CN112555639A

CN112555639A - Lifting assembly

Info

Publication number: CN112555639A
Application number: CN202011415729.7A
Authority: CN
Inventors: 程敏; 高俊杰
Original assignee: Nanjing Tuodao Medical Technology Co Ltd
Current assignee: Tuodao Medical Technology Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-03-26
Anticipated expiration: 2040-12-03
Also published as: CN112555639B

Abstract

The invention discloses a lifting assembly, comprising: a chassis; the air spring is arranged on the chassis through a support telescopic mechanism, and the support telescopic mechanism and the air spring are synchronously telescopic. The support telescopic mechanism comprises an outer sleeve and an inner sleeve arranged in the outer sleeve in a sliding mode, and the inner sleeve is sleeved outside the air spring. The lifting assembly is provided with the unlocking button, the lifting height can be adjusted after unlocking, no noise exists in the lifting process, the smoothness is good, wiring can be conducted internally, circumferential rotation does not exist, the lifting force can be adjusted according to load equipment, and the requirement of human engineering can be met.

Description

Lifting assembly

Technical Field

The invention relates to the field of mechanical structures, in particular to a lifting assembly.

Background

Along with the popularization of orthopaedic surgery robot in the hospital, the relative position of the important component optical tracker of surgical robot for discerning surgical instruments, patient tracer, the terminal base of robot, current optical tracker is supported by the fixed bolster, does not possess the lift and accomodates the function, and optical tracker's high unable adjustment. Therefore, a liftable component needs to be designed to meet the requirements of the optical tracker in different environments.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a lifting assembly aiming at the defects.

The technical scheme is as follows:

a lift assembly, comprising:

a chassis;

the air spring is arranged on the chassis through a support telescopic mechanism, and the support telescopic mechanism and the air spring are synchronously telescopic.

The support telescopic mechanism comprises an outer sleeve and an inner sleeve arranged in the outer sleeve in a sliding mode, and the inner sleeve is sleeved outside the air spring.

The inner side wall of the outer sleeve is axially provided with a sliding groove, the outer side wall of the inner sleeve is provided with a corresponding sliding component, and the inner sleeve and the outer sleeve are installed in a matched mode through the sliding component and the sliding groove.

The adjusting sleeve comprises a hollow adjusting cylinder, and at least one bearing matched with the inner diameter of the outer sleeve is axially arranged on the outer side wall of the adjusting cylinder through a sleeve pin shaft.

The outer side wall of the adjusting cylinder is provided with at least one bearing notch, two side walls of the at least one bearing notch are provided with pin shaft grooves along the transverse direction, and the external member pin shaft is arranged in the pin shaft grooves.

An adjusting sliding groove communicated with the pin shaft groove is formed in the outer end of the adjusting cylinder along the axial direction, and a depth adjusting block is arranged in the adjusting sliding groove; the depth adjusting block comprises an adjusting block and matching feet, wherein the two sides of the adjusting block are respectively matched with the sleeve pin shaft in the pin shaft groove correspondingly; the position of the sleeve pin shaft on the side wall of the adjusting cylinder is adjusted by adjusting the depth of the depth adjusting block in the adjusting sliding groove.

The side surface of the matching foot matched with the sleeve pin shaft is designed into an inward inclined surface.

The depth adjusting block is fixed on the adjusting cylinder through a fixing plate, and a plurality of external member jackscrews which are in contact with the adjusting block of the depth adjusting block and used for adjusting the depth of the sliding groove are arranged on the fixing plate.

The inner side wall of the outer sleeve is axially provided with a sliding groove, the outer side wall of the adjusting cylinder is correspondingly provided with at least one bearing, and the adjusting cylinder slides in the outer sleeve through the bearing.

A hollow adjusting lantern ring is arranged at the upper end of the outer sleeve, and the inner sleeve penetrates through the adjusting lantern ring; and at least one bearing matched with the outer wall of the inner sleeve is arranged on the inner wall of the adjusting sleeve ring along the axial direction through a sleeve ring pin shaft.

The inner wall of the adjusting lantern ring is provided with at least one rolling groove, two side walls of the at least one rolling groove are provided with pin shaft adjusting holes along the transverse direction, and the lantern ring pin shaft is arranged in the pin shaft adjusting holes.

