A deep trenching device for land reclamation

Abstract

This invention relates to the field of land reclamation engineering machinery technology, and more specifically, to a deep trenching device for land reclamation, comprising a frame, a hanger, a power mechanism, and a cutter head mechanism. The hanger is connected to the frame, and the cutter head mechanism includes a central cutter group and two auxiliary cutter groups. The central cutter group is movably connected between the two auxiliary cutter groups, and the two auxiliary cutter groups are movably connected to the bottom of the hanger. The power mechanism drives the central cutter group and the two auxiliary cutter groups to rotate in opposite directions. This invention can be used for deep trenching in land reclamation projects such as saline-alkali land reclamation and compacted soil improvement. By rotating the central cutter group and the two auxiliary cutter groups in opposite directions, a shearing effect is produced on the soil, improving soil cutting and breaking efficiency, reducing cutting resistance, and allowing all three cutter groups to operate simultaneously, thus improving trenching efficiency and solving the problem of insufficient cutting and breaking in the prior art with a single disc moving in the same direction.

Description

Technical Field

[0001] This invention relates to the field of land reclamation engineering machinery technology, and more specifically, to a deep trenching device for land reclamation. Background Technology

[0002] In land management projects, especially in the treatment of saline-alkali land and the improvement of compacted soil, it is often necessary to dig deep trenches for laying underground pipes to drain salt, burying soil conditioners, sand, straw, organic fertilizer, etc., or mixing and tilling deep soil. Disc-type trenching devices are widely used in deep trenching operations. Their core working component is a rotating disc cutterhead, which cuts and breaks up the soil through cutting teeth. Existing disc-type trenching devices mostly use an integral structure for the cutterhead, meaning several teeth are fixed or integrally formed on a single disc. During operation, the entire disc cuts into the soil in one go, resulting in high cutting resistance and insufficient single-disc cutting in the same direction, requiring secondary operations. When operating in areas containing underground obstacles such as rocks and tree roots, the lack of obstacle avoidance structures means the entire cutterhead cannot avoid these obstacles, easily leading to hard damage such as tooth breakage, disc collapse, and shaft breakage, resulting in high maintenance costs and long downtime. Summary of the Invention

[0003] To at least partially solve the above-mentioned problems, this invention provides a deep trenching device for land reclamation, comprising a frame, a hanger, a power mechanism, and a cutterhead mechanism. The hanger is connected to the frame. The cutterhead mechanism includes a central cutter group and two auxiliary cutter groups. The central cutter group is movably connected between the two auxiliary cutter groups, and the two auxiliary cutter groups are movably connected to the bottom of the hanger. The power mechanism drives the central cutter group and the two auxiliary cutter groups to rotate in opposite directions. By configuring the cutterhead mechanism as a structure with a central cutter group and two auxiliary cutter groups, and by having the power mechanism drive the central cutter group and the two auxiliary cutter groups to rotate in opposite directions, this invention subjects the soil between the central cutter group and the auxiliary cutter groups to cutting forces in opposite directions, producing a shearing effect. This improves soil cutting and breaking efficiency, reduces cutting resistance, and allows all three cutter groups to operate simultaneously, increasing trenching efficiency. The suspended installation of the hanger allows the cutterhead mechanism to effectively extend into the ground surface for deep trenching operations, meeting the needs of deep trench excavation.

[0004] Furthermore, the hanger includes a sliding plate, a support frame, a lifting cylinder, and a guide assembly; the sliding plate is mounted on the frame, and two vertical sliding grooves are opened on both sides of the sliding plate, with two support frames slidingly engaged in the two vertical sliding grooves; two auxiliary blade sets are rotatably connected to the lower ends of the two support frames; two lifting cylinders are fixed to both sides of the frame, and the movable end of each lifting cylinder is connected to a support frame through a guide assembly to drive the support frame to slide up and down in the vertical sliding groove.

[0005] Furthermore, the guide assembly includes a lateral U-shaped frame, a linkage rod, and a guide wheel; the lateral U-shaped frame is fixed to the movable end of the lifting cylinder; one end of the linkage rod is fixed to the side of the support frame, and the other end is rotatably connected to the guide wheel; the guide wheel rolls within the U-shaped groove of the lateral U-shaped frame.

[0006] Furthermore, the sliding plate is slidably fitted in the horizontal groove of the frame, and a guide rod is fixed in the horizontal groove. The sliding plate is slidably fitted on the guide rod through the guide hole. An elastic element is sleeved on the guide rod. One end of the elastic element is fixed to the inner side of the horizontal groove of the frame, and the other end is fixed to the sliding plate.

[0007] Furthermore, the lateral U-shaped frame consists of an upper plate, a lower plate, and a side arc plate; the upper plate is shorter than the lower plate. When the cutting mechanism is obstructed and the sliding plate slides backward to the preset position, the guide wheel passes over the end of the upper plate of the lateral U-shaped frame and is released from the constraint of the upper plate.

