Land leveler for road leveling

Abstract

The invention relates to the technical field of scraper components of land levelers, and discloses a land leveler for road leveling, which comprises a traction frame, the right side of the top end of the traction frame is in transmission connection with a lifting oil cylinder on a front rack of the land leveler through a lug seat, a turntable is arranged in the right side of the traction frame, and the bottom end of the turntable is in pin joint with a scraper. A support is fixedly installed at the top end of the rotary disc, an adjusting oil cylinder is fixedly installed in the support, and the output end of the adjusting oil cylinder is in pin joint with the end of the scraper through a linkage frame. According to the land leveler for leveling the road surface, the adjusting oil cylinder, the pin joint piece and the structures on the adjusting oil cylinder, the pin joint piece and the structures on the pin joint piece are arranged, and when the height of a scraper changes due to changes of a roadbed or the road surface, the relative contact position between a conductive block and a resistance coil can be changed; and then the adjusting oil cylinder is triggered to stretch and retract so as to adjust the change of the road surface shearing angle of the scraper, so that the land leveler can keep higher leveling efficiency and precision when leveling different roadbeds or road surfaces.

Description

Technical Field

[0001] This application relates to the technical field of grader blade components, and in particular to a grader for road leveling. Background Technology

[0002] A grader is an important piece of engineering machinery used in earthwork projects to shape and level roadbeds or pavements. It is widely used in large-scale construction projects such as highways, mines, and water conservancy for ground leveling operations. It mainly consists of a drive unit and a scraper assembly. The scraper assembly is hinged to the end of the front frame of the drive unit through a traction frame. The drive unit then drives the scraper assembly, which can move 6 degrees in space, to complete the leveling operation of the roadbed or pavement. In existing graders, the scraper assembly, when leveling roadbeds or surfaces, experiences height differences between the front and rear sections due to variations in road conditions. This necessitates adjusting the scraper assembly and its blades using a lifting cylinder. However, because the blades are curved, the relative height is adjusted using the hinge point between the tow frame and the front frame as the center and the tow frame as the rotating arm. Consequently, the shearing angle of the scraper relative to the road surface changes, significantly impacting the efficiency and accuracy of leveling the roadbed or surface. Furthermore, the change in the scraper's shearing angle increases wasted effort, resulting in poor stability and reliability.

[0003] Therefore, there is an urgent need for a scraper assembly structure for use in road graders to solve the defects of the existing scraper assemblies in actual use. Summary of the Invention

[0004] This application proposes a road grader that can automatically adjust its shearing angle according to changes in the relative height of the scraper. This allows it to maintain high leveling efficiency and accuracy when leveling different roadbeds or road surfaces, and also has the advantages of high mechanical energy conversion efficiency. This addresses the problem in existing road graders where the scraper has an arc-shaped structure. When adjusting the relative height of the scraper, the hinge point between the tow frame and the front frame is used as the center, and the tow frame acts as a rotating arm. Consequently, the shearing angle of the scraper changes with the relative height of the scraper, which greatly affects the leveling efficiency and accuracy of the roadbed or road surface. At the same time, the waste work performed increases as the scraper shearing angle changes.

[0005] To achieve the above objectives, this application adopts the following technical solution: a road grading machine, including a tow frame, a pin connector fixedly installed on the left end of the tow frame and pinned to the front frame of the grader, an ear seat provided on the right side of the top of the tow frame and drivenly connected to the lifting cylinder on the front frame of the grader through the ear seat, a turntable provided inside the right side of the tow frame, and a scraper pinned to the bottom end of the turntable, and a bracket fixedly installed on the top of the turntable, an adjusting cylinder fixedly installed inside the bracket, and the output end of the adjusting cylinder pinned to the end of the scraper through a linkage frame.

[0006] Furthermore, the pin connector includes a bushing fixedly installed at the end of the traction frame. A fixed shaft with both ends milled flat and fixedly installed on the front frame is movably sleeved inside the bushing. A conductive block is fixedly installed on the inner wall of the bushing. Meanwhile, a resistance coil that forms a conductive contact with the conductive block is provided in the middle of the outer surface of the fixed shaft.

[0007] Furthermore, the conductive block, the resistance coil, and the regulating cylinder are connected by an electrical feedback connection through a control system, and the extension and retraction of the regulating cylinder are adjusted by the relative contact position between the conductive block and the resistance coil.

