Transmission mechanism facilitating assembly, lifting transmission method of support base and support base

Abstract

The application discloses a transmission mechanism convenient to assemble, a support base lifting transmission method and a support base, which comprise a base, an internal cable integrated in the base, an intelligent control system arranged in the base and electrically connected with an external power supply through the cable, and a lifting column, which is specifically a transmission mechanism convenient to assemble; a top platform is arranged at the top end of the lifting column and used for supporting and placing a unit to be moved; the intelligent control system is electrically connected with SMA wires and used for controlling the operation of the transmission mechanism. The application utilizes phase change contraction of the SMA wires as a driving force, utilizes solid-liquid phase change of LMPA composite materials as a locking mechanism, and achieves a transmission purpose through intrinsic characteristic change of the materials, so that the structure and the number of parts are greatly simplified, the assembly process is only plug-in and locking, precise centering is not needed, the requirement for the skill of workers is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of support base manufacturing technology, specifically to a transmission mechanism that is easy to assemble, a support base lifting transmission method, and a support base. Background Technology

[0002] As a core functional component that supports and drives the precise vertical displacement of loads such as monitors, medical equipment, and industrial instruments, the lifting bracket base has always faced multiple challenges in its technological development, including balancing structural complexity, operational performance, manufacturing cost, and reliability.

[0003] Currently, the mainstream lifting transmission technologies can be divided into the following three categories:

[0004] Mechanical lead screw drive: This system uses a rotary motor to drive a worm gear or gear set, converting rotary motion into linear motion of the nut on the lead screw, thereby achieving lifting and lowering. Because the system consists of numerous independent precision parts such as the motor, gears, bearings, lead screw, nut, and housing, it is complex in structure, bulky overall, and requires cumbersome assembly. Precise alignment and adjustment are necessary. Furthermore, to maintain the position, the motor must be continuously powered to provide holding torque, resulting in high energy consumption. There is also a risk of falling due to self-locking failure at the moment of power failure.

[0005] Hydraulic / pneumatic drive: This system uses an external pump station to generate fluid pressure, which drives a piston in a hydraulic or pneumatic cylinder to move linearly. The system consists of numerous components such as pumps, valves, cylinders, seals, and piping, and is prone to fluid leakage, causing environmental pollution and requiring frequent maintenance.

[0006] Integrated electric linear actuators: These integrate the motor and transmission mechanism into a cylindrical housing, improving structural compactness. However, they are essentially miniaturized and encapsulated mechanical transmissions, and do not fundamentally eliminate the inherent wear, noise, and high energy consumption problems of mechanical transmissions.

[0007] With the development of smart materials technology, new drive materials such as shape memory alloys (SMA) have provided new ideas for solving the above problems. Most existing SMA actuators still use the simple mode of "SMA drive + mechanical spring reset" and rely on external guiding mechanisms, transmission conversion mechanisms and independent mechanical locking devices. In essence, smart materials replace motors, but they have not been able to get rid of their dependence on traditional mechanical structures.

[0008] In view of this, the present invention proposes a transmission mechanism based on integrated smart materials, which deeply integrates driving, transmission and locking functions into a single material structure to achieve multiple requirements such as silent operation, zero static power consumption maintenance, power failure safety self-locking and rapid assembly. Summary of the Invention

[0009] To address the aforementioned technical problems, the present invention provides a transmission mechanism that is easy to assemble, specifically a lifting column, comprising:

[0010] The elastic core layer constitutes the flexible hinge body;

[0011] Two sets of low-melting-point alloy composite material layers are respectively set on the upper and lower sides of the elastic core layer;

[0012] At least one set of structural reinforcement layers is laminated on the outside of the low-melting-point alloy composite material layer;

[0013] Several sets of SMA wires are symmetrically embedded inside two sets of low melting point alloy composite material layers and extend along the length of the lifting column.

[0014] The elastic core layer is provided with a serpentine groove, which guides the elastic core layer to bend and deform along the serpentine groove when several sets of SMA filaments are energized and contracted.

[0015] Furthermore, in the technical solution of the present invention, the low melting point alloy composite material layer comprises a mixture of low melting point alloy particles and an elastic polymer matrix, wherein the volume percentage of the low melting point alloy particles and the elastic polymer matrix is ​​39% to 43%: 57% to 61%.

