Electric lifting worktable

Abstract

The utility model discloses an electric lifting working table which comprises a working table body, a driving assembly and a motor support, the working table body comprises a lifting stand column, and a linear driving mechanism is connected into the lifting stand column; the driving assembly comprises a base, a driving motor and a transmission rod, and the two ends of the transmission rod are in transmission connection with the linear driving mechanisms in the lifting stand columns correspondingly. The motor support is connected to the working table body, and the base is connected with the motor support in a floating mode so as to relieve or eliminate assembly errors between the transmission rod and a gear box in the lifting stand column when the driving assembly is installed. The electric lifting working table can relieve abnormal sound or shaking of the lifting stand column caused by the assembly error of the motor support and the matching precision difference of the transmission rod.

Description

Technical Field

[0001] The present application relates to the technical field of furniture equipment, and in particular to an electric lifting work table. Background Art

[0002] The lifting table is also called a study table or a lifting office desk. It uses the lifting characteristics to meet the healthy office needs of people of different heights to alternate between standing and sitting. Therefore, more and more office workers choose lifting tables to work. The lifting tables in related technologies generally include electric lifting tables and manual lifting tables. The former uses a motor to drive the lifting, while the latter uses a crank to drive the lifting. The lifting table driven by a single motor in the electric lifting table is also called a single-motor electric lifting table. Its structure generally includes a table top, a base, and two lifting columns connecting the table top and the base; the single-motor electric lifting table also includes a driving motor, which is arranged between the two lifting columns, and the driving end of the driving motor is connected to a horizontally arranged transmission rod, and the two ends of the transmission rod are respectively connected to the screw lifting mechanism in the two lifting columns; the driving motor drives the transmission rod to rotate, thereby rotating the screw lifting mechanism in the two lifting columns, so that the two lifting columns can be lifted and lowered. For example, in the lifting tables previously applied for by the applicant of this case with publication numbers CN212435466U, CN219125647U, CN213428925U, etc., the driving motor is installed on one of the lifting columns through a motor bracket; the motor bracket is a sheet metal part formed by bending, which has a connecting plate connected to the column and a mounting plate for installing the driving motor, and the connecting plate and the mounting plate are sheet metal parts bent into an L shape. During installation, the driving motor is first connected to the mounting plate of the motor bracket, and then the motor bracket with the driving motor is connected to the top of the lifting column through the connecting plate.

[0003] The electric lifting work table of the above-mentioned related technology has the following defects in actual use and assembly process: First, in order to facilitate the connection between the motor bracket and the upper end of the lifting column, the connecting plate of the motor bracket and the upper end of the lifting column are clearance-matched, that is, the connecting plate of the motor bracket is placed on the top of the lifting column and fixedly connected to the upper end of the lifting column by screws; because there is an assembly gap and assembly error between the connecting plate of the motor bracket and the end face of the top of the lifting column, after the motor bracket is installed, the transmission rod of the driving end of the driving motor on the motor bracket often deviates from the preset position, so that the axis of the transmission rod and the axis of the gearbox input gear of the screw lifting mechanism in the lifting column are not in the same straight line, resulting in eccentric transmission; therefore, when the driving motor drives the transmission rod to rotate to drive the input gear of the gearbox in the lifting column to rotate, the input gear generates radial force, which compresses the gearbox, thereby causing abnormal noise or shaking of the lifting column. Furthermore, factors such as the error of the installation position of the driving motor on the motor bracket, the assembly error of the transmission rod, and the assembly accuracy of the input gear of the gearbox can all lead to eccentric transmission of the transmission rod, causing abnormal noise or shaking of the lifting column. Utility Model Content

[0004] The technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide an electric lifting work table that can alleviate the abnormal noise or shaking of the lifting column caused by the assembly error of the motor bracket and the difference in the matching accuracy of the transmission rod.

