A wheeled tractor reed hydraulic cutting device

Abstract

The utility model discloses a kind of wheeled tractor reed hydraulic cutting equipment, including support frame body, hydraulic push rod mechanism, cutting knife mechanism, reed fixed-length platform, hydraulic drive system, coupling and equipment lifting connecting rod.Hydraulic push rod mechanism is set on door type support frame body, and cutting knife mechanism is driven to move vertically, realize the fixed-point cutting of reed;Cutting knife mechanism is matched with guide groove, keeps cutting process stable;Lower fixed-length platform is equipped, to ensure that reed cutting length is consistent;Hydraulic system controls tool up-down action by reversing valve, and is driven in linkage with tractor power output end, improves operation efficiency and adaptability.The utility model compact structure, installation is convenient, and it is applicable to mechanized harvesting of reed in wetland, river bank and other environments, with the advantages of high efficiency, cutting neat, stable operation etc..

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a hydraulic reed cutting device for wheeled tractors. Background Technology

[0002] Reeds are a plant with important ecological, economic, and papermaking raw material value, widely distributed in wetlands, lakes, and riverbanks. Traditionally, harvesting them has relied heavily on manual labor, which is labor-intensive, inefficient, and poses safety and cost risks in wetland areas. With the development of agricultural mechanization, some areas have begun using simple mechanical devices for reed cutting; however, existing machinery often suffers from fragmented structures, limited functionality, and poor adaptability, failing to meet the comprehensive requirements of modern agriculture for efficiency, precision, and adaptability.

[0003] Existing reed cutting equipment mainly suffers from the following technical problems: The inappropriate power matching and transmission methods mean that many existing devices cannot be effectively integrated with agricultural power equipment such as tractors, requiring separate power sources, resulting in high energy consumption, complex structures, and high maintenance costs. Some electric motor-dependent devices are limited in use in wetland environments, posing difficulties in obtaining power and safety hazards.

[0004] The cutting mechanism is unstable and has poor synchronization. Most current mechanical cutting devices adopt a single-sided cutting structure or pulley chain drive, which is prone to unstable tool operation, jamming, or even cutting off. Especially in wetland reed environments, the cutting load fluctuates greatly, and the requirements for the synchronization and stability of the mechanism are high.

[0005] The lack of a precise length control structure and the fact that existing equipment typically lacks an effective length limit design leads to inconsistent cutting lengths, affecting subsequent processing, transportation, and utilization. This is especially problematic in industrial processing scenarios where the raw materials require uniform lengths.

[0006] The overall structure has poor versatility, is inconvenient to disassemble and transport, and most of the equipment is only suitable for a certain type of crop. There is a lack of special support and connection structures for the operation environment of dense reed wetlands, making it difficult to move and relocate. There is also a lack of standardized interfaces when assembling with tractors, which is not conducive to its widespread use.

[0007] Therefore, there is an urgent need to provide a reed cutting device that can be used with tractors, has reasonable power matching, reliable cutting structure, high operating efficiency, and fixed-length cutting function, in order to overcome the shortcomings of the existing technology. Summary of the Invention

[0008] To solve the above-mentioned technical problems, this utility model provides a wheeled tractor-mounted hydraulic reed cutting device.

[0009] This utility model is achieved through the following technical solution: This utility model discloses a wheeled tractor-mounted hydraulic reed cutting device, comprising: The support frame includes a portal frame and a base fixedly connected to the ends of the two legs of the portal frame; A hydraulic push rod mechanism mounted on a portal frame, wherein the extension direction of the hydraulic push rod mechanism is vertically downward; A cutting blade mechanism connected to and driven by a hydraulic push rod mechanism is used for cutting reeds. A reed-length-fixed platform is installed below the hydraulic push rod mechanism and the cutting blade mechanism to support the reeds; A hydraulic drive system that is fitted and connected to a hydraulic push rod mechanism; A coupling that connects the power take-off end of a wheeled tractor to its hydraulic drive system; The lifting linkage is the equipment lifting mechanism that connects the wheeled tractor lifting mechanism to the support frame.

[0010] This equipment is based on a hydraulically driven cutting principle. A support frame mounted on a wheeled tractor provides excellent structural stability and ease of movement. The gantry frame offers longitudinal rigid support, and its fixed connection to the base effectively distributes the vertical force generated by the hydraulic push rod mechanism during operation. The hydraulic push rod mechanism is the key power actuator; in conjunction with the cutting blade mechanism at its end, it enables rapid and uniform cutting of reeds placed on a fixed-length platform. A coupling efficiently links the tractor's power take-off shaft with the hydraulic drive system, achieving a closed-loop power system. The addition of a lifting linkage ensures the device can be raised off the ground when not in operation, preventing accidental cutting or damage during non-operational periods.

[0011] Furthermore, the aforementioned hydraulic push rod mechanism includes two push rods; the two push rods are arranged in a mirror-symmetrical manner and are respectively fitted and connected to the cutting blade mechanism; The aforementioned push rods include: A rod tube fixedly connected to the upper end of the portal frame, wherein the axis is arranged vertically; A telescopic rod installed inside the rod tube and arranged coaxially with the rod tube, which can move up and down along the central axis of the rod tube; The internal structure of the aforementioned rod cylinder is divided into two chambers by a telescopic rod. The chamber without the telescopic rod is called the rodless chamber, and the chamber with the telescopic rod is called the rod chamber. Both the rodless chamber and the rod chamber are provided with hydraulic oil ports. Except for the hydraulic oil ports, which allow hydraulic oil to enter and exit, the other positions of the chambers are sealed.

[0012] The two push rods are arranged in a mirror-symmetrical manner. This structure maintains the force balance of the tool holder during cutting and avoids uneven loading or tool wobbling caused by unilateral force. The rod cylinder, serving as the outer shell of the push rod, is vertically positioned, conforming to the operational logic of gravity and helping to save space and improve response speed. The telescopic rod moves axially within the rod cylinder, its movement controlled by the hydraulic difference between the rodless and rod-side chambers. This dual-chamber structure ensures that when pressurized oil enters the rodless chamber, the telescopic rod quickly depresses to achieve the cutting action; conversely, when pressurized oil enters from the rod-side chamber, the telescopic rod retracts, resetting the cutting tool. This sealed design effectively prevents hydraulic oil leakage, improving the overall system's service life and reliability.

