Land leveler for road ground shaping
By designing a synchronous flip adjustment mechanism for the mid-position scraper and the adjustment scraper, the problems of small effective operating area and tire wear of existing grader scrapers are solved, achieving more efficient soil leveling and reducing wear.
Patent Information
- Application Number
- CN202510730207.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2025-09-12
AI Technical Summary
When existing graders are leveling soil piles, the effective working area of the scraper is small, resulting in low leveling efficiency. In addition, the reaction force of the soil pile on the scraper easily causes wear of the machine tires.
A scraper mechanism including a mid-position scraper and a rotatable adjustable scraper is designed. The mid-position scraper is made to face the soil pile vertically, and the adjustable scraper is rotated to a deflected state relative to the mid-position scraper to increase the effective utilization area of the scraper. The synchronous flipping adjustment of the scraper is achieved through the linkage block and the oil cylinder.
The scraper's leveling efficiency is improved, soil accumulation and tire wear are avoided, the effective utilization area of the scraper is increased, and the working efficiency of the machine body is improved.
Smart Images
Figure CN120625445A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of highway engineering machinery and equipment, and in particular to a motor grader for highway ground shaping. Background Art
[0002] A highway grader is a piece of machinery used to build highways, pave roads, and level the ground. It is mainly used to level and compact soil, stones, and other materials in order to create a solid and smooth road surface. A grader usually consists of a cab and a leveling tool. The height and angle of the tool can be controlled by the driver to achieve leveling and finishing of the land.
[0003] When using an existing motor grader, the scraper is controlled to rotate to an inclined state in the direction of travel of the machine body, and the scraper is driven by the machine body to move, so that the soil pile or stone pile moves along the inclined scraper, and the soil pile is leveled by the bottom of the scraper.
[0004] However, since the soil pile is transported by a transport truck, the transport truck dumps the soil pile on the road while moving. Therefore, the soil pile is generally initially stacked in a straight line. When the existing grader levels the initial soil pile, the wheels are located on both sides of the soil pile and move forward. This makes the middle part of the scraper directly contact the soil pile, and the soil pile moves toward one end along the inclined scraper, and the other end of the scraper is not effectively utilized, resulting in a smaller effective working area of the scraper during a single travel operation of the machine body, resulting in low leveling efficiency, and the reaction force of the soil pile on the inclined scraper can easily cause the tires of the machine body to wear. Summary of the Invention
[0005] The present application proposes a motor grader for road surface shaping, which has the advantage of a larger effective utilization area of the scraper, and is used to solve the above-mentioned technical problems existing in existing motor graders.
[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a motor grader for road surface shaping, comprising a machine body, a turntable platform fixedly mounted on the machine body, and a scraper lifting cylinder fixedly mounted on the machine body for driving the turntable platform to move up and down, a scraper mechanism being provided at the bottom of the turntable platform, the scraper comprising a center scraper, and adjustment scrapers being provided at both ends of the center scraper. During the initial operation for leveling the soil pile, the center scraper is vertically facing the soil pile, and the two adjustment scrapers are both rotated relative to the center scraper to a skewed state.
[0007] Optionally, two positioning sleeves are fixedly installed in the middle of one side of the median scraper, a positioning vertical shaft is fixedly mounted between the two positioning sleeves, two linkage blocks are movably mounted on the positioning vertical shaft, and the two linkage blocks are fixedly connected with U-shaped connecting parts III at one end away from the positioning sleeve, and the two U-shaped connecting parts III are fixedly connected to the two adjusting scrapers respectively.
[0008] Optionally, a mounting bracket is fixedly installed in the middle of one side of the adjusting scraper, a mounting block is fixedly installed at one end of the mounting bracket, the mounting block is located on the end of the mounting bracket close to the middle scraper, a U-shaped connecting piece II is fixedly installed on the top of the mounting block, the middle rotating sleeve of the U-shaped connecting piece II is provided with a limiting shaft, a limiting sleeve is fixedly installed on one side of the top of the limiting shaft, a scraper rotating cylinder is installed at the bottom of the turntable platform, and one end of the cylinder body of the scraper rotating cylinder is rotatably connected to the turntable platform.
