A hydraulic floating front straw cutting device for no-tillage seeding machine

Abstract

The utility model discloses a hydraulic floating type front grass cutting device for no-tillage seeding machine belongs to agricultural machinery technical field, and this device includes main beam frame, grass cutting disc connecting plate, grass cutting disc, grass cutting disc lower connecting rod, grass cutting disc side connecting rod and adjusting oil cylinder, and main beam frame, grass cutting disc lower connecting rod, grass cutting disc side connecting rod and grass cutting disc connecting plate constitute four connecting rod mechanism in common, be used for connecting main beam frame and grass cutting disc, and the cylinder body end of adjusting oil cylinder is rotatably connected in main beam frame, and its piston rod end is rotatably connected on the position between two end rotation points of grass cutting disc lower connecting rod. The utility model provides the initiative and adjustable ground pressure for grass cutting disc through the continuous pressure oil supply to adjusting oil cylinder, solves the problem of the leakage cutting caused by the insufficient pressure, ensures the cutting quality, and simultaneously, utilizes the hydraulic floating function, makes the device when encountering the hard obstacle can automatically lift and pass the barrier and resets quickly, effectively protects the machine.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a hydraulic floating front-mounted grass-cutting device for no-till seeders. Background Technology

[0002] No-till seeding, as an advanced conservation tillage method, has been increasingly widely used in modern agricultural production due to its significant advantages in water conservation, soil fertility improvement, reduction of soil erosion, and lower operating costs. The core characteristic of this technology is that it involves direct seeding on land with little or no stubble removal, resulting in a surface often covered with a large amount of the previous season's crop straw.

[0003] To ensure seeds can be successfully sown into the soil and germinate in a clean seedbed environment, no-till planters typically have a pre-cutting device installed in front of the furrow opener. The main function of this device is to chop surface straw and break up compacted soil layers, clearing a clear path for subsequent sowing. However, in actual operation, especially when there is a large amount of straw cover or the soil is relatively firm, the conventional cutting device, relying solely on the downward pressure generated by its own weight, is often insufficient to ensure the cutting disc effectively cuts through the straw layer and settles stably into the soil. This can cause the device to be lifted by the thick straw layer, resulting in missed cuts or broken cuts, severely affecting the quality of seedbed clearing and the final sowing effect.

[0004] To enhance the cutting ability of the equipment, some designs use additional counterweights or rigid connections to forcibly increase the ground pressure on the cutting disc. While this method improves the cutting effect to some extent, it introduces new and more serious safety hazards. During high-speed operation in the field, undiscovered hard obstacles such as rocks and tree roots are inevitable. For cutting devices with rigid connections or large counterweights, this sudden and violent impact cannot be effectively buffered. The enormous impact force is directly transmitted to the frame and transmission system, easily causing the cutting disc to crack, bearings to be damaged, or even the entire frame to deform. This not only results in costly equipment repairs but also interrupts the operation, significantly reducing the reliability and efficiency of the entire machine. Current technology struggles to simultaneously meet the requirements of ensuring sufficient cutting pressure and providing effective obstacle avoidance protection.

[0005] Therefore, this utility model proposes a hydraulic floating front-mounted grass-cutting device for no-till planters to address the shortcomings of existing technologies. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a hydraulic floating front-mounted grass cutting device for no-till planters, which aims to improve the problems of insufficient soil entry pressure leading to missed cutting and easy damage due to impact with hard obstacles under rigid connection in the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic floating front-mounted grass cutting device for a no-till planter, comprising: a main beam frame, a grass cutting disc connecting plate, a grass cutting disc fixedly connected to the grass cutting disc connecting plate, a grass cutting disc lower connecting rod, a grass cutting disc side connecting rod, a grass cutting disc lower connecting rod connecting shaft fixedly connected to the main beam frame, and a cylinder connecting shaft rotatably connected to the main beam frame, and further comprising an adjusting cylinder. The main beam frame, the grass cutting disc lower connecting rod, the grass cutting disc side connecting rod, and the grass cutting disc connecting plate are connected by a rotatable connection to form a four-bar linkage mechanism, and one end of the grass cutting disc lower connecting rod is rotatably connected to the main beam frame through the grass cutting disc lower connecting rod connecting shaft; The cylinder body end of the adjusting cylinder is rotatably connected to the cylinder connecting shaft, and the piston rod end of the adjusting cylinder is rotatably connected to the lower connecting rod of the grass cutting disc at a position between the two rotatable connection points of the lower connecting rod of the grass cutting disc. Through the coordinated cooperation between the adjusting cylinder and the four-bar linkage, the device's depth adjustment, active pressurization, and floating obstacle crossing functions are realized.

