Marking line sliding protection device and asphalt distribution truck using same

Abstract

The utility model discloses a marking sliding protection device and an asphalt distribution truck using the same, and relates to the technical field of machines, tools or auxiliary equipment for modifying pavement, and the marking sliding protection device comprises a spraying arm, a plurality of asphalt spraying openings are formed in the spraying arm, and the spraying arm is arranged at the tail end of a transportation tool; the sliding protection plate is used for being attached to a marked line on the ground during construction; one end of the elastic supporting assembly is hinged to the front end of the spraying arm, and the other end of the elastic supporting assembly is hinged to the top of the sliding protection plate; the elastic supporting assembly drives the sliding protection plate to abut against the surface of the pavement marking downwards through elastic force generated by elastic deformation of the elastic supporting assembly. The elastic supporting assembly continuously exerts elastic force through compression, the sliding protection plate is driven to be tightly attached to the ground marking line, the covering effect is guaranteed on a curve or a slope or a bumpy road section, sticking layer oil pollution is avoided, and self-adaptive dynamic pressing is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of machines, tools, or auxiliary equipment for paving surface finishing, and in particular to a road marking slip protection device and an asphalt distributor truck using the device. Background Technology

[0002] With the rapid development of my country's economy, the transportation industry has also flourished. Expressways play a significant role in the national economy, connecting cities and rural areas and promoting stable economic operation. As the first batch of completed expressways in my country gradually reach the end of their service life, the national road network is transitioning from a large-scale construction phase to a maintenance and management phase. Milling and repaving of asphalt pavements constitutes the largest proportion of maintenance work. This typically involves milling the old pavement for single or multiple lanes, often damaging road markings. Intact markings that meet the required standards are preserved. A crucial process in maintenance is the application of asphalt tack coat. This process inevitably contaminates existing markings or areas where new markings are to be applied. Contamination is more severe on curved sections and steep slopes, leading to a decrease in the resistance coefficient of existing markings and causing further damage. This significantly increases restoration costs, and tack coat contamination greatly reduces the quality of marking installation, making the markings prone to peeling and significantly reducing durability.

[0003] In the prior art, Chinese utility model patent application number 202221555101.1 discloses a marking protection device for simultaneous construction of a super-surface sealing layer vehicle, including a rear platform set at the rear of the vehicle body, and a crank sliding mechanism set on the top of the rear platform; the crank sliding mechanism includes a handle bracket set on the top of the rear platform, an adjustment handle set on the handle bracket, the lower end of the adjustment handle connected to one end of an adjustment rocker, the other end of the adjustment rocker connected to a slide rod, and a sliding mechanism cooperating with the slide rod set on the top of the rear platform; a crossbar is vertically set at one end of the slide rod, and several support rods are set on the crossbar, one end of the support rod is connected to one end of a swing rod, and a protective cover plate is set on the other end of the swing rod.

[0004] Existing technology relies on manual adjustment mechanisms and its own weight to adhere the protective cover, lacking corresponding clamping devices, which makes it difficult to maintain close contact with the road markings when the road surface is uneven. Utility Model Content

[0005] The technical problem this invention aims to solve is how to achieve adaptive dynamic protection of road markings during asphalt pavement maintenance and construction.

[0006] To achieve the above objectives, according to one aspect of the utility model, a road marking sliding protection device is provided, comprising: a spraying arm having a plurality of asphalt spraying nozzles thereon, the spraying arm being disposed at the rear end of a transportation vehicle; a sliding protection plate for conforming to the road markings on the ground during construction; and an elastic support assembly having one end hinged to the front end of the spraying arm and the other end hinged to the top of the sliding protection plate; wherein the elastic support assembly drives the sliding protection plate to press downward against the road marking surface through the elastic force generated by its elastic deformation.

