Flexible drive lift

Abstract

This invention relates to a flexible drive lifting device, comprising a flexible drive mechanism including a main drive mechanism and auxiliary drive mechanisms symmetrically arranged on both sides of the main drive mechanism. It uses a horizontally arranged power system to complete two lifting strokes. In the first lifting stroke, the auxiliary drive mechanisms are the main lifting mechanism, and the main drive mechanism is the auxiliary lifting mechanism. In the second lifting stroke, the main drive mechanism is the main lifting mechanism, and the displacement in the second lifting stroke is greater than that in the first lifting stroke. The lifting mechanism includes a bottom long shaft, which is connected to and pulled by the power system to complete the lifting motion. A cross brace assembly is connected to the top of the lifting mechanism, and the cross brace assembly is connected to a guide rail assembly. This design allows the two drive mechanisms to play different roles in different lifting strokes, cooperating with each other to fully utilize their respective advantages, achieving a larger effective stroke while maintaining a compact structure. It also makes full use of vertical space, providing a compact lifting device solution.

Description

Technical Field

[0001] This invention relates to the field of logistics equipment technology, and more specifically to a flexible drive lifting device. Background Technology

[0002] A lifting device is a type of lifting machinery that vertically lifts people or objects. It is widely used in production workshops, warehouses, and other places. Lifting devices can be configured with corresponding lifting strokes according to different working conditions, and can employ single-stage or multi-stage scissor mechanisms. However, existing technologies suffer from at least the following problems that remain unresolved or whose solutions are too costly:

[0003] First: The existing lifting devices have a large vertical height, which cannot adapt to working conditions with limited vertical space. For example, patent document CN204999557U places the hydraulic pump under the platform and sets up two sets of inclined power units. At the same time, a large starting angle is also required, which not only makes the entire lifting device account for a large proportion of the lifting stroke, but also increases the cost of the lifting device.

[0004] Second: In the existing technology, in order to make full use of the vertical height space, a lead screw is used to drive the scissor lift device horizontally, such as in patent document CN109179258A. The motor drives the lead screw, which can meet the requirements for light load conditions, but cannot adapt to heavy load conditions, or requires a lead screw with a larger shaft diameter to meet the requirements for heavy load conditions, and the cost remains high.

[0005] Therefore, how to provide a flexible drive lifting device with features such as compact vertical structure, large effective stroke, high load capacity, and low cost is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] Therefore, the purpose of this invention is to propose a flexible drive lifting device with features such as compact vertical structure, large effective stroke, high load capacity, and low cost.

[0007] This invention provides a flexible drive lifting device, comprising:

[0008] A flexible drive mechanism includes a main drive mechanism and auxiliary drive mechanisms symmetrically arranged on both sides of the main drive mechanism; it uses a horizontally arranged power system to complete two lifting strokes. In the first lifting stroke, the auxiliary drive mechanism is the main lifting mechanism and the main drive mechanism is the auxiliary lifting mechanism; in the second lifting stroke, the main drive mechanism is the main lifting mechanism; and the displacement of the second lifting stroke is greater than the displacement of the first lifting stroke.

[0009] A lifting mechanism, the lifting mechanism including a bottom long shaft, the power system being connected to and pulling the bottom long shaft to enable the lifting mechanism to complete the lifting;

[0010] A cross brace assembly is provided, with the top of the lifting mechanism connected to the cross brace assembly.

[0011] The guide rail assembly, wherein the cross brace assembly is connected to the guide rail assembly to form a rectangular frame structure.

[0012] Furthermore, the main drive mechanism includes: a base plate and the power system, wherein the base plate serves as a supporting foundation, with the straight line containing its center in the length direction serving as the central axis;

[0013] The power system includes:

[0014] A linear power source, one end of which is fixed to the base plate, with its center line coinciding with the central axis;

[0015] The slider assembly is provided, with the other end of the linear power source being a free end to which the slider assembly is connected.