[0009] Optionally, one end of the piston shaft of the scraper rotating cylinder is hinged to the limiting ball sleeve.
[0010] Optionally, the linkage block is in the shape of an arc block.
[0011] Optionally, a U-shaped block is fixedly mounted on the positioning vertical shaft, and the U-shaped block is integrally formed by a middle connecting rod and side rods located at both ends of the middle connecting rod, and the side rods at both ends of the U-shaped block are fixedly sleeved on the positioning vertical shaft at one end away from the middle connecting rod, and a U-shaped connecting piece II is fixedly installed in the middle of one side of the middle connecting rod of the U-shaped block, and the bottom of the turntable platform is rotatably connected to a scraper flip cylinder through a fixed shaft on the L-shaped plate, and one end of the piston shaft of the scraper flip cylinder is rotatably connected to the fixed shaft on the U-shaped connecting piece II.
[0012] Optionally, both ends of the positioning vertical shaft are connected to limiting screw sleeves, and the two limiting screw sleeves are respectively arranged on one side of the two side rods.
[0013] Optionally, both ends of the median scraper are provided with a groove facing one side of the U-shaped block, the depth of the groove is half of the thickness of the median scraper, and the groove is adapted to the protrusion at one end of the adjusting scraper.
[0014] Optionally, the length of the median scraper does not exceed one third of the length of the adjusted scraper.
[0015] Beneficial effects of the present invention: 1. The present application provides a road surface shaping grader, which is provided with a scraper mechanism consisting of a center scraper and two rotatable adjustable scrapers, while not affecting the synchronous flipping adjustment of the two scrapers. During the initial operation of leveling the soil pile, the center scraper is vertically facing the soil pile, and the two adjustable scrapers are rotated to a skewed state relative to the center scraper, so that when leveling the soil pile, the soil pile will move in different directions along the adjustable scrapers on both sides of the center scraper, so that the center scraper and the two adjustable scrapers can perform the leveling operation at the same time. During each movement of the machine body, the effective utilization area of the scraper mechanism in the soil pile leveling operation is increased.
[0016] 2. The soil pile at the middle scraper in the middle of the scraper mechanism will move in different directions along the adjustable scrapers on both sides. Compared with the existing grader where the soil pile always moves along one side of the scraper, it avoids the problem of soil pile accumulating too high at the scraper and moving from the top of the scraper to the back side, which requires multiple leveling operations.
[0017] 3. The soil pile at the middle scraper in the middle of the scraper mechanism will move in different directions along the adjustable scrapers on both sides, so that the components of the reaction force of the soil pile on the two adjustable scrapers in the vertical direction of the moving direction of the machine body are offset, avoiding the problem that the existing grader scraper is subjected to the component of the reaction force of the soil pile in the vertical direction of the moving direction of the machine body, which easily leads to the wear of the machine tire. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.
[0019] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic structural plan view of the motor grader of the present invention; Figure 2 for Figure 1 Structural diagram of the middle scraper mechanism; Figure 3 for Figure 2 Schematic diagram of the right-view stereoscopic structure; Figure 4 for Figure 2 Right view; Figure 5 for Figure 3 Schematic diagram of the connection structure between the middle scraper and the adjustment scraper; Figure 6 for Figure 5 Schematic diagram of the structure of the intermediate linkage block; Figure 7 for Figure 4 A local enlarged structural diagram of point A; Figure 8 for Figure 4 A schematic diagram of the partially enlarged structure at point B; Figure 9 for Figure 3 Schematic diagram of the left-view stereoscopic structure; Figure 10 for Figure 5 Schematic diagram of the median scraper structure; Figure 11 for Figure 2 A top view of the middle scraper mechanism; Figure 12 for Figure 11Schematic diagram of the force applied to the scraper when it is adjusted in working condition.
