Integrated hydraulic valve block of self-propelled mower and flattener and control method thereof

Abstract

The application belongs to the technical field of agricultural machinery equipment, and particularly relates to an integrated hydraulic valve block of a self-propelled mowing and flattening machine and a control method thereof, which comprises a system pressure regulating and accessory system, a header lifting regulating system, a parking brake system, a header floating regulating system, a header angle regulating system and a flattening roller pressure regulating system; the system pressure regulating and accessory system comprises a system pressure sensor, a gear pump, a hydraulic oil tank and a system pressure proportional valve. The application dynamically adjusts the system pressure and flow by adopting multiple proportional valves, thereby not only improving the integration and reliability of the hydraulic system, but also realizing accurate control of each executing component of the self-propelled mowing and flattening machine, the hydraulic valve block can meet the working pressure and speed requirements of different executing components, and the working efficiency and accuracy are improved; and the system pressure is dynamically adjusted to realize accurate control of energy consumption, thereby improving the energy utilization efficiency of the whole system.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery and equipment technology, specifically relating to an integrated hydraulic valve block and its control method for a self-propelled mower and flattener. Background Technology

[0002] Self-propelled mowers and balers are forage harvesting machines widely used in harvesting and drying crops such as alfalfa and oats. The hydraulic system of a self-propelled mower and baler is responsible for the movement and execution of almost all moving parts, including the control of the cutter head lifting cylinder, cutter head floating cylinder, cutter head angle cylinder, baler roller cylinder, and parking brake. Because the working pressure and speed requirements of each component vary, the hydraulic valve blocks of existing self-propelled mowers and balers mainly consist of switching valves, which have low integration and insufficient adjustment precision, failing to meet the needs of efficient and precise control.

[0003] Chinese invention patent application number 202210424756.3 discloses a hydraulic system and hydraulic control method for a self-propelled lawn mower flattener. The system includes an integrated hydraulic valve block, a cutter head lifting cylinder, a cutter head tilting cylinder, multiple flattening roller gap adjustment cylinders, and a pair of floating cylinders. All four cylinders are connected to the integrated hydraulic valve block via piping. By integrating multiple sets of hydraulic control valves into the integrated hydraulic valve block, and controlling the cutter head lifting cylinder, cutter head tilting cylinder, multiple flattening roller gap adjustment cylinders, and the pair of floating cylinders, the system facilitates operation, simplifies piping structure, reduces hydraulic lines, increases integration, and facilitates the installation and maintenance of the hydraulic valve block. However, the pressure regulation in this application is accomplished by a proportional pressure reducing valve, which can only function for two sets of functions: left and right floating and flattening roller pressure adjustment, and its control stroke is limited. The lifting mechanism and the solenoid valve for maintaining the height of the cutting platform in this application are both on / off valves, which cannot accurately adjust the system pressure and flow rate when the cutting platform is lifted and lowered, and therefore cannot adjust the lifting and lowering speed. Furthermore, since the cutting platform weighs about one ton during the lowering process, an anti-fall circuit needs to be set in the hydraulic system. However, this application does not have an anti-fall circuit, which increases the safety hazards. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated hydraulic valve block and its control method for a self-propelled lawn mower and flattener, so as to improve the integration and reliability of the hydraulic system and achieve precise control of each actuator of the self-propelled lawn mower and flattener.

[0005] The objective of this invention can be achieved using the following technical solutions:

[0006] An integrated hydraulic valve block for a self-propelled mower ballast includes a system pressure regulation and accessory system, a cutter head lifting and adjustment system, a parking brake system, a cutter head floating adjustment system, a cutter head angle adjustment system, and a ballast roller pressure adjustment system. The system pressure regulation and accessory system includes: a system pressure sensor, a gear pump, a hydraulic oil tank, and a system pressure proportional valve. The cutter head lifting and adjustment system includes: a cutter head holding proportional valve, a cutter head safety valve, a cutter head check valve, a cutter head damping orifice, a cutter head quick-descent valve, a cutter head lifting proportional valve, and a cutter head lifting cylinder. The parking brake system includes a brake release valve, a brake release valve, a parking brake, a parking brake pressure switch, and a parking brake control valve. The system includes a vehicle brake accumulator and a parking brake accumulator control valve; the header floating adjustment system includes a right header floating pressure valve, a right header floating pressure valve, a left header floating pressure valve, a left header floating pressure valve, a left header floating pressure sensor, a left header floating cylinder, a left header floating accumulator, a right header floating accumulator, a right header floating cylinder, and a right header floating pressure sensor; the header angle adjustment system includes a header angle cylinder telescopic valve, a header angle cylinder hydraulic lock, a header angle cylinder damping orifice, and a header angle cylinder; the flattening roller pressure adjustment system includes a flattening roller pressure valve, a flattening roller pressure valve, a flattening roller accumulator, a flattening roller cylinder, and a flattening roller pressure sensor.

[0007] The gear pump of the system pressure regulation and accessory system is simultaneously connected to the system pressure sensor, the second end of the header lifting proportional valve, the second end of the header fast descent valve, the first end of the opening brake valve, the first end of the right floating pressure valve of the header, the first end of the left floating pressure valve of the header, the second end of the header angle cylinder telescopic valve, the first end of the flattening roller pressure valve, and the first end of the system pressure proportional valve.

[0008] The hydraulic oil tank is simultaneously connected to the first end of the cutting table lifting proportional valve, the second end of the cutting table damping hole, the second end of the opening brake valve, the second end of the cutting table right floating pressure valve, the second end of the cutting table left floating pressure valve, the first end of the cutting table angle cylinder telescopic valve, the second end of the flattening roller pressure valve, and the second end of the system pressure proportional valve.