[0005] The technical solution of the present application is to provide an electric lifting work table having the following structure:

[0006] A work table body, the work table body comprising a lifting column, wherein a linear drive mechanism is connected to the lifting column;

[0007] A driving assembly, which includes a base, a driving motor connected to the base, and a driving rod drivingly connected to the driving motor, and both ends of the driving rod are respectively drivingly connected to the linear driving mechanism in the lifting column;

[0008] The motor bracket is connected to the work table body, and the base is floatingly connected to the motor bracket to alleviate or eliminate the assembly error between the transmission rod and the gear box in the lifting column when the drive assembly is installed.

[0009] In some embodiments, the motor bracket is provided with a receiving groove, a connecting block is provided in the receiving groove, and a movable gap is provided between the connecting block and the inner wall of the receiving groove; a connecting rod is connected to the base, and the connecting rod is connected to the connecting block, so that the driving component has movable space within the space defined by the receiving groove.

[0010] In some embodiments, a cushion block made of a soft elastic material is sleeved on the connecting rod, one end of the cushion block abuts against the workbench body or the connecting block, and the other end of the cushion block abuts against the base.

[0011] In some embodiments, the motor bracket includes a connecting portion and a mounting portion integrally formed with the connecting portion, and the receiving groove is provided on the mounting portion; the connecting portion of the motor bracket is connected to the lifting column, or the connecting portion of the motor bracket is connected to the table board, or the connecting portion of the motor bracket is connected to the cross beam of the electric lifting workbench.

[0012] In some embodiments, the motor bracket is disposed inside the lifting column, and the connecting portion of the motor bracket is connected to the top of the gearbox inside the lifting column, and the mounting portion extends longitudinally downward along the lifting column.

[0013] In some embodiments, the mounting portion includes two mounting plates respectively disposed on both sides of the transmission rod, and the receiving grooves are provided on both of the mounting plates, and the connecting blocks are respectively disposed in the two receiving grooves; two connecting rods are connected to the base, and the two connecting rods respectively pass through the lifting column and are respectively connected to the two connecting blocks.

[0014] In some embodiments, the receiving groove is provided at the free end of the mounting plate, and the thickness dimension of the mounting plate gradually decreases in the direction close to the connecting portion.

[0015] In some embodiments, the receiving groove is a receiving groove with a square cross section, and the connecting block is square and matches the shape of the receiving groove.

[0016] In some embodiments, the lifting column is provided with a through hole for the connecting rod to pass through, and the aperture dimension of the through hole is smaller than the contour dimension of the connecting block, so as to limit the connecting block from disengaging from the receiving groove.

[0017] In some embodiments, the connecting portion is provided with a positioning block extending longitudinally along the lifting column and fittingly inserted into the positioning groove at the top of the gearbox inside the lifting column.

[0018] In summary, compared with the related art, an electric lifting worktable of the present application has the following advantages: The electric lifting worktable makes the base of the driving assembly be floatingly connected to the motor bracket, so that the driving assembly is in a suspended or floating state relative to the motor bracket, that is, the driving assembly can float or move up and down, left and right, or at multiple different angles relative to the motor bracket to relieve or eliminate the assembly error between the transmission rod and the gearbox in the lifting column during the installation of the driving assembly; Therefore, even if there is an assembly error due to the assembly gap or clearance fit between the motor bracket and the worktable body, or due to the assembly error between the transmission rod and the gearbox in the lifting column during the installation of the driving assembly, resulting in the transmission eccentricity of the transmission rod and the transmission rod being subjected to a radial force during rotation; However, the transmission rod can adaptively adjust its position relative to the worktable body during rotation, such as the driving assembly together with the transmission rod can adjust its position up and down, left and right, or at multiple different angles relative to the motor bracket; Therefore, when the driving motor drives the transmission rod to rotate, the radial force received by the transmission rod due to transmission eccentricity forces the driving assembly to move accordingly or adaptively, achieving the effect of continuously adjusting and correcting the transmission center of the transmission rod, thereby relieving or partially offsetting the radial force received by the input gear of the linear drive mechanism in the lifting column, making the transmission smoother, and thus reducing or alleviating the noise and vibration during the transmission of the lifting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an electric lifting worktable according to some embodiments of the present application.

[0020] Figure 2 is a schematic diagram of the bottom structure of an electric lifting worktable according to some embodiments of the present application.

