CN220800402U - Novel lifting table - Google Patents

Abstract

The utility model relates to the technical field of office tables, in particular to a novel lifting table, which comprises a table plate, a motor assembly, lifting feet and a first screw rod, wherein the motor assembly is arranged on the table plate; the lifting foot comprises a first sleeve, a second sleeve, a third sleeve, a first sleeve base, a second sleeve base and a third sleeve base which are installed in a sliding nested manner; the electric lifting table is characterized in that a hollow shaft is nested in the first sleeve, one end of the hollow shaft is rotatably arranged on a first sleeve base, the other end of the hollow shaft is connected with an output shaft of a motor assembly, a first screw rod penetrates through the first sleeve base, one end of the first screw rod is rotatably and irremovably arranged on a second sleeve base, the other end of the first screw rod is arranged in the hollow shaft, the first screw rod can slide in the hollow shaft and synchronously rotate along with the hollow shaft, the first screw rod is in threaded connection with the first sleeve base, and the motor assembly can drive the first sleeve to lift relative to the second sleeve so as to enable the table to lift.

Description

Novel lifting table

Technical Field

The utility model relates to the technical field of office tables, in particular to a novel lifting table.

Background

At present, a common desk basically has no height adjusting function, the height requirements on the desk and the chair are different in different age stages or different working conditions, the difference of the heights easily causes the desk to be not matched with a user, the physical development of teenagers is hindered, the needs of learning and working are not met, and the desk is easy to suffer from spinal diseases due to long-time bending of the back and low head.

Although a small number of tables with manually adjustable heights also appear on the market, the manual height adjustment mode has the problems of low lifting speed, time and labor waste and the like.

Disclosure of utility model

The utility model aims to provide a novel lifting table, at least one of the problems provided by the background art is solved, and in order to achieve the purpose of the utility model, the following technical scheme is adopted:

A novel lifting table comprises a table plate, a motor assembly, lifting feet and a first screw rod; the lifting foot comprises a first sleeve, a second sleeve and a third sleeve which are installed in a sliding nested mode, a first sleeve base is arranged on the first sleeve, a second sleeve base is arranged on the second sleeve, a third sleeve base is arranged on the third sleeve, and the top of the first sleeve is fixedly connected with the bottom of the table plate; the novel desk comprises a desk plate, and is characterized in that a hollow shaft is nested in a first sleeve, one end of the hollow shaft is rotatably arranged on a first sleeve base, the other end of the hollow shaft is connected with an output shaft of a motor assembly, a first screw rod penetrates through the first sleeve base, one end of the first screw rod is rotatably and irremovably arranged on a second sleeve base, the other end of the first screw rod is arranged in the hollow shaft, the first screw rod can slide in the hollow shaft and synchronously rotate along with the hollow shaft, the first screw rod is in threaded connection with the first sleeve base, and the motor assembly can drive the hollow shaft to rotate and drive the first screw rod to rotate so as to drive the first sleeve to lift relative to the second sleeve, so that the desk plate lifts.

The lifting table is characterized in that a first gear assembly and a second gear assembly which are rotatable and can not be separated from the second sleeve base are arranged on the second sleeve base, the first gear assembly is in meshed connection with the second gear assembly, the first screw rod is fixedly connected with the first gear assembly and can drive the first gear assembly to rotate so that the second gear assembly rotates, the lifting table further comprises a second screw rod, the second screw rod penetrates through the second gear assembly and the first sleeve base, one end of the second screw rod is fixedly arranged on the third sleeve base and can not rotate, the other end of the second screw rod is arranged in the first sleeve, the second screw rod is in threaded connection with the second gear assembly, and the second gear assembly is rotatable so that the second sleeve is driven to lift relative to the third sleeve.

The further improvement lies in, the second sleeve base is formed by fixing through the bolt after first installation piece and second installation piece concatenation be provided with the installation position on first installation piece with the second installation piece be used for installing first gear subassembly with second gear subassembly and with first gear subassembly with second gear subassembly carries out spacingly and prevents to break away from the second sleeve base.