[0020] In the picture: 1. Machine body; 2. Turntable platform; 3. Scraper lifting cylinder; 4. Positioning hanging plate; 5. U-shaped block; 501, U-shaped connector II; 6. Scraper turning cylinder; 7. Limiting screw sleeve; 8. Center scraper; 9. Adjusting scraper; 10. Mounting frame; 11. Mounting block; 12. U-shaped connector II; 13. Limiting shaft; 14. Limiting sleeve; 15. Scraper rotating cylinder; 16. U-shaped connector III; 17. Linkage block; 18. Positioning sleeve. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0022] See also Figure 1 A road surface shaping grader includes a machine body 1, a turntable platform 2 is fixedly mounted on the machine body 1, and a scraper lifting cylinder 3 is fixedly mounted on the machine body 1 to drive the turntable platform 2 to move up and down. Figure 2-Figure 4 The bottom of the turntable platform 2 is fixed with two positioning hanging plates 4, and the two positioning hanging plates 4 are close to the middle of the bottom end of the turntable platform 2. The bottom ends of the two positioning hanging plates 4 are connected by a U-shaped block 5 through a positioning shaft. Figure 5 The U-shaped block 5 is formed by a middle connecting rod and side rods at both ends of the middle connecting rod, and the positioning shaft between the two positioning hanging plates 4 is set in the middle of the top side rod of the U-shaped block 5. The middle of one side of the middle connecting rod of the U-shaped block 5 is fixedly installed with a U-shaped connecting piece II 501. Please refer to Figure 2 、 Figure 3 and Figure 5 The bottom of the turntable platform 2 is rotatably connected to the scraper flip cylinder 6 through the fixed shaft on the L-shaped plate. One end of the piston shaft of the scraper flip cylinder 6 is rotatably connected to the fixed shaft on the U-shaped connecting piece II501, so that the scraper flip cylinder 6 drives the piston shaft to extend or retract, which can make the U-shaped block 5 rotate around the positioning shaft in the middle of its top side rod.
[0023] A positioning vertical shaft is provided between the two side rods on the U-shaped block 5, which is away from the side of the middle connecting rod. The two ends of the positioning vertical shaft are connected with a limiting screw sleeve 7, and the two limiting screw sleeves 7 are respectively provided on one side of the two side rods. The positioning vertical shaft is fixed between the two side rods of the U-shaped block 5 by the limiting screw sleeve 7. Please continue to refer to Figure 2-Figure 5A scraper mechanism is provided at the bottom of the turntable platform 2, and the scraper mechanism includes a mid-position scraper 8. Adjustment scrapers 9 are provided at both ends of the mid-position scraper 8. The two adjustment scrapers 9 can rotate relative to the mid-position scraper 8. Two positioning sleeves 18 are fixedly installed in the middle of one side of the mid-position scraper 8. The two positioning sleeves 18 are fixedly sleeved with the positioning vertical axis between the two side rods on the U-shaped block 5, and one side of the two positioning sleeves 18 is close to the two side rods respectively. The two adjustment scrapers 9 are fixedly installed with U-shaped connecting pieces III 16 on one side close to one end of the mid-position scraper 8. The linkage blocks 17 on the two adjusting scrapers 9 are staggered up and down, and the U-shaped connecting piece III 16 is fixed with a linkage block 17 on the side away from the adjusting scraper 9 by bolts.
[0024] See also Figure 5 and Figure 6 The linkage block 17 is in the shape of an arc block. The linkage block 17 is movably connected to the positioning vertical axis between the two side rods on the side away from the U-shaped connecting piece III 16, so that the two adjusting scrapers 9 can rotate relative to the middle scraper 8 about the axis of the positioning vertical axis between the two side rods on the U-shaped block 5. The arc design of the linkage block 17 allows the adjusting scraper 9 to maintain fit when it rotates to a state flush with the middle scraper 8, without affecting the rotation of the adjusting scraper 9 to a state deviated from the middle scraper 8.
