Agricultural inflation and deflation system with load sensor and harvester

Abstract

The utility model provides an agricultural inflation and deflation system with load sensors and a harvester, the agricultural inflation and deflation system with the load sensors comprises a pair of load sensors, a control valve group, an air source, a plurality of wheel side valves, a plurality of tires, a front axle and a rear axle, the pair of load sensors are respectively installed on the front axle and the rear axle, and the control valve group is installed on the control valve group. The control valve group is respectively connected with the air source and the plurality of wheel side valves through pipelines, the plurality of wheel side valves are respectively connected with the plurality of tires, and the plurality of tires are respectively arranged on the front axle and the rear axle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a harvesting machine inflation and deflation technical field especially relates to a kind of agricultural inflation and deflation system and harvesting machine with load sensor. BACKGROUND

[0002] Agricultural wheeled harvester belongs to periodic field operation, and is generally provided with a granary in the harvesting machine. The harvested grain is temporarily stored in the granary by the cutting table and the grain cleaning device. As the grain in the granary increases, the load of the whole vehicle increases. When the granary is full, the granary is emptied by the unloading device, and the load of the whole vehicle is reduced. When the load of the whole vehicle is heavy, high tire pressure is needed. High-pressure tires have large carrying capacity, reduce tire deformation and reduce internal heat generation. When the load of the whole vehicle is light, the tire pressure can be appropriately reduced to increase the tire-ground contact area, reduce soil compaction and soil wedge angle caused by soil subsidence, thereby reducing soil resistance and saving fuel. SUMMARY

[0003] The utility model solves the technical problems of the prior art and provides an agricultural inflation and deflation system with a load sensor and a harvester.

[0004] The technical solution for solving the above technical problem is as follows: an agricultural inflation and deflation system with a load sensor, comprising: a pair of load sensors, a control valve group, a gas source, a plurality of wheel edge valves, a plurality of tires, a front axle and a rear axle. The pair of load sensors are installed on the front axle and the rear axle respectively. The control valve group is connected to the gas source and the plurality of wheel edge valves through pipelines. The plurality of wheel edge valves are connected to the plurality of tires respectively. The plurality of tires are installed on the front axle and the rear axle respectively.

[0005] The beneficial effects of the utility model technical solution are: the load sensors monitor the load changes of the front axle and the rear axle, and adjust the tire pressure to adapt to field operation. The agricultural harvester driving stability and operation efficiency are improved, and tire wear and soil compaction are reduced. It is particularly suitable for the case of periodic load changes of the harvester tires. When the load increases, the tire pressure is increased to improve the tire carrying capacity, reduce tire deformation and reduce internal heat generation. When the carrying capacity of the whole vehicle decreases, the tire pressure can be appropriately reduced to increase the tire-ground contact area, thereby reducing soil compaction and soil wedge angle caused by soil subsidence, reducing soil resistance and saving fuel.

[0006] Further, the control valve group is provided with a quick deflation port and a slow deflation port. The control valve group is provided with a pressure sensor.

[0007] The beneficial effect of the further technical scheme is that the control valve group is provided with a pressure sensor, which can monitor the tire pressure.

[0008] Further, the front axle is provided with a front axle seal, and the rear axle is provided with a rear axle seal; the plurality of wheel edge valves are connected to the plurality of tires through air valves.

[0009] The beneficial effect of the further technical scheme is that the air pressure sealing device (the front axle seal and the rear axle seal) is built in the front axle and the rear axle, so that it is more neat and beautiful.

[0010] Further, the front axle and the rear axle are provided with a gas input interface and a gas output interface, the control valve group is connected to the gas input interface, and the gas output interface rotates with the tire.

[0011] The beneficial effect of the further technical scheme is that the front axle seal and the rear axle seal are built in the front axle and the rear axle, the gas input interface of the front axle and the rear axle is fixed, and the gas output interface rotates with the tire, so as to play the role of gas sealing and air passage, and the front axle and the rear axle are provided with transmission oil, and the front axle seal and the rear axle seal can isolate the air path and the transmission oil.

[0012] Further, the control valve group is connected to a controller, and the pair of load sensors are connected to the controller; and the controller is connected to a display.

