CN110477591B

CN110477591B - Painting device

Info

Publication number: CN110477591B
Application number: CN201910650322.3A
Authority: CN
Inventors: 林晓华
Original assignee: Minjiang University
Current assignee: Minjiang University
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2021-03-02
Anticipated expiration: 2039-07-18
Also published as: CN110477591A

Abstract

The painting device comprises a cylindrical screen plate, wherein a layer of brush hair covers the periphery of the cylindrical screen plate, a coaxial cylinder is arranged in the cylindrical screen plate, two ends of the periphery of the cylinder are respectively sleeved with a coaxial round box, the inner sides of the round boxes are respectively provided with an opening, the inner sides of the round boxes are respectively fixedly connected with one end corresponding to the cylindrical screen plate, a coaxial lead screw is mounted in a bearing in a reserved hole in the middle of the left end of the cylinder, the left end of the lead screw is fixedly connected with the inner wall of the left round box, and the right end of the lead screw is connected with the inner wall. When the bristles roll downwards, paint is supplemented to the lower portions of the bristles, and meanwhile, the upper paint is stopped from being supplemented, so that the situation that the paint is thrown out of the wall around pollution caused by the fact that the paint is too much on one side of the bristles far away from the wall is avoided, meanwhile, the paint supplementing speed is controlled through the rotating speed of the bristles, the faster the bristles rotate, the faster the paint supplementing speed is, and the situation that the paint is not timely supplemented and is unevenly coated is avoided.

Description

Painting device

Technical Field

The invention belongs to the field of painting tools, and particularly relates to a painting tool.

Background

At present, people generally use the rolling brush in the prior art as the brush rod is sleeved on the roller, and the brush hair is attached to the surface of the roller

Face, the brush-holder stud is fixed by the nut screw rod with the cylinder, need the round brush constantly to be stained with and get the paint vehicle when this kind of round brush is applied paint liquid, lead to the operation inconvenient, influence and apply paint efficiency, the round brush of automatic paint vehicle of going up need be equipped with paint vehicle pumping device, lead to the structure complicated, use cost increases, simultaneously because the speed of pump sending paint vehicle is fixed, need the uniform velocity mopping of mopping worker, otherwise can lead to the thickness of lacquer layer inconsistent, physical power and experience requirement to the mopping worker are higher, and adopt whole japanning when applying paint to the brush roll among the prior art, when applying paint with higher speed, because the brush roll slew velocity is too fast, the paint vehicle that the brush roll wall deviates from one side is brushed out very easily, make adjacent wall contaminated, thereby increase the cleaning cost, can't satisfy actual demand, I have invented a painting apparatus.

Disclosure of Invention

The invention provides a painting device, which is used for solving the defects in the prior art.

The invention is realized by the following technical scheme:

a painting device comprises a cylindrical screen plate, wherein a layer of brush hair covers the periphery of the cylindrical screen plate, a coaxial cylinder is arranged in the cylindrical screen plate, two ends of the periphery of the cylinder are respectively sleeved with a coaxial round box, the inner sides of the round boxes are respectively provided with an opening, the inner sides of the round boxes are respectively fixedly connected with one end corresponding to the cylindrical screen plate, a coaxial lead screw is arranged in a reserved hole in the middle of the left end of the cylinder in a bearing mode, the left end of the lead screw is fixedly connected with the inner wall of the round box on the left side, the right end of the lead screw is connected with an inner wall bearing on the right side of the cylinder, a coaxial piston is respectively movably arranged in the middle of the cylinder and is in sliding contact fit with the inner periphery of the cylinder, a threaded through hole is respectively arranged in the middle of the left side of the piston, the lead screw sequentially penetrates through the threaded through hole and is in threaded fit connection with, the periphery of the telescopic sealing fixed pipe, the inner wall of the cylinder and the corresponding outer side of the piston form a compression cavity, through holes are respectively arranged at the lower part of the left side of the piston, the central lines of the two through holes are collinear, the same first thin pipe is movably arranged in the two through holes, the inner periphery of the through holes are respectively matched with the outer periphery of the first thin pipe in a sliding contact manner, the left end of the first thin pipe is positioned at the left part inside the compression cavity at the left side, the left end of the first thin pipe is fixedly provided with a first check valve, the outer sides of the through holes are respectively fixedly provided with a first sealing ring sleeved at the outer periphery of the first thin pipe, the inner side of the first sealing ring is respectively matched with the outer periphery of the first thin pipe in a sliding contact manner, the right end of the first thin pipe penetrates through the right side wall of the cylinder and extends out of a reserved hole in the middle of the right side of the, a second check valve is fixedly installed at the left end of the second thin tube, transverse tubes are respectively embedded and installed at the top and the bottom of the cylinder, the two ends of each transverse tube are closed, the left end of the bottom side of the transverse tube at the upper side is communicated with the left part of the left compression cavity, the right end of the top side of the transverse tube at the lower side is communicated with the right part of the right compression cavity through a connecting hole, third check valves are respectively and fixedly installed at the inner sides of the connecting holes, the third check valve at the left side is located at the bottom of the left compression cavity, the third check valve at the left side is fixedly installed at the inner side of the connecting hole through an arc-shaped tube, a row of; the upper end of left support is connected to the left middle bearing of left circle box, the upper end of the middle fixed connection right branch frame on drum right side, the lower extreme of left branch frame and right branch frame is fixed mounting supporting wheel respectively, the supporting wheel axis collineation of both sides, and left branch frame and right branch frame pass through connecting rod fixed connection.

