WO2021023166A1

WO2021023166A1 - Five-segment lifting column

Info

Publication number: WO2021023166A1
Application number: PCT/CN2020/106671
Authority: WO
Inventors: 王林; 裘凯锋
Original assignee: 浙江捷昌线性驱动科技股份有限公司
Priority date: 2019-08-02
Filing date: 2020-08-03
Publication date: 2021-02-11
Also published as: CN110467127A

Abstract

Disclosed is a five-segment lifting column, comprising a lifting assembly and five lifting pipes that are mutually connected in a sleeved manner, wherein the five lifting pipes are sequentially a first lifting pipe (110), a second lifting pipe (120), a third lifting pipe (130), a fourth lifting pipe (140), and a fifth lifting pipe (150) from inside to outside; and the lifting assembly is fixed in the third lifting pipe (130), and the lifting assembly comprises: an upper transmission assembly, a lower transmission assembly, and a driving assembly. Different lifting pipes of the five-segment lifting column move upwards or downwards when the lifting column is started, and the five lifting pipes of the five-segment lifting column placed on a platform face achieve visual synchronous ascent, such that the lifting speed of the lifting column is many times as much as that of a lifting column with a single lead screw assembly, thereby increasing the overall lifting speed of the lifting column.

Description

A five-section lifting column

Technical field

The invention belongs to the field of lifting columns, and specifically relates to a five-section lifting column.

Background technique

At present, the driving assembly in the existing lifting column drives a single screw assembly to realize the lifting of the lifting column, so that the lifting speed of the lifting column is too slow, the lifting to the specified height takes too long, the lifting efficiency is low, and the lifting Each section of the lifting tube of the lifting column is set long enough to realize the lifting to the set height, so that the length of the lifting column in the contracted state is too long, which is not convenient for storage and transportation.

Summary of the invention

The technical problem to be solved by the present invention is to provide a fast-lifting five-section lifting column.

In order 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 sleeved lifting tubes, the five lifting tubes are the first lifting tube and the second lifting tube from the inside to the outside. The lifting tube, the third lifting tube, the fourth lifting tube and the 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 assembly and an upper transmission outer The screw assembly, the upper transmission inner screw assembly is connected with the second lifting tube, and is used to drive the second lifting tube up, and the upper transmission outer screw assembly is connected with the first lifting tube, and is used to drive the first lifting tube up; The 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 pipe for driving the fourth lifting pipe down. The lower transmission inner screw assembly is connected to the fifth The lifting pipes are connected to drive the fifth lifting pipe to descend; the driving components are respectively connected with the upper transmission component and the lower transmission component, and are used to simultaneously drive the upper transmission component and the lower transmission component to operate.

Further, the upper transmission inner screw assembly includes an upper transmission inner screw connected to the drive assembly and an upper transmission inner nut threadedly connected with the upper transmission inner screw, and the upper transmission inner nut is connected with the second lifting pipe.

Further, the upper transmission outer screw assembly includes an upper transmission outer screw and an upper transmission outer nut threadedly connected with the upper transmission outer screw. The upper transmission outer screw is sleeved on the upper transmission inner screw and is connected to the upper transmission through a spline. The moving inner screw rod rotates together, and the upper driving outer nut is connected with the first lifting pipe.

Further, the first lifting pipe includes a first pipe body and a top plate arranged on the first pipe body, and the upper transmission outer nut is connected with the top plate through the upper transmission pipe.

Further, the lower transmission outer screw assembly includes a lower transmission tube connected to the drive assembly, a lower transmission outer screw that rotates with the lower transmission tube through a spline to push the fourth lifting tube down, and a threaded connection with the lower transmission outer screw. The lower transmission outer nut is fixed on the third lifting pipe.

Further, 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 with the lower transmission inner screw, and the lower transmission outer screw is sleeved on the lower transmission inner screw On the outside, the lower transmission inner nut is fixed at the bottom of the lower transmission outer screw rod and is linked with the lower transmission outer screw rod.

Further, the drive assembly includes a motor and a reduction box connected with the upper transmission assembly and the lower transmission assembly at the same time.

Further, the reduction box includes a worm gear connected with the motor, a first transmission connected with the upper transmission assembly, and a second transmission connected with the lower transmission assembly. The second transmission and the worm gear are transmitted through the first transmission. .

