Lifting structure of lifting table and lifting table

Abstract

The utility model provides a lifting structure of a lifting table and the lifting table. The lifting structure comprises a lifting stand column; the driving box is arranged at one end of the lifting stand column, and a containing space is formed in the driving box; the driving motor is installed in the containing space and used for driving the lifting stand column to execute ascending or descending actions; the blocking induction piece is arranged on a machine body of the driving motor; and the controller is used for controlling the lifting stand column. The lifting table solves the technical problems that in the prior art, a strain gauge of a lifting table is arranged on a mounting frame, when the lifting table is blocked in ascending or descending, extrusion force detected by the strain gauge is weaker than extrusion force generated at the blocked source position due to transmission of a multi-stage structure, and the lifting table is not blocked in ascending or descending. Therefore, the strain gauges are difficult to clearly detect the resistance condition at the first time, so that the lifting table cannot return or stop in time.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting desks, and more specifically, to a lifting structure of a lifting desk and a lifting desk. Background Art

[0002] With the continuous development of technology and economy, smart home and smart office have become the mainstream. For example, for a lifting desk, its lifting is mainly achieved by a lifting column controlled by a motor. And when there are obstacles during the lifting process, strain gauges are usually used to detect whether the lifting desk encounters resistance and make corresponding controls.

[0003] However, there are at least the following problems in the related art: In the prior art, the strain gauge of the lifting desk is arranged on the mounting frame. When the lifting desk encounters resistance during the ascending or descending movement, the extrusion force detected by the strain gauge is weaker than the extrusion force generated at the position of the resistance source because it is transmitted through multiple structures. Therefore, it is difficult for the strain gauge to clearly detect the resistance situation in the first time, resulting in the failure of the lifting desk to retreat or stop in time. Summary of the Utility Model

[0004] The technical problem solved by the utility model is that in the prior art, the strain gauge of the lifting desk is arranged on the mounting frame. When the lifting desk encounters resistance during the ascending or descending movement, the extrusion force detected by the strain gauge is weaker than the extrusion force generated at the position of the resistance source because it is transmitted through multiple structures. Therefore, it is difficult for the strain gauge to clearly detect the resistance situation in the first time, resulting in the failure of the lifting desk to retreat or stop in time.

[0005] To solve the above problems, the utility model provides a lifting structure of a lifting desk, including: a lifting column; a driving box, the driving box is arranged at one end of the lifting column, and a receiving space is arranged in the driving box; a driving motor, the driving motor is installed in the receiving space and is used to drive the lifting column to perform ascending or descending movements; a resistance sensing member, the resistance sensing member is arranged on the body of the driving motor; a controller, the controller is used to control the lifting column; wherein, when the ascending or descending movement encounters resistance, the resistance sensing member detects the shaking signal generated by the shaking of the driving motor and sends the detection signal to the controller to control the lifting column.

[0006] Compared with the prior art, the technical effect achieved by adopting this technical solution: When the lifting desk encounters resistance during the lifting process, the driving motor serves as the first vibration source, the driving motor can shake, and the shaking degree is greater than other parts of the lifting desk. The resistance sensing member cooperates with the driving motor to clearly detect the resistance situation in the first time and control the lifting desk.

[0007] In one example of the utility model, the obstructed sensing component includes a strain gauge, which is arranged at the detection position of the driving motor; the driving box is provided with a contact portion, which is arranged corresponding to the detection position, and a limiting space is formed between the contact portion and the driving motor; wherein, when the rising or falling action is obstructed, the obstructed sensing component detects the shaking signal generated by the shaking of the driving motor, and sends the detection signal to the controller to control the lifting column.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the lifting table encounters resistance during the lifting process, the strain gauge is arranged on the detection part of the motor on the first vibration source, and the detection part of the driving motor is contacted with the contact part by the displacement of the driving motor, so that the strain gauge is deformed and an obstruction signal is generated, so that the obstruction situation can be clearly detected at the first time, and the strain gauge arranged at the detection part of the driving motor can detect whether the driving motor is operating abnormally.

