Lifting column

Abstract

The utility model discloses a lifting column, and solves the technical problems that an electric lifting column in the prior art cannot be normally used in a power failure state, and great limitation exists in use. The lifting column comprises a cylinder assembly, a column body and a driving assembly. A cavity is formed in the barrel assembly, and a lifting opening communicating with the cavity is formed in the top of the barrel assembly. The driving assembly comprises a lifter, an electric driving part and a manual driving part; the lifter, the electric driving part and the manual driving part are all arranged in the cavity, the output end of the electric driving part and the output end of the manual driving part are both in transmission connection with the power input end of the lifter, and the operation end of the manual driving part extends out of the barrel assembly; the column body is arranged at the lifting end of the lifter. The lifting machine in the lifting column can be driven by the electric driving part or the manual driving part to act so as to drive the column body to achieve the lifting function, and therefore the lifting column can be normally used under the power failure condition.

Description

Technical Field

[0001] The present application belongs to the technical field of lifting column equipment, and specifically relates to a lifting column. Background Art

[0002] Lifting bollards are devices that protect buildings, equipment, and personnel by restricting passing vehicles. They can effectively ensure traffic order and the safety of major facilities and places. They are mainly used in public places such as government agencies, airports, schools, and squares.

[0003] At present, there are many types of lifting columns, and most of them use electricity, electro-hydraulic push rods or cylinders as power sources. Among them, lifting columns using electro-hydraulic push rods or cylinders as power sources are prone to failure due to medium leakage. Electric lifting columns using electricity as power source are integrated into a two-way mechanical transmission movement by a motor and a spiral lift. They can automatically control the raising and lowering of the lifting column, have the characteristics of stable lifting speed and high anti-collision performance, can effectively reduce the failure rate, and avoid unstable operation.

[0004] However, existing electric bollards can only be operated electronically. They cannot function properly during power outages, making it impossible to open aisles and allow vehicles to pass through, or to control aisles or vehicles. This presents significant limitations. Therefore, inventing a bollard that can be operated both electronically and manually is a pressing technical challenge for those skilled in the art. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a lifting column to solve the problem of high failure rate of electro-hydraulic push rods and pneumatic push rods due to medium leakage, and the technical problem that the electric lifting column in the existing technology cannot be used normally in the power outage state and has great limitations.

[0006] The technical solutions adopted to achieve the purpose of this application are:

[0007] A lifting column comprises a cylinder assembly, a column and a driving assembly;

[0008] A cavity is provided inside the cylinder assembly, and a lifting port communicating with the cavity is provided on the top of the cylinder assembly;

[0009] The drive assembly includes an elevator, an electric drive unit and a manual drive unit; the elevator, the electric drive unit and the manual drive unit are all arranged in the cavity, the output end of the electric drive unit and the output end of the manual drive unit are both transmission-connected to the power input end of the elevator, and the operating end of the manual drive unit extends to the outside of the cylinder assembly; the column is arranged at the lifting end of the elevator, and the elevator movement is controlled by operating the electric drive unit or the manual drive unit to drive the column to extend or retract from the lifting port.

[0010] In order to better implement the present application, further optimization is made in the above structure, wherein the driving assembly further includes a right-angle converter;

[0011] The right-angle converter is arranged inside the cylinder assembly and is located on the side of the elevator. The output end of the right-angle converter is transmission-connected to the input end of the elevator.

[0012] The electric drive unit and the manual drive unit are both located above the right-angle converter, and the driving end of the electric drive unit and the driving end of the manual drive unit are both transmission-connected to the input end of the right-angle converter.

[0013] In order to better realize the present application, further optimization is made in the above structure. The electric drive part is a variable frequency motor, the manual drive part is a transmission rod, the manual drive part is located above the electric drive part, and the drive end of the manual drive part is connected to the rotating shaft of the electric drive part. The input end of the manual drive part extends to the top of the cylinder assembly, and an operating hole is provided at the top of the cylinder assembly corresponding to the position of the input end of the manual drive part.

[0014] In order to better realize the present application, further optimization is made in the above structure, and the lifting column further includes a support frame;

[0015] The support frame is arranged in the cavity, and the support frame is connected and fixed to the cylinder assembly;

[0016] The driving assembly is arranged on the supporting frame.

