CN215918333U - Cleaning device for big data all-in-one machine - Google Patents

Abstract

The utility model discloses a cleaning device for a big data all-in-one machine, which belongs to the technical field of big data cleaning and comprises a machine body, wherein a mechanism cavity and a sundry box are arranged in the machine body, a lifting mechanism is arranged in the mechanism cavity, a veneering dust wiper is fixedly arranged on the left side of the lifting mechanism, a hydraulic body seat is welded and arranged at the bottom end of the machine body, a floor-mounted dust cleaner is connected and arranged at the left end of the hydraulic body seat, dust cleaners are fixedly arranged at two ends in the floor-mounted dust cleaner, a dust collector is fixedly arranged at the center in the floor-mounted dust cleaner, the right end of the dust collector is communicated with a dust exhauster in the machine body through a flexible hose, and a dust exhaust pipe is communicated and arranged at the right end of the dust exhauster. The dust cleaning machine is novel in design, convenient to operate and good in using effect, dust on the side wall of the all-in-one machine can be quickly cleaned, dust cakes deposited at the bottom end of the all-in-one machine can be cleaned and sucked, and dust cleaning efficiency is improved.

Description

Cleaning device for big data all-in-one machine

Technical Field

The utility model relates to the technical field of big data cleaning, in particular to a cleaning device for a big data all-in-one machine.

Background

The large data all-in-one machine supports integration, storage, calculation and analysis mining of TB-PB level mass data based on a distributed parallel processing architecture of an industrial standard server, supports good horizontal expansion capability, adopts a whole cabinet server mode, carries the server in a full cabinet, and can save 75% of machine room space for users. The server is generally placed on the layer board in the rack, the gyro wheel of layer board rolls on the track of backup pad, the inside heat abstractor that adopts of rack dispels the heat to the server, because heat abstractor long-term work, the dust floats, can adhere to a lot of dust on the spare part in the rack for a long time, the dust on the track is accumulated more, the layer board is through push-and-pull many times, make the dust can make after being rolled by the gyro wheel many times on the track and form "ash cake" or "ash block", if not in time clear up, can influence the roll of gyro wheel, perhaps the phenomenon that the gyro wheel was blocked can appear.

The patent number CN107949228B discloses a cleaning device for a big data all-in-one machine, which effectively solves the problems of dust accumulation, roller jamming, difficulty in cleaning dust and the like on a supporting plate in a cabinet; the equipment cabinet comprises a plurality of stand columns, wherein supporting plates are fixed between the stand columns, supporting plates are placed on the two supporting plates, the supporting plates are in contact with the upper surfaces of the supporting plates through rollers, two rotary storage mechanisms are arranged inside the supporting plates, a cross beam is arranged above the supporting plates, two position sensors are arranged on the lower surfaces of the cross beams, and a cleaning mechanism is arranged between the cross beam and the supporting plates; adopt the inside rotatory storage mechanism that sets up of backup pad, the dust in the clearance backup pad at the high-efficient dead angle that does not keep of clearance mechanism, this structure adopts worm gear speed reducer motor that just reverses, makes rotatory storage mechanism reach more stable effectual opening and stops the effect, and clearance mechanism can unscheduled clean the dust to the rack under artificial operation, and the structure is ingenious, easy operation, and convenient to use is swift.

The above patents have the following disadvantages: 1. dust on the side wall of the integrated machine cannot be quickly wiped to remove the dust, so that the dust cleaning efficiency is reduced; 2. the dust cake deposited at the bottom end of the all-in-one machine cannot be cleaned and sucked, and the dust cleaning efficiency is reduced. Therefore, a cleaning device for the big data all-in-one machine is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cleaning device for a big data all-in-one machine, which is novel in design, convenient to operate and good in using effect, and aims to quickly clean dust on the side wall of the all-in-one machine through a veneering dust wiper and a lifting mechanism, so that the cleaning efficiency of the dust is improved; through pasting ground dust catcher and dust exhauster, can clean the dust absorption dust to the sedimentary dust cake in all-in-one bottom, improve the cleaning efficiency of dust.