[0021] Figure 3 is a schematic diagram of the installation structure of the driving assembly of an electric lifting worktable according to some embodiments of the present application.

[0022] Figure 4 is a schematic cross-sectional view of the motor bracket of an electric lifting worktable according to some embodiments of the present application.

[0023] Figure 5 is a schematic diagram of the installation of the driving assembly of an electric lifting worktable according to some embodiments of the present application.

[0024] Figure 6 is a schematic diagram of the assembly of the driving assembly of an electric lifting worktable according to some embodiments of the present application.

[0025] Figure 7 is a schematic diagram of the structure of the motor bracket of an electric lifting worktable according to some embodiments of the present application.

[0026] Description of the Reference Numerals:

[0027] 1. Workbench body, 100. Table board, 101. Cross beam, 2. Lifting column, 200. Linear drive mechanism, 201. Gear box, 3. Base, 4. Drive assembly, 400. Base, 401. Drive motor, 402. Transmission rod, 403. Connecting hole, 5. Motor bracket, 500. Connecting part, 501. Mounting part, 502. Mounting plate, 503. Accommodating groove, 504. Positioning block, 6. Connecting block, 7. Connecting rod, 8. Spacer block. Detailed implementation manners

[0028] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the embodiments of this application, and are not intended to limit the protection scope of the embodiments of this application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0029] In the description of the embodiments of this application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific situations.

[0030] In the embodiments of this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0031] The following further elaborates on this application in detail with reference to the drawings and specific embodiments.

[0032] See Figures 1 to 7As shown in the figure, an embodiment of the present application discloses an electric lifting worktable, that is, an electric lifting worktable with a single motor. Its structure includes a worktable body 1, a driving assembly 4, and a motor bracket 5. The worktable body 1 includes a tabletop 100, a base 3, and a lifting column 2 connecting the tabletop 100 and the base 3 and used to adjust the height of the tabletop 100 relative to the base 3. The upper ends of the lifting columns 2 are connected by a cross beam 101, and a linear driving mechanism 200 is connected inside each lifting column 2; this linear driving mechanism 200 is also called a ball screw nut pair, a linear transmission assembly, etc. The upper end of the linear driving mechanism 200 is drivingly connected to a gearbox 201, and the gearbox 201 has a power input end, that is, an input gear, and there is a socket in the center of the input gear for inserting a transmission rod 402.

[0033] See Figure 3 、 Figure 5 and Figure 6 As shown in the figure, the driving assembly 4 includes a base 400, a driving motor 401 connected to the base 400, and a transmission rod 402 drivingly connected to the driving motor 401. The two ends of the transmission rod 402 are respectively inserted into the gearbox 201 of the lifting column 2 and inserted and transmitted with the socket of the input gear, so as to realize the driving connection between the transmission rod 402 and the linear driving mechanism 200 inside the lifting column 2; the axis of the driving motor 401 is horizontally arranged, and the driving motor 401 is located on the side of the tabletop 100 away from the user; such a setting can save the use space under the tabletop 100; the motor bracket 5 is connected to the worktable body 1, and the driving assembly 4 is installed on the motor bracket 5. The driving motor 401 drives the transmission rod 402 to rotate, thereby driving the lifting column 2 to lift. In the embodiment of the present application, both the worktable body 1 and the driving assembly 4 are components of an electric lifting worktable in the prior art, and the present application is an improvement based on this. Therefore, the specific structures of the worktable body 1 and the driving assembly 4 of the electric lifting worktable are not described in detail in this embodiment.

[0034] A motor bracket 5 is connected to the worktable body 1, and the driving assembly 4 is connected to the motor bracket 5. It is not difficult to understand that during the installation of the driving assembly, there will inevitably be an assembly error between the transmission rod and the gearbox inside the lifting column, and there will also be an assembly error between the motor bracket and the worktable body due to the assembly clearance or clearance fit, which will cause the transmission eccentricity of the transmission rod and the transmission rod to be subjected to a radial force when rotating. Therefore, in this embodiment, the base 400 of the driving assembly 4 is floatingly connected to the motor bracket 5 to relieve or eliminate the assembly error between the transmission rod 402 and the gearbox 201 inside the lifting column 2 during the installation of the driving assembly 4.