[0013] Furthermore, the aforementioned cutting blade mechanism includes: It is long and narrow, with plugs at both ends, and is a tool holder that is fitted and connected to the pre-set linear guide grooves on the two legs of the gantry frame; A clamping plate fixedly connected to the lower end of the tool holder; The knife is detachably and fixedly connected to the tool holder via a clamping plate; The clamping plate is long and narrow, with a through groove running through its long side. The knife is inserted into the through groove and clamped and fixed by several set bolts.

[0014] The blade holder, through the sliding engagement between the plug and the guide groove, ensures a linear motion trajectory under the push rod, guaranteeing linear stability during the cutting process. The detachable connection between the clamping plate and the blade allows users to easily replace the blade as needed based on its wear, improving equipment maintenance efficiency and operational flexibility. The through-slot structure provides a positioning channel for the blade, while the set bolt secures the blade through friction locking, preventing blade displacement when cutting high-density or wet, heavy reeds. This mechanism ensures efficient, continuous, and controllable cutting operations.

[0015] Furthermore, the aforementioned reed length-fixing platform includes: The cutting table, which is plate-shaped and arranged perpendicularly to the gantry frame legs, is located below the hydraulic push rod mechanism and the cutting blade mechanism and is fixedly connected to the base. A baffle that is arranged perpendicular to the cutting table and parallel to the legs of the gantry frame, and is located at the rear of the cutting table; The baffle is connected to the base via a linkage assembly located below the cutting table. The linkage assembly includes two insert rods and a crossbar. The insert rods and the crossbar are arranged perpendicularly. The two ends of the crossbar are fixedly connected to the two bases respectively. The insert rods are inserted into the through holes provided on the crossbar. The insert rods and the crossbar are temporarily fixed by set bolts.

[0016] The reed length-fixing platform design ensures a reliable positioning foundation for reed cutting. The cutting table supports the lower part of the reed being cut, preventing displacement or rolling under the action of the blade, while the baffle restricts the horizontal movement of the reed, thus controlling the cutting length. The linkage assembly allows users to temporarily adjust the position of the baffle according to different reed lengths, adapting to different operational needs. The set bolt connection ensures stability while also providing convenience for disassembly and maintenance.

[0017] Furthermore, the aforementioned hydraulic drive system includes: A hydraulic pump that is fitted and connected with a coupling and has one oil inlet and one oil outlet; The hydraulic oil tank is equipped with two return ports and one outlet port; It is equipped with a pressure relief valve with one oil inlet, one oil outlet and one oil return port; A three-position four-way directional valve equipped with P port, A port, B port and T port; A rodless chamber three-way valve that is simultaneously connected to two push rods; A rod-type three-way valve that is simultaneously connected to two push rods; The oil inlet of the hydraulic pump is connected to the oil outlet of the hydraulic oil tank via a pipeline; the oil outlet of the hydraulic pump is connected to the oil inlet of the pressure relief valve via a pipeline. The oil outlet of the aforementioned pressure relief valve is connected to the P port of the three-position four-way directional valve; the oil return port of the aforementioned pressure relief valve is connected to an oil return port on the hydraulic oil tank via a pipeline. Port A of the aforementioned three-position four-way directional valve is connected to a rodless chamber three-way valve via a pipeline, and the rodless chamber three-way valve is connected to two rodless chambers respectively. The B port of the aforementioned three-position four-way directional valve is connected to a rod-chamber three-way valve via a pipeline, and the rod-chamber three-way valve is connected to two rod chambers respectively. The T port of the aforementioned three-position four-way directional valve is connected to another return port on the hydraulic oil tank via a pipeline.

[0018] The hydraulic drive system employs a closed-loop power circuit, ensuring high-efficiency hydraulic energy conversion. The hydraulic pump is driven by a wheeled tractor, with power transmitted via a coupling. Hydraulic oil is introduced into the rodless or rod-side chamber of the push rod through a three-position four-way directional valve, enabling extension and retraction. The directional valve features a three-position four-way structure, allowing for forward, reverse, and neutral states to adapt to complex cutting conditions. Two three-way valves are used to distribute hydraulic oil to the corresponding chambers of the two push rods, ensuring synchronized operation and improving cutting accuracy and coordination.

[0019] The three-position four-way directional control valve is a typical hydraulic control valve whose function is to control the flow direction of hydraulic oil between actuators (such as hydraulic cylinders and hydraulic motors). The "three-position" indicates that the directional control valve has three working positions: neutral, left, and right; the "four-way" indicates that the directional control valve has four ports, namely P port (oil inlet), A port (control port), B port (control port), and T port (oil return port).

[0020] Port P connects to the high-pressure hydraulic oil source, i.e., the outlet of the hydraulic pump. This port provides power hydraulic oil to the entire system.

[0021] Port A connects to a rodless chamber three-way valve, which in turn connects to the rodless chambers of the two push rods to control the extension action.

[0022] Port B connects to a rod-side three-way valve, which in turn connects to the rod-side chambers of the two push rods to control the retraction action.

[0023] The T-port is the return port, which connects to the return port of the hydraulic oil tank and is used to discharge low-pressure oil to form a complete circuit.

[0024] In the neutral position, ports P, A, B, and T can be configured as fully closed, fully open, or connected via specific pathways, depending on the valve core design. For example, this solution recommends a neutral return type (three ports connected to T, P disconnected) to ensure system pressure relief and energy saving.

[0025] By manipulating the electromagnet or handle of the reversing valve, hydraulic oil can be directed to port A or port B, achieving synchronous extension and retraction of the push rod, thereby driving the cutting blade mechanism to move up and down to complete the reed cutting operation.

[0026] Pressure relief valves primarily function as protective devices in hydraulic systems, serving as crucial components to prevent damage caused by excessive pressure. A typical structure includes a valve body, spring, adjusting screw, and control valve core.