The further improvement is that the first gear assembly comprises a first gear, a first bearing and a first mounting tube, wherein the inner ring of the first bearing is sleeved and fixed on the first mounting tube, the first gear is sleeved and fixed on the first mounting tube, and the first screw rod is inserted into a tube hole of the first mounting tube and in interference fit; the second gear assembly comprises a second gear, a second bearing and a second installation tube, the inner ring of the second bearing is sleeved and fixed on the second installation tube, the second gear is sleeved and fixed on the second installation tube, threads are arranged on the inner wall of a tube hole of the second installation tube, a second screw rod penetrates through the second installation tube and is in threaded connection with the second installation tube, and the first gear is meshed and connected with the second gear.

A further improvement is that the first sleeve and the first sleeve base are fixed by a fixing piece; the second sleeve and the second sleeve base are fixed through a fixing piece; the third sleeve and the third sleeve base are fixed through a fixing piece.

The screw rod sleeve is fixedly arranged on the first screw rod, the cross section of the screw rod sleeve is polygonal and matched with the cross section of the hollow shaft, and the screw rod sleeve and the first screw rod can slide in the hollow shaft and synchronously rotate along with the hollow shaft.

The motor assembly is further improved in that the motor assembly further comprises a mounting box, a driving motor, a worm and a worm wheel; the top surface of the mounting box is fixedly connected with the bottom of the table plate, and the top of the lifting foot is fixedly connected with the bottom of the mounting box; the driving motor is transversely and fixedly installed at the inner bottom of the installation box and is electrically connected with the lifting controller, the worm is horizontally placed in the installation box, the output end of the driving motor is connected with one end of the worm to drive the worm to rotate, the other end of the worm is rotatably connected with the supporting wall in the installation box, the worm wheel is rotatably and vertically installed in the installation box and is meshed with the worm to be connected, one end of the output shaft is connected with the worm wheel, and the other end of the output shaft penetrates through a through hole at the bottom of the installation box to enter the lifting foot and is connected with the hollow shaft.

The further improvement is that the bottom of the third sleeve is provided with supporting feet which are mutually perpendicular to the third sleeve.

The motor assembly and the lifting feet are two groups, each group of motor assembly corresponds to one group of lifting feet, and the two groups of lifting feet are arranged on two sides of the bottom of the table plate.

The lifting controller is characterized in that a storage battery is arranged in the lifting controller, and a charging port and a plurality of control keys are arranged on the surface of the lifting controller.

The beneficial effects of the utility model are as follows:

When the output shaft of the motor assembly rotates, the hollow shaft fixedly connected with the output shaft of the motor assembly can be driven to rotate, the first screw rod can be driven to rotate by the rotation of the hollow shaft, and one end of the first screw rod is rotatably and irremovably arranged on the second sleeve base and is in threaded connection with the first sleeve base of the first sleeve, so that the first sleeve can be driven to integrally lift relative to the second sleeve under the action of threads when the first screw rod rotates, and the first screw rod and the screw rod sleeve can slide in the hollow shaft when the first sleeve lifts, so that the first sleeve can lift conveniently.

In addition, the structure of the motor assembly is improved, the mounting box is arranged at the bottom of the desk plate and used for mounting the driving motor, and the driving motor is transversely mounted in the mounting box and then matched with the worm and the worm wheel to drive the output shaft to rotate, so that the motor assembly is more compact in structure and more reasonable in layout.