[0016] Furthermore, in the technical solution of this invention, the particle size of the low-melting-point alloy is 50-100 μm, and the low-melting-point alloy is specifically Bi. 32.5 In 51 Sn 16.5 Bi 32.5 Pb 18 Sn 12 Cd 21 Bi 58 Sn 42 Any one of them.

[0017] Furthermore, in the technical solution of the present invention, the elastic polymer matrix is ​​high-temperature vulcanized silicone rubber or high-performance thermoplastic polyurethane.

[0018] Furthermore, in the technical solution of this invention, the manufacturing process of the lifting column includes the following steps:

[0019] High-temperature vulcanized silicone rubber is mixed using a two-roll mill or internal mixer, calendered into uniform sheets of the required thickness, and then cut to obtain the elastic core layer.

[0020] Low-melting-point alloy particles are mixed with an elastic polymer matrix in a vacuum planetary mixer, and then rolled or molded into thin sheets, which are then cut to obtain a low-melting-point alloy composite material layer.

[0021] Prepreg is prepared by solution impregnation or hot-melt method. Aramid plain weave fabric is passed through a resin tank, the resin content is controlled, and then dried and wound to obtain a roll of prepreg. When used, it is cut to size to obtain a structural reinforcement layer.

[0022] The adhesive is epoxy resin or silicone rubber, and the volume fraction of aramid plain weave fabric is 50% to 60%.

[0023] Cut SMA wire to the designed length and pre-stretch it on the fixture with a pre-strain of 3% to 4%.

[0024] Place the cut materials into the mold in sequence, from bottom to top: structural reinforcement layer - low melting point alloy composite material layer - elastic core layer - low melting point alloy composite material layer - structural reinforcement layer. When laying the low melting point alloy composite material layer, lay the pre-stretched SMA filament bundles symmetrically along the central axis of the cross section on the outside of the low melting point alloy composite material layer. Seal the mold, and after lamination and curing at 170-180℃ and 0.5-0.7 MPa, cool and demold to obtain the lifting column blank.

[0025] The mold is a specially made mating mold, including an upper mold and a lower mold. The lower mold has serpentine protrusions inside, which simultaneously form serpentine through grooves during the lamination process.

[0026] After trimming the burrs and trimming the edges, a multimeter was used to test the resistance and continuity of all SMA filament bundles to obtain the lifting column.

[0027] A method for lifting and lowering a support base, utilizing the aforementioned easily assembled transmission mechanism, includes the following steps:

[0028] Electric heating is applied to the low-melting-point alloy composite layer and SMA wire;

[0029] The low-melting-point alloy composite material layer softens after heating, and the SMA wire shrinks after heating, pulling the lifting column to bend along the serpentine groove, thereby adjusting the height of the top of the lifting column.

[0030] After the power is cut off, the low-melting-point alloy composite material layer cools and hardens, locking the lifting column in the deformed position and completing the lifting transmission.

[0031] A support base, comprising:

[0032] The base has integrated cables inside;

[0033] The intelligent control system is located inside the base and is electrically connected to an external power source via a cable.

[0034] The lifting column is specifically the aforementioned transmission mechanism that is easy to assemble;

[0035] The top platform, located at the top of the lifting column, is used to support and place the unit to be moved.

[0036] The intelligent control system is electrically connected to the SMA wire and is used to control the operation of the transmission mechanism.

[0037] Furthermore, in the technical solution of the present invention, the lifting column is an integrated structure made using a composite material lamination process.

[0038] Furthermore, in the technical solution of the present invention, the intelligent control system includes: a main control unit integrated on the main control board, an SMA drive circuit, a low melting point alloy composite material layer drive circuit, a temperature sensor, a position sensor, a current sensor, a human-machine interface, and a power management module. By controlling the heating power and heating time of the SMA and the low melting point alloy composite material layer, the height adjustment of the top platform is realized.

[0039] Effective gain

[0040] In the technical solution of this invention, the "phase change shrinkage" of SMA wire is used as the driving force, and the "solid-liquid phase change" of LMPA composite material is used as the locking mechanism. The transmission purpose is achieved through the change of the intrinsic properties of the material, which replaces the kinetic energy transmission that relies on the mechanical meshing and motion conversion of rigid parts such as motors, gears, and lead screws in traditional technology. This greatly simplifies the structure and the number of parts. The assembly process is only plugging and locking, without the need for precise alignment, which reduces the requirements for workers' skills and improves production efficiency.

[0041] By using composite material lamination technology, functional units such as driving, locking, transmission, and structural reinforcement are integrated into the lifting column during the manufacturing process, deeply integrating driving, transmission, and locking functions into a single material structure, thus achieving a high functional density.

