Road and bridge marking device

Abstract

The invention relates to the technical field of road surface treatment, in particular to a road and bridge marking device which comprises a connecting support, a fixing support, two crawler belts and a spray head. The two crawler belts are symmetrically arranged on the two sides of the fixed bracket; two rotating wheels are arranged in each crawler belt, are respectively positioned at two ends of the crawler belt and synchronously rotate along with the crawler belt; the two rotating wheels located at the same end are arranged at the two ends of a rotating shaft in a sleeving mode correspondingly. Each rotating shaft is rotatably arranged on the fixed bracket; the spray head is rotatably arranged below the fixed bracket; the spray head is provided with a long-strip-shaped nozzle which is arranged downwards, and the two ends of the nozzle extend into inner cavities of the two crawler belts correspondingly. The spray head is configured to adjust the rotation angle of the spray head according to the advancing speed of the crawler belts, so that the thickness of the coating sprayed between the two crawler belts by the spray nozzle tends to be consistent. According to the scheme, the thickness of the coating sprayed between the two crawler belts tends to be consistent, so that the thickness uniformity of the coating is improved, and the scribing quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface treatment, and particularly to a road and bridge line marking device. Background Art

[0002] Road markings include construction projects such as highway road markings, factory area road markings, parking lot markings, underground garage markings, school road markings, and living community markings. They are marked with special road coatings for parking spaces, no-parking yellow line areas, passage areas, diversion belts, guiding arrows, etc.

[0003] The Chinese patent document with the application publication number CN222632020U discloses a road surface marking device for construction projects, including a trolley. The bottom plate of the trolley is provided with a through hole for a spray gun to pass through, and a line-aligning plate is slidably connected to the bottom of the bottom plate of the trolley left and right. In the prior art during spray marking, although the line-aligning plate can define the spray boundary, the paint is likely to accumulate and drip on the vertically arranged line-aligning plate, resulting in uneven edges of the marking, affecting the quality and aesthetics of the marking. In addition, due to the complexity of the road surface conditions and the diversity of the driving methods used, the moving speed of the trolley is not constant, and it is difficult to control the thickness of the sprayed marking, easily resulting in the problem of uneven marking thickness and affecting the marking quality. Summary of the Invention

[0004] The purpose of the present invention is to improve the quality of line marking.

[0005] In particular, the present invention provides a road and bridge line marking device, including: a connecting bracket for externally connecting a driving device; a fixed bracket fixedly arranged below the connecting bracket; two crawlers symmetrically arranged on both sides of the fixed bracket; two rotating wheels are arranged in each crawler, and the two rotating wheels are respectively located at both ends of the crawler and rotate synchronously with the crawler; the two rotating wheels at the same end are respectively sleeved on both ends of a rotating shaft; each rotating shaft is rotatably arranged on the fixed bracket; a nozzle rotatably arranged below the fixed bracket; the nozzle has a long strip-shaped spray opening arranged downward, and both ends of the spray opening respectively extend into the inner cavities of the two crawlers; the nozzle is configured to adjust its own rotation angle according to the traveling speed of the crawler, so that the thickness of the paint sprayed between the two crawlers tends to be consistent.

[0006] Further, when the traveling speed of the crawler is less than or equal to a preset minimum speed, the length direction of the spray opening is perpendicular to the traveling direction of the crawler.

[0007] Further, when the traveling speed of the crawler is greater than the minimum speed, the nozzle rotates, so that the length direction of the spray opening is inclined to the traveling direction of the crawler; and the rotation angle of the nozzle is positively correlated with the traveling speed of the crawler.

[0008] Furthermore, limit posts are provided at both ends of the nozzle, which can cooperate with the fixed bracket to stop and limit the rotation angle of the nozzle.

