A tractor intelligent output interface

Abstract

The present invention relates to a tractor intelligent output interface, the left output of the diverter valve III is connected to two circuits in parallel, the first circuit is connected to the oil inlet of the overflow valve II, the oil outlet of the overflow valve II is connected to the cooler III, the oil outlet of the cooler III flows back to the oil tank, the second circuit is connected to the temperature sensor III, the pressure sensor III and the flow sensor III, the oil outlet of the second circuit is connected to the differential pressure reducing valve I, the oil outlet of the differential pressure reducing valve I is connected to the three-position four-way electromagnetic reversing valve II, the hydraulic control oil port of the differential pressure reducing valve I is respectively connected to the inlet and outlet oil circuits of the three-position four-way electromagnetic reversing valve II, the oil outlet of the three-position four-way electromagnetic reversing valve II is connected in parallel with the shuttle valve I, and the pressure compensation system is used in conjunction with the shuttle valve I, and the pressure compensation system ensures that the output flow of the three-position four-way electromagnetic reversing valve II is not affected by the load change and remains constant. The system flow does not change with the load change, and can be accurately adjusted through the control signal to improve the control accuracy of the system, providing technical support for precision agriculture.

Description

Technical Field

[0001] The invention relates to a tractor, in particular to an intelligent output interface of a tractor, and belongs to the technical field of tractors. Background Art

[0002] Tractors can provide traction power for most agricultural machinery. The output power interface of existing tractors has the following problems: 1) The hydraulic oil and gearbox oil are shared, the oil is contaminated and the system is seriously heated, which cannot meet the requirements of the hydraulic system, especially the proportional servo hydraulic components; 2) There are generally only two power output interfaces, which cannot meet the driving requirements of multiple working parts in complex operations. Existing agricultural machinery often has an additional hydraulic station for driving, which is complex in structure and high in cost. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent output interface for a tractor, which can drive loads of different types and different requirements and drive multiple actuators at the same time, so as to realize controllable and adjustable flow, speed, working pressure and movement direction; multiple hydraulic circuits are arranged by a pressure compensation mechanism, so that the system flow does not change with the load, and can be accurately adjusted through control signals, thereby improving the control accuracy of the system and providing technical support for precision agriculture.

[0004] The present invention adopts the following technical solutions:

[0005] A tractor intelligent output interface, the tractor hydraulic output outlet is connected to a flow sensor Ⅰ1, the tractor hydraulic output is integrated inside the tractor, and the engine drives the hydraulic pump as the power source of the hydraulic output; two circuits are connected in parallel at the outlet of the flow sensor Ⅰ1, the first circuit is connected to the oil inlet of a proportional relief valve 4, the proportional relief valve 4 changes the opening pressure according to the size of an external input electrical signal, the oil outlet of the proportional relief valve 4 is connected to a cooler Ⅰ3, and the oil outlet of the cooler Ⅰ3 flows back to the oil tank, and the second circuit is connected to a temperature sensor Ⅰ5 and a pressure sensor Ⅰ6, which are respectively used to measure the oil temperature and working pressure of the main circuit. The oil outlet of the second circuit is connected to the diverter valve Ⅰ7, and the left output of the diverter valve Ⅰ7 is connected to the filter Ⅰ8 with a display, which can display the blockage condition of the filter; the oil outlet of the filter Ⅰ7 is connected to the diverter valve Ⅱ9; the left output of the diverter valve Ⅱ9 is connected to two circuits in parallel, wherein the first circuit is connected to the oil inlet of the overflow valve Ⅰ11, and the oil outlet of the overflow valve Ⅰ11 is connected to the cooler Ⅱ10, and the oil outlet of the cooler Ⅱ10 flows back to the oil tank, and the second circuit is connected to the temperature sensor Ⅱ13, the pressure sensor Ⅱ14 and the flow sensor Ⅱ12, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The oil outlet of each circuit is connected to a three-position four-way solenoid reversing valve Ⅰ15, which has an M-type mid-position function and can lock the actuator Ⅰ16; the right output of the diverter valve Ⅱ9 is connected to a diverter valve Ⅲ26; the left output of the diverter valve Ⅲ26 is connected to two circuits in parallel, the first circuit is connected to the oil inlet of the overflow valve Ⅱ18, the oil outlet of the overflow valve Ⅱ18 is connected to the cooler Ⅲ17, the oil outlet of the cooler Ⅲ17 flows back to the oil tank, and the second circuit is connected to the temperature sensor Ⅲ20, the pressure sensor Ⅲ21 and the flow sensor Ⅲ19, which are respectively used to measure the oil temperature of the circuit , working pressure and flow, the oil outlet of the second circuit is connected to the differential pressure reducing valve Ⅰ22, the oil outlet of the differential pressure reducing valve Ⅰ22 is connected to the three-position four-way solenoid reversing valve Ⅱ23, the hydraulic control oil port of the differential pressure reducing valve Ⅰ22 is respectively connected to the inlet and outlet oil circuits of the three-position four-way solenoid reversing valve Ⅱ23, the oil outlet of the three-position four-way solenoid reversing valve Ⅱ23 is connected in parallel with the shuttle valve Ⅰ24, and the pressure compensation system is formed in conjunction with the shuttle valve Ⅰ24. The pressure compensation system can ensure that the output flow of the three-position four-way solenoid reversing valve Ⅱ23 is not affected by load changes and remains constant; the oil outlet of the three-position four-way solenoid reversing valve Ⅱ23 is connected to the actuator Ⅱ25;The right output of the diverter valve III 26 is connected with a single-phase stable diverter valve 28, which can be used to ensure that the flow rate of one hydraulic oil output is stable and unchanged, and the other hydraulic oil changes with the change of the oil at the oil inlet. The oil outlet of the stable output of the single-phase stable diverter valve 28 is connected to two circuits in parallel, the first one is connected to the overflow valve III 27, the oil outlet of the overflow valve III 27 flows back to the oil tank, the second one is connected to the temperature sensor IV 31, the pressure sensor IV 32 and the flow sensor IV 33, which are respectively used to measure the oil temperature, working pressure and flow of the circuit, and the second oil outlet is connected to the differential pressure reducing valve II 34. The oil outlet of differential pressure reducing valve II 34 is connected to variable throttle valve 35, and differential pressure reducing valve II 34 is used to ensure that the inlet and outlet pressure difference of variable throttle valve remains unchanged; the non-stable output port of single-phase stable diverter valve 28 is connected to two hydraulic circuits in parallel, the first circuit is connected to the oil inlet of overflow valve IV 29, and the second circuit is connected to temperature sensor V 39, pressure sensor V 40 and flow sensor V 38, which are respectively used to measure the oil temperature, working pressure and flow of the circuit, and the second oil outlet is connected to three-position four-way electromagnetic reversing valve III 41, which is an O-type middle position function. When the middle position is connected to the system, it can be used to lock the actuator IV 42; the right output of diverter valve I 7 A filter II43 with a display is connected, and the filter II43 can display the blockage condition. Since the control element of this circuit uses a proportional valve, its filtering accuracy is relatively high to ensure the service life of the element. The oil outlet of the filter II43 is connected to the diverter valve IV44. The left output of the diverter valve IV44 is connected to two circuits in parallel. The first circuit is connected to the overflow valve V46. The oil outlet of the overflow valve V46 is connected to the cooler VI45. The hot oil of the cooler VI45 flows back to the oil tank. The second circuit is connected to the temperature sensor VI47, the pressure sensor VI48 and the flow sensor VI49, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The second oil outlet is connected to the differential pressure reducing valve III50, and the oil outlet of the differential pressure reducing valve III50 is connected to the three-position four-way proportional reversing valve 51. The hydraulic control oil port of the differential pressure reducing valve III50 is respectively connected to the inlet and outlet oil circuits of the three-position four-way proportional reversing valve. The oil outlet of the three-position four-way proportional reversing valve 51 is connected in parallel with a shuttle valve II52, which is used in conjunction with the shuttle valve II52 to form a pressure compensation system. The pressure compensation system can ensure that the output flow of the three-position four-way proportional reversing valve 51 is only related to the throttle opening of the valve itself. The throttle opening of the three-position four-way proportional reversing valve is controlled by an input signal and can be infinitely adjustable between 0 opening and the maximum opening.The right output of the diverter valve IV44 is connected to the diverter valve V54, and the left output of the diverter valve V is connected to two circuits in parallel, the first circuit is connected to the relief valve VI55, the oil outlet of the relief valve 6 is connected to the cooler VII56, and the second circuit is connected to the temperature sensor VII57, the pressure sensor VII58 and the flow sensor VII59, which are respectively used to measure the oil temperature, working pressure and flow of the circuit, and the second oil outlet is connected to the proportional pressure reducing valve 60, the outlet pressure of the proportional pressure reducing valve is controlled by the input signal, the oil outlet of the proportional pressure reducing valve is connected to the actuator VI61, and the oil return port of the actuator VI61 flows back to the oil tank; the right output of the diverter valve V54 is connected to two circuits in parallel, the first circuit is connected to the relief valve VIII62, and the relief valve VIII is a manual type , its opening pressure can be adjusted manually, the oil outlet of the overflow valve VIII is connected to the cooler VIII 63, the second way is connected to the temperature sensor VIII 64, the pressure sensor VIII 65 and the flow sensor VIII 66, which are used to measure the oil temperature, working pressure and flow of the circuit respectively, the second way oil outlet is the differential pressure reducing valve IV 67, the oil outlet of the differential pressure reducing valve IV 67 is connected to the proportional throttle valve 68, the differential pressure reducing valve IV 67 is used to ensure that the inlet and outlet pressure difference of the proportional throttle valve remains unchanged, and then the flow through the proportional throttle valve is only related to its throttle opening and has nothing to do with the load of the actuator VII 69, and the throttle of the proportional throttle valve is infinitely adjusted according to the input signal; the output oil port of the proportional throttle valve is connected to the actuator VII, and the oil return port of the actuator VII flows back to the oil tank. ;

