CN113442722B - Hydraulic driving method of corn harvester - Google Patents

Hydraulic driving method of corn harvester Download PDF

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Publication number
CN113442722B
CN113442722B CN202110879141.5A CN202110879141A CN113442722B CN 113442722 B CN113442722 B CN 113442722B CN 202110879141 A CN202110879141 A CN 202110879141A CN 113442722 B CN113442722 B CN 113442722B
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China
Prior art keywords
hydraulic
oil
steering
pump
port
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CN113442722A (en
Inventor
李衡
李侠
杨香林
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Hebei Yinghu Agricultural Machinery Manufacturing Co Ltd
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Hebei Yinghu Agricultural Machinery Manufacturing Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B69/00—Steering of agricultural machines or implements; Guiding agricultural machines or implements on a desired track
    • A01B69/007—Steering or guiding of agricultural vehicles, e.g. steering of the tractor to keep the plough in the furrow
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D45/00—Harvesting of standing crops
    • A01D45/02—Harvesting of standing crops of maize, i.e. kernel harvesting
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
    • A01D69/03—Driving mechanisms or parts thereof for harvesters or mowers fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

The invention discloses a hydraulic driving method of a corn harvester, which is realized based on a hydraulic traveling system of the corn harvester, wherein the hydraulic traveling system comprises a hydraulic driving system, a hydraulic steering system and a hydraulic braking system; the method comprises the following steps: the method comprises the steps of starting, hydraulic pump gear shifting, gearbox gear shifting, hydraulic steering and hydraulic braking. The hydraulic driving method of the corn harvester is simple in structure of the walking system, high in transmission efficiency, low in installation space requirement and convenient and fast to operate, and has important significance for optimization of the corn harvester and harvesting of crops.

Description

Hydraulic driving method of corn harvester
Technical Field
The invention relates to a hydraulic driving method of a corn harvester, belonging to the technical field of crop harvesters.
Background
The corn harvester generally comprises a cluster cutting table, a straw cutting table, a large elevator, a peeling machine, a grass bin, a granary, a returning machine, a cab and the like, and a large number of transmission parts are arranged between each device and an engine and between each device, so that the space structure of a harvester body is very complex. The walking system of the existing harvester adopts a traditional mechanical transmission structure, and the walking system is driven to walk in a mechanical transmission mode.
For example, a conventional patent 201620356184.X discloses a dual-power transmission device of a small-sized corn harvester, wherein power output wheels are respectively arranged at the front and the rear of an engine, the front and the rear power output wheels are respectively in transmission connection with a front gearbox and a rear gearbox through a transmission belt to drive the front gearbox and the rear gearbox to work, the front gearbox and the rear gearbox respectively drive a front wheel and a rear wheel to rotate through structures such as a transmission shaft, and thus, the walking drive of the harvester is realized. However, the conventional mechanical walking system has high requirements on the mounting positions and directions of an engine and a gearbox, and the transmission shaft and the belt are adopted for transmitting power, so that the structure is complex, the mounting space requirement is high, the requirements on the vehicle body space structure of the harvester during mounting are high, the design and mounting of the position and the size of other devices of the harvester are greatly influenced, the traditional mechanical walking system is not suitable for the complex vehicle body structure of the harvester, and the whole structure optimization of the harvester is not facilitated. And the transmission shaft and the belt have multiple power transmission stages for transmitting power, the transmission efficiency is low, and the energy consumption is increased.
Therefore, how to provide a hydraulic walking system of a harvester and a hydraulic driving method of the harvester, which have the advantages of simple walking system structure, high transmission efficiency, low requirement on installation space and convenience in operation, is one of the technical problems which are urgently needed to be solved at present.
Disclosure of Invention
In view of the prior art, the invention aims to provide a hydraulic driving method of a corn harvester, which adopts a hydraulic walking system for driving, does not need to be provided with a complex transmission structure, adopts a hydraulic pipeline for transmitting the power, has simple structure, flexible pipeline arrangement and small occupied space, meets the complex vehicle body space structure of the harvester, adopts the hydraulic system with high transmission efficiency, reduces the energy consumption of the harvester, saves the harvesting cost, and adopts the hydraulic driving mode for walking driving, the driving mode is convenient and fast, and the operation is simple.
The purpose of the invention is realized by the following technical scheme.
A hydraulic driving method of a corn harvester is realized based on a hydraulic traveling system of the corn harvester, wherein the hydraulic traveling system comprises a hydraulic driving system, a hydraulic steering system and a hydraulic braking system;
the hydraulic drive system includes: the hydraulic pump is arranged on the engine, the hydraulic motor is respectively and simultaneously connected with the hydraulic oil tank, the hydraulic motor and the radiator, and the radiator is connected with the hydraulic oil tank;
the method comprises the following steps: starting, shifting a hydraulic pump, shifting a gearbox, hydraulically steering and hydraulically braking;
the starting step comprises: the engine is started, the engine drives the hydraulic pump, the gear pump and the air pump to work, the hydraulic pump pumps hydraulic oil in the hydraulic oil tank to the hydraulic pump for pressurization, and high-pressure hydraulic oil is provided for the hydraulic motor port A or the hydraulic motor port B through the hydraulic pump port A pipe joint or the hydraulic pump port B pipe joint so as to drive the hydraulic motor to work.
Furthermore, in the starting step, high-temperature hydraulic oil is discharged from an oil outlet pipe joint of the hydraulic pump, enters the radiator from the inlet of the radiator through a hydraulic pipeline for heat dissipation and cooling, and the low-temperature hydraulic oil cooled by the radiator flows back to the hydraulic oil tank from the oil return port of the hydraulic oil tank through the hydraulic pipeline.
