A two-layer section folding field leveling and furrowing device

Abstract

The application discloses a double-layer section folding field leveling and ditching device and relates to the technical field of agricultural machinery. The device comprises a frame, a first leveling section fixed on the frame, two side-hinged second and third leveling sections, and first and second folding driving members. A connecting assembly is arranged between the end faces of the adjacent leveling sections and comprises a connecting block, a connecting groove, a rubber belt and an air pump. The connecting block is of a hollow structure and is provided with a communication groove and a slanting air jet hole. During the unfolding and inserting process, the air pump first inflates and sprays high-pressure air flow outward from the air jet hole and the communication groove to blow and eliminate the silt impurities in the end face and the groove. After complete insertion, the rubber belt forms a sealed cavity, the air pump is switched to an air extraction state, and the adjacent leveling sections are rigidly abutted under the action of external atmospheric pressure to eliminate the hinged gap. The front end of the ditching shovel is provided with a V-shaped obliquely arranged anti-collision guard plate. The application solves the problem of bending stiffness attenuation caused by the accumulated virtual position of the folding pin shafts of multiple sections and has the functions of silt self-cleaning and ditching anti-collision.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a double-layered folding field leveling and ditching device. Background Technology

[0002] To simultaneously meet the width restrictions of wide-width operations and highway transportation, existing field leveling and ditching equipment generally adopts a hydraulically driven single-section folding frame. Its working principle is as follows: the frame is pushed forward by the traction device, the front section leveling shovel flattens the ground surface, and the rear section ditcher digs irrigation and drainage ditches; when moving to another location, the side wings are flipped and folded by the hydraulic cylinder to reduce the lateral size of the whole machine.

[0003] As the required working width increases further (e.g., to 6 meters or more), the traditional single-section folding method is insufficient to meet the requirements for folded volume. If the structure is directly expanded into a multi-section (e.g., three-section) folding structure by adding hinge nodes, the following serious defects will exist in actual operation: First, the multi-segment folding introduces multiple hinge nodes, and the cumulative machining and assembly gaps between each pin and bushing result in a significant decrease in the overall bending stiffness of the frame after it is unfolded. Second, during operation, the shovel plate bears enormous soil cutting resistance, which amplifies the gaps at multiple hinge points, causing the unfolded leveling shovel to bend in a "backward arc" shape, severely compromising the accuracy of field leveling. Furthermore, the existing structure lacks a rigid locking and load-sharing mechanism for the hinge nodes, with most of the huge soil bending moment and impact force concentrated on the hinge pins, which can easily lead to the pins bending or even shearing and becoming unusable, resulting in high equipment maintenance costs. Summary of the Invention

[0004] To solve the above problems, the present invention provides the following technical solution: a double-layered folding field leveling and ditching device, comprising: The frame is used to connect the leveling and trenching device to the vehicle body; The first leveling section is fixedly installed on the frame; Two second leveling sections are distributed on both sides of the first leveling section, and both are hinged to the first leveling section; Two third leveling sections correspond one-to-one with two second leveling sections. The two third leveling sections are also distributed on both sides of the first leveling section, and the third leveling sections are hinged to the side of the second leveling section away from the first leveling section. The first folding drive is used to drive the two second flat sections to fold or unfold around the first flat section; The second folding drive is used to drive the third flat section to fold or unfold around the corresponding second flat section. The connecting assembly includes a connecting block disposed on one end face of a flat section and a connecting groove disposed on the end face of an adjacent flat section. The connecting block can be inserted into the connecting groove, and a sealing element and a negative pressure suction element are provided between the connecting block and the connecting groove to form a sealed negative pressure cavity after the connecting block is inserted into the connecting groove, so that the adjacent flat sections are rigidly abutted under the action of external atmospheric pressure.

[0005] Preferably, the connecting block has a hollow structure, and the negative pressure suction device includes an air source and a connecting groove opened at the end of the connecting block, the connecting groove connecting the internal space of the connecting block with the outside. The sidewall of the connecting block is provided with several air vents that communicate with the internal space. The air source is configured such that: before the connecting block is fully inserted into the connecting groove, the air source fills the connecting block with high-pressure gas, and the gas is ejected outward from the jet hole and the connecting groove to blow away impurities in the connecting groove and on the end face of the connecting groove; after the connecting block is fully inserted into the connecting groove and the sealing element is pressed, the air source switches to the suction state, so that the cavity enclosed by the sealing element forms a negative pressure locking state.

