CN219712231U - Lifting upright post assembly - Google Patents

Abstract

The utility model discloses a lifting upright post assembly, wherein a transmission rod of the lifting upright post assembly is provided with a first coupling part, and a coupling gear is provided with a second coupling part, wherein the first coupling part is parallel to the axis of the transmission rod. The coupling gear is movable along an axis parallel to the transmission rod by the cooperation of the first coupling portion of the transmission rod and the second coupling portion of the coupling gear. In addition, the coupling gear is provided with a rotary supporting structure for supporting and positioning the transmission rod so as to reduce the deflection degree of the transmission rod during operation, improve the stability during operation and reduce abnormal noise.

Description

Lifting upright post assembly

Technical Field

The present utility model relates to a lifting column assembly, and more particularly to a highly reliable electric lifting column assembly.

Background

The electric lifting column can be suitable for industrial, medical and educational environments, in particular for lifting tables, work stations and the like. Generally, the electric lifting upright post is often loaded with a load, and in the process of up-and-down reciprocating motion, the load often causes the screw rod to deflect due to insufficient restraint force between the screw rod and the gear, so that the gear is damaged, and the reliability of the electric lifting upright post is reduced.

Disclosure of Invention

Therefore, the present utility model provides a highly reliable electric lifting column assembly to solve the above problems.

In order to solve the above problems, the present utility model discloses a lifting column assembly, which comprises a first column assembly, a second column assembly, a lifting rod assembly and a coupling gear, wherein the first column assembly comprises a first housing, the first housing comprises a first bottom housing part and a top housing part, the first housing forms a containing space, the second column assembly comprises a second housing, the second housing comprises a second bottom housing part, the second housing forms a containing space and a containing opening, and the first housing can be contained in the containing space or extend out of the containing space through the containing opening. The lifting rod assembly comprises a first screw rod, a transmission rod and a first nut piece, wherein the first screw rod is fixedly arranged on the top shell part, the transmission rod is provided with a top end and a bottom end opposite to the top end, the bottom end of the transmission rod is rotatably arranged on the second bottom shell part of the second shell, the transmission rod is provided with a first coupling part, the first coupling part is arranged along a direction parallel to the axial direction of the transmission rod, the first nut piece is fixedly connected to the top end of the transmission rod and can rotate along with the transmission rod, and the first nut piece is screwed on the first screw rod. The coupling gear comprises a coupling gear body and a rotary supporting structure, wherein an assembling channel is formed in the coupling gear body and can be used for the transmission rod to pass through. The rotary supporting structure comprises a rotary part, a supporting part and a second coupling part, wherein the rotary part is arranged on the coupling gear body, the supporting part is arranged on the first bottom shell part of the first shell, the rotary part is rotatably arranged on the supporting part, the second coupling part is arranged in the assembly channel, and the second coupling part is coupled with the first coupling part, so that the coupling gear can drive the transmission rod to rotate, and the coupling gear and the transmission rod can move relative to each other along the axial direction.

In summary, the transmission rod of the lifting upright post assembly is provided with the first coupling part, and the coupling gear is provided with the second coupling part, wherein the first coupling part is parallel to the axis of the transmission rod. The coupling gear is movable along an axis parallel to the transmission rod by the cooperation of the first coupling portion of the transmission rod and the second coupling portion of the coupling gear. In addition, the coupling gear is provided with a rotary supporting structure for supporting and positioning the transmission rod so as to reduce the deflection degree of the transmission rod during operation, improve the stability during operation and reduce abnormal noise. The foregoing and other technical aspects, features and advantages of the present utility model will become more apparent from the following detailed description of the embodiments with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view showing the appearance of a lifting column assembly in an extended state according to an embodiment of the present utility model.

FIG. 2 is a schematic diagram of the internal mechanism of the lifting column assembly according to the embodiment of the utility model.

FIG. 3 is a schematic view of the internal mechanism of the lift column assembly according to the embodiment of the present utility model at another view angle.