Furthermore, the hydraulic steering system is used for controlling the direction of the rear wheels so as to change the walking direction of the harvester, the hydraulic steering system comprises a gear pump, a reversing valve and a left steering oil cylinder and a right steering oil cylinder, the gear pump is arranged on an engine and drives the gear pump to work through the engine, a gear pump oil inlet and a gear pump oil outlet are arranged on the gear pump, a hydraulic oil tank second outlet is also arranged on the hydraulic oil tank, the second outlet of the hydraulic oil tank is connected with the gear pump oil inlet through a hydraulic oil pipe, the gear pump oil outlet is connected with a reversing valve P port of the reversing valve through a hydraulic oil pipe, a reversing valve T port of the reversing valve is connected with an inlet of an oil tank filter arranged at the top end of the hydraulic oil tank through a hydraulic pipeline, one end of a steering oil cylinder is hinged to a rear axle, the other end of the steering oil cylinder is hinged to a rear wheel, a steering oil cylinder A port and a steering oil cylinder B port are arranged on the steering oil cylinder, a reversing valve A port and a reversing valve B port are arranged on a reversing valve, the reversing valve A port is connected with an oil inlet of a first steering three-way valve through an oil inlet pipe of the first steering three-way valve, two oil outlets of the first steering three-way valve are respectively connected with the steering oil cylinder A ports of the left steering oil cylinder and the right steering oil cylinder, the reversing valve B port is connected with an oil inlet of a second steering three-way valve through an oil inlet pipe of the second steering three-way valve, and two oil outlets of the second steering three-way valve are respectively connected with the steering oil cylinder B ports of the left steering oil cylinder and the right steering oil cylinder.
Further, the hydraulic brake system comprises an air pump, the air pump is installed on an engine, the air pump is driven to work through the engine, the air pump is communicated with a high-pressure air storage tank through a first metal pipe, the high-pressure air storage tank is communicated with a pneumatic brake valve through a second metal pipe, the pneumatic brake valve is connected with a relay valve through a third metal pipe, the relay valve is communicated with a brake three-way valve through a brake hose, the brake three-way valve is communicated with a left brake caliper and a right brake caliper through a fourth metal pipe, the brake caliper is matched with a brake disc to brake, the pneumatic brake valve is connected with a brake pedal mechanism, and the pneumatic brake valve is controlled to be opened and closed through the brake pedal mechanism.
The hydraulic pump comprises a hydraulic pump oil inlet pipe joint, a hydraulic pump A port pipe joint, a hydraulic pump B port pipe joint, a hydraulic pump shell oil return pipe joint and a hydraulic pump oil outlet pipe joint, the hydraulic pump oil inlet pipe joint is connected with one end of a first oil inlet pipe, the other end of the first oil inlet pipe is connected with an inlet of a low-pressure oil filter, an outlet of the low-pressure oil filter is connected with one end of a second oil inlet pipe, the other end of the second oil inlet pipe is connected with a first outlet of a hydraulic oil tank of the hydraulic oil tank, the hydraulic motor comprises a hydraulic motor A port, a hydraulic motor B port and a motor shell oil return port, the hydraulic motor A port is connected with the hydraulic pump A port pipe joint through a hydraulic pipeline, the hydraulic motor B port is connected with the hydraulic pump B port pipe joint through a hydraulic pipeline, the motor shell oil return port is connected with the hydraulic pump shell oil return pipe joint through a hydraulic pipeline, the radiator is arranged on one side of an engine fan, the radiator is used for radiating heat, a radiator is arranged on the radiator, the radiator is provided with a radiator inlet and a radiator outlet, the hydraulic pump oil outlet is connected with a hydraulic pump inlet and a gear shifting mechanism, a gear shifting pull rod is arranged on a gear shifting wheel brake bridge, and a gear shifting mechanism, a gear shifting pull rod are arranged on the gear shifting mechanism, and a gear shifting pull rod are arranged on the gear shifting mechanism.
Further, in the starting step, the air pump adds air into the high-pressure air storage tank through the first metal pipe to serve as a high-pressure air source, and the high-pressure air storage tank provides high-pressure air to the pneumatic brake valve through the second metal pipe.
Furthermore, in the starting step, the gear pump sucks hydraulic oil from a hydraulic oil tank, high-pressure hydraulic oil is supplied to the reversing valve from an oil outlet of the gear pump after the hydraulic oil is pressurized, and the hydraulic oil discharged from a T port of the reversing valve flows back to the hydraulic oil tank through the hydraulic oil pipe and the oil tank filter.
Further, the hydraulic pump gear shifting step specifically includes: the shifting pull wire is pulled by shifting the gear shifting lever of the hydraulic pump in the cab, the shifting pull wire sequentially drives the shifting pull rod, the hinged joint and the shifting lever to control the shifting mechanism through shifting, the flow and the flow direction of the hydraulic pump are controlled through the shifting mechanism, the rotating direction and the rotating speed of the hydraulic motor are switched, and then the advancing direction and the advancing power of the harvester are switched.
Further, the gearbox shifting steps are specifically as follows: the speed changing box is characterized in that a gear box gear shifting rod in a cab is shifted, a hydraulic motor drives a gear box to work, the gear box drives a brake disc to rotate through a gear box output shaft, the brake disc drives a wheel side speed reducer to work and then drives a front wheel to walk, a gear shifting mechanism of the gear box is adjusted through the gear box gear shifting rod to change gears of the gear box, and the walking speed of a harvester is adjusted.
