CN220738701U - Blind hole cleaning equipment - Google Patents

Abstract

A blind hole cleaning apparatus comprising: the device comprises a box body, a support frame, a moving assembly, a clamping assembly and a supply and discharge assembly, wherein the support frame is fixedly arranged at the top of the box body, and a spraying piece for spraying water to a workpiece is fixedly arranged on the support frame; the moving assembly comprises a supporting plate which is movably arranged on the supporting frame; the clamping assembly is arranged on the supporting plate and is used for clamping the workpiece, so that the clamped workpiece can be aligned with the spraying piece; the water supply and discharge assembly comprises a water supply piece for supplying water and a conveying pipe for conveying the water, one end of the conveying pipe is fixedly connected with the spray piece, and the other end of the conveying pipe is connected with the water supply piece, so that the spray piece can spray and clean blind holes in a workpiece. The cleaning effect on the inside of the blind hole of the workpiece is improved, so that the product productivity is improved.

Description

Blind hole cleaning equipment

Technical Field

The utility model relates to the field of cleaning equipment, in particular to blind hole cleaning equipment.

Background

The blind holes are conducting grooves which connect the surface layer and the inner layer without penetrating through the whole plate. Blind holes are typically located in the top and bottom surfaces of the workpiece and have a depth, and the depth of the holes typically does not exceed a certain ratio. As a method for processing a blind hole, there are usually a drilling method, a boring method, a reaming method, a broaching method, a milling method, and the like, which are all processing in a workpiece, and after the processing is completed, a lot of chips remain in the blind hole, and the blind hole needs to be cleaned.

In the related art, a method for cleaning the inside of a blind hole is generally to clean the inside of the blind hole by using an ultrasonic cleaner, and explode micro bubbles in a cleaning liquid on the surface of an object by using high-frequency vibration of ultrasonic waves, so as to remove chips in the inside of the blind hole.

However, because the aperture of the blind hole is smaller, the cleaning difficulty is larger, and the ultrasonic cleaning effect is not thorough, so that part of products also need to be manually cleaned again, and the product productivity is low and the quality is unstable.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides blind hole cleaning equipment which has the effect of improving the cleaning effect on the inside of the blind hole of the workpiece, thereby improving the production efficiency of products.

According to an embodiment of the utility model, a blind hole cleaning device comprises: a case; the support frame is fixedly arranged at the top of the box body, and a spraying piece for spraying water to the workpiece is fixedly arranged on the support frame; the moving assembly comprises a supporting plate, and the supporting plate is movably arranged on the supporting frame; the clamping assembly is arranged on the supporting plate and used for clamping the workpiece so that the clamped workpiece can be aligned with the spraying piece; the water supply and discharge assembly comprises a water supply piece for supplying water and a conveying pipe for conveying the water, one end of the conveying pipe is fixedly connected with the spray piece, and the other end of the conveying pipe is connected with the water supply piece, so that the spray piece can spray and clean blind holes in the workpiece.

According to the embodiment of the utility model, the blind hole cleaning equipment at least comprises the following beneficial effects: when the blind hole on the workpiece is required to be cleaned, the workpiece is mounted on the clamping assembly, the supporting plate on the movable assembly is driven to move so as to drive the clamping assembly to move, the spray piece is aligned with the workpiece on the clamping assembly, a water source is further provided for the water supply piece, water is conveyed to the spray piece through the conveying pipe so as to spray and clean the workpiece, the blind hole of the workpiece is internally impacted through high-pressure water, and the workpiece is replaced at the mounting position relative to the clamping assembly, so that different surfaces of the workpiece are aligned with the spray piece in sequence, and good cleaning effects on the blind holes on a plurality of surfaces of the workpiece are achieved, and the problems of incomplete ultrasonic cleaning effect, low product productivity and unstable quality are solved.

According to some embodiments of the utility model, the moving assembly further comprises a sliding rail, a sliding block and a driving piece for driving the sliding block to move, the sliding block is in sliding fit with the sliding rail, and the supporting plate is fixedly arranged on the top of the sliding block so that the supporting plate can move along with the sliding block.

