Tractor mounted hydraulic implement calibration device

Abstract

The application discloses a tractor suspension liquid device calibration device and relates to the technical field of agricultural machinery. The calibration device comprises a connecting plate serving as a bearing main body, a rotating frame rotatably connected to the connecting plate, symmetrical hydraulic cylinders arranged on the connecting plate, piston rods in the hydraulic cylinders connected to the rotating frame, symmetrical oil pipes fixedly connected to the connecting plate, second hoses connected between oil outlet ends of the oil pipes and adjacent liquid inlet pipes, symmetrical fixing cylinders fixedly connected to the connecting plate, and oil storage cylinders fixedly connected to the symmetrical fixing cylinders. The calibration device is provided with a pressure relief and buffering mechanism, so that the rotating frame can still maintain a stable working height after impact, the problem of sinking of the rotating frame caused by leakage of hydraulic oil is avoided, damage of instantaneous impact force to key components such as hydraulic cylinders, pipelines and valve bodies is effectively reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a tractor suspension fluid calibration device. Background Technology

[0002] A hydraulic suspension system connects agricultural implements (such as plows, harrows, and seeders) to a tractor, forming a unified system. It transmits the tractor's lifting and traction forces through a hydraulic system, enabling the implements to perform tasks such as tilling, sowing, and harvesting. In non-operating states (such as during transport or turning), the hydraulic system can raise the implements to a certain height to prevent them from contacting the ground. During operation, the hydraulic system lowers the implements to a suitable working position, ensuring that the implements can effectively complete the task.

[0003] However, in practical applications, especially in complex working environments (such as farmland containing rocks and hard soil), the collision of implements with underground obstacles generates enormous instantaneous impact forces. These impact forces can easily cause irreversible damage to the suspension system, affecting the normal use and operational efficiency of the equipment. Traditional hydraulic systems lack dynamic pressure relief protection mechanisms, leading to damage to cylinders, pipelines, and even valve bodies due to overload, thus shortening the system's service life. Conventional hydraulic systems rely on simple check valves or mechanical locking devices to prevent oil backflow, but under prolonged operation or extreme loads, hydraulic valve cores are prone to slight leakage due to wear or seal failure, causing implements to fail to maintain the set height (such as the plow sinking during deep tillage), affecting operational accuracy.

[0004] Based on the above situation, there is an urgent need for a tractor suspension fluid calibration device. Summary of the Invention

[0005] To overcome the shortcomings of traditional tractor suspension fluid devices, such as susceptibility to instantaneous impact forces in complex operating environments, lack of dynamic pressure relief protection mechanisms, and susceptibility to minor leaks, this invention provides a tractor suspension fluid device calibration device.

[0006] A tractor suspension fluid calibration device includes a connecting plate as the main support, a rotating frame rotatably connected to the connecting plate, symmetrically distributed hydraulic cylinders on the connecting plate, each hydraulic cylinder having an inlet pipe and a pressure relief pipe, the pressure relief pipe having symmetrically distributed circular holes, a piston rod inside the hydraulic cylinder connected to the rotating frame, symmetrically distributed oil pipes fixed to the connecting plate, each oil pipe outlet being connected to an adjacent inlet pipe with a second flexible hose, symmetrically distributed fixed cylinders fixed to the connecting plate, each fixed cylinder having an oil reservoir fixed inside, each oil reservoir having an inlet pipe and a return pipe, each inlet pipe being connected to an adjacent pressure relief pipe with a first flexible hose, and an elastic component controlling its opening and closing inside the inlet pipe.

[0007] Optionally, the elastic component includes a fixing plate, and a fixing plate is fixedly connected inside the liquid inlet pipe of each oil reservoir. A liquid guide frame is slidably connected inside each fixing plate. A first spring is connected between the liquid guide frame and the adjacent fixing plate. The symmetrically distributed first springs are all wound around the adjacent liquid guide frames.

[0008] Optionally, a first check valve is provided between the oil reservoir and the adjacent oil pipe to control the flow direction of hydraulic oil.

