Road stone mat layer precision flattening device

Abstract

The utility model discloses a kind of road broken stone cushion layer fine flat device, it is related to pavement laying field, including guide rail, scraping device and pull rod, scraping device is set on guide rail by gyro wheel rolling, pull rod is detachably set on scraping device;The scraping device includes support beam, support leg, counterweight device and adjustable scraping unit, support leg is symmetrically set at support beam two sides, support leg can slide on support beam, support leg is positioned and locked by bolt extrusion on support beam, counterweight device is set at support leg top, adjustable scraping unit is set on support beam, adjustable scraping unit can slide up and down on support beam, adjustable scraping unit is positioned and locked by nut on support beam, the utility model structure design is simple, easy to operate, can realize accurate leveling, can also adapt to complex space, and special fine flat device of convenient disassembly transportation and quick assembly, to improve broken stone cushion layer construction quality and efficiency, reduce artificial dependence, fill the application blank of existing equipment and tool.

Description

Technical Field

[0001] This utility model relates to the field of road paving, and in particular to a fine leveling device for road crushed stone subbase. Background Technology

[0002] In road engineering, especially in the construction of stone pavements for sidewalks, squares, and courtyards, the flatness of the crushed stone subbase (or gravel subbase) is a crucial foundational process that determines the final pavement's flatness, aesthetics, and service life. A well-flattened crushed stone subbase effectively prevents problems such as hollow areas, cracks, water accumulation, and uneven settlement after stone paving. However, the current leveling and finishing process for the crushed stone subbase presents significant challenges, hindering construction efficiency and quality. Manual leveling is inaccurate and inefficient. Currently, for large areas or areas accessible to heavy machinery, heavy-duty graders or rollers are often used for initial leveling. However, in narrow alleys, courtyards, around existing structures, along green belts, in areas requiring partial repairs to sidewalks, and in special areas where large equipment cannot enter or has difficulty turning around, heavy machinery is useless. In these "small areas," the limitations of traditional manual leveling operations are further amplified. Workers lack effective specialized tools, and the limited operating space makes it extremely difficult to achieve efficient crushed stone subbase leveling in these critical areas. This often becomes a weak link in the entire road construction project, delaying the construction period and affecting the overall quality. Existing equipment lacks portability and adaptability. Although some small vibratory plate compactors or micro-leveling devices exist on the market, their design is mainly for compaction or large-area coarse leveling, with limited effectiveness in fine leveling. They also generally suffer from large size and weight, fixed structure, and difficulty in flexible disassembly, making transportation, relocation (especially in narrow spaces or stairwells), and on-site storage inconvenient. They cannot meet the needs for rapid deployment and flexible use in small, scattered, or inaccessible construction sites. Simple manual tools, while portable, have limited functionality and cannot provide precise elevation control or efficient leveling capabilities. Therefore, there is an urgent need for a dedicated fine leveling device with a simple structural design, easy operation, the ability to achieve precise leveling, adaptability to complex spaces, and easy disassembly, transportation, and rapid assembly. This device would improve the quality and efficiency of crushed stone subbase construction, reduce reliance on manual labor, and fill the application gap in existing equipment and tools. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to provide a road gravel subbase leveling device.

[0004] The road crushed stone subbase leveling device includes a guide rail, a leveling device and a tie rod. The leveling device is rolled on the guide rail by rollers, and the tie rod is detachably mounted on the leveling device.

[0005] The leveling device includes a support beam, support legs, a counterweight device, and an adjustable leveling unit. The support legs are symmetrically arranged on both sides of the support beam and can slide on the support beam. The support legs are positioned and locked on the support beam by bolts. The counterweight device is located on the top of the support legs. The adjustable leveling unit is located on the support beam and can slide up and down on the support beam. The adjustable leveling unit is positioned and locked on the support beam by nuts.

[0006] The support beam is provided with symmetrical slots at the front and back, and the front end of the tie rod is provided with a locking block that can be locked into the slot.

[0007] The support leg includes a T-shaped support column, rollers, and locking bolts. The support beam has symmetrically arranged sliding grooves at the front and back. The T-shaped support column is slidably installed on the support beam through the sliding grooves. The locking bolts are screwed onto the T-shaped support column and are symmetrically arranged on both sides of the T-shaped support column. When the locking bolts are tightened, the front end of the locking bolts presses against the sliding grooves, and the rollers roll at the bottom of the T-shaped support column.