Through adopting above-mentioned technical scheme, when the work piece that makes on the clamping subassembly in the operation in-process need spray the piece counterpoint, slide along the length direction of slide rail through driving piece drive slider to drive the backup pad and remove, thereby drive the clamping subassembly in the backup pad and remove, and then adjust the relative position of work piece spraying piece.

According to some embodiments of the utility model, the driving member comprises a cylinder, a piston rod of the cylinder is fixedly connected with the sliding block, and a cylinder barrel of the cylinder is fixedly arranged at the top of the box body.

Through adopting above-mentioned technical scheme, when needs provide driving capability for the slider, through the flexible between piston rod and the cylinder of cylinder to can drive the slider and slide relative slide rail, adjust the size of cylinder pressure simultaneously, more can make the slider more accurate in distance that slides.

According to some embodiments of the utility model, the clamping assembly comprises a clamping plate and a compressing piece, wherein the clamping plate is arranged along the length direction of the sliding rail, a plurality of accommodating grooves are formed in the clamping plate, the accommodating grooves are distributed at intervals along the length direction of the clamping plate, and the compressing piece is used for compressing the workpiece in the accommodating grooves.

By adopting the technical scheme, when the workpiece is required to be clamped, the workpiece is placed in the accommodating groove on the clamping plate, and the workpiece is tightly pressed in the accommodating groove by the pressing piece, so that the high-pressure water can not shake the workpiece in the cleaning process, and the cleaning quality is ensured; meanwhile, when different surfaces need to be processed, the different surfaces of the workpiece are replaced to be aligned with the spray nozzles of the spraying piece, so that the spraying piece can spray and clean the workpiece.

According to some embodiments of the utility model, the pressing member includes a hinge seat, a fixing seat, and a pressing plate, the hinge seat and the fixing seat are respectively disposed at two ends of the clamping plate, one end of the pressing plate is rotatably connected to the hinge seat, so that the pressing plate can rotate around the hinge seat to press the workpiece, and the pressing plate can be fixed with the fixing seat after pressing the workpiece.

Through adopting above-mentioned technical scheme, after the work piece holding is put in the storage tank, through winding the relative articulated seat of clamp plate to fixing base department for clamp plate and fixing base are fixed, and the clamp plate compresses tightly in the work piece, thereby has fixed the relative position of work piece for the dress splint, in order to improve abluent quality.

According to some embodiments of the utility model, the spraying piece comprises a first spray head and a second spray head, the first spray head is fixedly arranged on the supporting frame, the spray nozzle of the first spray head faces the side wall of the workpiece on the clamping plate, the second spray head is fixedly arranged on one side of the sliding rail, and the bottom of the accommodating groove is provided with a through groove in a penetrating way, so that the spray nozzle of the second spray head is aligned with the notch of the through groove, and the bottom of the workpiece can be sprayed.

Through adopting above-mentioned technical scheme, the setting of first shower nozzle and second shower nozzle for after the work piece dress splint, the nozzle of first shower nozzle counterpoint with the lateral wall of work piece, the second shower nozzle can pass the groove of wearing and spray the bottom of work piece, thereby makes a plurality of faces that can wash the work piece once, thereby has improved abluent efficiency, and then improves the efficiency of work piece production.

According to some embodiments of the utility model, the water supply member includes a water collection tank and a water pump, the water collection tank is disposed inside the tank, and the water pump is capable of conveying water of the water collection tank to the spray member through the conveying pipe.

Through adopting above-mentioned technical scheme, when spraying the piece needs water, under the drive of water pump, the water of header tank passes through the conveyer pipe and reaches first shower nozzle and second shower nozzle to spray the work piece, simultaneously through the drive of water pump, make the water that carries first shower nozzle and second shower nozzle have very big pressure, thereby spray the effect to the work piece better.

