CN113481779A - Leveling device for road surface and working vehicle - Google Patents

Abstract

The invention provides a leveling device for a road surface and an operation vehicle, wherein the leveling device comprises an installation frame, a leveling component and a dispersing component; the mounting frame is used for connecting an external component; the scraping component is connected to the mounting frame, the scraping component and the road surface are arranged at intervals, and the height of the scraping component is adjustable; the dispersing assembly comprises a mounting frame and a dispersing piece, the mounting frame is connected to the mounting frame, the dispersing piece is rotatably connected to the mounting frame, and the rotating axis of the dispersing piece is perpendicular to the road surface; along leveling device's direction of movement, dispersion subassembly is located the front side of strickleing off the subassembly. In the leveling device of this embodiment, be provided with mobilizable subassembly and the dispersion subassembly of strickleing off on the installation frame, through strickleing off the cooperation of subassembly and dispersion subassembly, can improve leveling device's operation quality and operating efficiency, have the controllability simultaneously to make leveling device can be applicable to different road surface structures, excellent in use effect.

Description

Leveling device for road surface and working vehicle

Technical Field

The invention relates to the technical field of highway construction, in particular to a leveling device for a road surface and an operation vehicle.

Background

The roadbed is the foundation of the road surface, the firm and stable roadbed provides important guarantee for the road surface structure to bear the load action of the automobile for a long time, the roadbed of the highway is compacted, the original structure of the engineering filled soil is destroyed after excavation and transportation, a plurality of pores are left among soil masses, uneven or overlarge settlement, collapse and sliding can occur under the load action, so the roadbed filled soil must be leveled and compacted, the leveling method is manual filling, and then the compaction machine is used for compacting.

In current road surface construction operation, there is following shortcoming when solving the road bed and leveling the problem, operation vehicle's harrow shape sieve and push pedal relative position are fixed, can't adjust sieve and push pedal according to the condition on road surface and the state of stacking of material, and in the during operation, the position that the road surface is undulant can follow equipment advancing direction and control the transform, and then to leveling during operation in advance at harrow shape sieve, can cause the flattening effect unsatisfactory to the flattening to the road surface causes the influence.

Therefore, there is a need for improvement in view of the above problems to change the present situation.

Disclosure of Invention

The invention provides a leveling device for a road surface and an operation vehicle, which are used for solving the problem of poor using effect of the traditional operation vehicle.

The invention proposes a levelling device for a road surface, comprising:

a mounting frame for connecting an external member;

the scraping component is connected to the mounting frame, the scraping component and the road surface are arranged at intervals, and the height of the scraping component is adjustable; and

the dispersing assembly comprises a mounting frame and a dispersing piece, the mounting frame is connected to the mounting frame, the dispersing piece is rotatably connected to the mounting frame, and the rotation axis of the dispersing piece is perpendicular to the road surface; along leveling device's direction of movement, dispersion subassembly is located the front side of strickleing off the subassembly.

According to one embodiment of the invention, the scraping assembly comprises a scraping mechanism and a first lifting mechanism, the scraping mechanism is movably arranged relative to the mounting frame, and the first lifting mechanism is used for driving the scraping mechanism to move towards a direction close to or far away from the road surface.

According to an embodiment of the present invention, the first lifting mechanism includes a first lifting driving member and a guiding member, the guiding member is provided with a guiding groove, the strickle mechanism is at least partially movably accommodated in the guiding groove and is in sliding fit with the guiding groove, the guiding groove is used for limiting the movement of the strickle mechanism, and the first lifting driving member is connected to the strickle mechanism and is used for driving the strickle mechanism to move along the guiding groove.

According to one embodiment of the invention, the scraping mechanism comprises a moving member, a scraping plate and at least one connecting member, the moving member is in sliding fit with the guide groove, the moving member and the scraping plate are arranged at intervals, one end of the connecting member is connected to the moving member, and the other end of the connecting member is movably connected to the scraping plate.

According to one embodiment of the invention, the dispersion assembly further comprises a drive mechanism comprising a rotary drive, a drive gear and a driven gear, the drive gear being in meshing engagement with the driven gear, the rotary drive being in powered connection with the drive gear; the dispersion piece includes connecting axle, installation department and a plurality of dispersion tooth, the connecting axle connect in driven gear, the installation department connect respectively in the connecting axle with the dispersion tooth is a plurality of the dispersion tooth is followed the extending direction interval of installation department sets up.