[0006] Preferably, the diverter valve I7, diverter valve II9, diverter valve III26, diverter valve IV44, and diverter valve V54 are manual, and the diverter ratio can be adjusted manually;

[0007] Preferably, overflow valve I11, overflow valve II18, overflow valve III27, overflow valve IV29, overflow valve V46, overflow valve VI55, and overflow valve VII62 are all manual types, and their opening pressures can be adjusted manually; the variable throttle valve can manually change its throttle opening, and the oil outlet of the variable throttle valve is connected to the actuator III36, the oil outlet of the actuator III36 is connected to the cooler V37, and the oil outlet of the cooler V37 flows back to the oil tank.

[0008] Preferably, the actuator III 36 is a single-acting hydraulic cylinder or a unidirectional hydraulic motor; the actuator I is a double-acting hydraulic cylinder or a bidirectional hydraulic motor; and the actuator II is a double-acting hydraulic cylinder or a bidirectional hydraulic motor.

[0009] Preferably, the oil outlet of the overflow valve IV29 is connected to the cooler IV30, and the hot oil flows back to the oil tank through the cooler IV30.

[0010] Preferably, the actuator IV 42 is a double-acting hydraulic cylinder or a bidirectional hydraulic motor; the actuator V is a double-acting hydraulic cylinder or a bidirectional hydraulic motor; the actuator VI is a single-acting hydraulic cylinder or a unidirectional hydraulic motor; the actuator VI is a single-acting hydraulic cylinder or a unidirectional hydraulic motor.

[0011] The beneficial effects of the present invention are:

[0012] 1) It can drive up to 7 actuators at the same time, providing equipment support for agricultural modernization complex operations and meeting the driving needs of multiple working parts in complex operations.

[0013] 2) In response to the driving requirements of agricultural machinery and equipment, a variety of power interfaces have been designed to adapt to different types of agricultural machinery and equipment with different needs, and the flow, speed, working pressure and movement direction can be controlled and adjusted.

[0014] 3) Multiple hydraulic circuits are equipped with pressure compensation mechanisms, which ensure that the system flow does not change with load changes. It can be accurately adjusted through control signals, improving the control accuracy of the system and providing technical support for precision agriculture.

[0015] 4) Taking into account the problems of high heat generation and poor heat dissipation in the tractor hydraulic system, multiple cooling valve groups (coolers) are set up to effectively ensure the stability of the hydraulic system oil temperature and provide technical support for the reliable operation of the hydraulic system.

[0016] 5) Filters with different precisions are set for different types of hydraulic components, which solves the problem of reduced service life of hydraulic components caused by oil contamination in existing tractors.

[0017] 6) The problem of sharing hydraulic oil with gearbox oil, oil contamination and serious system heating, which cannot meet the requirements of hydraulic system, especially proportional servo hydraulic components, is solved.

[0018] 7) No additional hydraulic station is required for driving, which simplifies the structure and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the hydraulic system diagram of the tractor intelligent output interface.

