Land leveler for earthwork roadbed construction

Abstract

The invention relates to the technical field related to earthwork machinery, discloses a land leveler for earthwork roadbed construction, and aims to solve the problems that the motion resistance is increased due to soil accumulation and pits are difficult to fill. When an engineering truck pushes the front shovel part to shovel soil, the soil accumulated on the front shovel part is conveyed by the unloading auger and is directly discharged out of the end part of the outer frame, so that the situation that a large amount of soil is accumulated at the front end of the front shovel part is avoided, and the effect of removing chips and obstacles by the auger is achieved. Meanwhile, by means of the double-shovel-part design, after the front shovel part shovels out the soil, the soil enters the space between the front shovel part and the rear shovel part and is stacked, in the process, when the advancing outer frame pushes the soil according to the rear shovel part, the flowing direction of the soil is opposite to the conveying direction of the discharging auger, and therefore when a bumpy road surface is encountered, the conveying direction of the discharging auger is opposite to the conveying direction of the discharging auger. And the rear shovel part is used for pushing the soil to move, so that the pothole pavement is filled and leveled.

Description

Technical Field

[0001] The present invention relates to the technical field related to earthmoving engineering machinery, and in particular to a motor grader for earthmoving engineering roadbed construction. Background Art

[0002] As a core piece of equipment in earthwork and roadbed construction, motor graders are advanced earthmoving machines that combine high precision and versatility. With their flexible and adaptable scraper operation and robust terrain adaptability, they play a vital role in numerous fields, including road construction, farmland improvement, and mining, becoming indispensable core equipment in these sectors.

[0003] Currently, in the actual application of motor graders, their operating method is usually to use the propulsion force of the construction vehicle to move the shovel blade directly forward. During this process, the motor grader relies on the leveling function of the shovel blade to level the ground it passes through, so that the ground reaches a relatively flat state after passing. However, in actual operation scenarios, since the shovel blade continuously shovels the soil in front, this will inevitably lead to soil accumulation in front. As the amount of soil accumulation gradually increases, the resistance encountered by the motor grader during movement will also increase accordingly, which will not only affect construction efficiency, but may also cause additional wear and tear on the equipment.

[0004] In order to deal with this problem, the main method currently used is to tilt the shovel so that the soil scooped up by the shovel can be freely discharged along the slope. Theoretically, this method can indeed slow down the speed of soil accumulation and reduce movement resistance to a certain extent. However, under the complex working conditions of actual applications, this treatment method still has obvious disadvantages. When the soil is continuously transported in one direction along the slope, if a pothole appears at the starting end of the slope, since most of the soil has been pushed away by the slope at this time, it will be difficult to have enough soil to fill the pothole. In this way, the leveled road surface will still have potholes and unevenness, and it will be impossible to achieve the ideal flatness requirements, which will affect the subsequent construction quality and project progress. Summary of the Invention

[0005] This invention proposes a motor grader for earthwork roadbed construction. This grader features an auger for chip removal and two-way soil flow, effectively repairing potholes created during construction. This design aims to address the issues mentioned in the background art above, such as increased resistance to movement due to soil accumulation and the difficulty in filling potholes.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a motor grader for earthwork roadbed construction, comprising: an outer frame, with a front shovel portion provided in the front for shoveling and flattening soil; a discharge auger is provided in the middle of the outer frame and above the front shovel portion, and a chip removal drive source is provided on the outer frame, the output end of the chip removal drive source is connected to the discharge auger through a transmission assembly, and the tail end of the discharge auger extends from one side of the outer frame; when the outer frame moves forward, the front shovel portion shovels out and flattens the soil accumulated in the front, and if too much soil accumulates on the front shovel portion, it is transported by the discharge auger and discharged from one end of the outer frame.

[0007] Furthermore, the front shovel portion is arc-shaped.