[0007] As a preferred embodiment of the above technical solution, the elastic support assembly includes a telescopic column, a hollow column, and an elastic element. The upper end of the hollow column is hinged to the front end of the spray arm, and the lower end of the hollow column extends inward along the axis of the hollow column to form a guide cavity. The elastic element is disposed in the guide cavity. The upper end of the telescopic column extends into the guide cavity and forms an elastic pressing fit with the elastic element. The lower end of the telescopic column is hinged to the top of the sliding protection plate.

[0008] As a preferred embodiment of the above technical solution, the front end of the spraying arm is provided with an angle limiting part, the angle limiting part includes constraint wing plates and axial adjustment members symmetrically arranged on both sides of the elastic support assembly. The axial adjustment member passes through the constraint wing plates on both sides and is connected to the side wall of the elastic support assembly. By tightening the axial adjustment member, the constraint wing plates on both sides are driven to move closer to each other, so that the elastic support assembly is pressed into a preset angle.

[0009] As a preferred embodiment of the above technical solution, the inner side of the constraint wing plate is provided with an arc-shaped guide rail, and the elastic support assembly is provided with corresponding locking holes on both sides. The axial adjustment member passes through the arc-shaped guide rail and is at least partially disposed in the locking hole. The radius of curvature of the arc-shaped guide rail is consistent with at least part of the movement path of the elastic support assembly around the hinge axis.

[0010] As a preferred embodiment of the above technical solution, a locking plate is also provided on the upper end face of the spraying arm, and a limiting through hole is provided on the locking plate; when the sliding protective plate is folded upward to above the spraying arm, the locking hole and the limiting through hole are coaxially aligned, and the axial adjustment member passes through the locking plate and is at least partially provided in the locking hole to form a folded locking position.

[0011] As a preferred embodiment of the above technical solution, the lock hole penetrates through the elastic support component.

[0012] As a preferred embodiment of the above technical solution, the axial adjustment component is a fastening bolt, and the locking hole is a threaded hole that matches the external thread of the axial adjustment component.

[0013] As a preferred embodiment of the above technical solution, the sliding protection plate includes a pressing area and arc-shaped wings symmetrically distributed at both ends of the pressing area. The pressing area is a planar plate and is arranged parallel to the marking construction surface. The arc-shaped wings extend upward from both ends of the pressing area with a gradually decreasing curvature.

[0014] An asphalt distributor truck includes an asphalt distributor truck body and a road marking sliding protection device as described in any of the above technical solutions, wherein the road marking sliding protection device is disposed at the rear end of the asphalt distributor truck body.

[0015] In summary, this utility model has the following advantages:

[0016] 1. In this utility model, the elastic support component continuously applies elastic force by compressing itself, driving the sliding protection plate to closely fit the ground markings, ensuring the covering effect on curves, slopes or bumpy road sections, avoiding oil contamination, and achieving adaptive dynamic pressing.

[0017] 2. Furthermore, the angle limiting part locks the tilt angle of the elastic support assembly by constraining the wing plate and the axial adjustment component, suppressing lateral slippage and ensuring the accuracy of the marking coverage;

[0018] 3. Furthermore, the locking plate works in conjunction with the axial adjustment component to switch between working and storage modes, solving temporary storage needs and reducing space occupation.

[0019] Further or other beneficial effects will be discussed in the embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the marking sliding protection device of this utility model;

[0021] Figure 2 This is an enlarged schematic diagram of the angle limiting part;

[0022] Figure 3 This is a schematic diagram of the elastic support component structure of this utility model;

[0023] Figure 4 This is a cross-sectional view of the elastic support component of this utility model;

[0024] Figure 5 This is a schematic diagram of the folded structure of the road marking sliding protection device of this utility model;

[0025] Figure 6 This is a simplified structural diagram of the asphalt spraying vehicle of this utility model;

[0026] Among them, 1-spraying arm, 11-first pivot plate, 2-sliding protection plate, 21-overlapping area, 22-arc wing, 23-second pivot plate, 3-elastic support assembly, 31-telescopic column, 311-limiting flange, 32-cavity column, 33-elastic element, 34-locking hole, 321-guide cavity, 322-limiting part, 4-angle limiting part, 41-constraint wing plate, 42-axial adjustment element, 410-arc guide rail, 5-locking plate, 51-limiting through hole and 6-asphalt sprayer body. Detailed Implementation