Further, the hydraulic steering step specifically comprises: rotating a steering wheel to control a reversing valve, wherein an opening A of the reversing valve conveys hydraulic oil to an oil inlet of a first steering three-way valve through an oil inlet pipe of the first steering three-way valve, two oil outlets of the first steering three-way valve respectively convey the hydraulic oil to openings A of steering cylinders of a left steering cylinder and a right steering cylinder, a opening B of the steering cylinder simultaneously returns the hydraulic oil to an oil outlet of a second steering three-way valve, and an oil inlet of the second steering three-way valve returns the hydraulic oil to the opening B of the reversing valve so as to adjust the lengths of the two steering cylinders and adjust the direction of a rear wheel in a forward direction; on the contrary, a port B of the reversing valve conveys hydraulic oil to an oil inlet of a second steering three-way valve through an oil inlet pipe of the second steering three-way valve, two oil outlets of the second steering three-way valve respectively convey hydraulic oil to ports B of steering cylinders of a left steering cylinder and a right steering cylinder, a port A of the steering cylinder returns hydraulic oil to an oil outlet of a first steering three-way valve, an oil inlet of the first steering three-way valve returns hydraulic oil to the port A of the reversing valve, the lengths of the two steering cylinders are reversely adjusted, and the direction of a rear wheel is reversely adjusted;
the hydraulic braking steps are as follows: the pneumatic brake valve is opened by stepping on the brake pedal mechanism, high-pressure gas is input into the relay valve through the third metal pipe, the relay valve rapidly conveys the high-pressure gas to the three-way valve through the brake hose, the high-pressure gas respectively provides air pressure for the left brake caliper and the right brake caliper through the three-way valve, so that the two brake pads are driven by the brake calipers to be tightly held with the brake disc, and the braking of the front wheel is realized.
The invention has the advantages that:
1. the hydraulic walking system of the corn harvester comprises a hydraulic driving system, a hydraulic steering system and a hydraulic braking system, wherein the hydraulic driving system is used for driving the harvester to walk, the hydraulic steering system is used for controlling the direction of a rear wheel so as to change the walking direction of the harvester, and the hydraulic braking system is used for braking the harvester. Compared with a transmission mechanical driving system, the harvester is not limited by space, hydraulic pipelines are flexibly wired, a large number of transmission shafts are not required to be arranged for power transmission, the transmission efficiency is high, the space occupation is small, the position and the direction of an engine are not limited, and the harvester is better adapted to the complex space structure.
2. The radiator of the hydraulic driving system simultaneously dissipates the heat of hydraulic oil and engine cooling liquid, the independent radiator is prevented from being arranged to dissipate the heat of the hydraulic oil, the engine simultaneously drives the hydraulic pump, the air pump and the gear pump to work, a plurality of driving devices are not required to be independently arranged, the size of the hydraulic traveling system is reduced, and the overall structure of the harvester is optimized.
3. Set up gearshift on the hydraulic pump, the last driving lever of shifting that is provided with of gearshift, the driving lever of shifting 2.10 is articulated with the hinge joint, and the hinge joint is connected with the pull rod of shifting, and the pull rod of shifting is acted as go-between with shifting and is connected, wherein shifts and sets up a plurality of hinge holes on the driving lever, is convenient for adjust articulated position, more accurate shifting. In addition, the tip of articulated joint is provided with the thread bush, and the tip of the pull rod of shifting is provided with the threaded rod, and threaded rod 2.13 screw-thread fit is in the thread bush, through the position of adjusting the threaded rod in the thread bush, and then adjusts the elasticity of shifting the acting as go-between, further improves the degree of accuracy of shifting.
4. The hydraulic driving method of the corn harvester is better suitable for the hydraulic walking system, the operation mode of the hydraulic driving method is the same as or similar to that of a driving walking system, the operation is simple, and the hydraulic driving method is better convenient for operators to operate.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic diagram of the overall structure of the hydraulic walking system.
Fig. 2 is a schematic structural diagram of the hydraulic drive system.
Fig. 3 is a first schematic view of a hydraulic pump.
Fig. 4 is a schematic diagram of a hydraulic pump.
Fig. 5 is a partial schematic view at a.
Fig. 6 is a schematic structural view of the hydraulic motor.
Fig. 7 is a schematic structural view of the hydraulic steering system.
Fig. 8 is a first schematic view of a gear pump.
Fig. 9 is a schematic diagram of a gear pump structure.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in FIG. 1, according to an embodiment of the invention, a hydraulic walking system of a corn harvester is provided, which comprises a hydraulic driving system, a hydraulic steering system and a hydraulic braking system. The hydraulic driving system is used for driving the harvester to walk, the hydraulic steering system is used for controlling the direction of the rear wheels so as to change the walking direction of the harvester, and the hydraulic braking system is used for braking the harvester.
As shown in fig. 2, the hydraulic drive system includes an engine 1, a hydraulic pump 2, a hydraulic oil tank 3, and a hydraulic motor 5, wherein the engine 1 is provided with a first transfer case, the first transfer case is provided with the hydraulic pump 2, and the hydraulic pump 2 is driven to operate by the first transfer case.
As shown in fig. 3-5, the hydraulic pump 2 includes a hydraulic pump oil inlet pipe joint 2.1, a hydraulic pump port a pipe joint 2.2, a hydraulic pump port B pipe joint 2.3, a hydraulic pump casing oil return pipe joint 2.4, and a hydraulic pump oil outlet pipe joint 2.5.
As shown in figure 2, the oil inlet pipe joint 2.1 of the hydraulic pump is connected with one end of a first oil inlet pipe 4.1, the other end of the first oil inlet pipe 4.1 is connected with an inlet of a low-pressure oil filter 4.2, an outlet of the low-pressure oil filter 4.2 is connected with one end of a second oil inlet pipe 4.3, and the other end of the second oil inlet pipe 4.3 is connected with a first outlet 3.12 of a hydraulic oil tank 3. When the hydraulic pump 2 works, hydraulic oil in the hydraulic oil tank 3 is pumped into the hydraulic pump 2 through the first oil inlet pipe 4.1, the low-pressure oil filter 4.2 and the second oil inlet pipe 4.3. Wherein, 4.12's of low pressure oil filter's setting can be with entering into the filtration of the very big degree of impurity in the hydraulic oil of hydraulic pump 2, effectively prevents impurity in the hydraulic oil to hydraulic pump, hydraulic motor's wearing and tearing, reduces the risk that hydraulic drive circulation flow path blockked up, reduces the fault rate.