[0042] Finally, the transmission mechanism operates without component impact or friction, enabling silent lifting. Furthermore, it operates without friction or wear, requires no lubrication, and has extremely low maintenance requirements throughout its lifespan, significantly reducing operating costs and downtime. In the event of a power failure, the LMPA automatically solidifies and locks, and the system automatically enters a safety lock state, maintaining the position with zero energy consumption and enhanced safety.

[0043] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0044] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the support base structure of the present invention;

[0046] Figure 2 This is a schematic diagram of the cross-sectional structure of the transmission mechanism of the present invention;

[0047] Figure 3 This is a schematic diagram of the mold structure of the present invention;

[0048] Figure 4 This is a schematic diagram of the control process of the intelligent control system of the present invention.

[0049] The components include: 1. base; 2. intelligent control system; 3. lifting column; 31. elastic core layer; 32. low melting point alloy composite material layer; 33. structural reinforcement layer; 34. SMA wire; 35. serpentine groove; 4. top platform; 5. mold; 51. upper mold; 52. lower mold; and 53. serpentine protrusion. Detailed Implementation

[0050] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0051] One aspect of this invention is a transmission mechanism that is easy to assemble, including a lifting column 3.

[0052] Please see Figure 2 The lifting column 3 includes an elastic core layer 31, forming a flexible hinge body. Low-melting-point alloy composite material layers 32 are respectively provided on the upper and lower sides of the elastic core layer 31. At least one set of low-melting-point alloy composite material layers 32 has a structural reinforcement layer 33 on the side opposite to the elastic core layer 31. Several sets of SMA wires 34 are pre-installed within the two sets of low-melting-point alloy composite material layers 32. The sets of SMA wires 34 are symmetrically arranged along the central axis of the lifting column 3's cross-section and extend along the length of the lifting column 3. A serpentine groove 35 is provided on the elastic core layer 31, which guides the elastic core layer 31 to bend and deform when the sets of SMA wires 34 are energized and contract.

[0053] The low-melting-point alloy composite layer 32 (LMPA) comprises a mixture of low-melting-point alloy particles and an elastic polymer matrix, with a volume percentage of 39%–43%:57%–61% for the low-melting-point alloy particles and the elastic polymer matrix. The low-melting-point alloy particles have a particle size of 50–100 μm, and the low-melting-point alloy is specifically Bi. 32.5 In 51Sn 16.5 Bi 32.5 Pb 18 Sn 12 Cd 21 Bi 58 Sn 42 Any of the following. The elastic polymer matrix is ​​high-temperature vulcanized silicone rubber or high-performance thermoplastic polyurethane.

[0054] In this embodiment, Bi 32.5 In 51 Sn 16.5 Selected from Hunan Bismuth Science & Technology Co., Ltd., model number Field's Metal; Bi 32.5 Pb 18 Sn 12 Cd 21 Selected from Belmont Metals, model Cerrolow 136; Bi 58 Sn 42 Selected from Yunnan Zhongyin New Materials Co., Ltd., model number Bi 58 Sn 42 The atomized spherical powder; the high-temperature vulcanized silicone rubber is selected from Bluestar Organosilicon, with the model being any one of R-1040, R-1050, or R-1070; the high-performance thermoplastic polyurethane is selected from Wanhua Chemical, with the model being Wanthane®.

[0055] In this embodiment, the specific parameters of the serpentine groove 35 are as follows: the groove depth in the region of the elastic core layer 31 is 60% to 80% of the total thickness of the elastic core layer 31, the groove width is 0.5-1.0 mm, the arc radius is 0.3-0.5 mm, the amplitude is 6-12 mm, and the wave pitch is 8-15 mm.

[0056] Understandably, the elastic core layer is 1.5-3.0 mm thick, enabling the main body to bend and deform; the low-melting-point alloy composite material layer is 0.8-1.5 mm thick, accommodating and fixing the SMA filament bundles, enabling stiffness changes, and transferring load after locking; the structural reinforcement layer is 0.1-0.2 mm thick per layer, using 1-2 layers, with a total thickness of 0.2-0.5 mm, providing axial tensile strength, limiting radial expansion, and providing lateral stability.

[0057] Furthermore, the manufacturing process of the lifting column 3 includes the following steps:

[0058] ① The silicone rubber is mixed by a two-roll mill or internal mixer, and then calendered into a uniform sheet of the required thickness. The sheet is then cut to obtain the elastic core layer 31.

