Lifting stand column and lifting table

Abstract

The utility model provides a lifting stand column and a lifting table, and the lifting stand column comprises at least two column pipes which comprise a first column pipe and a second column pipe which ascends or descends relative to the first column pipe; the driving assembly is arranged in the second column pipe, the driving assembly comprises a driving part and a gear transmission mechanism, the driving part and the gear transmission mechanism are both arranged in the second column pipe, a driving shaft of the driving part drives the gear transmission mechanism to rotate, and the axis of the driving shaft is parallel to the axis of the second column pipe; the lead screw assembly is arranged in the first column pipe and the second column pipe and is in driving connection with the gear transmission mechanism, and the gear transmission mechanism drives the lead screw assembly to move so that the second column pipe can ascend or descend relative to the first column pipe. According to the technical scheme, the problems that in the prior art, the size of a lifting stand column is large, and the occupied space of the position where the lifting stand column is located is large are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to office product technical field, specifically, a kind of lifting column and lifting desk. BACKGROUND

[0002] Electric lifting table relies on motor control lifting column, realizes one-key automatic lifting by button, and it is a kind of office product welcomed in today's market.

[0003] The lifting column in the related art is mainly composed of a column outer tube, a column inner tube, a screw rod assembly, a bottom box and a driving assembly. The column inner tube is installed inside the column outer tube, and the screw rod assembly is arranged inside the column inner tube. The bottom box is fixedly connected to the upper end of the column inner tube, and the driving assembly is located in the bottom box and arranged perpendicular to the axial direction of the column inner tube and in transmission cooperation with the transmission assembly.

[0004] The driving assembly is arranged perpendicular to the axial direction of the column inner tube, so that the volume of the lifting column is large, and the space occupied by the position is large. SUMMARY

[0005] The main purpose of the utility model is to provide a lifting column and a lifting desk to solve the problem of large volume of the lifting column in the related art and large space occupied by the position.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a lifting column is provided, which comprises: at least two column pipes, including a first column pipe and a second column pipe that rises or descends relative to the first column pipe; a driving assembly arranged in the second column pipe, the driving assembly comprising a driving member and a gear transmission mechanism, the driving member and the gear transmission mechanism are both arranged in the second column pipe, the driving shaft of the driving member drives the gear transmission mechanism to rotate, wherein the axis of the driving shaft is arranged in parallel with the axis of the second column pipe; a screw rod assembly arranged in the first column pipe and the second column pipe and drivingly connected with the gear transmission mechanism, the gear transmission mechanism drives the screw rod assembly to move, so that the second column pipe rises or descends relative to the first column pipe.

[0007] Further, the gear transmission mechanism comprises a planetary gear transmission mechanism and a coupling, the sun gear of the planetary gear transmission mechanism is drivingly connected with the driving shaft, the planetary gear of the planetary gear transmission mechanism is drivingly connected with the planetary gear carrier of the planetary gear transmission mechanism, and the planetary gear carrier drives the screw rod assembly to move through the coupling.

[0008] Further, the planetary gear transmission mechanism is a plurality of sequentially drivingly connected planetary gear transmission mechanisms, the sun gear of the first planetary gear transmission mechanism is drivingly connected with the driving shaft, and the planetary gear carrier of the last planetary gear transmission mechanism drives the screw rod assembly to move through the coupling.

[0009] Further, the planet carrier of the planetary gear mechanism drives the coupling to rotate through the elastic pad structure, and the gear transmission mechanism further comprises a key connecting piece, and the elastic pad structure is drivingly connected with the coupling through the key connecting piece in the axial direction of the coupling.

[0010] Further, the driving assembly further comprises a soundproof sleeve arranged in the second column pipe and two buffer covers arranged at two ends of the soundproof sleeve, the soundproof sleeve is arranged outside the driving member and the gear transmission mechanism, one buffer cover is arranged outside the end of the driving member away from the coupling, and the other buffer cover is arranged outside the end of the gear transmission mechanism away from the driving member.

[0011] Further, the screw rod assembly comprises a driving pipe, a first screw rod assembly and a second screw rod assembly, the driving pipe is arranged in the second column pipe and drivingly connected with the gear transmission mechanism, the first screw rod assembly is rotatably and movably arranged in the driving pipe, the first end of the first screw rod assembly is located in the driving pipe and drivingly connected with the driving pipe, the second end of the first screw rod assembly can extend out of the driving pipe and drivingly connected with the second screw rod assembly, the end of the second screw rod assembly away from the first screw rod assembly is connected with the first column pipe, and the first screw rod assembly rotates and moves relative to the second screw rod assembly, so that the second column pipe rises or falls relative to the first column pipe.