[0009] The lifting proportional valve of the cutting platform adjustment system is a two-position three-way proportional valve. The second end of the lifting proportional valve is connected to the gear pump, and the first end of the lifting proportional valve is connected to the hydraulic oil tank. The holding proportional valve is a two-position two-way proportional valve. The cutting platform safety valve and the holding proportional valve are connected in parallel. The first end of the holding proportional valve is simultaneously connected to the first end of the control cutting platform safety valve and the third end of the lifting proportional valve. The rod chamber of the cutting platform lifting cylinder is simultaneously connected to the second end of the holding proportional valve and the second end of the cutting platform safety valve.

[0010] The header check valve is a hydraulically controlled check valve. The first end of the header check valve is connected to the rodless chamber of the header lifting cylinder. The hydraulically controlled end of the header check valve is also connected to the third end of the header lifting proportional valve, the first end of the header holding proportional valve, and the first end of the header safety valve. The first end of the header damping orifice is connected to the second end of the header check valve, and the second end of the header damping orifice is connected to the hydraulic oil tank. The header quick-descent valve is a two-position two-way directional valve. The first end of the header quick-descent valve is connected to the first end of the header check valve and the rodless chamber of the header lifting cylinder. The second end of the header quick-descent valve is connected to the gear pump and the system pressure sensor.

[0011] The parking brake system's opening brake valve is a two-position three-way directional valve, with its first end connected to the gear pump and its second end connected to the hydraulic oil tank. The deactivation brake valve is a two-position two-way directional valve, with its first end connected to the third end of the opening brake valve. The parking brake pressure switch is connected to the second end of the deactivation brake valve. The parking brake accumulator control valve is a two-position two-way directional valve, with its first end simultaneously connected to the parking brake, the parking brake pressure switch, and the second end of the deactivation brake valve. The parking brake accumulator is connected to the second end of the parking brake accumulator control valve.

[0012] The right floating pressure valve of the header floating adjustment system is a two-position three-way directional valve. The first end of the right floating pressure valve is connected to the gear pump, and the second end is connected to the hydraulic oil tank. The right floating pressure reducing valve is a two-position two-way directional valve. The first end of the right floating pressure reducing valve is connected to the third end of the right floating pressure valve, and the second end is simultaneously connected to the right floating pressure sensor, the right floating accumulator, and the rodless mechanism of the right floating cylinder. The two ends of the left floating pressure valve of the cutting platform are connected to the gear pump, and the second end of the left floating pressure valve of the cutting platform is connected to the hydraulic oil tank. The left floating pressure reducing valve of the cutting platform is a two-position two-way directional valve, and the first end of the left floating pressure reducing valve of the cutting platform is connected to the third end of the left floating pressure valve of the cutting platform. The second end of the left floating pressure reducing valve of the cutting platform is simultaneously connected to the left floating pressure sensor of the cutting platform, the left floating accumulator of the cutting platform, and the rodless chamber of the left floating cylinder of the cutting platform.

[0013] The cutting platform angle adjustment system's cutting platform angle cylinder telescopic valve is a three-position four-way reversing valve. The first end of the cutting platform angle cylinder telescopic valve is connected to the hydraulic oil tank, and the second end is connected to the gear pump. The first end of the cutting platform angle cylinder hydraulic lock is connected to the fourth end of the cutting platform angle cylinder telescopic valve, and the second end of the cutting platform angle cylinder hydraulic lock is connected to the third end of the cutting platform angle cylinder telescopic valve. The first end of the cutting platform angle cylinder damping orifice is connected to the third end of the cutting platform angle cylinder hydraulic lock. The rod-side chamber of the cutting platform angle cylinder is connected to the fourth end of the cutting platform angle cylinder hydraulic lock, and the rodless chamber of the cutting platform angle cylinder is connected to the second end of the cutting platform angle cylinder damping orifice.

[0014] The flattening roller pressure regulating system uses a two-position three-way directional valve for the flattening roller pressure applying valve. The first end of the flattening roller pressure applying valve is connected to a gear pump, and the second end is connected to a hydraulic oil tank. The flattening roller pressure reducing valve is a two-position two-way directional valve. The first end of the flattening roller pressure reducing valve is connected to the third end of the flattening roller pressure applying valve, and the second end of the flattening roller pressure reducing valve is simultaneously connected to the flattening roller accumulator, the rodless chamber of the flattening roller cylinder, and the flattening roller pressure sensor.

[0015] The present invention also provides an integrated hydraulic valve block control method for a self-propelled mower and flattener, which includes: a cutter head lifting adjustment control method, a parking brake control method, a cutter head floating adjustment control method, a cutter head angle adjustment control method, and a flattening roller pressure adjustment control method.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By using multiple proportional valves to dynamically adjust the system pressure and flow, the present invention not only improves the integration and reliability of the hydraulic system, but also achieves precise control of each actuator of the self-propelled lawn mower and flattener. The hydraulic valve block can meet the working pressure and speed requirements of different actuators, improving work efficiency and accuracy. Furthermore, by dynamically adjusting the system pressure, precise control of energy consumption can be achieved. This dynamic adjustment mechanism can not only save power, but also effectively reduce oil consumption, thereby improving the energy utilization efficiency of the entire system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a flowchart of the cutting platform lifting and adjustment control method in this invention.

[0019] Figure 3 This is a flowchart of the parking brake control method in this invention.

[0020] Figure 4 This is a flowchart of the header floating adjustment control method of the present invention.

[0021] Figure 5 This is a flowchart of the cutting table angle adjustment and control method in this invention.

[0022] Figure 6 This is a flowchart of the flattening roller pressure adjustment and control method in this invention.