[0008] Furthermore, a clearance guide block is fixed at the rear end of the frame, and a guide ramp is provided on the clearance guide block. The horizontal height of the guide ramp gradually increases from the traveling end of the frame to the rear end of the frame. After the guide wheel passes the end of the upper plate of the lateral U-shaped frame, the guide wheel contacts the guide ramp of the clearance guide block. When the guide wheel slides upward along the guide ramp, the cutter head mechanism avoids the cutting resistance source upward through the cooperation of the linkage rod and the support frame.

[0009] Furthermore, the lower plate of the lateral U-shaped frame extends to the side of the avoidance guide block, and the horizontal height of the lower plate is not lower than the horizontal height of the bottom of the guide ramp of the avoidance guide block.

[0010] Furthermore, the central cutter assembly includes a central rotating shaft, a central cutter disc, and two first bevel gears; the central rotating shaft is connected between the two auxiliary cutter assemblies, the central cutter disc is fixed to the central rotating shaft, and the two first bevel gears are fixed relative to each other on both sides of the central rotating shaft. Both first bevel gears are connected to a power mechanism so that they rotate in the same direction under the drive of the power mechanism.

[0011] Furthermore, the auxiliary cutter assembly includes a rotating tube, an auxiliary cutter disc, and a second bevel gear; the rotating tube is rotatably connected to the bottom of the support frame, and the central rotating shaft is rotatably connected inside the rotating tube; the auxiliary cutter disc and the second bevel gear are fixed on the rotating tube, the auxiliary cutter disc is rolled in engagement with the side of the central cutter disc, and the second bevel gear meshes with the power mechanism to rotate under the drive of the power mechanism.

[0012] Furthermore, the diameter of the auxiliary cutter head is smaller than that of the central cutter head, so that the cutting depth of the central cutter head is greater than that of the auxiliary cutter head.

[0013] The auxiliary cutter head has a concentric ring on its outer ring surface, which rotates and fits in a concentric groove on the outer side of the central cutter head.

[0014] Multiple weight-reducing slots are evenly arranged around the central cutter head, and all of the weight-reducing slots are located inside the concentric slots.

[0015] Multiple side cutting teeth are evenly arranged around the outer ring surface of the auxiliary cutter head, and the side cutting teeth are inclined toward the main cutting teeth on the central cutter head.

[0016] The power mechanism includes a drive shaft, a linkage sleeve, a driving bevel gear, a transmission vertical shaft, a driven bevel gear, a transmission sleeve, and a transmission bevel gear. The drive shaft is rotatably connected to the frame via a support. One end of the drive shaft is connected to the power output end, and the other end is configured as a multi-faceted prism structure and slides within the multi-faceted groove of the linkage sleeve. The linkage sleeve is rotatably connected to a sliding plate via a support, and a driving bevel gear is fixed to the linkage sleeve. The driving bevel gear meshes with a driven bevel gear fixed to the upper part of the transmission sleeve. The transmission sleeve is rotatably connected to the sliding plate. Both ends of the transmission vertical shaft are rotatably connected to a support frame. The protruding edges on the outer circumference of the transmission vertical shaft slide within the longitudinal groove of the transmission sleeve. A transmission bevel gear is fixed to the bottom of the transmission vertical shaft. The inner and outer sides of the transmission bevel gear mesh with a second bevel gear and a first bevel gear, respectively, to drive the first bevel gear and the second bevel gear to rotate in opposite directions.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: This invention discloses a deep trenching device for land reclamation. Through the counter-rotation of a central cutter group and two auxiliary cutter groups, a shearing effect is generated on the soil, improving soil cutting and breaking efficiency and reducing cutting resistance. Furthermore, the simultaneous operation of all three cutter groups enhances trenching efficiency. Secondly, the coordinated use of a hanger and guide components enables automatic obstacle avoidance and automatic resetting after obstacle removal, effectively protecting the cutter head mechanism and power mechanism from hard damage. Additionally, the single power source of the power mechanism, combined with the sliding connections of the multi-faceted prism and multi-faceted groove, and the convex ridge and longitudinal groove, ensures uninterrupted power transmission throughout the entire working condition, including horizontal obstacle avoidance and longitudinal lifting, ensuring reliable device operation. Finally, a lifting cylinder enables the overall lifting of the cutter head mechanism, thereby adjusting the trenching depth to adapt to different land reclamation needs.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall schematic diagram provided for an embodiment of the present invention; Figure 2 An overall sectional view provided for an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of the hanger provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the guide assembly provided in an embodiment of the present invention; Figure 5 Cross-sectional view of the cutter head mechanism provided in the embodiment of the present invention. Figure 1 ; Figure 6 Cross-sectional view of the cutter head mechanism provided in the embodiment of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the structure of the central tool disc provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the auxiliary cutter head provided in an embodiment of the present invention; Figure 9 A schematic diagram of the power mechanism provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the power mechanism and the cutter head mechanism provided in an embodiment of the present invention.