FIG. 4 is a schematic view of a partial internal mechanism of a lifting column assembly according to an embodiment of the present utility model.

FIG. 5 is a schematic diagram of a first planetary gear set according to an embodiment of the utility model.

FIG. 6 is a schematic representation of a second planetary gear set according to an embodiment of the present utility model.

FIG. 7 is a schematic cross-sectional view of an exemplary lift column assembly in an extended state.

FIG. 8 is a schematic partial cross-sectional view of a lifting column assembly in accordance with an embodiment of the utility model.

FIG. 9 is a schematic cross-sectional view of a lifting column assembly according to an embodiment of the present utility model in a collapsed state.

FIG. 10 is a schematic view of an alternative embodiment of a lifting column assembly according to the present utility model.

FIG. 11 is a schematic view of the internal mechanism of a lifting column assembly according to another embodiment of the utility model.

FIG. 12 is a schematic diagram of a mechanism of an actuation module according to yet another embodiment of the utility model.

FIG. 13 is a schematic view of an actuator module according to another embodiment of the utility model.

Description of the reference numerals

1000: lifting upright post assembly

1: first column assembly

10: first shell body

100: first bottom shell part

101: top shell portion

102: accommodating space

2: second column assembly

20: second shell

200: second bottom shell part

201: accommodating space

202: accommodating opening

3: lifting rod assembly

30: first screw rod

31: transmission rod

310: top end

311: bottom end

312: first coupling part

A: axial direction

313: hollow channel

32: first nut member

33: second nut member

34: first shaft fixing piece

35: second shaft firmware

36: second screw rod

360: accommodating channel

4,4',4": coupling gear

40: coupling gear body

400: assembly channel

41: rotary supporting structure

410: rotation part

411: support part

4110: first part

4112: groove

4113: second part

412: second coupling part

5: outer casing

50: positioning part

6,6',6": actuation module

60: actuation unit

61: reduction gear set

610: first planetary gear set

6100: gear box

6101: gear ring

6102: first sun gear

6103: first planetary gear

611: second planetary gear set

6110: rotating member

6111: body

S1: first surface

S2: a second surface

6112: first shaft member

6113: second sun gear

6114: second planetary gear

62,62': transmission gear

620: transmission gear body

621: second shaft member

63: worm member

64: transmission gear member

640: worm wheel part

641: connecting part

642: worm part

7: third column assembly

70: third shell

700: third bottom shell part

701: accommodation space

702: accommodating opening

R1: first steering

R2: second steering

Detailed Description

The following description sets forth the preferred embodiments of the utility model and, together with the drawings, provides further details of the utility model and its intended advantages, as will be apparent to those skilled in the art. It should be noted that the drawings are simplified schematic diagrams, and thus only show elements and combinations related to the present utility model, so as to provide a clearer description of the basic architecture or implementation of the present utility model, and actual elements and arrangements may be more complex. In addition, for convenience of explanation, the components shown in the drawings of the present utility model are not drawn in the same scale as the number, shape, size, etc. of actual implementations, and the detailed proportion thereof may be adjusted according to the design requirements.

The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the attached drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the utility model.

Although the terms first, second, third … may be used to describe various elements, the elements are not limited in this regard. This term is used merely to distinguish one element from another element within the specification. The same term may not be used in the claims but instead the first, second, third … are substituted for the order in which the elements in the claims were recited. Thus, in the following description, a first element may be a second element in the claims.

Referring to fig. 1, fig. 2, fig. 3, fig. 7 to fig. 9, fig. 1 is a schematic view showing an external appearance of a lifting column assembly 1000 in an extended state according to an embodiment of the present utility model, fig. 2 is a schematic view showing an internal mechanism of the lifting column assembly 1000 according to an embodiment of the present utility model, fig. 3 is a schematic view showing an internal mechanism of the lifting column assembly 1000 in another view angle according to an embodiment of the present utility model, fig. 7 is a schematic view showing a section of the lifting column assembly 1000 in an extended state according to an embodiment of the present utility model, fig. 8 is a schematic view showing a partial section of the lifting column assembly 1000 according to an embodiment of the present utility model, and fig. 9 is a schematic view showing a section of the lifting column assembly 1000 in a collapsed state according to an embodiment of the present utility model.

