CN212608674U

CN212608674U - Combined type cable automatic winding device for power engineering

Info

Publication number: CN212608674U
Application number: CN202021017793.5U
Authority: CN
Inventors: 朱敏
Original assignee: Hefei Jinli Power Supply Equipment Co ltd
Current assignee: Hefei Jinli Power Supply Equipment Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-26
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a combined type automatic cable winding device for power engineering, which comprises a bottom plate, wherein a vertically arranged stand column is fixedly arranged in the middle of the top surface of the bottom plate, and a rectangular driving cavity is vertically arranged in the stand column; the top surfaces of the bottom plates at the two sides of the upright post are fixedly provided with rectangular boxes; the inner ring of each first bearing is fixedly provided with a vertically arranged first round rod, the top end of each first round rod is horizontally and fixedly provided with a disc-shaped lower clamping plate, and the middle part of the top surface of each lower clamping plate is fixedly provided with a vertically arranged lower clamping column; each lower clamping column is movably sleeved with a vertically arranged winding reel; the utility model is convenient to operate, and solves the problem that the existing winding drum is inconvenient to install and disassemble through the lifting adjustment of the upper clamping plate; the problem that a plurality of existing cables are long in time consumption when being wound is solved through the driving assembly and the transmission assembly; it is not convenient for support fixed problem according to different bobbin footpaths winding reel to have solved current cable coiling mechanism through the internal stay subassembly.

Description

Combined type cable automatic winding device for power engineering

Technical Field

The utility model relates to a technical field of the cable rolling especially relates to a combination formula cable automatic winding device for electric power engineering.

Background

Electric power engineering, i.e. engineering related to the production, transmission and distribution of electric energy, and also engineering using electricity as power and energy in a wide variety of fields; in the prior art, several workers are generally adopted to wind and roll the cable on the winding roller for winding, and the existing cable winding device adopts a winding reel and a motor, so that the waste of equipment resources is easily caused; the existing cable winding device is inconvenient for workers to install and detach the winding reel, and can only wind one cable, so that the winding working time is long under the condition of more cables, and the winding working efficiency is influenced; the existing winding device has the problem that the winding roll is inconvenient to support and fix according to different roll diameters.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that the practicality is not good among the prior art, and the combined type cable automatic winding device for the electric power engineering who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a combined type automatic cable winding device for power engineering comprises a bottom plate, wherein the bottom plate is in a horizontally arranged rectangular plate shape, a vertically arranged upright post is fixedly installed in the middle of the top surface of the bottom plate, a rectangular driving cavity is vertically formed in the upright post, and a driving assembly is fixedly installed in the driving cavity; rectangular boxes are fixedly arranged on the top surfaces of the bottom plates on the two sides of the upright post, and a transmission assembly is fixedly arranged in each rectangular box; the middle part of the top surface of each rectangular box is fixedly provided with a first bearing which is horizontally arranged, an inner ring of each first bearing is fixedly provided with a first round rod which is vertically arranged, the top end of each first round rod is horizontally and fixedly provided with a disc-shaped lower clamping plate, and the middle part of the top surface of each lower clamping plate is fixedly provided with a vertically arranged lower clamping column; a vertically arranged winding reel is movably sleeved on each lower clamping column;

a vertically arranged telescopic rod is fixedly installed in the middle of the top surface of the upright column, a transversely arranged threaded sleeve is fixedly installed at the top end of the telescopic rod, two ends in the threaded sleeve are spirally connected with transversely arranged pressing rods, a vertically arranged second round rod is movably installed at the outer end of the bottom surface of each pressing rod, a disc-shaped upper clamping plate is horizontally arranged below the bottom end of each second round rod, a second bearing is fixedly installed in the middle of the top surface of the upper clamping plate, and the bottom end of each second round rod is fixedly connected in an inner ring of the second bearing; the middle part of the bottom surface of each upper clamping plate is fixedly provided with an upper clamping column which is vertically arranged, and the top ends of each lower clamping column and each upper clamping column are in a taper shape; each upper clamping column is vertically movably inserted in the winding reel; and the column bodies of the lower clamping column and the upper clamping column are respectively and movably provided with an inner support component.

