Calibrating device for suspension liquid device of tractor

Abstract

The invention discloses a tractor suspension liquid device calibration device, and relates to the technical field of agricultural machinery, the tractor suspension liquid device calibration device comprises a connecting plate as a bearing main body, the connecting plate is rotatably connected with a rotating frame, the connecting plate is provided with symmetrically distributed hydraulic cylinders, piston rods in the hydraulic cylinders are connected with the rotating frame, and the connecting plate is fixedly connected with symmetrically distributed oil pipes; second hoses are connected between the oil outlet ends of the oil pipes and the adjacent liquid inlet pipes, symmetrically-distributed fixing cylinders are fixedly connected to the connecting plate, and oil storage cylinders are fixedly connected into the symmetrically-distributed fixing cylinders. By means of pressure relief and buffering mechanisms, it is ensured that the rotating frame can still keep the stable working height after being impacted, the problem that the rotating frame sinks due to hydraulic oil leakage is solved, damage to key components such as a hydraulic cylinder, a pipeline and a valve body caused by instantaneous impact force is effectively reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and particularly relates to a calibration device for a tractor suspension hydraulic device. Background Art

[0002] The hydraulic suspension device connects agricultural implements (such as plows, harrows, seeders, etc.) to the tractor to form an integral unit, and transmits the lifting force and traction force of the tractor through the hydraulic system, enabling the agricultural implements to complete operations such as tillage, seeding, and harvesting. In the non-operating state (such as during transportation or turning), the hydraulic device can lift the agricultural implement to a certain height to avoid contact with the ground; during operation, the hydraulic device lowers the agricultural implement to a suitable working position to ensure that the agricultural implement can effectively complete the operation task.

[0003] However, in practical applications, especially in a complex working environment with a rough terrain (such as a farmland containing rocks and hard soil clods), the collision between the agricultural implement and underground obstacles will generate a huge instantaneous impact force, which is likely to cause irreversible damage to the suspension system, affecting the normal use and operation efficiency of the equipment. The traditional hydraulic system lacks a dynamic pressure relief protection mechanism, resulting in damage to the oil cylinder, pipeline, and even the valve body due to overload, shortening the service life of the system; the conventional hydraulic system relies on a simple one-way valve or mechanical locking device to prevent oil backflow, but under long-term operation or extreme loads, the hydraulic valve core is prone to micro-leakage due to wear or seal failure, resulting in the agricultural implement being unable to maintain the set height (such as the plow sinking during deep tillage operation), affecting the operation accuracy.

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

[0005] In order to overcome the shortcomings that the traditional tractor suspension hydraulic device is vulnerable to instantaneous impact force in a complex working environment, lacks a dynamic pressure relief protection mechanism, and is prone to micro-leakage, the present invention provides a calibration device for a tractor suspension hydraulic device.

[0006] A calibration device for a tractor suspension hydraulic device includes a connecting plate as a load-bearing main body. A rotating frame is rotatably connected to the connecting plate. Symmetrically distributed hydraulic cylinders are provided on the connecting plate. Liquid inlet pipes and pressure relief pipes are provided on the symmetrically distributed hydraulic cylinders. Symmetrically distributed round holes are opened on the pressure relief pipes. The piston rods in the hydraulic cylinders are connected to the rotating frame. Symmetrically distributed oil pipes are fixedly connected to the connecting plate. Second hoses are connected between the oil outlet ends of the oil pipes and the adjacent liquid inlet pipes. Symmetrically distributed fixed cylinders are fixedly connected to the connecting plate. Oil storage cylinders are fixedly connected in the symmetrically distributed fixed cylinders. Liquid inlet pipes and return pipes are provided in the symmetrically distributed oil storage cylinders. First hoses are connected between the liquid inlet pipes and the adjacent pressure relief pipes. Elastic components for controlling their opening and closing are provided in the liquid inlet pipes.

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

[0008] Optionally, a first one-way valve is provided between each oil storage cylinder and the adjacent oil pipe to control the flow direction of the hydraulic oil.