As shown in fig. 2 and 6, the hydraulic motor 5 includes a hydraulic motor a port 5.1, a hydraulic motor B port 5.2, and a motor housing return port 5.3. The hydraulic motor A port 5.1 is connected with the hydraulic pump A port pipe joint 2.2 through a hydraulic pipeline, the hydraulic motor B port 5.2 is connected with the hydraulic pump B port pipe joint 2.3 through a hydraulic pipeline, and the motor shell oil return port 5.3 is connected with the hydraulic pump shell oil return pipe joint 2.4 through a hydraulic pipeline. During the working process of the hydraulic pump 2, hydraulic oil in the hydraulic oil tank 3 is pumped into the hydraulic pump 2 for pressurization, and high-pressure hydraulic oil is supplied to a hydraulic motor B port 5.2 and a hydraulic motor A port 5.1 through a hydraulic pump A port pipe joint 2.2 and a hydraulic pump B port pipe joint 2.3 to drive the hydraulic motor 5 to work. Furthermore, the hydraulic oil accumulated in the hydraulic motor 5 housing is drained out of the motor housing return 5.3 and returned via the hydraulic line to the hydraulic pump housing return connection 2.4 and back again to the hydraulic pump 2.
As shown in fig. 2, the hydraulic drive system further includes a radiator 10, the radiator 10 is disposed on one side of the engine fan, and the radiator 10 is cooled by the engine fan, so that the radiator fan is not separately disposed, the size of the radiator is reduced, the overall structure of the harvester is optimized, and the cooling efficiency is improved. The radiator 10 simultaneously radiates the hydraulic oil of the hydraulic traveling system and the cooling liquid of the engine, so that the radiator of the hydraulic traveling system is prevented from being independently arranged, and the space occupation of the hydraulic traveling system is reduced.
The radiator 10 is provided with a radiator inlet 10.1 and a radiator outlet 10.2. The hydraulic pump oil outlet pipe joint 2.5 is connected with the radiator inlet 10.1 through a hydraulic pipeline, and the radiator outlet 10.2 is connected with the hydraulic oil tank oil return opening 3.2 on the hydraulic oil tank 3 through a hydraulic pipeline. When the hydraulic oil circulates in the flow path, the hydraulic oil is subjected to compression, shearing, friction, and the like, and the temperature of the hydraulic oil becomes excessively high. In the working process of the hydraulic pump 2, high-temperature hydraulic oil is discharged from the hydraulic pump oil outlet pipe joint 2.5 and enters the radiator 10 from the radiator inlet 10.1 through a hydraulic pipeline to dissipate heat and reduce temperature. The low-temperature hydraulic oil cooled by the radiator flows back to the hydraulic oil tank 3 from the oil return port 3.2 of the hydraulic oil tank through a hydraulic pipeline, and the driving circulation of the hydraulic oil is completed.
As shown in fig. 2, the hydraulic motor 5 is installed on a gearbox 6, the gearbox 6 is installed on a front axle of the harvester, an output shaft of the gearbox 6 is connected with a brake disc 7, the brake disc 7 is connected with a wheel reduction gear 9, and a front wheel is installed on the wheel reduction gear 9. The hydraulic motor 5 drives the gearbox 6 to work, the gearbox 6 drives the brake disc 7 to rotate through a gearbox output shaft, and the brake disc 7 drives the wheel-side speed reducer 9 to work so as to drive the front wheel to walk.
Preferably, the brake disc 6 is provided with a brake caliper 8 in a matching manner. The brake disc 6 is braked by the brake caliper 8.
As shown in fig. 3 to 5, a shift mechanism 2.9 is disposed on the hydraulic pump 2, and the shift mechanism 2.9 is used for controlling the flow rate and the flow direction of the hydraulic pump 2. The gear shifting mechanism 2.9 is provided with a gear shifting deflector rod 2.10, the gear shifting deflector rod 2.10 is connected with a gear shifting stay wire 2.15, and the gear shifting deflector rod 2.10 is pulled through the gear shifting stay wire 2.15 to control the gear shifting mechanism 2.9.
Preferably, shift lever 2.10 is articulated to an articulation 2.11. A first hinge hole is formed in the gear shifting rod 2.10, and a second hinge hole corresponding to the first hinge hole is formed in the hinge head 2.11. The articulated shaft is worn to be equipped with in the middle of first hinge hole and the second hinge hole, and then with articulated head 2.11 with shift driving lever 2.10 is articulated together. The end part of the gear shifting pull wire 2.15 is provided with a gear shifting pull rod 2.12, and the gear shifting pull rod 2.12 is connected with the hinged joint 2.11. Furthermore, the number of the first hinge holes 1.71 is more than two, so that the hinge position between the hinge head and the gear shifting deflector rod can be changed or switched conveniently, and the gear shifting precision can be conveniently installed and adjusted.
As shown in fig. 5, a threaded sleeve 2.14 is arranged at the end of the hinged joint 2.11, a threaded rod 2.13 is arranged at the end of the shift pull rod 2.12, the threaded rod 2.13 is in threaded fit in the threaded sleeve 2.14, and the tightness of the shift pull wire 2.15 is adjusted by adjusting the position of the threaded rod 2.13 in the threaded sleeve 2.14, so as to improve the accuracy of shifting.
Preferably, a fixing nut is arranged on the threaded rod 2.13, and the threaded rod 2.13 and the threaded sleeve 2.14 are fixed by the fixing nut, so that the position of the threaded rod 2.13 in the threaded sleeve 2.14 is prevented from changing.
Preferably, the last fixed bolster 2.6 of installing of hydraulic pump 2, be provided with fixed plate 2.8 on the fixed bolster 2.6, be provided with the direction through-hole on the fixed plate 2.8, shift pull rod 2.12 passes the direction through-hole, the diameter of direction through-hole is greater than the diameter of shift pull rod 2.12. The shift rod 2.12 is prevented from tilting or skewing to influence the shifting operation by the guide through hole.
