CN218842940U

CN218842940U - Lifting column

Info

Publication number: CN218842940U
Application number: CN202120080157.5U
Authority: CN
Inventors: 余德君; 魏天驹
Original assignee: Zhongshan Hongmen Intelligent Technology Co ltd
Current assignee: Zhongshan Hongmen Intelligent Technology Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2023-04-11
Anticipated expiration: 2031-01-11

Abstract

The present application relates to a lifting column. The lifting column comprises an outer cylinder, a column body arranged in the outer cylinder and a driving system for driving the column body to slide relative to the outer cylinder, wherein the driving system is fixed in the outer cylinder, and a transmission mechanism is arranged between the driving system and the column body; the transmission mechanism comprises a first transmission piece connected with the output shaft of the driving system and a second transmission piece fixed on the column body, the first transmission piece is in transmission connection with the second transmission piece, and the driving system drives the first transmission piece to rotate and then drives the second transmission piece to move so as to enable the column body to move. The scheme that this application provided has simplified the inner structure of lift post, has better operating stability, can improve the operation precision of product.

Description

Lifting column

Technical Field

The application relates to traffic roadblock equipment technical field especially relates to lift post.

Background

The lifting column is a traffic roadblock device, can realize the control that the road traffic flow is more nimble feasible, because it has the flexibility that can rise and descend, its wide application in occasions such as airport, school, bank, parking area.

In the related art, counterweight devices are arranged in some lifting columns and are used for enabling one end of a screw rod fixed in a column body to be supported on a counterweight rope in a balanced manner through transmission of a guide wheel and the counterweight rope, and although the structure has the advantage of reducing the driving power of a driving system, the counterweight devices and related connecting parts in the lifting columns are complex in structure, large in product weight and poor in stability; in the process of product transportation or installation, some parts such as guide pipes, counterweight ropes and guide wheels are easy to loosen due to shaking, so that after the field installation of the product is completed, the product is easy to jam and generate noise during operation, and the operation precision of the whole product can be influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve or partially solve the problems existing in the related art, the application provides the lifting column, which simplifies the internal structure of the lifting column, has better operation stability and can improve the operation precision of products.

The application provides a lifting column, includes:

the device comprises an outer barrel, a column body arranged in the outer barrel and a driving system for driving the column body to slide relative to the outer barrel, wherein the driving system is fixed in the outer barrel, and a transmission mechanism is arranged between the driving system and the column body;

the transmission mechanism comprises a first transmission piece connected with an output shaft of the driving system and a second transmission piece fixed on the column body, the first transmission piece is in transmission connection with the second transmission piece, and the driving system drives the first transmission piece to rotate and drive the second transmission piece to move so as to enable the column body to move.

In one of the embodiments

The first transmission piece is configured as a lead screw, and the second transmission piece is configured as a nut component; or

The first transmission piece is configured as a nut frame tube, and the second transmission piece is configured as a screw rod;

the screw rod is in threaded connection with the nut frame pipe.

In one embodiment, a first seal is further included;

the first sealing element is fixedly sleeved on the periphery of the driving system and used for sealing the driving system.

In one embodiment, the sealing device further comprises a second sealing element, and the second sealing element is fixedly sleeved on the periphery of the first transmission element and used for sealing the first transmission element.

In one embodiment, the first sealing element is a motor protecting cover, and the second sealing element is a sleeve;

the sleeve is provided with a first sealing end and a second sealing end, and the first sealing end and the second sealing end are respectively in sealing fit with two ends of the first transmission piece.

In one embodiment, a guide block is arranged in the sleeve and used for limiting the first transmission piece in the radial direction.

In one embodiment, the device further comprises a limit sensing device, and the limit sensing device is used for sensing the movement position information of the column body.

In one embodiment, the brake device is also included;

the brake device comprises a brake disc and a clutch mechanism used for being engaged with or separated from the brake disc;

the brake disc is fixedly connected to the output shaft or the first transmission piece;

the clutch mechanism has a clutch plate and a driver for driving the clutch plate into and out of engagement with the brake disc.