Adjusting holes are formed in the positions, corresponding to the pin shaft adjusting holes, of the outer side wall of the adjusting lantern ring, and lantern ring jackscrews used for adjusting the lantern ring pin shafts are arranged in the adjusting holes.

The unlocking mechanism is characterized by further comprising an unlocking handle, the unlocking handle is matched with an unlocking button at the upper end of the air spring to realize the lifting of the air spring, and meanwhile, the inner sleeve is driven to be synchronously telescopic in the outer sleeve.

The unlocking handle comprises a handle sleeve and a handle shell, the handle sleeve is fixed at the upper end of the inner sleeve, and the handle shell is arranged on the side surface of the handle sleeve and is communicated with the handle sleeve; an unlocking rod is rotatably arranged in the handle shell at the front middle position through an unlocking shaft, the tail end of the unlocking rod extends into the handle sleeve, and the inner side of the tail end of the unlocking rod is matched with an unlocking button at the upper end of the air spring; the handle shell is connected with the unlocking rod through a spring, and an unlocking button is arranged on the inner side of the front end of the unlocking rod.

The handle shell is of a bent structure, and the shape of an unlocking rod in the handle shell corresponds to that of the handle shell; the bending angle of the bending structure is 60-180 degrees.

The handle fixing device is characterized in that a plurality of handle fixing grooves are formed in the outer wall of the upper end of the inner sleeve, handle fixing ribs corresponding to the handle fixing grooves are axially arranged on the inner wall of the handle sleeve, and the handle sleeve and the inner sleeve are fixedly installed through matching of the handle fixing grooves and the handle fixing ribs.

And a stop groove is also arranged at the outer side of the tail end of the unlocking rod, and the motion limitation of the unlocking rod is realized through the matching of the stop groove and the side wall of the handle sleeve.

Be provided with on the terminal surface under the handle sleeve and prevent bumping the piece, prevent bumping the piece and adopt the silica gel material.

The gas spring selects a proper nominal force specification according to the weight of the load bearing object.

Compared with the prior art, the invention has the following beneficial effects:

1. the lifting assembly is provided with an unlocking button, and the lifting height can be adjusted after unlocking;

2. the lifting assembly of the invention does not rotate circumferentially relative to the base;

3. the lifting assembly has no noise and good smoothness in the lifting process, and the lifting force can be adjusted according to load equipment, so that the requirement of human engineering can be met.

Drawings

FIG. 1 is an exemplary diagram of an orthopedic navigation system trolley to which the present invention is applied; wherein, (a) is a state diagram of the trolley lifting upright post which is completely unfolded, and (b) is a state diagram of the trolley lifting upright post which is accommodated.

Fig. 2 is an internal view of the carriage support frame.

FIG. 3 is a structural view of the lifting column of the present invention; wherein, (a) is a schematic diagram of the lifting upright column, and (b) is a sectional diagram of the lifting upright column.

FIG. 4 is a schematic view of a gas spring.

FIG. 5 is a schematic view of an adjustment collar; wherein, (a) is the assembly diagram of the adjusting lantern ring, and (b) is the schematic diagram of the adjusting lantern ring body.

Fig. 6 is a schematic view of an adjustment kit.

Fig. 7 is a schematic view of an adjustment cylinder.

Fig. 8 is a characteristic view of a bearing depth adjusting block.

Figure 9 is a schematic view of the outer sleeve.

Figure 10 is a schematic view of the inner sleeve.

Fig. 11 is a schematic view of an upper end fixture.

FIG. 12 is a schematic view of the release handle; wherein, (a) is the integral view of the unlocking handle, (b) is the section view of the unlocking handle, and (c) is the internal view of the handle shell.

Fig. 13 is an assembly view.