[0020] In the figure, 1-flow sensor Ⅰ 2-oil tank 3-cooler Ⅰ 4-proportional relief valve 5-temperature sensor Ⅰ 6-pressure sensor Ⅰ 7-diverter valve Ⅰ 8-filter with display Ⅰ 9-diverter valve 2 10-cooler Ⅱ 11-relief valve Ⅰ 12-flow sensor Ⅱ 13-temperature sensor Ⅱ 14-pressure sensor Ⅱ 15-three-position four-way solenoid reversing valve Ⅰ 16-actuator Ⅰ 17-cooler Ⅲ 18-relief valve Ⅱ 19-flow sensor Ⅲ 20-temperature sensor Ⅲ 21-pressure sensor Ⅲ 22-differential pressure reducing valve Ⅰ 23-three-position four-way solenoid reversing valve Ⅱ 24-shuttle valve Ⅰ 25-actuator Ⅱ 26-diverter valve Ⅲ 27-relief valve Ⅲ 28-single-way stable diverter valve 29-relief valve Ⅳ 30-cooler Ⅳ 31-temperature sensor Ⅳ 32-pressure sensor Ⅳ 33-flow sensor Ⅳ 34-Differential pressure reducing valve Ⅱ 35-Variable throttle valve 36-Actuator Ⅲ 37-Cooler Ⅴ 38-Flow sensor Ⅴ 39-Temperature sensor Ⅴ 40-Pressure sensor Ⅴ 41-Three-position four-way solenoid reversing valve Ⅲ 42-Actuator Ⅳ 43-Filter with display Ⅱ 44-Diverter valve Ⅳ 45-Cooler Ⅵ 46-Relief valve Ⅴ 47-Temperature sensor Ⅵ48-Pressure sensor Ⅵ 49-Flow sensor Ⅵ 50-Differential pressure reducing valve Ⅲ 51-Three-position four-way proportional reversing valve 52-Shuttle valve Ⅱ 53-Actuator Ⅴ 54-Diverter valve Ⅴ 55-Relief valve Ⅵ 56-Cooler Ⅶ 57-Temperature sensor Ⅶ 58-Pressure sensor Ⅶ 59-Flow sensor Ⅶ 60-Proportional pressure reducing valve 61-Actuator Ⅵ 62- Relief valve VII 63- Cooler VIII 64- Temperature sensor VIII 65- Pressure sensor VIII 66- Flow sensor VIII 67- Differential pressure reducing valve IV 68- Proportional throttle valve 69- Actuator VII DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 Shown is a schematic diagram of the hydraulic system of the present invention.

[0023] The tractor hydraulic output outlet is connected to the flow sensor Ⅰ1. The tractor hydraulic output is integrated inside the tractor, and the engine usually drives the hydraulic pump as the power source of the hydraulic output. Two circuits are connected in parallel at the outlet of the flow sensor Ⅰ1. The first circuit is connected to the oil inlet of the proportional relief valve 4. The proportional relief valve 4 changes the opening pressure according to the size of the external input electrical signal, and the opening pressure can be continuously variable. In actual use, the opening pressure of the proportional relief valve 4 is set according to the maximum pressure of the system drive load. The oil outlet of the proportional relief valve 4 is connected to the cooler Ⅰ3. Since the cooler Ⅰ3 is in the main circuit, the flow rate may be large, so it needs to have a strong cooling capacity. The oil outlet of the cooler Ⅰ3 flows back to the oil tank. The second circuit is connected to the temperature sensor Ⅰ5 and the pressure sensor Ⅰ6, which are used to measure the oil temperature and working pressure of the main circuit respectively. The oil outlet of the second circuit is connected to the diverter valve Ⅰ7. The diverter valve Ⅰ7 is a manual type, and the diversion ratio can be manually adjusted. The output connection of the left side of the diverter valve Ⅰ7 is a filter Ⅰ8 with a display, which can display the blockage condition of the filter. Since the circuit control elements on the left side of the diverter valve Ⅰ7 are all manual valves and solenoid valves, the filtration accuracy of the filter Ⅰ8 is moderate. The oil outlet of the filter Ⅰ8 is connected to the diverter valve Ⅱ9. The diverter valve Ⅱ9 is a manual type, and the diversion ratio can be manually adjusted.

[0024] The left side output of the diverter valve Ⅱ9 is connected to two circuits in parallel. The first circuit is connected to the oil inlet of the overflow valve Ⅰ11. The overflow valve Ⅰ11 is a manual type and its opening pressure can be manually adjusted. The oil outlet of the overflow valve Ⅰ11 is connected to the cooler Ⅱ10, and the oil outlet of the cooler Ⅱ10 flows back to the oil tank. The second circuit is connected to the temperature sensor Ⅱ13, the pressure sensor Ⅱ14 and the flow sensor Ⅱ12, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The oil outlet of the second circuit is connected to the three-position four-way electromagnetic reversing valve Ⅰ15. The three-position four-way electromagnetic reversing valve Ⅰ15 has an M-type middle position function. When the left position is energized, the actuator Ⅰ16 moves in one direction. When the right position is energized, the actuator Ⅰ16 moves in the opposite direction. When it is not energized, the middle position is connected to the system to directly unload. The M-type middle position function can not only lock the actuator Ⅰ16, but also effectively reduce the system heating. The actuator Ⅰ can be a hydraulic cylinder or a hydraulic motor. This circuit is suitable for driving devices that require reversing and have relatively stable loads.