[0009] Furthermore, at least one regulating roller is sleeved on a rotating shaft, and a housing is sleeved outside the regulating roller. An annular cavity is formed between the housing and the regulating roller, and the annular cavity is filled with liquid. A liquid outlet leading to the annular cavity is formed on the housing; a plurality of sliding grooves are provided on the regulating roller, the sliding grooves communicate with the annular cavity, and pistons are arranged in the sliding grooves; one end of the piston departing from the axis of the regulating roller is connected with a compression spring to make the piston tend to approach the axis of the regulating roller; a connecting cylinder is arranged between the nozzle and the fixed bracket, the connecting cylinder is fixedly connected with the nozzle, and an arc-shaped flow channel is formed in the connecting cylinder. A liquid inlet leading to the flow channel is formed on the connecting cylinder; a slider adapted to the flow channel is arranged on the fixed bracket, and the slider extends into the flow channel; a communicating pipe is connected between the liquid inlet and the liquid outlet.

[0010] Furthermore, ventilation holes communicating with the sliding grooves are provided on the regulating roller.

[0011] Furthermore, a chamfer is formed on the outer wall surface of the crawler belt on the side close to the fixed bracket.

[0012] Furthermore, a feed port is provided on the nozzle.

[0013] Furthermore, the distance between two rotating wheels sleeved on the same rotating shaft is adjustable.

[0014] Furthermore, a T-shaped through groove is provided on the rotating wheel, and the T-shaped through groove is arranged along the axial direction of the rotating wheel; a fastener capable of sliding along its length direction is arranged in the T-shaped through groove, and the fastener passes through the T-shaped through groove and is threadedly connected with the rotating shaft.

[0015] The beneficial effects of the present invention are as follows:

[0016] For the road and bridge line marking device of the present invention, by providing symmetrical crawler belts and inserting both ends of the nozzle into the inner cavities of the crawler belts respectively, the coating sprayed out forms a clear and distinct boundary line under the blockage of the edges of the crawler belts, thereby improving the quality and aesthetics of the line marking. In addition, by using the cooperation between the nozzle and the crawler belts, a rotatable nozzle is provided to adjust the amount of coating sprayed between the two crawler belts. The nozzle is set to adjust its own rotation angle according to the traveling speed of the crawler belts to adjust the amount of coating sprayed between the two crawler belts, so that the thickness of the coating sprayed by the nozzle between the two crawler belts tends to be consistent, thereby improving the thickness uniformity of the coating and the line marking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a road and bridge marking device according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of another angle of the road and bridge marking device according to an embodiment of the present invention; wherein, the structure of the connecting pipe is hidden;

[0020] Figure 3 is Figure 2 the axonometric sectional view at A-A in

[0021] Figure 4 is Figure 3 the schematic enlarged view of area B in

[0022] Figure 5 is a schematic structural diagram of another angle of the road and bridge marking device according to an embodiment of the present invention;

[0023] Figure 6 is Figure 5 the schematic sectional view taken along the cutting line C-C in

[0024] Figure 7 is Figure 6 the schematic enlarged view of area E in

[0025] Figure 8 is Figure 5 the schematic sectional view taken along the cutting line D-D in

[0026] Figure 9 is Figure 8 the schematic enlarged view of area F in

[0027] Wherein:

[0028] 01, road surface; 02, marking; 100, connecting bracket; 200, fixed bracket; 210, slider; 220, limiting sleeve; 300, crawler belt; 310, rotating wheel; 311, T-shaped through groove; 312, fastener; 320, rotating shaft; 321, convex platform; 330, chamfer; 400, adjusting roller; 410, housing; 411, liquid outlet; 412, cylinder body; 413, end cover; 414, connecting member; 420, annular cavity; 430, sliding groove; 440, piston; 450, compression spring; 460, vent hole; 470, limiting cylinder; 471, through hole; 500, nozzle; 510, spray port; 520, limiting column; 530, feed port; 600, connecting cylinder; 610, flow channel; 620, liquid inlet; 630, connecting pipe. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Unless otherwise clearly specified and defined, terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0032] The following refers to Figures 1 to 9 to describe a road and bridge line marking device provided by the present invention.

[0033] This embodiment provides a road and bridge line marking device. The road and bridge line marking device generally includes: a connection bracket 100, a fixed bracket 200, two crawlers 300, and a nozzle 500.