[0017] In order to better realize the present application, further optimization is made in the above structure, wherein the support frame includes a mounting base and a fixed base;

[0018] The mounting base is connected to the cylinder assembly via a plurality of guide rods, the axes of the guide rods being parallel to the movement direction of the lifting end of the elevator, and the column being slidably arranged on the guide rods along the length direction of the guide rods;

[0019] The fixed base is arranged on a side of the mounting base away from the column, the elevator is arranged on the fixed base, and the lifting end of the elevator passes through the mounting base and is connected to the column.

[0020] In order to better realize the present application, further optimization is made in the above structure. The outer wall of the column is provided with a stabilizing flange, and the stabilizing flange is provided with a guide hole corresponding to the position of the guide rod. The column is slidably arranged on the guide rod through the guide hole and the guide rod.

[0021] In order to better realize the present application, further optimization is made in the above structure, and a limiting bolt for limiting the descending height of the column is provided on the mounting base.

[0022] In order to better realize the present application, further optimization is made in the above structure. A connecting frame is provided in the column. The action end of the elevator is connected to the connecting frame through bolts. When the column and the lifting end of the elevator are lowered to the lowest point, a buffer gap exists between the lifting end of the elevator and the connecting frame.

[0023] In order to better realize the present application, further optimization is made in the above structure, wherein the cylinder assembly includes an outer cylinder, a cover plate and a sleeve;

[0024] The outer cylinder is a tubular structure with openings at both ends. The outer wall of the outer cylinder is provided with anti-slip protrusions. The cover plate is provided at the opening at the top end of the outer cylinder. The lifting port is provided on the cover plate, and the shape of the lifting port matches the cross-sectional shape of the column.

[0025] The sleeve is arranged on a side of the cover plate facing the outer cylinder, and the column is slidably arranged in the sleeve.

[0026] In order to better realize the present application, the above structure is further optimized, and the inner side wall of the sleeve is provided with a bushing, and the inner side wall of the bushing is provided with a brush.

[0027] It can be seen from the above technical solution that the elevator in the lifting column provided by the present application can be driven by the electric drive unit or the manual drive unit to drive the column to realize the lifting function. The entire action process is smooth and the failure rate is low. In the event of a power outage, the manual drive unit can be manually operated to realize the lifting and lowering of the column, thereby realizing the opening of the channel and the release of vehicles, or the control of the channel or vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of a lifting column in the released state for this application;

[0029] Figure 2 This is a structural diagram of a lifting column in a controlled state for this application;

[0030] Figure 3 This is a diagram showing the connection between the drive assembly and the column in a lifting column of the present application;

[0031] Figure 4 This is a cross-sectional view of a cylinder assembly in a lifting column of the present application;

[0032] Figure 5 This is a cross-sectional view of a column in a lifting column of the present application;

[0033] Figure 6 A cross-sectional view of a lifting column in a released state for this application;

[0034] Figure 7 for Figure 6 A partial enlarged view of part A in the middle;

[0035] Figure 8 This is a cross-sectional view of a lifting column in a controlled state according to the present application.

[0036] Description of reference numerals:

[0037] 1- cylinder assembly, 11- outer cylinder, 12- cover plate, 13- sleeve, 14- bushing;

[0038] 2-column, 21-stabilizing flange, 22-connecting frame;

[0039] 3- drive assembly, 31- lifter, 32- electric drive unit, 33- manual drive unit, 34- right angle converter;

[0040] 4-support frame, 41-mounting base, 42-fixed base, 43-guide rod, 44-limiting bolt. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to which this application belongs to understand this application more clearly, the technical solution of this application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0042] In the embodiments of this application, Figures 1 to 8 As shown, the lifting column includes a cylinder assembly 1, a column 2 and a drive assembly 3, see Figure 6 and Figure 8 ;in,

[0043] The interior of the cylinder assembly 1 is provided with a cavity, and the top of the cylinder assembly 1 is provided with a lifting port connected to the cavity. During installation, the staff can install the cylinder assembly 1 in the installation hole reserved on the road surface, and the upper end surface of the cylinder assembly 1 is flush with the road surface to ensure the flatness of the road surface, so that the cylinder assembly 1 will not hinder the passage of pedestrians and vehicles;

[0044] The driving assembly 3 includes a lift 31, an electric driving unit 32 and a manual driving unit 33, see Figure 3 ;

[0045] The elevator 31, the electric drive unit 32 and the manual drive unit 33 are all arranged in the cavity. The output end of the electric drive unit 32 and the output end of the manual drive unit 33 are both transmission-connected to the power input end of the elevator 31, and the operating end of the manual drive unit 33 extends to the outside of the barrel assembly 1.