According to an embodiment of the present invention, the dispersing assembly further includes a second elevating mechanism connected to the dispersing member and adapted to drive the dispersing member to move in a direction toward or away from the road surface, and the connecting shaft is slidably engaged with the driven gear.

According to one embodiment of the invention, the driven gear is provided with a spline groove, and the connecting shaft is provided with a spline part matched with the spline groove.

According to one embodiment of the present invention, the second lifting mechanism includes a second lifting driving member and a connecting block, one end of the connecting block is connected to the lifting driving member, and the other end of the connecting block is rotatably connected to the connecting shaft.

According to one embodiment of the invention, the mounting frame comprises a frame body and a reinforcing rod, the frame body is used for connecting an external component, two opposite ends of the reinforcing rod are respectively connected to the frame body and the external component, and an included angle is formed between the reinforcing rod and the frame body.

The present invention also provides a work vehicle comprising:

a vehicle body;

the flattening device is arranged on one side of the vehicle body and is used for flattening the road surface; and

the leveling device of any one of the above, wherein the leveling device is provided on a side of the leveling device away from the vehicle body, and is used for leveling a road surface.

The embodiment of the invention has the following beneficial effects:

when using the leveling device of this embodiment, at first be connected this device with the external component through the installation frame, this external component can be vehicle or manually drive's moving mechanism, adjust the distance of strickleing off between subassembly and the road surface according to the flattening demand on road surface, dispersion subassembly through setting up can be at the material with strickle off the subassembly and contact the preceding dispersion operation to the material, in order to guarantee to strickle off the effect, in flattening operation process, through rotatory dispersion subassembly so that it can disperse the material in the equidirectional pair of materials, thereby improve the dispersion degree of material and leveling device's dispersion effect, be convenient for strickle off the subassembly and strickle off the operation to the material.

In the leveling device of this embodiment, be provided with mobilizable subassembly and the dispersion subassembly of strickleing off on the installation frame, through strickleing off the cooperation of subassembly and dispersion subassembly, can improve leveling device's operation quality and operating efficiency, have the controllability simultaneously to make leveling device can be applicable to different road surface structures, excellent in use effect.

In the working vehicle of this embodiment, by setting the matching between the leveling device and the flattening device in the above embodiments, the working efficiency and the leveling quality of the working vehicle can be improved, and the use effect is good.

Drawings

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

Wherein:

FIG. 1 is an isometric view of a work vehicle in an embodiment of the present invention;

FIG. 2 is an isometric view of a screed apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic view of the mounting of a mounting frame and screed assembly in an embodiment of the invention;

FIG. 4 is a schematic view of the mounting of a mounting frame and a dispensing assembly in an embodiment of the invention;

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

fig. 6 is a schematic view of the mounting frame and the vehicle body in the embodiment of the invention;

in the figure:

1. a work vehicle; 10. a leveling device; 100. a mounting frame; 110. a frame body; 111. a connecting rod; 112. a support bar; 120. a reinforcing bar; 200. a strike-off assembly; 210. a strickling mechanism; 211. a moving member; 212. a connecting member; 213. scraping the plate; 220. a first lifting mechanism; 221. a first lifting drive member; 222. a guide member; 2221. a guide groove; 300. a dispersion assembly; 310. a mounting frame; 311. a rack body; 312. a base body; 320. a dispersion member; 321. a connecting shaft; 3211. a spline section; 322. an installation part; 323. dispersing teeth; 330. a drive mechanism; 331. a rotary drive member; 332. a driving gear; 333. a driven gear; 3331. a spline groove; 340. a second lifting mechanism; 341. a second lifting drive member; 342. connecting blocks; 20. a vehicle body; 30. a flattening device; 31. flattening rollers; 32. a fixing frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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.

Referring to fig. 1, an embodiment of the present invention provides a work vehicle 1 for leveling a road bed, a road surface, and the like in road work, where the work vehicle 1 includes a leveling device 10, a vehicle body 20, and a flattening device 30, where the leveling device 10 is used for leveling the road surface, the flattening device 30 is used for flattening the road surface, and the vehicle body 20 is used as a mounting carrier for mounting the leveling device 10 and the flattening device 30, and driving the work vehicle 1 to travel.