[0027] When the system pressure does not reach the set value, the pressure relief valve is closed, and the high-pressure oil is sent to the three-position four-way directional valve through the P port to continue supplying power; when the system pressure exceeds the critical value set in the valve body (set by the spring preload), the control valve core is pushed open by the oil, and part of the high-pressure oil flows back to the hydraulic oil tank through the return port, thereby preventing the system from overloading.

[0028] In this patented device, a pressure relief valve is installed in the high-pressure circuit between the hydraulic pump and the three-position four-way directional valve. It has one inlet, one outlet, and one return port. The outlet supplies oil to port P, and the return port returns oil to the tank. It immediately relieves pressure in case of abnormal pressure, protecting not only the hydraulic pump and actuators but also ensuring operator safety.

[0029] Furthermore, a filter is installed on the pipeline between the hydraulic pump inlet and the hydraulic oil tank outlet; a filter is installed on the pipeline between the pressure relief valve return port and the hydraulic oil tank return port; and a filter is installed on the pipeline between the T port of the three-position four-way directional valve and the hydraulic oil tank return port.

[0030] Hydraulic systems require extremely high cleanliness of hydraulic oil during operation. Even tiny impurities can cause valve jamming, cylinder wear, or even system failure. Therefore, installing a filter at the hydraulic pump inlet helps to initially purify the hydraulic oil drawn into the tank, preventing impurities from entering the high-pressure system. A filter is also installed in the return path of the pressure relief valve to intercept metal shavings generated by friction or gum-like debris from aging pipes during system return, extending the service life of the oil and components. Installing a filter at the T-port of the directional valve provides final purification of the entire system's pressure relief path, further improving the overall stability and reliability of the system. This multi-layered filtration strategy ensures a high level of hydraulic safety even under complex outdoor operating conditions.

[0031] The hydraulic circuit of this equipment is equipped with at least three key filters, each consisting of a steel shell, a filter element (which can be made of paper, metal mesh, or composite material), and inlet and outlet ports. The filters have a microporous structure, typically achieving a filtration accuracy of –μm, and are used to intercept particles, iron filings, rubber debris, and other contaminants in the hydraulic oil.

[0032] The three filters are located at: On the hydraulic pump inlet pipe: used to filter the oil from the hydraulic oil tank to prevent impurities from entering the hydraulic pump and causing wear or blockage; Between the pressure relief valve return port and the hydraulic oil tank: used to filter the oil flowing back from the system due to overpressure, ensuring that the return oil in the tank is clean; Between the T port of the three-position four-way directional valve and the hydraulic oil tank: used to control the cleanliness of the oil in the return oil channel and prevent sediment from entering the oil tank after long-term operation in the system.

[0033] These filters are typically designed to be replaceable or washable for easy maintenance. In agricultural machinery that operates frequently in the field, filter design is one of the key guarantees of durability.

[0034] Furthermore, the aforementioned coupling includes two universal joints, a square tube, and a square rod, the square tube and square rod being movably connected to each other and each being fitted and connected to one universal joint; the two universal joints are respectively connected to the hydraulic pump and the power output end of the wheeled tractor.

[0035] As a transmission component, the coupling's structural design fully considers the spatial and angular offsets between the tractor's power take-off shaft and the hydraulic pump. The use of a universal joint allows the drive shaft to adapt to small angular changes while ensuring stable torque transmission during rotation. The sliding plug-in structure between the square tube and square rod not only allows for fine-tuning in the length direction to accommodate different tractor models or modifications, but also allows for a certain degree of axial expansion and contraction during operation, reducing axial stress concentration in the coupling caused by vehicle bumps. This coupling structure is particularly suitable for the high-vibration, high-frequency starting environments of outdoor agricultural machinery.

[0036] Furthermore, the aforementioned lifting linkage is an arc-shaped rod, with its two ends connected to the base and the tractor's lifting mechanism, respectively. Under the action of the tractor's lifting mechanism, it can drive the entire structure to rotate upward with the connection point between the lifting linkage and the tractor as the center.

[0037] The lifting linkage of the equipment features an arc-shaped profile, which provides better stress distribution characteristics during force transmission and facilitates the rotational lifting of the support frame during tractor lifting operations. One end of the linkage connects to the base, while the other end is connected to the tractor's lifting mechanism via a pin or plug-in connection, forming a rotatable linkage system. The tractor lifting mechanism is typically a hydraulic or mechanical jacking device. When activated, the lifting linkage rotates around its connection point with the tractor, lifting the entire cutting device off the ground, enabling the equipment to be mobile in standby, relocation, or non-operational states. This structure significantly improves the equipment's adaptability and safety during work breaks, avoiding wear or collision risks caused by the cutter contacting the ground.

[0038] The lifting mechanism of a tractor converts the tractor's power into a vertical or tilting lifting action, and is commonly used for raising and lowering towed agricultural implements. In modern agricultural tractors, the lifting mechanism is generally part of a three-point suspension system and is hydraulically driven.

[0039] The mechanism mainly consists of the following components: Hydraulic cylinder: Driven by oil supply from the tractor's internal hydraulic system, it extends and retracts, causing the suspension arm to move up and down.

[0040] Upper pull arm and lower suspension arm: In the form of a "triangular bracket", they connect the support points of agricultural implements or equipment; Lifting linkage or lifting frame: connected to the base, driven by the hydraulic cylinder to drive the reed cutting equipment to achieve the overall lifting action; Limiting device: Used to set the maximum lifting height to prevent the equipment from rising too high, causing mechanical interference or instability.

[0041] In this invention, the lifting linkage is connected to the lifting mechanism. Relying on the power provided by the hydraulic lifting system built into the tractor, the linkage drives the support frame to rotate as a whole, so that the cutting device can be lifted off the ground during transportation, relocation, and non-operation, effectively avoiding damage or jamming of the cutter.

[0042] The lifting mechanism of a tractor, especially the hydraulic three-point suspension system, is one of the most widely used and mature technologies in agricultural machinery. This mechanism typically includes hydraulic cylinders, an upper arm, a lower arm, a lifting rod, and a regulating valve, enabling rapid attachment and lifting control of agricultural implements. It is widely used in the suspension and maneuvering of agricultural implements such as rotary tillers, seeders, plows, and mowers.

