CN112339858A - Speed-multiplying steering control system and method for high-horsepower wheeled tractor - Google Patents
Speed-multiplying steering control system and method for high-horsepower wheeled tractor Download PDFInfo
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- CN112339858A CN112339858A CN202011070657.7A CN202011070657A CN112339858A CN 112339858 A CN112339858 A CN 112339858A CN 202011070657 A CN202011070657 A CN 202011070657A CN 112339858 A CN112339858 A CN 112339858A
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- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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- B62D15/00—Steering not otherwise provided for
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Abstract
The invention relates to a speed-multiplying steering control system and method for a high-horsepower wheeled tractor, which comprises an electrical system, a hydraulic system and a mechanical system, wherein the electrical system ensures that a speed-multiplying steering mode is started only when the speed and the turning state of a front axle meet requirements through the arrangement of a Beidou positioning terminal, a proximity switch and a combination instrument, so that the safety of speed-multiplying steering is fully ensured; through the design of speed-doubling steering enabling switch, the speed-doubling steering function can be closed in unnecessary time, a reliable tractor speed-doubling steering complete machine control system is formed through effective combination of an electric system, a hydraulic system and a mechanical system, personal safety when a tractor is driven is ensured, realization of the speed-doubling steering function under the large rotation angle state of a front axle in operation is ensured, and working efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of tractor system control, in particular to a speed-multiplying steering control system and method for a high-horsepower wheeled tractor.
Background
At present, in the agricultural production process, tractors are widely used for ploughing, sowing and the like; because the restriction of farmland plot area, the tractor need turn, turn around when advancing farmland one end to carry out the farming to the soil of adjacent region, through increasing double-speed steering mechanism, the tractor shortens turn time, can effectively promote work efficiency.
At present, speed-doubling steering is rarely applied to domestic tractors, as a new technology, related researches on mechanical transmission mechanisms of speed-doubling steering are more, and related researches on development of a complete machine speed-doubling steering control system are few. When the tractor turns, the front axle provides a turning signal to the speed-multiplying mechanical mechanism of the transfer case in any way, so that the speed-multiplying function is started, and the stability of the speed-multiplying mechanism is ensured; the system does not work in the field, but runs on the road, does not want to turn to the speed multiplication for personal safety, and controls the system not to start the speed multiplication function in any way; in field operation, for personal safety, the speed doubling function is not started in a state that the system is controlled to be higher than a certain speed by any mode; in any state of the front axle, the double-speed steering is allowed to be started.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a speed-multiplying steering control system and method for a high-horsepower wheeled tractor, which form a reliable speed-multiplying steering complete machine control system for the tractor through the effective combination of an electric system, a hydraulic system and a mechanical transmission system.
In order to achieve the purpose, the invention adopts the technical scheme that:
a speed-multiplying steering control system of a high-horsepower wheeled tractor comprises an electrical system, a hydraulic system and a mechanical system, wherein the electrical system comprises a storage battery, a power supply main switch, an electric lock, a resistor, an engine ECU (electronic control Unit) controller, a safety starting switch, a starting relay, a starter, a generator, a combination instrument, a power supply relay, a Beidou positioning terminal, a proximity switch, a speed-multiplying steering proximity switch relay, a speed-multiplying steering enabling switch, a speed-multiplying steering electromagnetic valve relay and a speed-multiplying steering electromagnetic valve; the Beidou positioning terminal is used for acquiring a speed signal of the whole machine and feeding back the speed signal to the combination instrument, the speed-multiplying steering proximity switch relay and the speed-multiplying steering electromagnetic valve relay at the same time; the proximity switch is used for switching on when the front axle rotates to a proper angle and inputting a signal to the speed-multiplying steering proximity switch relay, and the speed-multiplying steering proximity switch relay is absorbed and fed back to the combination instrument; the combination instrument is used for receiving electric information fed back by the Beidou positioning terminal and the speed-multiplying steering proximity switch relay, and transmitting a signal to the speed-multiplying steering enabling switch after processing the electric information; after the speed-multiplying steering enabling switch is pressed down and switched on, a signal is transmitted to a speed-multiplying steering electromagnetic valve relay; when a speed electric signal, a proximity switch closing electric signal and a speed steering enabling switch closing electric signal of a Beidou positioning terminal are simultaneously received by a speed steering electromagnetic valve relay, the speed steering electromagnetic valve relay is closed, the speed steering electromagnetic valve is electrified, a speed steering mode is started, a hydraulic system works, hydraulic oil enters the speed steering electromagnetic valve, the speed steering electromagnetic valve inputs the hydraulic oil into a speed steering wet clutch, the wet clutch transmits torque to a transmission shaft after being combined to drive a mechanical transmission system to work, and a front axle starts to carry out a speed steering operation mode.
