CN108506252A - Hydraulic control system and tractor - Google Patents
Hydraulic control system and tractor Download PDFInfo
- Publication number
- CN108506252A CN108506252A CN201810542165.XA CN201810542165A CN108506252A CN 108506252 A CN108506252 A CN 108506252A CN 201810542165 A CN201810542165 A CN 201810542165A CN 108506252 A CN108506252 A CN 108506252A
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- switching device
- control system
- brake apparatus
- hydraulic control
- clutch
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 27
- 230000006870 function Effects 0.000 description 17
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/28—Valves specially adapted therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to agricultural machinery technological field more particularly to a kind of hydraulic control system and tractors.The hydraulic control system includes throttling set, switching device, brake apparatus, power output arrangement of clutch and retracting device；Throttling set is conveyed to the hydraulic oil of switching device for throttling；Switching device is used to enable the throttling set for being in connected state and brake apparatus and the power output arrangement of clutch in connected state and retracting device, is switched to that throttling set is connected to power output arrangement of clutch and brake apparatus is connected to retracting device；One-way throttle valve is provided between switching device and brake apparatus；The fluid path flowing that the check valve of one-way throttle valve is used to that switching device to be prevented to flow to brake apparatus；It is provided with accumulator between switching device and power output arrangement of clutch.The tractor includes hydraulic control system.The purpose of the present invention is to provide hydraulic control system and tractors, with excellent control accuracy and lower cost.
Description
Technical field
The present invention relates to agricultural machinery technological field more particularly to a kind of hydraulic control system and tractors.
Background technology
There are two types of pattern, mechanical handling and hydraulic operations for traditional tractor PTO switchings, and the latter can generally be used in 50 horses
The above type of power.For hydraulic operation, high-end type has on a small quantity using electric proportional control system, it can be achieved that good control, but
It is that cost is higher, and needs guarantee system oil cleanliness, maintenance requires high；And use common routine with most of
Switch electromagnetic valve controls, at low cost, but cannot achieve and be precisely controlled.
Therefore, the application provides a kind of new hydraulic control system and tractor regarding to the issue above, and electricity both may be implemented
The control accuracy of ratio control system, and have the advantages that the lower-cost of ordinary tap electromagnetic valve controlling system.
Invention content
The purpose of the present invention is to provide hydraulic control systems, with excellent control accuracy and lower cost.
The present invention also aims to provide tractor, with excellent control accuracy and lower cost.
Based on above-mentioned first purpose, hydraulic control system provided by the invention, including throttling set, switching device, braking
Device, power output arrangement of clutch and retracting device；
The throttling set is conveyed to the hydraulic oil of the switching device for throttling；The retracting device is for recycling
Come from the hydraulic oil of the switching device；
The throttling set, the brake apparatus, the power output arrangement of clutch and the retracting device with it is described
Switching device connects；The switching device be used for enables be in connected state the throttling set and the brake apparatus and
The power output arrangement of clutch in connected state and the retracting device are switched to the throttling set and described dynamic
Power output arrangement of clutch connection and the brake apparatus are connected to the retracting device；
It is provided with one-way throttle valve between the switching device and the brake apparatus；The one-way throttle valve it is unidirectional
The fluid path flowing that valve is used to that the switching device to be prevented to flow to the brake apparatus；
It is provided with accumulator between the switching device and the power output arrangement of clutch.
The optional technical solution of the present invention is that the switching device is used to enable the throttling set in connected state
With the power output arrangement of clutch and the brake apparatus in connected state and the retracting device, it is switched to institute
State that throttling set is connected to the brake apparatus and the power output arrangement of clutch is connected to the retracting device.
The present invention optional technical solution be, the throttling set with for convey hydraulic oil system input interface it
Between be provided with pressure reducing valve.
The optional technical solution of the present invention is that overflow dress is provided between the pressure reducing valve and the system input interface
It sets；
The effluent head of the overflow mechanism is for being connected to lubricating system.