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0028] The present invention will be further explained below with reference to the embodiments:

[0029] Example:

[0030] A road marking sliding protection device, referring to Figures 1 to 4The system includes a spraying arm 1, a sliding protective plate 2, and an elastic support assembly 3. The spraying arm 1 is fixedly installed at the rear end of a transportation vehicle and has several asphalt spray nozzles (not shown in the figure). The sliding protective plate 2 is used to conform to the road markings during construction. One end of the elastic support assembly 3 is hinged to the front end of the spraying arm 1, and the other end is hinged to the top of the sliding protective plate 2. Specifically, the front end of the spraying arm 1 has two first pivot plates 11, and the upper end of the elastic support assembly 3 is located between the two first pivot plates 11 and pivotally connected to the two first pivot plates 11 by a rotating pin. The top of the sliding protective plate 2 has two second pivot plates 23, and the lower end of the elastic support assembly 3 is located between the two second pivot plates 23 and pivotally connected to the two second pivot plates 23 by a rotating pin. The elastic support assembly 3 drives the sliding protective plate 2 to press downward against the road marking surface through the elastic force generated by its elastic deformation. The elastic support assembly 3 specifically includes a telescopic column 31, a cavity column 32, and an elastic element 33. The upper end of the cavity column 32 is hinged to the front end of the spray arm 1. The lower end of the cavity column 32 extends inward along the axial direction of the cavity column 32 and has a guide cavity 321. The elastic element 33 is a compression spring and is disposed within the guide cavity 321. The upper end of the telescopic column 31 extends into the guide cavity 321 and forms an elastic pressing fit with the elastic element 33. The lower end of the telescopic column 31 is hinged to the top of the sliding protection plate 2. In addition, the top of the telescopic column 31 is provided with a limiting flange 311, and the guide cavity 321 is provided with a limiting part 322 whose contour is smaller than that of the limiting flange 311. The limiting flange 311 and the limiting part 322 cooperate to prevent the telescopic column 31 from moving excessively and falling out of the cavity column 32, ensuring that the telescopic column 31 moves within the axial directional range within the guide cavity 321.

[0031] Based on the above structural setup, the road marking sliding protection device moves with the work vehicle. During the vehicle's movement, the protective plate automatically adheres to the road marking surface to form a continuous coverage area, providing dynamic shielding and protection for the construction road marking throughout the process, effectively preventing damage to the road marking or contamination of the coating.

[0032] As a further optimization, in this embodiment, referring to Figure 1 , Figure 2 and Figure 3The spray arm 1 has an angle limiting part 4 at its front end. The angle limiting part 4 includes constraint wing plates 41 symmetrically arranged on both sides of the elastic support assembly 3 and an axial adjustment member 42. The axial adjustment member 42 passes through the constraint wing plates 41 on both sides and is connected to the side wall of the elastic support assembly 3. By tightening the axial adjustment member 42, the constraint wing plates 41 on both sides are driven to move closer to each other, so that the elastic support assembly 3 is pressed at a preset angle. Specifically, the angle limiting part 4 is clamped on the cavity column 32. The reason for adopting the above structural design is that the elastic support assembly 3 itself is only hinged to the spray arm 1, and its rotational joint degree of freedom is not restricted. The sliding protection plate 2 under the elastic support assembly 3 may slide sideways due to the elastic force, resulting in failure to cover the marking line. The above structural design restricts the rotation of the elastic support assembly 3, making the structure more stable. If the elastic support assembly 3 and the spray arm 1 are non-constrained hinged, there is a redundancy in the rotational degree of freedom. Under the action of elastic potential energy, the sliding protection plate 2 is prone to lateral slippage, resulting in inaccurate marking line coverage. As a further improvement, a multi-directional limit constraint system is constructed to effectively suppress unnecessary degrees of freedom and ensure that the sliding protection plate 2 and the marking line maintain a precise fit during movement.