According to some embodiments of the utility model, the supply and discharge assembly further comprises a sewage tank and a guide pipe for discharging sewage, wherein a through groove is formed in the top of the tank in a penetrating mode, one end of the guide pipe is communicated with the through groove, and the other end of the guide pipe is communicated with the sewage tank.

Through adopting above-mentioned technical scheme, after the work piece sprays the washing to the spray member, sewage flows to the notch of logical groove through the box top to guide to the sewage case through the guide pipe, so that sewage is collected in the sewage case.

According to some embodiments of the utility model, the blind hole cleaning device further comprises a cover body, wherein the cover body is arranged at the top of the box body and covers the upper portion of the supporting frame.

Through adopting above-mentioned technical scheme, the cover body is used for guiding the sewage that spray piece washs the work piece production for the sputter can be guided to the box top to the sewage of cover body inner wall, and then guides to the notch department of leading to the groove and discharges through the guide pipe.

According to some embodiments of the utility model, the bottom of the box body is provided with a plurality of rollers for driving the box body to move.

Through adopting above-mentioned technical scheme for the box can correspond according to the position of work piece production facility and remove under the drive of gyro wheel, with reduced the time of sending and getting the work piece back and forth, thereby can improve machining efficiency.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a block diagram of the interior of the enclosure and the interior of the case in an embodiment of the present application;

FIG. 3 is a view showing an assembled structure of a first angle of a top of a case in an embodiment of the present application;

FIG. 4 is a diagram illustrating the assembly of the top of the case at a second angle in an embodiment of the present application;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a view showing an assembled structure of a third angle of the top of the case in the embodiment of the present application;

fig. 7 is a block diagram of a supply and exhaust assembly in an embodiment of the present application.

Reference numerals illustrate: 100. a case; 200. a support frame; 210. a base; 220. a support rod; 230. a cross bar; 240. diagonal bracing; 310. a slide rail; 320. a slide block; 330. a support plate; 331. a clearance groove; 332. a support ear; 341. a cylinder; 410. clamping plates are arranged; 411. a receiving groove; 412. penetrating a groove; 421. a hinge base; 422. a fixing seat; 4221. a plug-in groove; 4222. a plug hole; 423. a pressing plate; 4231. a plug block; 4232. a limiting hole; 430. a workpiece; 510. a first nozzle; 520. a second nozzle; 610. a delivery tube; 621. a water collection tank; 622. a water pump; 630. a guide tube; 640. a sewage tank; 650. a through groove; 660. a drain pipe; 670. a control valve; 700. a cover body; 710. a rotating plate; 800. a roller; 900. a handle.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The present application is described in further detail below in conjunction with figures 1-7.

The blind hole cleaning equipment provided by the embodiment of the utility model, referring to fig. 1 and 2, comprises a box body 100, wherein a supporting frame 200 is arranged at the top of the box body 100, and the supporting frame 200 is -shaped.

Specifically, referring to fig. 2 and 3, the reference support frame 200 includes a base 210 fixedly disposed at the top of the box 100, a support rod 220 vertically disposed on the base 210, and a cross rod 230 disposed at the top of the support rod 220, where one end of the cross rod 230 is fixedly connected to the support rod 220, and the other end is suspended. Diagonal braces 240 for supporting the cross bar 230 are provided between the cross bar 230 and the support bar 220 to strengthen the load bearing strength of the cross bar 230.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 4 and 5, a moving assembly for driving the workpiece 430 to move is provided on the support frame 200. Specifically, the moving assembly includes a sliding rail 310 disposed on the base 210, a sliding block 320 slidably matched with the sliding rail 310, a supporting plate 330 disposed on the sliding block 320, and a driving member for driving the sliding block 320 to move, where the sliding rail 310 is disposed along a length direction of the cross bar 230, the supporting plate 330 is disposed along a length direction of the sliding rail 310, the workpiece 430 can be mounted on the supporting plate 330, and the sliding block 320 is driven by the driving member to move along the length direction of the sliding rail 310, so as to drive the supporting plate 330 to move, thereby driving the workpiece 430 to move.