Wherein, 1 is a trolley chassis, 2 is a trolley support frame, 3 is a lifting upright post, 4 is a folding arm component, and 5 is an optical tracker;

21 is a supporting frame, 22 is a gas spring supporting plate, 23 is a gas spring pin shaft, and 24 is a supporting plate;

31 is a gas spring; 311 is a connecting piece, 312 is a connecting thread, 313 is an unlocking button;

32 is an outer sleeve; 321 is a sleeve sliding groove;

33 is an adjusting collar; 331 is a lantern ring body, 332 is a lantern ring jackscrew, 333 is a lantern ring bearing, and 334 is a lantern ring pin shaft; 3311 is pin shaft adjusting hole, 3312 is pin shaft fixing hole;

34 is an inner sleeve; 341 is a handle fixing groove, 342 is an unlocking rod groove, 343 is an upper end fixing piece;

3431 is a wire hole, 3432 is a gas spring fixing hole;

35 is an unlocking handle; 3501 is a folding arm connector, 3502 is a handle case, 3503 is an unlocking button, 3504 is an unlocking lever, 3505 is a spring, and 3506 is an anti-collision member;

3502.1 is a handle fixing rib, 3502.2 is a retaining groove, 3502.3 is a protrusion;

36 is an adjustment kit; 3601 is a fixing plate, 3602 is a depth adjusting block, 3603 is a sliding key, 3604 is a deep groove ball bearing, 3605 is a suite pin shaft, 3606 is a suite bearing, 3607 is a suite jackscrew, and 3608 is an adjusting cylinder;

3602.1 is an adjusting block, 3602.2 is a matching foot;

3608.1 is a regulating slide groove, 3608.2 is a slide side groove, 3608.3 is a pin shaft groove, 3608.4 is a bearing notch, 3608.5 is a wiring hole, 3608.6 is a gas spring through hole.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

Fig. 1 is an illustration showing an example of a trolley for an orthopedic surgery navigation system, in which fig. 1(a) shows a state where a lifting column is completely unfolded and a required height of the lifting column can be adjusted during a surgery, and fig. 1(b) shows a state where the lifting column is stored, and the trolley is mainly used for being transported to a storage room after the surgery is completed, reducing the height and facilitating transportation. As shown in fig. 1, the bone surgery navigation system trolley applied in the invention comprises a trolley chassis 1, a trolley supporting frame 2, a lifting upright post 3, a folding arm assembly 4 and an optical tracker 5, wherein the trolley supporting frame 2 is arranged on the trolley chassis 1, a lifting support column 3 is arranged on the trolley supporting frame 2, and the optical tracker 5 is arranged at the top end of the lifting support column 3 through the folding arm 4.

Fig. 2 is an internal view of the carriage support frame, and as shown in fig. 2, the carriage support frame 2 is fixedly installed on the carriage chassis 1, and includes a support frame 21, a gas spring support plate 22 is fixedly installed on the support frame 21, and a gas spring pin 23 is provided on the gas spring support plate 22 for being hinged with a connecting member 311 of a gas spring 31; a support plate 24 is fixedly arranged on the support frame 21 above the gas spring support plate 22, and is provided with a through hole for penetrating the lifting upright 3 and fixing the lifting upright 3.

Fig. 3 is a structural diagram of the lifting column of the present invention, as shown in fig. 3, the lifting column 3 includes a gas spring 31, an outer sleeve 32, an adjusting collar 33, an inner sleeve 34, an unlocking handle 35 and an adjusting collar 36, as shown in fig. 3(b), the inner sleeve 34 is slidably disposed in the outer sleeve 32, the adjusting collar 36 is disposed at the lower end of the inner sleeve 34, the adjusting collar 33 is disposed at the upper end of the outer sleeve 32, the inner sleeve 34 passes through the adjusting collar 33 and is slidably disposed in the outer sleeve 32 through the adjusting collar 36, and the inner sleeve 34 and the outer sleeve 32 are slidably engaged with each other through the adjusting collar 36 and the adjusting collar 33; the upper end of the inner sleeve 34 is fixedly connected with an unlocking handle 35; the gas spring 31 is arranged in the inner sleeve 34, the upper end of the gas spring 31 and the upper end of the inner sleeve 34 are at the same height, the inner sleeve 34 extends and retracts in the outer sleeve 32, and meanwhile, the gas spring 31 extends and retracts, so that the lifting of the lifting upright post 3 is realized.