[0012] Further, the first screw rod assembly comprises a first screw rod and a first nut matched with each other, one of the first screw rod and the first nut is drivingly connected with the driving pipe, and the other of the first screw rod and the first nut is connected with the second column pipe, the second screw rod assembly comprises a second screw rod and a second nut matched with each other, one of the second screw rod and the second nut is connected with the first column pipe, and the other of the second screw rod and the second nut is connected with the first screw rod.

[0013] Further, the at least two column pipes further comprise a third column pipe, the first end of the third column pipe is nested into the first column pipe, and the second end of the third column pipe is sleeved outside the second column pipe, the first screw rod is drivingly connected with the driving pipe, the first nut is connected with the second column pipe, the second screw rod is connected with the first column pipe, the second nut is connected with the first screw rod, the second nut is limited in the first end of the third column pipe through the end sleeve assembly, and the driving pipe drives the first screw rod and the second nut to synchronously screw when rotating, so that the second nut rotates in the end sleeve assembly and drives the third column pipe to move.

[0014] Further, the end sleeve assembly comprises an end sleeve connected with the first end of the third column pipe and a sliding sleeve sleeved outside the second nut, the outer wall of the second nut is provided with a convex ring, the inner wall of the end sleeve is provided with a first limiting wall, and the inner wall of the sliding sleeve is provided with a second limiting wall, and the convex ring is limited between the first limiting wall and the second limiting wall in the axial direction of the second nut.

[0015] According to another aspect of the utility model, provide a kind of lifting table, including table board and the lifting column of setting at the bottom of table board, lifting column is above described lifting column.

[0016] The utility model discloses technical scheme, lifting column includes: at least two column pipes, drive assembly and screw rod assembly.At least two column pipes include first column pipe and the second column pipe that is relative to the first column pipe ascending or descending.Drive assembly is arranged in the second column pipe, and drive assembly includes driving piece and gear transmission mechanism, and driving piece and gear transmission mechanism are all arranged in the second column pipe, and the driving shaft of driving piece drives gear transmission mechanism to rotate, and the axis of driving shaft is parallel with the axis of second column pipe.Setting.Gear transmission mechanism drives screw rod assembly to be active, to make the second column pipe ascend or descend relative to the first column pipe.Because the axis of driving shaft of the present application is parallel with the axis of second column pipe, so that drive assembly can adapt to the internal space of second column pipe, compactly set in the second column pipe, avoid the second column pipe adaptation drive assembly to improve, and the volume of lifting column caused is relatively large, and the space occupied by the position of lifting column is reduced.Therefore, the technical scheme of the present application effectively solves the problem of the volume of lifting column in the related art, and the space occupied by the position is relatively large.And the axis of driving shaft is parallel with the axis of second column pipe, so that the center of gravity of lifting column is lower, and the process of the second column pipe ascending or descending relative to the first column pipe is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification provide further understanding of the application, and serve as an example of the application, and its description is used to explain the application, and does not constitute an improper limitation on the application. In the drawings:

[0018] Figure 1 The figure shows the three-dimensional structure schematic diagram of the embodiment of the lifting column according to the utility model;

[0019] Figure 2 The figure shows the cross-sectional schematic diagram of the lifting column of Figure 1 ;

[0020] Figure 3 The figure shows the partial structure exploded structure schematic diagram of the lifting column of Figure 1 ;

[0021] Figure 4 The figure shows the cross-sectional three-dimensional structure schematic diagram of the lifting column of Figure 1 ;

[0022] Figure 5 The figure shows the enlarged schematic diagram of the A of the lifting column of Figure 4 ;

[0023] Figure 6 An enlarged schematic view of B of the lifting column is shown. Figure 4

[0024] Figure 7 A perspective structural schematic view of an embodiment of the lifting table according to the present application is shown.

[0025] Figure 8 An enlarged schematic view of B of the lifting table is shown. Figure 7 A side schematic view of the lifting table is shown.