[0008] The counterweight device includes a fixing screw, a limiting nut, and several counterweight blocks. The fixing screw is screwed to the top of the T-shaped support column, the several counterweight blocks are sleeved on the fixing screw, and the limiting nut is screwed to the top of the fixing screw.

[0009] The adjustable leveling unit includes a limiting plate seat, a limiting plate, a scraper, a locking nut, and a washer. Screws are symmetrically arranged on the scraper, and oblong adjustment holes are symmetrically arranged on the support beam. The limiting plate seat is fixedly mounted on the bottom surface of the support beam, and the limiting plates are symmetrically fixed on the front and rear sides of the limiting plate seat. The scraper is slidably disposed between the two limiting plates, with a clearance fit between the scraper and the two limiting plates. The screws on the scraper pass through the oblong adjustment holes, and the locking nuts are screwed onto the screws and distributed at the upper and lower ends of the oblong adjustment holes. A washer is provided between the locking nut and the oblong adjustment holes, and the washer is sleeved on the screws.

[0010] The guide rail includes a base, a guide rail body, an adjusting screw, and a locking nut. The guide rail body is fixed on the base. The adjusting screw passes through both ends of the guide rail body. Locking nuts are provided on both sides of the guide rail body and are screwed onto the adjusting screw. Guide grooves are provided on the guide rail body for use with rollers.

[0011] The beneficial effects of this utility model are:

[0012] This utility model is a special precision leveling device with a simple structural design and easy operation. It can achieve precise leveling, adapt to complex spaces, and is easy to disassemble, transport, and quickly assemble. It can improve the construction quality and efficiency of crushed stone cushion layer, reduce reliance on manual labor, and fill the application gap of existing equipment and tools. Attached Figure Description

[0013] Figure 1This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 This is a three-dimensional schematic diagram of the scraping device of this utility model;

[0015] Figure 3 This is a three-dimensional schematic diagram of the pull rod of this utility model;

[0016] Figure 4 This is a three-dimensional schematic diagram of the support beam of this utility model;

[0017] Figure 5 This is a three-dimensional schematic diagram of the scraping device of this utility model without the pull rod;

[0018] Figure 6 This is a top view of the scraping device of this utility model;

[0019] Figure 7 This is a utility model Figure 6 Cross-sectional view along the AA direction;

[0020] Figure 8 This is an assembly view of the support leg and counterweight device of this utility model;

[0021] Figure 9 This is a three-dimensional schematic diagram of the guide rail of this utility model; Detailed Implementation

[0022] Please refer to the figure. Figure 9 As shown, the road crushed stone subbase leveling device includes a guide rail 1, a leveling device 2 and a pull rod 3. The leveling device 2 is rolled on the guide rail 1 by rollers, and the pull rod 3 is detachably mounted on the leveling device 2.

[0023] Specifically, guide rail 1 is set on both sides of the crushed stone pad that needs to be finely leveled, scraping device 2 is set on guide rail 1, and then the scraping device 2 is pulled back and forth by pull rod 3 to finely level the crushed stone pad.

[0024] The leveling device 2 includes a support beam 21, support legs 22, a counterweight device 23, and an adjustable leveling unit 24. The support legs 22 are symmetrically arranged on both sides of the support beam 21 and can slide on the support beam 21. The support legs 22 are positioned and locked on the support beam 21 by bolts. The counterweight device 23 is located on the top of the support legs 22. The adjustable leveling unit 24 is located on the support beam 21 and can slide up and down on the support beam 21. The adjustable leveling unit 24 is positioned and locked on the support beam 21 by nuts.

[0025] Specifically, the support legs 22 are symmetrically arranged on both sides of the support beam 21 and can slide on the support beam 21. They are then locked in place by bolts. This allows for adjustment of the span between the support legs 22 to accommodate different guide rail widths and thus different workspaces. The counterweight device 23 applies counterweight pressure to the entire leveling device 2 to ensure the leveling effect of the adjustable leveling unit 24 on the gravel cushion layer. The adjustable leveling unit 24 can slide up and down on the support beam 21 and is locked in place by nuts. This allows the adjustable leveling unit 24 to adapt to different gravel cushion layer thicknesses and also to limit the thickness of the gravel cushion layer. The thickness of the gravel cushion layer can be limited by adjusting the height of the adjustable leveling unit 24. The entire leveling device 2 can be disassembled into the support beam 21, support legs 22, counterweight device 23, and adjustable leveling unit 24 for easy transportation.