The specific technical scheme provided by the utility model is as follows:

the utility model provides a cleaning device for a big data all-in-one machine, which comprises a machine body, wherein a mechanism cavity and a sundry box are arranged in the machine body, a lifting mechanism is arranged in the mechanism cavity, a veneering dust wiper is fixedly arranged on the left side of the lifting mechanism, a hydraulic body seat is welded and arranged at the bottom end of the machine body, a floor-mounted dust cleaner is connected and arranged at the left end of the hydraulic body seat, dust cleaners are fixedly arranged at two ends in the floor-mounted dust cleaner, a dust collector is fixedly arranged at the center in the floor-mounted dust cleaner, the right end of the dust collector is communicated with the dust remover in the machine body through a flexible hose, a dust exhaust pipe is communicated and arranged at the right end of the dust remover, the dust exhaust pipe is communicated in the dust storage box arranged on the side wall of the machine body, and two moving wheels are fixedly arranged at the bottom end of the hydraulic body seat.

Optionally, a thread mechanism rod is installed on the lifting mechanism, a thread sleeve body is installed on the thread mechanism rod, a reverse thread groove is designed inside the thread sleeve body, and a positive thread is designed on the thread mechanism rod.

Optionally, the upper end of the thread mechanism rod is inlaid with a rotary sleeve, the lower end of the thread mechanism rod is fixedly provided with a mechanism motor, and the lower end of the mechanism motor is provided with a fixed seat.

Optionally, a rotating motor is installed on the veneering dust wiper, a sponge disc is fixedly installed at the left end of the rotating motor through a rotating shaft neck, and dust wiping sponge is attached to the left end of the sponge disc.

Optionally, a sweeping motor is installed on the dust sweeping machine, a brush disc is installed at the lower end of the sweeping motor through a rotating shaft, a dust sweeping brush is installed on the brush disc, and a shaft sleeve is sleeved on the rotating shaft in an embedded mode.

Optionally, a shaft is installed in the center inside the dust collector, the shaft is fixedly provided with the blades, the upper end of the dust collector is communicated with and provided with the dust conveying pipe, and the lower end of the dust collector is provided with the dust suction nozzle.

Optionally, a rotary shaft is installed at the center inside the dust exhauster, a rotary vane is fixedly installed on the rotary shaft, and a dust suction port and a dust exhaust port are respectively formed in the upper end and the lower end of the dust exhauster.

Optionally, an oil storage cylinder and a hydraulic oil cylinder are arranged inside the hydraulic body seat, the oil storage cylinder is communicated with the hydraulic oil cylinder through a pressure regulator, and a telescopic rod is movably embedded in the hydraulic oil cylinder.

Optionally, the moving wheel is provided with a connecting seat, the lower end of the connecting seat is connected with a wheel buckle, and the wheel buckle is internally and movably provided with a roller.

The utility model has the following beneficial effects:

1. the utility model has novel design, convenient operation and good use effect, when the dust cleaning work of the big data all-in-one machine is carried out, the cleaning device is moved to the side of the all-in-one machine for cleaning by arranging the veneering dust wiper and the lifting mechanism, a worker tightly attaches the veneering dust wiper to the side wall of the all-in-one machine, a power switch is switched on, a rotating motor of the veneering dust wiper is electrified to work, a sponge disc is driven to rotate through a rotating shaft neck, dust wiping sponge on the sponge disc rotates along with the sponge disc to wipe dust on the side wall of the all-in-one machine, meanwhile, the worker controls a mechanism motor on the lifting mechanism to be electrified to work to drive a screw mechanism rod to rotate, so that the screw mechanism rod can rapidly rotate forwards and backwards, when the screw mechanism rod rotates, a self positive screw thread and a reverse thread groove of the screw sleeve body rotate to enable the screw sleeve body to freely lift up and down to drive the veneering dust wiper to lift and wipe dust on the side wall of the all-in-one machine, when the cleaning device is required to be moved left and right, workers only need to move the cleaning device by utilizing the movable wheels, so that dust on the side wall of the all-in-one machine can be quickly cleaned, and the cleaning efficiency of the dust is improved.