[0006] Preferably, the sidewall of the connecting block is also provided with a plurality of arrayed jet holes, and the plurality of jet holes are all connected to the internal space of the connecting block. The plurality of jet holes are all inclined along the direction close to the contact surface of the second flat section, and the gas ejected from the jet holes blows the surface of the connecting block and the end face where the connecting block is located.

[0007] Preferably, the wall of the connecting groove is set as an outward-facing arc surface, and the side wall of the connecting block is also set as a corresponding arc surface. When the connecting block is inserted into the connecting groove, the side wall of the connecting block and the wall of the connecting groove form an airflow channel.

[0008] Preferably, the sealing element is a rubber strip, which is disposed on the wall of the connecting groove. When the connecting block is fully inserted into the connecting groove, the rubber strip seals the connecting groove and several air jet holes within the connecting groove.

[0009] Preferably, the frame is further provided with a detection component for detecting the internal pressure of the connecting block. The detection component is located at the output end of the drive source. The detection component includes a pressure sensor. The pressure sensor determines whether the connecting component rigidly connects the first flat section, the second flat section, and the third flat section based on the measured value.

[0010] Preferably, it also includes a trenching component, which includes a trenching shovel and a collision avoidance diverter disposed at the front end of the trenching shovel in the direction of travel. The trenching shovel is disposed on the second leveling section, and the bending avoidance surface of the collision avoidance diverter extends obliquely to both sides along the direction of travel to intercept hard obstacles in the travel path.

[0011] Preferably, the anti-collision diversion component includes a first guard plate and a second guard plate. The first guard plate is fixedly installed on the first leveling section, and the second guard plate is fixedly installed on the second leveling section. When the device is in the unfolded state, the first guard plate and the second guard plate are arranged in a V-shape symmetrically inclined along the direction close to the trenching shovel, and a soil guiding and flow-avoiding channel is left between the ends of the first guard plate and the second guard plate to allow some soil to pass through.

[0012] This invention provides a double-layered, foldable field leveling and ditching device. It has the following beneficial effects: I. This invention, by setting up a double-layer folding structure consisting of a first leveling section, a second leveling section, and a third leveling section, in conjunction with a first folding drive component and a second folding drive component, enables the device to have a large working capacity when unfolded and to reduce its lateral size when folded, thus meeting the width restrictions for road transport. At the same time, by setting a connecting assembly consisting of a connecting block, a connecting groove, a sealing component, and a negative pressure suction component between the end faces of adjacent leveling sections, a sealed negative pressure cavity is formed after the connecting block is inserted into the connecting groove. The external atmospheric pressure is used to forcefully press and abut the adjacent leveling sections together, eliminating the problem of stiffness reduction caused by the accumulation of pin assembly gaps at the joints of multiple sections. This effectively avoids the leveling shovel from developing a backward-tilting arc-shaped bend when subjected to working force, ensuring the accuracy of field leveling and significantly reducing the concentrated shear stress on the hinge pins. II. This invention configures the connecting block as a hollow structure with air jet holes and a connecting groove, and with a switchable air source, realizes the sequential action of positive pressure purging before full insertion and negative pressure locking after full insertion and pressing the sealing element; during the unfolding and insertion process of the flat section, high-pressure gas is forcefully ejected outward along the inclined air jet holes and arc-shaped airflow channels, which can automatically purge and remove mud, sand, weeds and other impurities adhering to the inner wall and end face of the connecting groove, and avoid impurities getting stuck in the gap, which would prevent the end face from fitting; when the connecting block is fully inserted, the rubber band seals the connecting groove and air jet holes inside the connecting groove, so that the effect of rigid connection by using pressure difference can be realized. Therefore, this device has good mud and sand self-cleaning ability and high reliability locking rigidity; Third, by setting a detection component including a pressure sensor at the output end of the drive source, the present invention can monitor the pressure state of the internal space of the connecting block in real time, and determine whether a reliable rigid lock has been achieved between each leveling section by the pressure value, providing operation feedback for the operator and avoiding mechanical damage caused by forced operation in an unlocked state. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional view of the overall structure of an embodiment of this application; Figure 3 Figure 2 Enlarged structural diagram at point A; In the diagram: 1. Frame; 2. First leveling section; 3. Second leveling section; 4. Third leveling section; 5. First folding drive component; 6. Second folding drive component; 7. Connecting assembly; 71. Connecting block; 72. Connecting groove; 73. Sealing component; 74. Negative pressure extraction component; 741. Connecting groove; 742. Jet nozzle; 743. Air source; 744. Air passage; 8. Detection assembly; 9. Trenching assembly; 91. Trenching shovel; 92. Anti-collision diverter; 921. First guard plate; 922. Second guard plate. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0015] like Figures 1-3 As shown, the present invention provides a technical solution: a double-layer folding field leveling and ditching device, comprising a frame 1, a first leveling section 2, a second leveling section 3, a third leveling section 4, a first folding drive component 5, a second folding drive component 6, and a connecting component 7.