[0013] The beneficial effect of the further technical scheme is that when the controller receives the control demand of the display, the gas in the gas source is distributed, transmitted to the wheel edge valve group through sealing, and adjusted in pressure through the wheel edge valve group.

[0014] In addition, the utility model still provides a kind of harvester, including the agricultural inflation and deflation system of any one described above with load sensor.

[0015] The beneficial effects of adopting the technical solution of this utility model are as follows: load sensors monitor changes in the load on the front and rear axles, thereby adjusting the tire pressure to adapt to field operations. This improves the driving stability and operating efficiency of agricultural harvesters, reduces tire wear, and reduces soil compaction. This is particularly suitable for situations where the load on harvester tires changes periodically. When the load increases, the tire pressure is increased, thereby increasing the tire load, reducing tire flexural deformation, and reducing internal heat generation. When the load on the entire vehicle decreases, the tire pressure can be appropriately reduced, thereby increasing the contact area between the tire and the soil, thereby reducing soil compaction and the soil wedge angle caused by soil subsidence, thereby reducing soil resistance and achieving the effect of saving fuel.

[0016] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an agricultural inflation and deflation system with a load sensor provided in an embodiment of the present utility model.

[0018] Figure 2 A schematic flow chart of an agricultural inflation and deflation method with a load sensor provided in an embodiment of the present utility model.

[0019] Explanation of the accompanying figures: 1. Load sensor; 2. Control valve group; 3. Air source; 4. Wheel-side valve; 5. Tire; 6. Quick air release port; 7. Slow air release port; 8. Front axle seal; 9. Rear axle seal; 10. Valve nozzle; 11. Controller; 12. Display. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, an embodiment of the utility model provides an agricultural inflation and deflation system with a load sensor, comprising: a pair of load sensors 1, a control valve group 2, an air source 3, multiple wheel-side valves 4, multiple tires 5, a front axle and a rear axle, wherein the pair of load sensors 1 are respectively installed on the front axle and the rear axle, the control valve group 2 is respectively connected to the air source 3 and the multiple wheel-side valves 4 through pipelines, the multiple wheel-side valves 4 are respectively connected to the multiple tires 5, and the multiple tires 5 are respectively installed on the front axle and the rear axle.

[0022] The beneficial effect of the technical scheme of the utility model is that the load sensor monitors the load change of the front and rear axles, so that the tire air pressure is adjusted to adapt to field operation, improve the driving stability and operation efficiency of the agricultural harvester, reduce tire wear, and compact soil.

[0023] Figure 1 The dashed line in the formula is signal transmission.

[0024] The utility model discloses an agricultural inflation and deflation system with load sensor, which can be a tire adjusting system with load sensor, improve the driving stability and operation efficiency of the agricultural harvester, reduce tire wear, and compact soil. When the controller receives the control demand of the display, the gas in the gas source is distributed, and the sealed transmission is given to the wheel edge valve group (wheel edge valve), and the air pressure is adjusted through the wheel edge valve group. The air pressure sealing device (front axle sealing and rear axle sealing) is built in the front and rear axles, so that it is more neat and beautiful. The load sensor monitors the load change of the front and rear axles, so that the tire air pressure is adjusted to adapt to field operation.

[0025] The utility model discloses a gas source, control valve group, controller, display, front axle sealing, rear axle sealing, wheel edge valve, tire, air cock, load sensor etc. The control valve group is built in pressure sensor, can monitor tire pressure. On the control valve group, there is a quick deflation port, and there is also a slow deflation port. The front axle sealing and rear axle sealing are built in the front and rear axles, and the front and rear axle gas input interfaces are fixed, and the gas output interfaces rotate with the tires, so that the gas sealing and air passage are realized, and transmission oil exists in the front and rear axles, and the front axle sealing and rear axle sealing can isolate the gas circuit and transmission oil. The wheel edge valve has the control gas on-off effect.

[0026] As shown in Figure 1 Further, the control valve group 2 is provided with a quick deflation port 6 and a slow deflation port 7, and the control valve group 2 is built in a pressure sensor.

[0027] The beneficial effect of the above further technical scheme is that the control valve group is built in a pressure sensor, which can monitor tire pressure. The setting of the quick deflation port and the slow deflation port facilitates the inflation and deflation of the control valve group.