Drawings

FIG. 1 is a schematic view of the overall appearance of a novel lifting table according to the present utility model;

FIG. 2 is a front view of a lifting foot of the novel lifting table of the present utility model after lifting;

FIG. 3 is a schematic view showing the internal structure of the mounting case in the motor assembly of the present utility model;

FIG. 4 is a schematic diagram of a motor assembly according to the present utility model;

FIG. 5 is a schematic view of the connection between the hollow spindle and the motor assembly of the present utility model;

FIG. 6 is a schematic cross-sectional view of a lifting foot of a novel lifting table according to the present utility model;

FIG. 7 is an enlarged schematic view of the structure A in FIG. 6;

FIG. 8 is an exploded view of the lifting foot of the present utility model;

FIG. 9 is a schematic view of a connection structure between a first sleeve mount and a hollow shaft according to the present utility model;

FIG. 10 is a schematic view of a connection structure between a second sleeve mount and a first wire rod according to the present utility model;

FIG. 11 is a schematic view of a connection structure between a third sleeve mount and a second wire rod according to the present utility model;

FIG. 12 is an exploded view of a second sleeve mount according to the present utility model;

FIG. 13 is a schematic view of a fixing member according to the present utility model;

FIG. 14 is an exploded view of a first lead screw and a screw sleeve according to the present utility model;

Fig. 15 is an enlarged schematic view of the structure at B in fig. 14.

Reference numerals illustrate:

1. A table plate; 2. a motor assembly; 3. a lifting controller; 4. lifting feet; 5. a mounting box; 6. a driving motor; 7. a worm; 8. a worm wheel; 9. an output shaft; 10. a support wall; 11. a shaft sleeve; 12. a first sleeve; 13. a second sleeve; 14. a third sleeve; 15. a hollow shaft; 16. a first screw rod; 17. a screw rod sleeve; 18. a second screw rod; 19. a via hole; 20. a first gear; 21. a first bearing; 22. a first mounting tube; 23. a second gear; 24. a second bearing; 25. a second mounting tube; 26. supporting feet; 27. a fixing member; 28. a cushion pad; 121. a first sleeve mount; 131. a second sleeve mount; 1311. a first mounting block; 1312. a second mounting block; 1313. a mounting position; 141. a third sleeve mount; 171. and (5) a special-shaped hole.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted," "positioned," "secured" or "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as "drivingly connected" to the other element, both may be capable of transmitting power, and the specific implementation may be implemented using the prior art, which is not further described herein. When an element is perpendicular or nearly perpendicular to another element, it is meant that the ideal conditions for both are perpendicular, but certain vertical errors may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" as used herein do not denote a particular quantity or order, but rather are used to distinguish one element from another.

Referring to fig. 1-15, an embodiment of the present utility model provides a novel lifting table, as shown in fig. 1 and 2, including a table board 1, a motor assembly 2 installed at the bottom of the table board 1, a lifting controller 3, lifting feet 4 and a first screw rod 16; the number of the motor assemblies 2 and the lifting feet 4 is two, each motor assembly 2 corresponds to one lifting foot 4, the two lifting feet 4 are arranged on two sides of the lower portion of the table board 1, and the corresponding lifting feet 4 can be lifted under the driving of the output shaft 9 of the motor assembly 2.

The structure of the motor assembly 2 in the present embodiment will be described in detail, specifically, as shown in fig. 3, 4 and 5, the motor assembly 2 includes a mounting box 5, a driving motor 6, a worm 7, a worm wheel 8 and an output shaft 9; the top surface of the installation box 5 is fixedly connected with the bottom of the table plate 1, and the top of the lifting foot 4 is fixedly connected with the bottom of the installation box 5; the driving motor 6 is transversely fixedly installed at the inner bottom of the installation box 5 and is electrically connected with the lifting controller 3, the worm 7 is horizontally placed in the installation box 5, the output end of the driving motor 6 is fixedly connected with one end of the worm 7 and is used for driving the worm 7 to rotate, the other end of the worm 7 is rotatably connected with the supporting wall 10 in the installation box 5, the worm wheel 8 is rotatably and vertically installed in the installation box 5 and is meshed with the worm 7, one end of the output shaft 9 is connected with the worm wheel 8, and the other end of the output shaft 9 penetrates through a through hole at the bottom of the installation box 5 and enters the lifting foot 4 to be used for driving lifting actions of the lifting foot 4.

