A five-section lifting column

Abstract

The present invention discloses a five-section lifting column, comprising a lifting assembly and five lifting tubes which are sleeved with each other, wherein the five lifting tubes are, from inside to outside, a first lifting tube, a second lifting tube, a third lifting tube, a fourth lifting tube and a fifth lifting tube, respectively; the lifting assembly is fixed in the third lifting tube, and the lifting assembly comprises an upper transmission assembly, a lower transmission assembly and a driving assembly. In the present invention, different lifting tubes of the five-section lifting columns move upward or downward when the lifting columns are started, so that the five lifting tubes of the five-section lifting columns placed on a table can be visually lifted at the same time, so that the lifting speed of the lifting column is multiple times that of a lifting column with a single screw rod assembly, thereby improving the overall lifting speed of the lifting column.

Description

Technical Field

[0001] The invention belongs to the field of lifting columns, and in particular relates to a five-section lifting column. Background Art

[0002] At present, the driving assembly in the existing lifting column realizes the lifting of the lifting column by driving a single screw rod assembly, which makes the lifting speed of the lifting column too slow, and it takes too long to lift to a specified height, the lifting efficiency is low, and the lifting tube of each section of the lifting column needs to be set long enough to achieve lifting to the set height, so that the length of the lifting column in the retracted state is too long, which is not convenient for storage and transportation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a five-section lifting column that can be lifted and lowered quickly.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: a five-section lifting column, including a lifting assembly and five lifting tubes connected with each other, the five lifting tubes are, from inside to outside, a first lifting tube, a second lifting tube, a third lifting tube, a fourth lifting tube and a fifth lifting tube, the lifting assembly is fixed in the third lifting tube, the lifting assembly includes: an upper transmission assembly, including a connected upper transmission inner screw rod assembly and an upper transmission outer screw rod assembly, the upper transmission inner screw rod assembly is connected to the second lifting tube, used to drive the second lifting tube to rise, the upper transmission outer screw rod assembly is connected to the first lifting tube, used to drive the first lifting tube to rise; a lower transmission assembly, including a connected lower transmission inner screw rod assembly and a lower transmission outer screw rod assembly, the lower transmission outer screw rod assembly is connected to the fourth lifting tube, used to drive the fourth lifting tube to descend, and the lower transmission inner screw rod assembly is connected to the fifth lifting tube, used to drive the fifth lifting tube to descend; a driving assembly, which is respectively connected to the upper transmission assembly and the lower transmission assembly, and is used to simultaneously drive the upper transmission assembly and the lower transmission assembly to operate.

[0005] Furthermore, the upper transmission inner screw assembly includes an upper transmission inner screw connected to the driving assembly and an upper transmission inner nut threadedly connected to the upper transmission inner screw, and the upper transmission inner nut is connected to the second lifting tube.

[0006] Furthermore, the upper transmission external screw assembly includes an upper transmission external screw and an upper transmission external nut threadedly connected to the upper transmission external screw. The upper transmission external screw is sleeved on the upper transmission internal screw and rotates together with the upper transmission internal screw through a spline. The upper transmission external nut is connected to the first lifting tube.

[0007] Furthermore, the first lifting tube includes a first tube body and a top plate arranged on the first tube body, and the upper transmission outer nut is connected to the top plate through the upper transmission tube.

[0008] Furthermore, the lower transmission external screw assembly includes a lower transmission tube connected to the driving assembly, a lower transmission external screw that rotates together with the lower transmission tube through a spline to push the fourth lifting tube down, and a lower transmission external nut threadedly connected to the lower transmission external screw, and the lower transmission external nut is fixed on the third lifting tube.

[0009] Furthermore, the lower transmission inner screw assembly includes a lower transmission inner screw connected to the fifth lifting tube and a lower transmission inner nut threadedly connected to the lower transmission inner screw, the lower transmission outer screw is sleeved on the outside of the lower transmission inner screw, and the lower transmission inner nut is fixed to the bottom of the lower transmission outer screw and is linked to the lower transmission outer screw.