In one embodiment, the actuator includes an electromagnet disposed opposite the clutch plate for controlling the clutch plate to be disengaged or engaged with the brake disc.

In one embodiment, a guide column is fixedly mounted on one side of the electromagnet facing the clutch plate, and a compression spring abutting against the clutch plate is sleeved on the guide column.

The technical scheme provided by the application can comprise the following beneficial effects:

the lifting column provided by the embodiment comprises an outer cylinder, a column body arranged in the outer cylinder and a driving system for driving the column body to slide relative to the outer cylinder, wherein the driving system is fixed in the outer cylinder, and a transmission mechanism is arranged between the driving system and the column body; the transmission mechanism comprises a first transmission piece connected with an output shaft of the driving system and a second transmission piece fixed on the column body, the first transmission piece is in transmission connection with the second transmission piece, the driving system drives the first transmission piece to rotate and drives the second transmission piece to move so as to enable the column body to move, after the first transmission piece and the second transmission piece are arranged, the weight is lighter, the internal structure of the lifting column is simplified, the better operation stability is achieved, the operation precision of a product can be improved, the driving is fixed on the structure in the outer cylinder, the risk that a cable is easily broken when the driving system is fixed on the column body in the related art can be avoided, the operation stability of the motor is better, and the service life of the lifting column is prolonged.

The lifting column provided by the embodiment further comprises a braking device; the brake device comprises a brake disc and a clutch mechanism used for being jointed with or separated from the brake disc; the brake disc is fixedly connected to an output shaft of the driving system or the first transmission piece; the clutch mechanism has a clutch plate and a driver for driving the clutch plate into and out of engagement with the brake disc. After the lifting column of the embodiment is provided with the braking device, the ball screw can be prevented from rotating reversely under the action of gravity of the column body, so that the problem that the column body automatically falls can be avoided, and the lifting column can be kept stable after being lifted in place.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the application.

Fig. 1 is a schematic view of an internal structure of a lifting column in the related art;

FIG. 2 is a schematic diagram of a lifting column according to an embodiment of the present application;

FIG. 3 is a schematic diagram of the first and second seals within the lifting column according to one embodiment of the present application;

FIG. 4 is an enlarged partial schematic view at A of FIG. 3;

FIG. 5 is a schematic structural view of a brake device of a lifting column in a disengaged state according to an embodiment of the present application;

FIG. 6 is a schematic structural view of a lifting column with a brake device in an engaged state according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an external perspective view of a lifting column according to an embodiment of the present application;

FIG. 8 is a schematic view of an internal perspective structure of a lifting column according to an embodiment of the present application;

fig. 9 is an exploded view of the drive mechanism of the lifting column shown in one embodiment of the present application.

Reference numerals: a column body 10; a top cover 101; a drive system 20; a motor protection cover 21; a brake device 22; a nut runner frame 300; a nut tube 31; a guide block 32; a limit sensing device 33; a sleeve 34; a screw rod 50; a guide wheel 60; a weight line 70; a weight device 80; an outer tub 100; an outer cylinder bottom plate 1001; an outer barrel inner wall 1002; a drive motor 201; an output shaft 202; a brake disk 221; a clutch plate 222; a compression spring 223; an electromagnet 224; a limit projection 2221; a stopper hole 2211; and a connecting disc 23.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Fig. 1 is a schematic view showing an internal structure of a lifting column in the related art, and referring to fig. 1, a counterweight device 80 is disposed in the lifting column, and the counterweight device 80 is used for driving a lead screw 50 fixed in a column body 10 through a guide wheel 60 and a counterweight rope 70, and then connecting the lead screw to a nut frame guide wheel frame 300 and then balancing and supporting the lead screw on the counterweight rope 70. Although such a structure has the advantage of reducing the power of the driving system 20, the counterweight device and the related connecting parts in the lifting column have complex structures, heavy product weight and poor stability; some spare parts such as guide pulley 60 easily produces the not hard up phenomenon because of rocking, and then leads to the on-the-spot installation of product to accomplish, and the operation easily produces card pause, noise, influences the operating accuracy of whole product. To above-mentioned problem, this application embodiment provides a lift post, and weight is lighter, structural stability is better, and then can improve the running accuracy of product.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 2 to 9, the lifting column provided in this embodiment includes an outer cylinder 100, a column shaft 10 installed in the outer cylinder 100, and a driving system 20 for driving the column shaft 10 to slide relative to the outer cylinder 100, wherein the driving system 20 is fixed in the outer cylinder 100, and a transmission mechanism is disposed between the driving system 20 and the column shaft 10; drive mechanism includes the first driving medium of being connected with actuating system 20's output shaft and is fixed in the second driving medium of shaft 10, first driving medium and second driving medium transmission link to each other, actuating system 20 drives the second driving medium and removes when first driving medium rotates, so that shaft 10 moves, after setting up like this, the inner structure of lift post has been simplified, set up the counter weight device in the lift post has been avoided, the weight is lighter, better assembly stability has, difficult production is not hard up or rocks, can improve the running accuracy of product, be fixed in urceolus 100 with the drive, the risk that the cable was torn easily when actuating system was fixed in the shaft among the correlation technique, make the operating stability of motor better, the life of lift post has been improved.