The lifting column assembly 1000 comprises a first column assembly 1, a second column assembly 2 and a third column assembly 7. The first column assembly 1 comprises a first housing 10, the first housing 10 having a first bottom portion 100 and a top portion 101, the first bottom portion 100 and forming a receiving space 102. The second pillar assembly 2 comprises a second housing 20, the second housing 20 has a second bottom portion 200, the second housing 20 is formed with a receiving space 201 and a receiving opening 202, and the first housing 10 can be received in the receiving space 201 or extend out of the receiving space 201 through the receiving opening 202. The third pillar assembly 7 comprises a third housing 70, the third housing 70 has a third bottom housing portion 700 and is formed with a housing space 701 and a housing opening 702, and the second housing 20 can be accommodated in the housing space 701 or extend out of the housing space 701 through the housing opening 702.

When the first housing 10 of the first column assembly 1 is accommodated in the second housing 20 of the second column assembly 2 and the second housing 20 of the second column assembly 2 is accommodated in the third housing 70 of the third column assembly 7, the lifting column assembly 1000 is in the retracted state as shown in fig. 9; when the first housing 10 of the first column assembly 1 extends out of the second housing 20 of the second column assembly 2 and the second housing 20 of the second column assembly 2 extends out of the third housing 70 of the third column assembly 7, the lifting column assembly 1000 is in the extended state as shown in fig. 1 and 7.

Further, the lift column assembly 1000 further comprises a lift rod assembly 3, wherein the lift rod assembly 3 comprises a first screw 30, a driving rod 31, a first nut member 32, a second screw 36 and a second nut member 33. The first screw 30 is fixedly provided to the top shell portion 101 of the first housing 10. The transmission rod 31 has a top end 310 and a bottom end 311 opposite to the top end 310, the bottom end 311 of the transmission rod 31 is rotatably disposed on the second bottom shell portion 200 of the second housing 20, the transmission rod 31 has a first coupling portion 312, and the first coupling portion 312 is disposed along a direction parallel to an axial direction a of the transmission rod 31. The first nut member 32 is fixedly connected to the top end 310 of the transmission rod 31 and can rotate along with the transmission rod 31, and the first nut member 32 is screwed to the first screw 30. The second screw rod 36 is fixedly arranged on the third bottom shell 700 of the third shell 70, the second nut member 33 is fixedly arranged at the bottom end 311 of the transmission rod 31, so that the second nut member 33 can rotate along with the transmission rod 31, and the second nut member 33 is screwed on the second screw rod 36. The transmission rod 31 is formed with a hollow channel 313 for accommodating the first screw 30 and the second screw 36, so that the first screw 30 and the second screw 36 can be arranged in a telescopic manner relative to the transmission rod 31, i.e. the first screw 30 and the second screw 36 can extend out of the transmission rod 31 or retract into the transmission rod 31.

The lifting column assembly 1000 further comprises a coupling gear 4, wherein the coupling gear 4 comprises a coupling gear body 40, a rotation supporting structure 41 and a second coupling portion 412. An assembly channel 400 is formed in the coupling gear body 40, the assembly channel 400 is capable of allowing the transmission rod 31 to pass through, the rotation supporting structure 41 comprises a rotation portion 410 and a supporting portion 411, the rotation portion 410 is disposed on the coupling gear body 40, the supporting portion 411 is disposed on the first bottom shell portion 100 of the first housing 10, and the rotation portion 410 is rotatably disposed on the supporting portion 411. In practice, the rotating portion 410 of the rotating supporting structure 41 may be a flange protruding from the coupling gear body 40, and the supporting portion 411 of the rotating supporting structure 41 is a sleeve, and the sleeve includes a first portion 4110, wherein the first portion 4110 has a groove 4112, and the flange (i.e. the rotating portion 410) is rotatably disposed in the groove 4112, i.e. the coupling gear 4 is rotatable relative to the first bottom shell portion 100 of the first housing 10 by the cooperation of the groove 4112 of the sleeve (i.e. the rotating supporting structure 41) and the flange (i.e. the rotating portion 410) protruding from the coupling gear body 40.