The working principle of the motor assembly 2 is as follows: when the lifting controller 3 sends a control signal to the driving motor 6, the output end of the driving motor 6 controls the worm 7 to rotate, and the worm 7 is meshed with the worm wheel 8, so that the worm 7 can drive the worm wheel 8 to rotate when rotating, and one end of the output shaft 9 is connected with the worm wheel 8, so that the output shaft 9 can be synchronously driven to rotate when the worm wheel 8 rotates, and the lifting motion of the lifting foot 4 can be driven when the output shaft 9 rotates.

According to the utility model, through improving the structure of the motor assembly 2, the mounting box 5 is arranged at the bottom of the table plate 1 and is used for mounting the driving motor 6, and the driving motor 6 is transversely mounted in the mounting box 5 and is matched with the worm 7 and the worm wheel 8 to drive the output shaft 9 to rotate, so that the motor assembly 2 is more compact in structure and more reasonable in layout.

The structure of the inside of the lifting foot 4 in this embodiment will be described in detail below, as shown in fig. 8, 9, 10 and 11, specifically, the lifting foot 4 includes a first sleeve 12, a second sleeve 13 and a third sleeve 14 that are installed in a sliding nested manner, the first sleeve 12 is slidably nested in the second sleeve 13, the second sleeve 13 is slidably nested in the third sleeve 14, the first sleeve 12, the second sleeve 13 and the third sleeve 14 form a three-stage lifting foot 4, and the top of the first sleeve 12 is fixedly connected with the bottom of the installation box 5.

A first sleeve base 121 is arranged on the first sleeve 12, a second sleeve base 131 is arranged on the second sleeve 13, a third sleeve base 141 is arranged on the third sleeve 14, and the first sleeve 12, the second sleeve 13 and the third sleeve 14 are hollow pipes;

The first sleeve 12 is sleeved on the first sleeve base 121 and fixed by the fixing piece 27, so that the first sleeve 12 and the first sleeve base 121 cannot move relatively; the second sleeve 13 is sleeved on the second sleeve base 131 and fixed by the fixing piece 27, so that the second sleeve 13 and the second sleeve base 131 cannot move relatively; the third sleeve 14 is sleeved on the third sleeve base 141 and fixed, so that the third sleeve 14 and the third sleeve base 141 cannot move relatively.

As shown in fig. 13, the fixing member 27 includes a connecting plate and two fixing nails disposed on the connecting plate, and fixing holes corresponding to the two fixing nails are disposed on the first sleeve base 121 and the first sleeve 12, respectively, and the fixing nails are inserted into the fixing holes, so as to prevent the first sleeve base 121 and the first sleeve 12 from being separated. Similarly, the second sleeve mount 131 and the second sleeve 13 are connected by the same fastener 27.

Preferably, a cushion pad 28 is provided on both the surface of the second sleeve mount 131 and the surface of the third sleeve mount 141.

It will be appreciated that the length and cross-sectional shape of the first sleeve 12, the second sleeve 13 and the third sleeve 14 may be adapted as desired by a person skilled in the art.

Specifically, as shown in fig. 5, 6 and 7, the hollow shaft 15 is nested in the first sleeve 12, one end of the hollow shaft 15 is rotatably mounted on the first sleeve base 121, the other end of the hollow shaft 15 is connected with the output shaft 9 of the motor assembly 2, the first screw 16 is disposed on the first sleeve base 121 in a penetrating manner, one end of the first screw 16 is rotatably and non-detachably mounted on the second sleeve base 131, the other end of the first screw 16 is disposed in the hollow shaft 15, the first screw 16 can slide in the hollow shaft 15 and synchronously rotate along with the hollow shaft 15, the first screw 16 is in threaded connection with the first sleeve base 121, and the motor assembly 2 can drive the hollow shaft 15 to rotate and drive the first screw 16 to rotate so as to drive the first sleeve 12 to lift relative to the second sleeve 13, so that the table 1 lifts.

Specifically, the lifting table further comprises a shaft sleeve 11, the output shaft 9 of the motor assembly 2 is fixedly connected with the shaft sleeve 11 and used for driving the shaft sleeve 11 to synchronously rotate, and the top of the hollow shaft 15 is clamped into the shaft sleeve 11 to synchronously rotate along with the shaft sleeve 11.