[0023] In the diagram: 1. Header holding proportional valve; 2. Header safety valve; 3. Header check valve; 4. Header damping orifice; 5. Header quick-descent valve; 6. Header lifting proportional valve; 7. Brake cancellation valve; 8. System pressure sensor; 9. Brake activation valve; 10. Gear pump; 11. Right floating pressure valve of the header; 12. Hydraulic oil tank; 13. Right floating pressure reducing valve of the header; 14. System pressure proportional valve; 15. Left floating pressure valve of the header; 16. Left floating pressure reducing valve of the header; 17. Header angle cylinder telescopic valve; 18. Header angle cylinder hydraulic lock; 19. Flattening roller pressure valve; 20. Flattening roller pressure reducing valve. 21. Flattening roller accumulator; 22. Flattening roller cylinder; 23. Flattening roller pressure sensor; 24. Cutting table angle cylinder damping orifice; 25. Cutting table angle cylinder; 26. Cutting table left floating pressure sensor; 27. Cutting table left floating cylinder; 28. Cutting table left floating accumulator; 29. ​​Cutting table right floating accumulator; 30. Cutting table right floating cylinder; 31. Cutting table right floating pressure sensor; 32. Parking brake; 33. Parking brake pressure switch; 34. Parking brake accumulator; 35. Parking brake accumulator control valve; 36. Cutting table lifting cylinder; I. ​​System pressure regulation and accessory system; II. Cutting table lifting adjustment system; III. Parking brake system; IV. Cutting table floating adjustment system; V. Cutting table angle adjustment system; VI. Flattening roller pressure adjustment system. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1As shown, an integrated hydraulic valve block for a self-propelled mower and flattener includes a system pressure regulation and accessory system I, a cutter head lifting and adjusting system II, a parking brake system III, a cutter head floating adjusting system IV, a cutter head angle adjusting system V, and a flattening roller pressing adjusting system VI. The system pressure regulation and accessory system I includes: a system pressure sensor 8, a gear pump 10, a hydraulic oil tank 12, and a system pressure proportional valve 14. The cutter head lifting and adjusting system II includes: a cutter head holding proportional valve 1, a cutter head safety valve 2, a cutter head check valve 3, a cutter head damping orifice 4, a cutter head quick-descent valve 5, a cutter head lifting proportional valve 6, and a cutter head lifting cylinder 36. The parking brake system III includes a brake release valve 7, a brake release valve 9, a parking brake 32, a parking brake pressure switch 33, and a parking brake accumulator 3. 4. Parking brake accumulator control valve 35; The header floating adjustment system IV includes a right header floating pressure valve 11, a right header floating pressure reducing valve 13, a left header floating pressure valve 15, a left header floating pressure reducing valve 16, a left header floating pressure sensor 26, a left header floating cylinder 27, a left header floating accumulator 28, a right header floating accumulator 29, a right header floating cylinder 30, and a right header floating pressure sensor 31; The header angle adjustment system V includes a header angle cylinder telescopic valve 17, a header angle cylinder hydraulic lock 18, a header angle cylinder damping hole 24, and a header angle cylinder 25; The flattening roller pressure adjustment system VI includes a flattening roller pressure valve 19, a flattening roller pressure reducing valve 20, a flattening roller accumulator 21, a flattening roller cylinder 22, and a flattening roller pressure sensor 23.

[0026] The gear pump 10 of the system pressure regulation and accessory system I is simultaneously connected to the system pressure sensor 8, the second end of the header lifting proportional valve 6, the second end of the header quick-descent valve 5, the first end of the opening brake valve 9, the first end of the right floating pressure valve 11 of the header, the first end of the left floating pressure valve 15 of the header, the second end of the header angle cylinder telescopic valve 17, the first end of the flattening roller pressure valve 19, and the first end of the system pressure proportional valve 14; the hydraulic oil tank 12 is simultaneously connected to the first end of the header lifting proportional valve 6, the second end of the header damping orifice 4, the second end of the opening brake valve 9, the second end of the right floating pressure valve 11 of the header, and the left floating pressure valve 15 of the header. The second end is connected to the first end of the cutting table angle cylinder telescopic valve 17, the second end of the flattening roller pressurizing valve 19, and the second end of the system pressure proportional valve 14; the beneficial effect of the system pressure regulation and accessory system I is that the first end of the system pressure proportional valve 14 is connected to the gear pump 10, and the second end of the system pressure proportional valve 14 is connected to the hydraulic oil tank 12. By adjusting the input current of the system pressure proportional valve 14, the pressure of the first end of the system pressure proportional valve 14, i.e., the system pressure of the integrated hydraulic valve block, can be adjusted; furthermore, the system pressure sensor 8 is connected to the first end of the system pressure proportional valve 14, so the system pressure of the integrated hydraulic valve block can be monitored by the system pressure sensor 8.