Specifically, referring to fig. 1 and 2, the leveling device 10 includes a mounting frame 100, a leveling component 200, and a dispersing component 300, wherein the mounting frame 100 is used for connecting an external member, in this embodiment, the external member may be the vehicle body 20, and in other embodiments, the external member may be a moving mechanism such as a human-powered cart; the screed assembly 200 is connected to the mounting frame 100, the screed assembly 200 is spaced apart from the road surface, and the height of the screed assembly 200 is adjustable; the dispersing assembly 300 comprises a mounting frame 310 and a dispersing member 320, wherein the mounting frame 310 is connected to the mounting frame 100, the dispersing member 320 is rotatably connected to the mounting frame 310, and the rotation axis of the dispersing member 320 is perpendicular to the road surface; the spreading assembly 300 is disposed on the front side of the screed assembly 200 in the direction of movement of the screed 10.

When using leveling device 10 of this embodiment, at first be connected this device with the external component through installation frame 100, this external component can be vehicle or manual drive's moving mechanism, the flattening demand according to the road surface is adjusted and is strickleed off the distance between subassembly 200 and the road surface, dispersion subassembly 300 through setting up can be at the material with strickle off the subassembly 200 and contact the preceding dispersion operation to the material, in order to guarantee to strickle off the effect, in flattening operation process, through rotatory dispersion subassembly 300 so that it can disperse the material in different directions, thereby improve the dispersion degree of material and leveling device 10's dispersion effect, be convenient for strickle off subassembly 200 and strickle off the operation to the material.

In the leveling device 10 of the present embodiment, the movable leveling component 200 and the movable dispersing component 300 are disposed on the mounting frame 100, and the leveling component 200 and the dispersing component 300 are matched to improve the operation quality and the operation efficiency of the leveling device 10, and have adjustability, so that the leveling device 10 can be applied to different road surface structures, and the use effect is good.

Referring to fig. 1, in the present embodiment, a flattening device 30 is disposed at one side of the vehicle body 20 and is used for flattening a road surface; the flattening device 10 is provided on a side of the flattening device 30 away from the vehicle body 20.

In the work vehicle 1 of the present embodiment, by providing the matching between the leveling device 10 and the leveling device 30 in the above embodiment, the work efficiency and the leveling quality of the work vehicle 1 can be improved, and the use effect is good.

Specifically, in the present embodiment, the flattening device 30 includes a flattening roller 31 and a fixing frame 32, the fixing frame 32 is disposed on one side of the vehicle body 20, and the flattening roller 31 is accommodated in the fixing frame 32 and is rotatably connected to the fixing frame 32.

It should be noted that, in the present embodiment, the leveling device 10 and the flattening device 30 are sequentially arranged along the moving direction of the work vehicle 1, and the leveling device 10 may be arranged at the front side of the flattening device 30 along the moving direction of the work vehicle 1, so that the road surface can be flattened by the flattening device 30 after the leveling operation is performed by the leveling device 10, thereby ensuring the leveling effect of the road surface; in another embodiment, the leveling device 10 and the flattening device 30 may be disposed at the front side and the rear side of the vehicle body 20, so that the leveling device 10 may be firstly contacted with the road surface during the operation, and the leveling operation is performed, and then the vehicle body 20 may be contacted with the road surface after the leveling operation and travel on the leveled road surface, and since the flattening device 30 is disposed at the rear side of the vehicle body 20, the vehicle body 20 may be prevented from being damaged after traveling on the road surface, and the leveling effect may be ensured.

Referring to fig. 2 and 3, in an embodiment, the screed mechanism 200 includes a screed mechanism 210 and a first lifting mechanism 220, the screed mechanism 210 is movably disposed relative to the mounting frame 100, and the first lifting mechanism 220 is configured to drive the screed mechanism 210 to move toward or away from a road surface.

In this embodiment, the first lifting mechanism 220 can drive the scraping mechanism 210 to move along a linear direction, and the distance between the scraping mechanism 210 and the road surface can be adjusted by the first lifting mechanism 220, so as to meet the design requirement of the road surface; in some embodiments, the first lifting mechanism 220 may also be configured as a spring, and the elastic force drives the leveling mechanism 210 to move toward the road surface, so that the leveling mechanism 210 is tightly attached to the road surface, thereby ensuring the leveling effect of the leveling device 10.