[0008] Furthermore, in the initial state, there is no contact between the conductive block and the resistance coil. During the process of the lifting cylinder on the front frame driving the scraper to move down, the bushing and the conductive block on it are driven to rotate clockwise under the transmission action of the traction frame, which changes the relative contact position between the conductive block and the resistance coil and triggers the bracket to retract to adjust the shearing angle of the scraper on the road surface.

[0009] Furthermore, as the lifting cylinder on the front frame moves the scraper upward, the bushing and its conductive block rotate counterclockwise under the transmission action of the traction frame, changing the relative contact position between the conductive block and the resistance coil, and triggering the bracket to extend to adjust the shearing angle of the scraper on the ground.

[0010] Furthermore, the cross-section of the scraper is designed as a semi-circular structure with a thicker upper part and a thinner lower part, and a detachable strip-shaped serration is provided at the lower end of its inner side.

[0011] Furthermore, the traction frame is designed as an isosceles triangle structure, which effectively increases its structural stability when dragging the scraper to level the roadbed or road surface.

[0012] This invention application has the following technical effects: This application provides a road grading machine. The setting of the adjusting cylinder, pin connector and its structure can cause the relative contact position between the conductive block and the resistance coil to change when the height of the scraper changes due to changes in the roadbed or road surface. This, in turn, triggers the adjusting cylinder to extend and retract to adjust the shear angle of the scraper on the road surface. As a result, the grader can maintain high grading efficiency and accuracy when grading different roadbeds or road surfaces, and has a high efficiency in converting mechanical energy. Attached Figure Description

[0013] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0014] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a schematic diagram of the pin connector of the present invention; Figure 5 This is a schematic diagram of the linkage structure of the scraper of the present invention.

[0015] In the diagram: 1. Traction frame; 2. Pin connector; 3. Ear seat; 4. Turntable; 5. Bracket; 6. Scraper; 7. Adjusting cylinder; 8. Linkage frame; 9. Bushing; 10. Fixed shaft; 11. Conductive block; 12. Resistance coil. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] like Figure 1 , Figure 2 as well as Figure 3As shown, a road grader includes a tow frame 1. A pin connector 2 is fixedly installed on the left end of the tow frame 1 and is pinned to the front frame of the grader. A lug 3 is provided on the right side of the top of the tow frame 1 and is connected to a lifting cylinder on the front frame of the grader through the lug 3. Under the action of the lifting cylinder, the tow frame 1 can be driven to rotate around the pin connector 2. A turntable 4 is provided inside the right side of the tow frame 1, and a scraper 6 is pinned to the bottom of the turntable 4. The relative tilt angle of the scraper 6 can be adjusted through the turntable 4 when needed. A bracket 5 is fixedly installed on the top of the turntable 4. An adjusting cylinder 7 is fixedly installed and connected to the hydraulic pump station on the grader. The output end of the adjusting cylinder 7 is pinned to the end of the scraper 6 through the linkage frame 8. Thus, when the turntable 4 rotates, the scraper 6 and the adjusting cylinder 7 can be rotated synchronously. The linkage structure between the adjusting cylinder 7 and the scraper 6 allows the scraper 6 to change its shearing angle with the ground by adjusting the extension and retraction of the adjusting cylinder 7 under the transmission action of the linkage frame 8 when the relative height of the scraper 6 changes with the actual roadbed or road surface. This ensures that the scraper 6 can maintain high leveling efficiency and accuracy when leveling different roadbeds or road surfaces.

[0018] like Figure 4 As shown, in this technical solution, the pin connector 2 includes a bushing 9 fixedly installed at the end of the traction frame 1. A fixed shaft 10 with both ends milled flat and fixedly installed on the front frame is movably sleeved inside the bushing 9. A conductive block 11 is fixedly installed on the inner wall of the bushing 9. Meanwhile, a resistance coil 12 is provided in the middle of the outer surface of the fixed shaft 10 to form a conductive contact with the conductive block 11.

[0019] like Figure 4 As shown, in this technical solution, the conductive block 11, the resistance coil 12 and the adjusting cylinder 7 are connected by an electrical feedback connection through a control system. The relative contact position between the conductive block 11 and the resistance coil 12 is used to adjust the extension and retraction of the adjusting cylinder 7, thereby adjusting the shearing angle of the scraper 6 on the ground.