Preferably, the driving assembly comprises a motor, a worm wheel and a worm, a horizontally arranged partition plate is fixedly installed in the middle of the driving cavity, a vertically arranged motor is fixedly installed in a cavity in the upper portion of the partition plate, a bearing groove is vertically formed in the middle of the top surface of the partition plate, a horizontally arranged third bearing is fixedly installed in the bearing groove, and the bottom end of a motor shaft of the motor is fixedly connected with an inner ring of the third bearing and extends to the lower portion of the partition plate; circular through holes are transversely formed in the bottoms of the inner walls of the two sides of the driving cavity, a vertically arranged fourth bearing is fixedly arranged in each circular through hole, the worm is transversely arranged in the driving cavity, and two ends of the worm are fixedly connected in the inner ring of the fourth bearing; the two ends of the worm extend out of the driving cavity, a horizontally arranged worm wheel is fixedly mounted at the bottom end of a motor shaft of the motor, and the worm wheel and the worm are in meshing transmission.

Preferably, the transmission assembly comprises driving bevel gears and driven bevel gears, vertically arranged fifth bearings are fixedly arranged on the inner wall of one side, close to the stand column, of each of the rectangular boxes, transversely arranged rotating rods are fixedly arranged in the inner ring of each of the fifth bearings, vertically arranged driving bevel gears are fixedly arranged at one end of each of the rotating rods, the bottom end of each of the first round rods penetrates through the rectangular boxes, horizontally arranged driven bevel gears are fixedly arranged at the bottom ends of the first round rods, and the driving bevel gears and the driven bevel gears are in meshing transmission; every the other end of dwang all runs through out outside the rectangle case, and every the other end of dwang all passes through shaft coupling and the coaxial fixed connection of worm.

Preferably, the inner support assembly comprises an inner support plate, a thrust spring and an anti-skid bump, wherein the inner support plate is a broken line type arc plate matched with the pointed cone ends of the lower clamping column and the upper clamping column; a plurality of vertically arranged inner supporting plates are movably arranged on the surfaces of the cylinders of the lower clamping column and the upper clamping column, a plurality of transversely arranged thrust springs are fixedly arranged on the inner arc surface of each inner supporting plate, and the inner end of each thrust spring is fixedly connected with the cylinder of the lower clamping column or the upper clamping column; a plurality of trapezoidal anti-skid lugs are transversely protruded on the outer arc surface of each inner supporting plate.

Preferably, a circular slot is formed in the outer end of the bottom surface of each compression bar, the top end of each second round bar is fixedly inserted into the slot, a first threaded hole is transversely formed in the middle of the outer end of each compression bar, and the first threaded holes are communicated with the slots; every equal threaded connection of first threaded hole has the locking bolt of horizontal setting all transversely seted up the second threaded hole on the cylinder of one side that the second round bar is located the slot, and every equal threaded connection in second threaded hole in the inner of locking bolt.

Preferably, a layer of non-slip mat is fixedly arranged on the top surface of the lower clamping plate and the bottom surface of the upper clamping plate, and a plurality of non-slip round blocks are fixedly arranged on the bottom surface of the non-slip mat of the upper clamping plate at equal intervals; and four corners of the bottom surface of the bottom plate are fixedly provided with movable wheels.

Compared with the prior art, the beneficial effects of the utility model are that: in the utility model, the winding reel can be conveniently mounted and dismounted by the lifting adjustment of the upper clamping plate, thereby effectively solving the problem that the existing winding reel is inconvenient to mount and dismount; the two lower clamping plates are conveniently driven to rotate through the driving assembly and the transmission assembly, the winding reels are conveniently driven to perform winding work through the lower clamping plates, the two cables are conveniently wound simultaneously through the two winding reels, the working efficiency of the cables is effectively increased, and the working time of winding the cables is effectively shortened; the problem that a plurality of existing cables are long in time consumption during winding is solved; the utilization rate of equipment is effectively improved, and the consumption of resources is saved; be convenient for effectively prevent through interior subassembly that props that the spool can't follow the pivoted condition and take place when pressing from both sides the post and driving the spool and rotate down, be convenient for play simultaneously and can carry out the effect that supports to the spool of different section of thick bamboo footpaths, effectively solved current cable winding device and be not convenient for support fixed problem according to different section of thick bamboo footpath spools.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limitation. In the drawings:

fig. 1 is a schematic view of a front view structure of a combined automatic cable winding device for power engineering according to the present invention;

fig. 2 is a schematic view of a front view cross-sectional structure of a combined automatic cable winding device for power engineering according to the present invention;

fig. 3 is a schematic view of a top-view cross-sectional structure of an inner support assembly of the combined automatic cable winding device for power engineering according to the present invention;

fig. 4 is an enlarged schematic view of a section structure at a position a of the combined automatic cable winding device for power engineering according to the present invention;

fig. 5 is an enlarged schematic view of a structure of a position B of the combined automatic cable winding device for power engineering according to the present invention;

number in the figure: the anti-skidding mechanism comprises a bottom plate 1, an upright post 2, a rectangular box 3, a first round rod 4, a lower clamping plate 5, a lower clamping column 6, a winding reel 7, a telescopic rod 8, a threaded sleeve 9, a pressure rod 10, a second round rod 11, an upper clamping plate 12, an upper clamping column 13, a motor 14, a worm wheel 15, a worm 16, driving bevel teeth 17, driven bevel teeth 18, an inner supporting plate 19, a thrust spring 20, an anti-skidding lug 21, a locking bolt 22, an anti-skidding cushion 23, an anti-skidding round block 24 and a moving wheel 25.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example (b): referring to fig. 1-5, the utility model provides an automatic combined cable winding device for electric power engineering, including bottom plate 1, bottom plate 1 is the rectangle plate form that sets up horizontally, fixedly installs vertical stand 2 in the middle part of the top surface of bottom plate 1, vertically sets up rectangular drive chamber in stand 2, fixedly installs drive assembly in the drive chamber; the top surfaces of the bottom plates 1 on the two sides of the upright post 2 are fixedly provided with rectangular boxes 3, and a transmission assembly is fixedly arranged in each rectangular box 3; a horizontally arranged first bearing is fixedly arranged in the middle of the top surface of each rectangular box 3, a vertically arranged first round rod 4 is fixedly arranged in an inner ring of each first bearing, a disc-shaped lower clamping plate 5 is horizontally and fixedly arranged at the top end of each first round rod 4, and a vertically arranged lower clamping column 6 is fixedly arranged in the middle of the top surface of each lower clamping plate 5; a vertically arranged winding reel 7 is movably sleeved on each lower clamping column 6; a vertically arranged telescopic rod 8 is fixedly installed in the middle of the top surface of the upright column 2, a transversely arranged threaded sleeve 9 is fixedly installed at the top end of the telescopic rod 8, transversely arranged press rods 10 are spirally connected to both ends in the threaded sleeve 9, a vertically arranged second round rod 11 is movably installed at the outer end of the bottom surface of each press rod 10, a disc-shaped upper clamping plate 12 is horizontally arranged below the bottom end of each second round rod 11, a second bearing is fixedly installed in the middle of the top surface of the upper clamping plate 12, and the bottom end of each second round rod 11 is fixedly connected to the inner ring of the second bearing; an upper clamping column 13 which is vertically arranged is fixedly arranged in the middle of the bottom surface of each upper clamping plate 12, and the top ends of each lower clamping column 6 and each upper clamping column 13 are in a taper shape; each upper clamping column 13 is vertically movably inserted in the winding reel 7; and inner support components are movably arranged on the columns of the lower clamping column 6 and the upper clamping column 13.