[0035] Further, the base 400 of the drive assembly 4 is floatingly connected to the motor support 5, which means that there is a clearance between the base 400 and the motor support 5, that is, the base 400 can float or move up and down, left and right, or at multiple different angles relative to the motor support 5. The drive assembly 4 is in a suspended or floating state relative to the motor support 5 and can float or move up and down, left and right, or at multiple different angles relative to the motor support 5. In this way, the transmission rod 402 can adaptively adjust its position during rotation relative to the workbench body 1. For example, the drive assembly 4 together with the transmission rod 402 can adjust its position up and down, left and right, or at multiple different angles relative to the motor support 5. Therefore, when the drive motor 401 drives the transmission rod 402 to rotate, the radial force received by the transmission rod 402 due to transmission eccentricity forces the drive assembly 4 to move accordingly or adaptively, achieving the effect of continuously adjusting and correcting the transmission center of the transmission rod 402, thereby alleviating or partially offsetting the radial force received by the input gear of the linear drive mechanism in the lifting column 2, making the transmission smoother, and thus reducing or alleviating the noise and vibration during the transmission of the lifting column 2.

[0036] Further in this embodiment, referring to Figure 4 、 Figure 5 and Figure 6 As shown, a receiving groove 503 is provided on the motor support 5. A connecting block 6 is arranged in the receiving groove 503, and there is a clearance between the connecting block 6 and the inner wall of the receiving groove 503, that is, the connecting block 6 can move in the up, down, left, and right directions respectively in the receiving groove 503. A connecting rod 7 is connected to the base 400, and the connecting rod 7 is connected to the connecting block 6, which is used to make the drive assembly 4 have a movement space within the space defined by the receiving groove 503, that is, to make the drive assembly 4 in a suspended or floating connection state relative to the motor support 5, so as to alleviate or eliminate the assembly error between the transmission rod 402 and the gearbox 201 in the lifting column 2 during installation.

[0037] In other embodiments, the base 400 of the drive assembly 4 can also be floatingly connected to the motor support 5 through other floating connection structures. For example, a receiving cavity with a spherical inner wall is provided on the motor support, and a connecting rod is connected to the base, and a ball head is arranged at the free end of the connecting rod. The ball head is in clearance fit in the receiving cavity on the motor support. In addition to being able to rotate in all directions in the receiving cavity, the ball head can move up and down, left and right relative to the inner wall of the receiving cavity. Another example is to install a floating connector between the base 400 of the drive assembly 4 and the motor support 5 to achieve the floating connection of the base 400 relative to the motor support 5.

[0038] The motor bracket 5 includes a connecting portion 500 and a mounting portion 501 integrally formed with the connecting portion 500; the motor bracket 5 is an injection-molded motor bracket 5. When connecting to the workbench body 1, the connecting portion 500 of the motor bracket 5 can be connected to the lifting column 2, or the connecting portion 500 of the motor bracket 5 can be connected to the tabletop, or the connecting portion 500 of the motor bracket 5 can be connected to the cross beam of the electric lifting workbench, etc. Specifically, it can be installed according to actual needs.

[0039] Specifically in this embodiment, referring to Figure 6 and Figure 7 As shown, the motor bracket 5 is connected inside the lifting column 2. The connecting portion 500 and the mounting portion 501 are integrally arranged in an L shape. The connecting portion 500 is horizontally arranged and the mounting portion 501 extends longitudinally along the lifting column 2; the connecting portion 500 is connected to the top of the gearbox 201 inside the lifting column 2 by bolts, and a positioning block 504 extending longitudinally along the lifting column 2 and matingly inserted into the positioning groove at the top of the gearbox 201 inside the lifting column 2 is provided on the connecting portion 500. This facilitates the installation of the motor bracket 5 and can effectively prevent the lateral offset of the motor bracket 5, making the connection stability of the motor bracket 5 good.