[0026] Wherein, the above drawings include the following reference signs:

[0027] 11, first column pipe; 12, second column pipe; 13, third column pipe;

[0028] 20, driving member; 21, driving shaft;

[0029] 30, gear transmission mechanism; 31, planetary gear transmission mechanism; 311, sun gear; 312, planet gear; 313, planet carrier; 32, coupling; 33, elastic pad structure; 34, key connecting member;

[0030] 40, screw rod assembly; 41, driving pipe; 42, first screw rod assembly; 421, first screw rod; 422, first nut; 43, second screw rod assembly; 431, second screw rod; 432, second nut; 433, convex ring;

[0031] 51, soundproof sleeve; 52, buffer cover;

[0032] 60, end sleeve assembly; 61, end sleeve; 611, first limiting wall; 62, sliding sleeve; 621, second limiting wall; 63, fixed strip; 631, wear-reducing member;

[0033] 71, table board; 72, lifting column. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0035] ​It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0036] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail because they can be readily understood from the disclosure and descriptions here. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example, and not as a limitation. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further

[0037] As shown in FIG. 1, Figures 1 to 5 The present application provides a lifting column, an embodiment of the lifting column includes at least two column pipes, a driving assembly and a screw assembly 40. The at least two column pipes include a first column pipe 11 and a second column pipe 12 which is raised or lowered relative to the first column pipe 11. The driving assembly is arranged in the second column pipe 12, and includes a driving member 20 and a gear transmission mechanism 30, both of which are arranged in the second column pipe 12, and the driving shaft 21 of the driving member 20 drives the gear transmission mechanism 30 to rotate, wherein the axis of the driving shaft 21 is arranged in parallel with the axis of the second column pipe 12. The screw assembly 40 is arranged in the first column pipe 11 and the second column pipe 12, and is drivingly connected with the gear transmission mechanism 30, and the gear transmission mechanism 30 drives the screw assembly 40 to move, so as to raise or lower the second column pipe 12 relative to the first column pipe 11.

[0038] According to the technical scheme of the embodiment of the lifting column, the axis of the drive shaft 21 is arranged in parallel with the axis of the second column tube 12, so that the drive assembly can adapt to the internal space of the second column tube 12 and be compactly arranged in the second column tube 12, thereby avoiding the improvement of the second column tube 12 adapting to the drive assembly, the large size of the lifting column, and the large space occupied by the position of the lifting column. Therefore, the technical scheme of the embodiment of the lifting column effectively solves the problems of the large size of the lifting column and the large space occupied by the position of the lifting column in the related art. Moreover, the axis of the drive shaft 21 is arranged in parallel with the axis of the second column tube 12, so that the center of gravity of the lifting column is lower, and the process of the second column tube 12 rising or falling relative to the first column tube 11 is more stable. Moreover, the lifting column has the following advantages: modular design, convenient installation, compact structure, high stability, and an overall appearance that is beautiful and novel; there are very few similar products on the market, and the lifting column has strong competitiveness.

[0039] As shown in Figures 1 to 5 The gear transmission mechanism 30 includes a planetary gear transmission mechanism 31 and a shaft coupling 32. The sun gear 311 of the planetary gear transmission mechanism 31 is in transmission connection with the drive shaft 21. The planet gear 312 of the planetary gear transmission mechanism 31 is in transmission connection with the planet gear carrier 313 of the planetary gear transmission mechanism 31. The planet gear carrier 313 drives the screw assembly 40 to move through the shaft coupling 32. The planetary gear transmission mechanism 31 can achieve high-efficiency power transmission. Since the sun gear 311 is directly connected with the drive shaft 21, the rotation of the drive shaft 21 can be directly and quickly transmitted to the planet gear 312. Then, through the cooperation of the planet gear carrier 313 and the shaft coupling 32, the power is transmitted to the screw assembly 40. Such a design significantly enhances the response speed and transmission efficiency of the gear transmission mechanism 30. Meanwhile, the compact structure of the planetary gear transmission mechanism 31 helps to improve the space utilization of the entire lifting column, reduces the energy loss in the transmission path, and thus improves the operation efficiency and stability of the entire lifting column.