Further, the hydraulic system comprises a transmission system box body, a coarse filter, a gear pump, a high pressure filter, a double-speed steering wet clutch and a radiator; after the speed-multiplying steering electromagnetic valve is electrified, the gear pump absorbs oil from the transmission system box body, hydraulic oil enters the speed-multiplying steering electromagnetic valve after rough filtration and high-pressure filtration, the electromagnetic valve inputs the hydraulic oil into the speed-multiplying steering wet clutch, the torque is transmitted to the transmission shaft after the wet clutch is combined, and redundant hydraulic oil is cooled by the radiator and then returns to the transmission system box body.
Furthermore, the pressure of hydraulic oil input to the double-speed steering wet clutch by the electromagnetic valve is 2Mpa, and the flow is 5L/min.
Further, the mechanical system comprises an engine assembly, a transmission system assembly, a double-speed steering transfer case assembly, a transmission shaft assembly and a front axle assembly.
Further, when the vehicle speed and the front axle turning angle both meet certain requirements, the signal for starting the speed-multiplying steering mode is transmitted to the speed-multiplying steering enabling switch by an internal program of the combination instrument.
Furthermore, the speed requirement of the turning-on speed-multiplying steering mode is less than or equal to 15 km/h.
And further, the front axle turning angle is monitored and fed back through a proximity switch, when the front axle turning angle is larger than or equal to 35 degrees, the proximity switch is switched on, and signals are fed back to the combination instrument through a double-speed turning proximity switch relay.
Further, the double speed steering enable switch is used for an operator to manually select whether to enter the double speed steering mode.
A speed-multiplying steering control method for a high-horsepower wheeled tractor, which realizes speed-multiplying steering of the tractor through the combination of an electrical system, a hydraulic system and a mechanical system, and comprises the following steps:
(1) starting an electrical system: the power main switch is turned on, the storage battery is switched on, and current is input into the electric lock through the resistor; the electric lock is unscrewed, and meanwhile, when the safety starting switch is in a switch-on state, the engine ECU controller is electrified to work, and starting electric signals are respectively transmitted to the starting relay, the combination instrument, the Beidou positioning terminal, the proximity switch and the double-speed steering electromagnetic valve relay; starting a relay to be actuated, starting a starter to work to drive a generator to start energy storage and power generation, simultaneously actuating a power supply relay, switching on a Beidou positioning terminal to start acquiring a speed signal of the whole machine and simultaneously feeding the speed signal back to a combination instrument, a speed-multiplying steering proximity switch relay and a speed-multiplying steering electromagnetic valve relay; when the front axle rotates to more than or equal to 35 degrees, the proximity switch is switched on, a signal is input into the speed-multiplying steering proximity switch relay, the relay is attracted and fed back to the combination instrument, and the combination instrument processes the electric information fed back by the Beidou positioning terminal and the electric information fed back by the speed-multiplying steering proximity switch relay and then transmits the processed electric information to the speed-multiplying steering enabling switch; after the speed-multiplying steering enabling switch is pressed down and switched on, a signal is transmitted to a speed-multiplying steering electromagnetic valve relay; when the speed-multiplying steering electromagnetic valve relay receives a speed electric signal, a proximity switch closing electric signal and a speed-multiplying steering enabling switch closing electric signal of the Beidou positioning terminal at the same time, the speed-multiplying steering electromagnetic valve relay is closed, and the speed-multiplying steering electromagnetic valve is electrified; at the moment, the whole electric system is in a speed-multiplying steering working state, and the hydraulic system is started to work;
