A telescopic front shield, telescopic screed and paving machine

Abstract

The present application relates to a kind of telescopic front baffle, telescopic screed and paver, belong to paver technical field.The telescopic front baffle includes first front baffle and second front baffle, first front baffle is hollow, second front baffle is inserted into first front baffle and can be transversely moved relative to first front baffle;First front baffle lower part has first pre-compaction surface;Second front baffle lower part has the pre-compaction ability to the second pre-compaction surface of paving material smaller than first pre-compaction surface, or does not have pre-compaction surface but has vertical surface, telescopic screed, including telescopic front baffle, paver includes telescopic front baffle;Paver includes telescopic front baffle or telescopic screed.The telescopic front baffle of the present application is conducive to controlling material level height and improving paving quality.

Description

Technical Field

[0001] This invention relates to the field of paver technology, specifically to a retractable front baffle, a retractable screed, and a paver. Background Technology

[0002] A paver typically includes a traveling mechanism, hopper, conveying device, distribution device, and screed. The traveling mechanism drives the paver forward. The hopper receives and stores paving material. The conveying device transports the paving material from the hopper to the rear of the paver and in front of the screed. The distribution device distributes the paving material from the conveying device across the entire paving width. The screed, located at the rear of the paver, is used to initially compact, smooth, and ultimately shape the paving material. Screeds typically include mechanical screeds and telescopic screeds. Mechanical screeds achieve different working widths by assembling extended sections of varying widths using fasteners. Telescopic screeds easily change the working width by extending the telescopic section of the screed laterally (perpendicular to the paver's direction of travel) relative to the base screed.

[0003] The most common telescopic screeds currently include a base screed and left and right telescopic screeds located behind the base screed and capable of moving laterally relative to it. To reduce the amount of material in front of the telescopic screed, decrease the load and deformation of the screed, and thus improve paving quality, a front baffle connected to the base screed is often installed at the front of the telescopic screed.

[0004] Patent application CN202011298200.1 discloses a telescopic screed with a first and a second front baffle. The first front baffle is hollow, and the second front baffle is inserted into the first front baffle and can move laterally relative to the first front baffle. This technical solution can achieve a larger range of paving width variation; however, there are areas that need further improvement: because the second front baffle is inserted into the first front baffle, the lower edge of the second front baffle is about one slab thickness higher than the lower edge of the first front baffle. This causes more paving material to enter the space between the second front baffle and the telescopic screed, and the paving material will accumulate and may even exceed the height of the telescopic screed section. This is not conducive to ensuring the consistency of paving quality, nor to the smoothness of the screed's extension and retraction. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a retractable front baffle, a retractable screed, and a paver that maintains consistent material level between the first front baffle, the second front baffle, and the retractable screed, ensuring consistent paving quality while ensuring smooth retraction of the screed.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a retractable front baffle, comprising a first front baffle and a second front baffle, wherein the first front baffle is hollow, and the second front baffle is inserted into the first front baffle and is capable of moving laterally relative to the first front baffle; the lower part of the first front baffle is provided with a first pre-compacted surface; the lower part of the second front baffle is provided with a second pre-compacted surface whose pre-compacting capacity for paving materials is less than that of the first pre-compacted surface; or, the lower part of the second front baffle is provided with a vertical surface.

[0008] Furthermore, both the first pre-compacted surface and the second pre-compacted surface are inclined surfaces, and the inclined surface dimension of the second pre-compacted surface is smaller than that of the first pre-compacted surface.

[0009] Furthermore, the first pre-compacted surface is an inclined surface, and the lower part of the second front baffle has a vertical surface.

[0010] Furthermore, the first front baffle includes a top plate, a first vertical plate and a second vertical plate perpendicularly connected to the top plate, and a first horizontal plate perpendicularly connected to the second vertical plate, wherein the first pre-compacted surface is connected between the first vertical plate and the first horizontal plate.

[0011] Furthermore, the angle between the first pre-compacted surface and the horizontal plane is 15° to 60°.

[0012] Preferably, the angle between the first pre-compacted surface and the horizontal plane is 45°.

[0013] Furthermore, the vertical projection height of the first pre-compacted surface is 3 to 6 times the thickness of the first horizontal plate.

[0014] Preferably, the vertical projection height of the first pre-compacted surface is 4 to 5 times the thickness of the first horizontal plate.

[0015] Furthermore, the lower part of the second front baffle is also provided with a horizontal surface that is perpendicularly connected to the vertical surface.

[0016] Secondly, the present invention also provides a telescopic ironing board, including the telescopic front baffle described in the first aspect.