[0043] In this patented device, the lifting linkage is connected to the tractor's original lifting mechanism. The lifting action of the linkage drives the support frame to rotate and lift as a whole. This linkage method is a standardized and modular interface design in the field of agricultural machinery connection. It is a common matching structure between existing agricultural machinery and operating equipment.

[0044] Therefore, this utility model does not modify the structure or control method of the tractor lifting mechanism. It only achieves linkage with this equipment through an arc-shaped lifting linkage based on the known lifting system. This connection method is a direct application of the existing mechanical assembly concept and does not constitute a technical innovation.

[0045] The beneficial effects of this utility model are: it achieves efficient and stable cutting of reeds, and significantly improves work efficiency; The cutting blade moves up and down synchronously to ensure accurate cutting stroke and neat cut; It is equipped with a fixed-length platform to effectively control the cutting length and improve material utilization. The hydraulic drive system is linked to the tractor's power unit, reducing energy consumption and improving adaptability; The overall structure is compact, and assembly and disassembly are convenient, making it suitable for relocation operations; It is equipped with multi-stage filters to improve the service life and stability of the hydraulic system; The cutting action is flexibly controlled by a three-position four-way directional valve, which ensures good operational safety and responsiveness. The design utilizes the linkage between the tractor lifting mechanism and the equipment lifting linkage to facilitate equipment lifting and transportation; It can be applied to the needs of concentrated reed harvesting in different terrains and wetland environments, thus expanding its application scenarios. Attached Figure Description

[0046] Figure 1 : A three-dimensional structural schematic diagram of this utility model; Figure 2 Another three-dimensional structural schematic diagram of this utility model; Figure 3 : A three-dimensional structural diagram showing the installation positions of each component of this utility model; Figure 4 Another three-dimensional structural diagram showing the installation positions of the various components of this utility model; Figure 5 : A three-dimensional structural diagram of the reed length-fixing platform of this utility model; Figure 6 : A schematic diagram of the hydraulic push rod mechanism and the cutting blade mechanism of this utility model; Figure 7 : A three-dimensional sectional view of the hydraulic push rod mechanism and cutting blade mechanism of this utility model; Figure 8 : Schematic diagram of the oil circuit during the downward cutting action of this utility model; Figure 9 : Schematic diagram of the oil circuit routing during the retraction action of this utility model; Figure 10 : Schematic diagram of the oil circuit routing during pressure relief in this utility model; Figure 11 : A schematic diagram of the working state of this utility model; In the diagram: 1-Support frame, 2-Hydraulic push rod mechanism, 3-Cut knife mechanism, 4-Reed length-fixed platform, 5-Hydraulic drive system, 6-Coupling, 7-Equipment lifting linkage, A-Wheel tractor, 11-Gantry frame, 12-Base, 21-Push rod, 211-Rod cylinder, 212-Telescopic rod, 213-Rodless chamber, 214-Rod chamber, 31-Knife holder, 32-Clamping plate, 33-Knife, 41-Cut table, 42-Baffle, 51-Hydraulic pump, 52-Hydraulic oil tank, 53-Pressure relief valve, 54-Three-position four-way directional valve, 55-Rodless chamber three-way valve, 56-Rod chamber three-way valve. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Example: Figure 1-11 As shown, a wheeled tractor-mounted hydraulic reed cutting device includes: The support frame 1 includes a portal frame 11 and a base 12 fixedly connected to the ends of the two legs of the portal frame 11. The hydraulic push rod mechanism 2 is installed on the portal frame 11, and the extension direction of the hydraulic push rod mechanism 2 is vertically downward; The cutting blade mechanism 3, connected to the hydraulic push rod mechanism 2 and driven by the hydraulic push rod mechanism 2, is used to cut reeds; The reed-length platform 4, located below the hydraulic push rod mechanism 2 and the cutting blade mechanism 3, is used to support the reeds; The hydraulic drive system 5 is fitted and connected to the hydraulic push rod mechanism 2; Coupling 6 connects the power output end of the wheeled tractor to the hydraulic drive system 5; The lifting linkage 7 connects the wheeled tractor lifting mechanism to the support frame 1.

[0048] This equipment is based on a hydraulically driven cutting principle. The support frame 1, mounted on a wheeled tractor, provides excellent structural stability and ease of movement. The gantry frame 11 provides longitudinal rigid support for the overall structure, and its fixed connection to the base 12 effectively distributes the vertical force generated by the hydraulic push rod mechanism 2 during operation. The hydraulic push rod mechanism 2 is the key power execution unit; together with the cutting blade mechanism 3 at its end, it enables rapid and uniform cutting of reeds placed on the reed length-fixed platform 4. The coupling 6 efficiently links the tractor's power take-off shaft with the hydraulic drive system 5, achieving a closed-loop power system. The addition of the lifting linkage 7 ensures the equipment can be raised off the ground when not in operation, thus preventing accidental cutting or damage during non-operational periods.

[0049] Furthermore, the aforementioned hydraulic push rod mechanism 2 includes two push rods 21; the two push rods 21 are arranged in a mirror symmetrical manner and are respectively fitted and connected to the cutting blade mechanism 3; The aforementioned push rod 21 includes: The rod tube 211 is fixedly connected to the upper end of the portal frame 11, and its axis is arranged vertically; A telescopic rod 212 is installed inside the rod cylinder 211 and arranged coaxially with the rod cylinder 211, and can move up and down along the central axis of the rod cylinder 211. The interior of the aforementioned rod cylinder 211 is divided into two chambers by the telescopic rod 212. The chamber without the telescopic rod 212 is called the rodless chamber 213, and the chamber with the telescopic rod 212 is called the rod chamber 214. The rodless chamber 213 and the rod chamber 214 are respectively provided with hydraulic oil ports. Except for the hydraulic oil ports, which allow hydraulic oil to enter and exit, the other positions of the chambers are sealed.