[0010] Furthermore, the driving assembly includes a motor and a reduction gearbox connected to both the upper transmission assembly and the lower transmission assembly.

[0011] Furthermore, the reduction box includes a worm gear device connected to the motor, a first transmission device connected to the upper transmission assembly, and a second transmission device connected to the lower transmission assembly, and the second transmission device and the worm gear device are driven by the first transmission device.

[0012] Furthermore, the worm gear device includes a worm connected to the motor and a worm wheel connected to the worm, the first transmission device includes a first bevel gear connected to the worm wheel, a second bevel gear meshing with the first bevel gear, and a first transmission gear linked to the second bevel gear, and the second transmission device includes a second transmission gear meshing with the first transmission gear.

[0013] Furthermore, the third lifting tube includes a third tube body and a bottom plate arranged at the bottom of the third tube body, and the reduction box is fixed on the bottom plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting a five-section lifting column, when the driving component drives the upper transmission component and the lower transmission component at the same time, the upper transmission inner screw rod component and the upper transmission outer screw rod component of the upper transmission component respectively push the first lifting tube and the second lifting tube upward away from the third lifting tube, and the lower transmission inner screw rod component and the lower transmission outer screw rod component of the lower transmission component respectively push the fourth lifting tube and the fifth lifting tube downward away from the third lifting tube, the first lifting tube and the second lifting tube rise relative to the third lifting tube, and the fourth lifting tube and the fifth lifting tube fall relative to the third lifting tube, and the five lifting tubes of the five-section lifting column placed on the table are visually raised at the same time, so that the lifting speed of the lifting column is multiple times that of the lifting column of a single screw rod component. When the output speed of the screw rod component is low, the overall lifting speed of the lifting column is improved, and the different lifting tubes of the five-section lifting column move upward or downward when the lifting column is started, and the five-section lifting tubes overlap or partially overlap when the lifting column is in a retracted state, and each lifting tube does not need to be set too long to realize the lifting of the lifting column to a set height, that is, to achieve the purpose of low installation distance and high stroke, which is convenient for storage and transportation of the lifting column.

[0016] The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] Figure 1 It is a three-dimensional diagram of a five-section lifting column of the present invention;

[0019] Figure 2 It is a schematic diagram of the lifting assembly;

[0020] Figure 3 Schematic diagram of the connection between the gearbox, upper transmission assembly and lower transmission assembly Figure 1 ;

[0021] Figure 4 Schematic diagram of the connection between the gearbox, upper transmission assembly and lower transmission assembly Figure 2 ;

[0022] Figure 5 A cross-sectional diagram of a five-section lifting column Figure 1 ;

[0023] Figure 6 A cross-sectional diagram of a five-section lifting column Figure 2 . Description of the drawings:

[0025] 110, first lifting tube; 120, second lifting tube; 130, third lifting tube; 140, fourth lifting tube; 150, fifth lifting tube;

[0026] 200, motor;

[0027] 300, reduction box; 311, worm gear; 312, worm; 321, first bevel gear; 322, second bevel gear; 323, first transmission gear; 331, second transmission gear;

[0028] 410, upper transmission inner screw rod; 420, upper transmission inner nut;

[0029] 510, upper transmission outer screw rod; 520, upper transmission outer nut; 530, upper transmission tube;

[0030] 610, lower transmission inner screw rod; 620, lower transmission inner nut;

[0031] 710, lower transmission outer screw rod; 720, lower transmission outer nut; 730, lower transmission tube.

