A road grader

Abstract

The utility model discloses a road grader belongs to the construction or its pavement machinery and accessory tool field of road, stadium or similar engineering, the scraper subassembly of this grader includes scraper mainboard and two adjustable scraper edge board, the first adjusting telescopic link of scraper mainboard back surface installation controls two scraper edge board and spreads out to the outside along the length direction of scraper mainboard, or is withdrawn to the middle of scraper mainboard, the total length of scraper subassembly can be adjusted in this design, can carry out the scraping of the ground near curbstone, in addition, when the width between two curbstones changes in a certain range, this structure can all be applicable, expands the application range of the grader of the application.

Description

Technical Field

[0001] This utility model relates to the field of machinery and auxiliary tools for the construction or paving of roads, stadiums or similar projects, and particularly to a road grader. Background Technology

[0002] Graders are important engineering machines used in earthwork projects for shaping and leveling roadbeds or pavements. They are widely used in large-scale construction projects such as highways, mines, and water conservancy projects for ground leveling.

[0003] In existing technologies, some construction processes require placing a grader between two curbs. Due to the width limitation between the two curbs, the length of the grader's blade cannot exceed the width between the two curbs, otherwise the blade cannot be placed between the two curbs for operation. At the same time, after the grader's blade is placed between the two curbs, there is always a large gap between it and the two curbs on both sides, and a large area of ​​the ground cannot be leveled in this gap. Utility Model Content

[0004] The purpose of this utility model is to provide a road grader for use in construction between two curb stones. The scraper length of the road grader is adjustable, which can level the ground near the curb stone.

[0005] The technical solution adopted by this utility model is as follows: This utility model provides a road grader, including a rectangular body with two sets of walking rollers symmetrically arranged at both ends. Each set of walking rollers consists of a front roller bracket, a front roller, a rear roller bracket, and a rear roller. The front roller is mounted on the front side of the body through the front roller bracket, and the rear roller is mounted on the rear side of the body through the rear roller bracket. The body rolls on two parallel curb stones via the front and rear rollers at both ends. A scraper assembly is mounted on the rear side of the body via a scraper bracket. The scraper assembly includes a scraper main plate and two adjustable scraper edge plates. The upper part of the scraper bracket is connected to the body, and the lower part of the scraper bracket is connected to the back of the scraper main plate. A first adjusting telescopic rod is installed on the back of the scraper main plate. Scraper edge plates are movably mounted on the back of both sides of the scraper main plate. The piston rod end of the first adjusting telescopic rod is connected to the back of the scraper edge plates. The movement of the first adjusting telescopic rod controls the two scraper edge plates to extend outward along the length of the scraper main plate or retract towards the center of the scraper main plate.

[0006] In one possible design, the lengths of the front and rear rollers are both greater than the width of the curbstone. During the grader's operation, the front and rear rollers roll on the corresponding curbstone surfaces, with both ends of the front and rear rollers extending beyond the curbstone.

[0007] In one possible design, two elongated limiting rods are provided on the back of the scraper main board, extending along the length of the scraper main board and arranged parallel to each other vertically; the front side of the limiting rods is fixedly connected to the scraper main board by several bolts; a gap is maintained between the front side of the limiting rods and the back of the scraper main board; two scraper edge plates are installed on the back of both sides of the scraper main board, and the scraper edge plates partially overlap with the scraper main board; the scraper edge plates are partially inserted into the gap between the front side of the limiting rods and the back of the scraper main board; the scraper edge plates can move in the gap along the length of the scraper main board.

[0008] In one possible design, a space is formed between the two limiting rods, and a first adjusting telescopic rod is installed in this space; the first adjusting telescopic rod is a double piston rod hydraulic cylinder, the cylinder is fixed to the back of the scraper main plate, and the ends of the two piston rods are connected to the connecting seat on the back of the scraper edge plate.

[0009] In one possible design, the rear sides of the two limiting rods are beveled, and elongated clamping connecting rods are installed on the beveled surfaces to connect to the scraper bracket. The scraper bracket consists of two symmetrically arranged bracket arm assemblies and a central connecting plate. Each bracket arm assembly consists of an L-shaped bracket arm, a triangular clamping plate, and a second adjusting telescopic rod. The two bracket arms are connected by the central connecting plate. The upper end of the bracket arm is connected to the rear side of the machine body, and the clamping plate is installed on the inner side of the lower end of the bracket arm. The two forward-facing corners of the clamping plate are fixedly connected to the two clamping connecting rods. A hinge shaft is provided at the connection between the clamping plate and the lower clamping connecting rod, and the inner side of the lower end of the bracket arm is hinged to the hinge shaft. A second adjusting telescopic rod is provided on the inner side of the bracket arm, and the piston rod of the second adjusting telescopic rod extends backward and downward and is hinged to the rearward-facing corner of the clamping plate. The upper end of the cylinder of the second adjusting telescopic rod is hinged to the rotating shaft on the inner side of the bracket arm.