[0046] The column 2 is arranged at the lifting end of the elevator 31. The elevator 31 is controlled by operating the electric drive unit 32 or the manual drive unit 33 to drive the column 2 to extend outward from the lifting port or retract into the cavity.

[0047] Under normal circumstances (when there is electricity), the staff can control the electric drive unit 32 to rotate through the control system, or manually operate the manual drive unit 33 to drive the elevator 31 to move, so that the moving end of the elevator 31 can drive the column 2 to extend outward from the lifting port, or retract into the cavity, so as to achieve channel control or release;

[0048] In a power outage state, when it is necessary to control or release the channel, the staff can manually operate the manual drive unit 33 to drive the elevator 31 to move, so that the action end of the elevator 31 can drive the column 2 to extend outward from the lifting port, or retract into the cavity, to achieve channel control or release.

[0049] It should be noted that the above-mentioned control system is a remote control, and the control system is electrically connected to the electric drive unit 32 so that the staff can control the start and stop and rotation direction of the electric drive unit 32 through the control system; wherein, the electrical connection can be a wired connection or a wireless connection. This technical means is relatively common in the existing technology and will not be described in detail here.

[0050] It is worth noting that when the column 2 and the lifting end of the elevator 31 are lowered to the lowest point, the upper end surface of the column 2 is flush with the upper end surface of the cylinder assembly 1, see Figure 1 and Figure 6 , to ensure that the road surface is flat so as not to affect the passage of vehicles and pedestrians.

[0051] In some embodiments, the lifting column further includes a support frame 4; wherein,

[0052] The support frame 4 is arranged inside the barrel assembly 1, that is, in the above-mentioned cavity, and the support frame 4 is connected and fixed to the barrel assembly 1;

[0053] The driving assembly 3 is arranged on the support frame 4, so that the structure of the lifting column is more compact and more convenient to install.

[0054] Preferably, the support frame 4 includes a mounting base 41 and a fixing base 42, see Figure 3 and Figure 6 ;in,

[0055] The mounting base 41 is connected to the cylinder assembly 1 through a plurality of guide rods 43. Specifically, one end of the guide rod 43 is fixedly connected to the top wall of the cavity. The plurality of guide rods 43 are arranged at intervals around the circumference of the lifting port, and the axis of the guide rod 43 is parallel to the movement direction of the lifting end of the elevator 31. The mounting base 41 is arranged at the other end of the guide rod 43 so that the mounting base 41 can be stably suspended in the cylinder assembly 1. The above-mentioned column 2 is slidably arranged on the guide rod 43 along the length direction of the guide rod 43, so that the sliding direction of the column 2 is limited by the guide rod 43, and the lifting and lowering of the column 2 is more stable and smooth.

[0056] The fixed base 42 is suspended on the side of the mounting base 41 away from the column 2 by bolts. The elevator 31 is set on the fixed base 42, and the lifting end of the elevator 31 passes through the mounting base 41 and is connected to the column 2 to drive the column 2 to move.

[0057] In some embodiments, the column 2 is a cylindrical structure with one end closed, that is, a cavity is provided inside the column 2. Figure 3 and Figure 5 The bottom surface of the column 2 is provided with an opening connected to the cavity, the top surface of the column 2 is a closed surface, the outer wall of the column 2 is provided with a stabilizing flange 21, and the stabilizing flange 21 is arranged close to the opening, and the stabilizing flange 21 is provided with a guide hole corresponding to the position of the guide rod 43. The column 2 is slidably arranged on the guide rod 43 through the cooperation of the guide hole and the guide rod 43, so that the column 2 is more stable when lifting.

[0058] It should be noted that the above-mentioned stabilizing flange 21 is an annular structure, and the shape of the inner wall of the stabilizing flange 21 matches the cross-sectional shape of the column 2, so that the inner wall of the stabilizing flange 21 fits with the outer wall of the column 2. The column 2 and the stabilizing flange 21 are coaxially arranged, and the column 2 and the stabilizing flange 21 are connected and fixed by welding, so that the connection between the column 2 and the stabilizing flange 21 is more stable.