Further, the first lifting mechanism 220 includes a first lifting driving member 221 and a guiding member 222, the guiding member 222 defines a guiding groove 2221, at least a portion of the strickling mechanism 210 is movably received in the guiding groove 2221 and is in sliding fit with the guiding groove 2221, the guiding groove 2221 is used for limiting the movement of the strickling mechanism 210, and the first lifting driving member 221 is connected to the strickling mechanism 210 and is used for driving the strickling mechanism 210 to move along the guiding groove 2221.

When the leveling device 10 of the present embodiment is used, the leveling mechanism 210 can slide smoothly under the guiding action of the guiding groove 2221, as shown in fig. 3, in the present embodiment, one side opening of the guiding groove 2221 is substantially a closed rectangle, and after the leveling mechanism 210 moves to the limit position, the inner wall of the guiding groove 2221 can abut against the leveling mechanism 210 and limit the movement of the leveling mechanism 210, so the structure is simple, and the using effect is good; when the cross section of the guide groove 2221 is polygonal (e.g., rectangular, trapezoidal, etc.), the striking mechanism 210 may be guided by the guide groove 2221, so that the striking mechanism 210 has only a freedom of movement in the vertical direction, thereby preventing the striking mechanism 210 from deflecting during the lifting process.

Specifically, the first lifting driver 221 may adopt a linear driver such as an air cylinder, a hydraulic cylinder, an electric push rod, etc. as a power element to achieve the effect of driving the movement of the strike mechanism 210, and may adjust the corresponding distance under the control of the controller. In another embodiment, the first lifting/lowering driver 221 may also be a rotary driver, and a lead screw is connected to the first lifting/lowering driver 221, and the scraping mechanism 210 is connected to the lead screw through a slider, so that when the first lifting/lowering driver 221 drives the lead screw to rotate, the function of driving the scraping mechanism 210 to move in a linear direction can be achieved, and the sliding is smooth.

In other embodiments, the first lifting mechanism 220 may also be configured without the first lifting driving element 221, and the height of the scraping mechanism 210 is adjusted through manual operation, for example, the height of the scraping mechanism 210 is adjusted and fixed through a limiting pin, a limiting screw, and other structures, and the structure is simple and the using effect is good.

Specifically, in this embodiment, the strike-off mechanism 210 includes a moving member 211, a strike-off plate 213 and at least one connecting member 212, the moving member 211 is slidably engaged with the guiding groove 2221, the moving member 211 and the strike-off plate 213 are disposed at an interval, one end of the connecting member 212 is connected to the moving member 211, and the other end of the connecting member 212 is movably connected to the strike-off plate 213.

When the striking-off mechanism 210 of the present embodiment is assembled, the connecting member 212 is first connected to the moving member 211, specifically, the moving member 211 and the connecting member 212 may be connected by welding, screwing, inserting, riveting, etc., and then the striking-off plate 213 is connected to one end of the connecting member 212 far away from the moving member 211, and the striking-off plate 213 is fixed, and the moving member 211 may smoothly slide on the guide 222 by being matched with the guide groove 2221.

In another embodiment, one end of the connecting member 212, which is far away from the moving member 211, is rotatably connected to the leveling plate 213, and the number of the first lifting driving members 221 is plural, and the plural first lifting driving members 221 are spaced and uniformly arranged along the extending direction of the moving member 211, when the leveling assembly 200 of this embodiment is used, the plural first lifting driving members 221 can drive the moving member 211 to move different distances along the vertical direction, so that an included angle exists between the leveling plate 213 and the road surface, and thus the road surface can be leveled into an inclined state, so that the leveling device 10 can meet different leveling requirements, and the use effect is good.

When the plurality of connecting members 212 are provided, the plurality of connecting members 212 are uniformly and alternately provided along the extending direction of the moving member 211; it is understood that by providing a plurality of connecting members 212 to connect the screed plate 213, the overall strength of the screed mechanism 210 can be increased to prevent the screed plate 213 from being deflected when screeding the road surface, and the durability of the screed mechanism 210 can be ensured.