The painting device comprises a cylinder, a first sealing ring and a second sealing ring, wherein the cylinder is provided with a cylinder, the cylinder is provided with a piston, the cylinder is provided with a cylinder, the cylinder is.

According to the painting device, the supporting wheels are gears, the outer sides of the round boxes are fixedly connected with the inner sides of the coaxial ring gears respectively, the rear sides of the ring gears are provided with the strip-shaped teeth respectively, and the ring gears and the supporting wheels can be meshed and matched with the corresponding strip-shaped teeth respectively.

According to the painting device, the two ends of the periphery of the supporting wheel are respectively provided with the annular convex edges.

According to the painting device, the lower ends of the strip-shaped teeth are fixedly connected with the rear side of the top side of the same supporting plate, and universal wheels are fixedly mounted at four corners of the supporting plate respectively.

The painting device is characterized in that the universal wheel is provided with a self-locking device.

In the painting device, the left side and the right side of the cylinder are respectively provided with the air vent, and the air vent enables the interior of the outer pipe to be communicated with the outside.

The invention has the advantages that: the invention has ingenious conception, the rotation of the brush roll drives the painting device to paint the brush hair, thereby realizing the synchronization of the painting speed and the painting speed, the painting speed is higher when the painting speed is higher, the painting speed is not required to be specially adjusted, when the brush roll rolls upwards, the brush hair at the upper part is painted, and when the brush roll rolls downwards, the brush hair at the lower part is painted, thereby avoiding the situation that the paint in the brush hair at one side of the brush roll departing from the wall surface is more and thrown away, reducing the risk of pollution to the nearby wall when the painting speed is higher, improving the painting efficiency, meeting the market demand and being suitable for popularization. When the invention is used, the right ends of the first thin tube and the second thin tube are respectively fixedly connected with one end of the hose, the other end of the hose is respectively inserted into the paint vehicle of the paint bucket, the right ends of the first thin tube and the second thin tube are respectively communicated with the paint vehicle through the hose, the connecting rod is held by a hand, backward thrust is applied to the connecting rod, the rear sides of the bristles and the rear sides of the supporting wheels are abutted against the wall, meanwhile, upward or downward thrust is applied to the connecting rod, the bristles and the supporting wheels roll upwards or downwards along the wall, when the bristles and the supporting wheels roll upwards, the hairbrush drives the round box to rotate along the axis through the cylindrical screen plate, the round box on the left side drives the screw rod to rotate, the piston moves leftwards simultaneously, the compression cavity on the left side is compressed, the air in the air sequentially passes through the third one-way valve on the left side, the arc-shaped tube and the connecting, the compression cavity on the right side is stretched to form negative pressure, paint can be sucked into the compression cavity on the right side through the second check valve, the second thin tube and the corresponding hose, then bristles and the supporting wheel roll downwards, the compression cavity on the right side is compressed, the internal paint can enter the transverse tube on the lower side through the third check valve on the lower side and the connecting hole on the right side in sequence and is discharged from the sprayer on the lower side, spray can be formed to be sprayed to the inner side of the cylindrical screen plate and is absorbed by the bristles through meshes of the cylindrical screen plate, the paint is supplemented to the bristles from the lower part, meanwhile, the compression cavity on the left side is stretched to form negative pressure, the paint is sucked into the compression cavity on the left side through the first check valve, the compression cavity on the left side and the corresponding hose, when the bristles and the supporting wheel roll upwards again, the compression cavity on the left side is compressed, the internal paint enters the transverse tube, the paint is sprayed out through the spray head on the upper side to form spray mist, the spray mist is sprayed to the inner side of the cylindrical screen plate and is absorbed by the bristles through meshes of the cylindrical screen plate, the paint is supplemented to the bristles from the upper part, meanwhile, the compression cavity on the right side is stretched to form negative pressure, the paint is supplemented to the bristles from the lower part, the bristles and the supporting wheel are changed and rolled up and down continuously, the process is repeated continuously, and therefore when the bristles roll upwards, the paint is supplemented to the upper parts of the bristles, and the paint supplementation to the lower parts is stopped; when the bristles roll downwards, paint is supplemented to the lower portions of the bristles, and meanwhile, the paint supplementation of the upper portions is stopped, so that the situation that the paint is thrown out of the wall around pollution caused by the fact that the paint is too much on one side of the bristles far away from the wall is avoided, meanwhile, the paint supplementation speed is controlled through the rotating speed of the bristles, the faster the bristles rotate, the faster the paint supplementation speed is, the uneven painting caused by the fact that the paint is not supplemented timely is avoided, the slower the bristles rotate, the slower the paint supplementation speed is, and the paint waste caused by the fact that the paint is supplemented too fast when the physical strength of a constructor cannot follow up the slow paint brushing speed.