[0028] As shown in Figure 1As shown, further, the front axle is built with a front axle seal 8, and the rear axle is built with a rear axle seal 9; the multiple wheel side valves 4 are respectively connected to the multiple tires 5 through valve nozzles 10.

[0029] The beneficial effect of adopting the above-mentioned further technical solution is that the air pressure sealing device (front axle seal and rear axle seal) is built into the front and rear axles, thereby making it more neat and beautiful. There is transmission oil in the front and rear axles, and the front axle seal and rear axle seal can isolate the air path from the transmission oil.

[0030] like Figure 1 As shown, further, a gas input interface and a gas output interface are provided on the front axle and the rear axle, the control valve group 2 is connected to the gas input interface, and the gas output interface rotates with the tire 5.

[0031] The beneficial effects of adopting the above-mentioned further technical solution are: the front axle seal and the rear axle seal are built into the front and rear axles, the gas input interfaces of the front and rear axles are fixed, and the gas output interfaces rotate with the tires, thereby playing the role of gas seal and airway, and there is transmission oil in the front and rear axles, and the front axle seal and the rear axle seal can isolate the air path from the transmission oil.

[0032] like Figure 1 As shown, further, the control valve group 2 is connected to a controller 11 , and a pair of load sensors 1 are both connected to the controller 11 ; the controller 11 is connected to a display 12 .

[0033] The beneficial effect of adopting this further technical solution is that when the controller receives a control request from the display, it distributes the gas in the air source and transmits it to the wheel-side valve group through a seal, and the wheel-side valve group adjusts the air pressure. The load sensors monitor the front and rear axle loads, and the controller calculates the front and rear axle loads to automatically adjust the tire pressure.

[0034] It should be noted that the control method of the controller is an existing technology, and those skilled in the art can easily figure out how to implement it through programming according to actual needs, which will not be elaborated here.

[0035] In addition, the utility model also provides a harvester, comprising any one of the above-mentioned agricultural inflation and deflation systems with a load sensor.

[0036] The beneficial effect of the technical scheme of the utility model is that the load sensor monitors the load change of the front and rear axles, thereby adjusting the tire air pressure to adapt to field operation, improves the driving stability and operation efficiency of the agricultural harvester, reduces tire wear and compaction of soil, is particularly suitable for the case of periodic load change of the harvester tire, when the load becomes large, the tire air pressure is increased, thereby improving the tire load bearing, reducing tire flexural deformation, reducing endogenous heat, when the whole vehicle load becomes small, the tire air pressure can be appropriately reduced, thereby increasing the tire ground contact area with soil, thereby reducing soil compaction and soil wedge angle generated by soil subsidence, thereby reducing soil resistance, and achieving the effect of saving fuel.

[0037] As shown in Figure 2 In addition, the utility model further provides an agricultural inflation and deflation method with a load sensor, based on the agricultural inflation and deflation system with a load sensor, the agricultural inflation and deflation method with a load sensor comprises the following steps: S1, when the harvester is harvesting, a pair of load sensors are used to respectively acquire the first load of the front axle and the first load of the rear axle; S2, according to the first load of the front axle and the first load of the rear axle, a first target air pressure is calculated; S3, the gas in the gas source is conducted to the multiple wheel edge valves through the control valve group, so that the multiple wheel edge valves are opened; S4, the multiple wheel edge valves respectively inflate the gas into the multiple tires, until the air pressure of the multiple tires reaches the first target air pressure; S5, when the harvester is unloading, a pair of load sensors are used to respectively acquire the second load of the front axle and the second load of the rear axle; S6, according to the second load of the front axle and the second load of the rear axle, a second target air pressure is calculated; S7, the gas in the gas source is conducted to the multiple wheel edge valves through the control valve group, so that the multiple wheel edge valves are opened; S8, the control valve group closes the gas source and opens the slow deflation port, until the air pressure of the multiple tires reaches the second target air pressure.