[0009] Optionally, the outlet of the return pipe of the evenly distributed oil reservoir is provided with a cross-shaped pipe, and each cross-shaped pipe is rotatably connected with an opening and closing sleeve. A torsion spring is connected between the opening and closing sleeve and the adjacent cross-shaped pipe. Each torsion spring is wound around the adjacent opening and closing sleeve. A lifting frame is fixed to each liquid guide frame. A slot is opened in the lifting frame. Each opening and closing sleeve is located in the adjacent slot. The outlet of the cross-shaped pipe is connected to the pressure relief pipe of the hydraulic cylinder through a third hose.

[0010] Optionally, the third hose is provided with a second one-way valve to control its flow direction.

[0011] Optionally, each of the oil reservoirs on the opposite sides is slidably connected to a movable plug, and a second spring is connected between the movable plug and the adjacent oil reservoir, with each second spring wrapped around the adjacent movable plug.

[0012] Optionally, each of the symmetrically distributed oil reservoirs is equipped with an electric push rod, and the telescopic end of each electric push rod is connected to an oil replenishing rod. A fourth hose is connected between the oil replenishing rod and the adjacent oil pipe.

[0013] Optionally, each hydraulic cylinder is equipped with a liquid flow sensor on its inlet pipe, and the liquid flow sensor is electrically connected to the adjacent electric push rod through a control module.

[0014] Optionally, the inlet ends of the symmetrically distributed oil pipes are all machined with internal threads, and are connected to the threaded interface on the oil supply device by screwing them together.

[0015] Optionally, a filter screen is provided in the pressure relief pipe.

[0016] The present invention has the following advantages: Through the pressure relief and buffering mechanism, the present invention ensures that the rotating frame can maintain a stable working height after impact, avoids the problem of the rotating frame sinking due to hydraulic oil leakage, effectively reduces the damage of instantaneous impact force to key components such as hydraulic cylinders, pipelines and valve bodies, and extends the service life of the equipment.

[0017] This invention effectively solves the problem of abnormal hydraulic oil flow caused by blockage of the second hose by adding a backup oil circuit switching mechanism, ensuring the continuous normal operation of the hydraulic system, maintaining pressure balance, reducing the risk of equipment damage, and improving the system's intelligence level and operational reliability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the oil pipe, the first one-way valve, and the oil reservoir.

[0021] Figure 4 This is a three-dimensional structural cross-sectional view of the components of the present invention, including the oil reservoir, the second hose, and the hydraulic cylinder.

[0022] Figure 5 This is a three-dimensional structural cross-sectional view of the components of the present invention, such as the fixing plate, the first spring, and the liquid guide frame.

[0023] Figure 6 This is a three-dimensional structural diagram of the lifting frame, the third hose, and the first hose of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the oil reservoir, the third hose, and the torsion spring of the present invention.

[0025] Figure 8 This is a three-dimensional structural cross-sectional view of the liquid guide frame, lifting frame, and second one-way valve of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the oil storage cylinder of the present invention.

[0027] Figure 10 This is a three-dimensional structural cross-sectional view of the movable plug, second spring, and oil reservoir of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the components of the present invention, such as the oil replenishment rod and the liquid flow sensor.

[0029] Figure 12 This is a three-dimensional cross-sectional view of the components of the present invention, including the oil replenishment rod, the fourth hose, and the oil reservoir.

[0030] Figure 13 This is a three-dimensional structural cross-sectional view of the first hose, hydraulic cylinder, and filter screen components of the present invention.