[0010] In one possible design, a front connecting plate extends forward from the outer edge of the scraper edge plate, and a vertically mounted swing shaft is provided on the inner side of the front connecting plate; the movable scraper has a vertical panel, the back of which is connected to the swing shaft; the vertical panel extends forward and outward beyond the front connecting plate; the elastic limiting structure includes a limiting post and a first limiting spring; during installation, a limiting groove is formed on the vertical panel, penetrating the vertical panel and located in front of the swing shaft, and the limiting groove is perpendicular to the swing shaft; the limiting post passes through the limiting groove and is connected to the front connecting plate; when the vertical panel rotates around the swing shaft, the limiting groove slides along the limiting post; the first limiting spring is installed on the limiting post, pressing against the limiting groove to restrict the vertical panel from rotating inward around the swing shaft.

[0011] In one possible design, a roller is mounted on the front edge of the movable side scraper, and the roller makes rolling contact with the inner side of the curb.

[0012] In one possible design, guide devices are provided on both sides of the fuselage. The guide devices mainly include guide brackets and guide wheels. The guide brackets can be adjusted vertically and horizontally, thereby adjusting the guide wheels to be close to the outer side of the curb.

[0013] In one possible design, the guide bracket includes a guide mounting seat, a vertical adjusting screw, a vertical guide rod, a nut adjusting bracket, and a horizontal telescopic rod. The guide mounting seat is fixedly mounted on the machine body, and a rotatable vertical adjusting screw is mounted on the guide mounting seat, passing through the guide mounting seat. A nut adjusting bracket is mounted on the vertical adjusting screw below the guide mounting seat, and the nut adjusting bracket consists of a nut section in the middle and guide arms symmetrically arranged on both sides. The nut section is threadedly connected to the vertical adjusting screw. Vertical guide rods are symmetrically arranged on both sides of the nut section on the nut adjusting bracket, and the vertical guide rods pass upward through a through hole in the guide mounting seat. A first hand crank is provided at the top of the vertical adjusting screw, and the nut section moves up and down as the vertical adjusting screw rotates. A horizontal telescopic rod is mounted on each of the two guide arms, and the piston rod of the horizontal telescopic rod faces one side of the machine body. A vertical guide wheel shaft is mounted on the end of the piston rod through an elastic contact structure, and a guide wheel is mounted on the guide wheel shaft.

[0014] In one possible design, a cleaning device is provided on the front side of the front roller. The cleaning device includes a mounting plate located above the front side of the front roller, and a connecting rod seat and a third adjusting telescopic rod located below the mounting plate. Four connecting rods are arranged in parallel on the connecting rod seat. The four connecting rods are arranged in pairs and opposite to each other. One end of each connecting rod is hinged to the connecting rod seat, and the other end is hinged to the cleaning seat. One end of the third adjusting telescopic rod is hinged to the bottom of the mounting plate, and the other end is hinged to the connecting rod. The extension and retraction of the third adjusting telescopic rod controls the cleaning seat to be raised or lowered for cleaning operations. A cleaning drive motor is installed on the back of the cleaning seat, and a reducer is installed on the front side of the cleaning seat. The output shaft of the reducer extends downward and is connected to a cleaning turntable. The cleaning turntable is bowl-shaped, and a ring of cleaning bristles is provided around the edge of the cleaning turntable.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a road grader, the scraper assembly of which includes a scraper main plate and two adjustable scraper edge plates; the two scraper edge plates are controlled to extend outward or retract towards the center of the scraper main plate along its length direction by a first adjusting telescopic rod installed on the back of the scraper main plate; in this design, the total length of the scraper assembly can be adjusted, enabling the grading of the ground near the curb. Furthermore, this structure is applicable when the width between two curbs varies within a certain range, expanding the applicability of this road grader.

[0016] Secondly, after the grader's scraper assembly is placed between the two curb stones, a gap must be left between the scraper assembly and the two curb stones on both sides. Otherwise, if the gap between the two curb stones becomes smaller, or if the machine tilts during movement, the scraper assembly may collide with the curb stone or get stuck and unable to move. In this application, an elastic limiting structure is used to connect the movable side scraper to the inner side of the two scraper edge plates. During use, the front edge of the vertical panel approaches or contacts the inner side of the curb stone. During the movement of the equipment, the bottom edge of the vertical panel performs a leveling operation. When the front side of the vertical panel collides or is squeezed against the inner side of the curb stone, the vertical panel can automatically rotate inward to avoid the problem of getting stuck.

[0017] Furthermore, in one improved solution, a rolling wheel is installed on the front edge of the movable side scraper, and the rolling wheel makes rolling contact with the inner surface of the curb stone, which can avoid long-term scraping and wear between the front edge of the movable side scraper and the inner surface of the curb stone.

[0018] Furthermore, in one improved embodiment of this application, guide devices are provided on both sides of the fuselage, and the guide devices roll and limit the movement from the outer side of the curb; thereby constraining the fuselage's travel path and preventing the fuselage from deviating or tilting during travel.

[0019] Furthermore, in one improved solution, a cleaning device is installed on the front side of the front roller. The cleaning device cleans the surface of the curbstone during the movement, ensuring that there is no sand or gravel on the surface of the curbstone, so that the front roller and the rear roller can move smoothly. Attached Figure Description

[0020] Figure 1 The image shows a three-dimensional structural representation of the road grader provided in Embodiment 1 of this application. Figure 1 .