[0008] Preferably, the grass cutting disc connecting plate has a depth adjustment hole for engaging with the limiting bolt.

[0009] Preferably, the hydraulic cylinder connecting shaft is mounted on the main beam frame and located above the lower connecting shaft of the grass cutting disc.

[0010] Preferably, the length of the lower connecting rod of the grass cutting disc is greater than the length of the side connecting rod of the grass cutting disc.

[0011] Preferably, the lower connecting rod of the grass cutting disc and the side connecting rod of the grass cutting disc are spaced apart along the length direction of the main beam frame.

[0012] Preferably, one end of the side connecting rod of the grass cutting disc is rotatably connected to the main beam frame via a pin.

[0013] Preferably, the main beam frame is detachably connected to the front of the seeder via a suspension arm.

[0014] Preferably, the rodless chamber of the regulating cylinder is connected to an oil passage for supplying pressurized oil.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problem of insufficient ground pressure in existing straw-cutting devices, which can lead to lifting and missed cutting when encountering dense straw or firm soil conditions. By setting an adjusting oil cylinder linked to a four-bar linkage mechanism and continuously supplying it with pressurized oil, this invention achieves the effect of actively providing continuous and adjustable downward pressure to the straw-cutting disc, ensuring its stable entry into the soil, thereby significantly improving the straw cleaning effect and operation quality.

[0016] 2. This utility model, by combining the adjusting cylinder with the four-bar linkage mechanism, utilizes the hydraulic system to provide flexible downward pressure, solving the problem that rigidly connected grass cutting devices in the prior art are prone to damage due to violent impact when encountering hard obstacles during operation. It achieves the effect of enabling the grass cutting disc to automatically float and rise to overcome obstacles when encountering huge resistance, and quickly and automatically reset after overcoming obstacles, thereby effectively protecting the device and improving the reliability and continuity of operation. [1] Attached Figure Description

[0017] Figure 1 This is a perspective view of a hydraulic floating front-mounted grass-cutting device for a no-till planter proposed in this utility model; Figure 2 This is a side view of a hydraulic floating front-mounted grass-cutting device for a no-till planter proposed in this utility model.