2. The utility model is provided with a ground dust cleaner and a dust exhauster, when the dust on the side wall of the integrated machine is cleaned, a worker turns on a power switch to enable a pressure regulator in a hydraulic body seat to work, hydraulic oil in an oil storage cylinder is conveyed into a hydraulic oil cylinder, the oil pressure is increased, a telescopic rod extends out, the ground dust cleaner extends to the bottom end of the integrated machine, meanwhile, a cleaning motor on the dust exhauster in the ground dust cleaner works, a brush disc is driven to rotate through a rotating shaft, the cleaning brush rotates to clean and smash deposited dust cakes, the dust exhauster works, a shaft rotates to drive blades to rotate to generate suction force, the smashed dust cakes are sucked by a dust suction nozzle and conveyed into a telescopic hose through a dust conveying pipe, the dust exhauster works, a rotary shaft of the dust exhauster rotates to drive rotary vanes to rotate to generate suction force to suck the dust in the telescopic hose, utilize the dust exhaust pipe emission in depositing the dirt case, so, can clean the sedimentary dust cake in all-in-one bottom and absorb the dust, improved the cleaning efficiency of dust.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a cleaning device for a big data all-in-one machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a lifting mechanism of a cleaning device for a big data all-in-one machine according to an embodiment of the utility model;

FIG. 3 is a schematic structural diagram of a facing dust wiper of a cleaning device for a big data all-in-one machine according to an embodiment of the utility model;

FIG. 4 is a schematic structural diagram of a dust collector of the cleaning device for the big data all-in-one machine according to the embodiment of the utility model;

FIG. 5 is a schematic structural diagram of a dust collector of the cleaning device for the big data all-in-one machine according to the embodiment of the utility model;

FIG. 6 is a schematic structural diagram of a dust exhaust machine of the cleaning device for the big data all-in-one machine according to the embodiment of the utility model;

FIG. 7 is a schematic structural diagram of a hydraulic fluid seat of a cleaning device for a big data all-in-one machine according to an embodiment of the utility model;

fig. 8 is a schematic structural diagram of a moving wheel of a cleaning device for a big data all-in-one machine according to an embodiment of the present invention.

In the figure: 1. a dust sweeper; 2. a dust remover attached to the ground; 3. a dust collector; 4. a flexible hose; 5. a body; 6. a facing dust wiper; 7. a lifting mechanism; 8. a mechanism cavity; 9. a glove box; 10. a dust exhaust machine; 11. a dust exhaust pipe; 12. a dust storage box; 13. a moving wheel; 14. a hydraulic body mount; 15. a fixed seat; 16. a mechanism motor; 17. a threaded bushing body; 18. screwing a sleeve; 19. a screw mechanism rod; 20. a reverse thread groove; 21. a positive thread; 22. a dust-wiping sponge; 23. a sponge tray; 24. a rotating journal; 25. a rotating electric machine; 26. a dust sweeping brush; 27. brushing a disc; 28. a shaft sleeve; 29. cleaning a motor; 30. a rotating shaft; 31. a dust suction nozzle; 32. a machine blade; 33. a dust conveying pipe; 34. a crankshaft; 35. a dust suction port; 36. a dust exhaust port; 37. rotating the shaft; 38. rotating leaves; 39. a telescopic rod; 40. a hydraulic cylinder; 41. a pressure regulating machine; 42. a reserve tube; 43. wheel buckle; 44. a connecting seat; 45. and a roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A cleaning device for a big data all-in-one machine according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 8.