[0021] Figure 2 The image shows a three-dimensional structural representation of the road grader provided in Embodiment 1 of this application. Figure 2 .

[0022] Figure 3 The diagram shown is a schematic representation of the connection structure between the front roller support and the front roller in Embodiment 1 of this application.

[0023] Figure 4 The diagram shown is a schematic representation of the connection structure between the rear roller support and the rear roller in Embodiment 1 of this application.

[0024] Figure 5 The diagram shown is a connection structure diagram of a scraper bracket and a scraper assembly according to Embodiment 1 of this application.

[0025] Figure 6 yes Figure 5 A structural diagram of the middle scraper assembly as viewed from the front.

[0026] Figure 7 The image shows a detailed illustration of a scraper holder and scraper assembly according to this application. Figure 1 .

[0027] Figure 8 The image shows a detailed illustration of a scraper holder and scraper assembly according to this application. Figure 2 .

[0028] Figure 9 The diagram shown is a structural illustration of an improved scraper assembly according to this application.

[0029] Figure 10 yes Figure 9 The diagram shows the structure on the right side of the middle scraper assembly.

[0030] Figure 11 The diagram shown is a schematic representation of the installation structure of the rolling wheel in this application.

[0031] Figure 12 The diagram shown illustrates the positional relationship between the rolling wheel and the curbstone in this application.

[0032] Figure 13 The diagram shown is a structural illustration of the guide devices installed on both sides of the fuselage of this application.

[0033] Figure 14 The diagram shown is a detailed structural representation of the guide device on one side of the fuselage of this application.

[0034] Figure 15 The diagram shown illustrates that the guide wheel in this application is configured as an elastic contact structure.

[0035] Figure 16 yes Figure 15 Structural disassembly diagram.

[0036] Figure 17 The diagram shown is a structural illustration of the cleaning device installed on the front side of the front roller in this application.

[0037] Figure 18 The image shown is a diagram illustrating the installation of the sweeping drive motor of this application on the back of the sweeping base.

[0038] Explanation of reference numerals in the attached drawings: 1. Curbstone; 2. Machine body; 201. Traction unit; 202. Traction rope; 3. Front roller bracket; 301. Front support arm; 4. Front roller; 5. Rear roller bracket; 501. Rear support arm; 6. Rear roller; 7. Scraper bracket; 701. Bracket arm; 702. Clamping plate; 703. Second adjusting telescopic rod; 704. Middle connecting plate; 8. Scraper main plate; 9. Scraper edge plate; 10. First adjusting telescopic rod; 11. Limiting rod; 12. Bolt; 13. Clamping connecting rod; 14. Hinge shaft; 15. Movable side scraper; 1501. Vertical panel; 1502. Top panel; 16. Front connecting plate; 17. Swing shaft; 18. Limiting post; 19. First limiting spring; 20. Limiting groove; 21. 22. Roller wheel, 2201. Vertical rod, 2202. Horizontal rod, 2203. Adjustment limit groove, 23. First mounting seat, 24. Roller shaft, 25. Cylindrical pin; 26. Guide bracket, 27. Guide wheel; 28. Guide mounting seat, 29. Vertical adjusting screw, 30. Vertical guide rod, 31. Nut adjusting bracket, 32. Horizontal telescopic rod; 33. Nut part, 34. Guide arm, 35. First hand crank, 36. Guide wheel shaft; 37. Sliding shaft part, 38. Sliding part, 39. Second limit spring; 40. Mounting plate, 41. Linkage seat, 42. Third adjustment telescopic rod, 43. Linkage member, 44. Sweeping seat, 45. Sweeping drive motor, 46. Reducer, 47. Sweeping turntable, 48. Sweeping brush. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 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 can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] See Figure 1 The image shows a three-dimensional structural representation of the road grader provided in Embodiment 1 of this application. Figure 1 . Figure 2 The image shows a three-dimensional structural representation of the road grader provided in Embodiment 1 of this application. Figure 2 .

[0044] The road grader provided in this application is mainly used for leveling earth and stone excavations during road construction between two parallel curb stones 1. For example... Figure 1 , Figure 2 As shown, the road grader provided in Embodiment 1 of this application mainly includes a rectangular body 2, with two sets of traveling rollers symmetrically arranged at both ends of the body 2. Each set of traveling rollers consists of a front roller bracket 3, a front roller 4, a rear roller bracket 5, and a rear roller 6. Figure 1 As shown, the machine body 2 rolls on two parallel curb stones 1 via rollers at both ends.

[0045] like Figure 3 The diagram shows the connection structure of the front roller bracket 3 and the front roller 4 in Embodiment 1 of this application. The front roller 4 is mounted on the front side of the rectangular machine body 2 via the front roller bracket 3; specifically, the front roller bracket 3 consists of two front support arms 301 connected to the machine body 2 and arranged opposite to each other; the cylindrical front roller 4 is rotatably connected at both ends to the front support arms 301 on both sides. Figure 3 As can be seen from the diagram, in this embodiment, the front roller 4 is located on the front side of the machine body 2, and its length is greater than the width of the curb stone 1. During the construction process of this grader, the front roller 4 rolls on the upper surface of the corresponding curb stone 1, with both ends of the front roller 4 extending beyond the curb stone 1. When the width between the two curb stones 1 increases or decreases within a certain range, the front roller 4 will not detach from the curb stone 1.