[0009] Optionally, a cross-shaped pipe is provided at the outlet of the return pipe of each uniformly distributed oil storage cylinder. An opening and closing sleeve is rotatably connected inside each cross-shaped pipe. A torsion spring is connected between each 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 fixedly connected to each liquid guide frame. A clamping groove is formed inside the lifting frame. Each opening and closing sleeve is located inside the adjacent clamping groove. The outlet of the cross-shaped pipe is communicated with the pressure relief pipe of the hydraulic cylinder through a third hose.

[0010] Optionally, a second one-way valve for controlling its flow direction is provided on the third hose.

[0011] Optionally, a movable plug is slidably connected to each side of the oil storage cylinder away from each other. A second spring is connected between each movable plug and the adjacent oil storage cylinder. Each second spring is wound around the adjacent movable plug.

[0012] Optionally, electric push rods are installed on the symmetrically distributed oil storage cylinders. The telescopic end of each electric push rod is connected with a oil replenishing rod. A fourth hose is connected between the oil replenishing rod and the adjacent oil pipe.

[0013] Optionally, a liquid flow sensor is provided on the liquid inlet pipe of each hydraulic cylinder. The liquid flow sensor and the adjacent electric push rod are electrically connected through a control module.

[0014] Optionally, the oil inlet ends of the symmetrically distributed oil pipes are all processed with internal threads and are screwed and connected with the threaded interfaces on the oil supply device through threads.

[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 mechanisms, the present invention ensures that the rotating frame can still maintain a stable working height after being impacted, avoids the problem of the rotating frame sinking caused by hydraulic oil leakage, effectively reduces the damage to key components such as hydraulic cylinders, pipelines and valve bodies caused by instantaneous impact force, and prolongs the service life of the equipment.

[0017] By adding a spare oil circuit switching mechanism, the present invention effectively solves the problem of abnormal hydraulic oil flow caused by the blockage of the second hose, ensures the continuous normal operation of the hydraulic system, maintains pressure balance, reduces the risk of equipment damage, and improves the intelligent level and operation reliability of the system. Description of the Drawings

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

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

[0020] Figure 3 This is a three-dimensional structure diagram of components such as the oil pipe, the first one-way valve, and the oil storage cylinder of the present invention.

[0021] Figure 4 This is a three-dimensional structure sectional view of components such as the oil storage cylinder, the second hose, and the hydraulic cylinder of the present invention.

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

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

[0024] Figure 7 This is a three-dimensional structure diagram of components such as the oil storage cylinder, the third hose, and the torsion spring of the present invention.

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

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

[0027] Figure 10 This is a three-dimensional structure sectional view of components such as the piston, the second spring, and the oil storage cylinder of the present invention.

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

[0029] Figure 12 This is a three-dimensional structure sectional view of components such as the oil filling rod, the fourth hose, and the oil storage cylinder of the present invention.

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

[0031] In the above figures: 101 - connecting plate, 102 - rotating frame, 103 - hydraulic cylinder, 104 - fixed cylinder, 105 - oil storage cylinder, 1051 - fixing piece, 106 - first hose, 107 - oil pipe, 1071 - second hose, 108 - liquid guiding frame, 109 - first spring, 110 - first one-way valve, 201 - opening and closing sleeve, 202 - torsion spring, 203 - lifting frame, 204 - second one-way valve, 205 - third hose, 301 - movable plug, 302 - second spring, 401 - electric push rod, 402 - oil filling rod, 403 - fourth hose, 404 - liquid flow sensor, 501 - filter screen. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not limit the present invention.