The optional technical solution of the present invention is to be provided between the effluent head of the overflow mechanism and the retracting device
Overflow check valve；
The fluid path flowing that the overflow check valve is used to that the retracting device to be prevented to flow to the overflow mechanism, Yi Jiyong
The overflow mechanism flows to the fluid path flowing of the retracting device when connection reaches predetermined threshold value.
The optional technical solution of the present invention is that the throttling set includes manually controlling or the throttle orifice of Electronic control
Or throttle valve.
The optional technical solution of the present invention is that the accumulator includes the buffering dress of gravity type, spring or gasbag-type
It sets.
The optional technical solution of the present invention is that the switching device is two-position four-way solenoid valve；
The retracting device is fuel tank.
The optional technical solution of the present invention is the one-way throttle being arranged between the switching device and the brake apparatus
Valve replaces with accumulator.
Based on above-mentioned second purpose, tractor provided by the invention includes the hydraulic control system.
Beneficial effects of the present invention：
Hydraulic control system provided by the invention, switching device enable throttling set and braking dress in connected state
It sets and the power output arrangement of clutch in connected state and retracting device, is switched to throttling set and power output clutch
When device is connected to and brake apparatus is connected to retracting device, by throttling set and accumulator cooperation to realize power output
Arrangement of clutch delays binding function, by the check valve and throttle valve quick relief of one-way throttle valve, brake apparatus quick separating,
Its control accuracy is high, relative inexpensiveness.
Tractor provided by the invention, including hydraulic control system, the control accuracy with hydraulic control system is high, at
The advantages that this relative moderate.
Description of the drawings
It, below will be to tool in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Body embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing be some embodiments of the present invention, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, other drawings may also be obtained based on these drawings.
Fig. 1 is the first structure schematic diagram for the hydraulic control system that the embodiment of the present invention one provides；
Fig. 2 is the second structural schematic diagram of the hydraulic control system that the embodiment of the present invention one provides；
Fig. 3 is the third structural schematic diagram for the hydraulic control system that the embodiment of the present invention one provides；
Fig. 4 is the pressure history for the hydraulic control system that the embodiment of the present invention one provides.
Icon：110- throttling sets；120- switching devices；130- brake apparatus；140- power output arrangement of clutch；
150- retracting devices；160- one-way throttle valves；170- accumulators；180- pressure reducing valves；190- system input interfaces；200- overflows
Device；210- lubricating systems；220- overflow check valves；230- accumulators.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described reality
It is a part of the embodiment of the present invention to apply example, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to what the present invention protected
Range.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for the description present invention and simplify description, specific side must be had by not indicating or implying the indicated device or element
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " the
Two ", " third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Embodiment one
Shown in Fig. 1-Fig. 4, a kind of hydraulic control system is present embodiments provided；Fig. 1-Fig. 3 be the present embodiment provides
Hydraulic control system first structure schematic diagram to third structural schematic diagram.Wherein Fig. 2 uses the list of accumulator alternate figures 1
To throttle valve；Fig. 4 is the pressure history of hydraulic control system provided in this embodiment, and C1 is power output arrangement of clutch
Control pressure curve, C2 are brake apparatus control pressure curve.
Hydraulic control system provided in this embodiment is applied to, using the control system of hydraulic pressure switching, especially apply
Switch hydraulic control system in PTO, such as applied to tractor, crane/lift truck, dump truck, Liquid Tank Motor Vehicle or refrigeration
Automobile etc..
Shown in Fig. 1-Fig. 4, the hydraulic control system, including throttling set 110, switching device 120, braking dress
Set 130, power output arrangement of clutch 140 and retracting device 150；
Throttling set 110 is conveyed to the hydraulic oil of switching device 120 for throttling；Throttling set 110 is that one kind is mounted on
Realize that the device of hydraulic oil throttling function, the size of the throttle orifice of throttling set 110 there can be both sides pressure difference directly in fluid pressure line
Connect influence.When the throttling set 110 realizes that pressure oil enters control power output arrangement of clutch 140 in the present embodiment, have one
Fixed cushioning effect.