[0008] Furthermore, a rear shovel part is provided at the bottom of the outer frame, which is located behind the front shovel part, and the bottoms of the front shovel part and the rear shovel part are horizontally aligned. The unloading auger is located above the gap between the front shovel part and the rear shovel part, and the side of the rear shovel part is an inclined surface. When the rear shovel part moves forward, the direction of the pushed soil is opposite to the direction of the soil transported by the unloading auger.

[0009] Furthermore, a front shaft is movably installed in front of the outer frame, and the front shaft is connected by a transmission component and a chip removal drive source. A gear rack is fixedly installed on the outside of the front shaft, and a plurality of digging teeth are provided on the gear rack.

[0010] Furthermore, there are multiple gear racks, and the multiple gear racks are arranged in a circular shape with equal angles outside the front shaft.

[0011] Furthermore, the side shape of the digging tooth is a right-angled trapezoid.

[0012] Furthermore, a comb plate is fixedly mounted on the end of the outer frame.

[0013] Furthermore, a chip removal pipe is movably installed at the end of the outer frame and at the tail end of the unloading auger.

[0014] Furthermore, an arc groove is provided on the outer side of the chip removal pipe, and a limiting pin located in the arc groove is fixedly installed on the outer frame.

[0015] Furthermore, a driven pulley is fixedly installed at the end of the chip removal pipe, and a reversing pulley connected to the driven pulley through a belt is movably installed on the outer side of the outer frame. A transmission shaft is movably installed on the reversing pulley rotating shaft, and the transmission shaft is connected to the output end of the chip removal drive source; a torque limiter is arranged between the transmission shaft and the chip removal drive source; any one of the gear racks is movably installed on the front shaft, and a spring is connected between the movable gear rack and the front shaft, and a detection component is fixedly installed on the front shaft, and the gear rack compresses the spring and presses against the detection component. When the detection component is pressurized, it will generate an electrical signal and transmit it to the control system. If the detection component fails to transmit an electrical signal to the control system module within a specified time, the control system will cause the chip removal drive source to rotate in the opposite direction.

[0016] The present invention has the following beneficial effects: The present invention provides a motor grader for earthwork roadbed construction. The motor grader features an outer frame equipped with a discharge auger, which is powered by a chip removal drive source. In actual construction scenarios, when the construction vehicle pushes the front shovel to shovel soil, the soil, which would otherwise accumulate in large quantities at the front end of the front shovel, is now transported by the discharge auger and discharged directly and smoothly toward the end of the outer frame. This process effectively prevents large amounts of soil from accumulating at the front end of the front shovel, significantly reducing the resistance to the motor grader's forward movement caused by accumulated soil. This significantly reduces the auger's chip removal and obstacle clearance, eliminating obstacles to the motor grader's efficient operation.

[0017] At the same time, the motor grader of the present application adopts a unique double-shovel design, which consists of a front shovel and a rear shovel arranged in front and back. The two are horizontally aligned and a gap is reserved between them. The rear shovel is designed to be inclined. During the operation of the motor grader, after the front shovel shovels out the soil, the soil will not scatter randomly, but will naturally enter the gap area between the front shovel and the rear shovel and accumulate. As the motor grader continues to move forward, when the outer frame pushes the soil according to the rear shovel, the flow direction of the soil is opposite to the conveying direction of the unloading auger. This opposite flow direction design plays a key role in dealing with potholes. When encountering a pothole road surface, the soil is pushed towards the pothole, and the filling effect of the soil is used to gradually fill the pothole road surface and restore the road surface to a flat state.

[0018] Furthermore, as the unloading auger continuously transports soil, it also replenishes the sloped starting section of the rear shovel. This continuous soil replenishment ensures that the area enclosed by the front and rear shovels always maintains sufficient soil. Sufficient soil on the rear shovel can be used to fill any pits in the starting section, ultimately ensuring effective repair of these pits and significantly improving the quality and efficiency of earthwork roadbed construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] The present invention can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall external front three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall external back three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of a partial cross-sectional view of the overall side structure of the present invention; Figure 4It is a schematic diagram of the overall top view of the three-dimensional structure of the present invention and its soil flow direction.