In practice, the rotating portion 410 of the rotating support structure 41 may also be a groove, and the first portion 4110 of the sleeve (i.e. the supporting portion 411 of the rotating support structure 41) may also be a flange, so that the flange (i.e. the supporting portion 411 of the rotating support structure 41) is in rotating engagement with the groove (i.e. the rotating portion 410 of the rotating support structure 41). The sleeve (i.e. the rotation supporting structure 41) further comprises a second portion 4113, wherein the second portion 4113 is fastened to the first bottom portion 100 of the first housing 10, and the second portion 4113 is used for positioning the transmission rod 31. In practice, the second portion 4113 is a flange, a through hole is formed on the flange and protrudes from the first portion 4110, and a through hole is formed on the first bottom portion 100 of the first housing 10. The outer peripheral surface of the flange is clamped and fixed on the hole wall of the through hole, so that the shaft sleeve (namely the rotary supporting structure 41) is fixed on the first bottom shell part 100; the through hole in the second portion 4113 is used for the transmission rod 31 to pass through, and the transmission rod 31 is aligned with the center of the through hole by matching the clearance between the transmission rod 31 and the through hole in the second portion 4113, so that the transmission rod 31 is positioned accurately.

The second coupling portion 412 of the coupling gear 4 is disposed in the assembly channel 400, and the second coupling portion 412 of the coupling gear 4 is coupled to the first coupling portion 312 of the transmission rod 31, so that the coupling gear 4 can drive the transmission rod 31 to rotate. In practice, the second coupling portion 412 of the coupling gear 4 and the first coupling portion 312 of the transmission rod 31 are a key and a key slot, respectively, and by matching the key and the key slot, the coupling gear 4 can drive the transmission rod 31 to rotate, and the coupling gear 4 and the transmission rod 31 can also move relative to each other along the axial direction a of the transmission rod 31.

The lifting column assembly 1000 further comprises a housing 5, the housing 5 is disposed on the first bottom portion 100 of the first housing 10, and the housing 5 is used for protecting the coupling gear body 40 of the coupling gear 4. The housing 5 has a positioning portion 50, in this embodiment, the positioning portion 50 is formed with a through hole, the transmission rod 31 passes through the positioning portion 50 via the through hole, and by matching the transmission rod 31 with the clearance of the through hole on the positioning portion 50 of the housing 5, one constraint of the transmission rod 31 is provided at the positioning portion 50 of the housing 5, and by matching the transmission rod 31 with the clearance of the through hole on the first portion 4110 of the supporting portion 411 of the rotating supporting structure 41, the positioning portion 50 of the housing 5 and the second portion 4113 of the shaft sleeve (i.e. the supporting portion 411 of the rotating supporting structure 41) can together position the transmission rod 31, and further provide two constraints of the transmission rod 31. In this way, the through hole on the first portion 4110 of the supporting portion 411 of the supporting structure 41 and the through hole on the positioning portion 50 of the housing 5 can provide two constraints of the driving rod 31 up and down, so as to reduce the deflection of the driving rod 31 during operation, and then the first coupling portion 312 of the driving rod 31 is matched with the second coupling portion 412 of the coupling gear 4 to position the coupling gear body 40 of the coupling gear 4, so that the deflection of the driving rod 31 during operation reduces the influence of the center distance between the coupling gear 4 and other gears, thereby reducing the damage of gears and further improving the reliability of the lifting upright post assembly 1000.