Referring to fig. 1, a cleaning device for a big data all-in-one machine provided by an embodiment of the present invention includes a machine body 5, a mechanism cavity 8 and a glove compartment 9 are provided in the machine body 5, a lifting mechanism 7 is provided in the mechanism cavity 8, a facing dust wiper 6 is fixedly provided on the left side of the lifting mechanism 7, a hydraulic body base 14 is welded and installed at the bottom end of the machine body 5, a ground dust cleaner 2 is connected and installed at the left end of the hydraulic body base 14, dust cleaners 1 are fixedly installed at two ends of the interior of the ground dust cleaner 2, a dust collector 3 is fixedly installed at the center of the interior of the ground dust cleaner 2, the right end of the dust collector 3 is communicated with a dust exhauster 10 in the machine body 5 through a flexible hose 4, a dust exhaust pipe 11 is communicated and installed at the right end of the dust exhauster 10, the dust exhaust pipe 11 is communicated with a dust storage box 12 installed on the side wall of the machine body 5, two movable wheels 13 are fixedly installed at the bottom end of the hydraulic body base 14, dust on the side wall of the all-in-one machine can be quickly wiped to remove the dust, dust cakes deposited at the bottom end of the all-in-one machine can be cleaned to absorb the dust, and the dust cleaning efficiency is improved.

Referring to fig. 2, a thread mechanism rod 19 is installed on the lifting mechanism 7, a thread sleeve body 17 is installed on the thread mechanism rod 19, a reverse thread groove 20 is designed inside the thread sleeve body 17, a positive thread 21 is designed on the thread mechanism rod 19, and the lifting mechanism 7 is used for freely lifting, driving and adjusting the facing dust wiper 6, so that dust can be wiped and cleaned conveniently.

Referring to fig. 2, a rotating sleeve 18 is inserted and sleeved at the upper end of the screw mechanism rod 19, a mechanism motor 16 is fixedly mounted at the lower end of the screw mechanism rod 19, a fixed seat 15 is mounted at the lower end of the mechanism motor 16, and the mechanism motor 16 is used for driving the screw mechanism rod 19 to rotate.

Referring to fig. 3, a rotating motor 25 is installed on the facing dust wiper 6, a sponge disc 23 is fixedly installed at the left end of the rotating motor 25 through a rotating shaft neck 24, a dust wiping sponge 22 is attached to the left end of the sponge disc 23, and the facing dust wiper 6 is used for quickly wiping and removing dust on the side wall of the all-in-one machine.

Referring to fig. 4, install on the dust sweeper 1 and clean motor 29, clean motor 29 lower extreme and install brush dish 27 through axis of rotation 30, install the brush 26 on the brush dish 27, the cover has axle sleeve 28 on the axis of rotation 30, and the dust sweeper 1 is used for cleaning the sedimentary dust cake in all-in-one bottom and smashing, makes things convenient for the dust catcher 3 to absorb it.

Referring to fig. 5, a shaft 34 is installed in the center of the interior of the dust collector 3, the shaft 34 is fixedly provided with the organic blades 32, the upper end of the dust collector 3 is communicated with and provided with a dust conveying pipe 33, the lower end of the dust collector 3 is provided with a dust suction nozzle 31, and the dust collector 3 is used for sucking broken dust cakes.

Referring to fig. 6, a rotating shaft 37 is installed at the center inside the dust exhaust 10, a rotating blade 38 is fixedly installed on the rotating shaft 37, a dust suction port 35 and a dust exhaust port 36 are respectively formed at the upper end and the lower end of the dust exhaust 10, and the dust exhaust 10 is used for conveying and discharging dust sucked by the dust exhaust 3 into the dust storage box 12.

Referring to fig. 7, an oil storage cylinder 42 and a hydraulic oil cylinder 40 are arranged inside the hydraulic body seat 14, the oil storage cylinder 42 is communicated with the hydraulic oil cylinder 40 through a pressure regulating machine 41, an expansion link 39 is movably embedded in the hydraulic oil cylinder 40, and the hydraulic body seat 14 is used for extending and retracting the ground-contacting dust remover 2 and placing the ground-contacting dust remover at a cleaning position at the bottom end of the all-in-one machine.

Referring to fig. 8, the moving wheel 13 is provided with a connecting seat 44, the lower end of the connecting seat 44 is connected with a wheel buckle 43, a roller 45 is movably arranged in the wheel buckle 43, and the moving wheel 13 is used for conveniently moving the cleaning device, so that labor force is saved.