Retracting device 150 is for recycling the hydraulic oil for coming from switching device 120；
Throttling set 110, brake apparatus 130, power output arrangement of clutch 140 and retracting device 150 are and switching device
120 connections.
Switching device 120 is used to enable throttling set 110 in connected state and brake apparatus 130 and is in and is connected to
The power output arrangement of clutch 140 and retracting device 150 of state, are switched to throttling set 110 and power output arrangement of clutch
140 connections and brake apparatus 130 are connected to retracting device 150；That is, before switching device 120 switches oil circuit, throttling dress
It sets 110 to be connected to brake apparatus 130, power output arrangement of clutch 140 is connected to retracting device 150；Switching device 120 switches
After oil circuit, throttling set 110 is connected to power output arrangement of clutch 140, and brake apparatus 130 is connected to retracting device 150.
By switching device 120 so that hydraulic control system realizes that 130 quick separating of brake apparatus, power output arrangement of clutch 140 are slow
Binding function.Switching device 120 is a kind of Hydraulic system control module, the direction controlling dress for pressure oil in hydraulic system
It sets；The switching device 120 realizes pressure commutation function in the present embodiment, is filled to 140 oil circuit of power output arrangement of clutch and braking
Set the switching between 130 oil circuits.Optionally, switching device 120 is electric control valve, Air control valve or hydraulic control valve
Deng；Optionally, switching device 120 is switch electromagnetic valve；Optionally, switching device 120 is two-position four-way solenoid valve.
One-way throttle valve 160 is provided between switching device 120 and brake apparatus 130；One-way throttle valve 160 it is unidirectional
The fluid path flowing that valve is used to that switching device 120 to be prevented to flow to brake apparatus 130；Namely the check valve of one-way throttle valve 160 is used for
Brake apparatus 130 flows to the fluid path flowing of switching device 120.One-way throttle valve 160 is that one kind is mounted in fluid pressure line, real
The device of existing hydraulic oil one-way throttle function, throttling size can have a direct impact both sides pressure difference.
Accumulator 170 is provided between switching device 120 and power output arrangement of clutch 140.Accumulator 170 is a kind of
Energy savings device, be in due course by the energy conversion in system be compression energy or potential energy, Absorbing hydraulic pulsation, and
Play the change rate for adjusting hydraulic system pressure.
It should be noted that one-way throttle valve 160 is to form throttle valve and check valve parallel combination.
Optionally, one-way throttle valve 160 can use the one-way flow control element of identical function to substitute, including adjustable
Manual or electric control function element.
PTO (full name in English：POWER TAKE OFF) device, also known as auxiliary power output device, power takeoff are will to send out
The device that the power of motivation is exported to the equipment other than vehicle running gear.For example, the body dumping mechanism of dump truck, lifting lifting
The agricultural equipment etc. of the jack machinism of automobile, the pump of Liquid Tank Motor Vehicle, the refrigeration equipment of cold storage truck, tractor.
Optionally, power output arrangement of clutch 140 includes but not limited to PTO clutch (also known as PTO
clutch)。
Hydraulic control system described in the present embodiment, switching device 120 enable the throttling set 110 in connected state
With brake apparatus 130 and the power output arrangement of clutch 140 in connected state and retracting device 150, it is switched to throttling dress
110 are set to be connected to power output arrangement of clutch 140 and when brake apparatus 130 is connected to retracting device 150, pass through the dress that throttles
Set 110 and accumulator 170 cooperation to realize that power output arrangement of clutch 140 delays binding function, pass through one-way throttle valve 160
Check valve and throttle valve quick relief, 130 quick separating of brake apparatus, control accuracy is high, relative inexpensiveness.