[0038] The beneficial effects of adopting the technical solution of the utility model are as follows: In the case of inflation, as the harvesting operation proceeds, the front and rear axle load sensors monitor the loads on the front and rear axles, and then transmit signals to the controller, indicating that the tires need to be inflated. The controller transmits an electrical signal to the control valve group, and the control valve group conducts the gas in the air source to the front axle seal and the rear axle seal. The air is transmitted to the wheel side valve through the front axle seal. At this time, the wheel side valve receives high air pressure, so that the air pressure wheel side valve opens, and the wheel side valve fills the tire with air through the air pipe and the valve nozzle. In the case of deflation, when the harvester's grain unloading device is operating, the loads on the front and rear axles are reduced, and the tires need to be deflated. The front and rear axle load sensors monitor the loads on the front and rear axles, and then transmit signals to the controller. The controller transmits an electrical signal to the control valve group, and at this time the control valve group will conduct the gas in the air source to the front axle seal and the rear axle seal. Pressure is transmitted through the front and rear axle seals to the wheel-side valves. The high pressure then flows through the wheel-side valves, opening them and connecting them to the control valve block. This closes the air supply and the airway between the control valve block, opening the slow bleed port. This port allows the wheel-side valves to release air from the tires without lowering the pressure in the line enough to close the valves. Load sensors monitor changes in front and rear axle loads and adjust tire pressure to suit field conditions. This improves the stability and efficiency of agricultural harvesters, reduces tire wear, and reduces soil compaction. This system is particularly well-suited for harvester tires subject to cyclical load fluctuations. When the load increases, the tire pressure is increased, increasing the load capacity, reducing tire deflection, and reducing internal heat generation. When the vehicle load decreases, the tire pressure can be appropriately reduced, increasing the tire contact area with the soil, reducing soil compaction and the wedge angle caused by soil subsidence, thereby reducing soil resistance and ultimately saving fuel.

[0039] Further, step S4 includes: S41, multiple wheel-side valves respectively inflate gas into multiple tires; S42, the control valve group monitors the actual tire pressure of multiple tires through pressure sensors; S43, when the actual tire pressure of multiple tires reaches the first target pressure, the control valve group closes the air source and opens the quick deflation port, so that the multiple wheel-side valves are closed, and the gas in the pipeline between the wheel-side valves and the control valve group is discharged; step S8 includes: S81, the control valve group monitors the actual tire pressure of multiple tires through pressure sensors; S82, when the actual tire pressure of multiple tires reaches the second target pressure, the control valve group closes the slow deflation port and opens the quick deflation port, so that the multiple wheel-side valves are closed, and the gas in the pipeline between the wheel-side valves and the control valve group is discharged.

[0040] The beneficial effects of the further technical scheme are as follows: during the inflation process, the control valve group monitors the tire pressure, and when the pressure reaches the target pressure, the control valve group cuts off the gas from the gas source and opens the fast deflation port, and the wheel valve is closed due to the decrease in pressure. The control valve group discharges the gas from the wheel valve to the control valve group section, thereby reducing the air pressure in the front and rear axle seals, and achieving the requirement of increasing the durability of the front and rear axle seals. The control valve group monitors the tire pressure, and when the pressure reaches the target pressure, the control valve group closes the slow deflation port and opens the fast deflation port, and the wheel valve is closed due to the decrease in pressure. The control valve group discharges the gas from the wheel valve to the control valve group section, thereby reducing the air pressure in the front and rear axle seals, and achieving the requirement of increasing the durability of the front and rear axle seals.

[0041] Further, step S2 includes: S21, obtaining the first load of the plurality of front axles and the first load of the plurality of rear axles in the first preset time period; S22, calculating the average of the first load of the front axles and the average of the first load of the rear axles according to the first load of the plurality of front axles and the first load of the plurality of rear axles in the first preset time period; S23, calculating the first target pressure according to the average of the first load of the front axles and the average of the first load of the front axles; step S6 includes: S61, obtaining the second load of the plurality of front axles and the second load of the plurality of rear axles in the second preset time period; S62, calculating the average of the second load of the front axles and the average of the second load of the rear axles according to the second load of the plurality of front axles and the second load of the plurality of rear axles in the second preset time period; S63, calculating the second target pressure according to the average of the second load of the front axles and the average of the second load of the rear axles.