[0016] In this embodiment, the frame 1 is a rigid frame. In actual use, the upper end of the frame 1 is fixedly connected to the vehicle body by bolts. The first flat section 2 is fixedly connected to the lower end of the frame 1. In this embodiment, there are two second flat sections 3, which are arranged opposite each other on both sides of the first flat section 2. Both second flat sections 3 are hinged to the first flat section 2 by pins. In this embodiment, there are also two third flat sections 4, which correspond one-to-one with the two second flat sections 3. The two third flat sections 4 are also distributed on the first flat section 2. The first leveling section 2 is connected to the second leveling section 3 on the side away from the first leveling section 2. In this embodiment, the lower end surfaces (i.e. working surfaces) of the first leveling section 2, the second leveling section 3, and the third leveling section 4 are all set as arc surfaces. When the device is in the unfolded state, the first leveling section 2, the two second leveling sections 3, and the two third leveling sections 4 are in the same horizontal state, and the bottom surfaces of the first leveling section 2, the two second leveling sections 3, and the two third leveling sections 4 are all spliced ​​into a long arc surface (working surface) in order to achieve high-efficiency leveling of the soil.

[0017] In this embodiment, the first folding drive component 5 includes two hydraulic rods. The two hydraulic rods are arranged opposite each other on both sides of the frame 1 and are located above the first flattening section 2. The two hydraulic rods in the first folding drive component 5 correspond one-to-one with the two second flattening sections 3. The hydraulic rods are hinged to the frame 1, and the output end of the hydraulic rod is hinged to its corresponding second flattening section 3.

[0018] Similarly, the second folding drive unit 6 in this embodiment also includes two hydraulic rods. The two hydraulic rods of the second folding drive unit 6 correspond one-to-one with the two second flat sections 3. The hydraulic hinges in the second folding drive unit 6 are arranged on the corresponding second flat sections 3, and the output end of the hydraulic rod is hinged to the corresponding third flat section 4.

[0019] In this embodiment, multiple sets of connecting components 7 are provided. They are located between the contact end faces of the first flat section 2 and the second flat section 3, and between the contact end faces of the second flat section 3 and the third flat section 4. The connecting components 7 in this embodiment include a connecting block 71 disposed on the end face of one of the flat sections and a connecting groove 72 disposed on the end face of the adjacent flat sections. When the two adjacent flat sections are in the unfolded state, the connecting block 71 can be inserted into the connecting groove 72. A sealing element 73 and a negative pressure suction element 74 are provided between the connecting block 71 and the connecting groove 72. The sealing element 73 enables the connecting groove 72 to become a sealed negative pressure chamber after the connecting block 71 is inserted into the connecting groove 72. Then, the air in the negative pressure chamber is extracted by the negative pressure suction element 74, so that the inside of the negative pressure chamber is in a low-pressure vacuum state, thereby making the adjacent flat sections rigidly abut against each other under the action of external atmospheric pressure.