[0020] Icons: Frame 100; Guide rod 110; Elastic element 120; Avoidance guide block 130; Hanger 200; Sliding plate 210; Support frame 220; Lifting cylinder 230; Guide assembly 240; Lateral U-shaped frame 241; Linkage rod 242; Guide wheel 243; Power mechanism 300; Drive shaft 310; Driving bevel gear 320; Transmission vertical shaft 330; Driven bevel gear 340; Transmission sleeve 350; Transmission bevel gear 360; Linkage sleeve 370; Cutter head mechanism 400; Central cutter group 410; Central rotating shaft 411; Central cutter head 412; First bevel gear 413; Auxiliary cutter group 420; Rotating tube 421; Auxiliary cutter head 422; Second bevel gear 423. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0023] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0024] The following is in conjunction with the appendix Figure 1-10 The present invention will be described in further detail below.

[0025] Example 1: like Figures 1-2 As shown, the deep trenching device for land reclamation includes a frame 100, a hanger 200, a power mechanism 300, and a cutterhead mechanism 400. The frame 100 is the basic support component of the entire device, providing the installation foundation for each component. The hanger 200 is connected to the frame 100 and is used to install the power mechanism 300 and the cutterhead mechanism 400. Through the suspended installation of the hanger 200, the cutterhead mechanism 400 can be arranged below the frame 100, which facilitates the cutterhead mechanism 400 to extend into the ground surface for trenching operations.

[0026] The cutter head mechanism 400 is the core component for performing trenching operations, including a central cutter group 410 and two auxiliary cutter groups 420. The two auxiliary cutter groups 420 are movably connected to the bottom of the hanger 200 and are respectively located on both sides of the bottom of the hanger 200. The two auxiliary cutter groups 420 can rotate relative to the hanger 200. The central cutter group 410 is movably connected between the two auxiliary cutter groups 420. The central cutter group 410 and the two auxiliary cutter groups 420 are coaxially arranged, so that the central cutter group 410 and the two auxiliary cutter groups 420 can rotate independently around the same axis.

[0027] The power mechanism 300 is connected to the power output end of the external traction equipment and drives the central cutter group 410 and two auxiliary cutter groups 420 to provide rotational power to each cutter group. The power mechanism 300 transmits power to the central cutter group 410 and the two auxiliary cutter groups 420 respectively, and makes the central cutter group 410 and the two auxiliary cutter groups 420 rotate in opposite directions, while the two auxiliary cutter groups 420 rotate in the same direction.

[0028] The trenching device in this embodiment operates through the following processes: During trenching operations, the device is connected to an external traction device via the frame 100 and moves along the ground under the action of external traction force. The power mechanism 300 is connected to the power output end of the external traction device, driving the central cutter group 410 and the two auxiliary cutter groups 420 to rotate in opposite directions. In the boundary area between the central cutter group 410 and the two auxiliary cutter groups 420, the central cutter group 410 and the two auxiliary cutter groups 420 apply cutting forces in opposite directions to the soil, forming a shearing effect, making the soil in this area easier to break and cut, which helps to reduce cutting resistance and improve soil cutting efficiency.

[0029] Regarding the cutting depth, the central cutter group 410 is located in the middle of the two auxiliary cutter groups 420. During the operation, it mainly undertakes the function of cutting deeper to form the main depth of the trench. The two auxiliary cutter groups 420 are arranged on both sides of the central cutter group 410, mainly undertaking the function of widening the trench. The central cutter group 410 and the two auxiliary cutter groups 420 work together to form a deep trench with a large depth and appropriate width in one operation, which meets the needs of deep trench excavation in land management.

[0030] This embodiment achieves reverse shear cutting through the above structure, which is beneficial to improve soil cutting and crushing efficiency, reduce cutting resistance, and allows the three cutter groups to work simultaneously, improving trenching efficiency. The suspended installation method of the hanger 200 allows the cutter head mechanism 400 to effectively extend into the ground surface for deep trenching operations, meeting the needs of deep trench excavation.

[0031] Example 2: This embodiment, based on Embodiment 1, provides a detailed description of the specific structure of the hanger 200. For example... Figures 1-3 As shown, the hanger 200 includes a sliding plate 210, a support frame 220, a lifting cylinder 230, and a guide assembly 240. The sliding plate 210 is mounted on the frame 100 and serves as the basic mounting component of the hanger 200. Two vertical sliding grooves are formed on opposite sides of the sliding plate 210, and the two support frames 220 slide in the two vertical sliding grooves. The groove walls of the vertical sliding grooves constrain the support frames 220, limiting the horizontal displacement of the support frames 220, so that the support frames 220 can only move in the vertical direction and will not deviate or sway in the horizontal direction.