[0021] In the figure: 1. Outer frame; 2. Front shovel part; 3. Rear shovel part; 4. Unloading auger; 5. Drive shaft; 6. Chip removal drive source; 7. Reversing pulley; 701. Driven pulley; 8. Chip removal pipe; 801. Limit pin; 9. Front shaft; 10. Transmission assembly; 11. Gear rack; 12. Comb plate; 13. Spring; 14. Detection assembly. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] For example 1, please refer to Figure 1 and Figure 2 As can be seen, the outer frame 1 serves as the support for the entire device. Mounting holes at its ends allow it to be fixed to a construction vehicle, allowing the vehicle's powerful power to propel the outer frame 1 forward. A front shovel 2 is located in front of the outer frame 1, shoveling and leveling the soil. When the construction vehicle pushes the front shovel 2 forward, it shovels the soil ahead. As the vehicle moves forward, the soil accumulated in front of the front shovel 2 fills any potholes in the road surface. Because the front shovel 2 in this application is curved, soil accumulates in front of it as it moves forward, increasing the vehicle's forward resistance. To mitigate this forward pressure, a discharge auger 4 is located in the middle of the outer frame 1, above the front shovel 2. A chip removal drive source 6 is also provided on the outer frame 1. This chip removal drive source 6 can be a motor or a gearbox connected to the construction vehicle, as long as it provides a rotationally controllable power output. The specific drive source is selected based on actual needs and is not limited in this application. The output end of the chip removal drive source 6 is connected to the unloading auger 4 according to the transmission component 10. The transmission component 10 is preferably a sprocket drive, but it does not exclude the use of pulleys and other transmission methods. Figure 1 As can be seen in the figure, the tail end of the unloading auger 4 extends from one side of the outer frame 1. In actual use, as the engineering vehicle pushes the outer frame 1 forward, the front shovel unit 2 shovels and levels the soil. The chip removal drive source 6, based on the transmission assembly 10, can continuously rotate the unloading auger 4, thereby quickly transporting the soil accumulated in front of the front shovel unit 2 to its tail end, so that the soil is directly discharged from one end of the outer frame 1, thereby avoiding the problem of large movement resistance caused by soil accumulation in front of the front shovel unit 2.

[0024] Moreover, this application adopts a unique double shovel design, combined with Figure 3 It can be seen that the bottom of the outer frame 1 is provided with a rear shovel part 3 located behind the front shovel part 2, and the bottoms of the front shovel part 2 and the rear shovel part 3 are horizontally aligned, with a gap between them, and the unloading auger 4 is located at the top of the gap. More importantly, the side of the rear shovel part 3 is an inclined surface, and when the rear shovel part 3 moves forward, that is, Figure 3 When the rear shovel part 3 shown in the figure moves to the left, the soil will tend to move to one side after being pushed by the rear shovel part 3, that is, to move in the direction close to the transmission assembly 10. In actual application, when the engineering vehicle pushes the outer frame 1 forward, initially, there is no soil filling in the front shovel part 2 and the rear shovel part 3. When the soil generated by the front shovel part 2 moves toward the unloading auger 4, the soil will fall into the area between the front shovel part 2 and the rear shovel part 3 after passing through the unloading auger 4 for temporary storage. After the front shovel part 2 and the rear shovel part 3 are filled with soil, the soil can no longer be adjusted to this area. Afterwards, since the soil will no longer fall to the bottom through the unloading auger 4, the rotating unloading auger 4 will directly output the excess soil from the end of the outer frame 1 to the outside, avoiding a large amount of soil accumulation in front of the front shovel part 2.