[0025] See also Figure 4 and Figure 7 , a mounting bracket 10 is fixedly installed in the middle of one side of the adjustment scraper 9, and a mounting block 11 is fixedly installed at one end of the mounting bracket 10. The mounting block 11 is located on the mounting bracket 10 at one end near the middle scraper 8. A U-shaped connector II 12 is fixedly installed on the top of the mounting block 11. A limiting shaft 13 is installed in the middle of the U-shaped connector II 12. A limiting sleeve 14 is fixedly installed on one side of the top of the limiting shaft 13. A scraper rotating cylinder 15 is installed at the bottom of the turntable platform 2. Please refer to Figure 8 , one end of the cylinder of the scraper rotating cylinder 15 is connected to the turntable platform 2 for rotation, please continue to refer to Figure 4 and Figure 7 One end of the piston shaft of the scraper rotating cylinder 15 is ball-hinged with the limiting sleeve 14, so that the scraper rotating cylinder 15 can drive the piston shaft to pull or push the adjusting scraper 9 to rotate relative to the middle scraper 8 about the axis of the positioning vertical axis between the two side rods on the U-shaped block 5, while not affecting the scraper flipping cylinder 6 to drive the middle scraper 8 and the adjusting scraper 9 as a whole to rotate about the axis of the positioning shaft in the middle of the top side rod of the U-shaped block 5.
[0026] See also Figure 4 、 Figure 5 and Figure 9 , the length of the middle scraper 8 does not exceed one third of the length of the adjustment scraper 9, please refer to Figure 11During the initial operation of leveling the soil pile, the middle scraper 8 is vertically oriented toward the soil pile, and the adjustment scrapers 9 at both ends of the middle scraper 8 are controlled to rotate to the following positions: Figure 12 In the state shown, the two adjusting scrapers 9 are tilted to one side relative to the middle scraper 8. At this time, the scraper mechanism is driven to move to the left by the machine body 1. The middle scraper 8 directly acts on the soil pile. The soil in the soil pile moves outward along the two adjusting scrapers 9 respectively and is scraped flat by the bottom structure of the middle scraper 8 and the adjusting scraper 9. At this time, the adjusting scraper 9 is subjected to the reaction force F of the soil pile. The horizontal component F1 and the longitudinal component F2 of the reaction force F are shown as follows. Figure 12 As shown, the longitudinal force F2 received by the two adjustable scrapers 9 cancel each other out, and the driving traction force of the horizontal force F1 cancels out, thereby avoiding the problem that the existing grader is affected by the longitudinal force of the reaction force of the soil pile during the leveling operation, which affects the straight-line movement of the grader and causes the tires of the grader to be easily worn. At the same time, compared with the existing grader in the initial leveling stage of the soil pile, the soil pile is only moved toward one side of the scraper for leveling. The initial work efficiency is improved, and the soil pile at the middle scraper 8 in the middle of the scraper mechanism will move in different directions along the adjustable scrapers 9 on both sides respectively, avoiding the problem that the soil pile at the middle scraper 8 accumulates too high and moves from the top of the scraper to the back side, requiring multiple leveling operations. At the same time, the middle scraper 8 and the two adjustable scrapers 9 participate in the leveling operation at the same time, so that during each movement of the machine body 1, the effective utilization area of the scraper mechanism in the soil pile leveling operation is increased, thereby further improving the working efficiency of the grader.
[0027] See also Figure 5 and Figure 10 , both ends of the middle scraper 8 are provided with a groove toward one side of the U-shaped block 5, the depth of the groove is half of the thickness of the middle scraper 8, and the groove is adapted to the protrusion at one end of the adjustment scraper 9, so that the middle scraper 8 and the two adjustment scrapers 9 form a Figure 10 In the flush state shown, the thickness of the protruding adjustment scraper 9 on the side of the median scraper 8 away from the U-shaped block 5 is small, which does not affect the movement of the soil pile along one of the adjustment scrapers 9 to the median scraper 8 and then to the other adjustment scraper 9.
[0028] When the road surface shaping grader is in use, the scraper lifting oil cylinder 3 first drives the piston shaft to drive the turntable platform 2 to move longitudinally as a whole to adjust the position of the scraper mechanism, and then controls the two scraper rotating oil cylinders 15 to drive the piston shaft to pull the two adjustment scrapers 9 to rotate as shown below. Figure 12In the state shown, the specific rotation angle is controlled by the actual specific situation during operation, and then the scraper mechanism is driven by the body 1 to move to the left as a whole, and the middle scraper 8 directly acts on the soil pile, and as the body 1 moves, the soil in the soil pile will also move in different directions along the adjustment scrapers 9 on both sides of the middle scraper 8. The middle scraper 8 and the two adjustment scrapers 9 simultaneously participate in the leveling operation of the soil pile. After the soil pile is initially leveled, the two scraper rotation cylinders 15 are controlled to drive the piston shafts to push the two adjustment scrapers 9 to rotate as shown. Figure 11 In the state shown, the turntable platform 2 controls the center scraper 8 and the adjustment scraper 9 to rotate as a whole to perform precise operations.