The driving system 20 includes a driving motor, the driving motor may be a motor capable of rotating forward and backward, when the driving motor rotates forward or backward, the driving motor may drive the column 10 to ascend or descend, the driving motor may be a dc brush motor or a brushless motor, it can be understood that the driving motor of this embodiment may also be a motor of other types, and the present application is not limited.

In this embodiment, the first transmission member is configured as a lead screw 50, the second transmission member is configured as a nut assembly, and the lead screw 50 is in threaded connection with the nut assembly. The top of shaft 10 has top cap 101, and the second driving medium can be connected to top cap 101, and the nut subassembly includes nut pipe 31 and nut, and the nut cover is located the lead screw, and the nut subassembly realizes the transmission through the threaded engagement connection of nut and lead screw 50.

It should be noted that the first transmission member may also be configured as a nut assembly, the second transmission member may also be configured as a lead screw 50, the lead screw 50 is connected with the nut assembly by screw threads, that is, the positions of the nut assembly and the lead screw 50 may be interchanged, and the output shaft 202 of the driving system 20 may be connected with the lead screw 50 or the nut tube 31.

Fig. 2 is a schematic structural diagram of a lifting column according to an embodiment of the present application.

Referring to fig. 2, the driving system 20 is fixedly mounted on the bottom plate 1001 of the outer cylinder 100, the first transmission member is configured as a lead screw 50 coaxially and fixedly connected with the output shaft 202 of the driving system 20, the second transmission member is configured as a nut assembly fixed on the column shaft 10, the lead screw 50 is in threaded connection with the nut assembly, the upper end of a nut tube 31 of the nut assembly is fixedly connected with the top cover 101 of the column shaft 10, the lower end of the nut tube 31 is provided with a nut 3101 in threaded fit with the lead screw 50, and the lower end of the lead screw 50 is coaxially and fixedly connected with the output shaft 202 of the driving system 20. When the column is operated, the driving system 20 drives the screw rod 50 to rotate, the screw rod 50 drives the nut pipe 31 to move along the axial direction, and the outer cylinder 100 is fixedly installed relative to the ground, so that the screw rod 50 is limited to move only in a rotating manner and not in a lifting manner, the nut pipe 31 only lifts and does not rotate, the driving system 20 is switched to rotate in the forward direction or in the reverse direction to control the rotating direction of the screw rod 50, and the column body 10 is driven to ascend or descend along with the nut pipe 31.

When the lifting column operates, the driving system 20 drives the screw rod 50 to rotate, and as the outer cylinder 100 is fixed relative to the ground, the column shaft 10 can move along the nut tube 31 relative to the outer cylinder 100 along the axial direction, and in the process, the rotation direction of the screw rod 50 is changed to drive the column shaft 10 to ascend or descend relative to the outer cylinder 100.