[0025] At the same time, as the front shovel part 2 and the rear shovel part 3 advance, the inclined surface on the rear shovel part 3 tends to push the soil to move. Figure 4 As shown, the soil that enters the area between the front shovel 2 and the rear shovel 3 is pushed by the inclined surface of the rear shovel 3 and tends to move to the right. Therefore, when the rear shovel 3 reaches a pothole, the soil in front of the rear shovel 3 can fill and level it when the rear shovel 3 passes over the pothole. As for the soil near the starting section of the left end of the rear shovel 3, the unloading auger 4 can discharge the soil accumulated in front of the front shovel 2, and the unloading auger 4 moves the soil to the left, which is opposite to the direction of conveying the soil on the inclined surface of the rear shovel 3. Therefore, the unloading auger 4 can continuously discharge the soil outward on the one hand, and on the other hand, it can also replenish the soil in the area of ​​the starting section of the inclined surface of the rear shovel 3. This is not limited to this. If a pothole appears in the middle of the rear shovel 3, the soil in the middle will fall downward. After the soil at the bottom of the unloading auger 4 falls, it can also be replenished autonomously.

[0026] The second embodiment is a further improvement on the first embodiment. Figure 1-Figure 3It can be seen that since the soil may also include some large particles of stones, if the front shovel part 2 is used for shoveling directly, the stones may get stuck in the unloading auger 4 or the area between the front shovel part 2 and the rear shovel part 3, which can easily lead to poor subsequent soil discharge. Therefore, in the second embodiment, a front shaft 9 is movably installed in front of the outer frame 1, and the front shaft 9 is connected to the chip removal drive source 6 by a transmission component 10. When the chip removal drive source 6 starts working, the transmission component 10 can simultaneously drive the unloading auger 4 and the front shaft 9 to rotate synchronously. There is a tooth rack 11 fixedly installed on the outside of the front shaft 9 by bolts, and there are multiple tooth racks 11. The multiple tooth racks 11 are arranged in a ring at equal angles on the outside of the front shaft 9. In more detail, each tooth rack 11 is provided with a plurality of digging teeth, and the side shape of the digging teeth is a right-angled trapezoid. In actual application, when the engineering vehicle drives the outer frame 1 forward, the chip removal drive source 6 drives the transmission component 10 to make the unloading auger 4 and the front shaft 9 rotate clockwise synchronously. As the front shaft 9 rotates, the digging teeth on the gear rack 11 can comb the ground in front of the front shovel part 2. Figure 3 As shown, the bottom of the gear frame 11 and the bottom of the front shovel section 2 are both in a straight line. The gear frame 11 rotates clockwise to first sort and sieve the soil, thereby pushing out large particles in the soil. Afterwards, when the front shovel section 2 passes through the sorted soil, it can shovel it and transport it to the unloading auger 4. Then, the unloading is carried out according to the above process and the soil in the front shovel section 2 and the rear shovel section 3 area is replenished.

[0027] Furthermore, as the rack 11 rotates clockwise, the dislodged rocks are thrown forward, moving them relatively away from the front shovel unit 2. However, the rocks are still thrown in the direction of the front shovel unit 2's forward motion. Later, when the front shovel unit 2 encounters a pothole, some of the rocks thrown by the rack 11 fill the pothole. Because rocks are strong and hard, filling the potholes with them first provides a solid support framework for the entire road surface structure. When subjected to pressure from heavy objects such as vehicles, the rocks effectively disperse the pressure, reducing the possibility of road surface subsidence and deformation, and significantly enhancing the road's load-bearing capacity.

[0028] On this basis, according to Figure 1-Figure 3 As can be clearly seen in the figure, a comb plate 12 is fixedly mounted on the end of the outer frame 1. When the tooth frame 11 rotates, the comb plate 12 can pass between the digging teeth, thereby clearing stones stuck between the digging teeth. At the same time, the comb plate 12 blocks stones from being thrown toward the rear portion of the front shovel 2. To prevent stones from being thrown, bolt holes are reserved at the top of the comb plate 12 in actual use, so that a baffle of appropriate height can be installed according to actual needs.