[0025] The right output of the diverter valve II9 is ​​connected to a diverter valve III26. The diverter valve III26 is a manual type, and the diverter ratio can be manually adjusted. The left output of the diverter valve III26 is connected to two circuits in parallel. The first circuit is connected to the oil inlet of the relief valve II18. The relief valve II18 is a manual type, and its opening pressure can be manually adjusted. The oil outlet of the relief valve II18 is connected to the cooler III17, and the oil outlet of the cooler III17 flows back to the oil tank. The second circuit is connected to the temperature sensor III20, the pressure sensor III21 and the flow sensor III19, which are used to measure the oil temperature and working pressure of the circuit respectively. force and flow, the oil outlet of the second circuit is connected to the differential pressure reducing valve Ⅰ22, the oil outlet of the differential pressure reducing valve Ⅰ22 is connected to the three-position four-way solenoid reversing valve Ⅱ23, the hydraulic control oil port of the differential pressure reducing valve Ⅰ22 is respectively connected to the inlet and outlet oil circuits of the three-position four-way solenoid reversing valve Ⅱ23, the oil outlet of the three-position four-way solenoid reversing valve Ⅱ23 is connected in parallel with the shuttle valve Ⅰ24, and the pressure compensation system is formed in conjunction with the shuttle valve Ⅰ24. The pressure compensation system can ensure that the output flow of the three-position four-way solenoid reversing valve Ⅱ23 remains constant regardless of load changes. The oil outlet of the three-position four-way solenoid reversing valve Ⅱ23 is connected to the actuator Ⅱ25. When the left position is energized, the actuator Ⅱ moves in one direction, and when the right position is energized, the actuator Ⅱ25 moves in the opposite direction. When it is not energized, the middle position is connected to the system to directly unload. The M-type middle position function can not only lock the actuator Ⅱ25, but also effectively reduce the system heating. The actuator Ⅱ25 can be a hydraulic cylinder or a hydraulic motor. This circuit is suitable for driving devices that require reversing, high speed accuracy and easily changeable loads.

[0026] The right output of the diverter valve III 26 is connected with a single-phase stable diverter valve 28, which can be used to ensure that the flow of one hydraulic oil output is stable and unchanged, and the other hydraulic oil changes with the oil change at the oil inlet. The oil outlet of the stable output of the single-phase stable diverter valve 28 is connected to two circuits in parallel, the first one is connected to the overflow valve III 27, the oil outlet of the overflow valve III 27 flows back to the oil tank, the second one is connected to the temperature sensor IV 31, the pressure sensor IV 32 and the flow sensor IV 33, which are respectively used to measure the oil temperature, working pressure and flow of the circuit, and the second oil outlet is connected to the differential pressure reducing Valve II 34, the oil outlet of differential pressure reducing valve II 34 is connected to variable throttle valve 35, differential pressure reducing valve II 34 is used to determine that the inlet and outlet pressure difference of the variable throttle valve is unchanged, and then the flow through the variable throttle valve is only related to the opening of the variable throttle port and has nothing to do with the load of the actuator III 36. The variable throttle valve is a manual adjustment type, and its throttle port opening can be changed manually. The oil outlet of the variable throttle valve is connected to the actuator III 36, and the oil outlet of the actuator III 36 is connected to the cooler V 37. The oil outlet of the cooler V 37 flows back to the oil tank. The actuator III 36 can be a single-acting hydraulic cylinder or a one-way hydraulic motor. This circuit can be used to drive a device that does not require reversing, has adjustable speed, changes in load, and has high precision requirements.

[0027] The unstable output port of the single-phase stable diverter valve 28 is connected in parallel with two hydraulic circuits. The first circuit is connected to the oil inlet of the overflow valve IV29. The overflow valve IV29 is a manual type, and its opening pressure can be manually adjusted. The oil outlet of the overflow valve IV29 is connected to the cooler IV30, and the hot oil flows back to the oil tank through the cooler IV30. The second circuit is connected to the temperature sensor V39, the pressure sensor V40 and the flow sensor V38, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The second oil outlet is connected to the three-position four-way electromagnetic reversing valve III41, which is an O-type middle position function. When the middle position is connected to the system, it can be used to lock the actuator IV42. When the left position is energized, the actuator IV42 moves in one direction, and when the right position is energized, the actuator IV42 moves in the opposite direction. The actuator IV42 can be a hydraulic cylinder or a hydraulic motor. This circuit is suitable for driving devices that do not work frequently, are reversible and have low precision requirements.