[0050] The two push rods 21 are arranged in a mirror-symmetrical manner. This structure maintains the force balance of the tool holder during cutting and avoids uneven loading or tool wobbling caused by unilateral force. The rod cylinder 211 serves as the outer shell of the push rods 21, and its vertical arrangement not only conforms to the action logic of gravity direction but also helps save space and improve response speed. The telescopic rod 212 moves axially within the rod cylinder 211, and its movement is controlled by the hydraulic difference between the rodless chamber 213 and the rod chamber 214. This dual-chamber structure ensures that when pressurized oil enters the rodless chamber 213, the telescopic rod 212 quickly presses down to achieve the cutting action; and when pressurized oil enters from the rod chamber 214, the telescopic rod 212 retracts, completing the reset of the cutting tool. This sealed design effectively avoids hydraulic oil leakage, improving the service life and reliability of the overall system.

[0051] Furthermore, the aforementioned cutting blade mechanism 3 includes: The tool holder 31 is long and narrow, with plugs at both ends, and is fitted and connected to the pre-set linear guide grooves on the two legs of the gantry frame 11. A clamping plate 32 is fixedly connected to the lower end of the tool holder 31; The blade 33 is detachably and fixedly connected to the blade holder 31 via the clamping plate 32; The clamping plate 32 is long and narrow, with a through groove running through its long side. The knife 33 is inserted into the through groove and clamped and fixed by several set bolts.

[0052] The blade holder 31, through the sliding engagement between the plug and the guide groove, ensures a linear motion trajectory under the push of the push rod 21, guaranteeing linear stability during the cutting process. The detachable connection between the clamping plate 32 and the blade 33 allows users to easily replace the blade according to its wear, improving equipment maintenance efficiency and operational flexibility. The through-slot structure provides a positioning channel for the blade 33, while the set bolt secures the blade through friction locking, preventing blade displacement when cutting high-density or wet, heavy reeds. This mechanism ensures efficient, continuous, and controllable cutting operations.

[0053] Furthermore, the aforementioned reed length-fixing platform 4 includes: The cutting table 41 is a plate-shaped component located below the hydraulic push rod mechanism 2 and the cutting blade mechanism 3, arranged perpendicularly to the legs of the gantry frame 11, and fixedly connected to the base 12. A baffle 42 is arranged perpendicular to the cutting table 41 and parallel to the legs of the gantry frame 11, and is located at the rear side of the cutting table 41. The baffle 42 is connected to the base 12 via a connecting rod assembly located below the cutting table 41. The connecting rod assembly includes two insert rods and a crossbar. The insert rods and the crossbar are arranged perpendicularly. The two ends of the crossbar are fixedly connected to the two bases 12 respectively. The insert rods are inserted into the through holes provided on the crossbar. The insert rods and the crossbar are temporarily fixed by set bolts.

[0054] The design of the reed length-fixing platform 4 ensures a reliable positioning foundation for the reeds during cutting. The cutting table 41 supports the lower part of the reed being cut, preventing displacement or rolling under the action of the blade, while the baffle 42 restricts the horizontal movement of the reed, thus controlling the cutting length. The linkage assembly allows users to temporarily adjust the position of the baffle 42 according to different reed lengths, adapting to different operational needs. The set bolt connection ensures stability while also providing convenience for disassembly and maintenance.

[0055] Furthermore, the aforementioned hydraulic drive system 5 includes: A hydraulic pump 51, which is fitted and connected to the coupling 6, is provided with an oil inlet and an oil outlet. The hydraulic oil tank 52 is equipped with two return ports and one outlet port; A pressure relief valve 53 is provided with an oil inlet, an oil outlet, and an oil return port; A three-position four-way directional valve 54 is equipped with P port, A port, B port and T port; Simultaneously connected to two push rods 21 is a rodless chamber three-way valve 55; Simultaneously connected to two push rods 21 is a rod-shaped three-way valve 56; The oil inlet of the hydraulic pump 51 is connected to the oil outlet of the hydraulic oil tank 52 via a pipeline; the oil outlet of the hydraulic pump 51 is connected to the oil inlet of the pressure relief valve 53 via a pipeline. The oil outlet of the aforementioned pressure relief valve 53 is connected to the P port of the three-position four-way directional valve 54; the oil return port of the aforementioned pressure relief valve 53 is connected to an oil return port on the hydraulic oil tank 52 via a pipeline. The A port of the aforementioned three-position four-way directional valve 54 is connected to the rodless chamber three-way valve 55 via a pipeline. The rodless chamber three-way valve 55 is connected to two rodless chambers 213 respectively. The B port of the aforementioned three-position four-way directional valve 54 is connected to the rod chamber three-way valve 56 via a pipeline, and the rod chamber three-way valve 56 is connected to two rod chambers 214 respectively. The T port of the aforementioned three-position four-way directional valve 54 is connected to another return port on the hydraulic oil tank 52 via a pipeline.

[0056] The hydraulic drive system 5 employs a closed-loop power circuit, ensuring high-efficiency hydraulic energy conversion. The hydraulic pump 51 is driven by a wheeled tractor, transmitting power via coupling 6. Hydraulic oil is introduced into the rodless chamber 213 or rod chamber 214 of the push rod 21 through a three-position four-way directional valve 54, enabling extension and retraction. The directional valve 54 has a three-position four-way structure, allowing for forward, backward, and neutral state transitions to adapt to complex cutting conditions. Three-way valves 55 and 56 are used to distribute hydraulic oil to the corresponding chambers of the two push rods 21, ensuring synchronized operation and improving cutting accuracy and coordination.

[0057] Among them, the three-position four-way directional valve 54 is a typical hydraulic control valve, whose function is to control the flow direction of hydraulic oil between actuators (such as hydraulic cylinders and hydraulic motors). The "three-position" indicates that the directional valve has three working positions: neutral, left, and right; the "four-way" indicates that the directional valve has four oil ports, namely P port (oil inlet), A port (control port 1), B port (control port 2), and T port (oil return port).

[0058] Port P connects to the high-pressure hydraulic oil source, namely the oil outlet of hydraulic pump 51. This port provides power hydraulic oil for the entire system.

[0059] Port A connects to the rodless chamber three-way valve 55, which in turn connects to the rodless chamber 213 of the two push rods 21, for controlling the extension action.