[0046] Figure 4The diagram shows the connection structure of the rear roller bracket 5 and the rear roller 6 in Embodiment 1 of this application. The rear roller 6 is mounted on the rear side of the rectangular machine body 2 via the rear roller bracket 5; specifically, the rear roller bracket 5 consists of two rear support arms 501 connected to the machine body 2 and arranged opposite to each other; the cylindrical rear roller 6 is rotatably connected at both ends to the rear support arms 501 on both sides. Figure 4 As can be seen from the diagram, in this embodiment, the rear roller 6 is located on the rear side of the machine body 2, and its length is greater than the width of the curb stone 1. During the construction process of this grader, the rear roller 6 rolls on the upper surface of the corresponding curb stone 1, with both ends of the rear roller 6 extending beyond the curb stone 1. When the width between the two curb stones 1 increases or decreases within a certain range, the rear roller 6 will not detach from the curb stone 1.

[0047] like Figure 1 As shown, the scraper assembly is mounted on the rear side of the fuselage 2 via the scraper bracket 7. Figure 5 The diagram shown is a connection structure diagram of a scraper bracket 7 and a scraper assembly according to Embodiment 1 of this application. Figure 6 yes Figure 5 A structural diagram of the middle scraper assembly as viewed from the front. (See diagram for reference.) Figure 6 As shown in the figure, the scraper assembly in this embodiment includes a scraper main plate 8 and two adjustable scraper edge plates 9. In the embodiment shown in the figure, the scraper main plate 8 and the scraper edge plates 9 are arc-shaped plates. Figure 5 As shown, the upper part of the scraper bracket 7 is connected to the machine body 2, and the lower part of the scraper bracket 7 is connected to the back of the scraper main board 8. A first adjusting telescopic rod 10 is installed on the back of the scraper main board 8; scraper edge plates 9 are movably installed on the back of both sides of the scraper main board 8. The piston rod end of the first adjusting telescopic rod 10 is connected to the back of the scraper edge plates 9. The extension action of the first adjusting telescopic rod 10 controls the two scraper edge plates 9 to extend outward along the length direction of the scraper main board 8, thereby increasing the total length of the scraper main board 8 and the scraper edge plates 9; or, the retraction action of the first adjusting telescopic rod 10 controls the two scraper edge plates 9 to retract towards the middle of the scraper main board 8 along the length direction of the scraper main board 8, thereby shortening the total length of the scraper main board 8 and the scraper edge plates 9. In this design, the total length of the scraper assembly can be adjusted. This structure is applicable when the width between the two curb stones 1 varies within a certain range, thus expanding the applicability of the grader of this application.

[0048] In one specific embodiment, the scraper holder 7 and the scraper assembly can also be designed in the following form. For example... Figure 7 The image shows a detailed illustration of a scraper holder 7 and a scraper assembly according to this application. Figure 1 . Figure 8 The image shows a detailed illustration of a scraper holder 7 and a scraper assembly according to this application. Figure 2First, two long, narrow limiting rods 11 are provided on the back of the scraper mainboard 8. These two limiting rods 11 extend along the length of the scraper mainboard 8 and are arranged parallel vertically. The front side of each long, narrow limiting rod 11 is fixedly connected to the scraper mainboard 8 by several bolts 12. Figure 6 Upon closer inspection, the upper and lower rows of bolts 12 pass through the front side of the scraper main plate 8 and connect to the limiting rod 11. A gap is maintained between the front side of the limiting rod 11 and the back of the scraper main plate 8 to accommodate the scraper edge plates 9 on both sides. Figure 6 , Figure 7 As shown, two scraper edge plates 9 are mounted on the back sides of both sides of the scraper main board 8. The scraper edge plates 9 partially overlap with the scraper main board 8, and the scraper edge plates 9 partially insert into the gap between the front side of the limiting rod 11 and the back side of the scraper main board 8. The scraper edge plates 9 can move within the gap along the length direction of the scraper main board 8.

[0049] A space is formed between the two limiting rods 11, within which the first adjusting telescopic rod 10 can be installed. Specifically, as shown... Figure 7 As shown, the first adjusting telescopic rod 10 can be a double-piston hydraulic cylinder, with the cylinder barrel fixed to the back of the scraper main plate 8, and the ends of the two piston rods connected to the connecting seats on the back of the scraper edge plate 9. Alternatively, two hydraulic cylinders can be used to connect to the scraper edge plates 9 on both sides for separate control. An electric telescopic rod can also be used; this application does not limit its application to this.