[0028] The right output of the diverter valve Ⅰ7 is connected to a filter Ⅱ43 with a display, and the filter Ⅱ43 can display the blockage situation. Since the control element of this line uses a proportional valve, its filtration accuracy is relatively high to ensure the service life of the element. The oil outlet of the filter Ⅱ43 is connected to the diverter valve Ⅳ44. The diverter valve Ⅳ44 is a manual type, and the diversion ratio can be manually adjusted. The left output of the diverter valve IV44 is connected to two circuits in parallel, the first circuit is connected to the relief valve V46, the relief valve V46 is a manual type, and its opening pressure can be manually adjusted. The oil outlet of the relief valve V46 is connected to the cooler VI45, and the hot oil of the cooler VI45 flows back to the oil tank. The second circuit is connected to the temperature sensor VI47, the pressure sensor VI48 and the flow sensor VI49, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The second oil outlet is connected to the differential pressure reducing valve III50, and the oil outlet of the differential pressure reducing valve III50 is connected to the three-position four-way proportional reversing valve 51. The hydraulic control oil ports of the differential pressure reducing valve III50 are respectively connected to the inlet and outlet oil circuits of the three-position four-way proportional reversing valve 51, and the oil outlet of the three-position four-way proportional reversing valve 51 is connected in parallel with a shuttle. Valve II 52, which is used in conjunction with shuttle valve II 52 to form a pressure compensation system, which can ensure that the output flow of the three-position four-way proportional reversing valve 51 is only related to the throttle opening of the valve itself. The throttle opening of the three-position four-way proportional reversing valve 51 is controlled by an input signal and can be infinitely adjustable between 0 opening and the maximum opening. The three-position four-way proportional reversing valve has an M-type middle position function. When the left position is energized, the actuator V53 moves in one direction. When the right position is energized, the actuator V53 moves in the opposite direction. When it is not energized, the middle position is connected to the system to directly unload. The M-type middle position function can lock the actuator V53 and effectively reduce the heating of the system. The actuator V53 can be a double-acting hydraulic cylinder or a bidirectional hydraulic motor. This circuit is suitable for driving devices that require speed regulation, reversing, and large load fluctuations.

[0029] The right output of the diverter valve 4 is connected to the diverter valve V54, which is a manual type and can adjust the diverting ratio manually. The left output of the diverter valve V54 is connected to two circuits in parallel, the first circuit is connected to the relief valve VI55, the relief valve VI55 is a manual type and its opening pressure can be adjusted manually, the oil outlet of the relief valve VI55 is connected to the cooler VII56, the second circuit is connected to the temperature sensor VII57, the pressure sensor VII58 and the flow sensor VII59, which are respectively used to measure the oil temperature, working pressure and flow of the circuit, the second oil outlet is connected to the proportional pressure reducing valve 60, the outlet pressure of the proportional pressure reducing valve is controlled by the input signal, and the output pressure can be infinitely adjustable, the oil outlet of the proportional pressure reducing valve 60 is connected to the actuator VI61, the oil return port of the actuator VI61 flows back to the oil tank, and the actuator VI61 can be a single-acting hydraulic cylinder or a one-way hydraulic motor. This circuit is suitable for driving devices that require stable speed, no need for reversing and adjustable pressure.

[0030] The right output of the diverter valve V54 is connected to two circuits in parallel, the first circuit is connected to the overflow valve VII62, the overflow valve VII62 is a manual type, and its opening pressure can be manually adjusted. The oil outlet of the overflow valve VII62 is connected to the cooler VIII63, and the second circuit is connected to the temperature sensor VIII64, the pressure sensor VIII65 and the flow sensor VIII66, which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The second oil outlet is the differential pressure reducing valve IV67, and the oil outlet of the differential pressure reducing valve IV67 is connected to the proportional throttle valve 68. The differential pressure reducing valve II67 is used to determine that the inlet and outlet pressure difference of the proportional throttle valve remains unchanged, and then the flow through the proportional throttle valve is only related to its throttle opening and has nothing to do with the load of the actuator VII69. The throttle of the proportional throttle valve can be infinitely adjusted according to the input signal. The output oil port of the proportional throttle valve is connected to the actuator VII 69, and the return oil port of the actuator VI 69 flows back to the oil tank. The actuator VI 69 can be a single-acting hydraulic cylinder or a one-way hydraulic motor. This circuit is suitable for driving devices that require electronically controlled stepless speed regulation and large load fluctuations.