As shown in fig. 2, a gearbox gear shifting mechanism 6.1 is arranged on the gearbox 6, and the gear of the gearbox is changed through the gearbox gear shifting mechanism 6.1 to adjust the walking speed. Still be provided with manual brake mechanism 6.2 on the gearbox 6, directly brake the gearbox through manual brake mechanism 6.2.
As shown in fig. 6 to 9, the hydraulic steering system includes a gear pump 13 and a direction change valve (not shown), and the gear pump 13 is mounted on the engine 1, and the gear pump 13 is operated by the engine 1. The reversing valve is arranged in the cab. And the gear pump 13 is provided with a gear pump oil pumping port 13.1 and a gear pump oil outlet 13.2. The hydraulic oil tank 3 is further provided with a second outlet 3.3 of the hydraulic oil tank, and the second outlet 3.3 of the hydraulic oil tank is connected with the oil inlet 13.1 of the gear pump through a hydraulic oil pipe. The oil outlet 13.2 of the gear pump is connected with a port P of a reversing valve of the reversing valve through a hydraulic oil pipe, and a port T of the reversing valve is connected with an inlet 3.41 of an oil tank filter 3.4 arranged at the top end of a hydraulic oil tank through a hydraulic pipeline. The gear pump 13 pressurizes the hydraulic oil in the hydraulic oil tank 3 and then conveys the pressurized hydraulic oil to the port P of the reversing valve, the port T of the reversing valve returns the hydraulic oil to the oil tank filter 3.4 for filtering, and the hydraulic oil filtered by the oil tank filter 3.4 enters the hydraulic oil tank 3 again.
The hydraulic steering system further comprises a left steering oil cylinder and a right steering oil cylinder 16, one end of each steering oil cylinder 16 is hinged to the rear axle, and the other end of each steering oil cylinder 16 is hinged to the rear wheel. And a steering oil cylinder port A16.1 and a steering oil cylinder port B are arranged on the steering oil cylinder 16.
The reversing valve is provided with a reversing valve port A and a reversing valve port B, the reversing valve port A is connected with an oil inlet of a first steering three-way valve (not shown) through a first steering three-way valve oil inlet pipe 17, and two oil outlets of the first steering three-way valve are respectively connected with steering oil cylinder ports A16.1 of a left steering oil cylinder 16 and a right steering oil cylinder 16. The port B of the reversing valve is connected with an oil inlet of a second steering three-way valve (not shown) through an oil inlet pipe 18 of the second steering three-way valve, and two oil outlets of the second steering three-way valve are respectively connected with ports B16.2 of steering cylinders of a left steering cylinder and a right steering cylinder. The gear pump is independently arranged on the engine to provide high-pressure hydraulic oil for the reversing valve and the steering oil cylinder to adjust the advancing direction, so that the angle of the rear wheel can be more sensitively adjusted, and the stability of adjusting the oil pressure is ensured.
The engine 1 drives the gear pump 13 to work, the gear pump 13 boosts the pressure of the hydraulic oil and provides high-pressure hydraulic oil to the reversing valve from an oil outlet 13.2 of the gear pump, and the hydraulic oil discharged from a T port of the reversing valve flows back to the hydraulic oil tank 3 through the hydraulic oil pipe and the oil tank filter. The port A of the reversing valve and the port B of the reversing valve respectively provide hydraulic oil for the port A16.1 of the steering oil cylinder or the port B16.2 of the steering oil cylinder through hydraulic pipelines, so that power is provided for the steering oil cylinder, the stretching and retracting of the steering oil cylinder are controlled, the angle of a rear wheel is adjusted through the steering oil cylinder, the advancing direction of the harvester is adjusted, and steering is achieved.
The hydraulic brake system comprises an air pump, the air pump is installed on the engine 1 and drives the air pump to work, and the air pump provides power for the hydraulic brake system of the hydraulic traveling system. The air pump is communicated with the high-pressure air storage tank through a first metal pipe, and high-pressure air is added into the high-pressure air storage tank through the air pump. The air pump is directly arranged on the engine, and is used for conveying air into the high-pressure air storage tank, so that an air source is provided for the brake system.
The high-pressure air storage tank is communicated with a pneumatic brake valve through a second metal pipe, the pneumatic brake valve is connected with a relay valve through a third metal pipe, the relay valve is communicated with a brake three-way valve through a brake hose, the brake three-way valve is communicated with a left brake caliper 8 and a right brake caliper 8 through a fourth metal pipe, and the brake calipers 8 are matched with a brake disc 7 for braking.
The pneumatic brake valve is connected with the brake pedal mechanism, and the opening and closing of the pneumatic brake valve are controlled through the brake pedal mechanism. Preferably, the first metal pipe, the second metal pipe, the third metal pipe and the fourth metal pipe can be replaced by pressure-resistant hoses, so that the arrangement of pipelines is further facilitated, and the device is more suitable for the complex space structure of the harvester. Preferably, the relay valve can adopt a quick release valve.
The engine 1 works to drive the air pump to work, and the air pump adds air into the high-pressure air storage tank through the first metal pipe to be used as a high-pressure air source. And the high-pressure gas storage tank provides high-pressure gas for the pneumatic brake valve through a second metal pipe. And the pneumatic brake valve is opened by stepping on the brake pedal mechanism, and high-pressure gas is input to the relay valve through the third metal pipe. The relay valve rapidly conveys high-pressure gas to the three-way valve through the brake hose, the high-pressure gas respectively provides air pressure for the left brake caliper 8 and the right brake caliper 8 through the three-way valve, and the brake calipers 8 drive the two brake pads to be tightly held with the brake disc 7, so that braking is realized.