[0018] Legend: 1. Main beam frame; 2. Hydraulic cylinder connecting shaft; 3. Lower connecting shaft of the cutting disc; 4. Lower connecting rod of the cutting disc; 5. Side connecting rod of the cutting disc; 6. Adjusting cylinder; 7. Cutting disc connecting plate; 8. Cutting disc. [2] Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-2 This utility model provides an embodiment of a hydraulic floating front-mounted grass-cutting device for a no-till planter, comprising a main beam frame 1, a grass-cutting disc connecting plate 7, and a grass-cutting disc 8 fixedly connected to the lower end of the grass-cutting disc connecting plate 7. A grass-cutting disc lower connecting rod connecting shaft 3 is fixedly connected to the main beam frame 1. One end of the grass-cutting disc lower connecting rod 4 is rotatably connected to the main beam frame 1 through the grass-cutting disc lower connecting rod connecting shaft 3, and the other end of the grass-cutting disc lower connecting rod 4 is rotatably connected to the grass-cutting disc connecting plate 7. One end of the grass-cutting disc side connecting rod 5 is rotatably connected to the main beam. The frame 1, the other end of the side connecting rod 5 of the grass cutting disc is rotatably connected to the grass cutting disc connecting plate 7. The main beam frame 1, the lower connecting rod 4 of the grass cutting disc, the side connecting rod 5 of the grass cutting disc and the connecting plate 7 of the grass cutting disc together constitute a four-bar linkage mechanism. The device also includes an adjusting cylinder 6 and a cylinder connecting shaft 2. The cylinder connecting shaft 2 is rotatably connected to the main beam frame 1. The cylinder body end of the adjusting cylinder 6 is rotatably connected to the cylinder connecting shaft 2. The piston rod end of the adjusting cylinder 6 is rotatably connected to the lower connecting rod 4 of the grass cutting disc at a position between the two rotating connection points of the lower connecting rod 4 of the grass cutting disc. Specifically, the main beam frame 1 serves as the load-bearing body and installation platform of the entire device. It is detachably connected to the front of the seeder via a suspension arm to bear the reaction force from the ground and the cutting resistance of the straw during operation. [3] The four-bar linkage is the motion guide structure connecting the main beam frame 1 and the cutting disc 8 assembly. Through the geometric constraints of the four rotating pairs, it ensures that the cutting disc connecting plate 7 and the cutting disc 8 can maintain a stable working angle when they are lifting and lowering under the drive of the adjusting cylinder 6, thereby ensuring the consistency and stability of the cutting effect. The adjusting cylinder 6 is the power execution and control of the entire device. The cylinder body end of the adjusting cylinder 6 is connected to the power control system. The hydraulic cylinder connecting shaft 2 is hinged to the relatively fixed main beam frame 1, forming a stable support point; the piston rod end of the adjusting hydraulic cylinder 6 acts on the lower connecting rod 4 of the grass cutting disc, which is the active rod of the four-bar linkage mechanism. By controlling the extension and retraction of the piston rod of the adjusting hydraulic cylinder 6, the entire four-bar linkage mechanism can be directly driven to move, thereby realizing stepless adjustment of the working depth of the grass cutting disc 8. At the same time, by continuously supplying pressurized oil to the rodless chamber of the adjusting hydraulic cylinder 6 through an oil circuit for supplying pressurized oil, the grass cutting disc 8 assembly can be provided with continuous and adjustable ground pressure to overcome straw resistance and soil hardness, and provide hydraulic buffering and floating obstacle crossing function when encountering huge impacts. The four-bar linkage consists of a main beam frame 1, a lower link 4 for the grass cutting disc, a side link 5 for the grass cutting disc, and a connecting plate 7 for the grass cutting disc. A connecting shaft 3 for the lower link 4 for the grass cutting disc is fixedly connected to the main beam frame 1. One end of the lower link 4 is rotatably connected to the main beam frame 1 through the connecting shaft 3. One end of the side link 5 is rotatably connected to the main beam frame 1 through a pin. The lower link 4 and the side link 5 are spaced apart along the length of the main beam frame 1. The other ends of the lower link 4 and the side link 5 are rotatably connected to the connecting plate 7 for the grass cutting disc, respectively. The length of the lower link 4 is greater than the length of the side link 5, which can accurately control the working posture of the grass cutting disc 8 when the mechanism moves. Meanwhile, the power and control structure of the device, namely the adjusting cylinder 6, is also rotatably connected to the main beam frame 1 by the cylinder connecting shaft 2, and the cylinder connecting shaft 2 is set on the main beam frame 1 and located above the lower connecting shaft 3 of the grass cutting disc. The cylinder body end of the adjusting cylinder 6 is rotatably connected to the cylinder connecting shaft 2, forming a stable hinge point higher than the lower rocker arm fulcrum of the four-bar linkage mechanism; while the piston rod end of the adjusting cylinder 6 is directly rotatably connected to the lower connecting rod 4 of the grass cutting disc at a position between the two rotatable connection points of the lower connecting rod 4 of the grass cutting disc, which can effectively convert the push and pull force generated by the adjusting cylinder 6 into the torque that drives the entire four-bar linkage mechanism to move, thereby controlling the lifting and lowering of the grass cutting disc connecting plate 7 and the grass cutting disc 8. By arranging the cylinder connecting shaft 2 above the lower connecting shaft 3 of the grass cutting disc, a powerful lever arm is formed, which enables the adjusting cylinder 6 to apply downward pressure more efficiently and respond to upward impact;[4] To achieve mechanical hard limiting of the working depth, the cutting disc connecting plate 7 is provided with depth adjustment holes for engaging with the limiting bolts. These depth adjustment holes are multiple through holes arranged along a preset trajectory. By selectively inserting the limiting bolts into different depth adjustment holes and engaging with the main beam frame 1 or its extension structure, the downward stroke of the four-bar linkage can be physically limited. To optimize the lever arm and effect of the adjusting cylinder 6, the cylinder connecting shaft 2 is installed above the lower connecting shaft 3 of the cutting disc on the main beam frame 1, so that the adjusting cylinder 6 can generate a more effective driving torque during extension and retraction. To achieve posture stability of the cutting disc 8 during lifting and lowering, the length of the lower connecting rod 4 of the cutting disc in the four-bar linkage is designed to be greater than the length of the side connecting rod 5 of the cutting disc, and the lower connecting rod 4 of the cutting disc is connected to... The side connecting rods 5 of the grass cutting disc are arranged parallel or nearly parallel along the length of the main beam frame 1. One end of the side connecting rod 5 of the grass cutting disc is rotatably connected to the main beam frame 1 via a pin. Similarly, the connection between the lower connecting rod 4 of the grass cutting disc and the main beam frame 1 and the grass cutting disc connecting plate 7, as well as the connection between the two ends of the adjusting cylinder 6, are all made by pin hinges to ensure the flexibility and reliability of the mechanism's movement. The main beam frame 1 is detachably connected to the front of the seeder via a suspension arm. The interface of the suspension arm is compatible with the front attachment point of the seeder, facilitating the quick attachment and release of the device. The rodless chamber of the adjusting cylinder 6 is connected to an oil circuit for supplying pressurized oil, while the rod chamber of the adjusting cylinder 6 is also connected to a return oil circuit. Both oil circuits are connected to the corresponding control valve group in the hydraulic system of the tractor or seeder via high-pressure oil pipes.