[0020] like Figure 4 , Figure 5 As shown, in this technical solution, in the initial state, there is no contact between the conductive block 11 and the resistance coil 12. During the process of the lifting cylinder on the front frame driving the scraper 6 to move down, the bushing 9 and the conductive block 11 on it are driven to rotate clockwise under the transmission action of the traction frame 1, changing the relative contact position between the conductive block 11 and the resistance coil 12, and triggering the bracket 5 to retract to adjust the shearing angle of the scraper 6 on the road surface.

[0021] like Figure 4 , Figure 5As shown, in this technical solution, during the process of the lifting cylinder on the front frame driving the scraper 6 to move upward, the bushing 9 and the conductive block 11 on it are driven to rotate counterclockwise under the transmission action of the traction frame 1, changing the relative contact position between the conductive block 11 and the resistance coil 12, and triggering the bracket 5 to extend to adjust the shearing angle of the scraper 6 on the ground. Furthermore, based on the actual conditions of the leveled roadbed or road surface, the shearing angle of the scraper 6 can be automatically adjusted and controlled by changing the height of the scraper 6. This method is highly operable and controllable, and does not require human intervention in adjusting the shearing angle of the scraper 6.

[0022] In this technical solution, the cross-section of the scraper 6 is designed as a semi-circular structure with a thicker upper part and a thinner lower part, and a detachable strip-shaped serration is provided at the lower end of its inner side, thereby effectively improving the adaptability of the scraper 6 on the grader to the road surface.

[0023] In this technical solution, the traction frame 1 is designed as an isosceles triangle structure, which effectively increases the stability of the structure when dragging the scraper 6 to level the roadbed or road surface.

Claims

1. A road grading machine, comprising a towing frame (1), characterized in that: A pin connector (2) is fixedly installed on the left end of the traction frame (1), and is pinned to the front frame of the grader through the pin connector (2). An ear seat (3) is provided on the right side of the top of the traction frame (1), and is connected to the lifting cylinder on the front frame of the grader through the ear seat (3). A turntable (4) is provided inside the right side of the traction frame (1), and a scraper (6) is pinned to the bottom of the turntable (4). A bracket (5) is fixedly installed on the top of the turntable (4). An adjusting cylinder (7) is fixedly installed inside the bracket (5), and the output end of the adjusting cylinder (7) is pinned to the end of the scraper (6) through the linkage frame (8).

2. The road leveling machine according to claim 1, characterized in that, The pin connector (2) includes a bushing (9) fixedly installed at the end of the traction frame (1). The bushing (9) is movably fitted with a fixed shaft (10) with both ends milled flat and fixedly installed on the front frame. A conductive block (11) is fixedly installed on the inner wall of the bushing (9). Meanwhile, a resistance coil (12) is provided in the middle of the outer surface of the fixed shaft (10) to form a conductive contact with the conductive block (11).

3. The road leveling machine according to claim 2, characterized in that, The conductive block (11), the resistance coil (12), and the regulating cylinder (7) are connected by an electrical feedback system, and the extension and retraction of the regulating cylinder (7) are adjusted by the relative contact position between the conductive block (11) and the resistance coil (12).

4. The road surface grader according to claim 3, characterized in that, In the initial state, the conductive block (11) and the resistance coil (12) do not make contact. During the process of the lifting cylinder on the front frame driving the scraper (6) to move down, the bushing (9) and the conductive block (11) on it are driven to rotate clockwise under the transmission action of the traction frame (1), changing the relative contact position between the conductive block (11) and the resistance coil (12), and triggering the bracket (5) to retract to adjust the shearing angle of the scraper (6) on the road surface.

5. The road surface grader according to claim 3, characterized in that, During the process of the lifting cylinder on the front frame driving the scraper (6) to move upward, the bushing (9) and the conductive block (11) on it are driven to rotate counterclockwise under the transmission action of the traction frame (1), changing the relative contact position between the conductive block (11) and the resistance coil (12), and triggering the bracket (5) to extend to adjust the shearing angle of the scraper (6) on the ground.

6. The road surface grader according to claim 1, characterized in that, The cross-section of the scraper (6) is a semi-circular structure with a thicker upper part and a thinner lower part, and a detachable strip-shaped saw tooth is provided at the lower end of its inner side.

7. The road surface grader according to claim 1, characterized in that, The traction frame (1) is designed as an isosceles triangle structure, which effectively increases the stability of the structure when the scraper (6) is dragged to level the roadbed or road surface.

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