[0040] As shown in Figures 1 to 5 The planetary gear transmission mechanism 31 is a plurality of planetary gear transmission mechanisms connected in sequence and constitutes multiple stages. The sun gear 311 of the first planetary gear transmission mechanism 31 is in transmission connection with the drive shaft 21. The planet gear carrier 313 of the last planetary gear transmission mechanism 31 drives the screw assembly 40 to move through the shaft coupling 32. By connecting multiple planetary gear transmission mechanisms 31 in series, a larger transmission ratio and torque transmission can be achieved without significantly increasing the size, so that the lifting column 72 can stably support a heavier table plate 71 and improve the load-bearing capacity of the lifting table. Meanwhile, the design of the multi-stage planetary gear reduces the torque borne by a single gear, prolongs the service life of the gear, and ensures the long-term stable working performance of the lifting column.

[0041] The driving shaft rotates to drive the sun gear of the first-stage planetary gear mechanism 31 to rotate, which drives the planetary gears of the first-stage planetary gear mechanism 31 to rotate in the inner ring gear of the first-stage planetary gear mechanism 31. The inner ring gear is fixed, and the three planetary gears of the first-stage planetary gear mechanism 31 are fixed with the carrier of the first-stage planetary gear mechanism 31 through a pin shaft, so the carrier of the first-stage planetary gear mechanism 31 also rotates. The sun gear structure of the second-stage planetary gear mechanism 31 is integrated with the carrier of the first-stage planetary gear mechanism 31, so the sun gear of the second-stage planetary gear mechanism 31 also rotates. The rotation of the second-stage sun gear drives the planetary gears of the second-stage planetary gear mechanism 31 to rotate in the inner ring gear. The three planetary gears of the second-stage planetary gear mechanism 31 are fixed with the carrier of the second-stage planetary gear mechanism 31, so the carrier of the second-stage planetary gear mechanism 31 also rotates. The carrier of the second-stage planetary gear mechanism 31 is provided with a spline structure at the top end, which drives the coupling 32 to rotate through the elastic pad structure below, similar to the elastic coupling structure.

[0042] As shown in Figures 1 to 5 , the carrier 313 of the planetary gear mechanism 31 drives the coupling 32 to rotate through the elastic pad structure 33. The gear transmission mechanism 30 further includes a key connection piece 34. In the axial direction of the coupling 32, the elastic pad structure 33 is in transmission connection with the coupling 32 through the key connection piece 34. The introduction of the elastic pad structure 33 can effectively absorb the vibration and impact in the transmission process, reduce noise, and improve user experience. The use of the key connection piece 34 ensures the stable connection and power transmission between the coupling 32 and the carrier 313. Even when the elastic pad structure 33 absorbs vibration, it can also ensure the smooth operation of the lead screw assembly 40, further improving the stability and reliability of the driving assembly. The key connection piece 34 is preferably a spline.

[0043] As shown in Figures 1 to 5 , the driving assembly further includes a soundproof sleeve 51 arranged in the second column pipe 12 and two buffer covers 52 arranged at both ends of the soundproof sleeve 51. The soundproof sleeve 51 is arranged outside the driving member 20 and the gear transmission mechanism 30. One buffer cover 52 is arranged outside the end of the driving member 20 away from the coupling 32, and the other buffer cover 52 is arranged outside the end of the gear transmission mechanism 30 away from the driving member 20. The combination of the soundproof sleeve 51 and the buffer cover 52 can significantly reduce the noise and vibration generated by the driving assembly during operation, providing a quieter working environment. The soundproof sleeve 51 effectively isolates the noise in the transmission process by wrapping the driving member 20 and the gear transmission mechanism 30, and the buffer cover 52 further absorbs the vibration that may be generated at the end, ensuring that the lifting of the lifting column is more stable.

[0044] As shown in Figures 1 to 5 and Figure 8As shown, the screw rod assembly 40 includes a driving tube 41, a first screw rod assembly 42 and a second screw rod assembly 43. The driving tube 41 is arranged in the second column tube 12 and is in driving connection with the gear transmission mechanism 30. The first screw rod assembly 42 is rotatably and movably arranged in the driving tube 41. The first end of the first screw rod assembly 42 is located in the driving tube 41 and is in driving cooperation with the driving tube 41. The second end of the first screw rod assembly 42 can extend out of the driving tube 41 and is in driving connection with the second screw rod assembly 43. The end of the second screw rod assembly 43 away from the first screw rod assembly 42 is connected with the first column tube 11. When the first screw rod assembly 42 rotates and moves relative to the second screw rod assembly 43, the second column tube 12 rises or falls relative to the first column tube 11. The modular design of the screw rod assembly 40 makes the power transmission between the driving tube 41 and the first screw rod assembly 42 and the second screw rod assembly 43 more efficient and has stronger design flexibility. The relative movement of the first screw rod assembly 42 and the second screw rod assembly 43 accurately controls the movement of the second column tube 12 relative to the first column tube 11, thereby realizing the stable and accurate lifting of the table board 71. This design reduces friction and energy loss in the transmission process.