[0017] Thirdly, the present invention also provides a paver, including the retractable front baffle described in the first aspect or the retractable screed described in the second aspect.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] The present invention provides a first pre-compacted surface at the lower part of the first front baffle and a second pre-compacted surface at the lower part of the second front baffle with a smaller pre-compacting capacity for the paving material than the first pre-compacted surface. Alternatively, the lower part of the second front baffle may only have a vertical surface without a pre-compacted surface. This results in more paving material (by volume) passing through the lower part of the second front baffle but with lower density, and less paving material (by volume) passing through the lower part of the first front baffle but with higher density. Consequently, the amount of paving material passing through the lower parts of the first and second front baffles is ultimately the same (by mass). This maintains a consistent material level between the first and second front baffles and the telescopic screed, which is beneficial for ensuring both the consistency of paving quality and the smoothness of the screed's telescopic movement. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0021] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0022] Figure 1 This is a front view of the retractable front baffle provided in an embodiment of the present invention;

[0023] Figure 2 This is a side view of the retractable front baffle provided in an embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional view of the retractable front baffle provided in an embodiment of the present invention;

[0025] Figure 4 This is a first front baffle side view of the retractable front baffle provided in an embodiment of the present invention;

[0026] Figure 5 This is a side view of the second front baffle of the retractable front baffle provided in an embodiment of the present invention;

[0027] Labeling explanation: 1. First front baffle; 11. First pre-compacted surface; 12. First horizontal plate; 13. First vertical plate; 14. Second vertical plate; 15. Top plate; 2. Second front baffle; 21. Vertical surface; 22. Horizontal surface. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1

[0032] like Figures 1-5 As shown, this embodiment provides a retractable front baffle, including a first front baffle 1 and a second front baffle 2. The first front baffle 1 is hollow, and the second front baffle 2 is inserted into the first front baffle 1 and can move laterally relative to the first front baffle 1. The lower part of the first front baffle 1 is provided with a first pre-compacted surface 11. The lower part of the second front baffle 2 is provided with a second pre-compacted surface whose pre-compacting capacity for the paved material is less than that of the first pre-compacted surface 11. Alternatively, the lower part of the second front baffle 2 is provided with a vertical surface 21, so that more paved material (by volume) passes through the lower part of the second front baffle 2 but is denser. The lower part of the first front baffle 1 has a smaller diameter and less paving material (by volume) passes through the lower part of the first front baffle 1, but the density is higher. This ensures that the amount of paving material passing through the lower part of the first front baffle 1 and the lower part of the second front baffle 2 is the same (by mass). This maintains the same material level between the first front baffle 1, the second front baffle 2 and the telescopic screed. When the front baffle moves forward, if the front side of the lower part of the front baffle, that is, the side in contact with the paving material, is a vertical surface, it only has a horizontal pushing effect on the paving material in front of the front baffle, and does not have a pre-compacting effect.

[0033] Preferably, both the first pre-compacted surface 11 and the second pre-compacted surface are inclined surfaces, and the inclined surface dimension of the second pre-compacted surface is smaller than that of the first pre-compacted surface 11, which allows the first front baffle 1 to have a greater pre-compacting capacity on the paved material than the second front baffle 2. Specifically, as shown in the example... Figure 2 As shown, when the angle between the inclined surfaces of the first pre-compacted surface 11 and the second pre-compacted surface and the horizontal plane is the same, the length of the inclined surface of the second pre-compacted surface is smaller than that of the first pre-compacted surface 11; or, when the projected lengths of the inclined surfaces of the first pre-compacted surface 11 and the second pre-compacted surface on the horizontal plane are the same, the projected length of the inclined surface of the second pre-compacted surface on the vertical surface 21 is smaller; or, when the projected lengths of the inclined surfaces of the first pre-compacted surface 11 and the second pre-compacted surface on the vertical surface 21 are the same, the projected length of the inclined surface of the second pre-compacted surface on the horizontal plane is smaller.

[0034] The ramp not only has a horizontal pushing effect on the paved material, but also a pre-compacting effect on the paved material. Moreover, the ramp is easy to manufacture. With the front baffle height unchanged, although the height of the material passing through the lower part of the front baffle is the same, the material passing through the front baffle with the ramp has a higher degree of compaction, that is, more material actually passes through (by mass).

[0035] As one embodiment, the first pre-compacted surface 11 and the second pre-compacted surface can be selected as arc surfaces or other non-vertical surfaces, which will also have a certain compaction effect on the paving material.