(2) starting a hydraulic system: when the speed-doubling steering electromagnetic valve is electrified, the gear pump absorbs oil from the transmission system box body, hydraulic oil enters the speed-doubling steering electromagnetic valve after rough filtration and high-pressure filtration, the electromagnetic valve inputs the hydraulic oil with the pressure of 2Mpa to the speed-doubling steering wet clutch at the flow rate of 5L/min, the wet clutch transmits torque to the transmission shaft after combination, and redundant hydraulic oil returns to the transmission system box body after being radiated by the radiator; at the moment, the whole hydraulic system is completely in a speed-multiplying steering working state, and the mechanical transmission system is started to work;
(3) the mechanical system works: when the electric system and the hydraulic system are in a speed-doubling working state, the running engine transmits torque and rotating speed to a transmission system assembly of the mechanical system, the transmission system assembly transmits the torque and the rotating speed to a speed-doubling steering transfer case assembly after being subjected to speed regulation by internal gears, a combined wet clutch in the speed-doubling steering transfer case assembly transmits the torque and the rotating speed to a transmission shaft assembly, the final transmission shaft assembly transmits the torque and the rotating speed to a front axle assembly, and the front axle starts to perform a speed-doubling steering working mode.
Has the advantages that:
1. according to the invention, the intelligent instrument module is adopted to obtain the Beidou positioning signal, so that the signal input of the speed-multiplying steering system which can be started in a safe vehicle speed state can be accurately realized, and the signal input of the speed-multiplying steering system which cannot be started in a safe vehicle speed state is exceeded; the front axle proximity switch is used for collecting and selecting the model, so that the signal input that the speed-multiplying steering system can be started when the front axle rotates to a proper angle can be accurately realized, the signal input and the condition of the safe speed belong to a parallel relation, and the two conditions of starting the speed-multiplying steering mode are not enough; meanwhile, a speed-multiplying steering enabling switch is arranged, and the speed-multiplying steering function can be normally used only after the switch is pressed down; the tractor has the advantages that personal safety of the tractor during driving is simply and effectively guaranteed, realization of a double-speed steering function under a large-rotation-angle state of a front axle during operation is guaranteed, and working efficiency is effectively improved.
2. The combination meter selects an intelligent meter, an internal program of the intelligent meter can be used as a carrier to realize the receiving and conversion output of the opening signal of the double-speed steering system, and meanwhile, the conversion from electric control to hydraulic pressure is realized by matching the electromagnetic valve and the monostable valve, so that reliable system guarantee is provided for the realization of the function of the wet clutch of the double-speed steering module.
3. The stable hydraulic input flow and the stable hydraulic input pressure enable a wet clutch of the double-speed steering module to be combined quickly and stably, so that a driving transmission shaft transmits stable rotating speed and torque to a front axle input end, and the front axle double-speed steering working state is achieved. The conversion from hydraulic pressure to machinery ensures that a mechanical transmission mechanism with double-speed steering works smoothly, the technical principle is mature and reliable, and the system stability is high.
4. The technical scheme of the invention is simple and easy to realize, passes the test of a tractor trial-manufacturing prototype, has stable and reliable results, and is suitable for the technical scheme of the double-speed steering control system for developing new product tractors and the scheme for modifying the double-speed steering control system of the batched tractor models.
Drawings
FIG. 1 is an electrical schematic of a multiple speed steering control system;
FIG. 2 is a hydraulic schematic of a multiple speed steering control system;
fig. 3 is a mechanical structure diagram of the double-speed steering control system.