FIG. 4 is a schematic view of a gas spring, as shown in FIG. 4, gas spring 31 includes a connecting member 311, a gas spring body, connecting threads 312, and an unlocking button 313; the gas spring body comprises a pressure tank and a piston rod which is telescopically arranged in the pressure tank, the connecting piece 311 is arranged at the lower end of the gas spring body and is provided with a hinge hole, and the connecting piece 311 is hinged with a gas spring pin shaft 23 on a gas spring supporting plate 22 of the supporting frame 21 through the hinge hole; an unlocking button 313 is arranged at the upper end of the gas spring body (namely the upper end of the piston rod), and a connecting thread 312 is also arranged on the outer side wall of the upper end of the gas spring body; the upper end of the gas spring body (i.e., the upper end of the piston rod) is at the same elevation as the upper end of the inner sleeve 34.

The gas spring 31 has various specifications, and in practical application, the gas spring with proper nominal force can be selected according to the weight of a bearing object, so that better human engineering interaction is realized.

Fig. 5 is a schematic view of an adjusting collar, as shown in fig. 5, the adjusting collar 33 includes a collar body 331, at least one rolling groove is axially formed on an inner wall of the collar body 331, a pin shaft adjusting hole 3311 along a transverse direction is correspondingly formed on both side walls of the at least one rolling groove, a collar pin shaft 334 is installed in the pin shaft adjusting hole 3311, a collar bearing 333 is rotatably installed on the collar pin shaft 334, and the collar bearing 333 abuts against an outer side wall of the inner sleeve 34, so that the inner sleeve 34 slides in the adjusting collar 33; the collar pin 334 is movable in a transverse direction within the pin adjustment hole 3311 to adjust the pressure of contact between the collar bearing 333 and the inner sleeve 34, and thus the friction therebetween. An adjusting hole is formed in the position, located at the lantern ring pin shaft 334, of the outer side wall of the lantern ring body 331, a lantern ring jackscrew 332 is arranged in the adjusting hole, the lantern ring pin shaft 334 is adjusted to move in the pin shaft adjusting hole 3311 along the transverse direction through the lantern ring jackscrew 332, and then the contact pressure between the lantern ring bearing 333 and the inner sleeve 34 can be adjusted, so that the friction force between the lantern ring bearing and the inner sleeve is adjusted. The two adjusting holes are respectively arranged at the two sides of the lantern ring bearing 333.

In the invention, pin shaft fixing holes 3312 can be arranged on two side walls of at least one rolling groove, a lantern ring pin shaft 334 is fixedly arranged in the pin shaft fixing holes 3312, a lantern ring bearing 333 is rotatably arranged on the lantern ring pin shaft 334, and the friction force between the lantern ring bearing 333 and the inner sleeve 34 is also not adjustable because the lantern ring pin shaft 334 is not adjustable, thereby ensuring certain sliding property.

Fig. 6 is a schematic diagram of an adjustment kit, and as shown in fig. 6, the adjustment kit 36 includes an upper fixing plate 3601, a depth adjusting block 3602, a sliding key 3603, a deep groove ball bearing 3604, a kit pin 3605, a kit bearing 3606, a kit jackscrew 3607, and an adjustment cylinder 3608.

As shown in fig. 7, the adjusting cylinder 3608 is a hollow cylinder, the hollow portion of which is a gas spring through hole 3608.6 for a gas spring to pass through; a wire hole 3608.5 formed in the side surface of the adjusting cylinder 3608 in the axial direction, a sliding side groove 3608.2 is further formed in the outer side surface of the adjusting cylinder 3608 in the axial direction, a sliding key 3603 is fixed on the sliding side groove 3608.2 through a bolt, and the thickness of the sliding key 3603 is not less than the depth of the sliding side groove 3608.2; a deep groove ball bearing 3604 is fixedly mounted on the sliding key 3603 through a bolt. At least one bearing notch 3608.4 is axially formed on the outer side surface of the adjusting cylinder 3608, a pin groove 3608.3 is formed in at least one bearing notch 3608.4 in the transverse direction, a sleeve pin 3605 is arranged in the pin groove 3608.3, and a sleeve bearing 3606 is rotatably mounted on the sleeve pin 3605.