[0032] Two auxiliary tool sets 420 are rotatably connected to the lower ends of two support frames 220 and are arranged symmetrically from left to right. The rotatable connection allows the auxiliary tool sets 420 to rotate around their own axis at the lower end of the support frame 220 to perform cutting operations.

[0033] Two lifting cylinders 230 are fixed to each other on both sides of the frame 100, arranged symmetrically. The fixed end of each lifting cylinder 230 is fixed to the frame 100, and the movable end is connected to a support frame 220 through a guide component 240. When the lifting cylinder 230 moves in extension or retraction, the guide component 240 drives the corresponding support frame 220 to slide up and down in the vertical sliding groove. When the trenching depth needs to be adjusted, when the movable end of the lifting cylinder 230 extends, the guide component 240 pushes the support frame 220 to slide upward along the vertical sliding groove, and the cutter head mechanism 400 rises as a whole, reducing the trenching depth. When the movable end of the lifting cylinder 230 retracts, the guide component 240 pulls the support frame 220 to slide downward along the vertical sliding groove, and the cutter head mechanism 400 descends as a whole, increasing the trenching depth. The depth of the cutter cutting into the soil can be flexibly adjusted to meet different land treatment needs.

[0034] Example 3: This embodiment, based on Embodiment 2, provides a detailed description of the specific structure of the guide component 240. For example... Figures 1-4 As shown, the guide assembly 240 includes a lateral U-shaped frame 241, a linkage rod 242, and a guide wheel 243. The lateral U-shaped frame 241 is fixed to the movable end of the lifting cylinder 230. One end of the linkage rod 242 is fixed to the side of the support frame 220, and the other end is rotatably connected to the guide wheel 243. The guide wheel 243 rolls within the U-shaped groove of the lateral U-shaped frame 241. The guide wheel 243 can roll along the horizontal direction of the U-shaped groove, and the side plate of the U-shaped groove constrains the guide wheel 243 in the vertical direction.

[0035] When the lifting cylinder 230 extends or retracts, it drives the lateral U-shaped frame 241 to rise and fall synchronously in the vertical direction. The lateral U-shaped frame 241 transmits the motion to the linkage rod 242 through the guide wheel 243. The linkage rod 242 then drives the support frame 220 to slide up and down in the vertical sliding groove. At the same time, the rotational cooperation between the linkage rod 242 and the guide wheel 243 reduces jamming during movement.

[0036] Example 4: This embodiment, based on embodiment 3, further defines the cooperation method between the sliding plate 210 and the frame 100. For example... Figures 1-4 As shown, the sliding plate 210 is slidably fitted within the horizontal groove of the frame 100, and a guide rod 110 is fixed within the horizontal groove. The sliding plate 210 is slidably fitted onto the guide rod 110 through a guide hole. An elastic element 120 is sleeved on the guide rod 110. One end of the elastic element 120 is fixed to the inner side of the horizontal groove of the frame 100, and the other end is fixed to the sliding plate 210. When the sliding plate 210 slides horizontally, the elastic element 120 undergoes elastic deformation and generates an elastic restoring force. The elastic element 120 can be a compression spring, or other elastic elements capable of achieving elastic buffering function can be selected according to actual needs.

[0037] When cutting soil during trenching operations, hard objects such as rocks and tree roots may be encountered, causing sudden horizontal impact forces on the cutter head mechanism 400. Since the cutter head mechanism 400 is mounted on the sliding plate 210 via the hanger 200, the horizontal impact force is transmitted to the sliding plate 210, causing it to slide horizontally within the horizontal groove of the frame 100. This displacement of the cutter head mechanism 400 is achieved through the hanger 200, preventing damage to the device structure from rigid transmission and improving the reliability of the device. As the sliding plate 210 slides, it moves axially along the guide rod 110 through the guide hole. The guide rod 110 guides and limits the horizontal sliding of the sliding plate 210, preventing it from deflecting or jamming. Simultaneously, the elastic element 120 undergoes elastic deformation as the sliding plate 210 moves, providing a buffering effect. When the horizontal impact force is eliminated, the elastic element 120 generates an elastic restoring force, pushing the sliding plate 210 back to its initial position along the guide rod 110, achieving automatic reset.

[0038] Example 5: This embodiment, based on embodiment 4, provides a detailed description of the specific structure of the lateral U-shaped frame 241. For example... Figures 1-4 As shown, the lateral U-shaped frame 241 consists of an upper plate, a lower plate, and a side arc-shaped plate. The upper and lower plates are arranged parallel to each other in the horizontal direction, and the side arc-shaped plate connects one end of the upper and lower plates, forming a U-shaped groove together. The guide wheel 243 rolls within the U-shaped groove. Under normal operating conditions, the upper plate provides an upper constraint on the guide wheel 243, restricting its upward movement and keeping it within the U-shaped groove. The lower plate provides a lower support for the guide wheel 243, supporting it. The side arc-shaped plate forms the closed end of the U-shaped groove. At this time, the lifting cylinder 230 transmits driving force to the support frame 220 through the lateral U-shaped frame 241, the guide wheel 243, and the linkage rod 242, controlling the working depth of the cutter head mechanism 400. The cutter head mechanism 400 then cuts the soil normally at the set depth.