[0029] The third embodiment is a further improvement on the second embodiment. Figure 2 It can be clearly seen that a chip discharge tube 8 is movably mounted at the end of the outer frame 1 and located at the tail end of the discharge auger 4. This tube 8 can only rotate along the central axis of the discharge auger 4. Specifically, the angle of rotation is limited by an arc groove formed on the outer side of the chip discharge tube 8, and a stop pin 801 fixedly mounted on the outer frame 1, which is located in the arc groove. The length of the arc groove corresponds to the deflection range of the chip discharge tube 8. When the chip discharge tube 8 reaches its limit of deflection, the end of the arc groove abuts the stop pin 801, ultimately limiting the angular deflection of the chip discharge tube 8. Because the chip discharge tube 8 is approximately L-shaped, after the discharge auger 4 transports soil to the chip discharge tube 8, the chip discharge tube 8 can be used to transport the soil in a direction further away from the outer frame 1. It should be noted that the tail end of the discharge auger 4 is located within the chip discharge tube 8, ensuring that the soil inside the chip discharge tube 8 has sufficient strength to be discharged when the discharge auger 4 transports soil.

[0030] In addition, a driven pulley 701 is fixedly installed at the end of the chip removal pipe 8. Correspondingly, a reversing pulley 7 is movably installed on the outer side of the outer frame 1 and is connected to the driven pulley 701 through a belt. A transmission shaft 5 is movably installed on the rotating shaft of the reversing pulley 7, and the transmission shaft 5 is connected to the output end of the chip removal drive source 6. In the actual arrangement, a torque limiter is also provided between the transmission shaft 5 and the chip removal drive source 6. Therefore, when the torque of the reversing pulley 7 is too large, the power output can be automatically cut off. And, according to Figure 3 It can be seen that any one of the gear racks 11 is movably mounted on the front shaft 9, and the gear rack 11 can move radially along the front shaft 9. Moreover, a spring 13 is connected between the gear rack 11 and the front shaft 9. The gear rack 11 is pushed out by the elastic force of the spring 13, and is at the same extended length as the fixedly mounted gear rack 11.

[0031] A detection assembly 14 is fixedly mounted on the front shaft 9. When the gear rack 11 is pushed outward by the spring 13, the pressure on the detection assembly 14 is released, and the detection assembly 14 is placed in an unconnected state. When the gear rack 11 compresses the spring 13 and contacts the detection assembly 14, the pressure on the detection assembly 14 generates an electrical signal, which is transmitted to the control system module, which is generally installed on the corresponding engineering vehicle. During operation, if the detection assembly 14 does not transmit the electrical signal to the control system module within the specified time, the control system will reverse the rotation of the chip removal drive source 6.

[0032] Specifically, refer to Figure 3As shown, when the engineering vehicle pushes the outer frame 1 forward, the chip removal drive source 6 drives the unloading auger 4 and the front shaft 9 to rotate clockwise. At the same time, the output end of the chip removal drive source 6 drives the transmission shaft 5 to rotate clockwise, so that the chip removal pipe 8 is arranged horizontally. Afterwards, the front shaft 9 drives the gear rack 11 to first comb the soil in front, thereby digging out the stones and throwing them out. During this process, since the outer frame 1 continues to move forward, when the movable gear rack 11 contacts the soil, the gear rack 11 pushes according to the inclined surface of the gear rack 11, causing the gear rack 11 to press the detection component 14. Therefore, during the rotation of the front shaft 9, the detection component 14 will be periodically pressed and transmit an electrical signal to the control system. Therefore, the control system will cause the chip removal drive source 6 to continue to rotate clockwise. The unloading auger 4 transports the soil into the chip removal pipe 8 and discharges it to the outside.

[0033] When the rear shovel part 3 moves to a deeper pothole, the operator stops the forward movement of the engineering vehicle. As the gear rack 11 continues to rotate, the movable gear rack 11 is no longer pushed by the soil, and thus will not squeeze the detection component 14. When the control system does not receive a signal within the rated time, it will drive the chip removal drive source 6 to rotate in the opposite direction. At this time, the unloading auger 4, the transmission shaft 5 and the front shaft 9 rotate in the opposite direction synchronously, and the chip removal pipe 8 changes from horizontal to vertical movement. The soil stored in the chip removal pipe 8 returns through the unloading auger 4. When the unloading auger 4 transports the soil toward the chip removal drive source 6, the soil on the pit will naturally fall off and make the bottom of the unloading auger 4 suspended. After the unloading auger 4 transports the soil to the suspended position, it can focus on irrigating the deep pit so that the deep pit will also be filled with soil.