[0020] Before the device is deployed to the field, the user simultaneously activates two hydraulic rods in the first folding drive 5 and two hydraulic rods in the second folding drive 6. The hydraulic rods in the first folding drive 5 extend, causing the corresponding second leveling section 3 to flip downwards until it is flush with the first leveling section 2 and the connecting block 71 is inserted into the connecting groove 72. Similarly, the hydraulic rods in the second folding drive 6 extend, causing the corresponding third leveling section 4 to flip downwards until it is flush with the second leveling section 3 and the connecting block 71 is inserted into the connecting groove 72. At this point, all the first leveling sections 2, second leveling sections 3, and third leveling sections 4 are at the same horizontal level, and adjacent leveling sections are in a preliminary contact state. There may still be gaps between adjacent leveling sections, so the overall connection strength of the leveling sections is not high. At this time, the negative pressure extraction component 74 of the air cylinder can extract the gas from the negative pressure chamber in the adjacent connecting groove 72, thereby achieving a negative pressure or vacuum state in the negative pressure chamber. Therefore, under the action of atmospheric pressure, the adjacent leveling sections will be squeezed by atmospheric pressure and move in the direction of mutual approach, thereby making the adjacent leveling sections press against each other, which greatly improves the connection strength and rigidity of the overall leveling section. That is, when the device is used in the field, it is difficult for the adjacent leveling sections to be misaligned and shaken, and the pins at the hinges between the adjacent leveling sections are difficult to be subjected to shear stress, thus ensuring the overall stability of the device. At the same time, the difficulty in misalignment and shaking between the adjacent leveling sections allows the bottom surface of the overall leveling section to be a relatively smooth surface. Therefore, when leveling the soil in the field, it is difficult to cause continuous unevenness in the soil, thus greatly improving the leveling accuracy of the device.

[0021] Specifically, in this embodiment, connecting blocks 71 are fixedly installed on both sides of the second leveling section 3. The connecting block 71 on the left is directly opposite to the third leveling section 4 on the left, and the connecting block 71 on the right is directly opposite to the third leveling section 4 on the right. The connecting blocks 71 are hollow structures, and an air passage 744 is opened inside the steel frame 1 of the second leveling section 3. The air passage 744 is connected to the inside of the connecting blocks 71 located on both sides of the second leveling section 3. The negative pressure air extraction component 74 includes an air source 743. In this embodiment, the air source 743 is preferably a bidirectional air pump that has both air extraction and air filling functions. The output end of the air pump is sealed and connected to the gas passage inside the second leveling section 3 through an air pipe to realize centralized air supply and air extraction.

[0022] In this embodiment, the end face of the connecting block 71 facing the connecting groove 72 has a connecting groove 741 that communicates with the internal space of the connecting block 71. In this embodiment, the connecting block 71 and the connecting groove 741 are arranged along the cross-sectional length of the second flat section 3, so the corresponding connecting groove 72 is also arranged along the cross-sectional length. In this embodiment, several air jet holes 742 communicating with the internal space are opened on the side wall of the connecting block 71. In this embodiment, the angles of the air jet holes 742 and the connecting groove 741 are specially set so that in the connecting block Before the connecting block 71 is fully inserted into the connecting groove 72, the air source 743 fills the connecting block 71 with high-pressure gas. The gas is sprayed out from the jet hole 742 and the connecting groove 741 to blow away impurities in the connecting groove 72 and the end face of the connecting groove 72. The gas sprayed from the jet hole 742 blows away the surface of the connecting block 71 and the end face of the connecting block 71. After the connecting block 71 is fully inserted into the connecting groove 72 and the sealing member 73 is pressed, the air source 743 switches to the suction state, so that the cavity surrounded by the sealing member 73 forms a negative pressure locking state.

[0023] It should be noted that even when the connecting block 71 is fully inserted into the connecting groove 72, the connecting groove 741 on the connecting block 71 has not yet come into contact with the groove wall of the connecting groove 72. That is, part of the space in the connecting groove 72 serves as a negative pressure chamber so that the second flat section 3 and the third flat section, or the second flat section 3 and the third flat section 4, can be connected under negative pressure in the future.