[0039] Because the upper plate is shorter than the lower plate, there is a section at the end of the U-shaped groove away from the side arc plate. The lower plate still exists in this section and provides downward support for the guide wheel 243, but the upper plate has ended and no longer forms an upward constraint on the guide wheel 243, so that the guide wheel 243 can break free from the upward constraint of the upper plate when it moves to this section along the extension direction of the U-shaped groove.

[0040] A clearance guide block 130 is fixed at the rear end of the frame 100. The clearance guide block 130 is provided with a guide ramp. The horizontal height of the guide ramp gradually increases from the traveling end of the frame 100 to the rear end of the frame 100. That is, the guide ramp is lower at the end near the traveling end of the frame 100 and higher at the end near the rear end of the frame 100. The overall structure is a ramp that gradually increases from front to back.

[0041] The lower plate of the lateral U-shaped frame 241 extends to the side of the avoidance guide block 130, so that the guide wheel 243 can smoothly transition from the lower plate to the guide slope of the avoidance guide block 130; and the horizontal height of the lower plate is not lower than the horizontal height of the bottom of the guide slope of the avoidance guide block 130; that is, the height of the plane where the lower plate is located is greater than or equal to the height of the lowest point of the guide slope, ensuring that the guide wheel 243 will not encounter an upward step when transitioning from the lower plate to the guide slope, thus ensuring the smoothness of the transition.

[0042] When the cutter head mechanism 400 encounters a sudden increase in cutting resistance during operation, the cutting resistance is transmitted through the cutter head mechanism 400 to the support frame 220, and then through the linkage rod 242 to the guide wheel 243. At the same time, it is transmitted through the support frame 220 to the sliding plate 210, causing the sliding plate 210 to move backward in the horizontal groove of the frame 100. The linkage rod 242, which is fixed to the side of the support frame 220, moves backward accordingly, driving the guide wheel 243 to roll backward in the U-shaped groove. When the sliding plate 210 slides backward to the preset position, the guide wheel 243 moves to the end of the upper plate of the lateral U-shaped frame 241. At this time, the guide wheel 243 passes the end of the upper plate of the lateral U-shaped frame 241 and enters the area supported only by the lower plate and without the constraint of the upper plate. The guide wheel 243 is no longer restricted to moving upward by the upper plate. Since the cutting resistance still exists, the sliding plate 210 continues to slide backward, the guide wheel 243 continues to roll backward, and smoothly transitions from the lower plate to the guide slope of the avoidance guide block 130, and slides upward along the guide slope. Thus, the linkage rod 242 drives the support frame 220 to slide upward in the vertical sliding groove, and the cutter head mechanism 400 is lifted accordingly, so that the cutter head mechanism 400 is separated from or avoids the obstacle, avoiding a hard collision between the cutter head mechanism 400 and the obstacle, realizing overload protection for the cutter head mechanism 400, and enabling the device to adapt to different working conditions and soil conditions.

[0043] Example 6: This embodiment, based on embodiment 5, provides a detailed description of the specific structure of the central blade assembly 410 and the auxiliary blade assembly 420, as well as their cooperative connection relationship. For example... Figures 5-8 As shown, the central cutter assembly 410 includes a central rotating shaft 411, a central cutter disc 412, and two first bevel gears 413. The central rotating shaft 411 is connected between two auxiliary cutter assemblies 420. The central cutter disc 412 is fixed to the central rotating shaft 411. The two first bevel gears 413 are fixed relative to each other on both sides of the central rotating shaft 411. Both first bevel gears 413 are connected to the power mechanism 300 so that they rotate in the same direction under the drive of the power mechanism 300.

[0044] The power mechanism 300 transmits power from the external traction equipment to the first bevel gear 413, simultaneously driving two first bevel gears 413 to rotate in the same direction. The two first bevel gears 413 drive the central rotating shaft 411 to rotate around its own axis. As the central rotating shaft 411 rotates, the central cutter head 412 fixed on it rotates accordingly to cut the soil. The central rotating shaft 411 is connected between two auxiliary cutter groups 420, which provide support and positioning for the central rotating shaft 411 from both ends, ensuring the stability of the central rotating shaft 411's rotation.

[0045] The auxiliary cutter assembly 420 includes a rotating tube 421, an auxiliary cutter disc 422, and a second bevel gear 423. The rotating tube 421 is rotatably connected to the bottom of the support frame 220, and the central rotating shaft 411 is rotatably connected inside the rotating tube 421. The auxiliary cutter disc 422 and the second bevel gear 423 are fixed on the rotating tube 421. The auxiliary cutter disc 422 is rolled in engagement with the side of the central cutter disc 412. The second bevel gear 423 meshes with the power mechanism 300 to rotate under the drive of the power mechanism 300.