Drawings

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

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of section I of FIG. 1; fig. 3 is a partial enlarged view of ii of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 painting device comprises a cylindrical screen plate 1, wherein a layer of brush hair 22 covers the periphery of the cylindrical screen plate 1, a coaxial cylinder 2 is arranged in the cylindrical screen plate 1, two ends of the periphery of the cylinder 2 are respectively sleeved with a coaxial round box 3, the inner sides of the round boxes 3 are respectively opened, the inner sides of the round boxes 3 are respectively fixedly connected with one end corresponding to the cylindrical screen plate 1, a coaxial lead screw 4 is arranged in a reserved hole in the middle of the left end of the cylinder 2 through a bearing, the left end of the lead screw 4 is fixedly connected with the inner wall of the round box 3 on the left side, the right end of the lead screw 4 is connected with a bearing on the inner wall on the right side of the cylinder 2, a piston 5 which is respectively movably arranged on the middle part and the right part of the cylinder 2, the periphery of the piston 5 is respectively in sliding contact fit with the inner periphery of the cylinder 2, a thread through hole 6 is, the left side of a piston 5 on the left side is connected with the left side inner wall of a cylinder 2, the right side of the piston 5 on the right side is connected with the right side inner wall of the cylinder 2 through a telescopic sealing fixing tube 7, the periphery of the telescopic sealing fixing tube 7, the inner wall of the cylinder 2 and the corresponding outer side of the piston 5 form a compression cavity 8, the lower part of the left side of the piston 5 is provided with through holes 9 respectively, the central lines of the two through holes 9 are collinear, the same first thin tube 10 is movably arranged in the two through holes 9, the inner periphery of the through holes 9 is in sliding contact fit with the outer periphery of the first thin tube 10 respectively, the left end of the first thin tube 10 is positioned at the left part in the compression cavity 8 on the left side, a first check valve 11 is fixedly arranged at the left end of the first thin tube 10, a first sealing ring 12 sleeved at the outer periphery of the first thin tube 10 is, the right end of the first thin tube 10 penetrates through the right side wall of the cylinder 2 and extends out of a reserved hole in the middle of the right side round box 3, a second thin tube 13 is arranged in the reserved hole in the middle of the right side round box 3, the left end of the second thin tube 13 penetrates through the right side wall of the cylinder 2 and is positioned at the right part inside the compression cavity 8 on the right side, a second one-way valve 14 is fixedly installed at the left end of the second thin tube 13, the top and the bottom of the cylinder 2 are respectively embedded with a transverse tube 15, two ends of the transverse tube 15 are sealed, the left end of the bottom side of the transverse tube 15 on the upper side is communicated with the left part of the compression cavity 8 on the left side, the right end of the top side of the transverse tube 15 on the lower side is communicated with the right part of the compression cavity 8 on the right side through a connecting hole 16, a third one-way valve 17 is fixedly installed, a row of a plurality of spray heads 18 are uniformly and fixedly arranged on the outer side of the transverse pipe 15 respectively, and the spray heads 18 are communicated with the inside of the transverse pipe 15 respectively; the middle bearing on the left side of the round box 3 on the left side is connected with the upper end of a left support 19, the middle on the right side of the cylinder 2 is fixedly connected with the upper end of a right support 20, the lower ends of the left support 19 and the right support 20 are respectively and fixedly provided with a support wheel 21, the axes of the support wheels 21 on the two sides are collinear, and the left support 19 and the right support 20 are fixedly connected through a connecting rod 23. The invention has ingenious conception, the rotation of the brush roll drives the painting device to paint the brush hair, thereby realizing the synchronization of the painting speed and the painting speed, the painting speed is higher when the painting speed is higher, the painting speed is not required to be specially adjusted, when the brush