[0021] Working principle: During operation preparation and depth adjustment, the extension and retraction of the adjusting cylinder 6 is controlled by the tractor hydraulic system. The piston rod end of the adjusting cylinder 6 drives the lower connecting rod 4 of the cutting disc, which in turn drives the four-bar linkage consisting of the main beam frame 1, the lower connecting rod 4 of the cutting disc, the side connecting rod 5 of the cutting disc, and the connecting plate 7 of the cutting disc to rotate around the connection point with the main beam frame 1. This allows the cutting disc 8 to be raised or lowered steplessly to set the target cutting depth. At the same time, the depth adjustment hole on the connecting plate 7 of the cutting disc cooperates with the limit bolt to act as a mechanical hard limit to prevent excessive soil penetration. After entering normal grass cutting operation, the system continuously supplies pressurized oil to the rodless chamber of the regulating cylinder 6, providing continuous and adjustable downward pressure to the entire working assembly consisting of the four-bar linkage and the grass cutting disc 8. This active pressurization function enables the grass cutting disc 8 to maintain sufficient soil penetration and cutting effect according to straw density and soil resistance, effectively preventing lifting and missed cutting under heavy straw conditions;[5] When the grass cutting disc 8 encounters a hidden hard obstacle while moving, the upward impact force exerted by the obstacle will be greater than the downward hydraulic pressure provided by the regulating cylinder 6. At this time, the impact force forces the entire four-bar linkage to float upward, driving the grass cutting disc 8 to rise to overcome the obstacle. Once the obstacle is overcome, under the action of the stabilizing hydraulic pressure of the regulating cylinder 6, the entire mechanism will immediately and automatically reset, so that the grass cutting disc 8 returns to the preset cutting depth. This process protects the grass cutting disc 8 and its transmission system from damage and achieves the continuity of operation. [6] [1] III. Beneficial Effects of the Invention 1. Highly efficient anti-clogging: Active hydraulic pressurization ensures that the cutting disc can effectively cut into the seedbed even under heavy straw conditions, thoroughly cleaning the seedbed and fundamentally avoiding clogging of subsequent seeding units.

[0022] 2. Precise depth control: The hydraulic cylinder enables stepless precise adjustment and maintenance of the cutting depth, avoiding power waste and wear caused by missed cuts and excessive soil penetration.

[0023] 3. Automatic contouring and protection: The hydraulic floating four-bar linkage mechanism allows the grass cutting disc to perfectly follow the terrain's contours, while also providing excellent overload protection, protecting the expensive grass cutting disc and transmission system and extending its service life.

[0024] 4. Intelligent control: This device is easy to integrate into the intelligent control system of the seeder, realizing the automation and intelligence of the grass cutting operation.

[0025] [2] Original image:

[0026] [3]1. Main load-bearing and connecting mechanism: Main beam frame (1): The load-bearing body of the device is connected to the front of the main frame of the seeder through a structure such as a suspension arm.

[0027] Hydraulic cylinder connecting shaft (2): a hinge point used to install and adjust the hydraulic cylinder.

[0028] [4]2. Hydraulic floating and adjusting mechanism (core innovation): The four-bar linkage floating mechanism consists of the lower linkage (4) of the grass cutting disc, the side linkage (5) of the grass cutting disc, and the main beam frame (1). This mechanism ensures that the working angle of the grass cutting disc remains unchanged during the lifting and lowering process.