[0050] like Figure 7 As shown, the rear side of the limiting rod 11 has a beveled surface, and a long strip-shaped clamping connecting rod 13 is installed on the beveled surface; the clamping connecting rods 13 on the two limiting rods 11 are arranged parallel to each other vertically; the clamping connecting rod 13 is used to connect the scraper bracket 7. Figure 7 , Figure 8 As shown, the scraper bracket 7 consists of two symmetrically arranged bracket arm assemblies and a central connecting plate 704. Each bracket arm assembly comprises an L-shaped bracket arm 701, a triangular clamping plate 702, and a second adjusting telescopic rod 703. The two bracket arms 701 are connected by the central connecting plate 704. The upper end of the bracket arm 701 is connected to the rear side of the machine body 2, and the clamping plate 702 is installed on the inner side of the lower end of the bracket arm 701; specifically, as shown... Figure 8As shown, the two forward-facing corners of the clamping plate 702 are fixedly connected to the two clamping connecting rods 13, respectively. A hinge shaft 14 is provided at the connection between the clamping plate 702 and the lower clamping connecting rod 13, and the lower inner side of the support arm 701 is hinged to the hinge shaft 14. The clamping plate 702, together with the scraper assembly, can rotate around the hinge shaft 14. A second adjusting telescopic rod 703 is provided on the inner side of the support arm 701 for adjusting the scraper assembly; specifically, the piston rod of the second adjusting telescopic rod 703 extends backward and downward and is hinged to the rearward-facing corner of the clamping plate 702; the upper end of the cylinder of the second adjusting telescopic rod 703 is hinged to the rotating shaft on the inner side of the support arm 701.

[0051] Furthermore, after the grader's scraper assembly is placed between the two curb stones 1, a gap must be left between the scraper assembly and the two curb stones 1 on both sides. Otherwise, if the gap between the two curb stones 1 becomes too small, or if the machine body 2 tilts during movement, the scraper assembly may collide with the curb stones 1 or get stuck and unable to move forward; however, this will result in the ground at the gap not being able to be leveled. To solve this technical problem, this application proposes the following improvement scheme.

[0052] like Figure 9 The diagram shown is a structural illustration of an improved scraper assembly according to this application. Figure 10 yes Figure 9 A diagram showing the structure on the right side of the middle scraper assembly. (See diagram for example.) Figure 9 As shown, an elastic limiting structure is used to connect the movable side scraper 15 to the inner sides of the two scraper edge plates 9. Specifically, as... Figure 10 As shown, a front connecting plate 16 extends forward from the outer edge of the scraper edge plate 9, and a vertically mounted swing shaft 17 is provided on the inner side of the front connecting plate 16. The movable side scraper 15 has a vertical panel 1501, the back of which is connected to the swing shaft 17, and the movable side scraper 15 can rotate around the swing shaft 17. The vertical panel 1501 extends forward and outward and extends beyond the front connecting plate 16.

[0053] The elastic limiting structure specifically includes a limiting post 18 and a first limiting spring 19. During installation, a limiting groove 20 is formed on the vertical panel 1501, passing through the vertical panel 1501 and located in front of the swing shaft 17. The limiting groove 20 is perpendicular to the swing shaft 17. The limiting post 18 passes through the limiting groove 20 and is connected to the front connecting plate 16. When the vertical panel 1501 rotates around the swing shaft 17, the limiting groove 20 slides along the limiting post 18. The first limiting spring 19 is installed on the limiting post 18, pressing against the limiting groove 20 to restrict the vertical panel 1501 from rotating inward around the swing shaft 17. Figure 10(In the direction of the middle arrow). During specific installation, the first limiting spring 19 is sleeved on the limiting post 18. The outer surface of the limiting post 18 is provided with external threads. A nut is installed on the limiting post 18. The nut is adjusted towards the vertical panel 1501 side, thereby pressing the first limiting spring 19 into the limiting groove 20.

[0054] When in use, the front edge of the vertical panel 1501 approaches or contacts the inner side of the curbstone 1; during the movement of the equipment, the bottom edge of the vertical panel 1501 is scraped flat; when the front of the vertical panel 1501 collides or is squeezed against the inner side of the curbstone 1, the vertical panel 1501 can automatically rotate inward to avoid it, thereby avoiding the problem of getting stuck.

[0055] Furthermore, in one improved embodiment, a rolling wheel 21 is installed on the front edge of the movable side scraper 15, and the rolling wheel 21 rolls in contact with the inner side of the curbstone 1, which can avoid long-term scraping and wear between the front edge of the movable side scraper 15 and the inner side of the curbstone 1.

[0056] The roller 21 can be installed using the following structure. For example... Figure 11 The diagram shows the installation structure of the roller 21 of this application. The upper edge of the vertical panel 1501 is connected to the top panel 1502, which extends inwards. An L-shaped roller frame 22 is mounted on the top panel 1502. The roller frame 22 consists of a vertical rod 2201 and a horizontal rod 2202. The vertical rod 2201 is a threaded rod and is installed vertically. The vertical rod 2201 passes through a through hole in the top panel 1502 and a first mounting seat 23 on the vertical panel 1501. The bottom of the vertical rod 2201 is vertically connected to the forward-extending horizontal rod 2202. The vertical rod 2201 is fixed at the point where it passes through the top panel 1502 using two nuts, located on the upper and lower sides of the top panel 1502. A vertical roller shaft 24 is mounted at the front end of the horizontal rod 2202, and a rotatable roller 21 is mounted on the roller shaft 24.