[0060] Port B connects to the rod chamber three-way valve 56, which in turn connects to the rod chamber 214 of the two push rods 21, for controlling the retraction action.

[0061] The T port is the return port, which is connected to the return port of the hydraulic oil tank 52 to discharge low-pressure oil and form a complete circuit.

[0062] In the neutral position, ports P, A, B, and T can be configured as fully closed, fully open, or connected via specific pathways, depending on the valve core design. For example, this solution recommends a neutral return type (three ports connected to T, P disconnected) to ensure system pressure relief and energy saving.

[0063] By manipulating the electromagnet or handle of the reversing valve 54, hydraulic oil can be directed to port A or port B, realizing the synchronous extension and retraction of the push rod 21, thereby driving the cutting blade mechanism 3 to move up and down to complete the reed cutting operation.

[0064] The pressure relief valve 53 primarily serves a protective function in hydraulic systems, acting as a crucial component to prevent system damage due to excessive pressure. Its typical structure includes a valve body, spring, adjusting screw, and control valve core.

[0065] When the system pressure does not reach the set value, the pressure relief valve is closed, and the high-pressure oil is sent to the three-position four-way directional valve 54 through the P port to continue to supply power; when the system pressure exceeds the critical value set in the valve body (set by the spring preload), the control valve core is pushed open by the oil, and part of the high-pressure oil flows back to the hydraulic oil tank 52 through the return port, thereby preventing the system from overloaded.

[0066] In this patented device, the pressure relief valve 53 is installed in the high-pressure circuit between the hydraulic pump 51 and the three-position four-way directional valve 54. It has an oil inlet, an oil outlet, and a return port. The oil outlet supplies oil to port P, and the oil return port returns to the oil tank. It can immediately relieve pressure in case of abnormal pressure, which not only protects the hydraulic pump 51 and the actuator, but also ensures the safety of the operator.

[0067] Furthermore, a filter is installed on the pipeline between the oil inlet of the hydraulic pump 51 and the oil outlet of the hydraulic oil tank 52; a filter is installed on the pipeline between the oil return port of the pressure relief valve 53 and the oil return port of the hydraulic oil tank 52; and a filter is installed on the pipeline between the T port of the three-position four-way directional valve 54 and the oil return port of the hydraulic oil tank 52.

[0068] Hydraulic systems require extremely high cleanliness of hydraulic oil during operation. Even tiny impurities can cause valve jamming, cylinder wear, or even system failure. Therefore, installing a filter at the inlet of the hydraulic pump 51 helps to initially purify the hydraulic oil drawn into the tank 52, preventing impurities from entering the high-pressure system. A filter is also installed in the return path of the pressure relief valve 53 to intercept metal shavings generated by friction or gum-like debris from aging pipes during system return, extending the service life of the oil and components. Installing a filter at the T-port of the directional valve 54 provides final purification of the entire system's pressure relief path, further improving the overall stability and reliability of the system. This multi-layered filtration strategy ensures a high level of hydraulic safety even under complex outdoor operating conditions.

[0069] The hydraulic circuit of this equipment is equipped with at least three key filters, each consisting of a steel shell, a filter element (which can be made of paper, metal mesh, or composite material), and inlet and outlet ports. The filters have a microporous structure, typically with a filtration accuracy of 10–50 μm, and are used to intercept particles, iron filings, rubber debris, etc., in the hydraulic oil.

[0070] The three filters are located at: On the oil inlet pipe of hydraulic pump 51: used to filter the oil from hydraulic oil tank 52 to prevent impurities from entering the hydraulic pump and causing wear or blockage; Between the pressure relief valve 53 return port and the hydraulic oil tank 52: used to filter the oil flowing back from the system due to overpressure, ensuring that the return oil in the tank is clean; Between the T port of the three-position four-way directional valve 54 and the hydraulic oil tank 52: used to control the cleanliness of the oil in the return oil channel and prevent sediment from entering the oil tank after long-term operation in the system.

[0071] These filters are typically designed to be replaceable or washable for easy maintenance. In agricultural machinery that operates frequently in the field, filter design is one of the key guarantees of durability.

[0072] Furthermore, the aforementioned coupling 6 includes two universal joints, a square tube, and a square rod, the square tube and square rod being movably connected to each other and each being fitted and connected to a universal joint; the two universal joints are respectively connected to the hydraulic pump 51 and the power output end of the wheeled tractor.

[0073] As a transmission component, coupling 6 is structurally designed to fully consider the spatial and angular offsets between the tractor's power take-off shaft and the hydraulic pump 51. The use of a universal joint allows the drive shaft to adapt to small angular changes while ensuring the stability of torque transmission during rotation. The sliding plug-in structure between the square tube and the square rod not only allows for fine-tuning in the length direction to adapt to different models or modified tractor layouts, but also allows for a certain degree of axial expansion and contraction during operation, reducing axial stress concentration in the coupling caused by vehicle bumps. This coupling structure is particularly suitable for high-vibration, high-frequency starting operating scenarios of outdoor agricultural machinery.

[0074] Furthermore, the aforementioned lifting linkage 7 is an arc-shaped rod, with its two ends connected to the base 12 and the tractor's lifting mechanism, respectively. Under the action of the tractor's lifting mechanism, it can drive the entire structure to rotate upward with the connection point between the lifting linkage 7 and the tractor as the center.

[0075] The lifting linkage 7 of the equipment features an arc-shaped profile, which provides better stress distribution characteristics during force transmission and facilitates the rotational lifting of the support frame 1 during tractor lifting operations. One end of the linkage 7 is connected to the base 12, while the other end is connected to the tractor's lifting mechanism via a pin or plug-in connection, forming a rotatable linkage system. The tractor lifting mechanism is typically a hydraulic or mechanical jacking device. When activated, the lifting linkage 7 rotates around its connection point with the tractor as a center of rotation, lifting the entire cutting device off the ground, enabling the equipment to operate in standby, relocation, or non-operational states. This structure significantly improves the equipment's adaptability and safety during work breaks, avoiding wear or collision risks caused by the cutter contacting the ground.

[0076] The lifting mechanism of a tractor converts the tractor's power into a vertical or tilting lifting action, and is commonly used for raising and lowering towed agricultural implements. In modern agricultural tractors, the lifting mechanism is generally part of a three-point suspension system and is hydraulically driven.