[0027] The lifting proportional valve 6 of the cutting platform lifting adjustment system II is a two-position three-way proportional valve. The second end of the lifting proportional valve 6 is connected to the gear pump 10, and the first end of the lifting proportional valve 6 is connected to the hydraulic oil tank 12. The cutting platform holding proportional valve 1 is a two-position two-way proportional valve. The cutting platform safety valve 2 is connected in parallel with the cutting platform holding proportional valve 1. The first end of the cutting platform holding proportional valve 1 is simultaneously connected to the first end of the control cutting platform safety valve 2 and the third end of the cutting platform lifting proportional valve 6. The rod chamber of the cutting platform lifting cylinder 36 is simultaneously connected to the second end of the cutting platform holding proportional valve 1 and the second end of the cutting platform safety valve 2. The cutting platform check valve 3 is a hydraulically controlled check valve. The first end of the cutter head check valve 3 is connected to the rodless chamber of the cutter head lifting cylinder 36. The hydraulic control end of the cutter head check valve 3 is simultaneously connected to the third end of the cutter head lifting proportional valve 6, the first end of the cutter head holding proportional valve 1, and the first end of the cutter head safety valve 2. The first end of the cutter head damping orifice 4 is connected to the second end of the cutter head check valve 3, and the second end of the cutter head damping orifice 4 is connected to the hydraulic oil tank 12. The cutter head quick-descent valve 5 is a two-position two-way directional valve. The first end of the cutter head quick-descent valve 5 is simultaneously connected to the first end of the cutter head check valve 3 and the rodless chamber of the cutter head lifting cylinder 36, and the second end of the cutter head quick-descent valve 5 is connected to the gear pump 10 and the system pressure sensor 8. The beneficial effect of the cutter head lifting adjustment system II is that, by adjusting the input current of the cutter head lifting proportional valve 6, a cutter head lifting pressure can be output at the third end of the cutter head lifting proportional valve 6 based on the system pressure of the integrated hydraulic valve block. The cutter head lifting pressure will not exceed the system pressure of the integrated hydraulic valve block. The cutter head holding proportional valve 1 has a built-in check valve in its de-energized state, allowing hydraulic oil to flow unidirectionally from the first end to the second end of the valve. When the valve is in the de-energized state, the cutter head lifting pressure is directly transmitted to the rod chamber of the cutter head lifting cylinder 36. This lifting pressure provides the lifting cylinder 36 with a lifting force. When the lifting force of the cylinder 36 exceeds its lifting resistance, the cutter head is lifted. When the cutting platform is raised, there is pressure at the hydraulic control end of the cutting platform check valve 3, and the cutting platform check valve 3 is bidirectionally open. The hydraulic oil in the rodless chamber of the cutting platform lifting cylinder 36 flows through the cutting platform check valve 3 and the cutting platform damping hole 4 back to the hydraulic oil tank 12. Furthermore, when the cutting platform needs to be lowered, the cutting platform holding proportional valve 1 is energized, and the hydraulic oil in the rod chamber of the cutting platform lifting cylinder 36 flows through the cutting platform holding proportional valve 1 and the cutting platform lifting proportional valve 6 back to the hydraulic oil tank 12. By adjusting the input current of the cutting platform holding proportional valve 1, the cross-sectional area of ​​the oil passage inside the cutting platform holding proportional valve 1 can be adjusted, thereby adjusting the lowering speed of the cutting platform.Under atmospheric pressure, the hydraulic oil in the hydraulic tank 12 flows sequentially through the cutter head damping hole 4 and the cutter head check valve 3 back to the rodless chamber of the cutter head lifting cylinder 36. The presence of the cutter head damping hole 4 also reduces the descent speed of the cutter head. Furthermore, when the cutter head needs to descend rapidly, the cutter head holding proportional valve 1 is energized, and the current of the cutter head lifting proportional valve 6 is opened to its maximum value, so that the cutter head lifting proportional valve 6 is fully energized, and the cutter head fast descent valve 5 is energized. At this time, the hydraulic oil in the rod chamber of the cutter head lifting cylinder 36 can quickly flow through the cutter head holding proportional valve 1 and the cutter head lifting proportional valve 6 back to the hydraulic tank 12. The hydraulic oil in the hydraulic tank 12 can flow through the cutter head fast descent valve 5 back to the rodless chamber of the cutter head lifting cylinder 36. At this time, the hydraulic oil movement resistance in the rod chamber and rodless chamber of the cutting platform lifting cylinder 36 is minimal, and the cutting platform can quickly descend to the lowest position. Furthermore, when the cutting platform is subjected to an abnormal external force that causes the cutting platform to descend, the pressure in the rod chamber of the cutting platform lifting cylinder 36 rises sharply. When the pressure in the rod chamber of the cutting platform lifting cylinder 36 exceeds the set pressure of the cutting platform safety valve 2, the pressure in the rod chamber of the cutting platform lifting cylinder 36 can be released to the hydraulic oil tank 12 through the cutting platform safety valve 2, the cutting platform lifting proportional valve 6, and the system pressure proportional valve 14 to protect the hydraulic system.

[0028] The parking brake system III has a two-position three-way directional valve 9 for opening the brake, with the first end connected to the gear pump 10 and the second end connected to the hydraulic oil tank 12. The parking brake release valve 7 is a two-position two-way directional valve, with the first end connected to the third end of the opening brake valve 9. The parking brake pressure switch 33 is connected to the second end of the release valve 7. The parking brake accumulator control valve 35 is a two-position two-way directional valve, with the first end connected to the parking brake 32, the parking brake pressure switch 33, and the second end of the release valve 7. The parking brake accumulator 34 is connected to the second end of the parking brake accumulator control valve 35. The beneficial effects of the parking brake system III are as follows: the parking brake accumulator control valve 35 needs to be continuously energized. When parking brake is required, the opening brake valve 9 is energized, and the system pressure of the integrated hydraulic valve block is sequentially transmitted to the parking brake 32 and the parking brake accumulator 34 through the opening brake valve 9 and the releasing brake valve 7. If the required pressure of the parking brake 32 is reached, the parking brake pressure switch 33 sends a signal. When parking brake needs to be released, the parking brake accumulator control valve 35 and the releasing brake valve 7 are energized, and the hydraulic oil of the parking brake 32 can flow back to the hydraulic oil tank 12 through the releasing brake valve 7 and the opening brake valve 9. When the vehicle is parked and the power is off, the parking brake accumulator control valve 35 is de-energized, the releasing brake valve 7 is de-energized, the pressure stored in the parking brake accumulator 34 is released and transmitted to the parking brake 32, realizing the power-off parking brake. Furthermore, parking brakes are generally divided into two types: pressure loss braking / pressure gain releasing braking and pressure gain braking / pressure loss releasing braking. The present invention relates to a control method for a parking brake that provides pressure-based braking and pressure-based brake cancellation.