[0033] An arc-shaped guide rail 410 is provided on the inner side of the constraint wing plate 41. Locking holes 34 are provided on both sides of the elastic support component 3. The axial adjustment member 42 passes through the arc-shaped guide rail 410 and is partially disposed within the locking holes 34. Furthermore, the radius of curvature of the arc-shaped guide rail 410 is consistent with at least a portion of the movement path of the elastic support component 3 around the hinge axis. Specifically, the arc-shaped guide rail 410, in conjunction with the axial adjustment member 42 and the locking holes 34, ensures that the elastic support component 3 can be locked within the range of the arc-shaped guide rail 410. In this application, the arc-shaped guide rail 410 can control the tilt angle of the elastic support component 3 to be locked by the axial adjustment member 42 within the range of 38° to 52°. The meaning of "at least a portion of the movement path is consistent" mentioned above actually refers to the fact that a portion of the movement path of the locking hole 34 is consistent with the trajectory of the arc-shaped guide rail 410.

[0034] Furthermore, in fact, the axial adjustment component 42 is a fastening bolt, and the locking hole 34 is a threaded hole that matches the external thread of the axial adjustment component 42. When the fastening bolt is engaged with the locking hole 34, the inner side of the bolt nut part is in close contact with the wall of the constraint wing plate 41, thereby causing the two constraint wing plates 41 to move closer together during the tightening process.

[0035] Additionally, in this embodiment, refer to Figure 5In order to accommodate the sliding protection plate 2 when the road marking sliding protection device is not in operation, a locking plate 5 is also provided on the upper end face of the spray arm 1. The locking plate 5 is similar to the first pivot plate 11 and the second pivot plate 23 mentioned above. There are two locking plates 5. The locking plate 5 has a limit through hole 51. When the sliding protection plate 2 is folded up to the top of the spray arm 1, or more precisely, when the sliding protection plate 2 contacts the spray arm 1, the locking hole 34 is coaxially aligned with the limit through hole 51. The axial adjustment member 42 passes through the locking plate 5 and is at least partially provided in the locking hole 34 to form a folded locking position. With the above settings, after the axial adjustment component 42 passes through the locking plate and engages with the thread in the locking hole 34, the positions of the elastic support component 3 and the sliding protection plate 2 are fixed. This is a suitable storage method for the protection device when it is not in operation. In this embodiment, the axial adjustment component 42 performs two functions, namely angle limitation and storage limitation, by passing through the arc-shaped guide rail 410 and the limiting through hole 51, which has high practical value.

[0036] In this embodiment, the locking hole 34 penetrates the elastic support component 3. Specifically, the locking hole 34 penetrates the hollow column 32, that is, the locking hole 34 is connected to the guide cavity 321. The reason for this arrangement is to provide an emergency solution for the entire structure. Because the axial adjustment component 42 of this application needs to be removed and adjusted in both working and non-working states of the overall device, it is easy to lose it. Therefore, when working outdoors, if the axial adjustment component 42 is found to be lost, a steel wire or rope can be used to pass through the guide cavity 321 and fix it in place as an emergency. Of course, this method is definitely not as effective as bolts and may even damage the structure, but it can solve many application scenarios as an emergency solution.

[0037] Of course, in the above scheme, the constraint wing plate 41 clamps the hollow column 32 of the elastic support component 3 instead of the telescopic column 31.

[0038] The sliding protection plate 2 includes a central pressure-covering area 21 and symmetrically distributed arc-shaped wings 22 at both ends. The pressure-covering area 21 is a flat plate and is arranged parallel to the marking construction surface. The arc-shaped wings 22 extend upward from both ends of the pressure-covering area 21 with a gradually decreasing curvature. This structure is designed to provide a transition area when the plate comes into contact with a protrusion on the ground during travel, so that the sliding protection plate 2 can pass over the protrusion instead of directly and rigidly contacting and damaging the plate.