As shown in fig. 2 to 4 and 7, the lifting column assembly 1000 further includes an actuating module 6, and the actuating module 6 is coupled to the coupling gear 4. In this embodiment, the actuating module 6 includes an actuating unit 60, a reduction gear set 61 and a transmission gear 62, wherein the actuating unit 60 can be a motor for outputting a torque force, and the reduction gear set 61 and the transmission gear 62 are used for transmitting the torque force outputted by the actuating unit 60 to the coupling gear 4. Further, the reduction gear set 61 includes a first planetary gear set 610 and a second planetary gear set 611, the first planetary gear set 610 is coupled to the actuating unit 60, the second planetary gear set 611 is coupled to the first planetary gear set 610, and the second planetary gear set 611 is coupled to the coupling gear body 40 of the coupling gear 4 through the transmission gear 62.

Referring to fig. 2 to 6, fig. 4 is a schematic diagram of a partial internal mechanism of a lifting column assembly 1000 according to an embodiment of the utility model, fig. 5 is a schematic diagram of a first planetary gear set 610 according to an embodiment of the utility model, and fig. 6 is a schematic diagram of a second planetary gear set 611 according to an embodiment of the utility model. The first planetary gear set 610 includes a gear case 6100, a first sun gear 6102, and a plurality of first planet gears 6103, wherein the gear case 6100 has a gear ring 6101, and the gear ring 6101 is configured to engage the plurality of first planet gears 6103. The first sun gear 6102 is configured to transmit the torque output by the actuating unit 60, and a plurality of first planet gears 6103 are disposed between the gear ring 6101 of the gear case 6100 and the first sun gear 6102, where each first planet gear 6103 is engaged with the gear ring 6101 of the gear case 6100 and the first sun gear 6102. Therefore, when the torque force is output from the actuating unit 60, the first sun gear 6102 drives the plurality of first planet gears 6103, and each of the first planet gears 6103 rotates around the first sun gear 6102 through the ring gear 6101 of the gear case 6100 and the first sun gear 6102.

The second planetary gear set 611 includes a rotating member 6110, a second sun gear 6113 and a plurality of second planetary gears 6114, the rotating member 6110 includes a body 6111 and a plurality of first shaft members 6112, the body 6111 has a first surface S1 and a second surface S2 opposite to the first surface S1, the plurality of first shaft members 6112 are disposed on the first surface S1 of the body 6111, and each first planetary gear 6103 is rotatably sleeved on one of the plurality of first shaft members 6112. Therefore, when each first planet gear 6103 rotates around the first sun gear 6102, the first planet gears 6103 rotate the rotating member 6110 through the first shaft 6112. The second sun gear 6113 is disposed on the second surface S2 of the body 6111 of the rotator 6110. Therefore, when the rotating member 6110 rotates, the second sun gear 6113 can rotate along with the body 6111 of the rotating member 6110. Each second planetary gear 6114 is meshed with a second sun gear 6113 of the rotating member 6110.

The transmission gear 62 includes a transmission gear body 620 and a plurality of second shaft members 621, the transmission gear body 620 is meshed with the coupling gear body 40 of the coupling gear 4, the plurality of second shaft members 621 are disposed on the transmission gear body 620, and each of the second planetary gears 6114 is rotatably sleeved on one of the plurality of second shaft members 621. Therefore, when the second sun gear 6113 rotates with the body 6111 of the rotating member 6110, each second planetary gear 6114 rotates around the second sun gear 6113 through the second sun gear 6113 and the second shaft member 621, and at the same time, each second planetary gear 6114 drives the transmission gear body 620 of the transmission gear 62 to rotate through the second shaft member 621. Further, when the transmission gear body 620 rotates, the transmission gear body 620 drives the coupling gear body 40 of the coupling gear 4 to rotate; when the coupling gear body 40 rotates, the coupling gear body 40 drives the transmission rod 31 to rotate around the axial direction a of the transmission rod 31 through the second coupling portion 412 of the coupling gear 4 and the first coupling portion 312 of the transmission rod 31.