[0040] Furthermore, since the motor bracket 5 is connected inside the lifting column 2, the connecting rod 7 on the base 400 passes through the lifting column 2 and is connected to the connecting block 6 in the receiving groove 503. In this way, the base 400 can be connected to the lifting column 2, and the driving assembly 4 has a moving space within the space defined by the receiving groove 503. It is not difficult to understand that a through hole for the connecting rod 7 to pass through is provided on the lifting column 2, and the aperture size of the through hole is smaller than the contour size of the connecting block 6, which is used to limit the connecting block 6 from disengaging from the receiving groove 503. And there is a moving gap between the inner wall of the through hole and the connecting rod 7, which is used to enable the driving assembly 4 and the connecting rod 7 to drive the connecting block 6 to move freely within the space defined by the receiving groove 503. A connecting hole 403 is provided on the base 400 of the driving assembly 4, the connecting rod 7 is connected in the connecting hole 403, and the free end of the connecting rod 7 passes through the through hole on the lifting column 2 from outside to inside and is connected to the connecting block 6 in the receiving groove 503. Preferably, the free end of the connecting rod 7 is set as a threaded rod, and the threaded rod is threadedly connected to the threaded hole on the connecting block 6. Under the blockage of the inner wall of the lifting column 2, the driving assembly 4 is pressed against the outer side wall of the lifting column 2.

[0041] It can be understood that even though the connecting rod 7 is connected to the connecting block 6 to press the base 400 or the driving assembly 4 against the outer side wall of the lifting column 2, during the process of the driving motor 401 of the driving assembly 4 driving the transmission rod 402 to rotate, due to the vibration of the driving motor 401 and the radial force borne by the transmission rod 402, the driving assembly 4 can still drive the connecting rod 7 to move relative to the lifting column 2 or the motor bracket 5 within the space defined by the receiving groove 503.

[0042] There is an active gap between the inner wall of the receiving groove 503 of the motor support 5 of the electric lifting workbench and the connecting block 6, that is, the connecting block 6 can move in all directions of up, down, left and right along the transverse direction of the receiving groove 503 in the receiving groove 503. After the base 400 of the driving assembly 4 is connected to the connecting block 6 through the connecting rod 7, not only can the base 400 be connected to the lifting column 2, but also under the cooperation relationship between the connecting block 6 and the receiving groove 503, the driving assembly 4 together with the connecting rod 7 and the connecting block 6 has an active space within the space defined by the receiving groove 503, that is, the driving assembly 4 is in a suspended or floating connection state relative to the motor support 5.

[0043] In this embodiment, the active space defined by the receiving groove 503, that is, the active space between the connecting block 6 and the inner wall of the receiving groove 503; of course, this active space may also be affected by the gap between the through hole on the lifting column 2 and the connecting rod 7, but it does not affect the driving assembly 4 floating or moving relative to the motor support 5 in the up and down or left and right or other angular directions.

[0044] In some embodiments, referring to Figure 6 as shown, the mounting portion 501 includes two vertically arranged mounting plates 502 respectively provided on both sides of the transmission rod 402, and receiving grooves 503 are provided on both mounting plates 502, and connecting blocks 6 are respectively arranged in the two receiving grooves 503; two connecting rods 7 are connected to the base 400, and the two connecting rods 7 respectively pass through the lifting column 2 and are respectively connected to the two connecting blocks 6. Such a setting makes the installation of the driving assembly 4 more stable. In other embodiments, the number of the receiving grooves 503 may also be three, or four, etc., and the number of the corresponding connecting blocks 6 and connecting rods 7 can also be adapted accordingly.

[0045] In this embodiment, the receiving groove 503 is square, and the connecting block 6 in the receiving groove 503 is also square and adapted thereto. In this way, when installing the connecting rod 7, the connecting rod 7 can be easily tightened without fixing the connecting block 6, which is convenient for the user to assemble the driving assembly 4 on the outside. In other embodiments, the shape of the receiving groove 503 and the shape of the connecting block 6 can also be other shapes, such as circular, oval, polygonal, etc.