[0045] As shown in the drawings, Figures 1 to 6 The first screw rod assembly 42 includes a first screw rod 421 and a first nut 422 that cooperate with each other. The second screw rod assembly 43 includes a second screw rod 431 and a second nut 432 that cooperate with each other. The first screw rod 421 is in driving cooperation with the driving tube 41. The first nut 422 is connected with the second column tube 12. The second screw rod 431 is connected with the first column tube 11. The second nut 432 is connected with the first screw rod 421. The introduction of the third column tube 13 not only increases the structural stability of the lifting column. The cooperation of the first screw rod 421 and the first nut 422 and the cooperation of the second screw rod 431 and the second nut 432 ensure seamless power transmission from the driving tube 41 to the second column tube 12 and then to the third column tube 13, thereby improving the transmission efficiency and carrying capacity of the lifting column. This design ensures the stability and response speed of the lifting column at different heights. The driving tube 41 is preferably a driving aluminum tube. The second screw rod 431 is fixedly connected with the top plate at the end of the first column tube 11 through a screw.

[0046] The driving member 20 is preferably a motor. A transmission snap ring is installed at the end of the first screw rod 421. The outer side of the transmission snap ring is provided with a guide protrusion. The inner wall of the driving tube 41 is provided with a guide groove that is in guiding cooperation with the guide protrusion. The guide groove extends along the axis direction of the first screw rod 421, so that the driving tube 41 rotates to drive the first screw rod 421 to rotate and move along the axial direction.

[0047] In other embodiments, the first nut 422 is in driving cooperation with the driving tube 41, and the first screw rod 421 is connected with the second column tube 12. The second nut 432 is connected with the first column tube 11, and the second screw rod 431 is connected with the first screw rod 421.

[0048] As Figures 1 to 6 and Figure 8 shown, the at least two column pipes further include a third column pipe 13, a first end of the third column pipe 13 is nested into the first column pipe 11, a second end of the third column pipe 13 is sleeved outside the second column pipe 12, the first screw rod 421 is in transmission cooperation with the driving pipe 41, the first nut 422 is connected with the second column pipe 12, the second screw rod 431 is connected with the first column pipe 11, the second nut 432 is connected with the first screw rod 421, the second nut 432 is limited in the first end of the third column pipe 13 through the end sleeve assembly 60, when the driving pipe 41 rotates, the first screw rod 421 and the second nut 432 are driven to move synchronously in a spiral manner, so that the second nut 432 rotates in the end sleeve assembly 60 and drives the third column pipe 13 to move. The rotation of the driving pipe 41 directly drives the first screw rod 421 to move in a spiral manner, and the connection of the first nut 422 and the second column pipe 12 ensures the up-down movement of the second column pipe 12. The connection of the second screw rod 431 and the first column pipe 11, and the limitation of the second nut 432 in the first end of the third column pipe 13 through the end sleeve assembly 60, build a continuous and efficient transmission link, so that the rotation of the driving pipe 41 can be accurately converted into the lifting movement of the table board 71. This design maximizes the energy loss in the power transmission process, improves the overall efficiency of the lifting column, and also ensures the stability and reliability of the lifting process.

[0049] As Figures 1 to 6 shown, the end sleeve assembly 60 includes an end sleeve 61 connected with the first end of the third column pipe 13 and a sliding sleeve 62 sleeved outside the second nut 432, the outer wall of the second nut 432 is provided with a convex ring 433, the inner wall of the end sleeve 61 is provided with a first limiting wall 611, the inner wall of the sliding sleeve 62 is provided with a second limiting wall 621, and in the axial direction of the second nut 432, the convex ring 433 is limited between the first limiting wall 611 and the second limiting wall 621. In this way, the convex ring 433 can only rotate between the first limiting wall 611 and the second limiting wall 621, and in the process of the spiral movement of the second nut 432, the end sleeve assembly 60 can be moved through the convex ring 433 to drive the third column pipe 13 to move, and since the third column pipe 13 is located between the second end of the third column pipe 13 and the first column pipe 11, it can guide the spiral movement of the second nut 432, so that the first screw rod 421 and the second nut 432 can move stably in a spiral manner, ensuring that the second column pipe 12 moves stably up and down.