[0016] The system comprises two flexible cables, two sets of pulleys, and two support plates arranged symmetrically around the central axis. Two earring holes are symmetrically arranged on both sides of the slider assembly relative to the central axis. One end of each of the two flexible cables is fixed in one of these two earring holes, and the cables pass through two sets of pulleys arranged perpendicular to the base plate for reversing direction. The other end is fixedly connected to two annular grooves on the bottom long axis. These annular grooves are symmetrically arranged relative to the central axis and close to the support plates. The support plates support the bottom long axis as it slides under the influence of the flexible cables.

[0017] Furthermore, the central axis of the linear power source, the central axes of the two flexible cables, and the central axis of the bottom long axis are all in a plane, which is parallel to the plane of the base plate.

[0018] Furthermore, the flexible cable provides a horizontal force to the lifting mechanism, and the support plate provides a vertical force to the bottom long axis. The horizontal force and the vertical force constitute the resultant force on the lifting mechanism.

[0019] Furthermore, the secondary drive mechanism includes:

[0020] The sleeves, of which there are four, are vertically installed at the four corners of the base plate;

[0021] And an elastic element, with one elastic element corresponding to each sleeve, the outer diameter of the elastic element matching the inner diameter of the sleeve;

[0022] During the first lifting stroke, the top of the elastic element follows and closely adheres to the cross brace assembly.

[0023] Furthermore, the maximum driving force F of the secondary drive mechanism max satisfy:

[0024] F max =4K·X max <M·g

[0025] Where K is the elastic coefficient of the elastic element, X max M is the maximum deformation of the elastic element, M is the total mass of the object lifted by the cross brace assembly, guide rail assembly, and lifting mechanism, and g is the acceleration due to gravity.

[0026] Furthermore, the slider assembly includes:

[0027] The upper slider has two earring holes located on it.

[0028] The middle slider is located at the bottom of the upper slider and is fixedly connected; the push rod of the linear power source is connected to the middle slider;

[0029] The bottom slider and the middle slider are fitted together with a clearance to form a sliding connection pair.

[0030] Furthermore, the guide rail assembly includes:

[0031] The base plate has two guide rails arranged parallel to each other along its length, and the two guide rails are connected to the two cross bracing assemblies to form a rectangular frame structure.

[0032] Each guide rail has a limiting plate at one end and a positioning plate on the inner side of the other end. The positioning plate has positioning holes. The limiting plate and positioning plate are used to fix the lifted items or equipment.

[0033] Furthermore, each of the said cross brace components includes:

[0034] A cross brace, which connects the two guide rails;

[0035] A connecting plate is provided, the inner side of the guide rail is connected to the connecting plate, the connecting plate includes a horizontal plate and a vertical plate, a recessed platform is provided below the horizontal plate, the central axis of the recessed platform coincides with the central axis of the elastic element, and the distance between the concave surface of the recessed platform and the plane of the bottom plate is equal to the shortest height of the elastic element when compressed.

[0036] A support plate is fixedly connected to the outer side of the vertical plate on one side, and the top surface of the support plate is in close contact with the bottom surface of the guide rail.

[0037] Furthermore, the pulley includes:

[0038] A pulley base plate, wherein a flexible cable retainer is provided on the base plate;

[0039] A pulley shaft, which is vertically fixed to the pulley base plate, and the wheel is connected to it via a bearing;

[0040] The flexible cable retainer is used to keep the central axis of the flexible cable parallel to the plane of the base plate and to keep it always wound around the wheel.

[0041] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. This invention employs two sets of drive mechanisms, completing two lifting strokes through a horizontally arranged power system. In the first lifting stroke, the secondary drive mechanism is the main lifting mechanism, and the main drive mechanism is the auxiliary lifting mechanism. In the second lifting stroke, the main drive mechanism is the primary lifting mechanism, and the displacement in the second lifting stroke is greater than that in the first lifting stroke. This allows the two drive mechanisms to play different roles in different lifting strokes, cooperating with each other to fully utilize their respective advantages, achieving a larger effective stroke while maintaining a compact structure. It also makes full use of vertical space, providing a compact lifting device solution.