[0009] The drive box is provided with a contact portion, which is arranged corresponding to the position of the body of the drive motor, and a limit area is formed between the two; the obstructed sensing component includes a strain gauge, and the strain gauge is arranged on the side of the contact portion close to the drive motor; wherein, when the rising or falling action is obstructed, the drive motor shakes, and the drive motor shifts toward the contact portion, so that the body of the drive motor abuts against the strain gauge and is further squeezed, thereby causing the strain gauge to deform.

[0010] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the lifting table encounters resistance during the rising or falling process, the driving motor shakes and shifts toward the position of the contact part, so that the body of the driving motor and the contact part conflict with each other and further squeeze the contact part. The strain gauge is arranged on the contact part and is located on the side where the contact part conflicts with the driving motor. The strain gauge is deformed under the action of the squeezing force of the driving motor, thereby generating an electrical signal and sending it to the controller to control the lifting column to retreat or stop.

[0011] In one example of the utility model, the drive box includes an upper shell and a lower shell; the upper shell is buckled on the lower shell and the upper shell is arranged in cooperation with the drive motor; the side of the lower shell away from the upper shell is connected to the lifting column, and the other side is arranged in cooperation with the reduction box; wherein the contact part is arranged on the upper shell.

[0012] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the combination of the upper shell and the lower shell is more convenient during installation and disassembly, while protecting the drive motor from external interference during operation.

[0013] In an example of the present invention, the upper shell and the contact portion are an integrated structure.

[0014] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The integrated structure of the contact part and the housing is more convenient during the assembly process and reduces costs.

[0015] In an example of the present utility model, on one side of the drive motor away from the output end of the drive motor, there is a motor base, and the structure of the motor base corresponds to the structure of the upper housing; the motor base includes a mounting groove and a mounting hole, the drive motor is connected to the motor base through the mounting hole, and the mounting groove cooperates with the contact part.

[0016] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By setting the motor base to correspond to the structure of the upper housing, the strain gauge and the contact part can interact better with each other.

[0017] In an example of the present utility model, the lifting structure includes a reduction gearbox, the reduction gearbox is arranged on one side of the lower housing close to the drive motor and is connected to the drive motor; at the position where the lower housing corresponds to the connection with the lifting column, there is a slot hole; the lifting column includes a lead screw assembly, the lead screw assembly is arranged inside the lifting column, and one end of the lead screw assembly is connected to the reduction gearbox through the slot hole.

[0018] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The drive motor realizes the lifting function of the lifting column through the lead screw assembly. When the lifting table encounters resistance during the lifting process, the lead screw assembly acts on the reduction gearbox in the reverse direction, and the transmission parts in the reduction gearbox are decelerated through the structural setting of the reduction gearbox.

[0019] In an example of the present utility model, the lifting column includes a first sleeve; a second sleeve, the second sleeve can move relative to the first sleeve, and the first sleeve is nested inside the second sleeve; a third sleeve, the second sleeve can move relative to the third sleeve, and the third sleeve is nested inside the second sleeve. Among them, a drive box is provided on the third sleeve.

[0020] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Through the mutual combination structure of the first sleeve, the second sleeve, and the third sleeve, the lifting table can meet the requirements for the height of the table body of the lifting table in most scenarios.

[0021] In an example of the present utility model, the drive box includes a base and a mounting wall, and the mounting wall is arranged at positions on both opposite sides of the base for connecting the upper housing.

[0022] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The base is used to support the drive motor and other components of the lifting table, and this structure is simple and convenient for installation and disassembly.

[0023] In an example of the present utility model, a lifting table is provided. The lifting table includes any one of the above-mentioned lifting structures; it includes a tabletop, and the tabletop is cooperatively connected with a lifting column.

[0024] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The lifting table in this example has all the beneficial effects of the lifting structure of any embodiment of the present utility model, and will not be elaborated one by one here.

[0025] After adopting the technical solution of the present utility model, the following technical effects can be achieved:

[0026] (1) The driving motor is connected to the reduction gearbox, and the reduction gearbox is provided with a movable margin, enabling the driving motor to shake. The driving motor serves as the first vibration source, and the change is large when it is blocked compared to other positions of the lifting table. The blocking sensing member cooperates with the driving motor to clearly detect the blocking situation and control the lifting column;

[0027] (2) The strain gauge is arranged on the driving motor to detect whether there is a fault in the driving motor itself;

[0028] (3) The structure of the present utility model is simple, with low production difficulty and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts;

[0030] Figure 1 It is a schematic diagram of a lifting structure provided by the present utility model.