[0026] The support beam 21 is symmetrically provided with slots 213, and the front end of the tie rod 3 is provided with a locking block 31, which can be locked into the slots 213.

[0027] Specifically, the pull rod 3 can be replaced by the cooperation of the locking block 31 and the locking slot 213, which makes it convenient to drag the scraping device 2 back and forth by the pull rod 3.

[0028] The support leg 22 includes a T-shaped support column 221, a roller 222, and a locking bolt 223. The support beam 21 has symmetrically arranged sliding grooves 211. The T-shaped support column 221 is slidably installed on the support beam 21 through the sliding grooves 211. The locking bolt 223 is screwed onto the T-shaped support column 221. The locking bolts 223 are symmetrically arranged on both sides of the T-shaped support column 221. When the locking bolt 223 is tightened, the front end of the locking bolt 223 presses against the sliding groove 211, and the roller 222 rolls at the bottom of the T-shaped support column 221.

[0029] Specifically, the T-shaped support column 221 is positioned and locked in the support beam 21 by the front end of the locking bolt 223 pressing the slide groove 211, and the roller 222 is used to roll on the guide rail 1.

[0030] The counterweight device 23 includes a fixing screw 231, a limiting nut 232 and several counterweight blocks 233. The fixing screw 231 is screwed to the top of the T-shaped support column 221, the several counterweight blocks 233 are sleeved on the fixing screw 231, and the limiting nut 232 is screwed to the top of the fixing screw 231.

[0031] Specifically, the limiting nut 232 is screwed onto the top of the fixing screw 231 to limit and fix the counterweight 233.

[0032] The adjustable scraping unit 24 includes a limiting plate seat 214, a limiting plate 242, a scraper 243, a locking nut 244, and a pad 245. The scraper 243 is symmetrically provided with screws 2431, and the support beam 21 is symmetrically provided with elongated adjustment holes 212. The limiting plate seat 214 is fixedly provided on the bottom surface of the support beam 21, and the limiting plates 242 are symmetrically fixed on the front and rear sides of the limiting plate seat 214. The scraper 243 is slidably provided between the two limiting plates 242, and there is a clearance fit between the scraper 243 and the two limiting plates 242. The screws 2431 on the scraper 243 pass through the elongated adjustment holes 212, and the locking nuts 244 are screwed onto the screws 2431 and distributed at the upper and lower ends of the elongated adjustment holes 212. A pad 245 is provided between the locking nut 244 and the elongated adjustment holes 212, and the pad 245 is sleeved on the screws 2431.

[0033] Specifically, the limiting plate seat 214 and the limiting plate 242 can strengthen the scraper 243, preventing the scraper 243 from exerting all its force on the screw 2431 when scraping the gravel pad back and forth, thus preventing deformation of the scraper 243 and affecting the scraping effect. The screw 2431 can slide up, down, left, and right in the elongated adjustment hole 212, and is then locked and limited by the locking nuts 244 located at the upper and lower ends of the support beam 21. When it is necessary to adjust the position of the scraper 243, the locking nuts are loosened. The mother plate 244 and the pad 245 are disengaged from the surface of the support beam 21. Then the screw 2431 can slide freely in the circular adjustment hole 212, which can adjust the up, down, left and right positions of the scraper 243. The up and down adjustment is used to limit the thickness of the crushed stone pad layer, and the left and right adjustment is used to expand the scraping area of ​​the scraper 243. When the scraper 243 is adjusted to the desired position, the upper and lower locking nuts 244 are tightened, so that the upper and lower pads 245 are once again in contact with the surface of the support beam 21, thereby limiting the position of the scraper 243.

[0034] The guide rail 1 includes a base 11, a guide rail body 12, an adjusting screw 13, and a locking nut 14. The guide rail body 12 is fixed on the base 11. The adjusting screw 13 passes through the front and rear ends of the guide rail body 12. Locking nuts 14 are provided on both sides of the guide rail body 12 and are screwed onto the adjusting screw 13. A guide groove 121 is provided on the guide rail body 12 for use with the roller 222.