Reference numerals: 1-a storage battery; 2-power main switch; 3-electric lock; 4-resistance; 5-an engine ECU controller; 6-a safety starting switch; 7-starting the relay; 8-a starter; 9-a generator; 10-a combination meter; 11-power supply relay; 12-a Beidou positioning terminal; 13-a proximity switch; 14-speed steering approach switch relay; 15-speed steering enable switch; 16-speed steering solenoid relay; 17-speed-multiplying steering electromagnetic valve; 18-a driveline case; 19-coarse filtration; 20-gear pump; 21-high pressure filtration; 22-double speed steering wet clutch; 23-a heat sink; 24-an engine assembly; 25-a drive train assembly; 26-speed steering transfer case assembly; 27-a drive shaft assembly; 28-front axle assembly.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
The speed-multiplying steering control system of the high-horsepower wheeled tractor comprises an electrical system, a hydraulic system and a mechanical system, and realizes safe and reliable speed-multiplying steering control of the tractor through effective combination of the systems.
As shown in fig. 1, the electrical system includes a storage battery 1, a power main switch 2, an electric lock 3, a resistor 4, an engine ECU controller 5, a safety starting switch 6, a starting relay 7, a starter 8, a generator 9, a combination meter 10, a power relay 11, a beidou positioning terminal 12, a proximity switch 13, a double-speed steering proximity switch relay 14, a double-speed steering enable switch 15, a double-speed steering solenoid valve relay 16 and a double-speed steering solenoid valve 17, and the specific connection relationship is as shown in fig. 1.
The Beidou positioning terminal 12 is used for acquiring a speed signal of the whole machine and simultaneously feeding back the speed signal to the combination instrument 10, the speed-multiplying steering proximity switch relay 14 and the speed-multiplying steering electromagnetic valve relay 16; the proximity switch 13 is used for being switched on when the front axle rotates to a proper angle and inputting a signal to the speed-multiplying steering proximity switch relay 14, and the speed-multiplying steering proximity switch relay 14 is attracted and fed back to the combination instrument 10.
The combination meter selects an intelligent meter, signal processing of vehicle speed information and front axle turning information is achieved by developing an internal program of the combination meter, when both the vehicle speed and the front axle turning angle meet requirements, an opening signal is fed back to the electromagnetic valve to control the double-speed steering electromagnetic valve to be opened, and the electric system enters a double-speed steering mode. The speed-multiplying steering enabling switch, namely the safety pneumatic switch, is controlled by manual operation, and after the switch is pressed down, the speed-multiplying steering electromagnetic valve can only receive the speed-multiplying steering signal transmitted by the combination instrument, so that the speed-multiplying steering function can be normally used.
In the embodiment of the invention, the Beidou positioning signal is adopted to realize vehicle speed monitoring feedback (the acquisition frequency is 0.2 s); by developing an intelligent instrument program and selecting types of a proximity switch and a relay, the speed-doubling steering mode can be started only after a starting signal is collected from a front axle proximity switch (when a front axle turns to 35 degrees) when the vehicle speed is less than or equal to 15Km/h, namely the vehicle speed and the front axle turning angle meet the requirements, and the safety of the speed-doubling steering function is effectively improved.