In the present invention, the sleeve pin 3605 may be fixedly installed in at least one of the bearing slots 3608.4, and since the sleeve pin 3605 is not adjustable, the friction force between the sleeve bearing 3606 installed thereon and the outer sleeve 32 is also not adjustable, thereby ensuring a certain sliding property.

An adjusting sliding groove 3608.1 communicated with the pin shaft groove 3608.3 is axially formed in one end, opposite to the outer side of the inner sleeve 34, of the adjusting cylinder 3608, a depth adjusting block 3602 is arranged in the adjusting sliding groove 3608.1, and as shown in fig. 8, the depth adjusting block 3602 comprises an adjusting block 3602.1 at the upper part and matching feet 3602.2 arranged at two sides below the adjusting block 3602.1; the ends of the two matching feet 3602.2 are respectively matched with the two ends of the sleeve pin 3605, and the side surfaces of the two matching feet which are matched with the sleeve pin 3605 are designed to be inward inclined surfaces. A fixing plate 3601 is fixedly installed at the upper end of an adjusting cylinder 3608 through a bolt, a plurality of adjusting holes are formed in the fixing plate 3601, a sleeve piece jackscrew 3607 is movably arranged in each adjusting hole, the sleeve piece jackscrew 3607 is in contact with an adjusting block 3602.1 of a depth adjusting block 3602, and the depth adjusting block 3602 is driven to move up and down through the up-and-down movement of the sleeve piece jackscrew 3607, so that two matching pins 3602.2 of the depth adjusting block 3602 move up and down, the inclined surface of the inclined surface exerts pressure on a sleeve piece pin shaft 3605 when the inclined surface moves down, the sleeve piece pin shaft 3605 moves outwards along a pin shaft groove 3608.3, a sleeve piece bearing 3606 on the inclined surface moves outwards, and the friction force between the sleeve piece bearing 3606 and an outer cylinder 32 is increased; when the friction force needs to be reduced, the sleeve jackscrew 3607 is adjusted to move upwards, the depth adjusting block 3602 does not have the pressure applied by the sleeve jackscrew 3607, and in the process of matching sliding motion between the inner sleeve 34 and the outer sleeve 32, the outer sleeve 32 applies pressure to the sleeve bearing 3606, so that the sleeve bearing 3606 moves inwards on the side surface of the adjusting cylinder 3608, the matching foot 3602.2 of the depth adjusting block 3602 further moves upwards, and the depth adjusting block 3602 further moves upwards.

FIG. 9 is a schematic view of the outer sleeve, as shown in FIG. 9, with the lower end of the outer sleeve 32 being fixedly flanged to the support plate 24 of the support frame 21; a sleeve sliding groove 321 is axially arranged on the inner side wall of the outer sleeve 32 and is matched with the deep groove ball bearing 3604 on the adjusting cylinder 3608, so that the adjusting cylinder 3608 slides in the outer sleeve 32, the inner sleeve 34 slides in the outer sleeve 32, and the relative rotation of the inner sleeve 34 relative to the outer sleeve 32 is limited; the aforementioned adjustment collar 33 is fixedly mounted at the upper end of the outer sleeve 32 by means of bolts.

FIG. 10 is a schematic view of the inner sleeve, as shown in FIG. 10, with the lower end of the inner sleeve 34 being fixedly connected to the lower end of the adjustment cylinder 3608 of the adjustment assembly 36 by bolts, such that the adjustment cylinder 3608 is mounted upside down on the lower end of the inner sleeve 34; an unlocking rod groove 342 is axially formed in the side wall of the upper end of the inner sleeve 34, and a plurality of handle fixing grooves 341 are axially formed in the outer side wall of the upper end of the inner sleeve; an upper end fixing member 343 is fixedly mounted on the inner side of the upper end of the inner sleeve 34 by a bolt, as shown in fig. 11, the upper end fixing member 343 includes a gas spring fixing hole 3432 opened in the middle and a routing hole 3431 for routing, and the gas spring fixing hole 3432 is in threaded fit with the upper end 312 of the gas spring 31 to fix the gas spring.

In the present invention, both the collar bearing 333 and the sleeve bearing 3606 are polyurethane bearings.