Referring to fig. 4 and 5, the driving member includes an air cylinder 341 for providing driving capability for the slider 320, a cylinder barrel of the air cylinder 341 is fixedly disposed at the top of the box 100, and a piston rod of the air cylinder 341 is fixedly connected to one side of the slider 320, so as to drive the slider 320 to slide relative to the sliding rail 310 through telescopic cooperation of the piston rod of the air cylinder 341 and the cylinder barrel, thereby driving the workpiece 430 on the supporting plate 330 to move.

It can be appreciated that, in some embodiments of the present utility model, referring to fig. 5, the avoidance grooves 331 are formed on two sides of the support plate 330, and the avoidance grooves 331 are formed along the width direction of the support plate 330, such that two support lugs 332 are defined by the support plate 330 opposite to the groove walls of the avoidance grooves 331, and the two support lugs 332 are respectively located on two ends of the support plate 330. The two supporting lugs 332 are provided with clamping assemblies for clamping the workpiece 430, the number of the clamping assemblies is two, and the two clamping assemblies correspond to the two avoidance grooves 331 one by one.

Specifically, referring to fig. 5, the clamping assembly includes a clamping plate 410 mounted on two support lugs 332 and a pressing member for pressing the workpiece 430 onto the clamping plate 410, where the clamping plate 410 is disposed along a length direction of the slide rail 310. The clamping plate 410 is provided with a plurality of accommodating grooves 411, the plurality of accommodating grooves 411 are distributed at intervals along the length direction of the clamping plate 410, one end of the workpiece 430 is accommodated in the accommodating groove 411, the other end of the workpiece 430 protrudes out of the accommodating groove 411, and the pressing piece can press one end of the workpiece 430 protruding out of the accommodating groove 411.

Referring to fig. 5, the pressing member includes a hinge seat 421, a fixing seat 422, and a pressing plate 423, where the hinge seat 421 and the fixing seat 422 are disposed at two ends of the clamping plate 410 in a one-to-one correspondence, and one end of the pressing plate 423 is rotatably connected to the hinge seat 421. The fixed seat 422 is provided with a plug-in slot 4221, one end of the pressing plate 423, which is far away from the hinging seat 421, is provided with a plug-in block 4231, the plug-in block 4231 is in plug-in fit with the plug-in slot 4221, the slot wall of the plug-in slot 4221 is penetrated and provided with a plug-in hole 4222, the side wall of the plug-in block 4231 is provided with a limiting hole 4232 corresponding to the plug-in hole 4222, when the plug-in block 4231 is inserted into the plug-in slot 4221, the plug-in hole 4222 is aligned with the limiting hole 4232, and the workpiece 430 is respectively inserted into the plug-in hole 4222 and the limiting hole 4232 through a bolt, so that after the workpiece 430 is accommodated in the accommodating slot 411, the plug-in block 4231 is inserted into the plug-in slot 4221 by winding the pressing plate 423 around the fixing seat 422 to fix the relative positions of the plug-in slot 4231, and the workpiece 430 is pressed on the clamping plate 410.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 5 and 6, a shower for spraying water onto the workpiece 430 is provided on the support frame 200. Specifically, the spray member includes a first spray head 510 and a second spray head 520, the first spray head 510 is fixedly disposed at the bottom of the cross bar 230, and the nozzle of the first spray head 510 is aligned with the sidewall of the workpiece 430 on the clamping plate 410. In some embodiments, nozzles are provided at both ends of the first showerhead 510 to allow the first showerhead 510 to spray the workpiece 430 on both clamp assemblies. The second spray heads 520 are fixedly arranged on one side of the sliding rail 310, the number of the second spray heads 520 is two, and the two second spray heads 520 respectively correspond to the two clamping assemblies one by one. The bottom of the accommodating groove 411 is provided with a through groove 412 in a penetrating way, so that the nozzle of the second nozzle 520 is aligned with the notch of the through groove 412, and the second nozzle 520 can spray water through the through groove 412 to spray the bottom of the workpiece 430.