[0031] Figure 2 For Figure 1 It is a schematic diagram of the combined structure of the lower housing and the driving motor from a certain perspective in

[0032] Figure 3 For Figure 2 It is a schematic diagram of the motor seat from a certain perspective in

[0033] Figure 4 For Figure 1 It is a schematic diagram of the upper housing from a certain perspective in

[0034] Figure 5 For Figure 1 It is a cross-sectional view of the lifting structure without a housing from a certain perspective in

[0035] Figure 6 ForFigure 1 Schematic diagram of the structure of the third sleeve from a certain perspective.

[0036] Figure 7 For Figure 1 Schematic diagram of the structure of the second sleeve from a certain perspective.

[0037] Explanation of reference numerals:

[0038] 1. Lifting column; 11. Lead screw assembly; 101. First sleeve; 102. Second sleeve; 103. Third sleeve; 104. Limit groove; 2. Driving motor; 21. Strain gauge; 22. Motor base; 221. Mounting hole; 222. Mounting groove; 23. Reduction gearbox; 230. Adapter; 231. Adapter post; 232. First fixing hole; 233. Second fixing hole; 234. First screw; 235. Second screw; 3. Lower housing; 301. Mounting wall; 302. Base; 4. Upper housing; 401. Contact part. Detailed implementation manners

[0039] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings.

[0040] Refer to Figure 1 and Figure 2 , the present utility model provides a lifting structure of a lifting table, including: a lifting column 1; a driving box, the driving box is arranged at one end of the lifting column 1, and an accommodating space is arranged in the driving box; a driving motor 2, the driving motor 2 is installed in the accommodating space and is used to drive the lifting column 1 to perform a rising or falling action; a blocking sensing member, the blocking sensing member is arranged on the body of the driving motor 2; a controller, the controller is used to control the lifting column 1; wherein, when the rising or falling action is blocked, the blocking sensing member detects a shaking signal generated by the shaking of the driving motor 2 and sends the detection signal to the controller to control the lifting column 1.

[0041] Specifically, the driving motor 2 is installed in the accommodating space in the driving box, and the driving motor 2 can move in the accommodating space. The driving motor 2 is connected to the lifting column 1 through a transmission member. When the lifting table encounters an obstacle, the lifting column 1 acts on the driving motor 2 in the reverse direction, causing the driving motor 2 to shake in the accommodating space. The blocking sensing member is arranged on the body of the driving motor 2. When detecting the shaking of the driving motor 2, it sends the detection signal to the controller, and the controller receives the detection signal and controls the lifting column 1 to perform a retracting or stopping action.

[0042] Optionally, the transmission component is a bearing, and the bearing is installed in the reduction box 23. The lifting column 1 is provided with a screw assembly 11, and a first fixing hole 232 and a second fixing hole 233 are provided around the outer side of the reduction box 23, wherein the fixing member is a first screw 234 and a second screw 235, wherein the first screw 234 is tightly fitted on the drive box through the first fixing hole 232, so that the reduction box 23 is fixed on the drive box, and the second fixing hole 233 has a margin, and the second screw 235 is loosely fitted on the drive box through the second fixing hole 233. This design enables the reduction box 23 to shake within the margin range, and the gear part of the above-mentioned bearing is connected to the output end of the drive motor 2. The center part of the bearing is engaged, and is connected to the screw assembly 11 to realize the transmission of torque to the drive motor 2 under normal circumstances. When the lifting column 1 rises or falls and encounters resistance, the lifting column 1 is blocked, and the screw assembly 11 reversely controls the bearing. At the same time, the structure of the reduction box 23 causes the bearing to slow down, while the drive motor 2 still works normally, so that the bearing speed does not match the speed of the output end of the drive motor 2, thereby generating an interaction force at the matching position between the bearing and the drive motor 2. The drive motor 2 is connected to the reduction box 23, so that the drive motor 2 shakes and deflects within the margin range, and the resistance detector cooperates with the drive motor 2 to clearly detect the obstruction.