[0046] The power mechanism 300 transmits the power of the external traction equipment to the second bevel gear 423, driving the second bevel gear 423 to rotate. The second bevel gear 423 drives the rotating tube 421 to rotate. When the rotating tube 421 rotates, the auxiliary cutter head 422 fixed on it rotates accordingly to cut the soil. The support frame 220 provides radial support and axial positioning for the rotating tube 421, ensuring the stability of the rotating tube 421 during rotation.

[0047] The central rotating shaft 411 and the rotating tube 421 are coaxially fitted together, enabling them to achieve independent rotational motion under the drive of the same power mechanism 300, thereby realizing the opposite rotation of the central cutter group 410 and the auxiliary cutter group 420. When the central cutter head 412 and the auxiliary cutter head 422 rotate with the central rotating shaft 411 and the rotating tube 421 respectively, they form a rolling fit at their side contact surfaces. This rolling fit also provides lateral positioning and support between the central cutter head 412 and the auxiliary cutter head 422. The auxiliary cutter head 422 and the central cutter head 412 are mutually constrained on the sides, preventing the central cutter head 412 from shifting laterally under cutting force and maintaining relative position stability. In addition, during the rolling fit between the auxiliary cutter head 422 and the central cutter head 412, the soil between the auxiliary cutter head 422 and the central cutter head 412 is subjected to the squeezing and shearing action of the relatively rotating sides of the cutter heads, which helps to further break up the soil.

[0048] The diameter of the auxiliary cutter head 422 is smaller than that of the central cutter head 412, so that the cutting depth of the central cutter head 412 is greater than that of the auxiliary cutter head 422. The diameter of the auxiliary cutter head 422 is 85%-95% of the diameter of the central cutter head 412, thus forming a differentiated cutting division of labor.

[0049] A concentric ring is provided on the outer ring surface of the auxiliary cutter head 422, and the concentric ring is rotatably fitted in the concentric groove on the outer side of the central cutter head 412. During the counter-rotation of the auxiliary cutter head 422 and the central cutter head 412, the concentric ring rotates accordingly in the concentric groove, forming a rotational fit. The concentric ring is embedded in the concentric groove, which constrains the radial relative position between the auxiliary cutter head 422 and the central cutter head 412, preventing radial separation or displacement of the two under cutting force, and ensuring stable contact of the rolling mating surfaces. The concentric groove provides a guide trajectory for the rotation of the concentric ring, keeping the rolling contact path of the auxiliary cutter head 422 relative to the central cutter head 412 stable, avoiding displacement of the rolling mating surfaces that could lead to poor contact or increased local wear. It also provides a certain constraint on the axial relative position between the auxiliary cutter head 422 and the central cutter head 412, preventing excessive axial displacement of the two.

[0050] Multiple weight-reducing slots are evenly arranged around the central cutter head 412, and all of these slots are located inside the concentric slots. The weight-reducing slots are through-slot structures that penetrate the surface of the central cutter head 412, thereby reducing the weight of the central cutter head 412 and its rotational inertia. This reduces the load on the central rotating shaft 411 and the first bevel gear 413, and extends the service life of the transmission components. In addition, the concentric rings and concentric slots work together to reduce the probability of dust entering the gap between the auxiliary cutter head 422 and the central cutter head 412 and entering the weight-reducing slots, thus reducing the problem of jamming between the auxiliary cutter head 422 and the central cutter head 412.

[0051] Multiple side cutting teeth are evenly arranged around the outer ring surface of the auxiliary cutter disc 422. The side cutting teeth are inclined towards the main cutting teeth on the central cutter disc 412, but do not contact each other. During the counter-rotation of the auxiliary cutter disc 422 and the central cutter disc 412, the side cutting teeth and the main cutting teeth rotate with the auxiliary cutter disc 422 and the central cutter disc 412, respectively. Since the side cutting teeth are inclined towards the main cutting teeth, when the side cutting teeth and the main cutting teeth meet during rotation, a convergent angle area similar to scissors is formed between them. The soil entering this area is simultaneously subjected to the cutting action of the side cutting teeth and the main cutting teeth, and is sheared and crushed during the convergent rotation of the two. The side cutting teeth are evenly arranged around the outer ring surface of the auxiliary cutter disc 422. Every time the auxiliary cutter disc 422 rotates, the side cutting teeth and the main cutting teeth form multiple shearing actions, thereby crushing the soil between the two cutter discs multiple times, improving the soil crushing effect and the fineness of the soil after trenching.