The control principle and the working process of the electrical system are as follows: the power main switch 2 is turned on, the storage battery 1 is switched on, and current is input to the electric lock 3 through the resistor 4; the electric lock 3 is unscrewed, and meanwhile, when the safety starting switch 6 is in a connection state, the engine ECU controller 5 is electrified to work, and starting electric signals are respectively transmitted to the starting relay 7, the combination instrument 10, the Beidou positioning terminal 12, the proximity switch 13 and the double-speed steering electromagnetic valve relay 16; the starter 8 starts to work to drive the generator 9 to start energy storage and power generation, the power supply relay 11 starts to suck, and the Beidou positioning terminal 12 is switched on to start to acquire a speed signal of the whole machine and feed the speed signal back to the combination instrument 10, the speed-multiplying steering proximity switch relay 14 and the speed-multiplying steering electromagnetic valve relay 16; when the front axle rotates to more than or equal to 35 degrees, the proximity switch is switched on, a signal is input into the speed-multiplying steering proximity switch relay 14, and the speed-multiplying steering proximity switch relay 14 is sucked and fed back to the combination instrument 10; the combination instrument program receives a speed electric signal fed back by the Beidou positioning terminal 112 and an electric signal fed back by the speed-multiplying steering approach switch relay 14, and then the information is processed by an internal program and then transmitted to the speed-multiplying steering enable switch 15; after the speed-multiplying steering enable switch 15 is pressed down and switched on, a signal is transmitted to a speed-multiplying steering electromagnetic valve relay 16; when the speed-multiplying steering electromagnetic valve relay 16 receives the speed electric signal of the Beidou positioning terminal 12, the closing electric signal of the proximity switch 13 and the closing electric signal of the speed-multiplying steering enabling switch 15 at the same time, the speed-multiplying steering electromagnetic valve relay 16 and the speed-multiplying steering electromagnetic valve 17 are electrified. At the moment, the whole electric system is completely in a speed-multiplying steering working state, and the hydraulic system is started to work in the next step.
As shown in fig. 2, the hydraulic system and the electric system are connected by a double speed steering solenoid valve 17, a gear pump 20 in the hydraulic system is connected to a transmission case 18 by a coarse filter 19, and then connected to the double speed steering solenoid valve 17 by a high pressure filter 21, and the double speed steering solenoid valve 17 is connected to a double speed steering wet clutch 22 of the mechanical system.
The hydraulic system is provided with an electromagnetic valve, and an oil way is led out to the outer side of the box body through a connecting block; the model selection monostable valve (ensuring the pressure of a speed-doubling steering system to be 2Mpa and the flow to be 5L/min) inputs pressure oil to an oil inlet of a speed-doubling steering module after the electromagnetic valve is opened through a hydraulic pipeline.
The working principle of the hydraulic system is as follows: when the speed-doubling steering electromagnetic valve 17 is powered on, the gear pump 20 absorbs oil from the transmission system box 18, hydraulic oil enters the speed-doubling steering electromagnetic valve 17 after being filtered by rough filtration 19 and high pressure filtration 21, the electromagnetic valve inputs the hydraulic oil with the pressure of 2Mpa to the speed-doubling steering wet clutch 22 at the flow rate of 5L/min, the wet clutch is combined to transmit torque to the transmission shaft, and redundant hydraulic oil is cooled by the radiator 23 and then returns to the transmission system box. At the moment, the whole hydraulic system is completely in a speed-multiplying steering working state, and the mechanical transmission system is started to work in the next step.
As shown in FIG. 3, the mechanical system includes an engine assembly 24, a drive train assembly 25, a double speed steering transfer case assembly 26, a drive shaft assembly 27 and a front axle assembly 28; a four-stage speed reduction front axle is adopted to match with a small tire to obtain a large steering angle; when the speed-multiplying steering electromagnetic valve 17 is opened, pressure oil conveyed by the hydraulic system pushes the wet clutch of the speed-multiplying steering mechanical module to work, so that a driving shaft and a front axle are driven to realize the mechanical transmission function of the speed-multiplying steering mechanism.