[0043] 2. By setting up flexible cables and elastic elements, the present invention can lift a larger load without changing the vertical height of the lifting device, by selecting higher-specification flexible cables and elastic elements.

[0044] 3. This invention only requires a single linear power source to drive the large-span flat scissor lift mechanism, significantly reducing costs. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0046] Figure 1 This invention provides a schematic diagram of the lifting principle of a flexible drive lifting device;

[0047] Figure 2 This is a low-position schematic diagram of the flexible drive lifting device of the present invention;

[0048] Figure 3 This is a high-level schematic diagram of the flexible drive lifting device of the present invention;

[0049] Figure 4 This is a perspective view of the flexible drive lifting device of the present invention;

[0050] Figure 5This is a schematic diagram of the bottom long axis structure of the present invention;

[0051] Figure 6 This is a schematic diagram of the slider assembly of this invention.

[0052] In the diagram, 1—flexible drive mechanism, 11—main drive mechanism, 111—base plate, 1111—central axis, 1112—base plate plane, 112—linear power source, 1121—push rod, 113—slider assembly, 1131—bottom slider, 1132—middle slider, 1133—upper slider, 11331—earring hole, 114—flexible cable, 1141—flexible cable retainer, 115—pulley, 1151—pulley base plate, 1152—pulley shaft, 1153—wheel, 1154—bearing, 116—support plate, 12—secondary drive mechanism, 121 —Sleeve, 122—Elastic element; 2—Lifting mechanism, 21—Bottom long shaft, 211—Annular groove, 22—Bottom hinge shaft, 23—Top movable shaft, 24—Top hinge shaft, 25—Inner connecting rod, 251—Inner side of inner connecting rod, 26—Outer connecting rod; 3—Guide rail assembly, 31—Guide rail, 311—Inner side of guide rail, 312—Bottom surface of guide rail, 32—Limiting plate, 33—Positioning plate, 331—Positioning hole; 4—Horizontal brace assembly, 41—Horizontal brace, 42—Connecting plate, 421—Horizontal plate, 4211—Concave platform, 422—Vertical plate, 43—Support plate. Detailed Implementation

[0053] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0054] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] Because existing lifting devices have a large vertical height, they cannot adapt to working conditions with limited vertical space. One type of technology places the hydraulic pump under the platform and sets up two sets of inclined power units. This also requires a large starting angle, resulting in the lifting device occupying a large proportion of the lifting stroke and increasing its cost. Another type, in order to make full use of vertical space, uses a lead screw to horizontally drive the scissor lift device, with a motor driving the lead screw. This is sufficient for light-load conditions, but cannot adapt to heavy-load conditions, or requires a lead screw with a larger shaft diameter to meet heavy-load requirements, resulting in similarly high costs.

[0058] In view of this, the present invention provides a flexible drive lifting device with features such as compact vertical structure, large effective stroke, high load capacity, and low cost. See attached figure. Figure 1-4 ,include:

[0059] A flexible drive mechanism 1 includes a main drive mechanism 11 and auxiliary drive mechanisms 12 symmetrically arranged on both sides of the main drive mechanism 11. It uses a horizontally arranged power system to complete two lifting strokes. In the first lifting stroke, the auxiliary drive mechanism 12 is the main lifting mechanism, and the main drive mechanism 11 is the auxiliary lifting mechanism. In the second lifting stroke, the main drive mechanism 11 is the main lifting mechanism. Furthermore, the displacement in the second lifting stroke is greater than the displacement in the first lifting stroke.

[0060] The lifting mechanism 2 includes a bottom long shaft 21, and the power system is connected to and pulls the bottom long shaft 21 to enable the lifting mechanism 2 to complete the lifting.

[0061] The cross brace assembly 4 is connected to the top of the lifting mechanism 2;

[0062] The guide rail assembly 3 is connected to the cross brace assembly 4 to form a rectangular frame structure.