[0033] Embodiment 1: A calibration device for a tractor suspension liquid device, as Figures 1-4 、 Figure 13 shown, including a connecting plate 101 as a load-bearing main body. Symmetrically distributed threaded holes are provided on the connecting plate 101. A rotating frame 102 is rotatably connected to the front side of the connecting plate 101. Hydraulic cylinders 103 symmetrically distributed left and right are provided on the connecting plate 101. Liquid inlet pipes and pressure relief pipes are provided on the symmetrically distributed hydraulic cylinders 103. Symmetrically distributed round holes are provided on the pressure relief pipes. The piston rods in the hydraulic cylinders 103 are 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 both processed with internal threads and are screwed and connected to the threaded interfaces on the oil supply device through threads;

[0034] Second hoses 1071 are connected between the oil outlet ends of the oil pipes 107 and the adjacent liquid inlet pipes. Two fixed cylinders 104 symmetrically distributed left and right are fixedly connected to the connecting plate 101. An oil storage cylinder 105 is fixedly connected in each fixed cylinder 104. Liquid inlet pipes and return pipes are provided in the two oil storage cylinders 105. First hoses 106 are connected between the liquid inlet pipes and the adjacent pressure relief pipes. Elastic components for controlling their opening and closing are provided in the liquid inlet pipes. First one-way valves 110 are provided between the oil storage cylinders 105 and the adjacent oil pipes 107 to control the flow direction of hydraulic oil. A filter screen 501 is provided in the pressure relief pipes to filter impurities in the hydraulic oil.

[0035] As Figure 5 shown, the elastic component includes a fixing piece 1051. A fixing piece 1051 is fixedly connected in the liquid inlet pipe of each oil storage cylinder 105. Each liquid guiding frame 108 is slidably connected in the fixing piece 1051. First springs 109 are connected between the liquid guiding frames 108 and the adjacent fixing pieces 1051. The first springs 109 are respectively wound around the adjacent liquid guiding frames 108.

[0036] AsFigure 6 , Figure 7 and Figure 8 As shown in Figure 6 , Figure 7 and Figure 8 , cross-shaped tubes are provided at the outlet of the return pipes of the evenly distributed oil storage cylinders 105. A switching sleeve 201 is rotatably connected in each cross-shaped tube. Liquid outlet holes are formed in each switching sleeve 201. A torsion spring 202 is connected between each switching sleeve 201 and the adjacent cross-shaped tube. Each torsion spring 202 is wound around the adjacent switching sleeve 201. A lifting frame 203 is fixedly connected to the outside of each liquid guide frame 108. A clamping groove is formed in the lifting frame 203. Each switching sleeve 201 is located in the adjacent clamping groove. The outlet of the cross-shaped tube is communicated with the pressure relief pipe of the hydraulic cylinder 103 through a third hose 205. A second one-way valve 204 is provided on each third hose 205 to control the flow direction of the hydraulic oil.

[0037] As Figure 9 and Figure 10 As shown in Figure 9 and Figure 10 , movable plugs 301 are slidably connected to the mutually remote side walls of the oil storage cylinders 105. A second spring 302 is connected between each movable plug 301 and the adjacent oil storage cylinder 105. Each second spring 302 is wound around the adjacent movable plug 301.

[0038] During use, first fix the connecting plate 101 to the tractor with bolts to ensure stability and immobility, and screw the threaded interface on the oil supply device tightly with the oil pipe 107 to ensure tightness. At this time, the hydraulic oil in the oil supply device is transported to the liquid inlet pipe of the hydraulic cylinder 103 through the oil pipe 107 and the second hose 1071, pushing the piston in the hydraulic cylinder 103 to move. Since a first one-way valve 110 is installed between the oil pipe 107 and the oil storage cylinder 105, the hydraulic oil in the oil pipe 107 cannot enter the oil storage cylinder 105, and the hydraulic oil in the oil storage cylinder 105 flows to the oil pipe 107 and returns to the oil supply device, forming a hydraulic circuit.

[0039] The staff can transmit the lifting force and traction force of the tractor through the hydraulic system to control the rotation frame 102 (agricultural tools such as plows and harrows) to work. As described in the background art, when working in a complex terrain (such as a farmland containing rocks and hard soil clods), a huge instantaneous impact force will be generated when the rotation frame 102 collides with underground obstacles. This impact force is transmitted to the piston rod of the hydraulic cylinder 103 through the rotation frame 102, causing the piston rod to bear a huge pressure.