[0024] Therefore, when the device enters the flattening state, impurities on the connecting block 71 on the second flattening section 3 and on the end face of the connecting block 71 are removed by the gas ejected from the jet hole 742. Impurities in the connecting groove 72 on the third flattening section 4 and the first flattening section 2 and on the end face of the connecting groove 72 are removed by the gas ejected from the connecting groove 741. Before the first flattening section 2, the second flattening section 3 and the third flattening section 4 are completely flat and initially in contact, the impurities on the end faces of the first flattening section 2, the second flattening section 3 and the third flattening section 4 that are in contact with each other have been completely cleaned. Therefore, when the first flattening section 2, the second flattening section 3 and the third flattening section 4 are subsequently pressed together by negative pressure, no impurities will be stuck in the gaps between the first flattening section 2, the second flattening section 3 and the third flattening section 4. Therefore, the gas purging mode can avoid the damage of impurities to the high rigidity of the flattening section, thus ensuring the stability of the flattening section's performance.

[0025] In this embodiment, the connecting groove 741 is inclined upwards, allowing the blown gas to be ejected obliquely upwards. Since the second flattening section 3 is hinged to the first flattening section 2, and the second flattening section 3 is hinged to the third flattening section 4, during the flattening process, the second flattening section 3 rotates around its hinge axis with the first flattening section 2. During this process, the lowest point of the end face of the connecting groove 72 on the first flattening section 2 first contacts the gas ejected from the connecting groove 741. As the second flattening section 3 continues to rotate, the airflow ejected from the connecting groove 741 on the side of the second flattening section 3 closest to the first flattening section 2 approaches the end face of the connecting groove 72 on the first flattening section 2. As the connecting block 71 is arranged obliquely upwards, when the connecting block 71 is fully inserted into the connecting groove 72, the highest position that the gas ejected from the connecting block 71 through the connecting groove 741 can reach is already at the highest position of the end face of the connecting groove 72. This ensures that before the connecting block 71 is fully inserted into the connecting groove 72, the gas ejected from the connecting groove 741 can completely sweep over the end face of the connecting groove 72, thereby ensuring that impurities in the connecting groove 72 and on the end face of the connecting groove 72 can be cleaned as much as possible. Similarly, the third flat section 4 rotates around the axis of its hinge with the second flat section 3, so impurities on the end face of the connecting groove 72 on the third flat section 4 can also be cleaned as much as possible.

[0026] In this embodiment, the connecting block 71 is curved, and the connecting groove 72 is also curved. In this embodiment, the multiple air jet holes 742 are all arranged at an angle toward the end face of the connecting block 71. Therefore, the gas ejected from the air jet holes 742 flows along the curved surface of the connecting block 71 and finally flows toward the end face of the connecting block 71. In this process, the gas ejected from the air jet holes 742 can achieve the effect of scouring the surface of the connecting block 71 and the end face of the connecting block 71.

[0027] It should be further explained that when the connecting block 71 is about to be inserted into the connecting groove 72, the connecting block 71 has not yet abutted against the sealing element 73. Therefore, a gas flow channel will be formed between the outer wall of the connecting block 71 and the groove wall of the connecting groove 72. At this time, the gas ejected from the connecting groove 741 and the jet hole 742 can flow out from the inside of the connecting groove 72 to the outside along the channel. In this process, the groove wall of the connecting groove 72, the end face of the connecting groove 72, the surface of the connecting block 71, and the end face of the connecting block 71 can be further flushed by the airflow in the channel, thereby further achieving the cleaning effect on the contact surfaces of each flat section, thereby further reducing the probability of gaps between the flat sections and ensuring the rigidity of the overall flat section due to negative pressure.

[0028] In addition, in this embodiment, both the connecting block 71 and the connecting groove 72 are set as corresponding arc surfaces, which can also guide and position the connection between the first flat section 2 and the second flat section 3, or the second flat section 3 and the third flat section 4, thereby further reducing the probability of misalignment between the first flat section 2, the second flat section 3 and the third flat section 4.

[0029] In this embodiment, the sealing element 73 is a rubber strip, which is set at the opening of the connecting groove 72. When the connecting block 71 is fully inserted into the connecting groove 72, the rubber strip seals the connecting groove 741 and several air jet holes 742 in the connecting groove 72, so that the negative pressure space reserved in the connecting groove 72 is in a relatively sealed state, thereby facilitating the subsequent air extraction work.

