotate within the movable rod 320, and through the threaded sleeve 440, drives the movable rod 320 to move along its axial direction, thereby realizing the lifting and lowering of the lifting platform 200.

[0055] The number of transmission rods 431 can be set according to the number of fixed rods 310 and movable rods 320. In this embodiment, four sets of fixed rods 310 and movable rods 320 are used as an example. Each lead screw 420 has a lead screw bevel gear 421 at its bottom. There are three transmission rods 431, two of which are set on the horizontal sides of the base 100, and the transmission bevel gears 432 on the two transmission rods 431 mesh with the corresponding lead screw bevel gears 421; the axial direction of the other transmission rod 431 is perpendicular to the axial direction of the other two transmission shafts, and the transmission bevel gears 432 at both ends also mesh with the corresponding lead screw bevel gears 421. It can be understood that the thread direction of the lead screw 420 and the threaded sleeve 440 can be set according to the transmission needs to ensure that the movable rod 320 rises and falls synchronously. In this way, the four lead screw bevel gears 421 are connected by three transmission rods 431, so that the movable rod 320 can rise and fall synchronously.

[0056] 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.

[0057] 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 flexible lifting platform, characterized in that, include: Base (100); Lifting platform (200); The lifting assembly (300) includes multiple sets of fixed rods (310) fixed to the base (100) and movable rods (320) fixed to the lifting platform (200). The fixed rods (310) have a first mounting cavity (311) with an upper opening, and the movable rods (320) pass through the first mounting cavity (311). The drive mechanism (400) drives the movable rod (320) to move along the axial direction of the fixed rod (310) to extend or retract from the opening; The guide support assembly includes multiple sets of staggered first rolling elements (500) and second rolling elements (600). The first rolling elements (500) are disposed on the fixed rod (310) and roll in contact with the outer wall of the movable rod (320). The second rolling elements (600) are disposed on the movable rod (320) and roll in contact with the inner wall of the first mounting cavity (311).

2. The flexible lifting platform according to claim 1, characterized in that, The first rolling element (500) is arranged in multiple rows along the axial direction of the fixed rod (310), and each row is arranged in multiple rows around the fixed rod (310) in the circumferential direction.

3. The flexible lifting platform according to claim 2, characterized in that, The fixed rod (310) and the movable rod (320) are square rods. The first rolling element (500) is arranged in two rows on the outer walls of both ends of the fixed rod (310). Four first rolling elements (500) are arranged around the perimeter of the fixed rod (310) in each row.

4. The flexible lifting platform according to claim 1, characterized in that, The fixed rod (310) and the movable rod (320) are each provided in four sets, and are located at the four corners of the base (100) and the lifting platform (200), respectively.

5. The flexible lifting platform according to claim 1, characterized in that, The first rolling element (500) includes: A pad (510) is provided on the outer wall of the fixing rod (310); The first mounting base (520) has an adjusting screw hole (521) and is detachably mounted on the pad (510) by bolts; The set screw (530) is threadedly connected to the adjusting screw hole (521) and its end abuts against the pad (510); The first roller (540) is mounted on the first mounting base (520) and partially contacts the movable rod (320) through the through hole (312) on the fixed rod (310).

6. The flexible lifting platform according to claim 1, characterized in that, The second rolling element (600) includes: The second mounting base (610) is located at the bottom of the movable rod (320). The second roller (620) is provided in multiple sets and arranged circumferentially along the second mounting base (610). The second roller (620) protrudes from the outer wall of the second mounting base (610) and contacts the inner wall of the first mounting cavity (311).

7. The flexible lifting platform according to claim 1, characterized in that, The drive mechanism (400) includes: Drive unit (410). The lead screw (420) is movably inserted into the inner cavity of the movable rod (320), and the bottom end of the lead screw (420) is connected to the output end of the drive member (410) through the transmission mechanism (430). A threaded sleeve (440) is connected to the movable rod (320) and threadedly engaged with the lead screw (420).

8. The flexible lifting platform according to claim 7, characterized in that, The transmission mechanism (430) includes: The lead screw bevel gear (421) is fixed to the bottom end of the lead screw (420). Multiple transmission rods (431), one of which is connected to the output end of the drive unit (410), and both ends of the transmission rod (431) are provided with transmission bevel gears (432) that mesh with the two lead screw bevel gears (421) respectively.

9. The flexible lifting platform according to any one of claims 1-8, characterized in that, The lifting platform (200) is equipped with a railing (210).

10. The flexible lifting platform according to any one of claims 1-8, characterized in that, The base (100) is provided with two sets of diagonally distributed drive wheels (110) and two sets of diagonally distributed steering wheels (120).

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