roll rolls upwards, the brush hair at the upper part is painted, and when the brush roll rolls downwards, the brush hair at the lower part is painted, thereby avoiding the situation that the paint in the brush hair at one side of the brush roll departing from the wall surface is more and thrown away, reducing the risk of pollution to the nearby wall when the painting speed is higher, improving the painting efficiency, meeting the market demand and being suitable for popularization. When the invention is used, firstly, the right ends of the first thin tube 10 and the second thin tube 13 are respectively fixedly connected with one end of a hose, then the other end of the hose is respectively inserted into paint of a paint bucket, the right ends of the first thin tube 10 and the second thin tube 13 are respectively communicated with the paint through the hose, then a handle is used for holding the connecting rod 23, backward thrust is applied to the connecting rod 23, the rear sides of the bristles 22 and the rear side of the supporting wheel 21 are abutted against the wall, meanwhile, upward or downward thrust is applied to the connecting rod 23, the bristles 22 and the supporting wheel 21 are rolled upwards or downwards along the wall, when the bristles 22 and the supporting wheel 21 are rolled upwards, the bristles 22 drive the circular box 3 to rotate along the axis through the cylindrical screen plate 1, the circular box 3 on the left side drives the screw rod 4 to rotate, the piston 5 simultaneously moves leftwards, the compression cavity 8 on the left side is compressed, and the air inside sequentially passes through the third one-, The left connecting hole 16 enters the upper transverse pipe 15 and is sprayed out through the upper spray head 18, the right compression cavity 8 is stretched to form negative pressure, paint can be sucked into the right compression cavity 8 through the second one-way valve 14, the second thin pipe 13 and the corresponding hose, then the bristles 22 and the supporting wheel 21 roll downwards, the right compression cavity 8 is compressed, the internal paint can sequentially enter the lower transverse pipe 15 through the lower third one-way valve 17 and the right connecting hole 16 and is discharged from the lower spray head 18, the spray mist can be formed and sprayed to the inner side of the cylindrical screen plate 1 and is absorbed by the bristles 22 through the meshes of the cylindrical screen plate 1, the paint is replenished to the bristles 22 from the lower part, meanwhile, the left compression cavity 8 is stretched to form negative pressure, and the paint is sucked into the left compression cavity 8 through the first one-way valve 11, the first thin pipe 10 and the corresponding hose, when the bristles 22 and the supporting wheels 21 roll upwards again, the left compression cavity 8 is compressed, paint in the left compression cavity enters the upper transverse pipe 15 through the left third one-way valve 17, the arc-shaped pipe 29 and the left connecting hole 16 and is sprayed out through the upper spray head 18 to form spray mist, the spray mist is sprayed to the inner side of the cylindrical screen plate 1 and is absorbed by the bristles 22 through meshes of the cylindrical screen plate 1, the bristles 22 are supplemented from the upper part, the right compression cavity 8 is stretched to form negative pressure, the lower part is stopped to supplement the paint to the bristles 22, the bristles 22 and the supporting wheels 21 continuously change up and down to roll, and the process is continuously repeated, so that when the bristles 22 roll upwards, the paint is supplemented to the upper part of the bristles 22, and the paint supplementation to the lower part is stopped; when the bristles 22 roll downwards, paint is replenished to the lower portions of the bristles 22, and paint replenishment of the upper portions is stopped, so that the situation that the paint is thrown off to pollute the surrounding wall due to the fact that the paint is too much on the side, away from the wall, of the bristles 22 is avoided, meanwhile, the paint replenishing speed is controlled through the rotating speed of the bristles 22, the paint replenishing speed is higher as the bristles 22 rotate, uneven painting caused by untimely replenishing is avoided, the paint replenishing speed is lower as the bristles 22 rotate, and paint waste caused by the fact that the paint replenishing speed is too high as the physical strength of a constructor cannot keep up with the slow paint brushing speed is avoided.