[0032] 810, first spline; 820, second spline. DETAILED DESCRIPTION

[0033] A five-section lifting column comprises a lifting assembly and five lifting tubes which are connected with each other. The five lifting tubes are, from inside to outside, a first lifting tube, a second lifting tube, a third lifting tube, a fourth lifting tube and a fifth lifting tube. The lifting assembly is fixed in the third lifting tube. The lifting assembly comprises: an upper transmission assembly, comprising an upper transmission inner screw rod assembly and an upper transmission outer screw rod assembly which are connected. The upper transmission inner screw rod assembly is connected to the second lifting tube and is used to drive the second lifting tube to rise. The upper transmission outer screw rod assembly is connected to the first lifting tube and is used to drive the first lifting tube to rise; a lower transmission assembly, comprising a lower transmission inner screw rod assembly and a lower transmission outer screw rod assembly which are connected. The lower transmission outer screw rod assembly is connected to the fourth lifting tube and is used to drive the fourth lifting tube to descend. The lower transmission inner screw rod assembly is connected to the fifth lifting tube and is used to drive the fifth lifting tube to descend; and a driving assembly which is respectively connected to the upper transmission assembly and the lower transmission assembly and is used to simultaneously drive the upper transmission assembly and the lower transmission assembly to operate. The present invention provides a five-section lifting column. When the driving component drives the upper transmission component and the lower transmission component at the same time, the upper transmission inner screw rod component and the upper transmission outer screw rod component of the upper transmission component respectively push the first lifting tube and the second lifting tube upward away from the third lifting tube, and the lower transmission inner screw rod component and the lower transmission outer screw rod component of the lower transmission component respectively push the fourth lifting tube and the fifth lifting tube downward away from the third lifting tube, the first lifting tube and the second lifting tube rise relative to the third lifting tube, and the fourth lifting tube and the fifth lifting tube fall relative to the third lifting tube, and the five lifting tubes of the five-section lifting column placed on the table are visually raised at the same time, so that the lifting speed of the lifting column is multiple times that of the lifting column of the single screw rod component. When the output speed of the screw rod component is low, the overall lifting speed of the lifting column is improved, and the different lifting tubes of the five-section lifting column move upward or downward when the lifting column is started, and the five-section lifting tubes overlap or partially overlap when the lifting column is in a retracted state, and each lifting tube does not need to be set too long to realize the lifting of the lifting column to a set height, that is, to achieve the purpose of low installation distance and high stroke, which is convenient for storage and transportation of the lifting column.

[0034] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] Embodiment 1:

[0040] A five-section lifting column, such as Figure 1As shown, it includes a lifting assembly and five lifting tubes that are socketed with each other. The five lifting tubes are, from the inside to the outside, a first lifting tube 110, a second lifting tube 120, a third lifting tube 130, a fourth lifting tube 140 and a fifth lifting tube 150. The lifting assembly is fixed in the third lifting tube 130 and connected to the bottom wall of the third lifting tube 130. The lifting assembly includes an upper transmission assembly, a lower transmission assembly and a drive assembly.

[0041] The driving assembly is connected to the upper transmission assembly and the lower transmission assembly respectively. Figure 2 , Figure 3 and Figure 4 As shown, it is used to drive the upper transmission assembly and the lower transmission assembly to operate simultaneously. In this embodiment, the driving assembly includes a motor 200 that is powered on and rotates, and a reduction box 300 that drives the upper transmission assembly and the lower transmission assembly. The reduction box 300 includes a worm gear device connected to the output shaft of the motor 200. The worm gear device includes a worm 312 connected to the motor 200 and a worm wheel 311 connected to the worm 312. The rotation output by the motor 200 is decelerated, and the rotation speed of the upper transmission assembly and the lower transmission assembly is controlled within a suitable range. The reduction box 300 also includes a first transmission device and a second transmission device. The second transmission device and the worm gear device are driven by the first transmission device, so that the worm gear device can drive the first transmission device and the second transmission device to rotate simultaneously by only being connected to the first transmission device, without being connected to both at the same time, thereby reducing the volume of the worm gear device. Preferably, in this embodiment, the first transmission device includes a first bevel gear 321 keyed to the worm gear 311, a second bevel gear 322 meshing with the first bevel gear 321, and a first transmission gear 323 linked to the second bevel gear 322, and the second transmission device includes a second transmission gear 331 meshing with the first transmission gear 323, and the worm gear device is combined with the meshing first bevel gear 321 and the second bevel gear 322 to adjust the rotation direction of the output shaft of the motor 200 so that the output shaft of the motor 200 is arranged parallel to the upper transmission assembly and the lower transmission assembly.