[0059] The high-temperature vulcanized silicone rubber is selected from Hoshine Silicon Industry, and its model is HSR 700 series.

[0060] ② The low-melting-point alloy particles and the elastic polymer matrix are mixed in a vacuum planetary mixer in a certain proportion, and then formed into thin sheets by calendering or molding. The sheets are then cut to obtain the low-melting-point alloy composite material layer 32.

[0061] ③ Prepreg is prepared by solution impregnation or hot melt method. Aramid plain weave fabric is passed through resin tank, the glue content is controlled, and then dried and rolled up to obtain rolls of prepreg. When used, it is cut to size and stacked 1-2 layers to obtain structural reinforcement layer 33.

[0062] The adhesive is epoxy resin or silicone rubber, and the volume fraction of aramid plain weave fabric is 50% to 60%.

[0063] In this embodiment, the epoxy resin is selected from Shanghai Polymer New Materials, model J-201 / J-202 series; the silicone rubber is selected from Bluestar Organosilicon, model R-1040 series; and the plain weave fabric is selected from Taihe New Materials, model TAP-100-PW-120.

[0064] ④ Cut SMA wire 34 to the designed length and pre-stretch it on the fixture with a pre-strain of 3% to 4%;

[0065] In this embodiment, the SMA wire 34 has a diameter of 0.15-0.30 mm, is made of nickel-titanium binary alloy or nickel-titanium-copper ternary alloy, has a pre-strain of 3% to 4%, and is coated with an external polyimide insulating coating.

[0066] Using a universal testing machine, clamp both ends of the SMA wire 34 onto the machine's fixtures and stretch the material to 3%–4% of its original length at a tensile speed of 0.5–1 mm / min, then stop stretching. Maintain this strain state and heat to 120–150°C, holding for 5–10 minutes. After holding at this temperature, allow it to cool to room temperature while still under tension to complete the pre-strain of the SMA wire 34.

[0067] ⑤ Place the cut materials into mold 5 in sequence, from bottom to top: structural reinforcement layer - low melting point alloy composite material layer - elastic core layer - low melting point alloy composite material layer - structural reinforcement layer. When laying the low melting point alloy composite material layer, lay the pre-stretched SMA filament bundles symmetrically along the central axis of the cross section on the outside of the low melting point alloy composite material layer. Seal the mold, and after lamination and curing at 170-180℃ and 0.5-0.7 MPa, cool and demold to obtain the lifting column blank.

[0068] Specifically, the lamination and curing process is as follows:

[0069] Heating phase: Increase the temperature to 170-180℃ at a rate of 2-5°C / min.

[0070] Pressurization stage: During the heating process, when the temperature rises to 90-100℃ and the resin begins to flow, apply a curing pressure of 0.5-0.7 MPa.

[0071] Heat preservation and pressure holding stage: Maintain the curing temperature and pressure for 120-180 minutes to allow the resin to fully cross-link and cure.

[0072] Cooling and depressurization stage: Allow the temperature to cool naturally to below 60°C, then depressurize and remove the mold.

[0073] ⑥ After trimming the burrs and flash, use a multimeter to test the resistance and continuity of all SMA filament bundles to obtain the lifting column.

[0074] Please see Figure 3 Mold 5 is a specially made mating mold, including upper mold 51 and lower mold 52. The lower mold 52 has serpentine protrusions 53 inside, which simultaneously form serpentine grooves 35 during the lamination process.

[0075] Specifically, when the mold is closed, the serpentine protrusion 53 first presses against the upper structural reinforcement layer 33. Under immense pressure, the upper structural reinforcement layer 33 and the low-melting-point alloy composite material layer 32 undergo plastic deformation and flow outwards, thus clearing the position of the serpentine protrusion 53. The serpentine protrusion 53 continues to move downwards and finally presses into the elastic core layer 31. Due to the good fluidity of the elastic core layer 31 material under high temperature conditions, it is squeezed around the protrusion, thus forming a clear serpentine groove 35. While maintaining pressure, the mold is heated. The resin of the reinforcement layer, the silicone of the elastic core layer, and the matrix of the LMPA layer simultaneously undergo cross-linking and curing. During the curing process, the LMPA composite material and reinforcement layer material squeezed around the protrusion permanently maintain their deformed state. At the same time, the materials of each layer diffuse and permeate into each other under high temperature and high pressure, forming a strong interfacial bond. After cooling, the mold is opened, and the product is removed. The serpentine groove 35 has been permanently formed on the elastic core layer 31, while the outer low-melting-point alloy composite material layer 32 and structural reinforcement layer 33 perfectly cover the elastic core layer 31, and the outer layer material also maintains the corresponding shape at the corresponding slot position.