As shown in fig. 5, the hollow shaft 15 with a quadrangular cross section is clamped into a corresponding clamping groove in the shaft inlet sleeve 11, so that the shaft sleeve 11 can drive the hollow shaft 15 to synchronously rotate.

In this embodiment, as shown in fig. 6, 7 and 10, a screw sleeve 17 is fixedly mounted on the first screw rod 16, and the screw sleeve 17 and the first screw rod 16 can slide in the hollow shaft 15 and rotate synchronously with the hollow shaft 15. The cross-sectional shape of the screw sleeve 17 matches the cross-sectional shape of the hollow shaft 15.

As shown in fig. 14 and 15, the screw sleeve 17 is provided with a special-shaped hole 171, the top of the first screw 16 is inserted into the special-shaped hole 171, and the shape of the top of the first screw 16 is matched with the shape of the special-shaped hole 171, so that the screw sleeve 17 can drive the first screw 16 to rotate synchronously.

It should be appreciated that the cross-sectional shape of the screw sleeve 17 may be polygonal, such as quadrangular, pentagonal, or other irregular shapes, so long as the screw sleeve 17 is capable of sliding up and down within the hollow shaft 15 and following the hollow shaft 15 in a synchronous rotation, such that the first screw 16 is capable of sliding within the hollow shaft 15 and following the hollow shaft 15 in a synchronous rotation.

The working principle is as follows: when the output shaft 9 of the motor assembly 2 rotates, the shaft sleeve 11 connected with the output shaft 9 of the motor assembly 2 can be driven to rotate, the shaft sleeve 11 rotates to drive the hollow shaft 15 to rotate, the hollow shaft 15 rotates to drive the first screw rod 16 to rotate, one end of the first screw rod 16 is rotatably and irremovably arranged on the second sleeve base 131 and is in threaded connection with the first sleeve base 121 of the first sleeve 12, so that the first sleeve 12 can be driven to integrally lift relative to the second sleeve 13 under the action of threads when the first screw rod 16 rotates, the first screw rod 16 and the screw rod sleeve 17 can slide in the hollow shaft 15 when the first sleeve 12 lifts, the lifting of the first sleeve 12 is facilitated, and the table plate 1 can be driven to lift when the first sleeve 12 lifts.

Specifically, in this embodiment, the second casing base 131 is provided with a first gear assembly and a second gear assembly that are rotatable and not detachable from the second casing base 131, the first gear assembly is meshed with the second gear assembly, the first screw 16 is fixedly connected with the first gear assembly and can drive the first gear assembly to rotate so as to rotate the second gear assembly, the lifting table further includes a second screw 18, the second screw 18 is disposed on the second gear assembly and the first casing base 121 in a penetrating manner, one end of the second screw 18 is fixedly mounted on the third casing base 141 and is not rotatable, the other end of the second screw 18 is disposed in the first casing 12, the second screw 18 is in threaded connection with the second gear assembly, and the second gear assembly is rotatable so as to drive the second casing 13 to lift relative to the third casing 14.

The working principle is as follows: when the output shaft 9 of the motor assembly 2 rotates, the hollow shaft 15 connected with the output shaft 9 of the motor assembly 2 can be driven to rotate, the rotation of the hollow shaft 15 can drive the first screw rod 16 to rotate, the rotation of the first screw rod 16 can drive the first gear assembly to rotate so as to drive the second gear assembly to rotate, and as one end of the second screw rod 18 is fixedly arranged on the third sleeve base 141 and is not rotatable and the second screw rod 18 is in threaded connection with the second gear assembly, the second gear assembly can be lifted along the second screw rod 18 when the second gear assembly rotates, and as the first gear assembly and the second gear assembly are both not detachable from the second sleeve base 131, the second gear assembly can drive the second sleeve 13 to lift relative to the third sleeve 14 when lifting.