[0052] Example 7: This embodiment, based on Embodiment 6, provides a detailed description of the specific structure of the power mechanism 300. For example... Figures 9-10As shown, the power mechanism 300 includes a drive shaft 310, a linkage sleeve 370, a driving bevel gear 320, a transmission vertical shaft 330, a driven bevel gear 340, a transmission sleeve 350, and a transmission bevel gear 360. The drive shaft 310 is rotatably connected to the frame 100 via a support. One end of the drive shaft 310 is connected to the power output end, and the other end is configured as a multi-prism structure and slides in the multi-faceted groove of the linkage sleeve 370. The linkage sleeve 370 is rotatably connected to the sliding plate 210 via a support. When the drive shaft 310 rotates under the drive of the external traction equipment, it drives the linkage sleeve 370 to rotate. In addition, the polygonal prism can slide axially in the polygonal groove, so that the drive shaft 310 and the linkage sleeve 370 generate relative axial displacement. The drive shaft 310 is mounted on the frame 100 by a support, and the linkage sleeve 370 is mounted on the sliding plate 210 by a support. When the sliding plate 210 moves horizontally, the linkage sleeve 370 moves accordingly, while the position of the drive shaft 310 remains unchanged. At this time, the polygonal prism slides relative to each other in the polygonal groove to adapt to the change in the axial distance between the drive shaft 310 and the linkage sleeve 370, so that the power transmission is not interrupted due to the horizontal movement of the sliding plate 210.

[0053] The linkage sleeve 370 is fixed with a driving bevel gear 320, which rotates together with the linkage sleeve 370 and meshes with a driven bevel gear 340 fixed on the upper part of the transmission sleeve 350. The axis of the driving bevel gear 320 and the axis of the driven bevel gear 340 intersect each other. The meshing realizes the reversal of the force transmission direction, converting the horizontal rotational motion of the linkage sleeve 370 into the vertical rotational motion of the transmission sleeve 350.

[0054] The transmission sleeve 350 is rotatably connected to the sliding plate 210, which provides rotational support for the transmission sleeve 350. Both ends of the transmission vertical shaft 330 are rotatably connected to the support frame 220, which also provides rotational support for the transmission vertical shaft 330. The protruding ribs on the outer circumference of the transmission vertical shaft 330 slide within the longitudinal groove of the transmission sleeve 350, allowing the protruding ribs to slide vertically within the longitudinal groove when the transmission sleeve 350 drives the transmission vertical shaft 330 to rotate, thus enabling a phase transition between the transmission sleeve 350 and the transmission vertical shaft 330. For vertical displacement; the horizontal height of the sliding plate 210 is fixed, while the transmission vertical shaft 330 is installed on the support frame 220. The support frame 220 can slide up and down along the vertical sliding groove of the sliding plate 210. When the support frame 220 moves vertically, the transmission vertical shaft 330 moves vertically with the support frame 220, while the position of the transmission sleeve 350 remains unchanged. At this time, the protrusion slides vertically relative to the longitudinal groove, adapting to the change in the vertical distance between the transmission sleeve 350 and the transmission vertical shaft 330, so that the power transmission is not interrupted due to the vertical movement of the support frame 220.

[0055] A transmission bevel gear 360 is fixed at the bottom of the transmission vertical shaft 330. The inner and outer sides of the transmission bevel gear 360 mesh with the second bevel gear 423 and the first bevel gear 413 respectively, so as to drive the first bevel gear 413 and the second bevel gear 423 to rotate in opposite directions. Specifically, the first bevel gear 413 is fixed to the central rotating shaft 411, and the second bevel gear 423 is fixed to the rotating tube 421. The axes of both are horizontal, while the axis of the transmission bevel gear 360 is vertical. By meshing with the second bevel gear 423 and the first bevel gear 413 respectively, the direction of power transmission is reversed again, and the vertical rotational motion of the transmission vertical shaft 330 is converted into the horizontal rotational motion of the first bevel gear 413 and the second bevel gear 423. Since the first bevel gear 413 and the second bevel gear 423 are respectively placed on the tooth surfaces of the transmission bevel gear 360, when the transmission bevel gear 360 rotates, the forces applied to the first bevel gear 413 and the second bevel gear 423 by the inner and outer tooth surfaces are in opposite directions, thereby driving the first bevel gear 413 and the second bevel gear 423 to rotate in opposite directions; the rotation of the first bevel gear 413 drives the central rotating shaft 411 and the central cutter head 412 to rotate, and the rotation of the second bevel gear 423 drives the rotating tube 421 and the auxiliary cutter head 422 to rotate, thereby realizing the opposite rotation of the central cutter head 412 and the auxiliary cutter head 422; the power of the external traction equipment is transmitted to the central cutter head 412 and the auxiliary cutter head 422 through a transmission system, without the need to provide an independent power source for each cutter head.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A deep trenching device for land reclamation, characterized in that, It includes a frame (100), a hanger (200), a power mechanism (300), and a cutter head mechanism (400); the hanger (200) is connected to the frame (100), and the cutter head mechanism (400) includes a central cutter group (410) and two auxiliary cutter groups (420). The central cutter group (410) is movably connected between the two auxiliary cutter groups (420), and the two auxiliary cutter groups (420) are movably connected to the bottom of the hanger (200). The power mechanism (300) drives the central cutter group (410) and the two auxiliary cutter groups (420) to rotate in opposite directions.