[0076] Another aspect of the present invention provides a support base including the aforementioned easily assembled transmission mechanism, and further includes...

[0077] Base 1, with integrated cables inside;

[0078] The intelligent control system 2 is installed inside the base 1 and is electrically connected to an external power supply via a cable;

[0079] The top platform 4 is set at the top of the lifting column 3 and is used to support and place the unit to be moved.

[0080] The intelligent control system 2 is electrically connected to the SMA wire 34 and is used to control the operation of the transmission mechanism.

[0081] Specifically, the intelligent control system 2 includes a main control unit integrated on the main control board, responsible for running control algorithms, processing sensor data, and sending instructions to the drive circuit; an SMA drive circuit, which controls the average power and heating temperature applied to the SMA wire; a low-melting-point alloy composite material layer drive circuit, which controls the heating of the LMPA composite material layer, and is independently controlled with the SMA drive circuit to achieve timing coordination; a temperature sensor, using thermocouples or digital temperature sensors, closely attached to the SMA wire and LMPA layer to monitor the temperature in real time; a position sensor, specifically any one of a linear encoder, laser rangefinder, or ultrasonic sensor, used to detect the actual height of the top platform; a current sensor, which can determine whether the circuit is working properly by monitoring the current flowing through the SMA wire; a human-machine interface, used to set the lifting height, display the current status such as height and temperature, and perform manual control; and a power management module, which provides a stable power supply with different voltages for the entire system.

[0082] It should be noted that the lifting column 3 is a finished product. The assembly can be completed by fixing the upper and lower ends of the lifting column 3 to the base 1 and the top platform 4 respectively by plugging and locking.

[0083] This invention also proposes a lifting transmission method for a support base. Using the aforementioned support base, the lifting height is set through a human-machine interface. The main control unit processes sensor data and sends instructions to the drive circuit. The low-melting-point alloy composite material layer drive circuit controls the heating of the LMPA composite material layer, causing the low-melting-point alloy composite material layer 32 to soften. The SMA drive circuit controls the heating of the SMA wire. The SMA wire contracts when heated and pulls the lifting column 3 to bend along the serpentine groove 35, adjusting the top height of the lifting column 3. After the position sensor detects that the corresponding height has been reached, the main control unit cuts off all heating circuits, the low-melting-point alloy composite material layer 32 cools and hardens, and the lifting column 3 is locked in the deformed position, completing the lifting transmission.

[0084] In summary, this invention provides an easy-to-assemble transmission mechanism, a lifting transmission method for a support base, and a support base. Through a human-machine interface, the lifting height is set. The main control unit processes sensor data and sends commands to the drive circuit. The low-melting-point alloy composite material layer drive circuit controls the heating of the LMPA composite material layer, softening the low-melting-point alloy composite material layer 32. The SMA drive circuit controls the heating of the SMA filaments. The SMA filaments contract under heat, pulling the lifting column 3 along the serpentine groove 35 to produce bending deformation, thus adjusting the top height of the lifting column 3. After the position sensor detects that the corresponding height has been reached, the main control unit cuts off all heating circuits, allowing the low-melting-point alloy composite material layer 32 to cool and harden, locking the lifting column 3 in the deformed position, completing the lifting transmission. The "phase change contraction" of the SMA filaments serves as the driving force, and the "solid-liquid phase change" of the LMPA composite material serves as the locking mechanism, achieving the transmission purpose through changes in the intrinsic properties of the materials.

[0085] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmission mechanism that is easy to assemble, specifically a lifting column (3), characterized in that, include: The elastic core layer (31) constitutes the flexible hinge body; Two sets of low-melting-point alloy composite material layers (32) are respectively disposed on the upper and lower sides of the elastic core layer (31); At least one set of structural reinforcement layers (33) is laminated on the outside of the low melting point alloy composite material layer (32); Several sets of SMA wires (34) are symmetrically embedded inside the two sets of low melting point alloy composite material layers (32) and extend along the length direction of the lifting column (3); The elastic core layer (31) is provided with a serpentine groove (35), which guides the elastic core layer (31) to bend and deform when several sets of SMA filaments (34) are energized and contracted.