As described above, referring to fig. 6, 7 and 9, when the coupling gear 4 is driven by the driving gear 62 to rotate along a first direction R1 as shown in fig. 6, the coupling gear 4 drives the driving rod 31 to rotate along the first direction R1, so that the first nut member 32 and the second nut member 33 are respectively screwed with the first screw 30 and the second screw 36 along the first direction R1. Thus, the first screw 30 and the second screw 36 respectively extend out of opposite ends of the hollow channel 313 of the driving rod 31 (as shown in fig. 7). It should be noted that the thread direction of the first nut member 32 of the present utility model is opposite to the thread direction of the second nut member 33. Therefore, when the first nut member 32 and the second nut member 33 are screwed with the first screw 30 and the second screw 36 in the first direction R1, respectively, the first nut member 32 and the second nut member 33 protrude in opposite directions with respect to the hollow passage 313 of the transmission rod 31.

Similarly, when the coupling gear rotates along the second direction, when the coupling gear 4 is driven by the driving gear 62 to rotate along a second direction R2 opposite to the first direction R1 as shown in fig. 6, the coupling gear 4 drives the driving rod 31 to rotate along the second direction R2, so that the first nut member 32 and the second nut member 33 are respectively screwed with the first screw 30 and the second screw 36 along the second direction R2. Thus, the first screw 30 and the second screw 36 can be retracted into the hollow channel 313 from opposite ends of the driving rod 31 (as shown in fig. 9).

In this embodiment, a receiving channel 360 is formed in the second screw 36, and the receiving channel 360 is configured to receive at least a portion of the first screw 30. Therefore, when the first screw 30, the second screw 36 and the transmission rod 31 are in the state as shown in fig. 9, the second screw 36 is accommodated in the hollow channel 313 of the transmission rod 31, and the first screw 30 is accommodated in the accommodating channel 360 of the second screw 36.

In this embodiment, the lifting column assembly 1000 further includes a first shaft member 34 and a second shaft member 35, wherein the first shaft member 34 is fixed to the top portion 101 of the first housing 10, and one end of the first screw 30 is fixed to the top portion 101 of the first housing 10 through the first shaft member 34; the second shaft fixing member 35 is fixed to the third bottom casing portion 700 of the third casing 70, and one end of the second screw 36 is fixed to the third bottom casing portion 700 of the third casing 70 via the second shaft fixing member 35.

Referring to fig. 10 and 11, fig. 10 is a schematic view of an external appearance of a lifting column assembly 1000 'according to another embodiment of the utility model, and fig. 11 is a schematic view of an internal mechanism of the lifting column assembly 1000' according to another embodiment of the utility model. The main difference between the lifting column assembly 1000' and the lifting column assembly 1000 described above is that the lifting column assembly 1000' is a two-section lifting column, i.e. the lifting column assembly 1000' only comprises the first column assembly 1 and the second column assembly 2, and no third column assembly is provided. The elements of this embodiment and the above embodiments with the same reference numerals have the same structural design and function principle, and are not described herein for brevity.