[0039] Example 2:

[0040] A type of asphalt distributor truck, as shown in the reference Figure 6 It includes the asphalt sprayer vehicle body 6 and the road marking sliding protection device in Example 1, wherein the road marking sliding protection device is installed at the rear end of the asphalt sprayer vehicle body 6.

[0041] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0042] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A road marking sliding protection device, characterized in that, include: A spraying arm (1) is provided with several asphalt spraying nozzles, and the spraying arm (1) is located at the rear end of the transportation vehicle. Sliding protective plate (2) is used to fit the markings on the ground during construction; The elastic support assembly (3) is hinged at one end to the front end of the spray arm (1) and at the other end to the top of the sliding protection plate (2); The elastic support component (3) drives the sliding protection plate (2) to press downward against the road marking surface through the elastic force generated by its elastic deformation.

2. The marking sliding protection device according to claim 1, characterized in that: The elastic support assembly (3) includes a telescopic column (31), a cavity column (32), and an elastic element (33). The upper end of the cavity column (32) is hinged to the front end of the spray arm (1). The lower end of the cavity column (32) extends inward along the axis of the cavity column (32) and has a guide cavity (321). The elastic element (33) is disposed in the guide cavity (321). The upper end of the telescopic column (31) extends into the guide cavity (321) and forms an elastic pressing fit with the elastic element (33). The lower end of the telescopic column (31) is hinged to the top of the sliding protection plate (2).

3. The marking sliding protection device according to claim 1, characterized in that: The spray arm (1) has an angle limiting part (4) at its front end. The angle limiting part (4) includes constraint wing plates (41) and axial adjustment members (42) symmetrically arranged on both sides of the elastic support assembly (3). The axial adjustment members (42) pass through the constraint wing plates on both sides and are connected to the side wall of the elastic support assembly (3). By tightening the axial adjustment members (42), the constraint wing plates (41) on both sides are driven to move closer to each other, so that the elastic support assembly (3) is pressed at a preset angle.

4. A marking slip protection device according to claim 3, characterized in that: The inner side of the constraint wing plate (41) is provided with an arc-shaped guide rail (410), and the elastic support assembly (3) is provided with corresponding lock holes (34) on both sides. The axial adjustment member (42) passes through the arc-shaped guide rail (410) and is at least partially located in the lock hole (34). The radius of curvature of the arc-shaped guide rail (410) is consistent with at least part of the movement path of the elastic support assembly (3) around the hinge axis.

5. A marking slip protection device according to claim 4, characterized in that: The upper end face of the spray arm (1) is also provided with a locking plate (5), and a limiting through hole (51) is provided on the locking plate (5); when the sliding protection plate (2) is folded up above the spray arm (1), the locking hole (34) is coaxially aligned with the limiting through hole (51), and the axial adjustment member (42) passes through the locking plate (5) and is at least partially provided in the locking hole (34) to form a folding position lock.

6. A marking slip protection device according to claim 4, characterized in that: The keyhole (34) penetrates the elastic support assembly (3).

7. A marking slip protection device according to claim 4 or 5, characterized in that, The axial adjustment component (42) is a fastening bolt, and the locking hole (34) is a threaded hole that matches the external thread of the axial adjustment component (42).

8. A marking slip protection device according to claim 1, characterized in that: The sliding protection plate (2) includes a pressing area (21) and arc-shaped wings (22) symmetrically distributed at both ends of the pressing area (21). The pressing area (21) is a planar plate and is arranged parallel to the marking construction surface. The arc-shaped wings (22) extend upward from both ends of the pressing area with a gradually decreasing curvature.

9. An asphalt distributor truck, characterized in that, It includes an asphalt sprayer vehicle body (6) and a road marking sliding protection device as described in any one of claims 1-8, wherein the road marking sliding protection device is disposed at the rear end of the asphalt sprayer vehicle body (6).

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