[0059] Preferably, a sliding sleeve is provided in the guide hole, and the shape of the inner wall of the sliding sleeve matches the cross-sectional shape of the guide rod 43, and the inner wall of the sliding sleeve and the outer wall of the guide rod 43 are both smooth arc surfaces, so as to reduce the friction between the stabilizing flange 21 and the guide rod 43, and reduce the gap between the guide hole and the guide rod 43, so that the column 2 is more stable and smooth when lifting.

[0060] In some embodiments, the mounting base 41 is provided with a limiting bolt 44 for limiting the descending height of the column 2. Figure 3 The limit bolt 44 can prevent the column 2 from descending too much, causing the top surface of the column 2 to be lower than the road surface, thereby causing potholes on the road surface, affecting the passage of vehicles or pedestrians, or posing a major safety hazard.

[0061] In some embodiments, the column 2 is provided with a connecting frame 22. In this embodiment, the connecting frame 22 is located on the top surface of the cavity of the column 2. Figure 5 , and the axis of the connecting frame 22 is parallel to the axis of the column 2; preferably, the connecting frame 22 and the column 2 are coaxially arranged;

[0062] The operating end of the lifter 31 is connected to the connecting frame 22 via a bolt, and the ends of the bolt are not tightened between the operating end of the lifter 31 and the connecting frame 22, so that there is space for movement between the lifting end of the lifter 31 and the connecting frame 22. In other words, the connecting frame 22 can freely move away from the lifting end of the lifter 31 by the length reserved by the bolt until the connecting frame 22 and the lifting end of the lifter 31 are respectively close to the ends of the bolt.

[0063] During the process of the column 2 being driven down by the lifting end of the elevator 31, when the lower end surface of the column 2 contacts the limit bolt 44, the upper end surface of the column 2 is flush with the upper end surface of the cylinder assembly 1 and the road surface, and the column 2 is constrained by the limit bolt 44 and will not continue to descend. At this time, the lifting end of the elevator 31 has not yet descended to the lowest point, and the lifting end of the elevator 31 will continue to descend until it reaches the lowest point and stops. Figure 6 and Figure 7 In this state, a buffer gap exists between the lifting end of the lift 31 and the connecting frame 22. This buffer gap prevents the pressure of the vehicle on the column 2 from acting on the lift 31. That is, when a vehicle passes the position of the lifting column and is run over by the upper end surface of the column 2, the pressure of the vehicle on the column 2 will not act on the lift 31, thereby preventing the lift 31 from being damaged due to excessive pressure, thereby ensuring the service life of the lift 31 and improving the service life of the lifting column.

[0064] When the lifting end of the elevator 31 rises upward, the lifting end of the elevator 31 first rises alone a distance (the width of the buffer gap) until the lifting end of the elevator 31 contacts the lower end surface of the connecting frame 22. The lifting end of the elevator 31 will lift the column 2 upward so that the column 2 can extend outward from the lifting port under the action of the elevator 31, thereby playing the role of controlling the passage or vehicle.

[0065] It is worth noting that the above-mentioned column 2 extending outward from the lifting port does not mean that the column 2 is completely extended from the lifting port, but means that the top end of the column 2 rises to a point where it can restrict the movement of the vehicle. In this state, the column 2 is still partially located in the cylinder assembly 1, see Figure 8 .

[0066] Preferably, the maximum descending length of the lifting end of the lift 31 is equal to the maximum descending length of the column 2 plus the width of the buffer gap.

[0067] In some embodiments, the driving assembly 3 further includes a right-angle converter 34, see Figure 3 and Figure 6 ;

[0068] The right-angle converter 34 can adjust the direction of power transmission so that the power output direction and the power input direction are distributed at 90° (right angles). In this embodiment, the right-angle converter 34 is arranged inside the cylinder assembly 1 and is located on the side of the elevator 31. The output end of the right-angle converter 34 is transmission-connected to the input end of the elevator 31.

[0069] The above-mentioned electric drive unit 32 and manual drive unit 33 are both located above the right-angle converter 34, and the driving end of the electric drive unit 32 and the driving end of the manual drive unit 33 are both transmission-connected to the input end of the right-angle converter 34. This arrangement can effectively reduce the space occupied by the drive assembly 3, so that many components of the drive assembly 3 can all be installed inside the cylinder assembly 1, thereby reducing the area required for the lifting column to be occupied during installation.