In the alternative of the present embodiment, switching device 120 is used to enable the throttling set 110 for being in connected state and moves
Power exports arrangement of clutch 140 and the brake apparatus 130 in connected state and retracting device 150, is switched to throttling set
110 are connected to and power output arrangement of clutch 140 is connected to retracting device 150 with brake apparatus 130.That is, switching device
Before 120 switching oil circuits, throttling set 110 is connected to power output arrangement of clutch 140, brake apparatus 130 and retracting device
150 connections；After switching device 120 switches oil circuit, throttling set 110 is connected to brake apparatus 130, power output clutch dress
140 are set to be connected to retracting device 150.
One-way throttle valve 160 when realizing that pressure oil carries out brake apparatus 130, brake at a slow speed by realization in the present embodiment, and
When needing to release braking, the function of quick separating can be realized.
Hydraulic control system described in the present embodiment, switching device 120 enable 110 He of throttling set in connected state
Brake apparatus 130 and power output arrangement of clutch 140 in connected state and retracting device 150 are switched to throttling set
110 are connected to and brake apparatus 130 is connected to retracting device 150 with power output arrangement of clutch 140, pass through throttling set 110
Coordinate to realize that power output arrangement of clutch 140 delays binding function with accumulator 170, passes through the check valve of one-way throttle valve 160
With throttle valve quick relief, 130 quick separating of brake apparatus；And switching device 120 enables the throttling in connected state fill
Set 110 and power output arrangement of clutch 140 and brake apparatus 130 in connected state and retracting device 150 be switched to section
Stream device 110 is connected to brake apparatus 130 and power output arrangement of clutch 140 is connected to retracting device 150, passes through throttling
Device 110 and the cooperation of one-way throttle valve 160 pass through 170 fast quick-release of accumulator to realize the function of 130 slow application of brake apparatus
Power is bled off pressure to realize 140 fast separation function of power output arrangement of clutch.The hydraulic control system has compared with high control precision, can
With in actual operation, realize power output arrangement of clutch 140 it is slow combine, fast separation and the slow application of brake apparatus 130,
Fast separation function；Prevent because quickly in conjunction with the impact generated due to there is the having some setbacks of work, human body generated uncomfortable, prevent
The problem of temporary impact is likely to occur off-axis by transmission shaft, and maintain the contamination resistance under suitable functional conditions and be better than
The characteristics of electric proportional valve control system.
(the present embodiment refers to the PTO switching controls system of electric proportional hydraulic control valve to existing installation electric proportional control system
System), electric proportional control valve control accuracy is high, to control strategy requirement height, it can be achieved that the ratio control of PTO handover control systems
System variation, higher price, contamination resistance are relatively weak；If using independent hydraulic control system, cost higher.And lead to
It often may be selected to realize the electric proportional control system function using the oil return circuit of tractor steering system, especially for tractor
It is the Multipurpose hydraulic oil system shared with transmission system, Hydraulic system cleanliness control is required of high cost, and system maintenance is wanted
It asks tightened up, is otherwise susceptible to catching phenomenon, there are more serious hidden danger, stability and reliability are relatively low.
Existing installation ordinary tap electromagnetic valve controlling system, switch electromagnetic valve control signal is simple, and cost is more low
It is honest and clean, contamination resistance be better than electric proportional control valve, not exigent control strategy, be only used for realize PTO it is quick combine with
It disconnects, precision is unable to control, and the starting impact for occurring more serious at work can not be avoided, to drive system structure part material
The high requirements such as matter, manufacturing process.
PTO executing agencies braking in the prior art uses mechanical mechanism substantially, is gone to and is stopped operation by working condition
Afterwards, manual operation realizes that braking function, intelligence degree are relatively low.
Hydraulic control system described in the present embodiment, it is comprehensive in conjunction with the advantages of electric proportional control system and ordinary tap solenoid valve
The good contamination resistance of combination switch solenoid valve, price is more cheap, while can realize again and be similar to electric proportional control system
The control accuracy that control strategy is reached, realize PTO switching control system, and PTO stop operation need braking when,
Automatically it realizes the function, realizes PTO intelligent controls.The core of the present embodiment be to provide one kind have action ride comfort it is good, anti-
Dirty ability is by force and high-precision PTO switches hydraulic control system.