[0029] The right floating pressure valve 11 of the header floating adjustment system IV is a two-position three-way directional valve. The first end of the right floating pressure valve 11 is connected to the gear pump 10, and the second end is connected to the hydraulic oil tank 12. The right floating pressure reducing valve 13 is a two-position two-way directional valve. The first end of the right floating pressure reducing valve 13 is connected to the third end of the right floating pressure valve 11, and the second end of the right floating pressure reducing valve 13 is simultaneously connected to the right floating pressure sensor 31, the right floating accumulator 29, and the right floating cylinder 30. The rod chambers are connected; the left floating pressure valve 15 of the cutting platform is a two-position three-way reversing valve, the first end of the left floating pressure valve 15 of the cutting platform is connected to the gear pump 10, and the second end of the left floating pressure valve 15 of the cutting platform is connected to the hydraulic oil tank 12; the left floating pressure reducing valve 16 of the cutting platform is a two-position two-way reversing valve, the first end of the left floating pressure reducing valve 16 of the cutting platform is connected to the third end of the left floating pressure valve 15 of the cutting platform, and the second end of the left floating pressure reducing valve 16 of the cutting platform is simultaneously connected to the left floating pressure sensor 26 of the cutting platform, the left floating accumulator 28 of the cutting platform, and the rodless chamber of the left floating cylinder 27 of the cutting platform. The beneficial effects of the aforementioned header floating adjustment system IV are as follows: When the left header floating cylinder 27 requires a higher floating pressure, the system pressure of the integrated hydraulic valve block is adjusted to reach the target pressure by adjusting the input current of the system pressure proportional valve 14. The left header floating pressure-boosting valve 15 is energized, and the system pressure of the integrated hydraulic valve block is sequentially transmitted through the left header floating pressure-boosting valve 15 and the left header floating pressure-reducing valve 16 to the left header floating pressure sensor 26, the left header floating cylinder 27, and the left header floating accumulator 28. When the left header floating cylinder 27 requires a lower floating pressure, the system pressure of the integrated hydraulic valve block is adjusted to reach the target pressure by adjusting the input current of the system pressure proportional valve 14. The left header floating pressure-boosting valve 15 and the left header floating pressure-reducing valve 16 are energized, and the pressure inside the left header floating cylinder 27 is sequentially reduced to the target pressure (the system pressure of the integrated hydraulic valve block) through the left header floating pressure-reducing valve 16 and the left header floating pressure-boosting valve 15. When the left floating cylinder 27 of the cutting platform needs to completely release its floating pressure, the left floating pressure reducing valve 16 is energized. The hydraulic oil in the left floating cylinder 27 is then released sequentially through the left floating pressure reducing valve 16 and the left floating pressure increasing valve 15 to the hydraulic oil tank 12, reducing the floating pressure of the left floating cylinder 27 to zero. Furthermore, the floating pressure control method for the right floating cylinder 30 of the cutting platform is the same as that for the left floating cylinder 27. Furthermore, according to the operator's requirements, the floating pressures of the right floating cylinder 30 and the left floating cylinder 27 can be controlled separately or together.

[0030] The cutting table angle adjustment system V's cutting table angle cylinder telescopic valve 17 is a three-position four-way reversing valve. The first end of the cutting table angle cylinder telescopic valve 17 is connected to the hydraulic oil tank 12, and the second end of the cutting table angle cylinder telescopic valve 17 is connected to the gear pump 10. The first end of the cutting table angle cylinder hydraulic lock 18 is connected to the fourth end of the cutting table angle cylinder telescopic valve 17, and the second end of the cutting table angle cylinder hydraulic lock 18 is connected to the third end of the cutting table angle cylinder telescopic valve 17. The first end of the cutting table angle cylinder damping hole 24 is connected to the third end of the cutting table angle cylinder hydraulic lock 18. The rod-side chamber of the cutting table angle cylinder 25 is connected to the fourth end of the cutting table angle cylinder hydraulic lock 18, and the rodless chamber of the cutting table angle cylinder 25 is connected to the second end of the cutting table angle cylinder damping hole 24. The beneficial effect of the cutting table angle adjustment system V is that when the cutting table angle cylinder 25 needs to extend, the cutting table angle cylinder extension valve 17 is energized and moves to the right position. The system hydraulic oil passes through the cutting table angle cylinder extension valve 17, the cutting table angle cylinder hydraulic lock 18, and the cutting table angle cylinder damping hole 24 in sequence to the rodless chamber of the cutting table angle cylinder 25. The hydraulic oil in the rod chamber of the cutting table angle cylinder 25 passes through the cutting table angle cylinder hydraulic lock 18 and the cutting table angle cylinder extension valve 17 in sequence to return to the hydraulic oil tank 12. When the cutting platform angle cylinder 25 needs to be shortened, the cutting platform angle cylinder extension valve 17 is energized and moves to the left position. The system hydraulic oil flows sequentially through the cutting platform angle cylinder extension valve 17 and the cutting platform angle cylinder hydraulic lock 18 to the rod chamber of the cutting platform angle cylinder 25. The hydraulic oil in the rodless chamber of the cutting platform angle cylinder 25 flows sequentially through the cutting platform angle cylinder damping hole 24, the cutting platform angle cylinder hydraulic lock 18, and the cutting platform angle cylinder extension valve 17 back to the hydraulic oil tank 12. Furthermore, the extension / shortening speed of the cutting platform angle cylinder 25 can be adjusted by regulating the system pressure of the integrated hydraulic valve block. When the cutting platform angle cylinder 25 extends, the cutting platform angle increases; when the cutting platform angle cylinder 25 shortens, the cutting platform angle decreases. Furthermore, the function of the cutting platform angle cylinder hydraulic lock is to lock the position of the cutting platform angle cylinder 25 after the cutting platform angle adjustment is completed. The cutting platform angle cylinder damping hole 24 can increase the cutting platform angle adjustment time, allowing the operator to operate more easily.