[0050] As Figures 1 to 6As shown, in order to facilitate the fixation of the third column pipe 13 and the end sleeve 61 together, the end sleeve assembly 60 further comprises a fixing strip 63 located outside the third column pipe 13 and fixing the third column pipe 13 and the end sleeve 61, and a wear-reducing piece 631 is arranged between the fixing strip 63 and the first column pipe 11. The arrangement of the wear-reducing piece 631 can reduce the contact area between the end sleeve assembly 60 and the inner wall of the first column pipe 11 during movement, so as to improve the service life of the lifting column. The wear-reducing piece 631 is preferably a wear-reducing rib.

[0051] Specifically, the third column pipe 13 is provided with a through hole, the end sleeve 61 is provided with a fixing hole corresponding to the through hole, and the fixing strip 63 has a fixing column which is inserted into the fixing hole through the through hole to fix the third column pipe 13 and the end sleeve 61 together.

[0052] In the embodiment, the fixing strip 63 is preferably a plurality of fixing strips 63 which are arranged outside the third column pipe 13 at intervals in the circumferential direction of the end sleeve 61.

[0053] The application also provides a lifting table, as shown in Figure 7 and Figure 8 As shown, the embodiment of the lifting table comprises a table board 71 and a lifting column 72 arranged at the bottom of the table board 71, and the lifting column is the lifting column described above. Since the lifting column described above can solve the problem of large volume and large space occupation of the lifting column in the related art, the lifting table comprising the lifting column can also solve the same technical problem.

[0054] The lifting table of the application, by integrating the lifting column described above, not only has a more simple appearance, which meets the design trend of modern home and office, but also is more stable and quiet in use, improving the user experience. The efficient transmission and precise control capability of the lifting column 72 ensure that the table board 71 rises and falls quickly and smoothly at different heights, greatly improving the efficiency and comfort of office and study. At the same time, due to the compact structure and small space occupation of the lifting column, the lifting table can also be arranged flexibly in a small space, meeting the use requirements in different scenes.

[0055] The switch of the lifting table is controlled, the motor rotates to drive the driving assembly to move, and the shaft coupling of the driving assembly drives the screw rod assembly to rise or fall, the screw rod assembly is connected with the second column pipe to drive the second column pipe to move.

[0056] In the description of the utility model, need understanding, "multiple" refers to the quantity is two or more than two. The position words such as "before, after, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the position relationship indicated by the position words usually are based on the position relationship shown in the drawing, just for the convenience of describing the utility model and simplifying description, under the condition without making opposite statement, these position words do not indicate and imply the device or element indicated must have specific orientation or with specific orientation structure and operation, therefore can not be understood as the restriction of the protection scope of the utility model;The position words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0057] For the convenience of description, spatial relative terms can be used herein, such as "over", "above", "upper surface", "upper", etc., to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0058] In addition, it should be noted that the use of "first", "second" and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protection scope of the utility model.

[0059] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and the utility model can have various changes and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A lifting column, characterized in that, include: At least two columns, including a first column (11) and a second column (12) that rises or falls relative to the first column (11); A drive assembly is disposed inside the second column tube (12). The drive assembly includes a drive member (20) and a gear transmission mechanism (30). Both the drive member (20) and the gear transmission mechanism (30) are disposed inside the second column tube (12). The drive shaft (21) of the drive member (20) drives the gear transmission mechanism (30) to rotate. The axis of the drive shaft (21) is parallel to the axis of the second column tube (12). A lead screw assembly (40) is disposed in the first column tube (11) and the second column tube (12) and is drivenly connected to the gear transmission mechanism (30). The gear transmission mechanism (30) drives the lead screw assembly (40) to move so that the second column tube (12) rises or falls relative to the first column tube (11).

2. The lifting column according to claim 1, characterized in that, The gear transmission mechanism (30) includes a planetary gear transmission mechanism (31) and a coupling (32). The sun gear (311) of the planetary gear transmission mechanism (31) is connected to the drive shaft (21). The planetary gears (312) of the planetary gear transmission mechanism (31) are connected to the planetary gear carrier (313) of the planetary gear transmission mechanism (31). The planetary gear carrier (313) drives the lead screw assembly (40) to move through the coupling (32).