In the utility model, the driving component comprises a motor 14, a worm wheel 15 and a worm 16, a horizontally arranged partition board is fixedly arranged in the middle of the driving cavity, a vertically arranged motor 14 is fixedly arranged in the cavity at the upper part of the partition board, a bearing groove is vertically arranged in the middle of the top surface of the partition board, a horizontally arranged third bearing is fixedly arranged in the bearing groove, and the bottom end of the motor shaft of the motor 14 is fixedly connected with the inner ring of the third bearing and extends to the lower part of the partition board; circular through holes are transversely formed in the bottoms of the inner walls of the two sides of the driving cavity, a vertically arranged fourth bearing is fixedly arranged in each circular through hole, the worm 16 is transversely arranged in the driving cavity, and two ends of the worm 16 are fixedly connected into inner rings of the fourth bearings; the two ends of the worm 16 extend out of the driving cavity, a worm wheel 15 which is horizontally arranged is fixedly installed at the bottom end of a motor shaft of the motor 14, the worm wheel 15 and the worm 16 are in meshing transmission, and two groups of transmission assemblies are conveniently driven to rotate simultaneously through the meshing transmission between the worm wheel 15 and the worm 16.

In the utility model, the transmission assembly comprises an active bevel gear 17 and a passive bevel gear 18, a vertically arranged fifth bearing is fixedly arranged on the inner wall of one side of the rectangular box 3 close to the upright post 2, a horizontally arranged rotating rod is fixedly arranged in the inner ring of each fifth bearing, an active bevel gear 17 is fixedly arranged at one end of each rotating rod, the bottom end of each first round rod 4 penetrates into the rectangular box 3, a horizontally arranged passive bevel gear 18 is fixedly arranged at the bottom end of the first round rod 4, and the active bevel gear 17 and the passive bevel gear 18 are in meshing transmission; every the other end of dwang all runs through out outside rectangle case 3, and every the other end of dwang all passes through shaft coupling and the 16 coaxial fixed connection of worm.

In the utility model, the inner supporting component comprises an inner supporting plate 19, a thrust spring 20 and an anti-skid block 21, wherein the inner supporting plate 19 is a broken line type arc plate matched with the pointed conical ends of the lower clamping column 6 and the upper clamping column 13; a plurality of vertically arranged inner supporting plates 19 are movably arranged on the surfaces of the cylinders of the lower clamping column 6 and the upper clamping column 13, a plurality of transversely arranged thrust springs 20 are fixedly arranged on the inner arc surface of each inner supporting plate 19, and the inner end of each thrust spring 20 is fixedly connected with the cylinder of the lower clamping column 6 or the upper clamping column 13; every equal horizontal arch has a plurality of trapezoidal anti-skidding lugs 21 on the extrados of interior fagging 19, is convenient for increase the frictional force of interior fagging 19 and bobbin 7 inner wall through anti-skidding lugs 21, is convenient for effectively prevent that bobbin 7 can't follow the pivoted condition and take place when lower clamp post 6 drives bobbin 7 and rotates.

In the utility model, a circular slot is arranged at the outer end of the bottom surface of each compression bar 10, the top end of each second round bar 11 is fixedly inserted into the slot, a first threaded hole is transversely arranged at the middle part of the outer end of each compression bar 10, and the first threaded hole is communicated with the slot; each first threaded hole is spirally connected with a transversely arranged locking bolt 22, a second threaded hole is transversely formed in one side column body of the second round rod 11 positioned in the slot, the inner end of each locking bolt 22 is spirally connected into the second threaded hole, and the locking bolts 22 are used for limiting, fixing, installing and disassembling the second round rod 11; a layer of anti-slip mat 23 is fixedly arranged on the top surface of the lower clamping plate 5 and the bottom surface of the upper clamping plate 12, a plurality of anti-slip round blocks 24 are fixedly arranged on the bottom surface of the anti-slip mat 23 of the upper clamping plate 12 at equal intervals, and the anti-slip mat 23 and the anti-slip round blocks 24 are convenient for effectively increasing the friction force on the two ends of the winding reel 7 and clamping and fixing the winding reel 7; all fixed mounting has the removal wheel 25 in the bottom surface four corners of bottom plate 1, is convenient for the removal transport of coiling mechanism through removing wheel 25.