Further, the worm gear 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 with the worm gear, a second bevel gear meshed with the first bevel gear, and a second bevel gear. The first transmission gear is linked by gears, and the second transmission device includes a second transmission gear meshed with the first transmission gear.

Further, the third lifting pipe includes a third pipe body and a bottom plate arranged at the bottom of the third pipe body, and the reduction gear box is fixed on the bottom plate.

Compared with the prior art, the beneficial effects of the present invention are:

By setting the five-section lifting column, 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 push the first lifting pipe and the second lifting pipe upward respectively Away from the third lifting pipe, the lower transmission inner screw assembly and the lower transmission outer screw assembly of the lower transmission assembly respectively push the fourth and fifth lifting pipes downward and away from the third lifting pipe, the first lifting pipe and the second lifting pipe The pipe rises relative to the third lifting pipe, and the fourth and fifth lifting pipes descend relative to the third lifting pipe. The five lifting pipes of the five-section lifting column placed on the table realize the visual simultaneous rise, so that the lifting column The lifting speed of the lifting column is multiple 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 increased, and the five-section lifting column with different lifting pipes is activated when the lifting column is started. Move up or down. When the lifting column is in the contracted state, the five-section lifting tube overlaps or partially overlaps. Each lifting tube does not need to be too long to realize the lifting column to the set height, that is, to achieve the purpose of low installation distance and high stroke , It is convenient to store and transport the lifting column.

The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Description of the drawings

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

Figure 1 is a perspective view of a five-section lifting column of the present invention;

Figure 2 is a schematic diagram of the lifting assembly;

Figure 3 is the first schematic diagram of the connection of the gearbox, the upper transmission assembly and the lower transmission assembly;

Figure 4 is the second schematic diagram of the connection of the gearbox, the upper transmission assembly and the lower transmission assembly;

Figure 5 is a schematic cross-sectional view of a five-section lifting column invented;

Fig. 6 is a second sectional view of a five-section lifting column invented.

Description of the drawings:

110, the first elevator tube; 120, the second elevator tube; 130, the third elevator tube; 140, the fourth elevator tube; 150, the fifth elevator tube;

200. Motor;

300. Reducer; 311, worm gear; 312, worm; 321, first bevel gear; 322, second bevel gear; 323, first transmission gear; 331, second transmission gear;

410. Upper transmission inner screw rod; 420. Upper transmission inner nut;

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

610. Lower transmission inner screw rod; 620. Lower transmission inner nut;

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

810, the first spline; 820, the second spline.

detailed description

A five-section lifting column, including a lifting assembly and five lifting tubes connected to each other. The five lifting tubes are the first lifting tube, the second lifting tube, the third lifting tube, the fourth lifting tube and the The fifth lifting tube, the lifting assembly is fixed in the third lifting tube, the lifting assembly includes: the upper transmission assembly, including the upper transmission inner screw assembly and the upper transmission outer screw assembly connected, the upper transmission inner screw assembly and the second The lifting pipes are connected to drive the second lifting pipe to rise, the upper transmission outer screw assembly is connected to the first lifting pipe to drive the first lifting pipe to rise; the lower transmission assembly includes the connected lower transmission inner screw assembly and the lower Transmission outer screw assembly, the lower transmission outer screw assembly is connected with the fourth lifting tube for driving the fourth lifting tube down, and the lower transmission inner screw assembly is connected with the fifth lifting tube for driving the fifth lifting tube down; The driving components are respectively connected with the upper transmission component and the lower transmission component, and are used to simultaneously drive the upper transmission component and the lower transmission component to operate. In the present invention, five-section lifting columns are provided. 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 and the second lifting The pipe moves upward and away from the third lifting pipe. The lower transmission inner screw assembly and the lower transmission outer screw assembly of the lower transmission assembly push the fourth and fifth lifting pipes downward and away from the third lifting pipe, the first lifting pipe and the second lifting pipe, respectively. The second lifting tube rises relative to the third lifting tube, and the fourth lifting tube and the fifth lifting tube descend relative to the third lifting tube. The five lifting tubes of the five-section lifting column placed on the table can rise visually 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 assembly. When the output speed of the screw assembly is low, the overall lifting speed of the lifting column is increased, and the five lifting columns with different lifting tubes are used in the lifting column. When starting, move up or down. When the lifting column is in the retracted state, the five-section lifting pipes overlap or partially overlap. Each lifting pipe does not need to be set too long to realize the lifting column up and down to the set height, that is, low installation distance and high stroke. The purpose is to facilitate the storage and transportation of the lifting column.