[0030] In this embodiment, a detection component 8 is also provided at the connection between the air pump and the gas channel. In this embodiment, the detection component 8 is set as a pressure sensor. After the air pump extracts the gas from the negative pressure chamber in the connecting groove 72, the air pressure in the negative pressure chamber, the internal space of the connecting block 71, and the gas channel should be at a low threshold. If the value detected by the pressure sensor exceeds this threshold, it indicates that the negative pressure chamber is not in a sealed state. This may be due to damage to the rubber belt, or gaps between the first flat section 2 and the second flat section 3, or between the second flat section 3 and the third flat section 4, which causes the connecting groove 72 to still be connected to the external space. This will result in insufficient internal and external pressure difference, which in turn will reduce the rigidity of the overall flat section. Therefore, the staff needs to check in time whether the rubber belt is damaged, or whether there are still impurities between the first flat section 2 and the second flat section 3, or between the second flat section 3 and the third flat section 4, or whether the contact surface between the first flat section 2 and the second flat section 3, or between the second flat section 3 and the third flat section 4 is damaged.

[0031] The device in this embodiment also includes a trenching component 9. The trenching component 9 is also provided in two sets and is arranged opposite to each other on both sides of the frame 1. The trenching component 9 includes a trenching shovel 91 and a collision avoidance diverter 92 provided at the front end of the trenching shovel 91 in the direction of travel. The trenching shovel 91 is provided on the second leveling section 3. The bending avoidance surface of the collision avoidance diverter 92 extends obliquely to both sides along the direction of travel to intercept hard obstacles on the travel path.

[0032] The anti-collision diversion component 92 in this embodiment includes a first guard plate 921 and a second guard plate 922. The first guard plate 921 is fixedly installed on the first leveling section 2, and the second guard plate 922 is fixedly installed on the second leveling section 3. When the device is in the unfolded state, the first guard plate 921 and the second guard plate 922 are arranged in a V-shape symmetrically inclined direction close to the trenching shovel 91, and a soil guiding and flow-avoiding channel is left between the ends of the first guard plate 921 and the second guard plate 922 to allow some soil to pass through. This design can intercept larger stones or branches and other impurities, so that relatively fluid soft soil can flow from the soil guiding and flow-avoiding channel to the working surface of the trenching shovel 91, thereby achieving the protection of the trenching shovel 91.

[0033] Working principle: During operation, the first folding drive component 5 and the second folding drive component 6 drive the two second flattening sections 3 and the two third flattening sections 4 to flip and flatten downwards in sequence. As the connecting block 71 is inserted into the connecting groove 72, the air pump first fills the hollow connecting block 71 with high-pressure gas. The gas is forcefully ejected outwards from the oblique jet hole 742 and the connecting groove 741, sweeping upwards from bottom to top over the inner wall and end face of the connecting groove 72 and the end face of the connecting block 71, in order to blow away and remove mud and sand impurities. When the flattening section is completely flattened and the connecting block 71 is fully inserted into the connecting groove 72, the rubber band at the groove opening seals the connecting groove 741 and the jet hole 742 inside the connecting groove 72 to form a sealed cavity. The air pump automatically switches to suction mode to remove the gas from the cavity, so that the first leveling section 2, the second leveling section 3, and the third leveling section 4 are strongly pressed and locked under the action of external atmospheric pressure, eliminating the assembly gap of the hinge pin. At the same time, the pressure sensor detects the negative pressure value and feeds back the locked status. Then the whole machine is towed and pushed by the vehicle body. The long arc surface formed by the bottom surfaces of each leveling section flattens the ground surface. The trenching shovel 91 performs trenching operation simultaneously. The first guard plate 921 and the second guard plate 922, which are arranged in a V-shape at the front end of the trenching shovel 91, intercept hard obstacles on the ground to protect the shovel head. After the operation is completed, the air pump depressurizes to release the vacuum. Each folding drive component drives the two second leveling sections 3 and the two third leveling sections 4 to flip and fold upwards to the transport width.