[0031] The flattening roller pressure regulating system VI has a flattening roller pressure valve 19, which is a two-position three-way reversing valve. The first end of the flattening roller pressure valve 19 is connected to the gear pump 10, and the second end is connected to the hydraulic oil tank 12. The flattening roller pressure reducing valve 20 is a two-position two-way reversing valve. The first end of the flattening roller pressure reducing valve 20 is connected to the third end of the flattening roller pressure valve 19, and the second end of the flattening roller pressure reducing valve 20 is simultaneously connected to the flattening roller accumulator 21, the rodless chamber of the flattening roller cylinder 22, and the flattening roller pressure sensor 23. The beneficial effects of the flattening roller pressure adjustment system VI are as follows: When the flattening roller cylinder 22 requires higher pressure, the system pressure of the integrated hydraulic valve block is adjusted to reach the target pressure by adjusting the input current of the system pressure proportional valve 14. The flattening roller pressurizing valve 19 is energized, and the system pressure of the integrated hydraulic valve block is transmitted sequentially through the flattening roller pressurizing valve 19 and the flattening roller depressurizing valve 20 to the flattening roller pressure sensor 23, the flattening roller cylinder 22, and the flattening roller accumulator 21. When the flattening roller cylinder 22 requires lower pressure, the system pressure of the integrated hydraulic valve block is adjusted to reach the target pressure by adjusting the input current of the system pressure proportional valve 14. The flattening roller pressurizing valve 19 and the flattening roller depressurizing valve 20 are energized, and the pressure inside the flattening roller cylinder 22 is reduced sequentially through the flattening roller depressurizing valve 20 and the flattening roller pressurizing valve 19 to the target pressure (the system pressure of the integrated hydraulic valve block). When the pressure of the flattening roller cylinder 22 needs to be completely released, the flattening roller pressure reducing valve 20 is energized, and the hydraulic oil in the flattening roller cylinder 22 is released to the hydraulic oil tank 12 through the flattening roller pressure reducing valve 20 and the flattening roller pressure increasing valve 19 in sequence, and the pressure of the flattening roller cylinder 22 is reduced to zero.

[0032] like Figure 2-6 As shown, the present invention also provides an integrated hydraulic valve block control method for a self-propelled mower and flattener, including: a cutter head lifting adjustment control method, a parking brake control method, a cutter head floating adjustment control method, a cutter head angle adjustment control method, and a flattening roller pressure adjustment control method.

[0033] like Figure 2 As shown, this invention discloses an integrated hydraulic valve block control method for a self-propelled lawn mower and flattener, wherein the cutter head lifting and adjusting control method includes the following steps:

[0034] S1: After the operator presses the cutter head lift button, the system pressure proportional valve 14 is energized, the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure, and the cutter head lift proportional valve 6 is energized, and the cutter head rises.

[0035] S2: After the operator determines that the cutting platform has reached the predetermined height, the operator releases the cutting platform raising button, the raising stops, and all valve blocks are de-energized;

[0036] S3: After the operator presses the cutter lowering button, the cutter holding proportional valve 1 is energized, and the cutter lowers by its own weight. After the operator judges that the cutter has reached the predetermined height, the operator releases the cutter lowering button, the descent stops, and all valve blocks are de-energized.

[0037] S4: After the operator presses the rapid descent button of the cutting platform, the proportional valve 1 of the cutting platform is energized, the rapid descent valve 5 of the cutting platform is energized, and after the cutting platform rapidly descends to the lowest position, all valve blocks are de-energized.

[0038] like Figure 3 As shown, this invention discloses an integrated hydraulic valve block control method for a self-propelled lawn mower and flattener, wherein the parking brake control method includes the following steps:

[0039] S1: First, the parking brake accumulator control valve 35 needs to be energized continuously. After the driver presses the parking button, the system pressure proportional valve 14 is energized. The system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure, and then the brake valve 9 is energized. After the parking brake pressure switch 33 detects that the pressure has reached the preset braking pressure, all valve blocks are de-energized, and parking is successful.

[0040] S2: After the driver presses the cancel parking button, the brake valve 7 is energized. The parking brake pressure switch 33 detects that the pressure is lower than the preset braking pressure, pauses for 2 seconds to wait for the braking pressure to be fully released, and all valve blocks are de-energized, thus successfully canceling the parking.

[0041] like Figure 4 As shown, this invention discloses an integrated hydraulic valve block control method for a self-propelled lawn mower and flattener, wherein the cutter head floating adjustment control method includes the following steps:

[0042] S1: After the driver issues the command to increase the floating pressure of the cutting platform, the system pressure proportional valve 14 is energized. The system pressure sensor 8 determines that after the system pressure of the integrated hydraulic valve block reaches the predetermined pressure, the driver needs to issue a command to increase the floating pressure of the left cutting platform, the floating pressure of the right cutting platform, or both floating pressures of the left and right cutting platforms are increased simultaneously.

[0043] S2: Taking the increase of left floating pressure of the cutting table as an example, the left floating pressure valve 15 of the cutting table is energized. After the left floating pressure sensor 26 of the cutting table determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the increase of left floating pressure is completed.