2. The deep trenching device for land reclamation according to claim 1, characterized in that, The hanger (200) includes a sliding plate (210), a support frame (220), a lifting cylinder (230), and a guide assembly (240). The sliding plate (210) is mounted on the frame (100). Two vertical sliding grooves are provided on both sides of the sliding plate (210). Two support frames (220) are slidably fitted in the two vertical sliding grooves. Two auxiliary blade sets (420) are rotatably connected to the lower ends of the two support frames (220). Two lifting cylinders (230) are fixed to both sides of the frame (100). The movable end of each lifting cylinder (230) is connected to a support frame (220) through a guide assembly (240) to drive the support frame (220) to slide up and down in the vertical sliding groove.

3. The deep trenching device for land reclamation according to claim 2, characterized in that, The guide assembly (240) includes a lateral U-shaped frame (241), a linkage rod (242), and a guide wheel (243); the lateral U-shaped frame (241) is fixed to the movable end of the lifting cylinder (230); one end of the linkage rod (242) is fixed to the side of the support frame (220), and the other end is rotatably connected to the guide wheel (243); the guide wheel (243) rolls into the U-shaped groove of the lateral U-shaped frame (241).

4. The deep trenching device for land reclamation according to claim 3, characterized in that, The sliding plate (210) is slidably fitted in the horizontal groove of the frame (100), and a guide rod (110) is fixed in the horizontal groove. The sliding plate (210) is slidably fitted on the guide rod (110) through the guide hole. An elastic element (120) is sleeved on the guide rod (110). One end of the elastic element (120) is fixed to the inner side of the horizontal groove of the frame (100), and the other end is fixed to the sliding plate (210).

5. A deep trenching device for land reclamation according to claim 4, characterized in that, The lateral U-shaped frame (241) consists of an upper plate, a lower plate and a side arc plate; the upper plate is shorter than the lower plate. When the cutting of the cutter head mechanism (400) is obstructed, the sliding plate (210) slides backward to the preset position, and the guide wheel (243) passes over the end of the upper plate of the lateral U-shaped frame (241) and is freed from the constraint of the upper plate.

6. A deep trenching device for land reclamation according to claim 5, characterized in that, A clearance guide block (130) is fixed at the rear end of the frame (100). The clearance guide block (130) is provided with a guide slope. The horizontal height of the guide slope gradually increases from the traveling end of the frame (100) to the rear end of the frame (100). After the guide wheel (243) passes the end of the upper plate of the lateral U-shaped frame (241), the guide wheel (243) contacts the guide slope of the clearance guide block (130). When the guide wheel (243) slides upward along the guide slope, the cutter head mechanism (400) avoids the cutting resistance source upward through the cooperation of the linkage rod (242) and the support frame (220).

7. A deep trenching device for land reclamation according to claim 6, characterized in that, The lower plate of the lateral U-shaped frame (241) extends to the side of the avoidance guide block (130), and the horizontal height of the lower plate is not lower than the horizontal height of the bottom of the guide ramp of the avoidance guide block (130).

8. A deep trenching device for land reclamation according to claim 7, characterized in that, The central cutter assembly (410) includes a central rotating shaft (411), a central cutter disc (412), and two first bevel gears (413). The central rotating shaft (411) is connected between two auxiliary cutter assemblies (420). The central cutter disc (412) is fixed to the central rotating shaft (411). The two first bevel gears (413) are fixed relative to each other on both sides of the central rotating shaft (411). Both first bevel gears (413) are connected to the power mechanism (300) so that they rotate in the same direction under the drive of the power mechanism (300).

9. A deep trenching device for land reclamation according to claim 8, characterized in that, The auxiliary cutter assembly (420) includes a rotating tube (421), an auxiliary cutter disc (422), and a second bevel gear (423). The rotating tube (421) is rotatably connected to the bottom of the support frame (220), and the central rotating shaft (411) is rotatably connected inside the rotating tube (421). The auxiliary cutter disc (422) and the second bevel gear (423) are fixed on the rotating tube (421). The auxiliary cutter disc (422) is rolled and engaged on the side of the central cutter disc (412). The second bevel gear (423) meshes with the power mechanism (300) to rotate under the drive of the power mechanism (300).

10. A deep trenching device for land reclamation according to claim 9, characterized in that, The diameter of the auxiliary cutter head (422) is smaller than that of the central cutter head (412) so that the cutting depth of the central cutter head (412) is greater than that of the auxiliary cutter head (422).

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