[0031] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A tractor intelligent output interface, characterized in that: The tractor hydraulic output outlet is connected to flow sensor Ⅰ (1). The tractor hydraulic output is integrated inside the tractor, and the engine drives the hydraulic pump as the power source of the hydraulic output. Two circuits are connected in parallel at the outlet of the flow sensor Ⅰ (1). The first circuit is connected to the oil inlet of the proportional relief valve (4). The proportional relief valve (4) changes the opening pressure according to the size of the external input electrical signal. The oil outlet of the proportional relief valve (4) is connected to the cooler Ⅰ (3). The oil outlet of the cooler Ⅰ (3) flows back to the oil tank. The second circuit is connected to the temperature sensor Ⅰ (5) and the pressure sensor Ⅰ (6), which are used to measure the oil temperature and working pressure of the main circuit respectively. The oil outlet of the second circuit is connected to the diverter valve Ⅰ (7). The left output of the diverter valve Ⅰ (7) is connected to the filter Ⅰ (8) with a display, which can display the blockage condition of the filter; the oil outlet of the filter Ⅰ (8) is connected to the diverter valve Ⅱ (9); The left output of the diverter valve II (9) is connected to two circuits in parallel, wherein the first circuit is connected to the oil inlet of the overflow valve I (11), the oil outlet of the overflow valve I (11) is connected to the cooler II (10), the oil outlet of the cooler II (10) flows back to the oil tank, and the second circuit is connected to the temperature sensor II (13), the pressure sensor II (14) and the flow sensor II (12), which are respectively used to measure the oil temperature, working pressure and flow of the circuit, and the oil outlet of the flow sensor II (12) is connected to the three-position four-way electromagnetic reversing valve I (15), and the three-position four-way electromagnetic reversing valve I (15) is an M-type middle position function, and the M-type middle position function can lock the actuator I (16); The right output of the diverter valve II (9) is connected to a diverter valve III (26); the left output of the diverter valve III (26) is connected to two circuits in parallel, the first circuit is connected to the oil inlet of the relief valve II (18), the oil outlet of the relief valve II (18) is connected to the cooler III (17), the oil outlet of the cooler III (17) flows back to the oil tank, the second circuit is connected to the temperature sensor III (20), the pressure sensor III (21) and the flow sensor III (19), which are respectively used to measure the oil temperature, working pressure and flow of the circuit, the oil outlet of the flow sensor III (19) is connected to the differential pressure reducing valve I (2 2), the oil outlet of the differential pressure reducing valve Ⅰ (22) is connected to the three-position four-way electromagnetic reversing valve Ⅱ (23), the hydraulic control oil outlet of the differential pressure reducing valve Ⅰ (22) is respectively connected to the inlet and outlet oil circuits of the three-position four-way electromagnetic reversing valve Ⅱ (23), the oil outlet of the three-position four-way electromagnetic reversing valve Ⅱ (23) is connected in parallel with a shuttle valve Ⅰ (24), and the shuttle valve Ⅰ is used together with the shuttle valve Ⅰ to form a pressure compensation system, which can ensure that the output flow of the three-position four-way electromagnetic reversing valve Ⅱ (23) is not affected by load changes and remains constant; the oil outlet of the three-position four-way electromagnetic reversing valve Ⅱ (23) is connected to the actuator Ⅱ (25); The right output of the diverter valve III (26) is connected to a single-phase stable diverter valve (28). The single-phase stable diverter valve can be used to ensure that the flow rate of one hydraulic oil output is stable and unchanged, and the other hydraulic oil changes with the change of the oil in the oil inlet. The oil outlet of the stable output of the single-phase stable diverter valve is connected to two circuits in parallel. The first circuit is connected to the overflow valve III (27). The oil outlet of the overflow valve III (27) flows back to the oil tank. The second circuit is connected to the temperature sensor IV (31), the pressure sensor IV (32) and the flow sensor IV (33), which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The oil outlet of the flow sensor IV (33) is connected to the differential pressure reducing valve II (34). The oil outlet of the differential pressure reducing valve II (34) is connected to the variable throttle valve (35). The differential pressure reducing valve II (34) is used to ensure that the inlet and outlet pressure difference of the variable throttle valve remains unchanged. The unstable output port of the single-phase stable diverter valve (28) is connected to two hydraulic circuits in parallel, the first circuit is connected to the oil inlet of the relief valve IV (29), and the second circuit is connected to the temperature sensor V (39), the pressure sensor V (40) and the flow sensor V (38), which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The oil outlet of the flow sensor V (38) is connected to the three-position four-way electromagnetic reversing valve III (41), which is an O-type neutral position function. When the neutral position is connected to the system, it can be used to lock the actuator IV (42); The right output of the diverter valve I (7) is connected to a filter II (43) with a display. The filter II (43) can display the blockage status. Since the control element of the filter II (43) uses a proportional valve, its filtering accuracy is relatively high to ensure the service life of the proportional element. The oil outlet of the filter II (43) is connected to the diverter valve IV (44). The left output of the diverter valve IV (44) is connected to two circuits in parallel. The first circuit is connected to the overflow valve V (46). The oil outlet of the overflow valve V (46) is connected to the cooler VI (45). The hot oil of the cooler VI (45) flows back to the oil tank. The second circuit is connected to the temperature sensor VI (47), the pressure sensor VI (48) and the flow sensor VI. (49), respectively used to measure the oil temperature, working pressure and flow rate of the circuit, the oil outlet of the flow sensor VI (49) is connected to the differential pressure reducing valve III (50), the oil outlet of the differential pressure reducing valve III (50) is connected to the three-position four-way proportional reversing valve (51), the hydraulic control oil port of the differential pressure reducing valve III (50) is respectively connected to the inlet and outlet oil circuits of the three-position four-way proportional reversing valve (51), the oil outlet of the three-position four-way proportional reversing valve (51) is connected in parallel with the shuttle valve II (52), which is used in conjunction with the shuttle valve II (52) to form a pressure compensation system, the throttle opening of the three-position four-way proportional reversing valve (51) is controlled by an input signal, and can be infinitely adjustable between 0 opening and maximum opening; The right output of the diverter valve IV (44) is connected to the diverter valve V (54), and the left output of the diverter valve V (54) is connected to two circuits in parallel, the first circuit is connected to the relief valve VI (55), the oil outlet of the relief valve VI (55) is connected to the cooler VII (56), and the second circuit is connected to the temperature sensor VII (57), the pressure sensor VII (58) and the flow sensor VII (59), which are respectively used to measure the oil temperature, working pressure and flow of the circuit, the oil outlet of the flow sensor VII (59) is connected to the proportional pressure reducing valve (60), the outlet pressure of the proportional pressure reducing valve (60) is controlled by the input signal, the oil outlet of the proportional pressure reducing valve (60) is connected to the actuator VI (61), and the oil return port of the actuator VI flows back to the oil tank; The right output of the diverter valve V (54) is connected to two circuits in parallel, the first circuit is connected to the relief valve VII (62), the relief valve VIII is a manual type, and its opening pressure can be manually adjusted. The oil outlet of the relief valve VIII (62) is connected to the cooler VIII (63), and the second circuit is connected to the temperature sensor VIII (64), the pressure sensor VIII (65) and the flow sensor VIII (66), which are respectively used to measure the oil temperature, working pressure and flow of the circuit. The oil outlet of the flow sensor VIII (66) is connected to the differential pressure reducing valve IV (67). The oil outlet of the differential pressure reducing valve IV (67) is connected to the proportional throttle valve (68). The differential pressure reducing valve IV (67) is used to ensure that the inlet and outlet pressure difference of the proportional throttle valve (68) remains unchanged, thereby realizing that the flow through the proportional throttle valve is only related to the opening of its throttle port and has nothing to do with the load of the actuator VII (69). The throttle port of the proportional throttle valve (68) is infinitely adjusted according to the input signal; the oil outlet of the proportional throttle valve (68) is connected to the actuator VII (69), and the oil return port of the actuator VI (69) flows back to the oil tank.