[0057] like Figure 12 The diagram shows the positional relationship between the rolling wheel 21 and the curbstone 1 in this application. The rolling wheel 21 makes rolling contact with the inner side of the curbstone 1. In the above structure, the vertical rod 2201 can be adjusted upwards or downwards, and its position is fixed by two nuts, thereby adjusting the height of the rolling wheel 21.

[0058] To prevent the vertical rod 2201 from rotating, such as Figure 11 As shown, a vertical adjustment limiting groove 2203 is provided on the edge of the vertical rod 2201, and the adjustment limiting groove 2203 extends from the top surface of the vertical rod 2201 to the horizontal rod 2202; a vertical cylindrical pin 25 is installed in the circular hole through which the first mounting base 23 is passed, and the cylindrical pin 25 is located in the adjustment limiting groove 2203 to restrict the rotation of the vertical rod 2201.

[0059] The aforementioned grader can be towed forward by a tractor unit in front. Therefore, a traction unit 201 is provided on the front side of the machine body 2, and a traction rope 202 is connected to the traction unit 201 to connect it to the tractor unit. Figure 13 As shown in the image).

[0060] Furthermore, it is difficult to ensure that the machine body 2 does not tilt during the forward movement of the grader, and the scraper assembly on the machine body 2 will tilt accordingly, causing the entire equipment to collide with the curb stone 1. To address this, in one improvement of this application, guide devices are provided on both sides of the machine body 2, and the guide devices roll and limit the movement from the outer side of the curb stone 1.

[0061] like Figure 13 The diagram shown is a structural illustration of the guide devices installed on both sides of the fuselage 2 of this application. The guide devices mainly include guide brackets 26 and guide wheels 27. The guide brackets 26 can be adjusted vertically and horizontally, thereby adjusting the guide wheels 27 to be close to the outer side of the curbstone 1.

[0062] like Figure 14 The diagram shows a detailed structural representation of the guide device on one side of the fuselage 2 of this application. The guide bracket 26 includes a guide mounting base 28, a vertical adjusting screw 29, a vertical guide rod 30, a nut adjusting bracket 31, and a horizontal telescopic rod 32. The connection method of each component is as follows: The guide mounting base 28 is fixedly mounted on the fuselage 2. The rotatable vertical adjusting screw 29 is mounted on the guide mounting base 28. The vertical adjusting screw 29 passes through the guide mounting base 28 and can only rotate, not move up and down. The nut adjusting bracket 31 is mounted on the vertical adjusting screw 29 below the guide mounting base 28. The nut adjusting bracket 31 consists of a nut part 33 in the middle and guide arms 34 symmetrically arranged on both sides. The nut part 33 is threadedly connected to the vertical adjusting screw 29. Vertical guide rods 30 are symmetrically arranged on the nut adjusting bracket 31 and on both sides of the nut part 33. The vertical guide rods 30 pass upward through the through holes on the guide mounting base 28. A first hand crank 35 is provided at the top of the vertical adjusting screw 29, and the nut part 33 moves up and down as the vertical adjusting screw 29 rotates.

[0063] like Figure 14 As shown, each of the two guide arms 34 is equipped with a horizontal telescopic rod 32, with the piston rod of the horizontal telescopic rod 32 facing the side of the machine body 2; a vertical guide wheel shaft 36 is installed at the end of the piston rod, and a guide wheel 27 is installed on the guide wheel shaft 36. The guide wheel 27 is adjusted to move closer to the outer side of the curb stone 1 by means of the horizontal telescopic rod 32. The horizontal telescopic rod 32 can be a hydraulic rod, an electric telescopic rod, or a hand-cranked screw jack.

[0064] The guide devices on both sides of the fuselage 2 adjust in both vertical and horizontal directions to attach two sets of four guide wheels 27 to the outer sides of the two curb stones 1, thereby constraining the travel path of the fuselage 2 and preventing the fuselage 2 from deviating or tilting during travel.

[0065] Furthermore, in an alternative embodiment, the guide wheel 27 is configured with a resilient contact structure, such as... Figure 15 The diagram shown illustrates that the guide wheel 27 of this application is configured as an elastic contact structure. Figure 16 yes Figure 15 The structural disassembly diagram shows that the piston rod end of the horizontal telescopic rod 32 is provided with a sliding shaft portion 37, on which a guide wheel shaft 36 is slidably mounted. Specifically, a sliding portion 38 is provided on the upper part of the guide wheel shaft 36, and the sliding portion 38 has a through hole with a keyway inside; the sliding portion 38 is sleeved on the sliding shaft portion 37 and can move along the axial direction of the sliding shaft portion 37; as shown... Figure 16 As shown, the sliding shaft 37 is connected to the sliding portion 38 on the upper part of the guide wheel shaft 36 by a key. Second limiting springs 39 are provided on the sliding shaft 37 and on both sides of the sliding portion 38. This elastic contact structure of the guide wheel 27 allows for a certain amount of movement in the equipment body 2. This structure, along with the design of the movable side scraper 15, makes the equipment more flexible.

