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CN-117230689-B - Telescopic front baffle, telescopic screed plate and paver

CN117230689BCN 117230689 BCN117230689 BCN 117230689BCN-117230689-B

Abstract

The invention relates to a telescopic front baffle, a telescopic screed plate and a paver, and belongs to the technical field of pavers. The retractable front baffle comprises a first front baffle and a second front baffle, the first front baffle is hollow, the second front baffle is inserted into the first front baffle and can transversely move relative to the first front baffle, the lower part of the first front baffle is provided with a first precompacted surface, the lower part of the second front baffle is provided with a second precompacted surface which has smaller precompacted capacity to paving materials than the first precompacted surface, or is provided with a vertical surface without precompacted surface, the retractable screed comprises the retractable front baffle, the paver comprises the retractable front baffle, and the paver comprises the retractable front baffle or the retractable screed. The telescopic front baffle is beneficial to controlling the material level height and improving the paving quality.

Inventors

  • WANG YOUBAO
  • SUN ZHIREN
  • LI SHIHAI

Assignees

  • 徐工集团工程机械股份有限公司道路机械分公司

Dates

Publication Date
20260508
Application Date
20231031

Claims (7)

  1. 1. The telescopic front baffle is characterized by comprising a first front baffle (1) and a second front baffle (2), wherein the first front baffle (1) is hollow, and the second front baffle (2) is inserted into the first front baffle (1) and can transversely move relative to the first front baffle (1); the lower part of the first front baffle plate (1) is provided with a first pre-compaction surface (11), the first pre-compaction surface (11) is an inclined plane, and the included angle between the first pre-compaction surface (11) and the horizontal plane is 15-60 degrees; The lower part of the second front baffle plate (2) is provided with a second pre-compaction surface with smaller pre-compaction capacity on paving material than the first pre-compaction surface (11); The second pre-compacted surface is beveled and the beveled dimension of the second pre-compacted surface is smaller than the beveled dimension of the first pre-compacted surface (11); Or the lower part of the second front baffle (2) is provided with a vertical surface (21).
  2. 2. The retractable front baffle-plate according to claim 1, characterized in that said first front baffle-plate (1) comprises a top plate (15), a first riser (13) and a second riser (14) connected perpendicularly to the top plate (15) and a first horizontal plate (12) connected perpendicularly to the second riser (14), said first pre-compacted surface (11) being connected between said first riser (13) and said first horizontal plate (12).
  3. 3. A retractable front baffle-plate according to claim 2, characterized in that said first pre-compacted surface (11) is at an angle of 45 ° to the horizontal.
  4. 4. A retractable front baffle according to claim 3, characterized in that the projected height of said first pre-compacted surface (11) in the vertical direction is 3 to 6 times the thickness of the first horizontal plate (12).
  5. 5. The retractable front-baffle according to claim 1, characterized in that the lower part of the second front-baffle (2) is further provided with a horizontal surface (22) connected perpendicularly to the vertical surface (21).
  6. 6. A telescopic screed plate comprising a telescopic front baffle according to any one of claims 1 to 5.
  7. 7. A paver comprising a retractable front baffle as claimed in any one of claims 1 to 5 or a retractable screed as claimed in claim 6.

Description

Telescopic front baffle, telescopic screed plate and paver Technical Field The invention relates to the technical field of pavers, in particular to a telescopic front baffle, a telescopic screed and a paver. Background Paving machines generally comprise a travelling device, a hopper, a material conveying device, a material distributing device, a screed plate and the like, wherein the travelling device is used for driving the paving machine to advance, the hopper is used for receiving and storing paving materials, the material conveying device is used for conveying the paving materials in the hopper to the rear of the paving machine and before the screed plate, the material distributing device is used for conveying the paving materials conveyed by the material conveying device to the whole paving width, and the screed plate is positioned at the rear of the paving machine and is used for primarily compacting, screeding and finally forming the paving materials. The screed typically includes a mechanical screed that achieves different working widths by assembling elongated sections of different widths with fasteners, and a telescoping screed that conveniently changes the working width by telescoping the telescoping section screed transversely (perpendicular to the direction of spreader travel) relative to the base section screed. The most common telescopic screeds today comprise a base section screed and left and right telescopic section screeds arranged at the rear side of the base section screed and being laterally movable relative to the base section screed. In order to reduce the amount of material in front of the telescoping section screed, reduce the screed load and deflection and thereby improve the paving quality, front baffles connected to the base section screed are often provided in front of the telescoping section screed. Patent application number CN202011298200.1 discloses a telescopic screed with a first front baffle, which is hollow, and a second front baffle, which is inserted into the first front baffle and is movable laterally with respect to the first front baffle. The technical scheme can realize a larger spreading width variation range, however, a further improvement exists in that as the second front baffle plate is inserted into the first front baffle plate, the lower edge of the second front baffle plate is about one plate thickness higher than the lower edge of the first front baffle plate, which leads to more spreading materials entering the space between the second front baffle plate and the telescopic screed plate, and the more the spreading materials are accumulated, the more the spreading materials are even exceeded the height of the telescopic screed plate, which is not beneficial to ensuring the consistency of the spreading quality and the smoothness of the telescopic screed plate. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a telescopic front baffle, a telescopic screed plate and a paver, which maintain the height consistency of the material level between a first front baffle, a second front baffle and the telescopic screed plate, ensure the consistency of paving quality and ensure the smoothness of the telescopic screed plate. In order to achieve the above purpose, the present invention provides the following technical solutions: In a first aspect, the invention provides a telescopic front baffle, which comprises a first front baffle and a second front baffle, wherein the first front baffle is hollow, the second front baffle is inserted into the first front baffle and can transversely move relative to the first front baffle, a first precompaction surface is arranged at the lower part of the first front baffle, a second precompaction surface with smaller precompaction capacity on paving materials than that of the first precompaction surface is arranged at the lower part of the second front baffle, or a vertical surface is arranged at the lower part of the second front baffle. Further, the first pre-compaction surface and the second pre-compaction surface are both beveled, and the beveled size of the second pre-compaction surface is smaller than the beveled size of the first pre-compaction surface. Further, the first pre-compacted surface is a slope, and the lower part of the second front baffle plate is provided with a vertical surface. Further, the first front baffle comprises a top plate, a first vertical plate and a second vertical plate which are vertically connected with the top plate, and a first horizontal plate which is vertically connected with the second vertical plate, and the first pre-compaction surface is connected between the first vertical plate and the first horizontal plate. Further, the first pre-compacted surface is at an angle of 15 ° to 60 ° to the horizontal. Preferably, the angle between the first pre-compacted surface and the horizontal plane is 45 °. Further, the projection height of the first precompa