2. The tractor intelligent output interface according to claim 1, characterized in that: The diverter valve I (7), diverter valve II (9), diverter valve III (26), diverter valve IV (44) and diverter valve V (54) are manual valves, and the diverter ratio can be adjusted manually.

3. The tractor intelligent output interface according to claim 1, characterized in that: The relief valve I (11), the relief valve II (18), the relief valve III (27), the relief valve IV (29), the relief valve V (46), and the relief valve VI (55) are all manual types, and their opening pressures can be adjusted manually; the variable throttle valve (35) can change its throttle opening manually, the oil outlet of the variable throttle valve (35) is connected to the actuator III (36), the oil outlet of the actuator III (36) is connected to the cooler V (37), and the oil outlet of the cooler V (37) flows back to the oil tank.

4. The tractor intelligent output interface according to claim 1, characterized in that: The actuator III (36) is a single-acting hydraulic cylinder or a one-way hydraulic motor; the actuator I (16) and the actuator II (25) are double-acting hydraulic cylinders or bidirectional hydraulic motors.

5. The tractor intelligent output interface according to claim 1, characterized in that: The oil outlet of the relief valve IV (29) is connected to the cooler IV (30), and the hot oil from the cooler IV (30) flows back to the oil tank.

6. The tractor intelligent output interface according to claim 1, characterized in that: Actuator IV (42) is a double-acting hydraulic cylinder or a bidirectional hydraulic motor; Actuator V (53) is a double-acting hydraulic cylinder or a bidirectional hydraulic motor; Actuator VI (61) is a single-acting hydraulic cylinder or a unidirectional hydraulic motor; Actuator VII is a single-acting hydraulic cylinder or a unidirectional hydraulic motor.

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