[0063] This invention employs two sets of drive mechanisms, using a horizontally arranged power system to complete two lifting strokes. In the first lifting stroke, the secondary drive mechanism is the main lifting mechanism, and the main drive mechanism is the auxiliary lifting mechanism. In the second lifting stroke, the main drive mechanism is the primary lifting mechanism, and the displacement in the second lifting stroke is greater than that in the first lifting stroke. This allows the two drive mechanisms to play different roles in different lifting strokes, cooperating with each other to fully utilize their respective advantages, achieving a larger effective stroke while maintaining a compact structure. It also makes full use of vertical space, providing a compact lifting device solution.

[0064] In this invention, the lifting mechanism 2 is existing technology, specifically a lifting mechanism based on the scissor-fork principle. Although it is existing technology, the annular groove 211 on the bottom long shaft 21 of the lifting mechanism 2 and its arrangement are key to the connection between the main drive mechanism 11 and the lifting mechanism 2, and are an indispensable part of this invention. To make the technical solution of this invention clearer, the lifting mechanism 2 is further explained simply. The lifting mechanism includes a bottom long shaft 21, a bottom hinge shaft 22, a top movable shaft 23, a top hinge shaft 24, an inner connecting rod 25, and an outer connecting rod 26. The annular groove on the bottom long shaft 21 is connected to a flexible cable, and the end of the bottom long shaft 21 is connected to the top hinge shaft 24 through the inner connecting rod 25. The bottom hinge shaft 22 is arranged parallel to the bottom long shaft 21, and the bottom hinge shaft 22 is connected to the top movable shaft 23 through the outer connecting rod 26. The inner connecting rod 25 and the outer connecting rod 26 are hinged to form a scissor-fork structure.

[0065] See appendix Figure 2 and 5 The main drive mechanism 11 includes: a base plate 111 and the power system. The base plate 111 serves as a support foundation, with the straight line containing the center of its length direction serving as the central axis 1111.

[0066] The power system includes:

[0067] A linear power source 112, one end of which is fixed to the base plate 111, and its center line coincides with the central axis 1111;

[0068] The slider assembly 113 is a free end of the linear power source 112, which is connected to the slider assembly 113.

[0069] Two flexible cables 114, two sets of pulleys 115, and two support plates 116 are symmetrically arranged around the central axis 1111. Two earring holes 11331 are symmetrically arranged on both sides of the slider assembly 113 relative to the central axis 1111. One end of each of the two flexible cables 114 is fixed in one of the two earring holes 11331, and the other end passes through the two sets of pulleys 115 arranged perpendicular to the base plate 111 for reversing the direction of the flexible cables 114. The other end is fixedly connected to two annular grooves 211 of the bottom long shaft 21. The two annular grooves 211 are symmetrically arranged relative to the central axis 1111 and close to the support plate 116. The support plate 116 supports the bottom long shaft 21 as it slides under the influence of the flexible cables 114, ensuring effective support for the bottom long shaft 21.

[0070] In this invention, the linear power source 112 can be a hydraulic cylinder or an electric push rod.

[0071] See appendix Figure 5 The annular groove 211 is located between the support plate 116 and the inner connecting rod 25 of the lifting mechanism 2. Its position is close to the inner side 251 of the inner connecting rod. The position of the annular groove on the bottom long shaft effectively reduces the deflection of the bottom long shaft.

[0072] Advantageously, the support plate 116 is preferably made of high-polymer non-metallic wear-resistant material.

[0073] Advantageously, the central axis of the linear power source 112, the central axes of the two flexible cables 114, and the central axis of the bottom long axis 21 are all in a plane, which is parallel to the plane 1112 of the base plate. By setting a coplanar group of central axes and symmetrically arranged components, the forces on each component of the main drive mechanism can be balanced, making the mechanism more stable.