[0043] In one example, the obstructed sensing element includes a strain gauge 21, which is disposed at a detection position of the drive motor 2; a drive box is provided with a contact portion 401, which is disposed corresponding to the detection position, and a limiting space is formed between the contact portion 401 and the drive motor 2; wherein, when the ascending or descending action is obstructed, the drive motor 2 shakes, and the drive motor 2 shifts toward the contact portion 401, causing the strain gauge 21 to deform.

[0044] Preferably, the detection part is located on both sides of the deflection direction of the drive motor 2, the strain gauge 21 is arranged on the detection part, and the contact part 401 is arranged at both ends of the running track of the drive motor 2 and close to the strain gauge 21, so as to form a limit space to limit the deflection of the drive motor 2. When the lifting column 1 encounters resistance during the rising or falling action and the drive motor 2 shakes and deflects, the contact part 401 and the strain gauge 21 are in contact with each other, and the strain gauge 21 is squeezed and deformed by the contact part 401, so that the resistance of the strain gauge 21 changes, and the electrical level also changes, so as to generate an electrical signal and transmit it to the controller. The controller receives the electrical signal and controls the lifting column 1 to retreat or stop.

[0045] Optionally, the strain gauge 21 can also be arranged at any position on the body of the drive motor 2, and a contact part 401 is arranged corresponding to the position of the strain gauge 21. When the lifting table encounters resistance, the strain gauge 21 abuts against the contact part 401, and the contact part 401 further squeezes the strain gauge 21 to cause the strain gauge 21 to deform, generating an electrical signal and sending it to the controller, thereby controlling the lifting column 1 to retract or stop.

[0046] In one example, the drive box is provided with a contact part 401, and the contact part 401 is arranged corresponding to the position of the drive motor 2, and a limiting area is formed between the two; the obstruction sensing part includes a strain gauge 21, and the strain gauge 21 is arranged on one side of the contact part 401 close to the drive motor 2; wherein, when the ascending or descending movement encounters resistance, the drive motor 2 shakes, and the drive motor 2 deflects towards the contact part 401, causing the strain gauge 21 to deform.

[0047] Specifically, the strain gauge 21 is installed on the side surface of the contact part 401 close to the drive motor 2, and the strain gauge 21 can be in contact with the body of the drive motor 2. When the lifting table encounters resistance during the ascending or descending process, the drive motor 2 serves as the first vibration source, the drive motor 2 shakes and deflects, the body of the drive motor 2 abuts against the strain gauge 21 arranged on the contact part 401, and the drive motor 2 further squeezes the strain gauge 21, causing the strain gauge 21 to deform, the resistance to change, generating an electrical signal to control the lifting column 1 to retract or stop.

[0048] See Figure 4 As shown in, in one example of the present utility model, the drive box includes an upper shell 4 and a lower shell 3; the upper shell 4 is buckled on the lower shell 3 and the upper shell 4 is arranged in cooperation with the drive motor 2; one side of the lower shell 3 away from the upper shell 4 is connected to the lifting column 1; wherein, the contact part 401 is arranged on the upper shell 4.

[0049] Specifically, a contact part 401 is arranged inside the upper shell 4 to form a limiting structure, and the drive motor 2 is correspondingly installed in the limiting structure of the upper shell 4, so that the drive motor 2 deflects within the range of the limiting structure. The upper shell 4 and the lower shell 3 are buckled to form a closed space. The lower shell 3 is connected to the lifting column 1, and the drive motor 2 is located in the limiting structure and is connected to the lifting column 1 through a transmission structure to achieve the transmission of the torque of the drive motor 2.

[0050] Preferably, the upper shell 4 and the contact part 401 are of an integral structure. The integral structure is more convenient to install and reduces the cost at the same time.

[0051] See Figure 3, on one side of the drive motor 2 away from the output end of the drive motor 2, there is a motor base 22, and the structure of the motor base 22 corresponds to the structure of the upper housing 4; the motor base 22 includes a mounting groove 222 and a mounting hole 221, and the drive motor 2 is connected to the motor base 22 through the mounting hole 221, and the mounting groove 222 cooperates with the contact portion 401.