[0034] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A double-layered folding field leveling and ditching device, characterized in that, include: The frame (1) is used to connect the leveling and trenching device to the vehicle body; The first leveling section (2) is fixedly installed on the frame (1); Two second flattened sections (3) are distributed on both sides of the first flattened section (2) and are hinged to the first flattened section (2); Two third leveling sections (4) correspond one-to-one with two second leveling sections (3). The two third leveling sections (4) are also distributed on both sides of the first leveling section (2), and the third leveling section (4) is hinged to the side of the second leveling section (3) away from the first leveling section (2). The first folding drive (5) is used to drive the two second flat sections (3) to fold or flatten around the first flat section (2); The second folding drive (6) is used to drive the third flat section (4) to fold or flatten around the corresponding second flat section (3); The connecting component (7) includes a connecting block (71) disposed on one end face of a flat section and a connecting groove (72) disposed on the end face of an adjacent flat section. The connecting block (71) can be inserted into the connecting groove (72), and a sealing element (73) and a negative pressure suction element (74) are provided between the connecting block (71) and the connecting groove (72) to form a closed negative pressure cavity after the connecting block (71) is inserted into the connecting groove (72), so that the adjacent flat sections are rigidly abutted under the action of external atmospheric pressure.

2. The double-layer folding field leveling and ditching device according to claim 1, characterized in that: The connecting block (71) has a hollow structure. The negative pressure suction device (74) includes an air source (743) and a connecting groove (741) opened at the end of the connecting block (71). The connecting groove (741) connects the internal space of the connecting block (71) with the outside. The connecting block (71) has several air vents (742) on its side wall that communicate with the internal space. The gas source (743) is configured such that: before the connecting block (71) is fully inserted into the connecting groove (72), the gas source (743) fills the connecting block (71) with high-pressure gas, and the gas is ejected outward from the jet hole (742) and the connecting groove (741) to blow away impurities in the connecting groove (72) and on the end face of the connecting groove (72); after the connecting block (71) is fully inserted into the connecting groove (72) and the sealing member (73) is pressed, the gas source (743) switches to the suction state, so that the cavity enclosed by the sealing member (73) forms a negative pressure locking state.

3. The double-layer folding field leveling and ditching device according to claim 2, characterized in that: The side wall of the connecting block (71) is also provided with a number of arrayed jet holes (742), and the jet holes (742) are all connected to the internal space of the connecting block (71). The jet holes (742) are all arranged at an angle close to the contact surface of the second flat section (3). The gas ejected from the jet holes (742) blows the surface of the connecting block (71) and the end face where the connecting block (71) is located.

4. The double-layer folding field leveling and ditching device according to claim 3, characterized in that: The groove wall of the connecting groove (72) is set to an outward arc surface, and the side wall of the connecting block (71) is also set to a corresponding arc surface. When the connecting block (71) is inserted into the connecting groove (72), the side wall of the connecting block (71) and the groove wall of the connecting groove (72) form an airflow channel.

5. A double-layer folding field leveling and ditching device according to claim 4, characterized in that: The sealing element (73) is a rubber strip, which is disposed on the wall of the connecting groove (72). When the connecting block (71) is fully inserted into the connecting groove (72), the rubber strip seals the connecting groove (741) and several air jet holes (742) in the connecting groove (72).

6. A double-layer folding field leveling and ditching device according to claim 5, characterized in that: The frame (1) is also provided with a detection component (8) for detecting the internal space pressure of the connecting block (71). The detection component (8) is located at the output end of the drive source. The detection component (8) includes a pressure sensor. The pressure sensor determines whether the connecting component (7) rigidly connects the first flat section (2), the second flat section (3) and the third flat section (4) based on the measured value.

7. The double-layer folding field leveling and ditching device according to claim 1, characterized in that: It also includes a trenching component (9), which includes a trenching shovel (91) and a collision avoidance diverter (92) disposed at the front end of the trenching shovel (91) in the direction of travel. The trenching shovel (91) is disposed on the second leveling section (3), and the bending avoidance surface of the collision avoidance diverter (92) extends obliquely to both sides along the direction of travel to intercept hard obstacles on the travel path.

8. A double-layer folding field leveling and ditching device according to claim 7, characterized in that: The anti-collision diversion component (92) includes a first guard plate (921) and a second guard plate (922). The first guard plate (921) is fixedly installed on the first leveling section (2), and the second guard plate (922) is fixedly installed on the second leveling section (3). When the device is in the unfolded state, the first guard plate (921) and the second guard plate (922) are arranged in a V-shape symmetrically inclined manner along the direction close to the trenching shovel (91), and a soil guiding and flow avoidance channel is left between the ends of the first guard plate (921) and the second guard plate (922) for some soil to pass through.

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