[0034] The connection bracket 100 is used to externally connect a driving device. The fixed bracket 200 is fixedly arranged below the connection bracket 100. The two crawlers 300 are symmetrically arranged on both sides of the fixed bracket 200. Each crawler 300 is provided with two rotating wheels 310 inside. The two rotating wheels 310 are respectively located at both ends of the crawler 300 and rotate synchronously with the crawler 300. The two rotating wheels 310 at the same end are respectively sleeved on both ends of a rotating shaft 320. Each rotating shaft 320 is rotatably arranged on the fixed bracket 200. The nozzle 500 is rotatably arranged below the fixed bracket 200. The nozzle 500 has a long strip-shaped spray port 510 arranged downward, and both ends of the spray port 510 respectively extend into the inner cavities of the two crawlers 300. The nozzle 500 is configured to adjust its own rotation angle according to the traveling speed of the crawler 300, so that the thickness of the paint sprayed between the two crawlers 300 tends to be consistent.

[0035] In the solution of this embodiment, symmetrical crawlers 300 are arranged on both sides of the fixed bracket 200, enabling the road and bridge line marking device to better adapt to different road conditions during travel, thereby improving the practicality. Further, both ends of the nozzle 510 are respectively inserted into the inner cavity of the crawler 300, so that the sprayed paint forms a clear boundary line under the blockage of the edge of the crawler 300, thereby improving the quality and aesthetics of the line marking.

[0036] In addition, by utilizing the cooperation of the nozzle 510 and the crawler 300, a rotatable nozzle head 500 is arranged, enabling the amount of paint sprayed between the two crawlers 300 to be adjustable. It is not only simple and delicate in structure but also low in production cost. The nozzle head 500 is set to adjust its own rotation angle according to the traveling speed of the crawler 300, and the amount of paint sprayed by the nozzle head 500 between the two crawlers 300 is adjusted, making the thickness of the paint sprayed by the nozzle 510 between the two crawlers 300 tend to be consistent, thereby improving the thickness uniformity of the paint and the line marking quality.

[0037] The crawler 300 abuts against the road surface 01 and rolls relative to the road surface 01 under the drive of the drive device. Generally, the drive device can be configured as a hand-pushed trolley or an electric trolley and is fixed through the connecting bracket 100. Driven by the hand-pushed trolley or the electric trolley, the traveling speed of the crawler 300 can generally reach 100 m / min. The rotating wheel 310 and the crawler 300 can generally be frictionally connected. In some other embodiments, the rotating wheel 310 and the crawler 300 can also be gear-connected.

[0038] As Figure 1 shown, in some embodiments, four limit sleeves 220 are arranged on the fixed bracket 200 and are respectively sleeved on two rotating shafts 320. The limit sleeve 220 abuts against the boss 321 formed at the end of the rotating shaft 320 to prevent the axial movement of the rotating shaft 320.

[0039] When the traveling speed of the crawler 300 is less than or equal to the preset minimum speed, the length direction of the nozzle 510 is perpendicular to the traveling direction of the crawler 300.

[0040] When the length direction of the nozzle 510 is perpendicular to the traveling direction of the crawler 300, the amount of paint sprayed by the nozzle 510 between the two crawlers 300 is the smallest. In the solution of this embodiment, when the traveling speed of the crawler 300 is less than or equal to the preset minimum speed, the length direction of the nozzle 510 is set to be always perpendicular to the traveling direction of the crawler 300, so that the amount of paint sprayed by the nozzle 510 between the two crawlers 300 is maintained at the minimum amount, thereby avoiding the over-thickness of the marking line 02 and ensuring the line marking quality.

[0041] In the solution of this embodiment, the minimum speed is generally preset to 30 m / min. In other embodiments, the minimum speed can be preset according to the maximum speed that the crawler 300 can reach. For example, the ratio range of the minimum speed to the maximum speed can be set between one third and one quarter.

[0042] When the traveling speed of the crawler 300 is greater than the minimum speed, the nozzle 500 rotates so that the length direction of the nozzle 510 is inclined to the traveling direction of the crawler 300 ; and the rotation angle of the nozzle 500 is positively correlated with the traveling speed of the crawler 300 .

[0043] After the spray head 500 starts to rotate, the nozzle 510 gradually becomes tilted from a state perpendicular to the traveling direction, and both ends of the nozzle 510 rotate in a direction gradually separating from the inner cavity of the track 300 , so that more paint is sprayed between the two tracks 300 .