[0074] See appendix Figure 2 and 3 The flexible cable 114 provides a horizontal force to the lifting mechanism 2, and the support plate 16 provides a vertical force to the bottom long shaft 21. The horizontal force and the vertical force are the resultant force on the lifting mechanism 2.

[0075] See appendix Figure 1 The secondary drive mechanism 12 includes:

[0076] Sleeve 121, there are four sleeves 121, which are vertically arranged at the four corners of the base plate 111;

[0077] And an elastic element 122, each of the sleeves 121 has a corresponding elastic element 122, and the outer diameter of the elastic element 122 matches the inner diameter of the sleeve 121;

[0078] During the first lifting stroke, the top of the elastic element 122 follows and closely abuts the cross brace assembly 4. Advantageously, the maximum driving force F of the secondary drive mechanism 12 is... max satisfy:

[0079] F max =4K·X max <M·g

[0080] Where K is the elastic coefficient of the elastic element, Xmax is the maximum deformation of the elastic element, M is the total mass of the item lifted by the cross brace assembly, guide rail assembly, and lifting mechanism, and g is the acceleration due to gravity. That is, the resultant force of the four elastic elements is less than the sum of the weight of the item lifted by the cross brace assembly, guide rail assembly, and lifting device.

[0081] In this invention, the elastic element is preferably a mold gas spring.

[0082] Advantageously, see appendix. Figure 6 The slider assembly 113 includes:

[0083] The upper slider 1133 has two earring holes 11331 disposed on it.

[0084] The middle slider 1132 is located at the bottom of the upper slider 1133 and is fixedly connected; the push rod 1121 of the linear power source 112 is connected to the middle slider 1132, and the material of the middle slider 1132 is a self-lubricating and wear-resistant material, such as tin bronze alloy.

[0085] The bottom slider 1131 and the middle slider 1132 form a sliding connection pair with a clearance fit.

[0086] See appendix Figure 1 and 3 The guide rail assembly 3 includes:

[0087] Two guide rails 31 are arranged parallel to each other along the length of the base plate 111. The two guide rails 31 are connected to the two cross bracing assemblies 4 to form a rectangular frame structure.

[0088] The limiting plate 32 and the positioning plate 33 are provided at one end of each guide rail 31 and at the inner side of the other end. The positioning plate 33 is provided with a positioning hole 331. The limiting plate 32 and the positioning plate 33 are used to fix the lifted items or equipment.

[0089] See appendix Figure 3 and 4 Each of the cross brace components 4 includes:

[0090] A cross brace 41 is connected between the two guide rails 31;

[0091] The connecting plate 42 has an inner side 311 of the guide rail connected to it. The connecting plate 42 includes a horizontal plate 421 and a vertical plate 422. A recessed platform 4211 is provided below the horizontal plate 421. The central axis of the recessed platform 4211 coincides with the central axis of the elastic element 122. The distance between the concave surface of the recessed platform 4211 and the bottom plate plane 1112 is equal to the shortest height of the elastic element 122 when compressed.

[0092] Support plate 43 is fixedly connected to the outer side of vertical plate 422 on one side, and the top surface of support plate 43 is close to the bottom surface of guide rail 312.

[0093] When the device is in its lowest position, the lower end face of the vertical plate 422 is in close contact with the plane of the base plate 1112, the inner side 311 of the guide rail is connected to the connecting plate 42, and the bottom surface 312 of the guide rail is in close contact with the upper end face of the support plate 43. When the lifting device is carrying goods or equipment, the lower end faces of the connecting plate 42 and the support plate 43 are always in contact with the plane of the base plate when in the lowest position. This ensures that the lifted goods or equipment are more stably fixed on the lifting device, and at the same time, it can prevent the elastic element 122 from being damaged due to accidental overload.

[0094] See appendix Figure 2 The pulley 115 includes:

[0095] A pulley base plate 1151 is fixed on a base plate 111. A flexible cable retainer 1141 is provided on the base plate 1151. A flexible cable 114 passes through a positioning hole in the flexible cable retainer 1141. The flexible cable retainer 1141 is an L-shaped support plate with a positioning hole on its top vertical plate.