It should be noted that the reduction gear set 61 in the embodiment of the present utility model and the other embodiment is driven by a planetary gear, and the present utility model is not limited thereto. For example, please refer to fig. 12, fig. 12 is a schematic diagram illustrating a mechanism of an actuating module 6' according to another embodiment of the present utility model. The actuating module 6' includes an actuating unit 60, a worm 63 and a transmission gear member 64, wherein the actuating unit 60 can be a motor, and the worm 63 is used for outputting the torque generated by the motor to the transmission gear member 64. In addition, the transmission gear member 64 includes a worm gear portion 640, a connection portion 641, and a worm portion 642, the worm gear portion 640 of the transmission gear member 64 is engaged with the worm member 63, and the connection portion 641 connects the worm gear portion 640 and the worm portion 642. In the present embodiment, the coupling gear 4 'is a worm gear, and the worm gear (i.e., the coupling gear 4') is engaged with the worm portion 642 of the transmission gear member 64. In this way, the torque output by the actuating unit 60 can be transmitted to the worm wheel (i.e. the coupling gear 4') through the worm wheel 63 and the transmission gear 64. In yet another embodiment, please refer to fig. 13, fig. 13 is a schematic diagram illustrating a mechanism of an actuating module 6″ according to another embodiment of the present utility model. The main difference between the actuating module 6 "and the actuating module 6 is that a transmission gear 62 'of the actuating module 6" is a bevel gear, and the coupling gear 4 "is also a bevel gear, i.e. the transmission gear 62' of the actuating module 6" and the coupling gear 4 "are transmitted in a bevel gear manner.

Compared with the prior art, the transmission rod of the lifting upright post assembly is provided with the first coupling part, and the coupling gear is provided with the second coupling part, wherein the first coupling part is parallel to the axis of the transmission rod. The coupling gear is movable along an axis parallel to the transmission rod by the cooperation of the first coupling portion of the transmission rod and the second coupling portion of the coupling gear. In addition, the coupling gear is provided with a rotary supporting structure for supporting and positioning the transmission rod so as to reduce the deflection degree of the transmission rod during operation, improve the stability during operation and reduce abnormal noise.

The above description is only of the preferred embodiments of the present utility model, and the equivalent structural changes of the present utility model are intended to be included in the scope of the present utility model.

Claims (10)

1. A lifting column assembly, comprising:

a first mast assembly comprising:

a first shell, having a first bottom shell and a top shell, the first shell forming a receiving space;

a second mast assembly comprising:

the second shell is provided with a second bottom shell part, a containing space and a containing opening are formed in the second shell, and the first shell can be contained in the containing space or extend out of the containing space through the containing opening; a kind of electronic device with high-pressure air-conditioning system

A lifter assembly, comprising:

the first screw rod is fixedly arranged on the top shell part;

the transmission rod is provided with a top end and a bottom end opposite to the top end, the bottom end of the transmission rod is rotatably arranged on the second bottom shell part of the second shell, and the transmission rod is provided with a first coupling part which is arranged along a direction parallel to the axial direction of the transmission rod; a kind of electronic device with high-pressure air-conditioning system

The first nut piece is fixedly connected to the top end of the transmission rod and can rotate along with the transmission rod, and the first nut piece is screwed with the first screw rod; a kind of electronic device with high-pressure air-conditioning system

A coupling gear, comprising:

the coupling gear body is internally provided with an assembling channel which can be used for the transmission rod to pass through; a kind of electronic device with high-pressure air-conditioning system

At least one rotational support structure comprising:

the rotating part is arranged on the coupling gear body; a kind of electronic device with high-pressure air-conditioning system

The supporting part is arranged on the first bottom shell part of the first shell, and the rotating part is rotatably arranged on the supporting part; a kind of electronic device with high-pressure air-conditioning system

The second coupling part is arranged in the assembly channel and is coupled with the first coupling part, so that the coupling gear can drive the transmission rod to rotate, and the coupling gear and the transmission rod can move along the axial direction relative to each other.

2. The lift column assembly of claim 1, wherein the rotating portion of the rotating support structure is a flange, the support portion of the rotating support structure is a bushing, the bushing comprising:

a first part having a groove, the flange being rotatably disposed in the groove; a kind of electronic device with high-pressure air-conditioning system

The second part is clamped and fixed on the first bottom shell part of the first shell and is used for positioning the transmission rod.

3. The lifting column assembly of claim 2, further comprising:

the shell is arranged on the first bottom shell part of the first shell and used for protecting the coupling gear body of the coupling gear, the shell is provided with a positioning part, the transmission rod passes through the positioning part, and the positioning part of the shell and the second part of the shaft sleeve are used for jointly positioning the transmission rod.