In general, when the output shaft 9 of the motor assembly 2 rotates, the first sleeve 12 is driven to lift relative to the second sleeve 13, and meanwhile, the second sleeve 13 is driven to lift relative to the third sleeve 14, so that the lifting speed is high in the structural mode, the efficiency is high, and the structure is stable.

As a preferable solution of this embodiment, as shown in fig. 12, the second sleeve base 131 is formed by splicing a first mounting block 1311 and a second mounting block 1312 and then fixing the first mounting block 1311 and the second mounting block 1312 by bolts, and mounting positions 1313 are provided on the first mounting block 1311 and the second mounting block 1312 for mounting the first gear assembly and the second gear assembly so as to limit the first gear assembly and the second gear assembly and prevent the first gear assembly and the second gear assembly from being separated from the second sleeve base 131, and the shape and the size of the mounting positions 1313 are matched with the shape and the size of the first gear assembly and the second gear assembly.

It will be appreciated that by providing the second sleeve mount 131 formed by bolting after being spliced by the first mounting block 1311 and the second mounting block 1312, assembly of the first gear assembly and the second gear assembly during production can be facilitated.

Specifically, in a preferred aspect of the present embodiment, the first gear assembly includes a first gear 20, a first bearing 21, and a first mounting tube 22, the inner ring of the first bearing 21 is fixed on the first mounting tube 22 in a sleeved mode, the first gear 20 is fixed on the first mounting tube 22 in a sleeved mode, and the first screw 16 is inserted into a tube hole of the first mounting tube 22 and is in interference fit; the second gear assembly comprises a second gear 23, a second bearing 24 and a second mounting tube 25, the inner ring of the second bearing 24 is sleeved and fixed on the second mounting tube 25, the second gear 23 is sleeved and fixed on the second mounting tube 25, threads are arranged on the inner wall of a tube hole of the second mounting tube 25, the second screw rod 18 penetrates through the second mounting tube 25 and is in threaded connection with the second mounting tube 25, and the first gear 20 is in meshed connection with the second gear 23. The outer ring of the first bearing 21 and the outer ring of the second bearing 24 are spliced and fixed by a first mounting block 1311 and a second mounting block 1312.

It will be appreciated that the friction force upon rotation can be reduced by providing the first bearing 21 and the second bearing 24. And the first bearing 21 and the second bearing 24 can form a limiting function in the mounting position 1313, so that the first gear assembly and the second gear assembly are prevented from being separated from the second sleeve base 131, and the second sleeve 13 can be driven to synchronously lift by lifting the second gear assembly up and down.

In this embodiment, the supporting leg 26 is mounted at the bottom of the third sleeve 14, the supporting leg 26 is perpendicular to the third sleeve 14, and the lifting leg 4 can be stably placed on the ground by providing the supporting leg 26.

In this embodiment, a storage battery is disposed inside the lifting controller 3, and a charging port and a plurality of control keys are disposed on the surface of the lifting controller 3.

It is understood that the control keys may include a switch key, a raise key, a lower key, etc.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (10)

1. The novel lifting table is characterized by comprising a table plate, a motor assembly, lifting feet and a first screw rod; the lifting foot comprises a first sleeve, a second sleeve and a third sleeve which are installed in a sliding nested mode, a first sleeve base is arranged on the first sleeve, a second sleeve base is arranged on the second sleeve, a third sleeve base is arranged on the third sleeve, and the top of the first sleeve is fixedly connected with the bottom of the table plate; the novel desk comprises a desk plate, and is characterized in that a hollow shaft is nested in a first sleeve, one end of the hollow shaft is rotatably arranged on a first sleeve base, the other end of the hollow shaft is connected with an output shaft of a motor assembly, a first screw rod penetrates through the first sleeve base, one end of the first screw rod is rotatably and irremovably arranged on a second sleeve base, the other end of the first screw rod is arranged in the hollow shaft, the first screw rod can slide in the hollow shaft and synchronously rotate along with the hollow shaft, the first screw rod is in threaded connection with the first sleeve base, and the motor assembly can drive the hollow shaft to rotate and drive the first screw rod to rotate so as to drive the first sleeve to lift relative to the second sleeve, so that the desk plate lifts.