The screw 50 in this embodiment may be a ball screw 50, and the ball screw 50 has smaller rotational friction resistance and better transmission efficiency than other types of screws 50, and it is understood that the screw 50 may also be other types, such as a trapezoidal screw 50.

It is understood that the present embodiment is not limited to the fixing position of the nut tube 31 in the shaft 10, and in some embodiments, the nut tube 31 may also be fixed to the inner wall, bottom or other positions or components of the shaft 10.

In the embodiment, the driving system 20 is fixedly installed on the outer cylinder 100, the driving system 20 does not move along with the column 10, the cable connected to the driving system 20 is not dragged up and down along with the operation of the column 10, and in the operation process of the lifting column, the driving system 20 has better stability, and meanwhile, the whole weight of the column 10 can be reduced, the load of the driving system 20 is reduced, the failure rate is reduced, and the service life is prolonged.

It can be understood that, in this embodiment, the first transmission element fixedly connected to the driving system 20 may also be a nut assembly, the second transmission element connected to the column 10 may also be a screw rod 50, the output shaft 202 of the driving system 20 may be coaxially and fixedly connected to the nut tube 31 of the nut assembly, and the screw rod 50 is driven to move axially by driving the nut tube 31, so as to drive the column 10 to operate.

Because the lifting column is buried underground for a long time, factors such as acid-base corrosion, sand and stone clamping exist, the lifting column is easy to block during operation, and rainwater and dust easily enter to influence the movement performance of the lifting column when the lifting column is installed outdoors. To this problem, the lift post of this embodiment still is provided with seal structure, and seal structure can effectively reduce because of the trouble risk that acid-base corrosion, grit card go into, rainwater dust get into etc. cause, and the performance of lift post is more stable, can be applicable to outdoor scene better.

FIG. 3 is a schematic diagram of the first and second seals within the lifting column according to one embodiment of the present application; FIG. 8 is a schematic view of an internal perspective of a lifting column according to an embodiment of the present application; FIG. 9 is an exploded view of the drive mechanism of the lifting column shown in one embodiment of the present application; fig. 3, 8 and 9 show the assembly structure of the driving system 20, the first sealing element, the second sealing element and the transmission device.

Referring to fig. 3 and 9, the lifting column further comprises a first seal and a second seal; the first sealing element is fixedly sleeved on the periphery of the driving system 20 and used for sealing the driving system 20, the second sealing element is fixedly sleeved on the periphery of the first transmission element and used for sealing the first transmission element, and when the first transmission element is a screw rod 50, the screw rod 50 can be sealed; when the first transmission member is a nut assembly, the nut assembly may be sealed. In one implementation, the first seal may be the motor boot 21 and the second seal may be the sleeve 34; the sleeve 34 has a first sealed end and a second sealed end, the first sealed end of the sleeve 34 is connected to the motor protection cover 21 in a sealed manner, the upper end of the lead screw 50 penetrates through the nut assembly, and the nut assembly is matched with the second sealed end of the sleeve 34 in a sealed manner. The motor protection cover 21 and the sleeve 34 are fixedly arranged in the outer barrel 100, the lower end 3401 of the sleeve can be connected with the motor protection cover 21 into a whole through the connecting disc 23 and is integrally arranged on the periphery of the driving system 20 and the lead screw 50, and the structure is stable and reliable and has better sealing property. The first sealing member and the second sealing member of this embodiment can make actuating system 20 and lead screw 50 move the form in confined space, can not only reduce the running noise, effectively isolated external dust, steam, grit etc. moreover, guaranteed motor motion's stability and lead screw 50 and nut meshing precision, move more smoothly.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3, and fig. 4 shows an assembly structure of the guide block 32 and the limit sensor in the lifting column.