Claims

1. A motor grader for earthwork roadbed construction, characterized in that: include: The outer frame (1) is provided with a front shovel portion (2) at the front for shoveling and leveling the soil; a discharge auger (4) is provided in the middle of the outer frame (1) and above the front shovel portion (2), and a chip removal drive source (6) is provided on the outer frame (1); the output end of the chip removal drive source (6) is connected to the discharge auger (4) through a transmission assembly (10), and the tail end of the discharge auger (4) extends from one side of the outer frame (1); When the outer frame (1) moves forward, the front shovel part (2) shovels out the soil accumulated in front and flattens it. If too much soil is accumulated on the front shovel part (2), it is transported by the unloading auger (4) and discharged from one end of the outer frame (1).

2. The motor grader for earthwork roadbed construction according to claim 1, characterized in that: The front shovel portion (2) is arc-shaped.

3. The motor grader for earthwork roadbed construction according to claim 1, characterized in that: The bottom of the outer frame (1) is provided with a rear shovel part (3) located behind the front shovel part (2), and the bottoms of the front shovel part (2) and the rear shovel part (3) are horizontally aligned. The unloading auger (4) is located above the gap between the front shovel part (2) and the rear shovel part (3), and the side of the rear shovel part (3) is an inclined surface. When the rear shovel part (3) moves forward, the direction of the soil pushed is opposite to the direction of the soil transported by the unloading auger (4).

4. The motor grader for earthwork roadbed construction according to claim 3, characterized in that: A front shaft (9) is movably mounted in front of the outer frame (1), and the front shaft (9) is connected to the chip removal drive source (6) by a transmission assembly (10). A gear rack (11) is fixedly mounted outside the front shaft (9), and a plurality of digging teeth are arranged on the gear rack (11).

5. The motor grader for earthwork roadbed construction according to claim 4, characterized in that: There are multiple gear racks (11), and the multiple gear racks (11) are arranged in a circular shape at equal angles outside the front shaft (9).

6. The motor grader for earthwork roadbed construction according to claim 4, characterized in that: The side shape of the digging teeth is a right-angled trapezoid.

7. The motor grader for earthwork roadbed construction according to claim 4, characterized in that: A comb plate (12) is fixedly mounted on the end of the outer frame (1).

8. The motor grader for earthwork roadbed construction according to claim 4, characterized in that: A chip removal pipe (8) is movably mounted at the end of the outer frame (1) and at the tail end of the unloading auger (4).

9. The motor grader for earthwork roadbed construction according to claim 8, characterized in that: An arc groove is provided on the outer side of the chip removal pipe (8), and a limiting pin (801) located in the arc groove is fixedly mounted on the outer frame (1).

10. The motor grader for earthwork roadbed construction according to claim 1, characterized in that: A driven pulley (701) is fixedly mounted on the end of the chip removal pipe (8), a reversing pulley (7) is movably mounted on the outer side of the outer frame (1) and is connected to the driven pulley (701) via a belt, a transmission shaft (5) is movably mounted on the rotating shaft of the reversing pulley (7), and the transmission shaft (5) is connected to the output end of the chip removal drive source (6); A torque limiter is provided between the transmission shaft (5) and the chip removal drive source (6); Any one of the gear racks (11) is movably mounted on the front shaft (9), a spring (13) is connected between the movable gear rack (11) and the front shaft (9), a detection assembly (14) is fixedly mounted on the front shaft (9), the gear rack (11) compresses the spring (13) and presses against the detection assembly (14), the detection assembly (14) generates an electrical signal when it is compressed and transmits it to the control system, and if the detection assembly (14) does not transmit the electrical signal to the control system module within a specified time, the control system will cause the chip removal drive source (6) to rotate in the reverse direction.

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