2. The novel lifting table according to claim 1, wherein the second sleeve base is provided with a first gear assembly and a second gear assembly which are rotatable and can not be separated from the second sleeve base, the first gear assembly is in meshed connection with the second gear assembly, the first screw rod is fixedly connected with the first gear assembly and can drive the first gear assembly to rotate so as to enable the second gear assembly to rotate, the novel lifting table further comprises a second screw rod, the second screw rod is arranged on the second gear assembly and the first sleeve base in a penetrating manner, one end of the second screw rod is fixedly arranged on the third sleeve base and is not rotatable, the other end of the second screw rod is arranged in the first sleeve, the second screw rod is in threaded connection with the second gear assembly, and the second gear assembly is rotatable so as to drive the second sleeve to lift relative to the third sleeve.

3. The novel lifting table according to claim 2, wherein the second sleeve base is formed by fixing a first mounting block and a second mounting block through bolts after being spliced, and mounting positions are arranged on the first mounting block and the second mounting block and used for mounting the first gear assembly and the second gear assembly, limiting the first gear assembly and the second gear assembly and preventing the first gear assembly and the second gear assembly from being separated from the second sleeve base.

4. A novel lifting table according to claim 2 or 3, wherein the first gear assembly comprises a first gear, a first bearing and a first mounting tube, the inner ring of the first bearing is fixedly sleeved on the first mounting tube, the first gear is fixedly sleeved on the first mounting tube, and the first screw rod is inserted into a tube hole of the first mounting tube and in interference fit; the second gear assembly comprises a second gear, a second bearing and a second installation tube, the inner ring of the second bearing is sleeved and fixed on the second installation tube, the second gear is sleeved and fixed on the second installation tube, threads are arranged on the inner wall of a tube hole of the second installation tube, a second screw rod penetrates through the second installation tube and is in threaded connection with the second installation tube, and the first gear is meshed and connected with the second gear.

5. The novel lifting table according to claim 1, wherein the first sleeve and the first sleeve base are fixed by a fixing piece; the second sleeve and the second sleeve base are fixed through a fixing piece; the third sleeve and the third sleeve base are fixed through a fixing piece.

6. The novel lifting table according to claim 1, wherein a screw rod sleeve is fixedly installed on the first screw rod, the cross section shape of the screw rod sleeve is polygonal and matched with the cross section shape of the hollow shaft, and the screw rod sleeve and the first screw rod can slide in the hollow shaft and synchronously rotate along with the hollow shaft.

7. The novel lifting table according to claim 1, wherein the motor assembly further comprises a mounting box, a driving motor, a worm and a worm wheel; the top surface of the mounting box is fixedly connected with the bottom of the table plate, and the top of the lifting foot is fixedly connected with the bottom of the mounting box; the driving motor is transversely and fixedly installed at the inner bottom of the installation box and is electrically connected with the lifting controller, the worm is horizontally placed in the installation box, the output end of the driving motor is connected with one end of the worm to drive the worm to rotate, the other end of the worm is rotatably connected with the supporting wall in the installation box, the worm wheel is rotatably and vertically installed in the installation box and is meshed with the worm to be connected, one end of the output shaft is connected with the worm wheel, and the other end of the output shaft penetrates through a through hole at the bottom of the installation box to enter the lifting foot and is connected with the hollow shaft.

8. The novel lifting table according to claim 1, wherein the bottom of the third sleeve is provided with supporting feet, and the supporting feet are perpendicular to the third sleeve.

9. The novel lifting table according to claim 1, wherein the number of the motor assemblies and the number of the lifting feet are two, each motor assembly corresponds to one lifting foot, and the two lifting feet are arranged on two sides of the bottom of the table plate.

10. The novel lifting table according to claim 7, wherein a storage battery is arranged inside the lifting controller, and a charging port and a plurality of control keys are arranged on the surface of the lifting controller.