The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " “Back”, “Left”, “Right”, “Vertical”, “Horizontal”, “Top”, “Bottom”, “Inner”, “Clockwise”, “Counterclockwise” and other directions or positional relationships are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to the present invention. Limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more than two unless specifically defined otherwise.

In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly defined and defined, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the first feature has a lower level than the second feature.

Example one:

A five-section lifting column, as shown in Figure 1, includes a lifting assembly and five sleeved lifting tubes. The five lifting tubes are the first lifting tube 110, the second lifting tube 120, and the third from the inside to the outside. The lifting pipe 130, the fourth lifting pipe 140 and the fifth lifting pipe 150, the lifting assembly is fixed in the third lifting pipe 130 and connected to the bottom wall of the third lifting pipe 130, the lifting assembly includes an upper transmission assembly and a lower transmission assembly And drive components.

The driving components are respectively connected with the upper transmission component and the lower transmission component, as shown in Figure 2, Figure 3 and Figure 4, for driving the upper transmission component and the lower transmission component to operate at the same time. In this embodiment, the driving assembly includes a motor 200 that is energized to rotate, and a reduction box 300 that drives the upper and lower transmission components. The reduction box 300 includes a worm gear connected to the output shaft of the motor 200. The worm gear includes a worm gear connected to the motor 200. The upper worm 312 and the worm wheel 311 connected to the worm 312 reduce the rotation output of the motor 200, and control the rotation speed of the upper transmission assembly and the lower transmission assembly within an appropriate range. The reduction box 300 also includes a first transmission device and a second transmission device. Two transmission devices, the second transmission device and the worm gear are transmitted by the first transmission device, so that the worm gear and the first transmission device can drive the first transmission device and the second transmission device to rotate at the same time without At the same time, it is connected with both to reduce the volume of the worm gear. 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 linked with the second bevel gear 322. Gear 323, the second transmission device includes a second transmission gear 331 meshing with the first transmission gear 323, the worm gear unit is combined with the meshing first bevel gear 321 and the second bevel gear 322 to rotate the output shaft of the motor 200 The direction is adjusted so that the output shaft of the motor 200 is arranged in parallel with the upper transmission assembly and the lower transmission assembly.

In this embodiment, as shown in Figures 5 and 6, the upper transmission assembly includes an upper transmission inner screw assembly and an upper transmission outer screw assembly that are connected, and the upper transmission inner screw assembly is connected to the second lifting tube 120 for The second lifting pipe 120 is driven to rise relative to the third lifting pipe 130, and the upper transmission outer screw assembly is connected with the first lifting pipe 110 to drive the first lifting pipe 110 to rise relative to the second lifting pipe 120. The upper transmission inner screw assembly includes an upper transmission inner screw 410 whose bottom is inserted on 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 pipe 120, so that when the upper transmission inner screw 410 rotates, the upper transmission inner nut 420 will axially push the second lifting pipe 120 connected to the upper transmission inner nut 420. The upload moving outer screw assembly includes an upper transmission outer screw 510 and an upper transmission outer nut 520 threadedly connected to the upper transmission outer screw 510. The upper transmission outer screw 510 is sleeved on the upper transmission inner screw 410, and the upper transmission outer The screw 510 rotates together with the upper transmission inner screw 410 through the first spline 810 at the top, and the upper transmission outer nut 520 is connected to the first lifting pipe 110. Preferably, the first lifting pipe 110 includes a first pipe body and a device. On the top plate on the first tube body, the upper transmission outer nut 520 is connected to the top plate through the upper transmission tube 530, and the upper transmission outer nut 520 is fixed inside the upper transmission tube 530.