The invention also provides a hydraulic driving method of the corn harvester, which drives the hydraulic traveling system of the harvester, and the specific driving method is as follows:
step 1, starting an engine 1, wherein the engine 1 drives a hydraulic pump 2, a gear pump 3 and an air pump to work. The hydraulic pump 2 pumps the hydraulic oil in the hydraulic oil tank 3 to the hydraulic pump 2 for pressurization, and high-pressure hydraulic oil is provided for a hydraulic motor A port 5.1 or a hydraulic motor B port 5.2 through a hydraulic pump A port pipe joint 2.2 or a hydraulic pump B port pipe joint 2.3 to drive the hydraulic motor 5 to work; meanwhile, high-temperature hydraulic oil is discharged from the oil outlet pipe joint 2.5 of the hydraulic pump, enters the radiator 10 from the radiator inlet 10.1 through a hydraulic pipeline for heat dissipation and cooling, and the low-temperature hydraulic oil cooled by the radiator flows back to the hydraulic oil tank 3 from the oil return port 3.2 of the hydraulic oil tank through the hydraulic pipeline; meanwhile, the engine 1 drives an air pump to work, the air pump adds air into a high-pressure air storage tank through a first metal pipe to serve as a high-pressure air source, and the high-pressure air storage tank provides high-pressure air to a pneumatic brake valve through a second metal pipe; meanwhile, the gear pump 13 sucks hydraulic oil from the hydraulic oil tank, and provides high-pressure hydraulic oil to the reversing valve from an oil outlet 13.2 of the gear pump after the hydraulic oil is pressurized, and the hydraulic oil discharged from a T port of the reversing valve flows back to the hydraulic oil tank 3 through the hydraulic oil pipe and the oil tank filter;
step 2, a hydraulic pump gear shifting rod in a cab is shifted to pull a gear shifting stay wire 2.15, the gear shifting stay wire 2.15 sequentially drives the gear shifting pull rod, a hinge joint and a gear shifting deflector rod to control a gear shifting mechanism 2.9, the flow and the flow direction of the hydraulic pump 2 are controlled and controlled through the gear shifting mechanism 2.9, the rotation direction and the rotation speed of a hydraulic motor are switched, and the traveling direction and the traveling power of the harvester are further switched;
step 3, a gearbox gear lever in a cab is shifted, a hydraulic motor 5 drives a gearbox 6 to work, the gearbox 6 drives a brake disc 7 to rotate through a gearbox output shaft, the brake disc 7 drives a wheel reduction gear 9 to work so as to drive front wheels to walk, a gearbox gear shifting mechanism 6.1 is adjusted through the gearbox gear lever to change the gear of the gearbox, and the walking speed of a harvester is adjusted;
step 4, rotating a steering wheel to control a reversing valve, wherein an A port of the reversing valve conveys hydraulic oil to an oil inlet of a first steering three-way valve through an oil inlet pipe 17 of the first steering three-way valve, two oil outlets of the first steering three-way valve respectively convey hydraulic oil to a A port 16.1 of a steering oil cylinder of a left steering oil cylinder 16 and a steering oil cylinder of a right steering oil cylinder 16, a B port 16.2 of the steering oil cylinder 16 returns hydraulic oil to an oil outlet of a second steering three-way valve, and an oil inlet of the second steering three-way valve returns hydraulic oil to a B port of the reversing valve to adjust the lengths of the two steering oil cylinders 16 and adjust the direction of a rear wheel in a forward direction; on the contrary, the port B of the reversing valve conveys hydraulic oil to an oil inlet of a second steering three-way valve through an oil inlet pipe 18 of the second steering three-way valve, two oil outlets of the second steering three-way valve respectively convey hydraulic oil to ports B16.2 of the steering cylinders 16 on the left and right, meanwhile, a port a 16.1 of the steering cylinder 16 returns hydraulic oil to an oil outlet of the first steering three-way valve, and an oil inlet of the first steering three-way valve returns hydraulic oil to the port a of the reversing valve so as to reversely adjust the lengths of the two steering cylinders 16 and adjust the direction of the rear wheel;
and step 5, treading the brake pedal mechanism to open the pneumatic brake valve, inputting high-pressure gas into the relay valve through a third metal pipe, rapidly conveying the high-pressure gas to the three-way valve through the brake hose by the relay valve, and respectively providing air pressure for the left brake caliper 8 and the right brake caliper 8 through the three-way valve, so that the two brake pads are driven by the brake caliper 8 to be tightly held with the brake disc 7, and braking of the front wheel is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (1)

1. A hydraulic driving method of a corn harvester is characterized in that: the method is realized based on a hydraulic traveling system of the corn harvester, wherein the hydraulic traveling system comprises a hydraulic driving system, a hydraulic steering system and a hydraulic braking system;
the hydraulic drive system includes: the hydraulic pump type engine comprises an engine (1), a hydraulic pump (2), a hydraulic oil tank (3), a hydraulic motor (5) and a radiator (10), wherein the hydraulic pump (2) is arranged on the engine (1), the hydraulic pump (2) is respectively and simultaneously connected with the hydraulic oil tank (3), the hydraulic motor (5) and the radiator (10), and the radiator (10) is connected with the hydraulic oil tank (3);
the method comprises the following steps: the method comprises the following steps of starting, shifting a hydraulic pump, shifting a gearbox, hydraulically steering and hydraulically braking;
the starting step comprises: the method comprises the following steps that an engine (1) is started, the engine (1) drives a hydraulic pump (2), a gear pump (13) and an air pump to work, the hydraulic pump (2) pumps hydraulic oil in a hydraulic oil tank (3) to the hydraulic pump (2) for pressurization, and high-pressure hydraulic oil is provided for a hydraulic motor A port (5.1) or a hydraulic motor B port (5.2) through a hydraulic pump A port pipe joint (2.2) or a hydraulic pump B port pipe joint (2.3) to drive the hydraulic motor (5) to work;