When the utility model is used, firstly, the telescopic rod 8 and the motor 14 are respectively and electrically connected with an external power supply through wires; firstly, working personnel respectively sleeve two winding reels 7 on the columns of two lower clamping posts 6, a compression bar 10 at two ends of a threaded sleeve 9 is conveniently driven by controlling the extension and retraction of a telescopic rod 8 to drive an upper clamping plate 12 at the bottom end of a second round bar 11 to lift, an upper clamping post 13 is conveniently driven to vertically insert into the winding reel 7 through the upper clamping plate 12, and the winding reel 7 is conveniently and fixedly clamped through the lower clamping plate 5 and the upper clamping plate 12; meanwhile, the winding reel 7 is convenient to mount and dismount through the lifting adjustment of the upper clamping plate 12, and the problem that the existing winding reel is inconvenient to mount and dismount is effectively solved; after the winding reel 7 is installed, the worker fixes one end of the cable to be wound on the winding reel 7, then the control motor 14 drives the worm wheel 15 to rotate, the meshing transmission of the worm wheel 15 and the worm 16 is convenient for driving the rotating rods at the two ends of the worm 16 to rotate, the two driving bevel gears 17 are driven to rotate by the rotation of the two rotating rods, the two first round rods 4 are driven to rotate by the meshing transmission of the driving bevel gears 17 and the driven bevel gears 18, the rotation of the two first round rods 4 is convenient to drive the lower clamping columns 6 on the top surface of the lower clamping plate 5 to rotate, the winding reels 7 are driven to wind conveniently through the rotation of the lower clamping plate 5 and the lower clamping columns 6, two cables can be wound conveniently through the two winding reels 7, the working efficiency of the cables is effectively increased, and the working time of winding a plurality of cables is effectively shortened; the problem that a plurality of existing cables are long in time consumption during winding is solved; the utilization rate of equipment is effectively improved, and the consumption of resources is saved; through under thrust spring 20's elastic force effect, be convenient for make the interior backup pad 19 in the interior subassembly that props tightly support and press on the inner wall of bobbin 7, through interior backup pad 19 on the extrados anti-skidding lug 21, be convenient for increase the frictional force of interior backup pad 19 and bobbin 7 inner wall, be convenient for effectively prevent that bobbin 7 can't follow the pivoted condition when pressing from both sides post 6 under and driving bobbin 7 and rotate and take place, be convenient for play simultaneously and can carry out the effect of supporting to the bobbin of different section of thick bamboo footpaths, effectively solved current cable winding device and be not convenient for support fixed problem according to different bobbin footpaths bobbins.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a combination formula cable automatic winding device for electric power engineering, includes bottom plate (1), its characterized in that: the bottom plate (1) is in a horizontally arranged rectangular plate shape, a vertically arranged upright post (2) is fixedly installed in the middle of the top surface of the bottom plate (1), a rectangular driving cavity is vertically formed in the upright post (2), and a driving assembly is fixedly installed in the driving cavity; rectangular boxes (3) are fixedly arranged on the top surfaces of the bottom plates (1) on the two sides of the upright post (2), and a transmission assembly is fixedly arranged in each rectangular box (3); the middle part of the top surface of each rectangular box (3) is fixedly provided with a first bearing which is horizontally arranged, a first round rod (4) which is vertically arranged is fixedly arranged in an inner ring of each first bearing, the top end of each first round rod (4) is horizontally and fixedly provided with a disc-shaped lower clamping plate (5), and the middle part of the top surface of each lower clamping plate (5) is fixedly provided with a lower clamping column (6) which is vertically arranged; a vertically arranged winding reel (7) is movably sleeved on each lower clamping column (6);

a vertically arranged telescopic rod (8) is fixedly installed in the middle of the top surface of the upright column (2), a transversely arranged threaded sleeve (9) is fixedly installed at the top end of the telescopic rod (8), two ends in the threaded sleeve (9) are spirally connected with transversely arranged press rods (10), a vertically arranged second round rod (11) is movably installed at the outer end of the bottom surface of each press rod (10), a disc-shaped upper clamping plate (12) is horizontally arranged below the bottom end of each second round rod (11), a second bearing is fixedly installed in the middle of the top surface of the upper clamping plate (12), and the bottom end of each second round rod (11) is fixedly connected into an inner ring of the second bearing; the middle part of the bottom surface of each upper clamping plate (12) is fixedly provided with an upper clamping column (13) which is vertically arranged, and the top ends of each lower clamping column (6) and each upper clamping column (13) are in a taper shape; each upper clamping column (13) is vertically movably inserted in the winding reel (7); and inner support components are movably arranged on the columns of the lower clamping column (6) and the upper clamping column (13).