[0031] In the attached diagrams: 101-connecting plate, 102-rotating frame, 103-hydraulic cylinder, 104-fixed cylinder, 105-oil reservoir, 1051-fixed plate, 106-first hose, 107-oil pipe, 1071-second hose, 108-liquid guide frame, 109-first spring, 110-first check valve, 201-opening sleeve, 202-torsion spring, 203-lifting frame, 204-second check valve, 205-third hose, 301-moving plug, 302-second spring, 401-electric push rod, 402-oil replenishing rod, 403-fourth hose, 404-liquid flow sensor, 501-filter screen. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0033] Example 1: A tractor suspension fluid calibration device, such as Figures 1-4 , Figure 13 As shown, it includes a connecting plate 101 as the main load-bearing body. The connecting plate 101 has symmetrically distributed threaded holes. A rotating frame 102 is rotatably connected to the front side of the connecting plate 101. The connecting plate 101 is provided with hydraulic cylinders 103 symmetrically distributed on the left and right. Each of the symmetrically distributed hydraulic cylinders 103 is provided with an inlet pipe and a pressure relief pipe. The pressure relief pipe has symmetrically distributed round holes. The piston rod inside the hydraulic cylinder 103 is connected to the rotating frame 102. Two oil pipes 107 are fixedly connected to the connecting plate 101. The oil inlet ends of the two oil pipes 107 are machined with internal threads and are connected to the threaded interface on the oil supply device by screwing them together.

[0034] The oil outlet of the oil pipe 107 is connected to the adjacent inlet pipe with a second hose 1071. Two fixed cylinders 104 are fixedly attached to the connecting plate 101, which are symmetrically distributed. Each fixed cylinder 104 has an oil reservoir 105 fixedly attached inside. Both oil reservoirs 105 are provided with an inlet pipe and a return pipe. The inlet pipe is connected to the adjacent pressure relief pipe with a first hose 106. The inlet pipe is provided with an elastic component to control its opening and closing. The oil reservoir 105 is provided with a first check valve 110 between it and the adjacent oil pipe 107 to control the flow direction of hydraulic oil. The pressure relief pipe is provided with a filter screen 501 to filter impurities in the hydraulic oil.

[0035] like Figure 5 As shown, the elastic component includes a fixing plate 1051. Each oil reservoir 105 has a fixing plate 1051 fixedly connected to its inlet pipe. Each liquid guide 108 is slidably connected to the fixing plate 1051. A first spring 109 is connected between the liquid guide 108 and the adjacent fixing plate 1051. The first spring 109 is wound around the adjacent liquid guide 108.

[0036] like Figure 6 , Figure 7 and Figure 8 As shown, the outlet of the return pipe of the uniformly distributed oil reservoir 105 is provided with a cross-shaped pipe. Each cross-shaped pipe is rotatably connected with an opening and closing sleeve 201. Each opening and closing sleeve 201 has a liquid outlet hole. A torsion spring 202 is connected between the opening and closing sleeve 201 and the adjacent cross-shaped pipe. Each torsion spring 202 is wound around the adjacent opening and closing sleeve 201. A lifting frame 203 is fixed to the outside of each liquid guide frame 108. A slot is opened in the lifting frame 203. Each opening and closing sleeve 201 is located in the adjacent slot. The outlet of the cross-shaped pipe is connected to the pressure relief pipe of the hydraulic cylinder 103 through a third hose 205. Each third hose 205 is provided with a second one-way valve 204 to control the flow direction of hydraulic oil.

[0037] like Figure 9 and Figure 10 As shown, movable plugs 301 are slidably connected to the side walls of the oil reservoirs 105 that are far apart from each other. A second spring 302 is connected between each movable plug 301 and the adjacent oil reservoir 105. Each second spring 302 is wound around the adjacent movable plug 301.

[0038] In use, first fix the connecting plate 101 to the tractor with bolts to ensure stability, and tighten the threaded interface on the oil supply device to the oil pipe 107 to ensure a tight seal. At this time, the hydraulic oil in the oil supply device is delivered to the inlet pipe of the hydraulic cylinder 103 through the oil pipe 107 and the second hose 1071, which pushes the piston in the hydraulic cylinder 103 to move. Since the first check valve 110 is installed between the oil pipe 107 and the oil reservoir 105, the hydraulic oil in the oil pipe 107 cannot enter the oil reservoir 105, while the hydraulic oil in the oil reservoir 105 flows to the oil pipe 107 and back to the oil supply device, forming a hydraulic circuit.