[0042] The beneficial effects of the further technical scheme are as follows: to avoid the interference of unexpected situations such as large short-term changes in front and rear axle load caused by uneven road surface, the controller calculates the sensor signal in a period of time, then filters the abnormal signal, then calculates, and controls the tire pressure. Sometimes due to the influence of stones or uneven road surface, high load may appear for a short time, and then decrease to normal load. For such a controller, the short-term abnormal signal is filtered before calculation. The calculation is performed by weighted average of the load in a period of time. The pressure regulation is not always performed, and is generally performed once in a period of time. The stability and reliability of the agricultural automatic inflation and deflation system and method with load sensor are improved.

[0043] To avoid the interference of unexpected situations caused by uneven road surface, such as large changes in load bearing of front and rear axles, the controller will calculate the sensor signal (load sensor) in a period of time, then filter the abnormal signal, and then calculate and control the tire pressure. (Sometimes due to the influence of stones or uneven road surface, high load will appear for a short time, and then decrease to normal load. For such a controller, the short-term abnormal signal will be filtered before calculation. The weighted average method will be used to calculate according to the load in a period of time.) The pressure regulation is not always on, and is generally performed once in a period of time.

[0044] Further, it further comprises: S9, in the tire pressure maintaining state, the control valve group guides the gas in the gas source to the plurality of wheel edge valves, so that the plurality of wheel edge valves are opened; S10, the control valve group monitors the actual tire pressure of the plurality of tires through the pressure sensor; S11, when the harvester enters the road, the display obtains the third target pressure input by the user, and sends the third target pressure to the controller; S12, the controller controls the control valve group to guide the gas in the gas source to the plurality of wheel edge valves according to the third target pressure, so that the plurality of wheel edge valves are opened; S13, the plurality of wheel edge valves respectively fill the gas into the plurality of tires until the pressure of the plurality of tires reaches the third target pressure.

[0045] The beneficial effects of the above further technical solutions are: in the tire pressure maintaining state, the wheel edge valve remains closed, but because of the monitoring demand of the tire pressure, the control valve group will open at irregular times to introduce the gas in the gas source into the system, thereby opening the wheel edge valve, and the gas in the wheel edge valve is connected with the control valve group, so as to monitor the tire pressure. In the road condition, when the harvester enters the road, in order to reduce fuel consumption and tire wear, high pressure will be generally used, the driver controls the display to adjust the pressure, the display transmits the control signal to the controller, and the tire pressure adjustment process is the same as the inflation process.

[0046] In the following, four working conditions of inflation, deflation and tire pressure maintaining will be described.

[0047] Inflating condition, when the harvester is working, the front and rear axle load sensors monitor the front and rear axle load, then send signals to the controller, (load increase, to be inflated. The front and rear axle load has a corresponding relationship with the tire pressure, which will adopt a step value way, the greater the load, the higher the step pressure. Similar to a table, to what load, to what pressure. The tire needs to be inflated, the controller transmits an electrical signal to the control valve group, and the control valve group guides the gas in the gas source to the front and rear axle seals. Through the front axle seal to the wheel valve, at this time the wheel valve receives high pressure, so that the air pressure wheel valve opens, the wheel valve through the air pipe and the air door, the air is filled into the tire. During the inflation process, the control valve group will monitor the tire pressure, and when the pressure reaches the target pressure, the control valve group will cut off the gas from the gas source, and open the fast exhaust port, and the wheel valve will be closed due to the decrease in air pressure. The control valve group will discharge the gas from the wheel valve to the control valve group section, thereby reducing the air pressure in the front and rear axle seals, and achieving the requirement of increasing the durability of the front and rear axle seals.

[0048] Deflation condition, when the harvester unloading device is working, the front and rear axle load decreases, (load decrease, to be deflated. The load decreases to a level, the controller will decrease to the corresponding level of air pressure value.) The tire needs to be deflated, the front and rear axle load sensor monitors the front and rear axle load, then sends signals to the controller, the controller transmits an electrical signal to the control valve group, at this time the control valve group will guide the gas in the gas source to the front and rear axle seals. Through the front and rear axle seals to the wheel valve, at this time the wheel valve receives high pressure, so that the air pressure wheel valve opens, and the control valve group is connected, at this time the gas source and the air passage of the control valve group are closed, and the slow exhaust port is opened. The slow exhaust port can maintain the wheel valve to exhaust the gas in the tire, but the air pressure in the pipeline will not decrease to the closing of the wheel valve. The control valve group will monitor the tire pressure, and when the pressure reaches the target pressure, the control valve group will close the slow exhaust valve (slow exhaust port) and open the fast exhaust port, and the wheel valve will be closed due to the decrease in air pressure. The control valve group will discharge the gas from the wheel valve to the control valve group section, thereby reducing the air pressure in the front and rear axle seals, and achieving the requirement of increasing the durability of the front and rear axle seals.