[0044] S3: After the driver issues the command to reduce the floating pressure of the cutting platform, the system pressure proportional valve 14 is energized. The system pressure sensor 8 determines that after the system pressure of the integrated hydraulic valve block reaches the predetermined pressure, the driver needs to issue a command to reduce the floating pressure of the left cutting platform, the floating pressure of the right cutting platform, or the floating pressure of both sides of the cutting platform at the same time.

[0045] S4: Taking the reduction of the left floating pressure of the cutting table as an example, the left floating pressure valve 15 and the left floating pressure reducing valve 16 of the cutting table are energized. After the left floating pressure sensor 26 of the cutting table determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the reduction of the left floating pressure is completed.

[0046] like Figure 5 As shown, this invention discloses an integrated hydraulic valve block control method for a self-propelled lawn mower and flattener, wherein the cutter angle adjustment control method includes the following steps:

[0047] S1: When the driver presses the cutter angle increase button, the system pressure proportional valve 14 is energized. The system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure. Then, the cutter angle cylinder extension valve 17 is energized, the cutter angle cylinder 25 extends, and the cutter angle increases.

[0048] S2: After the operator determines that the cutting platform angle has reached the predetermined angle, the operator releases the cutting platform raising button, the raising stops, and all valve blocks are de-energized;

[0049] S3: When the driver presses the cutter angle reduction button, the system pressure proportional valve 14 is energized. The system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure. Then, the cutter angle cylinder extension valve 17 is energized, the cutter angle cylinder 25 is shortened, and the cutter angle decreases.

[0050] S4: After the operator determines that the cutting platform angle has reached the predetermined angle, the operator releases the cutting platform descent button, the descent stops, and all valve blocks are de-energized.

[0051] like Figure 6 As shown, this invention discloses an integrated hydraulic valve block control method for a self-propelled lawn mower flattener, wherein the flattening roller pressure adjustment control method includes the following steps:

[0052] S1: After the driver issues the command to increase the pressure of the flattening roller, the system pressure proportional valve 14 is energized, the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure, the flattening roller pressurization valve 19 is energized, the flattening roller pressure sensor 23 determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the pressure increase of the flattening roller is completed.

[0053] S2: After the driver issues the command to reduce the pressure of the flattening roller, the system pressure proportional valve 14 is energized. After the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the predetermined pressure, the flattening roller pressurizing valve 19 and the flattening roller depressurizing valve 20 are energized. After the flattening roller pressure sensor 23 determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the pressure reduction of the flattening roller is completed.

[0054] This method utilizes multiple proportional valves in the integrated hydraulic valve block to dynamically adjust the system pressure, thereby achieving precise control of energy consumption. This dynamic adjustment mechanism not only saves power but also effectively reduces fuel consumption, thus improving the energy utilization efficiency of the entire system.

[0055] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated hydraulic valve block for a self-propelled lawn mower and flattener, characterized in that: The system includes a system pressure regulation and accessory system (Ⅰ), a header lifting and adjusting system (Ⅱ), a parking brake system (Ⅲ), a header floating adjusting system (Ⅳ), a header angle adjusting system (Ⅴ), and a flattening roller pressing adjusting system (Ⅵ); the system pressure regulation and accessory system (Ⅰ) includes: a system pressure sensor (8), a gear pump (10), a hydraulic oil tank (12), and a system pressure proportional valve (14); the header lifting and adjusting system (Ⅱ) includes: a header holding proportional valve (1), a header safety valve (2), a header check valve (3), a header damping orifice (4), a header quick-descent valve (5), a header lifting proportional valve (6), and a header lifting cylinder (36); the parking brake system (Ⅲ) includes a brake cancellation valve (7), a brake opening valve (9), a parking brake (32), a parking brake pressure switch (33), a parking brake accumulator (34), and a parking brake accumulator. Control valve (35); The header floating adjustment system (Ⅳ) includes a right header floating pressure valve (11), a right header floating pressure reducing valve (13), a left header floating pressure valve (15), a left header floating pressure reducing valve (16), a left header floating pressure sensor (26), a left header floating cylinder (27), a left header floating accumulator (28), a right header floating accumulator (29), a right header floating cylinder (30), and a right header floating pressure sensor (31); The header angle adjustment system (Ⅴ) includes a header angle cylinder telescopic valve (17), a header angle cylinder hydraulic lock (18), a header angle cylinder damping hole (24), and a header angle cylinder (25); The flattening roller pressure adjustment system (Ⅵ) includes a flattening roller pressure valve (19), a flattening roller pressure reducing valve (20), a flattening roller accumulator (21), a flattening roller cylinder (22), and a flattening roller pressure sensor (23); The gear pump (10) of the system pressure regulation and accessory system (Ⅰ) is simultaneously connected to the system pressure sensor (8), the second end of the cutting platform lifting proportional valve (6), the second end of the cutting platform fast descent valve (5), the first end of the opening brake valve (9), the first end of the cutting platform right floating pressure valve (11), the first end of the cutting platform left floating pressure valve (15), the second end of the cutting platform angle cylinder telescopic valve (17), the first end of the flattening roller pressure valve (19), and the first end of the system pressure proportional valve (14).

2. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The hydraulic oil tank (12) is simultaneously connected to the first end of the cutting table lifting proportional valve (6), the second end of the cutting table damping hole (4), the second end of the opening brake valve (9), the second end of the cutting table right floating pressure valve (11), the second end of the cutting table left floating pressure valve (15), the first end of the cutting table angle cylinder telescopic valve (17), the second end of the flattening roller pressure valve (19), and the second end of the system pressure proportional valve (14).

3. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The lifting proportional valve (6) of the lifting system (II) is a two-position three-way proportional valve. The second end of the lifting proportional valve (6) is connected to the gear pump (10), and the first end of the lifting proportional valve (6) is connected to the hydraulic oil tank (12). The holding proportional valve (1) is a two-position two-way proportional valve. The safety valve (2) of the lifting system (II) is connected in parallel with the holding proportional valve (1). The first end of the holding proportional valve (1) is connected to the first end of the safety valve (2) and the third end of the lifting proportional valve (6). The rod chamber of the lifting cylinder (36) of the lifting system is connected to the second end of the holding proportional valve (1) and the second end of the safety valve (2).

4. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The cutting platform check valve (3) is a hydraulically controlled check valve. The first end of the cutting platform check valve (3) is connected to the rodless chamber of the cutting platform lifting cylinder (36). The hydraulically controlled end of the cutting platform check valve (3) is simultaneously connected to the third end of the cutting platform lifting proportional valve (6), the first end of the cutting platform holding proportional valve (1), and the first end of the cutting platform safety valve (2). The first end of the cutting platform damping hole (4) is connected to the second end of the cutting platform check valve (3). The second end of the cutting platform damping hole (4) is connected to the hydraulic oil tank (12). The cutting platform quick-descent valve (5) is a two-position two-way reversing valve. The first end of the cutting platform quick-descent valve (5) is simultaneously connected to the first end of the cutting platform check valve (3) and the rodless chamber of the cutting platform lifting cylinder (36). The second end of the cutting platform quick-descent valve (5) is connected to the gear pump (10) and the system pressure sensor (8).

5. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The parking brake system (III) has an opening brake valve (9) that is a two-position three-way directional valve. The first end of the opening brake valve (9) is connected to the gear pump (10), and the second end of the opening brake valve (9) is connected to the hydraulic oil tank (12). The cancel brake valve (7) is a two-position two-way directional valve. The first end of the cancel brake valve (7) is connected to the third end of the opening brake valve (9). The parking brake pressure switch (33) is connected to the second end of the cancel brake valve (7). The parking brake accumulator control valve (35) is a two-position two-way directional valve. The first end of the parking brake accumulator control valve (35) is connected to the second end of the parking brake (32), the parking brake pressure switch (33), and the cancel brake valve (7). The parking brake accumulator (34) is connected to the second end of the parking brake accumulator control valve (35).

6. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The right floating pressure valve (11) of the cutting platform floating adjustment system (Ⅳ) is a two-position three-way directional valve. The first end of the right floating pressure valve (11) is connected to the gear pump (10), and the second end of the right floating pressure valve (11) is connected to the hydraulic oil tank (12). The right floating pressure reducing valve (13) is a two-position two-way directional valve. The first end of the right floating pressure reducing valve (13) is connected to the third end of the right floating pressure valve (11), and the second end of the right floating pressure reducing valve (13) is simultaneously connected to the right floating pressure sensor (31), the right floating accumulator (29), and the right floating cylinder (30). The rodless chamber is connected; the left floating pressure valve (15) of the cutting platform is a two-position three-way reversing valve. The first end of the left floating pressure valve (15) of the cutting platform is connected to the gear pump (10), and the second end of the left floating pressure valve (15) of the cutting platform is connected to the hydraulic oil tank (12); the left floating pressure reducing valve (16) of the cutting platform is a two-position two-way reversing valve. The first end of the left floating pressure reducing valve (16) of the cutting platform is connected to the third end of the left floating pressure valve (15) of the cutting platform, and the second end of the left floating pressure reducing valve (16) of the cutting platform is simultaneously connected to the rodless chamber of the left floating pressure sensor (26), the left floating accumulator (28), and the left floating cylinder (27).

7. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The cutting angle adjustment system (V) has a cutting angle cylinder telescopic valve (17) which is a three-position four-way reversing valve. The first end of the cutting angle cylinder telescopic valve (17) is connected to the hydraulic oil tank (12), and the second end of the cutting angle cylinder telescopic valve (17) is connected to the gear pump (10). The first end of the cutting angle cylinder hydraulic lock (18) is connected to the fourth end of the cutting angle cylinder telescopic valve (17), and the second end of the cutting angle cylinder hydraulic lock (18) is connected to the third end of the cutting angle cylinder telescopic valve (17). The first end of the cutting angle cylinder damping hole (24) is connected to the third end of the cutting angle cylinder hydraulic lock (18). The rod chamber of the cutting angle cylinder (25) is connected to the fourth end of the cutting angle cylinder hydraulic lock (18), and the rodless chamber of the cutting angle cylinder (25) is connected to the second end of the cutting angle cylinder damping hole (24).

8. The integrated hydraulic valve block of the self-propelled lawn mower and flattener according to claim 1, characterized in that: The flattening roller pressure regulating system (VI) has a flattening roller pressure valve (19) that is a two-position three-way reversing valve. The first end of the flattening roller pressure valve (19) is connected to the gear pump (10), and the second end of the flattening roller pressure valve (19) is connected to the hydraulic oil tank (12). The flattening roller pressure reducing valve (20) is a two-position two-way reversing valve. The first end of the flattening roller pressure reducing valve (20) is connected to the third end of the flattening roller pressure valve (19), and the second end of the flattening roller pressure reducing valve (20) is simultaneously connected to the flattening roller accumulator (21), the rodless chamber of the flattening roller cylinder (22), and the flattening roller pressure sensor (23).

9. An integrated hydraulic valve block control method for a self-propelled lawn mower and flattener according to any one of claims 1-8, characterized in that, The control system utilizes integrated hydraulic valve blocks, including: control methods for lifting and adjusting the cutter head, parking brake control, floating control of the cutter head, angle adjustment control of the cutter head, and pressure adjustment control of the flattening roller.

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