The mechanical structure transmission mode is as follows: when the electric system and the hydraulic system are all in a speed-doubling working state, the running engine 24 transmits torque and rotating speed to the transmission system assembly 25, the transmission system assembly 25 adjusts the speed through internal gears and transmits the torque and the rotating speed to the speed-doubling steering transfer case assembly 26, the speed-doubling steering wet clutch 22 combined in the speed-doubling steering transfer case assembly 26 transmits the torque and the rotating speed to the transmission shaft assembly 27, finally the transmission shaft assembly 27 transmits the torque and the rotating speed to the front axle assembly 28, and the front axle starts to perform a speed-doubling steering working mode.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A high-horsepower wheeled tractor speed-multiplying steering control system comprises an electrical system, a hydraulic system and a mechanical system, and is characterized in that the electrical system comprises a storage battery, a power supply main switch, an electric lock, a resistor, an engine ECU (electronic control Unit) controller, a safety starting switch, a starting relay, a starter, a generator, a combination instrument, a power supply relay, a Beidou positioning terminal, a proximity switch, a speed-multiplying steering proximity switch relay, a speed-multiplying steering enabling switch, a speed-multiplying steering electromagnetic valve relay and a speed-multiplying steering electromagnetic valve; the Beidou positioning terminal is used for acquiring a speed signal of the whole machine and feeding back the speed signal to the combination instrument, the speed-multiplying steering proximity switch relay and the speed-multiplying steering electromagnetic valve relay at the same time; the proximity switch is used for switching on when the front axle rotates to a proper angle and inputting a signal to the speed-multiplying steering proximity switch relay, and the speed-multiplying steering proximity switch relay is absorbed and fed back to the combination instrument; the combination instrument is used for receiving electric information fed back by the Beidou positioning terminal and the speed-multiplying steering proximity switch relay, and transmitting a signal to the speed-multiplying steering enabling switch after processing the electric information; after the speed-multiplying steering enabling switch is pressed down and switched on, a signal is transmitted to a speed-multiplying steering electromagnetic valve relay; when a speed electric signal, a proximity switch closing electric signal and a speed steering enabling switch closing electric signal of a Beidou positioning terminal are simultaneously received by a speed steering electromagnetic valve relay, the speed steering electromagnetic valve relay is closed, the speed steering electromagnetic valve is electrified, a speed steering mode is started, a hydraulic system works, hydraulic oil enters the speed steering electromagnetic valve, the speed steering electromagnetic valve inputs the hydraulic oil into a speed steering wet clutch, the wet clutch transmits torque to a transmission shaft after being combined to drive a mechanical system to work, and a front axle starts to carry out a speed steering operation mode.
2. A high-powered wheeled tractor speed-multiplying steering control system as claimed in claim 1, wherein said hydraulic system includes a drive train housing, coarse filters, gear pumps, high pressure filters, speed-multiplying steering wet clutches and a radiator; after the speed-multiplying steering electromagnetic valve is electrified, the gear pump absorbs oil from the transmission system box body, hydraulic oil enters the speed-multiplying steering electromagnetic valve after rough filtration and high-pressure filtration, the electromagnetic valve inputs the hydraulic oil into the speed-multiplying steering wet clutch, the torque is transmitted to the transmission shaft after the wet clutch is combined, and redundant hydraulic oil is cooled by the radiator and then returns to the transmission system box body.
3. The speed-doubling steering control system of a high-horsepower wheeled tractor according to claim 2, wherein the hydraulic oil pressure input to the speed-doubling steering wet clutch by the solenoid valve is 2Mpa, and the flow rate is 5L/min.
4. A multiple speed steering control system for a high horsepower wheeled tractor according to claim 1 wherein said mechanical system comprises an engine assembly, a drive train assembly, a multiple speed steering transfer case assembly, a drive shaft assembly and a front axle assembly.
5. The system of claim 1, wherein the combination meter is programmed to transmit a signal to turn on the double-speed steering mode to the double-speed steering enable switch when the vehicle speed and the front axle turning angle meet a predetermined requirement.
6. The speed-multiplying steering control system for a high-powered wheeled tractor according to claim 5, wherein the speed requirement for turning on the speed-multiplying steering mode is 15km/h or less.