Referring to fig. 2, 4 and 5, in one embodiment, the dispersing assembly 300 further includes a driving mechanism 330, the driving mechanism 330 includes a driving gear 331, a driving gear 332 and a driven gear 333, the driving gear 332 is engaged with the driven gear 333, the driving gear 332 is connected to the driving gear 331, and the driven gear 333 is connected to the dispersing element 320 and is used for rotating the dispersing element 320.

In this embodiment, the rotary driving member 331 can select a driving motor, a rotary cylinder, or other rotary driving elements to drive the driving gear 332 to rotate, and the driven gear 333 drives the dispersing member 320 to rotate, so as to generate an included angle between the dispersing member 320 and the mounting frame 310, thereby meeting the requirement of the operation of the leveling device 10.

Specifically, referring to fig. 4 and 5, the dispersing member 320 includes a connecting shaft 321, a mounting portion 322, and a plurality of dispersing teeth 323, the connecting shaft 321 is connected to the driven gear 333, the mounting portion 322 is connected to the connecting shaft 321 and the dispersing teeth 323, respectively, and the plurality of dispersing teeth 323 are spaced apart in an extending direction of the mounting portion 322.

With the dispersing assembly 300 of the present embodiment, when the driving gear 332 is driven to rotate by the rotating driving member 331, the connecting shaft 321 can be driven to rotate by the driven gear 333, so as to form an included angle between the mounting portion 322 and the traveling direction of the leveling device 10. By providing the plurality of dispersing teeth 323 on the mounting portion 322, the effect of dispersing the material by the dispersing unit 300 can be improved when the dispersing unit 300 comes into contact with the material on the road surface.

Further, the dispersing assembly 300 further includes a second lifting mechanism 340, the second lifting mechanism 340 is connected to the dispersing member 320 and is used for driving the dispersing member 320 to move towards or away from the road surface, and the connecting shaft 321 is in sliding fit with the driven gear 333.

The dispersing teeth 323 can be driven to move closer to or away from the road surface by providing the second elevating mechanism 340 connected to the dispersing member 320.

Referring to fig. 5, in the present embodiment, the driven gear 333 is provided with a spline groove 3331, and the connecting shaft 321 is provided with a spline portion 3211 engaged with the spline groove 3331.

From this setting, under the prerequisite that driven gear 333 can drive connecting axle 321, connecting axle 321 can also be along driven gear 333's axial displacement to realize dispersion member 320's raising and lowering functions, compact structure, be convenient for installation and arrangement, excellent in use effect.

Specifically, the second lifting mechanism 340 includes a second lifting driving member 341 and a connection block 342, one end of the connection block 342 is connected to the lifting driving member, and the other end of the connection block 342 is rotatably connected to the connection shaft 321.

In this embodiment, the second lifting driving member 341 is connected to the connecting shaft 321 through the connecting block 342, and when the second lifting driving member 341 and/or the connecting shaft 321 are worn, the connecting shaft 321 can be connected to the second lifting driving member 341 by only replacing the connecting block 342, and the second lifting mechanism 340 or the dispersing member 320 does not need to be replaced, so that the use cost is reduced.

As shown in fig. 2 to 4, in the present embodiment, the dispersing assembly 300 is provided with a plurality of groups of dispersing members 320, a driving mechanism 330 and a second lifting mechanism 340, and the dispersing members 320, the driving mechanism 330 and the second lifting mechanism 340 in each group are connected to each other, and the plurality of groups of dispersing members 320 are arranged in sequence along the extending direction of the mounting frame 310.

From this setting, when leveling device 10 carries out the flattening operation to the road surface, multiunit dispersion piece 320 can cover the road surface on road surface width direction to guarantee the dispersion effect of material, and also can realize independent control between each group's actuating mechanism 330 and the second elevating system 340, so that leveling device 10 has multi-functional flattening function.

Further, referring to fig. 2 and 6, the mounting frame 100 includes a frame body 110 and a reinforcing rod 120, the frame body 110 is used for connecting an external member, opposite ends of the reinforcing rod 120 are respectively connected to the frame body 110 and the external member, and an included angle is formed between the reinforcing rod 120 and the frame body 110.

In the present embodiment, the frame body 110 and the reinforcing bar 120 form a stable structure of a triangle therebetween after being connected with the vehicle body 20, so as to improve the overall strength of the mounting frame 100.