3. The lifting column according to claim 2, characterized in that, The planetary gear transmission mechanism (31) consists of multiple units connected in sequence. The sun gear (311) of the first planetary gear transmission mechanism (31) is connected to the drive shaft (21). The planetary gear carrier (313) of the last planetary gear transmission mechanism (31) drives the lead screw assembly (40) through the coupling (32).

4. The lifting column according to claim 2, characterized in that, The planetary gear carrier (313) of the planetary gear transmission mechanism (31) drives the coupling (32) to rotate through the elastic pad structure (33). The gear transmission mechanism (30) also includes a key connector (34). In the axial direction of the coupling (32), the elastic pad structure (33) is connected to the coupling (32) through the key connector (34).

5. The lifting column according to any one of claims 2 to 4, characterized in that, The drive assembly also includes a silencing sleeve (51) disposed inside the second column tube (12) and two buffer covers (52) disposed at both ends of the silencing sleeve (51). The silencing sleeve (51) is sleeved on the outside of the drive member (20) and the gear transmission mechanism (30). One buffer cover (52) is disposed on the outside of the end of the drive member (20) away from the coupling (32), and the other buffer cover (52) is disposed on the outside of the end of the gear transmission mechanism (30) away from the drive member (20).

6. The lifting column according to any one of claims 1 to 4, characterized in that, The lead screw assembly (40) includes a drive tube (41), a first lead screw assembly (42), and a second lead screw assembly (43). The drive tube (41) is disposed inside the second column tube (12) and is connected to the gear transmission mechanism (30). The first lead screw assembly (42) is rotatably and movably disposed inside the drive tube (41). The first end of the first lead screw assembly (42) is located inside the drive tube (41) and is connected to the drive tube (41) in a transmission cooperation. The second end of the first lead screw assembly (42) can extend out of the drive tube (41) and is connected to the second lead screw assembly (43) in a drive connection. The end of the second lead screw assembly (43) away from the first lead screw assembly (42) is connected to the first column tube (11). When the first lead screw assembly (42) rotates and moves relative to the second lead screw assembly (43), the second column tube (12) rises or falls relative to the first column tube (11).

7. The lifting column according to claim 6, characterized in that, The first lead screw assembly (42) includes a first lead screw (421) and a first nut (422) that cooperate with each other. One of the first lead screw (421) and the first nut (422) is in transmission engagement with the drive tube (41), and the other of the first lead screw (421) and the first nut (422) is connected to the second column tube (12). The second lead screw assembly (43) includes a second lead screw (431) and a second nut (432) that cooperate with each other. One of the second lead screw (431) and the second nut (432) is connected to the first column tube (11), and the other of the second lead screw (431) and the second nut (432) is connected to the first lead screw (421).

8. The lifting column according to claim 7, characterized in that, At least two of the column tubes also include a third column tube (13), the first end of which is nested inside the first column tube (11), and the second end of which is sleeved outside the second column tube (12). The first lead screw (421) is driven by the drive tube (41). The first nut (422) is connected to the second column tube (12). The second lead screw (431) is connected to the first column tube (11). The second nut (432) is connected to the first lead screw (421). The second nut (432) is limited to the first end of the third column tube (13) by the end sleeve assembly (60). When the drive tube (41) rotates, it drives the first lead screw (421) and the second nut (432) to move synchronously in a spiral motion, so that the second nut (432) rotates in the end sleeve assembly (60) and drives the third column tube (13) to move.

9. The lifting column according to claim 8, characterized in that, The end sleeve assembly (60) includes an end sleeve (61) connected to the first end of the third column tube (13) and a sliding sleeve (62) sleeved outside the second nut (432). A protruding ring (433) is provided on the outer wall of the second nut (432), a first limiting wall (611) is provided on the inner wall of the end sleeve (61), and a second limiting wall (621) is provided on the inner wall of the sliding sleeve (62). In the axial direction of the second nut (432), the protruding ring (433) is limited between the first limiting wall (611) and the second limiting wall (621).

10. A height-adjustable table, comprising a tabletop (71) and a height-adjustable column (72) disposed at the bottom of the tabletop (71), characterized in that, The lifting column is the lifting column as described in any one of claims 1 to 9.

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