[0042] In this embodiment, Figure 5 and Figure 6As shown, the upper transmission assembly includes an upper transmission inner screw assembly and an upper transmission outer screw assembly connected to each other. The upper transmission inner screw assembly is connected to the second lifting tube 120, and is used to drive the second lifting tube 120 to rise relative to the third lifting tube 130. The upper transmission outer screw assembly is connected to the first lifting tube 110, and is used to drive the first lifting tube 110 to rise relative to the second lifting tube 120. Among them, the upper transmission inner screw assembly includes an upper transmission inner screw 410 whose bottom is plugged into the second bevel gear 322 and rotates with the second bevel gear 322, and an upper transmission inner nut 420 threadedly connected to the upper transmission inner screw 410. The upper transmission inner nut 420 is fixed on the second lifting tube 120, so that when the upper transmission inner screw 410 rotates, the upper transmission inner nut 420 will axially push the second lifting tube 120 connected to the upper transmission inner nut 420. The upper transmission external screw assembly includes an upper transmission external screw 510 and an upper transmission external nut 520 threadedly connected to the upper transmission external screw 510. The upper transmission external screw 510 is sleeved on the upper transmission internal screw 410. The upper transmission external screw 510 rotates together with the upper transmission internal screw 410 through the first spline 810 at the top. The upper transmission external nut 520 is connected to the first lifting tube 110. Preferably, the first lifting tube 110 includes a first tube body and a top plate arranged on the first tube body. The upper transmission external nut 520 is connected to the top plate through an upper transmission tube 530, and the upper transmission external nut 520 is fixed inside the upper transmission tube 530.

[0043] In this embodiment, the lower transmission assembly includes a connected lower transmission inner screw assembly and a lower transmission outer screw assembly. The lower transmission outer screw assembly is connected to the fourth lifting tube 140, and is used to drive the fourth lifting tube 140 to descend relative to the third lifting tube 130. The lower transmission inner screw assembly is connected to the fifth lifting tube 150, and is used to drive the fifth lifting tube 150 to descend relative to the fourth lifting tube 140. Wherein, the lower transmission outer screw assembly includes a lower transmission tube 730 connected to the second transmission gear 331, a lower transmission outer screw 710 that rotates together with the lower transmission tube 730 to push the fourth lifting tube 140 down, and a lower transmission outer nut 720 that is threadedly connected to the lower transmission outer screw 710. The lower transmission outer nut 720 is fixed on the reduction box 300, that is, the lower transmission outer nut 720 is fixed on the third lifting tube 130. When the lower transmission outer screw 710 rotates, it will push the fourth lifting tube 140 along the axial direction. The lower transmission outer screw 710 can be connected to the bottom wall of the fourth lifting tube 140 through a connecting structure. The lower transmission outer screw 710 and the connecting structure are fixed in the axial direction, but can rotate relatively (the connecting structure can be Figure 6The structure shown in the figure may also be any structure that realizes this function, such as a bearing), so that the lower transmission outer screw 710 does not drive the fourth lifting tube 140 to rotate. The lower transmission inner screw assembly includes a lower transmission inner screw 610 connected to the fifth lifting tube 150 and a lower transmission inner nut 620 threadedly connected to the lower transmission inner screw 610. The lower transmission outer screw 710 is sleeved on the outside of the lower transmission inner screw 610. The lower transmission inner nut 620 is fixed to the bottom of the lower transmission outer screw 710 and linked to the lower transmission outer screw 710. Preferably, the lower transmission tube 730 and the top of the lower transmission outer screw 710 are transmitted through the second spline 820. The lower transmission inner screw 610 can be connected to the bottom wall of the fifth lifting tube 150 through a connecting structure. The lower transmission inner screw 610 and the connecting structure are fixed in the axial direction, but can rotate relative to each other (the connecting structure can be Figure 6 The structure shown in , which may also be any structure that can achieve this function, such as a bearing), makes the lower transmission inner screw rod 610 not drive the fifth lifting tube 150 to rotate.