The embodiment of the utility model provides a cleaning device for a big data all-in-one machine, when in use, the cleaning device is moved to the side of the all-in-one machine for cleaning by arranging a veneering dust wiper 6 and a lifting mechanism 7 when the dust cleaning work of the big data all-in-one machine is carried out, a worker tightly attaches the veneering dust wiper 6 to the side wall of the all-in-one machine, a power switch is turned on, a rotating motor 25 of the veneering dust wiper 6 is electrified for work, a sponge disc 23 is driven to rotate by a rotating shaft neck 24, a dust wiping sponge 22 on the sponge disc 23 rotates along with the sponge disc to wipe dust on the side wall of the all-in-one machine, meanwhile, the worker controls a mechanism motor 16 on the lifting mechanism 7 to be electrified for work to drive a thread mechanism rod 19 to rotate, so that the thread mechanism rod 19 can carry out fast forward rotation and reverse rotation, when the thread mechanism rod 19 rotates, the self forward thread 21 and a reverse thread groove 20 of a thread sleeve body 17 rotate, the threaded sleeve body 17 is freely lifted to drive the veneering dust wiper 6 to lift and wipe dust on the side wall of the all-in-one machine, when wiping needs to be carried out in a left-right moving mode, a worker only needs to move the cleaning device by using the moving wheel, so that the dust on the side wall of the all-in-one machine can be quickly wiped and removed, and the dust cleaning efficiency is improved; by arranging the ground dust cleaner 2 and the dust exhaust machine 10, after the dust on the side wall of the all-in-one machine is cleaned, a worker turns on a power switch to enable a pressure regulator 41 in a hydraulic body seat 14 to work, hydraulic oil in an oil storage cylinder 42 is conveyed into a hydraulic oil cylinder 40, the oil pressure is increased, a telescopic rod 39 extends out, the ground dust cleaner 2 extends to the bottom end of the all-in-one machine, meanwhile, a cleaning motor 29 on a dust cleaner 1 in the ground dust cleaner 2 works, a brush disc 27 is driven to rotate through a rotating shaft 30, a dust cleaning brush 26 rotates to clean and break deposited dust cakes, a dust collector 3 works, a machine shaft 34 rotates, a motor blade 32 rotates to generate suction force, the broken dust cakes are sucked through a dust suction nozzle 31 and conveyed into a telescopic hose 4 through a dust conveying pipe 33, the dust exhaust machine 10 works, and a rotating shaft 37 of the dust exhaust machine 10 rotates, the rotary vane 38 is driven to rotate to generate suction force, dust in the flexible hose 4 is sucked, and the dust discharging pipe 11 is arranged in the dust storage box 12, so that dust cakes deposited at the bottom end of the all-in-one machine can be cleaned and sucked, and the dust cleaning efficiency is improved.

The mechanism motor 16 is a commercially available model number YE 3; the rotating motor 25 and the sweeping motor 29 are both of a commercially available ACSM130 type; the pressure regulating machine 41 is a common WY5.2-A type in the market.

The utility model is a cleaning device for a big data all-in-one machine, which comprises a dust sweeper 1, a ground-attached dust cleaner 2, a dust collector 3, a flexible hose 4, a machine body 5, a surface-attached dust wiper 6, a lifting mechanism 7, a mechanism cavity 8, a sundries box 9, a dust exhauster 10, a dust exhaust pipe 11, a dust storage box 12, a movable wheel 13, a hydraulic body seat 14, a fixed seat 15, a mechanism motor 16, a threaded sleeve body 17, a rotary sleeve 18, a threaded mechanism rod 19, a reverse threaded groove 20, a positive thread 21, a dust wiping sponge 22, a sponge disc 23, a rotary shaft neck 24, a rotary motor 25, a dust sweeping brush 26, a brush disc 27, a shaft sleeve 28, a cleaning motor 29, a rotary shaft 30, a dust suction nozzle 31, a machine blade 32, a dust conveying pipe 33, a machine shaft 34, a dust suction port 35, a dust suction port 36, a rotary shaft 37, a rotary blade 38, a telescopic rod 39, a hydraulic oil cylinder 40, a pressure regulator 41, an oil storage cylinder 42, a wheel buckle 43, a connecting seat 44, a connecting seat, The roller 45 and the above electrical components are all prior art products, and those skilled in the art select, install and complete the debugging operation of the circuit according to the use requirement, so as to ensure that each electrical appliance can work normally, and the components are all universal standard components or components known by those skilled in the art, and the structure and principle of the components are known by the technical manual or by the conventional experimental method, and the applicant does not make specific limitation here.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (9)