Specifically, as shown in the drawing, the telescopic sealing fixing tube 7 according to the present embodiment includes an inner tube 71 sleeved on an outer periphery of the screw rod 4, inner ends of the inner tubes 71 are respectively fixedly connected to outer sides of corresponding pistons 5, outer tubes 72 are respectively sleeved on outer peripheries of the inner tubes 71, inner peripheries of the outer tubes 72 are respectively in sliding contact with and fit with outer peripheries of the corresponding inner tubes 71, outer ends of the outer tubes 72 are respectively fixedly connected to corresponding inner walls of the cylinders 2, inner ends of the outer tubes 72 are respectively fixedly mounted with second sealing rings 73 sleeved on outer peripheries of the inner tubes 71, and inner peripheries of the second sealing rings 73 are respectively in sliding contact with and fit with outer peripheries of. When the piston 5 moves outward, the inner tube 71 is inserted into the outer tube 72, the telescopic seal fixing tube 7 is shortened, and the second seal ring 73 prevents paint from entering the outer tube 72.

Specifically, as shown in the drawings, the supporting wheel 21 in this embodiment is a gear, the outer sides of the circular boxes 3 are respectively and fixedly connected to the inner sides of the coaxial ring gears 24, the rear sides of the ring gears 24 are respectively provided with a bar-shaped tooth 25, and the ring gears 24 and the supporting wheel 21 can be respectively engaged with the corresponding bar-shaped teeth 25. The strip-shaped teeth 25 are arranged on two sides of the painting area, the ring gear 24 and the supporting wheel 21 are respectively meshed with the corresponding strip-shaped teeth 25, and when the bristles 22 roll along the painting surface, the ring gear 24 and the gears roll along the corresponding strip-shaped teeth 25 respectively, so that the bristles 22 are prevented from slipping with the painting surface.

Further, as shown in the drawings, the two ends of the periphery of the supporting wheel 21 of the present embodiment are respectively provided with an annular convex edge 30. The annular convex edge 30 has a guiding function, the strip-shaped teeth 25 are clamped between the two adjacent annular convex edges 30, left and right deviation between the gear and the strip-shaped teeth 25 can be avoided, and therefore painting of the brush bristles 22 can be more regular.

Furthermore, as shown in the figure, the lower end of the strip-shaped teeth 25 of the present embodiment is fixedly connected to the rear side of the top side of the same supporting plate 26, and the universal wheels 27 are fixedly mounted at four corners of the supporting plate 26. The backup pad 26 makes the rigidity between two bar teeth 25, the arrangement of the bar teeth 25 of being convenient for, and the universal wheel 27 passes through the backup pad 26 simultaneously and can drive the nimble removal of bar teeth 25, the adjustment of the bar teeth 25 position of being convenient for.

Furthermore, as shown in the drawings, the universal wheel 27 of the present embodiment is provided with a self-locking device. After the bar-shaped teeth 25 move to a proper position, the universal wheel 27 can be locked through the self-locking device, and the universal wheel 27 is prevented from freely rotating.