[0044] In the solution of this embodiment, when the traveling speed of the crawler 300 is greater than the minimum speed, the nozzle 500 is set to rotate so that more paint is sprayed between the two crawlers 300, thereby avoiding the marking line 02 being too thin. The rotation angle of the nozzle 500 is set to be positively correlated with the traveling speed of the crawler 300, so that when the traveling speed of the crawler 300 is faster, the amount of paint sprayed between the crawlers 300 by the nozzle 510 is greater, thereby improving the thickness uniformity of the marking line 02 and improving the marking quality.

[0045] Limiting posts 520 are provided at both ends of the nozzle 500 , and can cooperate with the fixing bracket 200 to limit the rotation angle of the nozzle 500 .

[0046] The solution of this embodiment is to set limit columns 520 at both ends of the nozzle 500 that can cooperate with the fixed bracket 200 to stop, so that when the nozzle 500 rotates to a certain angle (preferably, it can be set to when the nozzle 510 is about to completely detach from the inner cavity of the track 300), the limit columns 520 abut against the fixed bracket 200 to prevent the nozzle 500 from further rotating, thereby ensuring that the spraying range of the nozzle 510 can completely cover the area between the two tracks 300, ensuring the width of the marking line 02, and further ensuring the marking quality.

[0047] In some preferred embodiments, the nozzle 500 can be configured to rotate just enough to make the limiting column 520 abut against the fixing bracket 200 when the traveling speed of the crawler 300 reaches the maximum speed (such as 100 m / min).

[0048] At least one adjusting roller 400 is sleeved on a rotating shaft 320. A housing 410 is sleeved outside the adjusting roller 400. An annular cavity 420 is formed between the housing 410 and the adjusting roller 400. The annular cavity 420 is filled with liquid. A liquid outlet 411 leading to the annular cavity 420 is formed on the housing 410. A plurality of chutes 430 are arranged on the adjusting roller 400. The chutes 430 communicate with the annular cavity 420, and a piston 440 is arranged in the chutes 430; One end of the piston 440 departing from the axis of the adjusting roller 400 is connected with a compression spring 450, so that the piston 440 tends to approach the axis of the adjusting roller 400.

[0049] A connecting cylinder 600 is arranged between the spray head 500 and the fixed bracket 200. The connecting cylinder 600 is fixedly connected with the spray head 500, and an arc-shaped flow channel 610 is formed in the connecting cylinder 600. A liquid inlet 620 leading to the flow channel 610 is formed on the connecting cylinder 600. A slider 210 adapted to the flow channel 610 is arranged on the fixed bracket 200. The slider 210 extends into the flow channel 610. A communicating pipe 630 is connected between the liquid inlet 620 and the liquid outlet 411.

[0050] The adjusting roller 400 is fixedly connected to the rotating shaft 320, and the adjusting roller 400 rotates synchronously with the rotating shaft 320. When the adjusting roller 400 rotates, the piston 440 is affected by centrifugal force. When the traveling speed of the crawler 300 is less than or equal to the preset minimum speed, driven by the rotating wheel 310 and the rotating shaft 320, the rotating speed of the adjusting roller 400 is relatively small, and the centrifugal force received by the piston 440 is less than the pressure of the compression spring 450. Under the pressing of the compression spring 450, the piston 440 abuts against the groove wall on the side of the chute 430 close to the rotating shaft 320 and remains stationary. When the traveling speed of the crawler 300 is greater than the preset minimum speed, the rotating speed of the adjusting roller 400 is relatively large. At this time, the centrifugal force received by the piston 440 begins to be greater than the pressure of the compression spring 450. The piston 440 begins to gradually move away from the rotating shaft 320 along the chute 430, thereby forcing the liquid in the annular cavity 420 to flow into the flow channel 610, causing the connecting cylinder 600 to rotate and driving the spray head 500 to rotate. After the rotating shaft 320 stops rotating, the centrifugal force disappears, and the piston 440 resets under the action of the compression spring 450. The liquid in the flow channel 610 is sucked back into the annular cavity 420, causing the connecting cylinder 600 to rotate in the reverse direction and driving the spray head 500 to reset. In the solution of this embodiment, the adjusting roller 400 and the housing 410 are sequentially sleeved on the rotating shaft 320 to form an annular cavity 420. A connecting cylinder 600 with an arc-shaped flow channel 610 is arranged between the spray head 500 and the fixed bracket 200. A communicating pipe 630 is arranged to communicate the annular cavity 420 and the flow channel 610 to form a sealed space. The liquid flows in the annular cavity 420, the communicating pipe 630, and the flow channel 610. When the traveling speed of the crawler 300 is greater than the minimum speed, the piston 440 approaches the housing 410 along the chute 430, so that the liquid in the annular cavity 420 is squeezed through the communicating pipe 630 towards the flow channel 610, forcing the flow channel 610 and the slider 210 to slide relative to each other. Since the slider 210 is fixedly connected to the fixed bracket 200, when the flow channel 610 slides along its arc, it drives the connecting cylinder 600 to rotate, thereby driving the spray head 500 to rotate.