It will be appreciated that in some embodiments of the utility model, referring to fig. 6 and 7, a water supply and drain assembly for delivering water to the spray member is provided within the tank 100. Specifically, the supply and discharge assembly includes a delivery pipe 610, a water supply unit for supplying water, a guide pipe 630 and a sewage tank 640, wherein one end of the delivery pipe 610 is connected with the water supply unit, the other end of the delivery pipe penetrates out of the top of the tank 100, and one end penetrating out of the top of the tank 100 is fixedly connected with the spraying unit, so that the water supply unit drives a water source to supply water for the spraying unit through the delivery pipe 610, and the first spray head 510 and the second spray head 520 spray-clean the workpiece 430.

Referring to fig. 6 and 7, the water supply member includes a water collection tank 621 and a water pump 622 for providing driving capability for the delivery pipe 610 to deliver water, the water collection tank 621 is disposed inside the tank 100, and the water pump 622 is sleeved between two sections of delivery pipes 610, so that the water of the water collection tank 621 reaches the first nozzle 510 and the second nozzle 520 through the delivery pipe 610 under the driving of the water pump 622, thereby spraying the workpiece 430.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 6 and 7, a through groove 650 is formed through the top of the tank body 100, a guiding tube 630 is disposed at the notch of the through groove 650, one end of the guiding tube 630 is sleeved at the notch of the through groove 650, the other end extends into the tank body 100, and one end extending into the tank body 100 is communicated with the sewage tank 640, so that when the spraying member sprays and cleans the workpiece 430, sewage flows to the notch of the through groove 650 through the top of the tank body 100, and is guided to the sewage tank 640 through the guiding tube 630, so that the sewage is collected in the sewage tank 640. In some embodiments, the number of the through slots 650 is plural, and the plurality of through slots 650 are distributed at intervals on the top of the box 100, and each through slot 650 is correspondingly provided with a guiding tube 630.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 6 and 7, a drain pipe 660 is provided at the bottom of the sewage tank 640, one end of the drain pipe 660 protrudes out of the bottom of the tank 100 after passing through the sewage tank 640, and one end protruding out of the tank 100 is provided with a control valve 670, so that when the sewage tank 640 is filled to be discharged, sewage is discharged through the drain pipe 660 by the control valve 670.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 1 and 7, the blind hole cleaning apparatus further includes a cover 700, wherein the cover 700 is disposed at the top of the box 100 and covers the support frame 200 to guide the sewage generated when the shower cleaning workpiece 430 is performed, so that the sewage sputtered to the inner wall of the cover 700 can be guided to the top of the box 100, further guided to the notch of the through groove 650 and discharged through the guiding tube 630. The cover 700 is provided with a visual groove for manual observation, and the visual groove penetrates through the inner surface and the outer surface of the cover 700. The notch department in visual groove is provided with the rotation board 710 that corresponds with visual groove, and the one end rotation of rotation board 710 is connected in the notch department in visual groove to rotation board 710 can overturn relative cover body 700, thereby shutoff is carried out to visual groove.

It can be appreciated that, in some embodiments of the present utility model, referring to fig. 7, a plurality of rollers 800 for driving the box 100 to move are disposed at the bottom of the box 100, so that the box 100 can correspondingly move according to the position of the workpiece 430 production device under the driving of the rollers 800, so as to reduce the time for sending and receiving the workpiece 430 back and forth, thereby improving the processing efficiency. In some embodiments, the number of rollers 800 is four, and the four rollers 800 are located at four corners of the case 100, respectively.