[0049] Tire pressure maintaining condition, the wheel valve remains closed, but due to the monitoring requirement of the tire pressure, the control valve group will open from time to time to introduce the gas in the gas source into the system, thereby opening the wheel valve, and the wheel valve gas is connected with the control valve group, thereby monitoring the tire pressure.

[0050] Road condition, when the harvester enters the road, in order to reduce fuel consumption and reduce tire wear, high pressure is generally used, the driver controls the display to adjust the pressure, and the display transmits a control signal to the controller. The tire pressure adjustment process is the same as the inflation process.

[0051] 1. The utility model discloses a load sensor monitoring front and rear axle load, through the controller calculation front and rear axle load to carry out the automatic regulation of tire air pressure.2. The utility model discloses can carry out the control of the mode such as inflation, deflation, tire pressure monitoring.3. Adopt sealed built-in, thereby pipeline arrangement is more beautiful.

[0052] The utility model discloses an agricultural inflation and deflation system with load sensor can be a new type of agricultural tire inflation and deflation system with sensor, has tire inflation, deflation, tire pressure maintaining, road transportation and other modes, through sealed built-in, thereby make pipeline arrangement more beautiful. Especially suitable for the situation of harvester tire periodic load change, when the load becomes big, improve tire air pressure, thereby promote tire load, reduce tire deflection deformation, reduce endogenous heat. When the whole vehicle load becomes small, can appropriately reduce tire air pressure, thereby increase tire and soil contact area, thereby reduce soil compaction and reduce the soil wedge angle produced by soil subsidence, thereby reduce soil resistance, reach the effect of saving fuel.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not limited to it; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the utility model embodiments.

Claims

1. An agricultural inflation and deflation system with load sensor, characterized in that, The agricultural air inflation and deflation system with load sensors comprises a pair of load sensors, a control valve group, an air source, a plurality of wheel edge valves, a plurality of tires, a front axle and a rear axle, the pair of load sensors are respectively installed on the front axle and the rear axle, the control valve group is connected with the air source and the plurality of wheel edge valves through pipelines, the plurality of wheel edge valves are respectively connected with the plurality of tires, and the plurality of tires are respectively installed on the front axle and the rear axle. The control valve group is provided with a quick deflation port and a slow deflation port, and the control valve group is internally provided with a pressure sensor.

2. An agricultural inflation and deflation system with load sensor according to claim 1, characterized in that, The front axle is internally provided with a front axle seal, the rear axle is internally provided with a rear axle seal, and the plurality of wheel edge valves are respectively connected with the plurality of tires through air valves.

3. An agricultural inflation and deflation system with load sensor according to claim 1, characterized in that, The front axle and the rear axle are both provided with a gas input interface and a gas output interface, the control valve group is connected with the gas input interface, and the gas output interface rotates with the tire.

4. An agricultural inflation and deflation system with load sensor according to claim 1, characterized in that, The control valve group is connected with a controller, and the pair of load sensors are both connected with the controller; and the controller is connected with a display.

5. An agricultural inflation and deflation system with load sensor according to claim 1, characterized in that, The agricultural air inflation and deflation system with load sensors comprises a pair of load sensors, a control valve group, an air source, a plurality of wheel edge valves, a plurality of tires, a front axle and a rear axle, the pair of load sensors are respectively installed on the front axle and the rear axle, the control valve group is connected with the air source and the plurality of wheel edge valves through pipelines, the plurality of wheel edge valves are respectively connected with the plurality of tires, and the plurality of tires are respectively installed on the front axle and the rear axle.

6. A harvester characterized by ​

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