In this embodiment, the lower transmission assembly includes a lower transmission inner screw assembly and a lower transmission outer screw assembly that are connected. The lower transmission outer screw assembly is connected to the fourth lifting pipe 140 for driving the fourth lifting pipe 140 relative to the first The third lifting pipe 130 descends, and the lower transmission inner screw assembly is connected to the fifth lifting pipe 150 for driving the fifth lifting pipe 150 to descend relative to the fourth lifting pipe 140. Wherein, the lower transmission outer screw assembly includes a lower transmission tube 730 connected with 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 screw 710 connected to the lower transmission outer wire. The lower transmission outer nut 720 is threadedly connected to the rod 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 pipe 130, and the lower transmission outer screw 710 rotates along the axis. Pushing the fourth lifting tube 140 toward the lower transmission outer screw rod 710 can be connected to the bottom wall of the fourth lifting tube 140 through the connecting structure, and the lower driving outer screw rod 710 and the connecting structure are fixed in the axial direction, but can be relatively rotated ( The connecting structure may be the structure shown in FIG. 6, or may be any structure that realizes this function, such as a bearing, so that the lower transmission outer screw rod 710 does not drive the fourth lifting pipe 140 to rotate. The lower transmission inner screw rod assembly includes a lower transmission inner screw rod 610 connected to the fifth lifting tube 150 and a lower transmission inner nut 620 threadedly connected to the lower transmission inner screw rod 610, and the lower transmission outer screw rod 710 is sleeved in the lower transmission Outside the screw rod 610, the lower transmission inner nut 620 is fixed at the bottom of the lower transmission outer screw rod 710 and linked with the lower transmission outer screw rod 710. Preferably, the lower transmission tube 730 and the top of the lower transmission outer screw rod 710 pass through the second Spline 820 transmission, the lower transmission inner screw 610 can be connected to the bottom wall of the fifth lifting tube 150 through the connecting structure, the lower transmission inner screw 610 and the connecting structure are fixed in the axial direction, but can be relatively rotated (the connection structure can It is the structure shown in FIG. 6, or it can be any structure that realizes this function, such as a bearing, so that the inner screw rod 610 of the lower transmission does not drive the fifth lifting tube 150 to rotate.

The working process of the lifting column is as follows:

The rotation of the output shaft of the motor 200 drives the worm 312 to rotate. The worm 312 drives the worm gear 311 to rotate to reduce the speed. The worm gear 311 drives the first bevel gear 321 to rotate. The first bevel gear 321 drives the second bevel gear 322 to rotate through meshing. The gear 322 drives the upper transmission inner screw 410 to rotate coaxially, 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, and the upper transmission inner nut 420 drives the second lifting tube 120 moves above the third lifting tube 130 and pushes the upper transmission outer screw 510 upwards. While the upper transmission inner screw 410 rotates, the upper transmission outer screw 510 rotates together with the upper transmission inner screw 410 to drive the upper transmission The outer nut 520 moves upward along the upper transmission outer screw rod 510, and 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 .

While 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 that rotates coaxially with the second bevel gear 322 to rotate, and the first transmission gear 323 drives the The second transmission gear 331 meshed with the transmission gear 323 rotates, the second transmission gear 331 drives the lower transmission tube 730 to rotate, and the lower rotation tube drives the lower transmission outer screw 710 to rotate through the second spline 820, because the lower transmission outer nut 720 is fixed on The third lifting pipe 130 does not move up and down, so the lower transmission outer screw 710 pushes the bottom wall of the fourth lifting pipe 140 in the axial direction, so that the fourth lifting pipe 140 moves below the third lifting pipe 130; outside the lower transmission While the screw 710 rotates, the lower transmission inner nut 620 fixed at the bottom of the lower transmission outer screw 710 rotates and descends together with the lower transmission outer screw 710, so that the lower transmission inner screw 610 pushes the fifth lifting tube 150 in the axial direction. The fifth lifting tube 150 moves below the fourth lifting tube 140.

When the fifth lifting tube 150 is arranged on the platform, the effect that the first lifting tube 110, the second lifting tube 120, the third lifting tube 130 and the fourth lifting tube 140 move upward at the same time is visually formed.