In the alternative of the present embodiment, throttling set 110 with for convey hydraulic oil system input interface 190 it
Between pipeline on be provided with pressure reducing valve 180.By pressure reducing valve 180 more continual and steady pressure is provided for hydraulic control system
Hydraulic oil；Optionally, pressure reducing valve 180 is to provide required setup pressure value for the follow-up system of hydraulic control system.
It is shown in Figure 3, in the alternative of the present embodiment, it is provided between pressure reducing valve 180 and system input interface 190
Overflow mechanism 200；Overflow mechanism 200 plays the safe valve action of hydraulic control system, so that the input oil pressure of hydraulic control system
With opposite steady pressure value, and protect the safety of hydraulic control system.
The effluent head of overflow mechanism 200 is for being connected to lubricating system 210, so that extra hydraulic oil lubricates for PTO.
Optionally, overflow mechanism 200 includes overflow valve.
It is shown in Figure 3, in the alternative of the present embodiment, the effluent head of overflow mechanism 200 and retracting device 150 it
Between be provided with overflow check valve 220；
The fluid path flowing that overflow check valve 220 is used to that retracting device 150 to be prevented to flow to overflow mechanism 200, and for connecting
Overflow mechanism 200 flows to the fluid path flowing of retracting device 150 when leading to predetermined threshold value.By overflow check valve 220, so that
The fluid path that overflow mechanism 200 flows to retracting device 150 sets up certain back pressure value so that fluid is enough to pass through PTO lubrication managements
Road ensures 210 works fine of PTO lubricating systems.
Optionally, overflow check valve 220 is pressure check valve.When the Opening pressure of overflow check valve 220 reaches certain
When pressure, the connection of one-way flow channel.
In the alternative of the present embodiment, throttling set 110 includes manually controlling or the throttle orifice or section of Electronic control
Flow valve.
In the alternative of the present embodiment, buffer unit of the accumulator 170 including gravity type, spring or gasbag-type,
Or other buffer units.
In the alternative of the present embodiment, retracting device 150 is fuel tank.
It is shown in Figure 2, in the alternative of the present embodiment, it is arranged between switching device 120 and brake apparatus 130
One-way throttle valve 160 replaces with accumulator 230.By the cooperation of accumulator 230 and throttling set 110, so that brake apparatus
130 have slow application, fast separation function.
In the alternative of the present embodiment, the hydraulic control system includes valve block and relevant connection element；Valve block and phase
Connecting element is closed such as comprising valve block, erection joint, hydralic hose.It is completed by the entire hydraulic control system of hydralic hose
Oil circuit is connected.
It is illustrated below in order to more be apparent from the present embodiment：
Shown in Figure 4, curve C1 (without curve of triangle) is the control pressure of power output arrangement of clutch 140 in figure
Force curve, curve C2 (curve for carrying triangle) is 130 control pressure curve of brake apparatus.
Initially, switching device 120 (such as switch electromagnetic valve) is in power failure state, the pressure oil warp of hydraulic control system
Pressure reducing valve 180 flows through throttling set 110,120 runner of switching device be 2. → 3., arrive brake apparatus through one-way throttle valve 160
130, under the double action of throttling set 110 and the throttle valve of one-way throttle valve 160, hydraulic pressure is applied to brake apparatus 130
Power；And another oil circuit by power output arrangement of clutch 140,170 oil duct of accumulator to switching device 120 4. → 1., led to by sebific duct
Huis receiving apparatus 150 (such as fuel tank).Ideally, according to Pascal's theorem, when pressure oil acts on brake apparatus 130
On, the leakage factor of hydraulic system is not considered, theoretically after pressure reducing valve 180 there is no the flowing of pressure oil, after pressure reducing valve 180
Pressure keeps corresponding setting value, compresses brake apparatus 130；Power output arrangement of clutch 140 is communicated with retracting device 150, is stored
Energy 170 pressure of device discharges completely, and the pressure value in pipeline that is connected is minimum.Thus when stablizing, pressure change is shown in region A1 in Fig. 4,
Executive device is in on-position, and power output arrangement of clutch 140 is in discrete state.