[0040] When the internal pressure of the hydraulic cylinder 103 exceeds the set threshold, the hydraulic cylinder 103 will release part of the hydraulic oil through the pressure relief pipe to reduce the system pressure and prevent the hydraulic cylinder 103 and other components from being damaged due to overload. The hydraulic oil will quickly break through the liquid guide frame 108 through the first hose 106 and the filter screen 501 and flow into the oil storage cylinder 105. The first spring 109 will deform. As the filtered hydraulic oil flows into the oil storage cylinder 105, the gas in the oil storage cylinder 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, further alleviating the impact of the impact force on the hydraulic system. After the impact force is relieved, the elastic restoring force of the first spring 109 pulls the liquid guide frame 108 back to its original position, and the elastic restoring force of the second spring 302 pushes the movable plug 301 back to its original position, and the system pressure gradually returns to normal.

[0041] At the same time, when the liquid guiding frame 108 is flushed open by the hydraulic oil, the liquid guiding frame 108 will hook the opening and closing sleeve 201 through the lifting frame 203 and rotate a certain angle, and the torsion spring 202 will be twisted, so that the liquid outlet in the opening and closing sleeve 201 is offset from the return pipe outlet and the inlet of the third hose 205, and the return pipe is temporarily closed to prevent the hydraulic oil from flowing back. When the impact force is relieved, the liquid guiding frame 108 will also drive the lifting frame 203 to return to its original position. Under the action of the torsion spring 202, the opening and closing sleeve 201 is reversed and reset, so that the liquid outlet in the opening and closing sleeve 201 is realigned with the return pipe outlet 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 storage barrel 105 will be pushed into its return pipe, and then return to the hydraulic cylinder 103 through the opening and closing sleeve 201 and the third hose 205, and the system resumes normal working state. In summary, through the pressure relief and buffer mechanism, it is ensured that the rotating frame 102 can still maintain a stable working height after the impact, avoiding the sinking problem of the rotating frame 102 due to hydraulic oil leakage, effectively reducing the damage of the instantaneous impact force to key components such as the hydraulic cylinder 103, pipelines and valve bodies, and extending the service life of the equipment.

[0043] Embodiment 2: Based on embodiment 1, Figures 11-13 As shown, an electric push rod 401 is installed on each oil storage cylinder 105, and the telescopic end of each electric push rod 401 is connected to an oil replenishing rod 402. A fourth hose 403 is connected between each oil replenishing rod 402 and the adjacent oil pipe 107. A liquid flow sensor 404 is provided on the liquid inlet pipe of each hydraulic cylinder 103, and the liquid flow sensor 404 and the adjacent electric push rod 401 are electrically connected through a control module.

[0044] When the second hose 1071 becomes blocked, it will cause the hydraulic oil to fail to flow normally, thus affecting the working balance of the hydraulic system and further having an adverse impact on the normal operation of the rotating frame 102. To solve this problem, a spare oil circuit switching mechanism is designed.

[0045] The specific operation is as follows: When the flow rate of the hydraulic oil in the second hose 1071 is lower than the set threshold, the liquid flow sensor 404 will detect an abnormality and control the electric push rod 401 to drive the oil replenishing rod 402 to move backward. The oil replenishing rod 402 will insert into the return pipe of the oil storage cylinder 105 to open the spare oil circuit, so that the hydraulic oil in the oil supply device flows into the hydraulic cylinder 103 through the fourth hose 403, the oil replenishing rod 402, the return pipe, and the third hose 205, ensuring the continuous normal operation of the hydraulic system. In summary, by adding a spare 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 intelligent level and operation reliability of the system.