By setting the five-section lifting column, 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 push the first lifting tube 110 and the second lifting tube respectively 120 upwards away from the third lifting pipe 130, the lower transmission inner screw assembly and the lower transmission outer screw assembly of the lower transmission assembly push the fourth lifting pipe 140 and the fifth lifting pipe 150 downward and away from the third lifting pipe 130, respectively. The lifting pipe 110 and the second lifting pipe 120 rise relative to the third lifting pipe 130, and the fourth lifting pipe 140 and the fifth lifting pipe 150 descend relative to the third lifting pipe 130. The five lifting columns are placed on the table. The lifting pipes achieve visual simultaneous lifting, so that the lifting speed of the lifting column is multiple 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 increased. The different lifting pipes of the different lifting columns move up or down when the lifting column is started. When the lifting column is in the contracted state, the five lifting pipes overlap or partially overlap. Each lifting pipe does not need to be set too long to realize the lifting column up and down. The fixed height can realize the purpose of low installation distance and high stroke, which is convenient for storage and transportation of the lifting column.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications made without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims

A five-section lifting column, which is characterized in that it comprises a lifting assembly and five sleeved lifting tubes. The five lifting tubes are the first lifting tube, the second lifting tube, and the third lifting tube from the inside to the outside. , The fourth lifting tube and the fifth lifting tube, the lifting assembly is fixed in the third lifting tube, and the lifting assembly includes:

The upload moving assembly includes a connected upper transmission inner screw assembly and an upper transmission outer screw assembly. The upper transmission inner screw assembly is connected to the second lifting tube and is used to drive the second lifting tube up. The screw assembly is connected with the first lifting tube and is used for driving the first lifting tube to rise;

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 pipe and is used to drive the fourth lifting pipe down. The lower transmission inner The screw assembly is connected with the fifth lifting tube and is used to drive the fifth lifting tube down;

The driving components are respectively connected with the upper transmission component and the lower transmission component, and are used to simultaneously drive the upper transmission component and the lower transmission component to operate.
The five-section lifting column according to claim 1, wherein the upper transmission inner screw assembly includes an upper transmission inner screw connected to the drive assembly and an upper transmission inner screw threadedly connected to the upper transmission inner screw. A nut, the upper transmission inner nut is connected with the second lifting pipe.
The five-section lifting column according to claim 2, wherein the upper transmission outer screw assembly includes an upper transmission outer screw and an upper transmission outer nut threadedly connected with the upper transmission outer screw, and the upload The movable outer screw rod is sleeved on the upper transmission inner screw rod and rotates with the upper transmission inner screw rod through a spline, and the upper transmission outer nut is connected with the first lifting pipe.
The five-section lifting column according to claim 3, wherein the first lifting pipe includes a first pipe body and a top plate provided on the first pipe body, and the upper transmission outer nut passes through the upper transmission pipe Connect with the top plate.
The five-section lifting column according to claim 1, characterized in that: the lower transmission outer screw assembly includes a lower transmission tube connected to the driving assembly, and the lower transmission tube rotates together through a spline to push the fourth lifting The lower transmission outer screw rod that the tube descends and the lower transmission outer nut threadedly connected with the lower transmission outer screw rod, and the lower transmission outer nut is fixed on the third lifting pipe.
A five-section lifting column according to claim 5, characterized in that: the lower transmission inner screw assembly includes a lower transmission inner screw connected to the fifth lifting tube and a threaded connection with the lower transmission inner screw The lower transmission inner nut is sleeved on the outer side of the lower transmission inner screw rod, and the lower transmission inner nut is fixed at the bottom of the lower transmission outer screw rod and is linked with the lower transmission outer screw rod.
The five-section lifting column according to claim 1, wherein the driving assembly includes a motor and a reduction box connected to the upper transmission assembly and the lower transmission assembly at the same time.
The five-section lifting column according to claim 7, wherein the reduction box includes a worm gear connected with the motor, a first transmission connected with the upper transmission assembly, and a second transmission connected with the lower transmission assembly. The transmission device, the second transmission device and the worm gear are transmitted through the first transmission device.
The five-section lifting column according to claim 8, wherein the worm gear includes a worm connected to the motor and a worm wheel connected to the worm, and the first transmission device includes a first transmission device connected to the worm wheel. A bevel gear, a second bevel gear meshed with the first bevel gear, and a first transmission gear linked with the second bevel gear. The second transmission device includes a second transmission gear meshed with the first transmission gear.
The five-section lifting column according to claim 7, wherein 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.