7. The speed-multiplying steering control system for a high-powered wheeled tractor according to claim 5, wherein the front axle turning angle is monitored and fed back through a proximity switch, and when the front axle turning angle is equal to or greater than 35 °, the proximity switch is turned on, and a signal is fed back to the combination meter through a speed-multiplying steering proximity switch relay.
8. A multiple speed steering control system for a high horsepower wheeled tractor according to claim 1 wherein the multiple speed steering enable switch is adapted to allow an operator to manually select whether to enter the multiple speed steering mode.
9. A speed-multiplying steering control method for a high-horsepower wheeled tractor is characterized by comprising the following steps of:
(1) starting an electrical system: the power main switch is turned on, the storage battery is switched on, and current is input into the electric lock through the resistor; the electric lock is unscrewed, and meanwhile, when the safety starting switch is in a switch-on state, the engine ECU controller is electrified to work, and starting electric signals are respectively transmitted to the starting relay, the combination instrument, the Beidou positioning terminal, the proximity switch and the double-speed steering electromagnetic valve relay; starting a relay to be actuated, starting a starter to work to drive a generator to start energy storage and power generation, simultaneously actuating a power supply relay, switching on a Beidou positioning terminal to start acquiring a speed signal of the whole machine and simultaneously feeding the speed signal back to a combination instrument, a speed-multiplying steering proximity switch relay and a speed-multiplying steering electromagnetic valve relay; when the front axle rotates to more than or equal to 35 degrees, the proximity switch is switched on, a signal is input into the speed-multiplying steering proximity switch relay, the relay is attracted and fed back to the combination instrument, and the combination instrument processes the electric information fed back by the Beidou positioning terminal and the electric information fed back by the speed-multiplying steering proximity switch relay and then transmits the processed electric information to the speed-multiplying steering enabling switch; after the speed-multiplying steering enabling switch is pressed down and switched on, a signal is transmitted to a speed-multiplying steering electromagnetic valve relay; when the speed-multiplying steering electromagnetic valve relay receives a speed electric signal, a proximity switch closing electric signal and a speed-multiplying steering enabling switch closing electric signal of the Beidou positioning terminal at the same time, the speed-multiplying steering electromagnetic valve relay is closed, and the speed-multiplying steering electromagnetic valve is electrified; at the moment, the whole electric system is in a speed-multiplying steering working state, and the hydraulic system is started to work;
(2) starting a hydraulic system: when the speed-doubling steering electromagnetic valve is electrified, the gear pump absorbs oil from the transmission system box body, hydraulic oil enters the speed-doubling steering electromagnetic valve after rough filtration and high-pressure filtration, the electromagnetic valve inputs the hydraulic oil with the pressure of 2Mpa to the speed-doubling steering wet clutch at the flow rate of 5L/min, the wet clutch transmits torque to the transmission shaft after combination, and redundant hydraulic oil returns to the transmission system box body after being radiated by the radiator; at the moment, the whole hydraulic system is completely in a speed-multiplying steering working state, and the mechanical transmission system is started to work;
(3) the mechanical system works: when the electric system and the hydraulic system are in a speed-doubling working state, the running engine transmits torque and rotating speed to a transmission system assembly of the mechanical system, the transmission system assembly transmits the torque and the rotating speed to a speed-doubling steering transfer case assembly after being subjected to speed regulation by internal gears, a combined wet clutch in the speed-doubling steering transfer case assembly transmits the torque and the rotating speed to a transmission shaft assembly, the final transmission shaft assembly transmits the torque and the rotating speed to a front axle assembly, and the front axle starts to perform a speed-doubling steering working mode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561775A (en) * | 2021-08-30 | 2021-10-29 | 江苏悦达智能农业装备有限公司 | Tractor circuit control device |
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| CN108412973A (en) * | 2018-05-16 | 2018-08-17 | 李俊年 | Front transmission mechanism with speed turning function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561775A (en) * | 2021-08-30 | 2021-10-29 | 江苏悦达智能农业装备有限公司 | Tractor circuit control device |
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