Referring to fig. 4, in this embodiment, a guide block 32 is further fixedly installed on the periphery of the upper end of the screw rod 50, and the guide block 32 has a function of radially limiting the screw rod 50. The guide block can set up at the sleeve top, can install the sealing member in the guide block, through sealing member and nut pipe sealing fit, plays sealed telescopic effect. Because the bottom fixed connection of lead screw 50 is in the output shaft 202 of actuating system 20, when lead screw 50 was driven high-speed rotatory by actuating system 20, the upper end produced easily and radially rocked and influence its operation stably, through setting up guide block 32, can effectively eliminate rocking when lead screw 50 is rotatory for the screw thread transmission of lead screw 50 and nut pipe 31 is more stable, has guaranteed nut pipe 31 along its axial motion's precision, improves the operating stability of lift post.

With reference to fig. 4, the lifting column of this embodiment is further provided with a limit sensing device 33, where the limit sensing device 33 is configured to sense the position information of the column shaft 10 running along the axial direction, and send the sensed position information to the driving system 20, so as to control the running speed of the column shaft 10. When the column body is close to the limit position, the limit sensing device 33 can send a control signal to the controller of the driving system 20, the controller controls the driving motor of the driving system 20 to decelerate, the limit part arranged on the lifting column can be prevented from being damaged due to inertia impact, and the service life and the stability of the product are improved.

It is understood that the present embodiment does not limit the type of the position limit sensing device 33, and the position limit sensing device 33 may be a contact type, a non-contact type, or the like.

It should be understood that the type and the installation position of the position-limiting sensing device 33 are not limited in this embodiment, and the position-limiting sensing device 33 may be installed at the bottom of the nut tube 31, at the upper end or the lower end of the sleeve 34, or at a position on the inner wall 1002 of the outer tub near the column 10.

FIG. 5 is a schematic structural view of a brake device of a lifting column in a disengaged state according to an embodiment of the present application; fig. 6 is a schematic structural view illustrating a brake device of a lifting column in an engaged state according to an embodiment of the present application.

Referring to fig. 5 and 6, the lifting column is further provided with a braking device 22, and the braking device 22 can limit the reverse rotation of the screw rod, so that the lifting column keeps stable after being lifted. Since the screw 50 of the present embodiment is preferably a ball screw, the braking device 22 can avoid the problem that the ball screw rotates reversely under the gravity of the column 10, which leads to the column 10 being prone to automatically fall down after it is lifted to a proper position.

The driving system 20 includes a driving motor 201, the driving motor 201 has an output shaft 202, and a braking device 22 can be installed at the bottom of the driving system 20 and is used for cooperating with the output shaft 202 of the driving system 20 to brake the output shaft 202, so as to prevent the screw rod 50 from reversely rotating by locking the output shaft 202.

In some embodiments, the braking device 22 includes a brake disc 221 secured to the output shaft 202; and a clutch mechanism for engaging with or disengaging from the brake disc 221, the clutch mechanism having a clutch plate 222 and a driver for driving the clutch plate 222 into or out of engagement with the brake disc 221. The driver is used to control the clutch plate 222 to be separated from or engaged with the brake disc 221. The driver may include an electromagnet 224, a guiding column is fixedly installed on one side of the electromagnet 224 facing the clutch plate 222, and a compression spring 223 abutting against the clutch plate 222 is sleeved on the guiding column.

The brake device of the present embodiment may also be referred to as a brake, the brake disc 221 may also be referred to as a brake pad, and when the clutch plate 222 and the brake disc 221 are in the engaged state, they may be referred to as a braking state; when the clutch plate 222 and the brake disc 221 are in a disengaged state, it may be referred to as an unlocked state.

In some embodiments, a limit protrusion 2221 is fixedly disposed on one side of the clutch plate 222 opposite to the brake disc 221, a limit hole 2211 for engaging with the limit protrusion 2221 is disposed on the brake disc 221, and when the clutch plate 222 is engaged with the brake disc 221, the limit protrusion 2221 is engaged with the limit hole 2211 to lock the brake disc 221; when the clutch plate 222 and the brake disk 221 are separated, the limit projection 2221 is disengaged from the limit hole 2211, and the brake disk 221 is unlocked.

When the column 10 ascends, the electromagnet 224 is energized, the electromagnet 224 generates magnetic force to attract the clutch plate 222, so that the clutch plate 222 is separated from the brake disc 221, and the spring 223 is compressed.