4. The lift post assembly of claim 1, wherein the first coupling portion of the drive rod mates with the second coupling portion of the coupling gear to position the coupling gear body of the coupling gear.

5. The lift column assembly of claim 1, wherein the drive rod defines a hollow passage for providing the first screw in a telescoping manner relative to the drive rod, the lift column assembly further comprising:

the actuating module is coupled with the coupling gear and is used for driving the coupling gear to rotate along a first steering direction or a second steering direction opposite to the first steering direction;

when the coupling gear rotates along the first rotation direction, the coupling gear drives the transmission rod to rotate along the first rotation direction, so that the first nut piece is screwed with the first screw rod along the first rotation direction, and the first screw rod extends out of the hollow channel of the transmission rod;

when the coupling gear rotates along the second steering direction, the coupling gear drives the transmission rod to rotate along the second steering direction, so that the first nut piece is screwed with the first screw rod along the second steering direction, and the first screw rod is retracted into the hollow channel of the transmission rod.

6. The lift column assembly of claim 5, wherein the actuation module comprises:

an actuating unit for outputting a torque force; a kind of electronic device with high-pressure air-conditioning system

A reduction gear set for transmitting the torsion force outputted from the actuating unit to the coupling gear, wherein the reduction gear set comprises more than one planetary gear set;

a drive gear comprising:

the transmission gear body is meshed with the coupling gear body of the coupling gear; a kind of electronic device with high-pressure air-conditioning system

The plurality of second shaft pieces are arranged on the transmission gear body, and each planetary gear is rotatably sleeved on one of the plurality of second shaft pieces.

7. The lifting column assembly of claim 1, further comprising:

a third column assembly comprising:

the second shell can be accommodated in the accommodating space or extend out of the accommodating space through the accommodating opening; a kind of electronic device with high-pressure air-conditioning system

Wherein, the lifter assembly further comprises:

the second screw rod is fixedly arranged on the third bottom shell part; a kind of electronic device with high-pressure air-conditioning system

The second nut piece is fixedly arranged at the bottom end of the transmission rod, so that the second nut piece can rotate along with the transmission rod, and the second nut piece is screwed with the second screw rod.

8. The lift column assembly of claim 7, wherein the drive rod defines a hollow passage for providing the first screw and the second screw in a telescoping manner relative to the drive rod, the lift column assembly further comprising:

the actuating module is coupled with the coupling gear and is used for driving the coupling gear to rotate along a first steering direction or a second steering direction opposite to the first steering direction;

wherein the thread direction of the first nut member is opposite to the thread direction of the second nut member;

when the coupling gear rotates along the first rotation direction, the coupling gear drives the transmission rod to rotate along the first rotation direction, so that the first nut piece and the second nut piece are respectively in threaded fit with the first screw rod and the second screw rod along the first rotation direction, and further the first screw rod and the second screw rod respectively extend out of two opposite ends of the hollow channel of the transmission rod;

when the coupling gear rotates along the second steering direction, the coupling gear drives the transmission rod to rotate along the second steering direction, so that the first nut piece and the second nut piece are respectively in threaded fit with the first screw rod and the second screw rod along the second steering direction, and further the first screw rod and the second screw rod are respectively retracted into the hollow channel from the two opposite ends of the transmission rod.

9. The lift column assembly of claim 7, wherein the second screw has a receiving channel formed therein for receiving at least a portion of the first screw.

10. The lift column assembly of claim 7, wherein the lift bar assembly further comprises:

the first shaft fixing piece is fixedly arranged on the top shell part of the first shell, and one end of the first screw rod is fixedly arranged on the top shell part of the first shell through the first shaft fixing piece; a kind of electronic device with high-pressure air-conditioning system

The second shaft fixing piece is fixedly arranged on the third bottom shell part of the third shell, and one end of the second screw rod is fixedly arranged on the third bottom shell part of the third shell through the second shaft fixing piece.