in the starting step, high-temperature hydraulic oil is discharged from an oil outlet pipe joint (2.5) of the hydraulic pump, enters a radiator (10) from a radiator inlet (10.1) through a hydraulic pipeline for heat dissipation and cooling, and the low-temperature hydraulic oil cooled by the radiator flows back to a hydraulic oil tank (3) from an oil return port (3.2) of the hydraulic oil tank through the hydraulic pipeline;
the hydraulic steering system is used for controlling the direction of the rear wheels so as to change the walking direction of the harvester, the hydraulic steering system comprises a gear pump (13), a reversing valve and a left steering oil cylinder and a right steering oil cylinder (16), the gear pump (13) is installed on an engine (1) and drives the gear pump to work through the engine, a gear pump oil inlet (13.1) and a gear pump oil outlet (13.2) are arranged on the gear pump (13), a hydraulic oil tank second outlet (3.3) is also arranged on the hydraulic oil tank (3), the hydraulic oil tank second outlet (3.3) is connected with the gear pump oil inlet (13.1) through a hydraulic oil pipe, the gear pump oil outlet (13.2) is connected with a reversing valve P port of the reversing valve through a hydraulic oil pipe, a port T of a reversing valve of the reversing valve is connected with an inlet (3.41) of an oil tank filter (3.4) arranged at the top end of a hydraulic oil tank through a hydraulic pipeline, one end of a steering oil cylinder (16) is hinged on a rear axle, the other end of the steering oil cylinder is hinged with a rear wheel, a port A (16.1) and a port B (16.2) of the steering oil cylinder are arranged on the steering oil cylinder (16), a port A and a port B of the reversing valve are arranged on the reversing valve, the port A of the reversing valve is connected with an oil inlet of a first steering three-way valve through an oil inlet pipe (17) of the first steering three-way valve, two oil outlets of the first steering three-way valve are respectively connected with ports A (16.1) of the steering oil cylinders (16) on the left and the right, and the port B of the reversing valve is connected with an oil inlet of a second steering three-way valve through an oil inlet pipe (18) of the second steering three-way valve, two oil outlets of the second steering three-way valve are respectively connected with ports B (16.2) of the steering cylinders on the left and the right;
the hydraulic brake system comprises an air pump, the air pump is mounted on an engine and drives the air pump to work through the engine, the air pump is communicated with a high-pressure air storage tank through a first metal pipe, the high-pressure air storage tank is communicated with a pneumatic brake valve through a second metal pipe, the pneumatic brake valve is connected with a relay valve through a third metal pipe, the relay valve is communicated with a brake three-way valve through a brake hose, the brake three-way valve is communicated with a left brake caliper and a right brake caliper through a fourth metal pipe, the brake calipers are matched with a brake disc to brake, the pneumatic brake valve is connected with a brake pedal mechanism, and the opening and closing of the pneumatic brake valve are controlled through the brake pedal mechanism;
the hydraulic pump (2) comprises a hydraulic pump oil inlet pipe joint (2.1), a hydraulic pump A port pipe joint (2.2), a hydraulic pump B port pipe joint (2.3), a hydraulic pump shell oil return pipe joint (2.4) and a hydraulic pump oil outlet pipe joint (2.5), the hydraulic pump oil inlet pipe joint (2.1) is connected with one end of a first oil inlet pipe (4.1), the other end of the first oil inlet pipe (4.1) is connected with an inlet of a low-pressure oil filter (4.2), an outlet of the low-pressure oil filter (4.2) is connected with one end of a second oil inlet pipe (4.3), the other end of the second oil inlet pipe (4.3) is connected with a first outlet (3.12) of a hydraulic oil tank (3), the hydraulic motor (5) comprises a hydraulic motor A port (5.1), a hydraulic motor B port (5.2) and a motor shell oil return port (5.3), a port A (5.1) of a hydraulic motor is connected with a port A pipe joint (2.2) of a hydraulic pump through a hydraulic pipeline, a port B (5.2) of the hydraulic motor is connected with a port B pipe joint (2.3) of the hydraulic pump through a hydraulic pipeline, an oil return port (5.3) of a motor shell is connected with an oil return pipe joint (2.4) of the hydraulic pump shell through a hydraulic pipeline, a radiator (10) is arranged on one side of a fan of an engine, the radiator (10) is cooled by the fan of the engine, a radiator inlet (10.1) and a radiator outlet (10.2) are arranged on the radiator (10), an oil outlet pipe joint (2.5) of the hydraulic pump is connected with the radiator inlet (10.1) through a hydraulic pipeline, a radiator outlet (10.2) is connected with a hydraulic oil tank oil return port (3.2) on a hydraulic oil tank (3) through a hydraulic pipeline, a hydraulic motor (5) is installed on a gearbox (6), the gearbox (6) is installed on a front axle of the harvester, a gearbox output shaft of the gearbox (6) is connected with a brake disc (7), the brake disc (7) is connected with a wheel-side reducer (9), a front wheel is installed on the wheel-side reducer (9), a gearbox shifting mechanism (6.1) and a hand brake mechanism (6.2) are arranged on the gearbox (6), a shifting mechanism (2.9) is arranged on a hydraulic pump (2), a shifting deflector rod (2.10) is arranged on the shifting mechanism (2.9), the shifting deflector rod (2.10) is hinged and connected with a shifting pull rod (2.12), and the shifting pull rod (2.12) is connected with a shifting pull wire (2.15);
the hydraulic pump gear shifting steps are specifically as follows: a hydraulic pump gear shifting rod in a cab is shifted to pull a gear shifting stay wire (2.15), the gear shifting stay wire (2.15) is used for sequentially driving a gear shifting pull rod (2.12), a hinge joint (2.11) and a gear shifting shift rod (2.10) to control a gear shifting mechanism (2.9), the flow and the flow direction of the hydraulic pump (2) are controlled through the gear shifting mechanism (2.9), the rotation direction and the rotation speed of a hydraulic motor are switched, and the advancing direction and the advancing power of a harvester are further switched;