[0044] The working process of the lifting column is as follows:

[0045] The output shaft of the motor 200 rotates to drive the worm 312 to rotate, and the worm 312 drives the worm wheel 311 to rotate to reduce the rotation speed. The worm wheel 311 drives the first bevel gear 321 to rotate, and the first bevel gear 321 drives the second bevel gear 322 to rotate through meshing. The second bevel gear 322 drives the upper transmission inner screw 410 to rotate coaxially, and the upper transmission inner screw 410 rotates to drive the upper transmission inner nut 420 to move axially along the upper transmission inner screw 410. The upper transmission inner nut 420 drives the second lifting tube 120 to move above the third lifting tube 130 and pushes the upper transmission outer screw 510 upward. When the upper transmission inner screw 410 rotates, the upper transmission outer screw 510 rotates together with the upper transmission inner screw 410, driving the upper transmission outer nut 520 to move axially along the upper transmission outer screw 510. The upper transmission outer nut 520 pushes the first lifting tube 110 upward through the upper transmission tube 530, so that the first lifting tube 110 moves upward relative to the second lifting tube 120.

[0046] When the second bevel gear 322 drives the upper transmission inner screw 410 to rotate, the second bevel gear 322 also drives the first transmission gear 323 coaxially rotating with the second bevel gear 322 to rotate, the first transmission gear 323 drives the second transmission gear 331 meshing with the first transmission gear 323 to rotate, the second transmission gear 331 drives the lower transmission tube 730 to rotate, and the lower rotating tube drives the lower transmission outer screw 710 to rotate through the second spline 820. Because the lower transmission outer nut 720 is fixed to the third lifting tube 130, No up and down movement occurs, so the lower transmission outer screw rod 710 pushes the bottom wall of the fourth lifting tube 140 axially, so that the fourth lifting tube 140 moves below the third lifting tube 130; when the lower transmission outer screw rod 710 rotates, the lower transmission inner nut 620 fixed at the bottom of the lower transmission outer screw rod 710 rotates and descends together with the lower transmission outer screw rod 710, so that the lower transmission inner screw rod 610 pushes the fifth lifting tube 150 axially, so that the fifth lifting tube 150 moves below the fourth lifting tube 140.

[0047] When the fifth lifting tube 150 is disposed on the platform, it visually creates an effect that the first lifting tube 110 , the second lifting tube 120 , the third lifting tube 130 , and the fourth lifting tube 140 simultaneously move upward.

[0048] By setting up five lifting columns, when the driving assembly drives the upper transmission assembly and the lower transmission assembly at the same time, the upper transmission inner screw assembly and the upper transmission outer screw assembly of the upper transmission assembly respectively push the first lifting tube 110 and the second lifting tube 120 upward away from the third lifting tube 130, and the lower transmission inner screw assembly and the lower transmission outer screw assembly of the lower transmission assembly respectively push the fourth lifting tube 140 and the fifth lifting tube 150 downward away from the third lifting tube 130, the first lifting tube 110 and the second lifting tube 120 rise relative to the third lifting tube 130, and the fourth lifting tube 140 and the fifth lifting tube 150 rise relative to the third lifting tube 130. The tube 130 descends, and the five lifting tubes of the five-section lifting column placed on the table are visually raised at the same time, so that the lifting speed of the lifting column is many times that of the lifting column of a single screw assembly. When the output speed of the screw assembly is low, the overall lifting speed of the lifting column is improved, and the different lifting tubes of the five-section lifting column move upward or downward when the lifting column is started. When the lifting column is in a retracted state, the five lifting tubes overlap or partially overlap. Each lifting tube does not need to be set too long to realize the lifting of the lifting column to the set height, that is, the purpose of low installation distance and high stroke is achieved, which is convenient for the storage and transportation of the lifting column.