[0052] Specifically, the motor base 22 is provided on one side of the drive motor 2 away from the output end of the drive motor 2, and the motor base 22 is an arched structure. The mounting hole 221 is located on the side of the motor base 22 and close to the center position. At two opposite ends on the outer arc of the motor base 22, there are two grooves as the mounting grooves 222. The detection part of the drive motor 2 is located at the position of the mounting groove 222. There is a distance between the mounting groove 222 and the mounting hole 221 to prevent the normal working vibration of the drive motor 2 from directly affecting the strain gauge 21. The bottom of the motor base 22 is a smooth plane. When the ascending or descending movement is blocked, the motor base 22 and the drive motor 2 move synchronously on the drive box 3.

[0053] See Figure 5 , in an example of the present utility model, the lifting structure includes a reduction gearbox 23. The reduction gearbox 23 is provided on one side of the lower housing 3 close to the drive motor 2, and the reduction gearbox 23 is connected to the drive motor 2; at the position where the lower housing 3 corresponds to the connection with the lifting column 1, there is a slot; the lifting column 1 includes a lead screw assembly 11. The lead screw assembly 11 is provided inside the lifting column 1, and one end of the lead screw assembly 11 is connected to the reduction gearbox 23 through the slot.

[0054] Specifically, the connection between the lead screw assembly 11 and the bearing is achieved by the mating column 231 and the fitting 230 provided at the center of the inner shaft of the bearing, and the mating column 231 and the fitting 230 are nested and linked with each other.

[0055] See Figure 1 , Figure 6 and Figure 7 , in an example of the present utility model, the lifting column 1 includes a first sleeve 101; a second sleeve 102, the second sleeve 102 can move relative to the first sleeve 101, and the first sleeve 101 is nested inside the second sleeve 102; a third sleeve 103, the second sleeve 102 can move relative to the third sleeve 103, and the third sleeve 103 is nested inside the second sleeve 102. Among them, the drive box 3 is provided on the third sleeve 103.

[0056] Optionally, the torque of the driving motor 2 is transmitted through the lead screw assembly 11. A plurality of limiting grooves 104 are provided at one end of the third sleeve 103 away from the driving box to realize the relative sliding between the third sleeve 103 and the second sleeve 102. Similarly, a plurality of limiting grooves 104 are provided at one end of the second sleeve 102 away from the driving box to realize the relative sliding between the second sleeve 102 and the first sleeve 101. Overall, the lifting and lowering actions of the lifting column 1 are realized.

[0057] Optionally, friction plates are provided between the inner side of the lifting end of the first sleeve 101 and the second sleeve 102, and also between the inner side of the lifting end of the second sleeve 102 and the third sleeve 103. The friction plates are used to protect and stabilize the lifting or lowering actions of the lifting column 1.

[0058] In an example of the present utility model, the lower housing 3 includes a base 302 and a mounting wall 301. The mounting walls 301 are provided at opposite sides of the base 302 and are used to connect the upper housing 4.

[0059] Optionally, the mounting wall 301 is of an L-shaped structure. The L-shaped structure of the mounting wall 301 is used for mounting the lifting structure on the lifting table. The vertical structure part of the L-shaped structure of the upper housing 4 abuts against the mounting wall 301 to form an interlocking relationship between the upper housing 4 and the lower housing 3. The upper housing 4 is connected to the base 302 by screws to further strengthen the fixation.

[0060] Preferably, the lifting column 1 is a square tube. The use of a square tube for the lifting column 1 is more convenient and less costly in production and manufacturing. Since the cross-sectional area of the square tube is large and the cross-sectional shape has good anti-torsion performance, the square tube between the first sleeve 101, the second sleeve 102 and the third sleeve 103 can better resist tension and bending when subjected to external forces.

[0061] In an example of the present utility model, a lifting table is provided. The lifting table includes any one of the above-mentioned lifting structures; a tabletop, and the tabletop is cooperatively connected with the lifting column 1.