[0066] Furthermore, the front roller 4 and the rear roller 6 travel on the upper surface of the curbstone 1. In order to ensure that there is no sand or gravel on the upper surface of the curbstone 1, the front roller 4 and the rear roller 6 can travel smoothly. In a preferred embodiment, a sweeping device can be provided on the front side of the front roller 4.

[0067] like Figure 17 The diagram shows the structure of the cleaning device installed on the front side of the front roller 4 according to this application. The cleaning device includes a mounting plate 40 located above the front side of the front roller 4. A connecting rod seat 41 and a third adjusting telescopic rod 42 are located below the mounting plate 40. Four connecting rods 43 are arranged in parallel on the connecting rod seat 41. The four connecting rods 43 are arranged in pairs and opposite to each other. One end of each connecting rod 43 is hinged to the connecting rod seat 41, and the other end is hinged to the cleaning seat 44. One end of the third adjusting telescopic rod 42 is hinged to the bottom of the mounting plate 40, and the other end is hinged to the connecting rod 43. The extension and retraction of the third adjusting telescopic rod 42 controls the raising or lowering of the cleaning seat 44 for cleaning operations. A cleaning drive motor 45 is installed on the back of the cleaning seat 44. Figure 18 The diagram shows the sweeping drive motor 45 mounted on the back of the sweeping base 44. The sweeping drive motor 45 is located inside the four connecting rods 43. A reducer 46 is mounted on the front side of the sweeping base 44. The output shaft of the reducer 46 extends downward and is connected to a sweeping turntable 47. The sweeping turntable 47 is bowl-shaped, and a ring of sweeping bristles 48 is provided around its edge. The sweeping device sweeps the upper surface of the curbstone 1 during its movement.

[0068] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A road grader, characterized in that, The machine includes a rectangular body (2), with two sets of traveling rollers symmetrically arranged at both ends. Each set of traveling rollers consists of a front roller bracket (3), a front roller (4), a rear roller bracket (5), and a rear roller (6). The front roller (4) is mounted on the front side of the machine body (2) via the front roller bracket (3), and the rear roller (6) is mounted on the rear side of the machine body (2) via the rear roller bracket (5). The machine body (2) rolls on two parallel curb stones (1) via the front rollers (4) and the rear rollers (6) at both ends. A scraper assembly is mounted on the rear side of the machine body (2) via a scraper bracket (7). The scraper assembly includes a scraper... The scraper main board (8) and two adjustable scraper edge plates (9); the upper part of the scraper bracket (7) is connected to the machine body (2), and the lower part of the scraper bracket (7) is connected to the back of the scraper main board (8); the first adjustment telescopic rod (10) is installed on the back of the scraper main board (8); the scraper edge plates (9) are movably installed on the back of both sides of the scraper main board (8), and the piston rod end of the first adjustment telescopic rod (10) is connected to the back of the scraper edge plate (9). The two scraper edge plates (9) are controlled to expand outward along the length direction of the scraper main board (8) or retract towards the middle of the scraper main board (8) by the action of the first adjustment telescopic rod (10).

2. A road grader according to claim 1, characterized in that, The lengths of the front roller (4) and the rear roller (6) are both greater than the width of the curbstone (1). During the construction of the grader, the front roller (4) and the rear roller (6) roll on the upper surface of the corresponding curbstone (1), and the two ends of the front roller (4) and the rear roller (6) extend beyond the curbstone (1).

3. A road grader according to claim 1, characterized in that, The back of the scraper main board (8) is provided with two long strip-shaped limiting rods (11). The two limiting rods (11) extend along the length direction of the scraper main board (8) and are arranged vertically and horizontally. The middle of the front side of the limiting rod (11) is fixedly connected to the scraper main board (8) by several bolts (12). A gap is maintained between the front side of the limiting rod (11) and the back of the scraper main board (8). Two scraper edge plates (9) are installed on the back of both sides of the scraper main board (8), and the scraper edge plates (9) partially overlap with the scraper main board (8). The scraper edge plates (9) are partially inserted into the gap between the front side of the limiting rod (11) and the back of the scraper main board (8). The scraper edge plates (9) can move in the gap along the length direction of the scraper main board (8).

4. A road grader according to claim 3, characterized in that, A space is formed between the two limiting rods (11), and the first adjusting telescopic rod (10) is installed in the space. The first adjusting telescopic rod (10) adopts a double piston rod hydraulic cylinder, the cylinder is fixed on the back of the scraper main plate (8), and the ends of the two piston rods are connected to the connecting seat on the back of the scraper edge plate (9).