[0046] The above embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A tractor suspension hydraulic device calibration device, comprising a connecting plate (101) as a bearing body, a rotating frame (102) being rotatably connected to the connecting plate (101), symmetrically distributed hydraulic cylinders (103) being provided on the connecting plate (101), liquid inlet pipes and pressure relief pipes being provided on the symmetrically distributed hydraulic cylinders (103), symmetrically distributed circular holes being provided on the pressure relief pipes, piston rods in the hydraulic cylinders (103) being connected to the rotating frame (102), symmetrically distributed oil pipes (107) being fixedly connected to the connecting plate (101), and second hoses (1071) being connected between the oil outlet ends of the oil pipes (107) and the adjacent liquid inlet pipes, wherein: The connecting plate (101) is fixedly connected with symmetrically distributed fixed cylinders (104), and oil storage cylinders (105) are fixedly connected inside the symmetrically distributed fixed cylinders (104). Liquid inlet pipes and return pipes are arranged inside the symmetrically distributed oil storage cylinders (105). A first hose (106) is connected between the liquid inlet pipe and the adjacent pressure relief pipe, and an elastic component for controlling the opening and closing of the liquid inlet pipe is arranged inside the liquid inlet pipe.

2. A tractor suspension fluid device calibration device according to claim 1, characterized in that: The elastic component comprises a fixing plate (1051), a fixing plate (1051) is fixedly connected in the liquid inlet pipe of each oil storage cylinder (105), a liquid guide frame (108) is slidably connected in each fixing plate (1051), a first spring (109) is connected between the liquid guide frame (108) and the adjacent fixing plate (1051), and the symmetrically distributed first springs (109) are all wound around the adjacent liquid guide frames (108).

3. A tractor suspension fluid device calibration device according to claim 2, characterized in that: A first one-way valve (110) is provided between the oil storage cylinder (105) and the adjacent oil pipe (107) for controlling the flow direction of the hydraulic oil.

4. A tractor suspension fluid device calibration device according to claim 3, characterized in that: A cross-shaped tube is provided at the outlet of the return pipe of the evenly distributed oil storage cylinder (105), an opening and closing sleeve (201) is rotatably connected in each cross-shaped tube, a torsion spring (202) is connected between the opening and closing sleeve (201) and the adjacent cross-shaped tube, each torsion spring (202) is wound around the adjacent opening and closing sleeve (201), a lifting frame (203) is fixedly connected to each liquid guide frame (108), a slot is provided in the lifting frame (203), each opening and closing sleeve (201) is located in the adjacent slot, and the outlet of the cross-shaped tube is connected to the pressure relief pipe of the hydraulic cylinder (103) through a third hose (205).

5. A tractor suspension fluid device calibration device according to claim 4, characterized in that: The third hose (205) is provided with a second one-way valve (204) for controlling its flow direction.

6. A tractor suspension fluid device calibration device according to claim 5, characterized in that: The sides of the oil storage cylinders (105) that are away from each other are slidably connected with movable plugs (301), and second springs (302) are connected between the movable plugs (301) and the adjacent oil storage cylinders (105), and each second spring (302) is wound around the adjacent movable plugs (301).

7. A tractor suspension fluid device calibration device according to claim 6, characterized in that: The symmetrically distributed oil storage cylinders (105) are all equipped with electric push rods (401), the telescopic end of each electric push rod (401) is connected to an oil replenishing rod (402), and a fourth hose (403) is connected between the oil replenishing rod (402) and the adjacent oil pipe (107).

8. A tractor suspension fluid device calibration device according to claim 7, characterized in that: A liquid flow sensor (404) is provided on the liquid inlet pipe of each hydraulic cylinder (103), and the liquid flow sensor (404) and the adjacent electric push rod (401) are electrically connected through a control module.

9. A tractor suspension fluid device calibration device according to claim 8, characterized in that: The oil inlet ends of the symmetrically distributed oil pipes (107) are all processed with internal threads, and are screwed and connected with the threaded interfaces on the oil supply device through threads.

10. A tractor suspension fluid device calibration device according to claim 9, characterized in that: A filter screen (501) is provided in the pressure relief pipe.

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