the gearbox gear shifting steps are as follows: a gearbox gear shifting rod in a cab is shifted, a hydraulic motor (5) drives a gearbox (6) to work, the gearbox (6) drives a brake disc (7) to rotate through a gearbox output shaft, the brake disc (7) drives a wheel-side speed reducer (9) to work so as to drive front wheels to walk, a gearbox gear shifting mechanism (6.1) is adjusted through the gearbox gear shifting rod to change gears of the gearbox, and the walking speed of a harvester is adjusted;
the hydraulic steering step specifically comprises: a steering wheel is rotated to control a reversing valve, an opening A of the reversing valve conveys hydraulic oil to an oil inlet of a first steering three-way valve through an oil inlet pipe (17) of the first steering three-way valve, two oil outlets of the first steering three-way valve respectively convey hydraulic oil to openings A (16.1) of steering cylinders (16) on the left and right, meanwhile, an opening B (16.2) of the steering cylinder (16) returns hydraulic oil to an oil outlet of a second steering three-way valve, and an oil inlet of the second steering three-way valve returns the hydraulic oil to the opening B of the reversing valve so as to adjust the lengths of the two steering cylinders (16) and adjust the direction of a rear wheel in a forward direction; on the contrary, a port B of the reversing valve conveys hydraulic oil to an oil inlet of a second steering three-way valve through an oil inlet pipe (18) of the second steering three-way valve, two oil outlets of the second steering three-way valve respectively convey hydraulic oil to ports B (16.2) of the steering oil cylinders (16) on the left and right, a port A (16.1) of the steering oil cylinder (16) returns hydraulic oil to an oil outlet of the first steering three-way valve, and an oil inlet of the first steering three-way valve returns hydraulic oil to the port A of the reversing valve so as to reversely adjust the lengths of the two steering oil cylinders (16) and reversely adjust the direction of a rear wheel;
the hydraulic braking steps are as follows: the pneumatic brake valve is opened by stepping on the brake pedal mechanism, high-pressure gas is input into the relay valve through a third metal pipe, the relay valve rapidly conveys the high-pressure gas to the three-way valve through the brake hose, the high-pressure gas respectively provides air pressure for the left brake caliper (8) and the right brake caliper (8) through the three-way valve, so that the two brake pads are driven by the brake calipers (8) to be tightly held with the brake disc (7), and the braking of the front wheel is realized;
in the starting step, the air pump adds air into the high-pressure air storage tank through the first metal pipe to serve as a high-pressure air source, and the high-pressure air storage tank provides high-pressure air to the pneumatic brake valve through the second metal pipe;
in the starting step, the gear pump (13) sucks hydraulic oil from a hydraulic oil tank, high-pressure hydraulic oil is supplied to the reversing valve from an oil outlet (13.2) of the gear pump after the hydraulic oil is pressurized, and the hydraulic oil discharged from a T port of the reversing valve flows back to the hydraulic oil tank (3) through a hydraulic oil pipe and an oil tank filter;
a first hinge hole is formed in the gear shifting deflector rod (2.10), a second hinge hole corresponding to the first hinge hole is formed in the hinge head (2.11), and a hinge shaft penetrates through the middle of the first hinge hole and the second hinge hole; a gear shifting pull rod (2.12) is arranged at the end part of the gear shifting pull wire (2.15), and the gear shifting pull rod (2.12) is connected with a hinged joint (2.11); the number of the first hinge holes (1.71) is more than two;
a threaded sleeve (2.14) is arranged at the end part of the hinged joint (2.11), a threaded rod (2.13) is arranged at the end part of the gear shifting pull rod 2.12, the threaded rod (2.13) is in threaded fit in the threaded sleeve (2.14), and the tightness of the gear shifting pull rod (2.15) is adjusted by adjusting the position of the threaded rod (2.13) in the threaded sleeve (2.14);
the threaded rod (2.13) is provided with a fixing nut, the positions of the threaded rod (2.13) and the threaded sleeve (2.14) are fixed through the fixing nut, and the threaded rod (2.13) is prevented from changing in the position of the threaded sleeve (2.14);
install fixed bolster (2.6) on hydraulic pump (2), be provided with fixed plate (2.8) on fixed bolster (2.6), be provided with the direction through-hole on fixed plate (2.8), shift pull rod (2.12) pass the direction through-hole, the diameter of direction through-hole is greater than the diameter of shift pull rod (2.12).
CN202110879141.5A 2021-08-02 2021-08-02 Hydraulic driving method of corn harvester Active CN113442722B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11201278A (en) * 1998-01-12 1999-07-27 Komatsu Ltd Running driving device of hydraulic driving type working vehicle and its control method
JP2007030668A (en) * 2005-07-26 2007-02-08 Iseki & Co Ltd Travelling vehicle
CN201947678U (en) * 2010-12-06 2011-08-31 中国农业机械化科学研究院 Hydraulic travelling device of forage harvester
CN103057535B (en) * 2012-12-19 2015-08-12 三一重工股份有限公司 Pneumatic braking system and be provided with the vehicle of this brake system
CN203681279U (en) * 2014-02-22 2014-07-02 福田雷沃国际重工股份有限公司 Hydrostatic and mechanical combined four-wheel drive transmission device of harvesting machine
CN109109659A (en) * 2018-09-07 2019-01-01 中国铁建重工集团有限公司 Wheeled agricultural machinery and its hydraulic travel system
CN209704951U (en) * 2019-02-25 2019-11-29 厦工(三明)重型机器有限公司 A kind of road roller open type vibratory hydraulic system
CN210196428U (en) * 2019-06-17 2020-03-27 山东萨丁重工有限公司 Shuttle type gear operating mechanism of tractor

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Application publication date: 20210928

Assignee: Hebei Haorui Machinery Manufacturing Co.,Ltd.

Assignor: Hebei Yinghu Agricultural Machinery Co.,Ltd.

Contract record no.: X2024980003724

Denomination of invention: A Hydraulic Drive Method for Corn Harvester

Granted publication date: 20230407

License type: Common License

Record date: 20240329