5. A road grader according to claim 3, characterized in that, The rear sides of the two limiting rods (11) are beveled, and long strip-shaped clamping connecting rods (13) are installed on the beveled surfaces. The clamping connecting rods (13) are used to connect the scraper bracket (7). The scraper bracket (7) consists of two sets of symmetrically arranged bracket arm assemblies and a central connecting plate (704). Each bracket arm assembly consists of an L-shaped bracket arm (701), a triangular clamping plate (702), and a second adjusting telescopic rod (703). The two bracket arms (701) are connected by the central connecting plate (704). The upper end of the bracket arm (701) is connected to the rear side of the machine body (2). A clamping plate (702) is installed on the inner side of the lower end of the bracket arm (701); the two front corners of the clamping plate (702) are fixedly connected to two clamping connecting rods (13); a hinge shaft (14) is provided at the connection between the clamping plate (702) and the lower clamping connecting rod (13), and the inner side of the lower end of the bracket arm (701) is hinged to the hinge shaft (14); a second adjusting telescopic rod (703) is provided on the inner side of the bracket arm (701), and the piston rod of the second adjusting telescopic rod (703) extends backward and downward and is hinged to the rear corner of the clamping plate (702); the upper end of the cylinder of the second adjusting telescopic rod (703) is hinged to the rotating shaft on the inner side of the bracket arm (701).

6. A road grader according to claim 1, characterized in that, The outer edge of the scraper edge plate (9) extends forward to form a front connecting plate (16), and a vertically mounted swing shaft (17) is provided on the inner side of the front connecting plate (16); the movable side scraper (15) has a vertical panel (1501), the back of which is connected to the swing shaft (17); the vertical panel (1501) extends forward and outward and beyond the front connecting plate (16); the elastic limiting structure includes a limiting post (18) and a first limiting spring (19); during installation, a limiting groove (20) is opened on the vertical panel (1501) to limit... The limiting groove (20) passes through the vertical panel (1501) and is located in front of the swing shaft (17). The limiting groove (20) is set perpendicular to the swing shaft (17). The limiting post (18) passes through the limiting groove (20) and is connected to the front connecting plate (16). When the vertical panel (1501) rotates around the swing shaft (17), the limiting groove (20) slides along the limiting post (18). The first limiting spring (19) is installed on the limiting post (18). The first limiting spring (19) presses on the limiting groove (20) to restrict the vertical panel (1501) from rotating inward around the swing shaft (17).

7. A road grader according to claim 6, characterized in that, The movable side scraper (15) has a rolling wheel (21) installed on its front edge, and the rolling wheel (21) makes rolling contact with the inner side of the curb.

8. A road grader according to claim 1, characterized in that, The fuselage (2) is provided with guide devices on both sides. The guide devices mainly include guide brackets (26) and guide wheels (27). The guide brackets (26) can be adjusted vertically and horizontally, so that the guide wheels (27) can be adjusted to be close to the outer side of the curb (1).

9. A road grader according to claim 8, characterized in that, The guide bracket (26) includes a guide mounting seat (28), a vertical adjusting screw (29), a vertical guide rod (30), a nut adjusting bracket (31), and a horizontal telescopic rod (32). The guide mounting seat (28) is fixedly mounted on the machine body (2). A rotatable vertical adjusting screw (29) is mounted on the guide mounting seat (28), and the vertical adjusting screw (29) passes through the guide mounting seat (28). A nut adjusting bracket (31) is mounted on the vertical adjusting screw (29) below the guide mounting seat (28). The nut adjusting bracket (31) consists of a nut part (33) in the middle and guide arms (34) arranged symmetrically on both sides. The nut part (33) is threaded. Connected to the vertical adjusting screw (29); vertical guide rods (30) are symmetrically arranged on both sides of the nut part (33) on the nut adjusting bracket (31), and the vertical guide rods (30) pass through the through hole on the guide mounting seat (28) upward; a first hand crank is set at the top of the vertical adjusting screw (29), and the nut part (33) moves up and down with the rotation of the vertical adjusting screw (29); a horizontal telescopic rod (32) is installed on each of the two guide arms (34), and the piston rod of the horizontal telescopic rod (32) faces the side of the machine body (2); the end of the piston rod is installed with a vertical guide wheel shaft (36) through an elastic contact structure, and a guide wheel (27) is installed on the guide wheel shaft (36).

10. A road grader according to claim 1, characterized in that, A cleaning device is provided on the front side of the front roller (4); the cleaning device includes a mounting plate (40) located above the front side of the front roller (4), and a connecting rod seat (41) and a third adjusting telescopic rod (42) are provided below the mounting plate (40); four connecting rods (43) are arranged in parallel on the connecting rod seat (41); the four connecting rods (43) are arranged in pairs and opposite to each other, one end of the four connecting rods (43) is hinged to the connecting rod seat (41), and the other end is hinged to the cleaning seat (44); one end of the third adjusting telescopic rod (42) is hinged to the connecting rod seat (41). The first end is connected to the bottom of the mounting plate (40), and the other end is hinged to the connecting rod (43); the extension and retraction of the third adjusting telescopic rod (42) controls the sweeping seat (44) to be raised or lowered for sweeping operations; a sweeping drive motor (45) is installed on the back of the sweeping seat (44), and a reducer (46) is installed on the front side of the sweeping seat (44). The output shaft of the reducer (46) extends downward and is connected to the sweeping turntable (47). The sweeping turntable (47) is bowl-shaped, and a ring of sweeping bristles (48) is set on the edge of the sweeping turntable (47).

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