[0035] Specifically, the guide rail bodies 12 are arranged side by side on the adjusting screw 13. The width of the two guide rail bodies 12 can be adjusted by adjusting the position of the locking nut 14 on the adjusting screw 13 to adapt to different work spaces.

[0036] The working principle and process of this utility model:

[0037] Please see Figures 1 to 9As shown, in use, the guide rail 1 is first set up according to the working space. Then, according to the width of the guide rail 1, the support legs 22 are installed on the support beam 21 and the spacing of the support legs 22 is adjusted to ensure that the rollers 222 fall into the guide groove 121. Then, the locking bolts 223 are tightened. Then, the counterweight device 23 is installed on the support legs 22. Then, the adjustable leveling unit 24 is installed on the support beam 21. The height of the scraper 243 is adjusted according to the thickness of the crushed stone pad layer. Then, the locking nut 244 is tightened. Finally, the locking block 31 of the pull rod 3 is engaged into the locking groove 213. Then, the pull rod 3 is pulled back and forth to scrape the crushed stone pad layer in the guide rail 1 through the scraper 243. After scraping, the various parts are disassembled and transported away for the next use.

Claims

1. A road crushed stone subbase leveling device, characterized in that: It includes a guide rail (1), a leveling device (2) and a pull rod (3). The leveling device (2) is rolled on the guide rail (1) by rollers, and the pull rod (3) is detachably mounted on the leveling device (2). The leveling device (2) includes a support beam (21), support legs (22), a counterweight device (23), and an adjustable leveling unit (24). The support legs (22) are symmetrically arranged on both sides of the support beam (21). The support legs (22) can slide on the support beam (21). The support legs (22) are positioned and locked on the support beam (21) by bolts. The counterweight device (23) is located on the top of the support legs (22). The adjustable leveling unit (24) is located on the support beam (21). The adjustable leveling unit (24) can slide up and down on the support beam (21). The adjustable leveling unit (24) is positioned and locked on the support beam (21) by nuts. The support beam (21) is symmetrically provided with slots (213) at the front and back, and the front end of the tie rod (3) is provided with a locking block (31), which can be locked into the slot (213); The support leg (22) includes a T-shaped support column (221), a roller (222) and a locking bolt (223). The support beam (21) is symmetrically provided with a sliding groove (211). The T-shaped support column (221) is slidably installed on the support beam (21) through the sliding groove (211). The locking bolt (223) is screwed onto the T-shaped support column (221). The locking bolts (223) are symmetrically arranged on both sides of the T-shaped support column (221). When the locking bolt (223) is tightened, the front end of the locking bolt (223) presses against the sliding groove (211), and the roller (222) rolls at the bottom of the T-shaped support column (221). The counterweight device (23) includes a fixing screw (231), a limiting nut (232) and several counterweight blocks (233). The fixing screw (231) is screwed to the top of the T-shaped support column (221), the several counterweight blocks (233) are sleeved on the fixing screw (231), and the limiting nut (232) is screwed to the top of the fixing screw (231). The adjustable scraping unit (24) includes a limiting plate seat (214), a limiting plate (242), a scraper (243), a locking nut (244), and a pad (245). A screw (2431) is symmetrically arranged on the scraper (243), and an elongated adjusting hole (212) is symmetrically arranged on the support beam (21). The limiting plate seat (214) is fixedly arranged on the bottom surface of the support beam (21), and the limiting plate (242) is symmetrically fixed on the front and rear sides of the limiting plate seat (214). 3) The sliding arrangement is between the two limiting plates (242). The scraper (243) is fitted with the two limiting plates (242) with a clearance. The screw (2431) on the scraper (243) passes through the elongated adjustment hole (212). The locking nut (244) is screwed on the screw (2431) and distributed at the upper and lower ends of the elongated adjustment hole (212). A pad (245) is provided between the locking nut (244) and the elongated adjustment hole (212). The pad (245) is sleeved on the screw (2431).

2. The road gravel subbase leveling device according to claim 1, characterized in that: The guide rail (1) includes a base (11), a guide rail body (12), an adjusting screw (13), and a locking nut (14). The guide rail body (12) is fixed on the base (11). The adjusting screw (13) passes through the front and rear ends of the guide rail body (12). Locking nuts (14) are provided on both sides of the guide rail body (12). Locking nuts (14) are screwed onto the adjusting screw (13). A guide groove (121) is provided on the guide rail body (12). The guide groove (121) is used to cooperate with the roller (222).

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