[0070] In some embodiments, the electric drive unit 32 is a variable frequency motor, and the manual drive unit 33 is a transmission rod. The manual drive unit 33 is located above the electric drive unit 32, and the driving end of the manual drive unit 33 is connected to the rotating shaft of the electric drive unit 32. The input end of the manual drive unit 33 extends to the top of the barrel assembly 1, and an operating hole is provided on the top of the barrel assembly 1 at a position corresponding to the input end of the manual drive unit 33.

[0071] When it is necessary to manually control the lifting and lowering of the column 2, the staff can use a wrench socket or put the output end of the electric tool on the manual drive part 33 to rotate the manual drive part 33, and the manual drive part 33 drives the rotating shaft of the electric drive part 32 to rotate, and then the rotating shaft of the electric drive part 32 drives the elevator 31 to move, so that the lifting end of the elevator 31 can drive the column 2 to rise and fall.

[0072] It should be noted that, in a power outage, the electric drive unit 32 , i.e., the variable frequency motor, is not locked. By rotating the manual drive unit 33 , the shaft of the electric drive unit 32 can be easily driven to rotate, thereby driving the elevator 31 to rotate.

[0073] Preferably, a sealing plug is provided at the above-mentioned operating hole. Sealing the operating hole with the sealing plug can prevent debris from falling into the operating hole, which would cause the wrench socket or power tool to be unable to extend into the operating hole to connect with the manual drive part 33.

[0074] In some embodiments, the manual drive unit 33 is connected to the rotating shaft of the electric drive unit 32 through a coupling, and the rotating shaft of the electric drive unit 32 is connected to the input end of the elevator 31 through a coupling. The two couplings are respectively located at both ends of the rotating shaft of the electric drive unit 32.

[0075] In some embodiments, the barrel assembly 1 includes an outer barrel 11, a cover plate 12 and a sleeve 13, see Figure 1 and Figure 4 ;

[0076] The outer cylinder 11 is a tubular structure with openings at both ends. The outer wall of the outer cylinder 11 is provided with anti-slip protrusions. The anti-slip protrusions can be a mesh structure, which can increase the surface area of ​​the outer cylinder 11 and the roughness of the outer wall of the outer cylinder 11, thereby increasing the contact area between the outer cylinder 11 and the cement, so as to better fix the outer cylinder 11 in the mounting hole reserved on the road surface, making the installation of the lifting column more stable.

[0077] The cover plate 12 is provided on the opening at the top of the outer cylinder 11, and the lifting port is provided on the cover plate 12, and the shape of the lifting port matches the cross-sectional shape of the column 2; preferably, the cover plate 12 includes a flange and a flange plate; the flange is fixedly provided on the opening of the outer cylinder 11, and the flange plate is provided on the flange, and the lifting port and the operation hole are provided on the flange plate;

[0078] The above-mentioned sleeve 13 is arranged on the side of the cover plate 12 facing the outer cylinder 11. In this embodiment, the sleeve 13 is arranged on the flange plate, and the column 2 is slidably arranged in the sleeve 13 to better limit the movement direction of the column 2, thereby making the lifting and lowering of the column 2 more stable.

[0079] In some embodiments, the inner wall of the sleeve 13 is provided with a bushing 14, see Figure 7 , and a brush is provided on the inner wall of the bushing 14, which can prevent debris from entering the gap between the bushing 14 and the column 2, thereby avoiding the situation where the lifting of the column 2 is hindered.

[0080] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0081] 1) The lifter 31 in the lifting column can be driven by the electric drive unit 32 or the manual drive unit 33 to drive the column 2 to achieve the lifting function. In the event of a power outage, the manual drive unit 33 can be manually operated to achieve the lifting and lowering of the column 2, thereby opening the channel and releasing vehicles, or controlling the channel or vehicles.

[0082] 2) A buffer gap is provided between the lifting end of the elevator 31 and the connecting frame 22 of the lifting column. The buffer gap can prevent the pressure on the column 2 from acting on the elevator 31 when the column 2 and the lifting end of the elevator 31 are at the lowest point, causing the elevator 31 to be damaged due to excessive pressure, thereby ensuring the service life of the elevator 31 and improving the service life of the lifting column.

[0083] 3) A brush is provided on the inner side wall of the bushing 14 of the lifting column. The setting of the brush does not affect the lifting and lowering of the column 2, and the brush can block the gap between the bushing 14 and the column 2 to prevent debris or sludge from entering between the bushing 14 and the column 2 and causing the lifting and lowering of the column 2 to be hindered.