It will be appreciated that in some embodiments of the present utility model, referring to fig. 7, a handle 900 for manual gripping is provided on one side of the case 100, and the handle 900 is provided on the top of the case 100 for manual gripping, so that the case 100 is pushed to a desired processing place under the driving of the roller 800.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A blind hole cleaning apparatus, comprising:

a case (100);

the support frame (200), the support frame (200) is fixedly arranged at the top of the box body (100), and a spraying piece for spraying water to the workpiece (430) is fixedly arranged on the support frame (200);

the moving assembly comprises a supporting plate (330), and the supporting plate (330) is movably arranged on the supporting frame (200);

the clamping assembly is arranged on the supporting plate (330) and is used for clamping the workpiece (430) so that the clamped workpiece (430) can be aligned with the spraying piece;

the water supply and discharge assembly comprises a water supply piece for supplying water and a conveying pipe (610) for conveying the water, one end of the conveying pipe (610) is fixedly connected with the spray piece, and the other end of the conveying pipe is connected with the water supply piece, so that the spray piece can spray and clean blind holes in the workpiece (430).

2. Blind hole cleaning apparatus according to claim 1, characterized in that: the movable assembly further comprises a sliding rail (310), a sliding block (320) and a driving piece for driving the sliding block (320) to move, the sliding block (320) is in sliding fit with the sliding rail (310), and the supporting plate (330) is fixedly arranged at the top of the sliding block (320), so that the supporting plate (330) can move along with the sliding block (320).

3. Blind hole cleaning apparatus according to claim 2, characterized in that: the driving piece comprises an air cylinder (341), a piston rod of the air cylinder (341) is fixedly connected with the sliding block (320), and a cylinder barrel of the air cylinder (341) is fixedly arranged at the top of the box body (100).

4. Blind hole cleaning apparatus according to claim 2, characterized in that: the clamping assembly comprises clamping plates (410) and pressing pieces, the clamping plates (410) are arranged along the length direction of the sliding rail (310), a plurality of containing grooves (411) are formed in the clamping plates (410), the containing grooves (411) are distributed at intervals along the length direction of the clamping plates (410), and the pressing pieces are used for pressing the workpieces (430) to the containing grooves (411).

5. The blind hole cleaning apparatus of claim 4, wherein: the pressing piece comprises a hinge seat (421), a fixed seat (422) and a pressing plate (423), wherein the hinge seat (421) and the fixed seat (422) are respectively arranged at two ends of the clamping plate (410), one end of the pressing plate (423) is rotationally connected with the hinge seat (421), so that the pressing plate (423) can rotate around the hinge seat (421) to press the workpiece (430), and the pressing plate (423) can be fixed with the fixed seat (422) after the workpiece (430) is pressed.

6. The blind hole cleaning apparatus of claim 4, wherein: the spraying piece comprises a first spraying head (510) and a second spraying head (520), wherein the first spraying head (510) is fixedly arranged on the supporting frame (200), a nozzle of the first spraying head (510) faces to the side wall of the workpiece (430) on the clamping plate (410), the second spraying head (520) is fixedly arranged on one side of the sliding rail (310), a through groove (412) is formed in the bottom of the accommodating groove (411) in a penetrating mode, and the nozzle of the second spraying head (520) is aligned with a notch of the through groove (412), so that spraying can be performed on the bottom of the workpiece (430).

7. Blind hole cleaning apparatus according to claim 1, characterized in that: the water supply piece comprises a water collection tank (621) and a water pump (622), wherein the water collection tank (621) is arranged inside the tank body (100), and the water pump (622) can convey water of the water collection tank (621) to the spraying piece through the conveying pipe (610).

8. Blind hole cleaning apparatus according to claim 1, characterized in that: the water supply and discharge assembly further comprises a sewage tank (640) and a guide pipe (630) for discharging sewage, a through groove (650) is formed in the top of the tank body (100) in a penetrating mode, one end of the guide pipe (630) is communicated with the through groove (650), and the other end of the guide pipe (630) is communicated with the sewage tank (640).

9. Blind hole cleaning apparatus according to claim 1, characterized in that: the blind hole cleaning equipment further comprises a cover body (700), wherein the cover body (700) is arranged at the top of the box body (100) and covers the upper part of the supporting frame (200).

10. Blind hole cleaning apparatus according to claim 1, characterized in that: the bottom of the box body (100) is provided with a plurality of rollers (800) for driving the box body (100) to move.