Further, as shown in the figure, the left side and the right side of the cylinder 2 of the present embodiment are respectively provided with air vents 28, and the air vents 28 communicate the inside of the outer tube 72 with the outside. The air pressure inside the inner tube 71 is prevented from being too high to obstruct the movement of the piston 5.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A painting implement characterized by: comprises a cylindrical screen plate (1), a layer of brush hair (22) covers the periphery of the cylindrical screen plate (1), a coaxial cylinder (2) is arranged in the cylindrical screen plate (1), two ends of the periphery of the cylinder (2) are respectively sleeved with a coaxial circular box (3), the inner side of the circular box (3) is respectively opened, the inner side of the circular box (3) is respectively fixedly connected with one end corresponding to the cylindrical screen plate (1), a coaxial lead screw (4) is arranged in a reserved hole in the middle of the left end of the cylinder (2) in a bearing way, the left end of the lead screw (4) is fixedly connected with the inner wall of the circular box (3) on the left side, the right end of the lead screw (4) is connected with the inner wall bearing on the right side of the cylinder (2), coaxial pistons (5) are respectively and movably arranged in the middle part and the right part of the cylinder (2), the periphery of the pistons (5) is respectively in sliding contact fit with the inner, the screw rod (4) sequentially penetrates through the threaded through hole (6) and is in threaded fit connection with the threaded through hole (6), the left side of the left piston (5) is connected with the left inner wall of the cylinder (2), the right side of the right piston (5) is connected with the right inner wall of the cylinder (2) through a telescopic sealing fixing pipe (7), the periphery of the telescopic sealing fixing pipe (7), the inner wall of the cylinder (2) and the corresponding outer side of the piston (5) form a compression cavity (8), through holes (9) are respectively formed in the left lower portion of the piston (5), the central lines of the two through holes (9) are collinear, the same first thin pipe (10) is movably installed in the two through holes (9), the inner periphery of the through holes (9) is in sliding contact fit with the outer periphery of the first thin pipe (10), the left end of the first thin pipe (10) is located in the left portion inside the compression cavity (8), a first check valve (11) is fixedly installed at the left end, the outer sides of the through holes (9) are fixedly provided with first sealing rings (12) sleeved on the peripheries of the first thin tubes (10) respectively, the inner sides of the first sealing rings (12) are matched with the peripheries of the first thin tubes (10) in a sliding contact mode respectively, the right ends of the first thin tubes (10) penetrate through the right side wall of the cylinder (2) and extend out of a reserved hole in the middle of the right side of the round box (3) on the right side, second thin tubes (13) are arranged in reserved holes in the middle of the right side of the round box (3) on the right side, the left ends of the second thin tubes (13) penetrate through the right side wall of the cylinder (2) and are located at the right part inside a compression cavity (8) on the right side, the left ends of the second thin tubes (13) are fixedly provided with second check valves (14), transverse tubes (15) are respectively embedded at the top and the bottom of the cylinder (2), the two ends of the transverse tubes (15) are sealed, the right end of the top side of the lower transverse pipe (15) is communicated with the right part of the right compression cavity (8) through a connecting hole (16), a third one-way valve (17) is fixedly mounted on the inner side of the connecting hole (16), the third one-way valve (17) on the left side is located at the bottom of the left compression cavity (8), the third one-way valve (17) on the left side is fixedly mounted on the inner side of the connecting hole (16) through an arc-shaped pipe (29), a row of a plurality of spray heads (18) are uniformly and fixedly mounted on the outer side of the transverse pipe (15), and the spray heads (18) are communicated with the inner part of the transverse; the upper end of a left support (19) is connected with a middle bearing on the left side of a round box (3) on the left side, the upper end of a right support (20) is fixedly connected with the middle of the right side of a cylinder (2), supporting wheels (21) are respectively and fixedly installed at the lower ends of the left support (19) and the right support (20), the axes of the supporting wheels (21) on the two sides are collinear, and the left support (19) and the right support (20) are fixedly connected through a connecting rod (23).

2. A painting implement according to claim 1, characterised in that: the telescopic sealing fixing pipe (7) comprises an inner pipe (71) sleeved on the periphery of the screw rod (4), the inner end of the inner pipe (71) is fixedly connected with the outer side of the corresponding piston (5) respectively, the outer periphery of the inner pipe (71) is sleeved with an outer pipe (72) respectively, the inner periphery of the outer pipe (72) is matched with the outer periphery of the corresponding inner pipe (71) in a sliding contact mode, the outer end of the outer pipe (72) is fixedly connected with the inner wall corresponding to the cylinder (2) respectively, the inner end of the outer pipe (72) is fixedly installed with a second sealing ring (73) sleeved on the outer periphery of the inner pipe (71) respectively, and the inner periphery of the second sealing ring (73) is matched with the outer periphery of the inner.

3. A painting implement according to claim 1, characterised in that: the supporting wheel (21) is a gear, the outer side of the round box (3) is fixedly connected with the inner side of the coaxial ring gear (24), the rear side of the ring gear (24) is provided with bar teeth (25), and the ring gear (24) and the supporting wheel (21) can be meshed with the corresponding bar teeth (25) respectively.

4. A painting implement according to claim 3, characterised in that: two ends of the periphery of the supporting wheel (21) are respectively provided with an annular convex edge (30).

5. A painting implement according to claim 3, characterised in that: the lower end of the strip-shaped tooth (25) is fixedly connected with the rear side of the top side of the same supporting plate (26), and four corners of the supporting plate (26) are respectively and fixedly provided with universal wheels (27).

6. A painting implement according to claim 5, characterised in that: the universal wheel (27) is provided with a self-locking device.

7. A painting implement according to claim 2, characterised in that: the left side and the right side of the cylinder (2) are respectively provided with an air vent (28), and the air vents (28) enable the interior of the outer tube (72) to be communicated with the outside.