[0084] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0085] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A lifting column, characterized in that: It comprises a barrel assembly (1), a column (2) and a driving assembly (3); A cavity is provided inside the cylinder assembly (1), and a lifting port communicating with the cavity is provided at the top of the cylinder assembly (1); The driving assembly (3) comprises an elevator (31), an electric driving unit (32) and a manual driving unit (33); the elevator (31), the electric driving unit (32) and the manual driving unit (33) are all arranged in the cavity, the output end of the electric driving unit (32) and the output end of the manual driving unit (33) are both transmission-connected to the power input end of the elevator (31), and the operating end of the manual driving unit (33) extends to the outside of the cylinder assembly (1); the column (2) is arranged at the lifting end of the elevator (31), and the elevator (31) is controlled by operating the electric driving unit (32) or the manual driving unit (33) to drive the column (2) to extend or retract from the lifting port.

2. The lifting column according to claim 1, characterized in that The drive assembly (3) further includes a right-angle converter (34); The right-angle converter (34) is arranged inside the barrel assembly (1), and the right-angle converter (34) is located on the side of the elevator (31), and the output end of the right-angle converter (34) is transmission-connected to the input end of the elevator (31); The electric drive unit (32) and the manual drive unit (33) are both located above the right-angle converter (34), and the drive end of the electric drive unit (32) and the drive end of the manual drive unit (33) are both transmission-connected to the input end of the right-angle converter (34).

3. The lifting column according to claim 2, characterized in that The electric drive unit (32) is a variable frequency motor, and the manual drive unit (33) is a transmission rod. The manual drive unit (33) is located above the electric drive unit (32), and the driving end of the manual drive unit (33) is transmission-connected to the rotating shaft of the electric drive unit (32). The input end of the manual drive unit (33) extends to the top of the barrel assembly (1), and an operating hole is provided at the top of the barrel assembly (1) corresponding to the input end of the manual drive unit (33).

4. The lifting column according to claim 1, characterized in that Also includes a support frame (4); The support frame (4) is arranged in the cavity, and the support frame (4) is connected and fixed to the barrel assembly (1); The driving assembly (3) is arranged on the supporting frame (4).

5. The lifting column according to claim 4, characterized in that The support frame (4) comprises a mounting base (41) and a fixing base (42); The mounting base (41) is connected to the cylinder assembly (1) via a plurality of guide rods (43), the axes of the guide rods (43) being parallel to the movement direction of the lifting end of the elevator (31), and the column (2) being slidably arranged on the guide rods (43) along the length direction of the guide rods (43); The fixed base (42) is arranged on a side of the mounting base (41) facing away from the column (2), the elevator (31) is arranged on the fixed base (42), and the lifting end of the elevator (31) passes through the mounting base (41) and is connected to the column (2).

6. The lifting column according to claim 5, characterized in that The outer side wall of the column (2) is provided with a stabilizing flange (21), and the stabilizing flange (21) is provided with a guide hole at a position corresponding to the guide rod (43). The column (2) is slidably arranged on the guide rod (43) through the cooperation between the guide hole and the guide rod (43).

7. The lifting column according to claim 6, characterized in that The mounting base (41) is provided with a limiting bolt (44) for limiting the descending height of the column (2).

8. The lifting column according to claim 7, characterized in that A connecting frame (22) is provided in the column (2), and the action end of the elevator (31) is transmission-connected to the connecting frame (22) via a bolt, and when the column (2) and the lifting end of the elevator (31) descend to the lowest point, a buffer gap exists between the lifting end of the elevator (31) and the connecting frame (22).

9. The lifting column according to claim 1, characterized in that The barrel assembly (1) comprises an outer barrel (11), a cover plate (12) and a sleeve (13); The outer cylinder (11) is a tubular structure with openings at both ends. The outer side wall of the outer cylinder (11) is provided with anti-slip protrusions. The cover plate (12) is provided to cover the opening at the top end of the outer cylinder (11). The lifting port is provided on the cover plate (12), and the shape of the lifting port matches the cross-sectional shape of the column (2). The sleeve (13) is arranged on a side of the cover plate (12) facing the outer cylinder (11), and the column (2) is slidably arranged in the sleeve (13).

10. The lifting column according to claim 9, characterized in that The inner side wall of the sleeve (13) is provided with a bushing (14), and the inner side wall of the bushing (14) is provided with a brush.

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