[0077] The mechanism mainly consists of the following components: Hydraulic cylinder: Driven by oil supply from the tractor's internal hydraulic system, it extends and retracts, causing the suspension arm to move up and down.

[0078] Upper pull arm and lower suspension arm: In the form of a "triangular bracket", they connect the support points of agricultural implements or equipment; Lifting linkage or lifting frame: connected to base 12, driven by hydraulic cylinder to drive the reed cutting equipment to achieve overall lifting action; Limiting device: Used to set the maximum lifting height to prevent the equipment from rising too high, causing mechanical interference or instability.

[0079] In this utility model, the lifting linkage 7 is connected to the lifting mechanism. Relying on the power provided by the hydraulic lifting system built into the tractor, the linkage drives the support frame 1 to rotate as a whole, so that the cutting device can be lifted off the ground during transportation, relocation, and non-operation, effectively avoiding damage or jamming of the cutting blade.

[0080] The lifting mechanism of a tractor, especially the hydraulic three-point suspension system, is one of the most widely used and mature technologies in agricultural machinery. This mechanism typically includes hydraulic cylinders, an upper arm, a lower arm, a lifting rod, and a regulating valve, enabling rapid attachment and lifting control of agricultural implements. It is widely used in the suspension and maneuvering of agricultural implements such as rotary tillers, seeders, plows, and mowers.

[0081] In this patented device, the lifting linkage 7 is connected to the tractor's original lifting mechanism. With the help of its lifting action, the support frame 1 is rotated and lifted as a whole. This linkage method is a standardized and modular interface design method in the field of agricultural machinery connection. It is a common matching structure between existing agricultural machinery and operating equipment.

[0082] Therefore, this utility model does not modify the structure or control method of the tractor lifting mechanism. It only achieves linkage with this equipment through an arc-shaped lifting linkage based on the known lifting system. This connection method is a direct application of the existing mechanical assembly concept and does not constitute a technical innovation.

[0083] In summary, in this embodiment, the device achieves coordinated operation with the tractor's power system and hydraulic system by fixing the support frame 1 to the lifting mechanism of the wheeled tractor. The support frame 1 consists of a gantry frame 11 and a base 12. Two sets of hydraulic push rod mechanisms 2 (symmetrically arranged) are set on the gantry frame 11, which drive the cutting blade mechanism 3, which is connected to the blade holder 31, clamping plate 32 and blade 33, to move up and down through the telescopic rod 212.

[0084] A reed length-limiting platform 4 is installed at the lower part of the support frame 1 to support and limit the cutting length of the reeds. It consists of a cutting table 41 and a baffle 42, and is detachably connected to the base 12 via a connecting rod assembly. The hydraulic drive system 5 is installed on one side of the portal frame 11 and is connected to the power output end of the tractor via a coupling 6 to realize power input. The hydraulic drive system 5 includes components such as a hydraulic pump 51, a hydraulic oil tank 52, a pressure relief valve 53, a three-position four-way directional valve 54, a rodless chamber three-way valve 55, and a rod chamber three-way valve 56. Hydraulic oil is delivered to the rodless chamber 213 and the rod chamber 214 of the push rod 21 via high-pressure hoses.

[0085] The workflow is as follows: Preparation phase: Drive the wheeled tractor to the reed field work area, start the tractor's main engine, and drive the hydraulic pump 51 through coupling 6. Hydraulic oil in the hydraulic oil tank 52 enters the hydraulic pump 51 through the suction pipe equipped with a filter, is pressurized, and then output. The system pressure is controlled by the pressure relief valve 53 to prevent overpressure from damaging components.

[0086] Hydraulic circuit initialization (three-position four-way directional valve in neutral position): When the directional valve 54 is in the neutral position (usually set to neutral return type), port P is not connected to ports A and B, and port T is connected to the A / B channel, thereby unloading the hydraulic pump. At this time, the system remains in standby mode, the hydraulic pump is still running, but it will not drive any push rod movement, and the cutting blade mechanism 3 is in a stationary state.

[0087] Start the cutting action (reversing valve turns to the left position, oil is supplied to the rodless chamber): The operator moves the reversing valve 54 to the left position. At this time, the internal conduction relationship of the reversing valve is as follows: P port → A port B port → T port Hydraulic oil flows from hydraulic pump 51 through port P to port A, and after being diverted by rodless chamber three-way valve 55, it simultaneously enters the rodless chamber 213 of the two push rods 21, pushing the telescopic rod 212 downwards and causing the connected cutting blade mechanism 3 to press down rapidly, completing the shearing action of the reeds. At the same time, the hydraulic oil in the rod chamber 214 is discharged from port B and flows back to hydraulic oil tank 52 through port T. During the return oil process, it is also purified by a filter.

[0088] After cutting and during the return stroke (reversing valve turns to the right position, oil is supplied to the rod chamber): The operator continues to move the reversing valve 54 to the right position. At this time, the internal conduction relationship is as follows: P port → B port A port → T port Hydraulic oil flows from hydraulic pump 51 through port P to port B, and after being diverted by the rod chamber three-way valve 56, it enters the rod chamber 214 of the two push rods 21, pushing the telescopic rod 212 to retract upwards, thereby moving the cutting blade mechanism 3 to its initial position. At the same time, the hydraulic oil in the rodless chamber 213 flows back to the oil tank from port A through port T.

[0089] Cyclic cutting operation: Steps (3) and (4) above can be repeated after the reeds are continuously placed on the fixed-length platform 4 to achieve high-efficiency mechanical cutting. According to the actual field operation needs, the working position of the reversing valve 54 can be quickly switched by the tractor driver's manual control or electronic control button to achieve automated or semi-automated control.

[0090] Equipment lifting and transfer: After the operation is completed, the operator can operate the hydraulic lifting mechanism on the tractor to lift the entire equipment upward through the arc-shaped lifting linkage 7, so that the support frame 1 is lifted off the ground, which facilitates transportation or turning around at the end of the field and prevents the cutter from colliding.