[0036] More preferably, the first pre-compacted surface 11 is an inclined surface, and the lower part of the second front baffle 2 does not have a pre-compacted surface but has a vertical surface 21, so that the pre-compacting capacity of the first front baffle 1 on the paving material is greater than that of the second front baffle 2; in addition, this method is more compact in space, making the overall front and rear dimensions of the telescopic front baffle smaller, which is very important for reducing the overall size of the telescopic screed.

[0037] like Figure 4 As shown, the first front baffle 1 includes a top plate 15, a first vertical plate 13 and a second vertical plate 14 vertically connected to the top plate 15, and a first horizontal plate 12 vertically connected to the second vertical plate 14. A first pre-compacted surface 11 is connected between the first vertical plate 13 and the first horizontal plate 12.

[0038] Specifically, through on-site paving tests, it was found that the angle between the first pre-compacted surface 11 (sloping surface) at the bottom of the front baffle and the horizontal plane is preferably 15° to 60°. At this angle, the first pre-compacted surface 11 has a better pre-compacting effect on the paving material. More preferably, when the angle between the first pre-compacted surface 11 (sloping surface) at the bottom of the front baffle and the horizontal plane is 45°, the first pre-compacted surface 11 has the best pre-compacting effect on the common paving material.

[0039] Preferably, through on-site paving tests, it was further found that when the angle between the first pre-compacted surface 11 (sloping surface) under the front baffle and the horizontal plane is 45°, if the projected height of the first pre-compacted surface 11 in the vertical direction is 3 to 6 times the thickness of the bottom plate of the first front baffle 1, the material height in front of the first front baffle 1 and the second front baffle 2 is similar, that is, the amount of paving material passing under them by mass is relatively similar; more preferably, if the projected height of the first pre-compacted surface 11 in the vertical direction is 4 to 5 times the thickness of the bottom plate of the first front baffle 1, the material height in front of the first front baffle 1 and the second front baffle 2 is similar, that is, the amount of paving material passing under them by mass is most similar.

[0040] Preferably, the lower part of the second front baffle 2 is further provided with a horizontal surface 22 that is perpendicularly connected to the vertical surface 21. Studies have found that when paving materials containing large-sized aggregates, if the lower edges of the first front baffle 1 and the second front baffle 2 are sharp, the lower edges of the first front baffle 1 and the second front baffle 2 can easily drag the large aggregates, resulting in holes in the paved surface. Providing a first horizontal plate 12 on the first front baffle 1 and a horizontal surface 22 on the second front baffle 2 helps to smooth the paved material and prevent holes from appearing on the paved surface.

[0041] Example 2

[0042] This invention also provides a telescopic ironing board equipped with the telescopic front baffle described in Embodiment 1.

[0043] Example 3

[0044] This invention also provides a paver equipped with the telescopic front baffle described in Embodiment 1 or the telescopic screed described in Embodiment 2.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A retractable front baffle, characterized in that, It includes a first front baffle (1) and a second front baffle (2), the first front baffle (1) is hollow, and the second front baffle (2) is inserted into the first front baffle (1) and can move laterally relative to the first front baffle (1); The first front baffle (1) is provided with a first pre-compacted surface (11) at the lower part. The first pre-compacted surface (11) is an inclined surface, and the angle between the first pre-compacted surface (11) and the horizontal plane is 15° to 60°. The lower part of the second front baffle (2) is provided with a second pre-compacted surface whose pre-compacting capacity for the paving material is less than that of the first pre-compacted surface (11); The second pre-compacted surface is an inclined surface, and the inclined surface dimension of the second pre-compacted surface is smaller than the inclined surface dimension of the first pre-compacted surface (11); Alternatively, the lower part of the second front baffle (2) is provided with a vertical surface (21).

2. The retractable front baffle according to claim 1, characterized in that, The first front baffle (1) includes a top plate (15), a first vertical plate (13) and a second vertical plate (14) connected vertically to the top plate (15), and a first horizontal plate (12) connected vertically to the second vertical plate (14). The first pre-compacted surface (11) is connected between the first vertical plate (13) and the first horizontal plate (12).

3. The retractable front baffle according to claim 2, characterized in that, The first pre-compacted surface (11) has an angle of 45° with the horizontal plane.

4. The retractable front baffle according to claim 3, characterized in that, The vertical projection height of the first pre-compacted surface (11) is 3 to 6 times the thickness of the first horizontal plate (12).

5. The retractable front baffle according to claim 1, characterized in that, The lower part of the second front baffle (2) is also provided with a horizontal surface (22) that is perpendicularly connected to the vertical surface (21).

6. A telescopic ironing board, characterized in that, Includes the retractable front fender as described in any one of claims 1 to 5.

7. A paver, characterized in that, Includes the retractable front panel as described in any one of claims 1 to 5 or the retractable ironing board as described in claim 6.

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