[0049] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A five-section lifting column, characterized in that: The invention comprises a lifting assembly and five lifting tubes connected with each other, wherein the five lifting tubes are a first lifting tube, a second lifting tube, a third lifting tube, a fourth lifting tube and a fifth lifting tube from the inside to the outside, and the lifting assembly is fixed in the third lifting tube. The lifting assembly comprises: An upper transmission assembly, comprising an upper transmission inner screw assembly and an upper transmission outer screw assembly connected to each other, wherein the upper transmission inner screw assembly is connected to the second lifting tube and used to drive the second lifting tube to rise, and the upper transmission outer screw assembly is connected to the first lifting tube and used to drive the first lifting tube to rise; A lower transmission assembly, comprising a lower transmission inner screw assembly and a lower transmission outer screw assembly connected to each other, wherein the lower transmission outer screw assembly is connected to the fourth lifting tube and used to drive the fourth lifting tube to descend, and the lower transmission inner screw assembly is connected to the fifth lifting tube and used to drive the fifth lifting tube to descend; The driving assembly is connected to the upper transmission assembly and the lower transmission assembly respectively, and is used to drive the upper transmission assembly and the lower transmission assembly to operate simultaneously; the upper transmission inner screw assembly includes an upper transmission inner screw connected to the driving assembly and an upper transmission inner nut threadedly connected to the upper transmission inner screw, and the upper transmission inner nut is connected to the second lifting tube; the lower transmission outer screw assembly includes a lower transmission tube connected to the driving assembly, a lower transmission outer screw that rotates with the lower transmission tube through a spline to push the fourth lifting tube to descend, and a lower transmission outer nut threadedly connected to the lower transmission outer screw, and the lower transmission outer nut is fixed on the third lifting tube, the lower transmission inner screw assembly includes a lower transmission inner screw connected to the fifth lifting tube and a lower transmission inner nut threadedly connected to the lower transmission inner screw, the lower transmission outer screw is sleeved on the outside of the lower transmission inner screw, and the lower transmission inner nut is fixed to the bottom of the lower transmission outer screw and is linked to the lower transmission outer screw; The driving assembly includes a motor and a reduction box connected to both the upper transmission assembly and the lower transmission assembly; The reduction box comprises a worm gear device connected to the motor, a first transmission device connected to the upper transmission assembly, and a second transmission device connected to the lower transmission assembly. The second transmission device and the worm gear device are driven by the first transmission device.

2. A five-section lifting column according to claim 1, characterized in that: The upper transmission outer screw assembly includes an upper transmission outer screw and an upper transmission outer nut threadedly connected to the upper transmission outer screw. The upper transmission outer screw is sleeved on the upper transmission inner screw and rotates together with the upper transmission inner screw through a spline. The upper transmission outer nut is connected to the first lifting tube.

3. A five-section lifting column according to claim 2, characterized in that: The first lifting tube includes a first tube body and a top plate arranged on the first tube body, and the upper transmission outer nut is connected to the top plate through the upper transmission tube.

4. The five-section lifting column according to claim 1, characterized in that: The worm gear device includes a worm connected to the motor and a worm wheel connected to the worm, the first transmission device includes a first bevel gear connected to the worm wheel, a second bevel gear meshing with the first bevel gear, and a first transmission gear linked to the second bevel gear, and the second transmission device includes a second transmission gear meshing with the first transmission gear.

5. The five-section lifting column according to claim 1, characterized in that: The third lifting tube comprises a third tube body and a bottom plate arranged at the bottom of the third tube body, and the reduction box is fixed on the bottom plate.

Images