[0051] Furthermore, in the solution of this embodiment, by setting the compression spring 450 and using the cooperation between the pressure of the compression spring 450 and the centrifugal force generated when the adjusting roller 400 rotates, the spray head 500 can automatically adjust the rotation angle and reset according to the traveling speed of the crawler 300. This not only effectively improves the overall thickness uniformity of the marking line 02 and enhances the scribing quality, but also has a simple and delicate structure, stable operation, and better practicality.

[0052] In some embodiments, the communicating pipe 630 can be configured as a flexible hose. The liquid filled in the annular cavity 420 can use oil liquid, which has better stability.

[0053] In some preferred embodiments, adjusting rollers 400 and a housing 410 are sleeved on both of the two rotating shafts 320, and the liquids in the two formed annular cavities 420 both lead to a flow channel 610 of a connecting cylinder 600. The two adjusting rollers 400 act together to squeeze the liquid into the flow channel 610 of the connecting cylinder 600, making the connecting cylinder 600 drive the spray head 500 to rotate more smoothly.

[0054] As Figure 2 shown, the housing 410 and the fixing bracket 200 are fixedly connected, so that when structures such as the adjusting roller 400 and the rotating shaft 320 rotate, the housing 410 remains stationary, thereby ensuring the structural stability of the communicating pipe 630. In some embodiments, the housing 410 may be composed of a cylinder body 412 and an end cover 413, and the cylinder body 412 and the end cover 413 are connected together by a connecting member 414 (such as a bolt and nut). Both the cylinder body 412 and the end cover 413 are sleeved on the outer periphery of the adjusting roller 400 and form a sealed annular cavity 420 with the adjusting roller 400.

[0055] The adjusting roller 400 is provided with air vents 460 communicating with the chute 430.

[0056] In the solution of this embodiment, air vents 460 communicating with the chute 430 are provided on the adjusting roller 400 so that the piston 440 can move along the chute 430 more smoothly without being interfered by air pressure.

[0057] In some embodiments, the adjusting roller 400 and the rotating shaft 320 may be integrally formed. A plurality of chutes 430 may be uniformly arranged in the circumferential direction of the adjusting roller 400 to improve the structural stability when the adjusting roller 400 rotates. The chute 430 may be arranged in the radial direction of the adjusting roller 400 so that the moving direction of the piston 440 is consistent with the acting direction of the centrifugal force, enabling the piston 440 to slide better along the chute 430 under the action of the centrifugal force.

[0058] As Figure 7 shown, in some embodiments, a limiting cylinder 470 is arranged between the adjusting roller 400 and the housing 410. The limiting cylinder 470 is sleeved on the outer periphery of the adjusting roller 400 and abuts against the compression spring 450 to prevent the compression spring 450 from coming out of the chute 430. A through hole 471 is formed in the area of the limiting cylinder 470 opposite to the chute 430 to communicate the chute 430 and the annular cavity 420. Among them, the size of the through hole 471 is smaller than the inner diameter of the compression spring 450.

[0059] A chamfer 330 is formed on the outer wall surface of the crawler 300 on the side close to the fixing bracket 200.

[0060] In the solution of this embodiment, by providing a chamfer 330 on the outer wall surface of the crawler 300, the outer wall surface of the crawler 300 does not directly contact the marking line 02 formed by spraying, thereby ensuring that the boundary of the marking line 02 is neatly cleaned and improving the marking quality.