[0039] Workers can use the hydraulic system to transmit the lifting and traction forces of the tractor and control the rotating frame 102 (agricultural implements, such as plows and harrows) to work. As mentioned in the background art, when working in complex terrain (such as farmland containing rocks and hard soil), the collision between the rotating frame 102 and underground obstacles will generate a huge instantaneous impact force. This impact force is transmitted through the rotating frame 102 to the piston rod of the hydraulic cylinder 103, causing the piston rod to bear huge pressure.

[0040] When the internal pressure of the hydraulic cylinder 103 exceeds the set threshold, the hydraulic cylinder 103 will release some hydraulic oil through the pressure relief pipe to reduce the system pressure and prevent damage to the hydraulic cylinder 103 and other components due to overload. The hydraulic oil will quickly rush through the first hose 106 and filter screen 501 to open the guide frame 108 and flow into the oil reservoir 105. The first spring 109 will deform. As the filtered hydraulic oil flows into the oil reservoir 105, the gas in the oil reservoir 105 is compressed and the pressure increases, thereby pushing the movable plug 301 to move outward. The second spring 302 is compressed to absorb the impact energy and further mitigate the impact force on the hydraulic system. After the impact force is relieved, the elastic restoring force of the first spring 109 will pull the guide frame 108 back to its original position, and the elastic restoring force of the second spring 302 will push the movable plug 301 back to its original position. The system pressure gradually returns to normal.

[0041] Meanwhile, when the guide frame 108 is pushed open by hydraulic oil, the guide frame 108 will hook the opening and closing sleeve 201 through the lifting frame 203 and rotate it by a certain angle. The torsion spring 202 is twisted, so that the liquid outlet in the opening and closing sleeve 201 is misaligned with the outlet of the return pipe and the inlet of the third hose 205, temporarily closing the return pipe to prevent hydraulic oil from flowing back. When the impact force is relieved, the guide frame 108 will also drive the lifting frame 203 back to its original position. Under the action of the torsion spring 202, the opening and closing sleeve 201 reverses and resets, so that the liquid outlet in the opening and closing sleeve 201 is realigned with the outlet of the return pipe and the inlet of the third hose 205.

[0042] Then, after the movable plug 301 is pushed back to its original position, the hydraulic oil in the oil reservoir 105 will be pushed into its return pipe, and then back to the hydraulic cylinder 103 through the opening and closing sleeve 201 and the third hose 205. The system returns to normal working condition. In summary, through the pressure relief and buffering mechanism, the rotating frame 102 can maintain a stable working height after the impact, avoiding the problem of the rotating frame 102 sinking due to hydraulic oil leakage. This effectively reduces the damage of instantaneous impact force to key components such as the hydraulic cylinder 103, pipelines and valve body, and extends the service life of the equipment.

[0043] Example 2: Based on Example 1, such as Figures 11-13 As shown, each oil reservoir 105 is equipped with an electric push rod 401, and the telescopic end of each electric push rod 401 is connected to an oil replenishing rod 402. Each oil replenishing rod 402 is connected to a fourth hose 403 between itself and the adjacent oil pipe 107. Each hydraulic cylinder 103 is equipped with a liquid flow sensor 404 on its inlet pipe. The liquid flow sensor 404 and the adjacent electric push rod 401 are electrically connected through a control module.

[0044] If the second hose 1071 becomes blocked, the hydraulic oil will not be able to flow normally, which will affect the working balance of the hydraulic system and thus have an adverse effect on the normal operation of the rotating frame 102. In order to solve this problem, a mechanism for adding a backup oil circuit switching is designed.