Specifically, in the present embodiment, the frame body 110 includes at least two connecting rods 111 and at least two supporting rods 112, wherein the two connecting rods 111 are disposed in parallel, the supporting rods 112 are respectively connected to the two connecting rods 111 to form a rectangular frame structure, one of the supporting rods 112 is used for connecting the first lifting mechanism 220 of the strickle assembly 200, and the other supporting rod 112 is used for connecting the second lifting mechanism 340 of the dispersing assembly 300.

Referring to fig. 6, the mounting block 310 includes a frame body 311 and a base body 312, the base body 312 and the frame body 311 are spaced apart from each other, the driving gear 332 and the mounting block 310 are relatively rotatably disposed and accommodated in a space between the frame body 311 and the base body 312, and the second lifting driving member 341 is connected to the base body 312 and located on a side of the base body 312 away from the driving gear 332, so that the second lifting mechanism 340 has a more compact structure as a whole; the holder body 312 and the holder body 311 may be connected by welding, screwing, riveting, or the like, for example.

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 (10)

1. A screed apparatus for a roadway comprising:

a mounting frame for connecting an external member;

the scraping component is connected to the mounting frame, the scraping component and the road surface are arranged at intervals, and the height of the scraping component is adjustable; and

the dispersing assembly comprises a mounting frame and a dispersing piece, the mounting frame is connected to the mounting frame, the dispersing piece is rotatably connected to the mounting frame, and the rotation axis of the dispersing piece is perpendicular to the road surface; along leveling device's direction of movement, dispersion subassembly is located the front side of strickleing off the subassembly.

2. The screeding device of claim 1, wherein said screeding assembly includes a screeding mechanism and a first lifting mechanism, said screeding mechanism being movably disposed relative to said mounting frame, said first lifting mechanism being configured to drive said screeding mechanism in a direction toward or away from said roadway.

3. The screeding device of claim 2, wherein said first elevating mechanism comprises a first elevating driving member and a guiding member, said guiding member defines a guiding slot, said screeding mechanism is at least partially movably received in said guiding slot and slidably engaged with said guiding slot, said guiding slot is configured to limit the movement of said screeding mechanism, and said first elevating driving member is connected to said screeding mechanism and configured to drive said screeding mechanism to move along said guiding slot.

4. The screeding device for road surface according to claim 3, wherein said screeding mechanism comprises a moving member, a screeding plate and at least one connecting member, said moving member is slidably engaged with said guiding groove, said moving member and said screeding plate are spaced apart, one end of said connecting member is connected to said moving member, and the other end of said connecting member is movably connected to said screeding plate.

5. The screeding device for roadway surfaces of claim 1, wherein said spreader assembly further comprises a drive mechanism, said drive mechanism including a rotary drive member, a drive gear and a driven gear, said drive gear being in meshing engagement with said driven gear, said rotary drive member being in powered connection with said drive gear; the dispersion piece includes connecting axle, installation department and a plurality of dispersion tooth, the connecting axle connect in driven gear, the installation department connect respectively in the connecting axle with the dispersion tooth is a plurality of the dispersion tooth is followed the extending direction interval of installation department sets up.

6. The screeding device for road surfaces of claim 5, wherein said dispersion assembly further comprises a second elevating mechanism connected to said dispersion member and adapted to drive said dispersion member to move toward or away from said road surface, said connecting shaft being in sliding engagement with said driven gear.

7. The screeding device for road surface as claimed in claim 6, wherein said driven gear is formed with spline grooves, and said connecting shaft is formed with spline portions fitted with said spline grooves.

8. The screeding device for road surface according to claim 6, wherein said second elevating mechanism comprises a second elevating driving member and a connecting block, one end of said connecting block is connected to said elevating driving member, and the other end of said connecting block is rotatably connected to said connecting shaft.

9. The screeding device for road surfaces as claimed in claim 1, wherein said mounting frame includes a frame body for connecting to an external member and a reinforcing bar having opposite ends connected to said frame body and said external member, respectively, and having an included angle with said frame body.

10. A work vehicle, characterized by comprising:

a vehicle body;

the flattening device is arranged on one side of the vehicle body and is used for flattening the road surface; and

the screeding device of any one of claims 1-9, said screeding device being disposed on a side of said screeding device remote from said vehicle body and being adapted to level a roadway surface.

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