[0029] Adjusting cylinder (6): Its cylinder body end is hinged to the cylinder connecting shaft (2), and its piston rod end is hinged to the lower connecting rod (4) in the four-bar linkage.

[0030] Function 1 (Depth Adjustment): By controlling the extension and retraction of the cylinder (6) through the tractor's hydraulic system, the entire four-bar linkage and the cutting disc can be actively and steplessly raised or lowered, thereby precisely setting and changing the cutting depth.

[0031] Function 2 (Active Pressurization): Supplying pressurized oil to the rodless chamber of the hydraulic cylinder provides a continuous and adjustable downward pressure for the entire cutting disc assembly. The operator can adjust the hydraulic pressure in real time according to the density of the straw and the soil moisture, thereby changing the cutting disc's ability to penetrate the soil and the cutting effect, ensuring that the straw is thoroughly cut even under high load conditions.

[0032] [5]3. Hay-cutting tray assembly: Grass cutting disc connecting plate (7): A base plate for mounting the grass cutting disc (8). The connecting plate is designed with depth adjustment holes and limit bolts to mechanically set the maximum soil penetration depth and prevent excessive wear.

[0033] Grass cutting disc (8): Rotates into the soil during operation to cut straw.

[0034] [6]4. Overload protection mechanism: The entire four-bar linkage itself constitutes a passive overload protection. When the grass cutting disc encounters an insurmountable obstacle (such as a large rock), the upward impact force exerted by the obstacle will overcome the downward hydraulic pressure provided by the cylinder (6), forcing the entire four-bar linkage to drive the grass cutting disc to float upward and over the obstacle.

[0035] After overcoming obstacles, the cutting disc automatically returns to the preset cutting depth under the pressure of the hydraulic cylinder, without the need for driver intervention, thus achieving continuous and uninterrupted operation.

Claims

1. A hydraulically floating front-mounted grass cutter for a no-till planter, comprising: The main beam frame (1) and the grass cutting disc connecting plate (7) are fixedly connected to the lower end of the grass cutting disc connecting plate (7). The main beam frame (1) has a lower connecting rod (4) and a side connecting rod (5) for the grass cutting disc. A connecting shaft (3) for the lower connecting rod of the grass cutting disc is fixedly connected to the main beam frame (1). One end of the lower connecting rod (4) is rotatably connected to the main beam frame (1) through the connecting shaft (3). The other end of the lower connecting rod (4) is rotatably connected to the grass cutting disc connecting plate (7). One end of the side connecting rod (5) is rotatably connected to the main beam frame (1). The other end of the side connecting rod (5) is rotatably connected to the grass cutting disc connecting plate (7). The main beam frame (1), the lower connecting rod (4), the side connecting rod (5), and the connecting plate (7) together constitute a four-bar linkage mechanism. The mechanism is characterized by further comprising: The adjusting cylinder (6) and the cylinder connecting shaft (2) are rotatably connected to the main beam frame (1). The cylinder body end of the adjusting cylinder (6) is rotatably connected to the cylinder connecting shaft (2), and the piston rod end of the adjusting cylinder (6) is rotatably connected to the lower connecting rod (4) of the grass cutting disc at a position between the two rotating connection points of the lower connecting rod (4) of the grass cutting disc.

2. The hydraulic floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The grass cutting disc connecting plate (7) is provided with a depth adjustment hole for cooperating with the limit bolt.

3. A hydraulically floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The cylinder connecting shaft (2) is mounted on the main beam frame (1) and located above the grass cutting disc lower connecting shaft (3).

4. A hydraulic floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The length of the lower connecting rod (4) of the grass cutting disc is greater than the length of the side connecting rod (5) of the grass cutting disc.

5. A hydraulically floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The lower connecting rod (4) of the grass cutting disc and the side connecting rod (5) of the grass cutting disc are spaced apart along the length direction of the main beam frame (1).

6. A hydraulically floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: One end of the side connecting rod (5) of the grass cutting disc is rotatably connected to the main beam frame (1) via a pin.

7. A hydraulically floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The main beam frame (1) is detachably connected to the front of the seeder via a suspension arm.

8. A hydraulically floating front-mounted grass-cutting device for a no-till planter according to claim 1, characterized in that: The rodless chamber of the regulating cylinder (6) is connected to an oil passage for supplying pressurized oil.

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