2. The combined type cable automatic winding device for the power engineering as claimed in claim 1, wherein: the driving assembly comprises a motor (14), a worm wheel (15) and a worm (16), a horizontally arranged partition plate is fixedly installed in the middle of the driving cavity, the vertically arranged motor (14) is fixedly installed in a cavity in the upper portion of the partition plate, a bearing groove is vertically formed in the middle of the top surface of the partition plate, a horizontally arranged third bearing is fixedly installed in the bearing groove, and the bottom end of a motor shaft of the motor (14) is fixedly connected with an inner ring of the third bearing and extends to the lower portion of the partition plate; circular through holes are transversely formed in the bottoms of the inner walls of the two sides of the driving cavity, a vertically arranged fourth bearing is fixedly arranged in each circular through hole, the worm (16) is transversely arranged in the driving cavity, and the two ends of the worm (16) are fixedly connected into the inner ring of the fourth bearing; the two ends of the worm (16) extend out of the driving cavity, a horizontally arranged worm wheel (15) is fixedly mounted at the bottom end of a motor shaft of the motor (14), and the worm wheel (15) and the worm (16) are in meshing transmission.

3. The combined type cable automatic winding device for the power engineering as claimed in claim 2, wherein: the transmission assembly comprises driving bevel gears (17) and driven bevel gears (18), vertically-arranged fifth bearings are fixedly arranged on the inner wall of one side, close to the stand column (2), of each rectangular box (3), transversely-arranged rotating rods are fixedly arranged in the inner ring of each fifth bearing, vertically-arranged driving bevel gears (17) are fixedly arranged at one ends of the rotating rods, the bottom end of each first round rod (4) penetrates through the rectangular box (3), horizontally-arranged driven bevel gears (18) are fixedly arranged at the bottom ends of the first round rods (4), and the driving bevel gears (17) and the driven bevel gears (18) are in meshing transmission; every the other end of dwang all runs through out outside rectangle case (3), and every the other end of dwang all passes through shaft coupling and the coaxial fixed connection of worm (16).

4. The combined type cable automatic winding device for the power engineering as claimed in claim 1, wherein: the inner support component comprises an inner support plate (19), a thrust spring (20) and an anti-skid bump (21), wherein the inner support plate (19) is a broken line type arc plate matched with the pointed cone ends of the lower clamping column (6) and the upper clamping column (13); a plurality of vertically arranged inner supporting plates (19) are movably mounted on the surfaces of the cylinders of the lower clamping column (6) and the upper clamping column (13), a plurality of transversely arranged thrust springs (20) are fixedly mounted on the inner arc surface of each inner supporting plate (19), and the inner end of each thrust spring (20) is fixedly connected with the cylinder of the lower clamping column (6) or the upper clamping column (13); a plurality of trapezoidal anti-skid lugs (21) are transversely protruded on the outer arc surface of each inner supporting plate (19).

5. The combined type cable automatic winding device for the power engineering as claimed in claim 1, wherein: a circular slot is formed in the outer end of the bottom surface of each compression bar (10), the top end of each second round bar (11) is fixedly inserted into the slot, a first threaded hole is transversely formed in the middle of the outer end of each compression bar (10), and the first threaded holes are communicated with the slots; every equal screwed connection of first threaded hole has horizontal locking bolt (22) that sets up second threaded hole has all transversely been seted up on the cylinder of one side that second round bar (11) are located the slot, and every the equal screwed connection in second threaded hole in the inner of locking bolt (22).

6. The combined type cable automatic winding device for the power engineering as claimed in claim 1, wherein: a layer of anti-slip mat (23) is fixedly arranged on the top surface of the lower clamping plate (5) and the bottom surface of the upper clamping plate (12), and a plurality of anti-slip round blocks (24) are fixedly arranged on the bottom surface of the anti-slip mat (23) of the upper clamping plate (12) at equal intervals; four corners of the bottom surface of the bottom plate (1) are fixedly provided with movable wheels (25).