[0046] In some embodiments, the receiving groove 503 is provided at the free end of the mounting plate 502, and the thickness dimension of the mounting plate 502 gradually decreases along the direction close to the connecting portion 500. Such a setting makes the mounting plate 502 have better elastic ability, relieves the pressure on the connecting block 6, and avoids fracture due to excessive force.

[0047] Further in this embodiment, referring to Figure 5 and Figure 6As shown, the motor bracket 5 is arranged inside the lifting column 2. A cushion block 8 made of a soft elastic material is sleeved on the connecting rod 7. One end of the cushion block 8 abuts against the lifting column 2, and the other end of the cushion block 8 abuts against the base 400. The cushion block 8 is generally a soft rubber cushion block 8, which can not only ensure the connection stability between the base 400 and the lifting column 2, but also enable the driving assembly 4 or the base 400 to have an elastic gap for axial movement along the transmission shaft relative to the lifting column 2, so as to better realize the up-and-down, left-and-right or other angular direction floating or movement of the driving assembly 4 relative to the motor bracket 5 within the movable space defined by the receiving groove 503, thereby achieving the effect of continuously adjusting and correcting the transmission center of the transmission rod 402.

[0048] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms "inside", "outside", etc. indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application.

[0049] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric lifting work table, characterized in that: include A work table body, the work table body comprising a lifting column, wherein a linear drive mechanism is connected to the lifting column; A driving assembly, which includes a base, a driving motor connected to the base, and a driving rod drivingly connected to the driving motor, and both ends of the driving rod are respectively drivingly connected to the linear driving mechanism in the lifting column; The motor bracket is connected to the work table body, and the base is floatingly connected to the motor bracket to alleviate or eliminate the assembly error between the transmission rod and the gear box in the lifting column when the drive assembly is installed.

2. The electric lifting work table according to claim 1, characterized in that: The motor bracket is provided with a receiving groove, a connecting block is provided in the receiving groove, and a movable gap is provided between the connecting block and the inner wall of the receiving groove; a connecting rod is connected to the base, and the connecting rod is connected to the connecting block, so that the driving component has movable space within the space defined by the receiving groove.

3. The electric lifting work table according to claim 2, characterized in that: A cushion block made of soft elastic material is sleeved on the connecting rod, one end of the cushion block abuts against the work table body or the connecting block, and the other end of the cushion block abuts against the base.

4. The electric lifting work table according to claim 2, characterized in that: The motor bracket includes a connecting portion and a mounting portion integrally formed with the connecting portion, and the mounting portion is provided with the accommodating groove; the connecting portion of the motor bracket is connected to the lifting column, or the connecting portion of the motor bracket is connected to the table top, or the connecting portion of the motor bracket is connected to the crossbeam of the electric lifting work table.

5. The electric lifting work table according to claim 4, characterized in that: The motor bracket is arranged in the lifting column, and the connecting portion of the motor bracket is connected to the top of the gear box in the lifting column, and the mounting portion is extended downwardly along the longitudinal direction of the lifting column.

6. The electric lifting work table according to claim 5, characterized in that: The mounting portion includes two mounting plates respectively arranged on both sides of the transmission rod, and the two mounting plates are provided with the accommodating grooves, and the two accommodating grooves are respectively provided with the connecting blocks; the base is connected to two connecting rods, and the two connecting rods respectively pass through the lifting columns and are respectively connected to the two connecting blocks.

7. The electric lifting work table according to claim 6, characterized in that: The accommodating groove is arranged at the free end of the mounting plate, and the thickness of the mounting plate gradually decreases along a direction approaching the connecting portion.

8. The electric lifting work table according to claim 2, characterized in that: The receiving groove is a receiving groove with a square cross section, and the connecting block is a square matching the shape of the receiving groove.

9. The electric lifting work table according to claim 5, characterized in that: The lifting column is provided with a through hole for the connecting rod to pass through, and the aperture size of the through hole is smaller than the outline size of the connecting block, so as to limit the connecting block from being separated from the accommodating groove.

10. The electric lifting work table according to claim 5, characterized in that: The connecting part is provided with a positioning block which extends longitudinally along the lifting column and is matched and plugged with the positioning groove on the top of the gear box in the lifting column.

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