[0096] A pulley shaft 1152 is vertically fixed to the pulley base plate 1151, and the wheel 1153 is connected to it via a bearing 1154.

[0097] The flexible cable retainer 1141 is used to keep the central axis of the flexible cable 114 parallel to the plane 1112 of the base plate and to keep it always wound around the wheel 1153.

[0098] See Appendix for the present invention. Figure 1The lifting process of the flexible drive lifting device includes a first lifting stroke and a second lifting stroke. The first lifting stroke is the process of the lifting device moving from the low position L to the middle position Z. The second lifting stroke is the process of the lifting device moving from the middle position Z to the high position G. The main drive mechanism 11 plays a role in both the first and second lifting strokes. The auxiliary drive mechanism 12 plays a role only in the first lifting stroke and plays a leading role. The main drive mechanism 11 plays an auxiliary role in the first lifting stroke and a leading role in the second lifting stroke. The displacement L2 of the second lifting stroke is greater than the displacement L1 of the first lifting stroke.

[0099] During operation, goods or equipment are placed on the guide rail assembly for lifting. The push rod of the linear power source 112 pushes the slider assembly, which tightens the flexible cable 114 connected to the ear loop hole 11331. This cable then passes through the pulley for reversal and guides the bottom long shaft of the lifting mechanism to slide relative to the support plate. In the first lifting stroke, the elastic element releases its elastic force to generate the first lifting force, supporting the cross brace assembly, guide rail assembly, and the total mass of the lifted item. If further lifting is required, the lifting mechanism enters the second lifting stroke. The push rod of the linear power source 112 extends further, tightening the flexible cable and causing the bottom long shaft to slide further along the support plate. The bottom long shaft then drives the inner connecting rod, which in turn drives the top hinge shaft. Through the scissor fork structure, the lifting mechanism generates a second lifting force. The second lifting stroke is much longer than the first. The two drive mechanisms play different roles in different lifting strokes, cooperating with each other to fully utilize their respective advantages. This achieves a larger effective stroke while maintaining a compact structure, making full use of vertical space.

[0100] 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 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flexible drive lifting device, characterized in that, include: A flexible drive mechanism (1) includes a main drive mechanism (11) and auxiliary drive mechanisms (12) symmetrically arranged on both sides of the main drive mechanism (11). It uses a horizontally arranged power system to complete two lifting strokes. In the first lifting stroke, the auxiliary drive mechanism (12) is the main lifting mechanism and the main drive mechanism (11) is the auxiliary lifting mechanism. In the second lifting stroke, the main drive mechanism (11) is the main lifting mechanism. The displacement of the second lifting stroke is greater than that of the first lifting stroke. The lifting mechanism (2) includes a bottom long shaft (21), and the power system is connected to and pulls the bottom long shaft (21) to enable the lifting mechanism (2) to complete the lifting. A cross brace assembly (4) is provided, and the top of the lifting mechanism (2) is connected to the cross brace assembly (4); The guide rail assembly (3) is connected to the cross brace assembly (4) to form a rectangular frame structure.

2. The flexible drive lifting device according to claim 1, characterized in that, The main drive mechanism (11) includes: a base plate (111) and the power system. The base plate (111) serves as a support foundation, with the straight line containing the center of its length direction as the central axis (1111). The power system includes: A linear power source (112) is fixed at one end to the base plate (111), and its center line coincides with the central axis (1111). The slider assembly (113) is a linear power source (112) with the other end being a free end, and the slider assembly (113) is connected to it. Two flexible cables (114), two sets of pulleys (115), and two support plates (116) are symmetrically arranged around the central axis (1111). The slider assembly (113) has two earring holes (11331) symmetrically arranged on both sides relative to the central axis (1111). One end of each of the two flexible cables (114) is fixed in one of the two earring holes (11331), and the other end passes around the two sets of pulleys (115) arranged perpendicular to the bottom plate (111) for reversing the direction of the flexible cables (114). The other end is fixedly connected to the two annular grooves (211) of the bottom long shaft (21). The two annular grooves (211) are symmetrically arranged relative to the central axis (1111) and close to the support plate (116). The support plate (116) is used to support the bottom long shaft (21) to slide under the action of the flexible cables (114).