1. The utility model provides a cleaning device for big data all-in-one which characterized in that: comprises a machine body (5), a mechanism cavity (8) and a glove compartment (9) are arranged inside the machine body (5), an elevating mechanism (7) is arranged inside the mechanism cavity (8), a veneering dust wiper (6) is fixedly arranged on the left side of the elevating mechanism (7), a hydraulic pressure body seat (14) is welded and arranged at the bottom end of the machine body (5), a flooring dust cleaner (2) is connected and arranged at the left end of the hydraulic pressure body seat (14), dust cleaners (1) are fixedly arranged at two ends inside the flooring dust cleaner (2), dust collectors (3) are fixedly arranged at the centers inside of the flooring dust cleaners (2), the right end of each dust collector (3) is communicated with a dust exhauster (10) inside the machine body (5) through a flexible hose (4), a dust exhaust pipe (11) is communicated and arranged at the right end of each dust exhauster (10), the dust exhaust pipe (11) is communicated with a dust storage box (12) arranged on the side wall of the machine body (5), two moving wheels (13) are fixedly installed at the bottom end of the hydraulic body seat (14).

2. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: install screw thread mechanism pole (19) on elevating system (7), install screw thread cover body (17) on screw thread mechanism pole (19), screw thread cover body (17) internal design has reverse thread groove (20), the design has positive screw thread (21) on screw thread mechanism pole (19).

3. The cleaning device for the big data all-in-one machine as claimed in claim 2, wherein: the upper end of the thread mechanism rod (19) is inlaid with a rotary sleeve (18), the lower end of the thread mechanism rod (19) is fixedly provided with a mechanism motor (16), and the lower end of the mechanism motor (16) is provided with a fixed seat (15).

4. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: the dust cleaning device is characterized in that a rotary motor (25) is mounted on the attaching surface dust cleaner (6), a sponge disc (23) is fixedly mounted at the left end of the rotary motor (25) through a rotary shaft neck (24), and dust cleaning sponge (22) is attached to the left end of the sponge disc (23).

5. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: install on dust sweeper (1) and clean motor (29), brush dish (27) is installed through axis of rotation (30) to clean motor (29) lower extreme, install dust sweeper (26) on brush dish (27), it has axle sleeve (28) to inlay the cover on axis of rotation (30).

6. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: a machine shaft (34) is installed at the center of the interior of the dust collector (3), organic blades (32) are fixedly installed on the machine shaft (34), a dust conveying pipe (33) is installed at the upper end of the dust collector (3) in a communicated mode, and a dust suction nozzle (31) is formed in the lower end of the dust collector (3).

7. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: the dust exhaust machine is characterized in that a rotary shaft (37) is installed at the center inside the dust exhaust machine (10), rotary blades (38) are fixedly installed on the rotary shaft (37), and a dust suction port (35) and a dust exhaust port (36) are respectively formed in the upper end and the lower end of the dust exhaust machine (10).

8. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: an oil storage cylinder (42) and a hydraulic oil cylinder (40) are arranged in the hydraulic body seat (14), the oil storage cylinder (42) is communicated with the hydraulic oil cylinder (40) through a pressure regulator (41), and an expansion rod (39) is movably embedded in the hydraulic oil cylinder (40).

9. The cleaning device for the big data all-in-one machine as claimed in claim 1, wherein: the movable wheel (13) is provided with a connecting seat (44), the lower end of the connecting seat (44) is connected with a wheel buckle (43), and a roller (45) is movably arranged in the wheel buckle (43).

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