[0061] A feed port 530 is provided on the spray head 500.

[0062] As Figure 8 shown, a feed port 530 is provided on the spray head 500 for conveying paint to the spray nozzle 510. The feed port 530 can generally be externally connected to a paint storage device, such as a paint storage bucket, through a pipeline.

[0063] In some preferred embodiments, the feed port 530 can be provided on the side of the spray head 500 to avoid interference between the feed port 530 and the fixed bracket 200 when the spray head 500 rotates. The feed port 530 can be provided in the middle area of the spray head 500 so that the paint can be better conveyed to each area of the spray nozzle 510 through the feed port 530, enabling the paint to be sprayed out more evenly from the spray nozzle 510, thereby improving the overall spraying effect and ensuring the marking quality.

[0064] The distance between two rotating wheels 310 sleeved on the same rotating shaft 320 is adjustable.

[0065] In the solution of this embodiment, by setting the adjustable distance between the rotating wheels 310, the road and bridge marking device can spray marking lines 02 of different widths, meet different marking requirements, and improve the practicability.

[0066] A T-shaped through groove 311 is provided on the rotating wheel 310. The T-shaped through groove 311 is arranged along the axial direction of the rotating wheel 310. A fastener 312 that can slide along its length direction is arranged in the T-shaped through groove 311. The fastener 312 passes through the T-shaped through groove 311 and is threadedly connected to the rotating shaft 320.

[0067] In the solution of this embodiment, by providing a T-shaped through groove 311 on the rotating wheel 310 and arranging the fastener 312 to pass through the T-shaped through groove 311 and be threadedly connected to the rotating shaft 320, it not only has a simple structure, low cost, and convenient adjustment, but also ensures that the rotating wheel 310 will not interfere with the crawler 300 during rotation.

[0068] In some embodiments, the fastener 312 is configured as a bolt (such as, an internal hexagonal bolt).

[0069] Combined with the above embodiments, the specific working process of the road and bridge marking device provided by the present invention is described as follows:

[0070] The crawler 300 abuts against the road surface 01 and rolls relative to the road surface 01 under the drive of the driving device. At the same time, the spray nozzle 510 sprays paint vertically downward, forming a marking line 02 between the two crawlers 300.

[0071] During the traveling process, the crawler belt 300 rotates, successively driving the rotating wheel 310, the rotating shaft 320, and the adjusting roller 400 to rotate. When the adjusting roller 400 rotates, the piston 440 in the chute 430 rotates synchronously and is affected by the centrifugal force. Under the combined action of the centrifugal force and the pressure of the compression spring 450, the piston 440 slides in the chute 430. The higher the traveling speed of the crawler belt 300, the greater the centrifugal force received by the piston 440.

[0072] During the process of increasing the traveling speed of the crawler belt 300, when the traveling speed of the crawler belt 300 is less than or equal to the minimum speed, the centrifugal force received by the piston 440 is less than the pressure of the compression spring 450, and the piston 440 remains stationary in the chute 430. The length direction of the nozzle 510 is perpendicular to the traveling direction of the crawler belt 300.

[0073] When the traveling speed of the crawler belt 300 is greater than the minimum speed, the centrifugal force received by the piston 440 is greater than the pressure of the compression spring 450. The piston 440 gradually approaches the housing 410 along the chute 430, thereby squeezing the liquid in the annular cavity 420 to flow into the flow channel 610 of the connecting cylinder 600 through the connecting pipe 630, forcing the flow channel 610 and the slider 210 to relatively slide, causing the connecting cylinder 600 to rotate, and thus driving the nozzle 500 to rotate. When the nozzle 500 rotates, the nozzle 510 gradually becomes skewed from the state perpendicular to the traveling direction of the crawler belt 300, so that more paint is sprayed between the two crawler belts 300. The amount of paint sprayed between the two crawler belts 300 per unit time by the nozzle 510 is adapted to the traveling speed of the crawler belt 300, thereby improving the thickness uniformity of the marking line 02 and enhancing the marking quality.

[0074] After the traveling speed of the crawler belt 300 increases to a certain set value (such as reaching the maximum speed), the nozzle 500 rotates until the limit post 520 abuts against the fixed bracket 200, thereby preventing the nozzle 510 from completely disengaging from the inner cavity of the crawler belt 300, ensuring that the area between the two crawler belts 300 can be coated with paint, ensuring the marking width, and enhancing the marking quality.