2. The easily assembled transmission mechanism according to claim 1, characterized in that, The low-melting-point alloy composite layer (32) comprises a mixture of low-melting-point alloy particles and an elastic polymer matrix, wherein the volume percentage of the low-melting-point alloy particles to the elastic polymer matrix is ​​39%–43%: 57%–61%.

3. The easily assembled transmission mechanism according to claim 2, characterized in that, The low-melting-point alloy particles have a particle size of 50-100 μm, and the low-melting-point alloy particles are specifically Bi. 32.5 In 51 Sn 16.5 Bi 32.5 Pb 18 Sn 12 Cd 21 Bi 58 Sn 42 Any one of them.

4. The easily assembled transmission mechanism according to claim 2, characterized in that, The elastic polymer matrix is ​​high-temperature vulcanized silicone rubber or high-performance thermoplastic polyurethane.

5. The easily assembled transmission mechanism according to claim 1, characterized in that, The preparation process of the lifting column (3) includes the following steps: ① The high-temperature vulcanized silicone rubber is mixed by a two-roll mill or internal mixer, and then calendered into a uniform sheet of the required thickness. The sheet is then cut to obtain the elastic core layer. ② Mix low-melting-point alloy particles with an elastic polymer matrix in a vacuum planetary mixer in a certain proportion, and then roll or mold them into thin sheets. Cut the sheets to obtain a low-melting-point alloy composite material layer. ③ Prepreg is prepared by solution impregnation or hot melt method. Aramid plain weave fabric is passed through resin tank, the resin content is controlled, and then dried and rolled up to obtain rolls of prepreg. When used, it is cut to size to obtain structural reinforcement layer. The adhesive is epoxy resin or silicone rubber, and the volume fraction of aramid plain weave fabric is 50% to 60%. ④ Cut the SMA wire to the designed length and pre-stretch it on the fixture with a pre-strain of 3% to 4%; ⑤ Place the cut materials into the mold (5) in order from bottom to top: structural reinforcement layer - low melting point alloy composite material layer - elastic core layer - low melting point alloy composite material layer - structural reinforcement layer. When laying the low melting point alloy composite material layer, lay the pre-stretched SMA wire symmetrically along the central axis of the cross section on the outside of the low melting point alloy composite material layer. Close the mold, and after lamination and curing at 170-180℃ and 0.5-0.7 MPa, cool and demold to obtain the lifting column blank. Among them, the mold (5) is a specially made mating mold, including an upper mold (51) and a lower mold (52). The lower mold (52) has a serpentine protrusion (53) inside, which simultaneously forms a serpentine groove during the lamination process. ⑥ After trimming the burrs and flash, use a multimeter to test the resistance and continuity of all SMA wires to obtain the lifting column.

6. A support base, characterized in that, include: The base (1) has an integrated cable inside; The intelligent control system (2) is installed inside the base (1) and is electrically connected to an external power supply via a cable; The lifting column (3) is specifically the easy-to-assemble transmission mechanism described in any one of claims 1-5; The top platform (4) is set at the top of the lifting column (3) and is used to support and place the unit to be moved; The intelligent control system (2) is electrically connected to the SMA wire (34) and is used to control the operation of the transmission mechanism.

7. The bracket base according to claim 6, characterized in that, The intelligent control system (2) includes: a main control unit integrated on the main control board, an SMA drive circuit, a low melting point alloy composite material layer drive circuit, a temperature sensor, a position sensor, a current sensor, a human-machine interface and a power management module. The height of the top platform (4) is adjusted by controlling the heating power and heating time of the SMA wire and the low melting point alloy composite material layer.

8. A method for lifting and lowering a support base, characterized in that, The bracket base as described in claim 7 includes the following steps: The lifting height is set through the human-machine interface. The main control unit processes the sensor data and sends instructions to the drive circuit, namely the low melting point alloy composite material layer drive circuit, to control the heating of the low melting point alloy composite material layer (32) so that the low melting point alloy composite material layer (32) softens. The SMA drive circuit controls the heating of the SMA wire. The SMA wire shrinks when heated and pulls the lifting column (3) to bend along the serpentine groove (35) to adjust the height of the top platform (4). After the position sensor detects that the top platform (4) has reached the corresponding height, the main control unit cuts off all heating circuits, the low melting point alloy composite material layer (32) cools and hardens, and locks the lifting column (3) in the deformed position to complete the lifting transmission.

Images