When the column body 10 ascends to the right position, the electromagnet 224 is powered off, the magnetic force of the electromagnet 224 disappears, the attraction on the clutch plate 222 is released, the clutch plate 222 is engaged with the brake disc 221 under the tension action of the compression spring 223, the brake disc 221 is locked, the screw rod 50 is prevented from reversely rotating, and the column body 10 keeps stable in position after ascending.

In another embodiment, the braking device 22 can be disposed at other positions, such as adjacent to the screw rod 50, and is used to cooperate with the screw rod 50 to achieve braking. The brake disc 221 can be fixedly arranged on the screw rod 50, when the column body 10 ascends, the electromagnet 224 is electrified, and the clutch plate 222 and the brake disc 221 are in a separated state; when the upper body of the column shaft 10 is in place, the electromagnet 224 is de-energized, and the spring drives the clutch plate 222 to engage with the brake disc 221 by its tension, preventing the screw rod 50 from rotating in the reverse direction.

In other embodiments, the braking device 22 may not be provided to prevent the column 10 from falling, and the screw rod 50 having the self-locking function is used to prevent the reverse rotation, and the screw rod 50 having the self-locking function may be, for example, a trapezoidal screw rod, and since the frictional force is large during the operation of the trapezoidal screw rod, the trapezoidal screw rod will not be rotated reversely by the gravity of the column 10, and thus the structure can be further simplified and the cost can be reduced.

By combining the above embodiments, it can be found that the lifting column provided by the embodiment of the application avoids the adoption of a counterweight device in the related art, and avoids the hidden trouble that the lifting column is stuck in operation due to the fact that the counterweight device shakes and impacts other accessories in the transportation process; the driving system 20 is fixed to the outer barrel, so that the weight of the column body 10 can be reduced, the load of the driving system 20 is further reduced, the stable operation of the column body 10 is realized by increasing the power of the driving system 20 and adopting a ball screw with high conduction efficiency, and the weight and the cost of the lifting column are greatly reduced due to the structural design; the ball screw is adopted to ensure that the transmission mechanism operates more stably, the transmission efficiency is higher, the noise is lower, the product quality is improved, and the service life of the lifting column is prolonged.

Other embodiments of the present application further include a lifting column that can be implemented by combining the technical features of the above embodiments.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A lifting column, comprising:

the transmission mechanism comprises a first transmission piece connected with an output shaft of the driving system and a second transmission piece fixed in the column body, the first transmission piece is in transmission connection with the second transmission piece, and the driving system drives the first transmission piece to rotate and then drives the second transmission piece to move so as to enable the column body to move.

2. The lifting column of claim 1, wherein:

The first transmission piece is configured as a nut assembly, and the second transmission piece is configured as a lead screw;

the screw rod is in threaded connection with the nut component.

3. The lifting column as claimed in claim 2, wherein:

further comprising a first seal;

4. The lifting column of claim 3, wherein:

a second seal is also included;

the second sealing element is fixedly sleeved on the periphery of the first transmission element and used for sealing the first transmission element.

5. The lifting column of claim 4, wherein:

the first sealing element is a motor protective cover, and the second sealing element is a sleeve;

6. The lifting column of claim 5, wherein:

the sleeve is internally provided with a guide block, and the guide block is used for limiting the first transmission piece along the radial direction.

7. The lifting column as claimed in claim 1, wherein:

the limiting induction device is used for inducing the motion position information of the column body.

8. The lifting column as claimed in any one of claims 1 to 7, wherein:

the device also comprises a braking device;

9. The lifting column of claim 8, wherein:

the driver comprises electromagnets which are arranged opposite to the clutch plate, and the electromagnets are used for controlling the clutch plate to be separated from or jointed with the brake disc.

10. The lifting column of claim 9, wherein:

the electromagnet is fixedly provided with a guide post towards one side of the clutch plate, and the guide post is sleeved with a compression spring which is abutted against the clutch plate.