[0091] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wheeled tractor-mounted hydraulic reed cutting device, characterized in that, include: The support frame (1) includes a portal frame (11) and a base (12) fixedly connected to the ends of the two legs of the portal frame (11). A hydraulic push rod mechanism (2) is installed on the portal frame (11), and the extension direction of the hydraulic push rod mechanism (2) is vertically downward; A cutting blade mechanism (3) connected to the hydraulic push rod mechanism (2) and driven by the hydraulic push rod mechanism (2) is used to cut reeds; A reed-length platform (4) is set below the hydraulic push rod mechanism (2) and the cutting blade mechanism (3) to support the reeds; A hydraulic drive system (5) that is fitted and connected to the hydraulic push rod mechanism (2); A coupling (6) that connects the power output end of a wheeled tractor to the hydraulic drive system (5). The lifting linkage (7) connects the wheeled tractor lifting mechanism to the support frame (1).

2. The wheeled tractor-mounted reed hydraulic cutting device according to claim 1, characterized in that, The hydraulic push rod mechanism (2) includes two push rods (21); the two push rods (21) are arranged in a mirror symmetrical manner and are respectively fitted and connected to the cutting blade mechanism (3); The push rod (21) includes: A rod tube (211) is fixedly connected to the upper end of the portal frame (11), wherein the axis is arranged vertically; A telescopic rod (212) is installed inside the rod tube (211), arranged coaxially with the rod tube (211), and can move up and down along the central axis of the rod tube (211). The inside of the rod cylinder (211) is divided into two chambers by the telescopic rod (212). The chamber without the telescopic rod (212) is called the rodless chamber (213), and the chamber with the telescopic rod (212) is called the rod chamber (214). The rodless chamber (213) and the rod chamber (214) are respectively provided with hydraulic oil ports. Except for the hydraulic oil ports, which allow hydraulic oil to enter and exit, the other positions of the chambers are sealed.

3. A wheeled tractor-mounted hydraulic reed cutting device according to claim 1 or 2, characterized in that, The cutting blade mechanism (3) includes: It is long and narrow, with plugs at both ends, and is connected to the tool holder (31) with the pre-set straight guide grooves on the two legs of the gantry frame (11). A clamping plate (32) is fixedly connected to the lower end of the tool holder (31); The knife (33) is detachably and fixedly connected to the knife holder (31) via the clamping plate (32); The clamping plate (32) is long and narrow, with a through groove running through its long side. The knife (33) is inserted into the through groove and clamped and fixed by several set bolts.

4. A wheeled tractor-mounted hydraulic reed cutting device according to claim 1 or 2, characterized in that, The reed length-fixed platform (4) includes: The cutting table (41) is a plate-shaped piece located below the hydraulic push rod mechanism (2) and the cutting knife mechanism (3), arranged perpendicularly to the legs of the gantry frame (11), and fixedly connected to the base (12). A baffle (42) is arranged perpendicular to the cutting table (41) and parallel to the legs of the gantry frame (11) and is located on the rear side of the cutting table (41). The baffle (42) is connected to the base (12) via a connecting rod assembly located below the cutting table (41). The connecting rod assembly includes two insert rods and a crossbar. The insert rods and the crossbar are arranged perpendicularly. The two ends of the crossbar are fixedly connected to the two bases (12) respectively. The insert rods are inserted into the through holes provided on the crossbar. The insert rods and the crossbar are temporarily fixed by set bolts.

5. A wheeled tractor-mounted hydraulic reed cutting device according to claim 2, characterized in that, The hydraulic drive system (5) includes: A hydraulic pump (51) is fitted and connected to a coupling (6) and is provided with an oil inlet and an oil outlet. A hydraulic oil tank (52) with two return ports and one outlet is provided; A pressure relief valve (53) with an oil inlet, an oil outlet and an oil return port is provided. A three-position four-way directional valve (54) is equipped with P port, A port, B port and T port. At the same time, rodless chamber three-way valves (55) are connected to two push rods (21); Simultaneously connected to two push rods (21) are rod-shaped three-way valves (56); The oil inlet of the hydraulic pump (51) is connected to the oil outlet of the hydraulic oil tank (52) through a pipeline; the oil outlet of the hydraulic pump (51) is connected to the oil inlet of the pressure relief valve (53) through a pipeline. The outlet of the pressure relief valve (53) is connected to the P port of the three-position four-way directional valve (54); the return port of the pressure relief valve (53) is connected to a return port on the hydraulic oil tank (52) through a pipeline. The A port of the three-position four-way reversing valve (54) is connected to the rodless chamber three-way valve (55) through a pipe. The rodless chamber three-way valve (55) is connected to two rodless chambers (213) respectively. The B port of the three-position four-way reversing valve (54) is connected to the rod chamber three-way valve (56) through a pipe. The rod chamber three-way valve (56) is connected to two rod chambers (214) respectively. The T port of the three-position four-way directional valve (54) is connected to another return port on the hydraulic oil tank (52) via a pipeline.

6. The wheeled tractor-mounted reed hydraulic cutting device according to claim 5, characterized in that, A filter is installed on the pipeline between the inlet of the hydraulic pump (51) and the outlet of the hydraulic oil tank (52); a filter is installed on the pipeline between the return port of the pressure relief valve (53) and the return port of the hydraulic oil tank (52); a filter is installed on the pipeline between the T port of the three-position four-way directional valve (54) and the return port of the hydraulic oil tank (52).

7. A wheeled tractor-mounted hydraulic reed cutting device according to claim 5, characterized in that, The coupling (6) includes two universal joints, a square tube and a square rod, the square tube and the square rod being movably connected to each other and respectively fitted and connected to one universal joint; the two universal joints are respectively connected to the hydraulic pump (51) and the power output end of the wheeled tractor.

8. A wheeled tractor-mounted hydraulic reed cutting device according to claim 1 or 2, characterized in that, The lifting linkage (7) of the equipment is an arc-shaped rod, with its two ends connected to the base (12) and the lifting mechanism of the tractor, respectively. Under the action of the lifting mechanism of the tractor, the entire unit can rotate upward with the connection point between the lifting linkage (7) of the equipment and the tractor as the center.

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