Fig. 12 is a schematic view of the unlocking handle, and as shown in fig. 12, the unlocking handle 35 includes a handle sleeve, a handle housing 3502, an unlocking button 3503, an unlocking lever 3504, and a spring 3505, a handle fixing rib 3502.1 corresponding to a handle fixing groove 341 at the upper end of the inner sleeve 34 is axially arranged on the inner wall of the handle sleeve, the handle sleeve and the inner sleeve 34 are fixedly mounted by the cooperation of the handle fixing groove 341 and the handle fixing rib 3502.1, and a folding arm connector 3501 for being connected with a folding arm in a matching manner is fixedly mounted on the upper end face of the handle sleeve. The handle shell 3502 is arranged on the side of the handle sleeve and is communicated with the handle sleeve, an unlocking shaft is arranged in the handle shell 3502 at the front middle position, an unlocking rod 3504 is rotatably arranged on the unlocking shaft, the tail end of the unlocking rod 3504 extends into the handle sleeve and is arranged in an unlocking rod groove 342 at the upper end of the inner sleeve 34, the inner side of the tail end of the unlocking rod is contacted with an unlocking button 313 at the upper end of the air spring 31, a protrusion 3502.3 is arranged at the position corresponding to the outer side of the front ends of the handle shell 3502 and the unlocking rod 3504, a spring 3505 is arranged on the protrusion 3502.3, the outer side of the front end of the unlocking rod 3504 is connected with the handle shell 3502 through the spring 3505, and the unlocking rod 3504 is pushed inwards under the natural state of the spring 3505, so that the tail end of the unlocking rod 3504 is separated; an unlock button 3503 is attached to the inside of the front end of the unlock lever 3504.

In the present invention, the handle housing 3502 is integrally designed with the handle sleeve.

In the present invention, a stopper groove 3502.2 is further provided at the outer side of the end of the lock release lever 3504, and the movement of the lock release lever 3504 is limited by the cooperation of the stopper groove 3502.2 and the sidewall of the handle sleeve.

In the present invention, the handle housing 3502 may be designed as a bent structure, in which the shape of the lock release lever 3504 corresponds to the shape of the handle housing 3502; the bending angle of the bending structure is 60-180 degrees.

In the present invention, when the unlocking handle 35 moves up and down, in order to prevent the unlocking handle from colliding with the upper end surface of the adjusting collar 33, a collision prevention piece 3506 is provided as a buffer piece on the lower end surface of the handle sleeve, and the collision prevention piece 3506 is made of silica gel.

The working principle of the invention is as follows:

when the lifting of the lifting assembly needs to be adjusted, the unlocking button on the unlocking handle 35 is pressed, and the unlocking button 313 at the upper end of the gas spring 31 is pressed through the unlocking rod 3504 in the unlocking handle 35, so that the expansion and contraction of the gas spring 31 can be adjusted at will, and meanwhile, the inner sleeve 34 slides correspondingly in the outer sleeve 32; and finally, the lifting of the lifting component is realized.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are all within the protection scope of the present invention.

Claims

1. A lifting assembly, comprising: the method comprises the following steps:

a chassis;

2. The lift assembly of claim 1, wherein: the support telescopic mechanism comprises an outer sleeve and an inner sleeve arranged in the outer sleeve in a sliding mode, and the inner sleeve is sleeved outside the air spring.

3. The lift assembly of claim 2, wherein: the inner side wall of the outer sleeve is axially provided with a sliding groove, the outer side wall of the inner sleeve is provided with a corresponding sliding component, and the inner sleeve and the outer sleeve are installed in a matched mode through the sliding component and the sliding groove.

4. The lift assembly of claim 2, wherein: the adjusting sleeve comprises a hollow adjusting cylinder, and at least one bearing matched with the inner diameter of the outer sleeve is axially arranged on the outer side wall of the adjusting cylinder through a sleeve pin shaft.

5. The lift assembly of claim 4, wherein: the outer side wall of the adjusting cylinder is provided with at least one bearing notch, two side walls of the at least one bearing notch are provided with pin shaft grooves along the transverse direction, and the external member pin shaft is arranged in the pin shaft grooves.