[0062] Specifically, the lifting table is provided with the lifting structure of any one of the technical solutions in the above embodiments, and thus has at least the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0063] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the scope defined by the claims.

Claims

1. A lifting structure of a lifting table, characterized in that: include: Lifting column (1); A drive box, the drive box being arranged at one end of the lifting column (1), and a receiving space being arranged inside the drive box; A drive motor (2), the drive motor (2) being installed in the accommodation space and used to drive the lifting column (1) to perform an ascending or descending action; An obstructed sensing component, the obstructed sensing component being arranged on the body of the driving motor (2); A controller, the controller being used to control the lifting column (1); Wherein, when the ascending or descending action is obstructed, the obstructed sensing component detects a shaking signal generated by the shaking of the driving motor (2), and sends the detection signal to the controller to control the lifting column (1).

2. The lifting structure according to claim 1, characterized in that: The obstructed sensing component comprises a strain gauge (21), and the strain gauge (21) is arranged at a detection position of the drive motor (2); The drive box is provided with a contact portion (401), the contact portion (401) is arranged corresponding to the detection portion, and a limiting space is formed between the contact portion (401) and the drive motor (2); When the ascending or descending action is blocked, the drive motor (2) shakes, and the drive motor (2) deviates toward the contact portion (401), causing the strain gauge (21) to deform.

3. The lifting structure according to claim 1, characterized in that: The drive box is provided with a contact portion (401), the contact portion (401) and the drive motor (2) are arranged in a corresponding position and a limiting area is formed between the two; The obstructed sensing component comprises a strain gauge (21), and the strain gauge (21) is arranged on a side of the contact portion (401) close to the drive motor (2); When the ascending or descending action is blocked, the drive motor (2) shakes, and the drive motor (2) deviates toward the contact portion (401), causing the strain gauge (21) to deform.

4. The lifting structure according to any one of claims 2 or 3, characterized in that: The drive box comprises an upper shell (4) and a lower shell (3); The upper housing (4) is buckled onto the lower housing (3) and the upper housing (4) is arranged in coordination with the drive motor (2); A side of the lower shell (3) away from the upper shell (4) is connected to the lifting column (1); Wherein, the contact portion (401) is arranged on the upper shell (4).

5. The lifting structure according to claim 4, characterized in that: The upper shell (4) and the contact portion (401) are an integral structure.

6. The lifting structure according to claim 4, characterized in that: A motor seat (22) is provided on a side of the drive motor (2) away from the output end of the drive motor (2), and the structure of the motor seat (22) corresponds to the structure of the upper housing (4); The motor seat (22) comprises a mounting groove (222) and a mounting hole (221); the drive motor (2) is connected to the motor seat (22) via the mounting hole (221); and the mounting groove (222) cooperates with the contact portion (401).

7. The lifting structure according to claim 4, characterized in that: include: A reduction box (23), the reduction box (23) being arranged on a side of the lower housing (3) close to the drive motor (2), and the reduction box (23) being connected to the drive motor (2); The lower shell (3) is provided with a slotted hole at a position corresponding to the connection with the lifting column (1); The lifting column (1) comprises a screw assembly (11), wherein the screw assembly (11) is arranged inside the lifting column (1), and one end of the screw assembly (11) is connected to the reduction box (23) through the slotted hole.

8. The lifting structure according to claim 1, characterized in that: The lifting column (1) comprises a first sleeve (101); a second sleeve (102), wherein the second sleeve (102) and the first sleeve (101) are movable relative to each other, and the first sleeve (101) is nested inside the second sleeve (102); a third sleeve (103), wherein the second sleeve (102) and the third sleeve (103) are relatively movable, and the third sleeve (103) is nested inside the second sleeve (102). Wherein, the drive box is provided on the third sleeve (103).

9. The lifting structure according to claim 4, characterized in that: The lower shell (3) comprises a base (302) and a mounting wall (301); the mounting wall (301) is arranged at two opposite sides of the base (302) and is used for connecting to the upper shell (4).

10. A lifting table, characterized in that: include: The lifting structure according to any one of claims 1 to 9; A table top, the table top is cooperatively connected with the lifting column (1).

Images