3. The flexible drive lifting device according to claim 2, characterized in that, The central axis of the linear power source (112), the central axes of the two flexible cables (114), and the central axis of the bottom long axis (21) are in a plane that is parallel to the plane of the bottom plate (1112).

4. The flexible drive lifting device according to claim 2, characterized in that, The flexible cable (114) provides a horizontal force to the lifting mechanism (2), and the support plate (116) provides a vertical force to the bottom long shaft (21). The horizontal force and the vertical force are the resultant force on the lifting mechanism (2).

5. A flexible drive lifting device according to claim 2, characterized in that, The secondary drive mechanism (12) includes: Sleeves (121), there are four sleeves (121), which are vertically arranged at the four corners of the base plate (111); And an elastic element (122), each of the sleeves (121) has a corresponding elastic element (122), and the outer diameter of the elastic element (122) matches the inner diameter of the sleeve (121); During the first lifting stroke, the top of the elastic element (122) follows and is in close contact with the cross brace assembly (4).

6. The flexible drive lifting device according to claim 5, characterized in that, The maximum driving force F of the secondary drive mechanism (12) max satisfy: F max =4K·X max <M·g Where K is the elastic coefficient of the elastic element, X max M is the maximum deformation of the elastic element, M is the total mass of the object lifted by the cross brace assembly, guide rail assembly, and lifting mechanism, and g is the acceleration due to gravity.

7. The flexible drive lifting device according to claim 2, characterized in that, The slider assembly (113) includes: The upper slider (1133) has two earring holes (11331) disposed on it. The middle slider (1132) is located at the bottom of the upper slider (1133) and is fixedly connected; the push rod (1121) of the linear power source (112) is connected to the middle slider (1132); The bottom slider (1131) and the middle slider (1132) are fitted together to form a sliding connection pair.

8. A flexible drive lifting device according to claim 5, characterized in that, The guide rail assembly (3) includes: Guide rail (31), two guide rails (31) are arranged parallel to each other along the length direction on the base plate (111), and the two guide rails (31) are connected to the two cross bracing components (4) to form a rectangular frame structure; Limiting plate (32) and positioning plate (33): Each guide rail (31) has a limiting plate (32) at one end and a positioning plate (33) on the inner side of the other end. The positioning plate (33) has a positioning hole (331). The limiting plate (32) and positioning plate (33) are used to fix the lifted items or equipment.

9. A flexible drive lifting device according to claim 8, characterized in that, Each of the said cross brace components (4) includes: A cross brace (41) is connected between the two guide rails (31); The connecting plate (42) has an inner side (311) of the guide rail connected to it. The connecting plate (42) includes a horizontal plate (421) and a vertical plate (422). A recessed platform (4211) is provided below the horizontal plate (421). The central axis of the recessed platform (4211) coincides with the central axis of the elastic element (122). The distance between the concave surface of the recessed platform (4211) and the bottom plate plane (1112) is equal to the shortest height of the elastic element (122) when compressed. Support plate (43), one side of the support plate (43) is fixedly connected to the outer side of the vertical plate (422), and the top surface of the support plate (43) is close to the bottom surface (312) of the guide rail.

10. A flexible drive lifting device according to claim 2, characterized in that, The pulley (115) includes: A pulley base plate (1151) is fixed on the base plate (111), and a flexible cable retainer (1141) is provided thereon; A pulley shaft (1152) is vertically fixed on the pulley base plate (1151), and a wheel (1153) is connected to it via a bearing (1154); The flexible cable retainer (1141) is configured to keep the central axis of the flexible cable (114) parallel to the plane of the base plate (1112) and always wound around the wheel (1153).

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