[0045] The specific operation is as follows: When the flow rate of hydraulic oil in the second hose 1071 is lower than the set threshold, the liquid flow sensor 404 will detect the abnormality and control the electric push rod 401 to drive the oil replenishing rod 402 to move backward. The oil replenishing rod 402 will be inserted into the return pipe of the oil reservoir 105, opening the backup oil circuit. This allows the hydraulic oil in the oil supply device to flow into the hydraulic cylinder 103 through the fourth hose 403, the oil replenishing rod 402, the return pipe, and the third hose 205, ensuring that the hydraulic system continues to work normally. In summary, by adding a backup oil circuit switching mechanism, the problem of abnormal hydraulic oil flow caused by the blockage of the second hose 1071 is effectively solved, ensuring the continuous normal operation of the hydraulic system, maintaining pressure balance, reducing the risk of equipment damage, and improving the system's intelligence level and operational reliability.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A tractor suspension fluid calibration device, comprising a connecting plate (101) serving as the main load-bearing body, a rotating frame (102) rotatably connected to the connecting plate (101), symmetrically distributed hydraulic cylinders (103) on the connecting plate (101), each of the symmetrically distributed hydraulic cylinders (103) being provided with an inlet pipe and a pressure relief pipe, the pressure relief pipe having symmetrically distributed circular holes, the piston rod inside the hydraulic cylinder (103) being connected to the rotating frame (102), symmetrically distributed oil pipes (107) fixedly connected to the connecting plate (101), the oil outlet end of the oil pipe (107) being connected to the adjacent inlet pipe with a second flexible hose (1071), characterized in that: A symmetrically distributed fixed cylinder (104) is fixedly connected to the connecting plate (101). An oil storage cylinder (105) is fixedly connected inside each of the symmetrically distributed fixed cylinders (104). An inlet pipe and a return pipe are provided inside each of the symmetrically distributed oil storage cylinders (105). A first hose (106) is connected between the inlet pipe and the adjacent pressure relief pipe. An elastic component for controlling its opening and closing is provided inside the inlet pipe. The elastic component includes a fixing plate (1051), and a fixing plate (1051) is fixedly connected inside the liquid inlet pipe of each oil reservoir (105). A liquid guide frame (108) is slidably connected inside each fixing plate (1051). A first spring (109) is connected between the liquid guide frame (108) and the adjacent fixing plate (1051). The symmetrically distributed first springs (109) are all wound around the adjacent liquid guide frame (108). A first check valve (110) is provided between the oil reservoir (105) and the adjacent oil pipe (107) to control the flow direction of hydraulic oil; The outlet of the return pipe of the uniformly distributed oil reservoir (105) is provided with a cross-shaped pipe. Each cross-shaped pipe is rotatably connected with an opening and closing sleeve (201). The opening and closing sleeve (201) is connected to the adjacent cross-shaped pipe with a torsion spring (202). Each torsion spring (202) is wound around the adjacent opening and closing sleeve (201). Each liquid guide frame (108) is fixedly connected with a lifting frame (203). The lifting frame (203) has a slot. Each opening and closing sleeve (201) is located in the adjacent slot. The outlet of the cross-shaped pipe is connected to the pressure relief pipe of the hydraulic cylinder (103) through a third hose (205). The third hose (205) is equipped with a second one-way valve (204) to control its flow direction; Each of the oil reservoirs (105) has a movable plug (301) slidably connected to the opposite side. Each movable plug (301) is connected to a second spring (302) between itself and the adjacent oil reservoir (105). Each second spring (302) is wound around the adjacent movable plug (301).

2. A tractor suspension fluid calibration device according to claim 1, characterized in that: Electric push rods (401) are installed on the symmetrically distributed oil storage tanks (105). Each electric push rod (401) is connected to an oil replenishing rod (402) at its telescopic end. A fourth hose (403) is connected between the oil replenishing rod (402) and the adjacent oil pipe (107).

3. A tractor suspension fluid calibration device according to claim 2, characterized in that: Each hydraulic cylinder (103) is equipped with a liquid flow sensor (404) on its inlet pipe. The liquid flow sensor (404) and the adjacent electric push rod (401) are electrically connected through a control module.

4. A tractor suspension fluid calibration device according to claim 3, characterized in that: The oil inlet ends of the symmetrically distributed oil pipes (107) are all machined with internal threads, which are connected to the threaded interface on the oil supply device by screwing them together.

5. A tractor suspension fluid calibration device according to claim 4, characterized in that: The pressure relief pipe is equipped with a filter screen (501).

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