Claims
1. A road surface shaping grader, comprising a machine body (1), a turntable platform (2) fixedly mounted on the machine body (1), and a scraper lifting cylinder (3) for driving the turntable platform (2) to move up and down fixedly mounted on the machine body (1), characterized in that: A scraper mechanism is provided at the bottom of the turntable platform (2), and the scraper includes a center scraper (8). Adjustment scrapers (9) are provided at both ends of the center scraper (8). During the initial operation of leveling the soil pile, the center scraper (8) is vertically oriented toward the soil pile, and the two adjustment scrapers (9) are rotated relative to the center scraper (8) to a skewed state.
2. The motor grader for road surface shaping according to claim 1, characterized in that: Two positioning sleeves (18) are fixedly installed in the middle of one side of the middle scraper (8), a positioning vertical shaft is fixedly mounted between the two positioning sleeves (18), two linkage blocks (17) are movably mounted on the positioning vertical shaft, and the ends of the two linkage blocks (17) away from the positioning sleeve (18) are respectively fixedly connected to U-shaped connecting pieces III (16), and the two U-shaped connecting pieces III (16) are respectively fixedly connected to the two adjusting scrapers (9).
3. The motor grader for road surface shaping according to claim 2, characterized in that: A mounting frame (10) is fixedly installed in the middle of one side of the adjusting scraper (9), and a mounting block (11) is fixedly installed at one end of the mounting frame (10). The mounting block (11) is located on the mounting frame (10) at one end close to the middle scraper (8). A U-shaped connecting member II (12) is fixedly installed on the top of the mounting block (11). A limiting shaft (13) is rotatably sleeved in the middle of the U-shaped connecting member II (12). A limiting sleeve (14) is fixedly installed on one side of the top of the limiting shaft (13). A scraper rotating cylinder (15) is installed at the bottom of the turntable platform (2), and one end of the cylinder body of the scraper rotating cylinder (15) is rotatably connected to the turntable platform (2).
4. The motor grader for road surface shaping according to claim 3, characterized in that: One end of the piston shaft of the scraper rotating oil cylinder (15) is spherically hinged to the limiting sleeve (14).
5. The motor grader for road surface shaping according to claim 2, characterized in that: The linkage block (17) is in the shape of an arc block.
6. The motor grader for road surface shaping according to claim 2, characterized in that: A U-shaped block (5) is fixedly mounted on the positioning vertical shaft. The U-shaped block (5) is integrally formed by a middle connecting rod and side rods at both ends of the middle connecting rod. One end of the side rods at both ends of the U-shaped block (5) away from the middle connecting rod is fixedly sleeved with the positioning vertical shaft. A U-shaped connecting piece II (501) is fixedly mounted in the middle of one side of the middle connecting rod of the U-shaped block (5). The bottom of the turntable platform (2) is rotatably connected to a scraper turning cylinder (6) through a fixed shaft on the L-shaped plate. One end of the piston shaft of the scraper turning cylinder (6) is rotatably connected to the fixed shaft on the U-shaped connecting piece II (501).
7. The motor grader for road surface shaping according to claim 6, characterized in that: The two ends of the positioning vertical shaft are connected to limiting screw sleeves (7), and the two limiting screw sleeves (7) are respectively arranged on one side of the two side rods.
8. The motor grader for road surface shaping according to claim 6, characterized in that: Both ends of the middle scraper (8) are provided with grooves facing one side of the U-shaped block (5), the depth of the grooves being half the thickness of the middle scraper (8), and the grooves being adapted to the protrusions at one end of the regulating scraper (9).
9. The motor grader for road surface shaping according to claim 1, characterized in that: The length of the median scraper (8) does not exceed one third of the length of the regulating scraper (9).