6. The lift assembly of claim 5, wherein: an adjusting sliding groove communicated with the pin shaft groove is formed in the outer end of the adjusting cylinder along the axial direction, and a depth adjusting block is arranged in the adjusting sliding groove; the depth adjusting block comprises an adjusting block and matching feet, wherein the two sides of the adjusting block are respectively matched with the sleeve pin shaft in the pin shaft groove correspondingly; the position of the sleeve pin shaft on the side wall of the adjusting cylinder is adjusted by adjusting the depth of the depth adjusting block in the adjusting sliding groove.

7. The lift assembly of claim 6, wherein: the side surface of the matching foot matched with the sleeve pin shaft is designed into an inward inclined surface.

8. The lift assembly of claim 6, wherein: the depth adjusting block is packaged on the adjusting cylinder through a fixing plate, and a plurality of external member jackscrews are arranged on the fixing plate, are in contact with the adjusting block of the depth adjusting block and are used for adjusting the depth of the sliding groove of the depth adjusting block.

9. The lift assembly of claim 4, wherein: the inner side wall of the outer sleeve is axially provided with a sliding groove, the outer side wall of the adjusting cylinder is correspondingly provided with at least one bearing, and the adjusting cylinder slides in the outer sleeve through the bearing.

10. The lift assembly of claim 2, wherein: a hollow adjusting lantern ring is arranged at the upper end of the outer sleeve, and the inner sleeve penetrates through the adjusting lantern ring; and at least one bearing matched with the outer wall of the inner sleeve is arranged on the inner wall of the adjusting sleeve ring along the axial direction through a sleeve ring pin shaft.

11. The lift assembly of claim 10, wherein: the inner wall of the adjusting lantern ring is provided with at least one rolling groove, two side walls of the at least one rolling groove are provided with pin shaft adjusting holes along the transverse direction, and the lantern ring pin shaft is arranged in the pin shaft adjusting holes.

12. The lift assembly of claim 11, wherein: adjusting holes are formed in the positions, corresponding to the pin shaft adjusting holes, of the outer side wall of the adjusting lantern ring, and lantern ring jackscrews used for adjusting the lantern ring pin shafts are arranged in the adjusting holes.

13. The lift assembly of claim 2, wherein: the unlocking mechanism is characterized by further comprising an unlocking handle, the unlocking handle is matched with an unlocking button at the upper end of the air spring to realize the lifting of the air spring, and meanwhile, the inner sleeve is driven to be synchronously telescopic in the outer sleeve.

14. The lift assembly of claim 13, wherein: the unlocking handle comprises a handle sleeve and a handle shell, the handle sleeve is fixed at the upper end of the inner sleeve, and the handle shell is arranged on the side surface of the handle sleeve and is communicated with the handle sleeve; an unlocking rod is rotatably arranged in the handle shell at the front middle position through an unlocking shaft, the tail end of the unlocking rod extends into the handle sleeve, and the inner side of the tail end of the unlocking rod is matched with an unlocking button at the upper end of the air spring; the handle shell is connected with the unlocking rod through a spring, and an unlocking button is arranged on the inner side of the front end of the unlocking rod.

15. The lift assembly of claim 14, wherein: the handle shell is of a bent structure, and the shape of an unlocking rod in the handle shell corresponds to that of the handle shell; the bending angle of the bending structure is 60-180 degrees.

16. The lift assembly of claim 14, wherein: the handle fixing device is characterized in that a plurality of handle fixing grooves are formed in the outer wall of the upper end of the inner sleeve, handle fixing ribs corresponding to the handle fixing grooves are axially arranged on the inner wall of the handle sleeve, and the handle sleeve and the inner sleeve are fixedly installed through matching of the handle fixing grooves and the handle fixing ribs.

17. The lift assembly of claim 14, wherein: and a stop groove is also arranged at the outer side of the tail end of the unlocking rod, and the motion limitation of the unlocking rod is realized through the matching of the stop groove and the side wall of the handle sleeve.

18. The lift assembly of claim 14, wherein: be provided with on the terminal surface under the handle sleeve and prevent bumping the piece, prevent bumping the piece and adopt the silica gel material.

19. The lift assembly of claim 1, wherein: the gas spring selects a proper nominal force specification according to the weight of the load bearing object.