[0075] During the process of decreasing the traveling speed of the crawler belt 300, the centrifugal force received by the piston 440 gradually decreases. Under the pressure of the compression spring 450, the piston 440 gradually moves away from the housing 410 along the chute 430 until it abuts against the groove wall on the side of the chute 430 close to the rotating shaft 320. During the process of the piston 440 gradually moving away from the housing 410, the liquid in the slideway is sucked back into the annular cavity 420 through the connecting pipe 630, thereby driving the connecting cylinder 600 to rotate in the reverse direction and resetting the nozzle 500.

[0076] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0077] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A road and bridge marking device, characterized in that, Comprising: A connecting bracket for externally connecting a driving device; A fixing bracket fixedly arranged below the connecting bracket; Two crawlers symmetrically arranged on both sides of the fixing bracket; two rotating wheels are arranged in each crawler, and the two rotating wheels are respectively located at both ends of the crawler and rotate synchronously with the crawler; the two rotating wheels at the same end are respectively sleeved on both ends of a rotating shaft; each rotating shaft is rotatably arranged on the fixing bracket; A nozzle rotatably arranged below the fixing bracket; the nozzle has a long strip-shaped nozzle opening arranged downward, and both ends of the nozzle opening respectively extend into the inner cavities of the two crawlers; The nozzle is configured to adjust its own rotation angle according to the traveling speed of the crawler, so that the thickness of the paint sprayed between the two crawlers by the nozzle opening tends to be consistent.

2. The road and bridge line marking device according to claim 1, wherein When the traveling speed of the crawler is less than or equal to a preset minimum speed, the length direction of the nozzle opening is perpendicular to the traveling direction of the crawler.

3. The road and bridge line marking device according to claim 2, wherein When the traveling speed of the crawler is greater than the minimum speed, the nozzle rotates, so that the length direction of the nozzle opening is inclined to the traveling direction of the crawler; and the rotation angle of the nozzle is positively correlated with the traveling speed of the crawler.

4. The road and bridge line marking device according to claim 3, wherein Limit posts are arranged at both ends of the nozzle, and can be in a stop fit with the fixing bracket to limit the rotation angle of the nozzle.

5. The road and bridge line marking device according to claim 3, wherein At least one of the rotating shafts is sleeved with an adjusting roller, a housing is sleeved outside the adjusting roller, an annular cavity is formed between the housing and the adjusting roller, the annular cavity is filled with liquid, and a liquid outlet leading to the annular cavity is formed on the housing; a plurality of sliding grooves are arranged on the adjusting roller, the sliding grooves are communicated with the annular cavity, and pistons are arranged in the sliding grooves; one end of the piston departing from the axis of the adjusting roller is connected with a compression spring, so that the piston tends to approach the axis of the adjusting roller; A connecting cylinder is arranged between the nozzle and the fixing bracket, the connecting cylinder is fixedly connected with the nozzle, and an arc-shaped flow channel is formed in the connecting cylinder, and a liquid inlet leading to the flow channel is formed on the connecting cylinder; a slider adapted to the flow channel is arranged on the fixing bracket, and the slider extends into the flow channel; a communicating pipe is connected between the liquid inlet and the liquid outlet.

6. The road and bridge line marking device according to claim 5, wherein Vent holes communicated with the sliding grooves are arranged on the adjusting roller.

7. The road and bridge line marking device according to claim 1, wherein A chamfer is formed on the outer wall surface of the crawler on the side close to the fixing bracket.

8. The road and bridge line marking device according to claim 1, wherein A feed port is arranged on the nozzle.

9. The road and bridge line marking device according to claim 1, wherein The distance between two of the rotating wheels sleeved on the same rotating shaft is adjustable.

10. The road and bridge line marking device according to claim 9, characterized in that a T-shaped through groove is provided on the rotating wheel, and the T-shaped through groove is arranged along the axial direction of the rotating wheel; a fastening member that can slide along its length direction is arranged in the T-shaped through groove, and the fastening member passes through the T-shaped through groove and is threadedly connected to the rotating shaft.

Images