When switching device 120 obtains electric, spool fast switching action, pressure oil flow direction changes, and generates flowing, 2. →
4. oil duct is connected, 3. → 1. oil duct connection.At this point, system pressure oil through pressure reducing valve 180 2. → 4. with power output arrangement of clutch
140 are connected.Two passage aisles of check valve and throttle valve of hydraulic oil through one-way throttle valve 160 quickly unload in brake apparatus 130
Lotus, brake apparatus 130 quickly unclamp, and reflect that the curve C2 brake pressure fast steps of region A2 in Fig. 4 decline.Through throttling
After device 110 pressure oil enter power output arrangement of clutch 140 control oil circuit, propulsion power export arrangement of clutch 140 from
It closes piece slowly to compress, while 170 absorption pressure energy of accumulator, reflects the curve C1 power output clutches dress of region A2 in Fig. 4
The one small end steady pressure constant interval of control pressure curve leading portion for setting 140, is compressed as air bag is synchronous with clutch-plate,
Pressure steps up, and the slope of the control pressure of the curve C1 power outputs arrangement of clutch 140 of region A2 is increasing in Fig. 4,
Illustrate that since clutch-plate trackslipping in hydraulic control system, the action of power output arrangement of clutch 140 gradually accelerates, complete to the end
It is complete to be combined together completely, the shock problem of starting is reduced very well, and there is good ride comfort.
What region A3 reflected in Fig. 4, which is switching device 120 (such as switch electromagnetic valve), must persistently charge down, power output
The clutch-plate of arrangement of clutch 140 is completely combined, continue working, and brake apparatus 130 completely disengages, system stable operation.
When 120 dead electricity of switching device, spool fast switching action, pressure oil flow direction changes, and generates flowing.At this point,
Power output arrangement of clutch 140 through switching device 120 4. → 1. oil duct, communicated with retracting device 150, power output clutch dress
140 hydraulic control quick reliefs are set, the control pressure curve of the curve C1 power outputs arrangement of clutch 140 of region A4 is reflected in
Step decrease, power output arrangement of clutch 140 control quick separating.At the same time, system pressure oil is through pressure reducing valve 180, by cutting
Changing device 120 2. → 3. oil duct influenced to one-way throttle valve 160 by one-way throttle, brake apparatus 130 realize delay braking work
Can, reflect the curve C2 brake pressure curvilinear motion processes of region A4 in Fig. 4.
The present embodiment can advise by adjusting different models such as throttling set 110, one-way throttle valve 160, accumulators 170
Lattice are realized and are more accurately controlled under different requirements.
Embodiment two
Embodiment two provides a kind of tractor, which includes the hydraulic control system described in embodiment one, implements
The technical characteristic of hydraulic control system disclosed in example one is also applied for the embodiment, one published hydraulic control of embodiment
The technical characteristic of system is not repeated to describe.
Tractor provided in this embodiment, including hydraulic control system；Control accuracy with hydraulic control system is high,
The advantages that relative inexpensiveness.
Tractor described in the present embodiment has the advantages that hydraulic control system described in embodiment one, one institute of embodiment are public
The advantages of hydraulic control system opened, is not repeated to describe herein.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；
Although present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：Its
It still can be either special to which part or whole technologies with technical scheme described in the above embodiments is modified
Sign carries out equivalent replacement；And these modifications or replacements, various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (10)
1. a kind of hydraulic control system, which is characterized in that including throttling set, switching device, brake apparatus, power output clutch
Device and retracting device；
The throttling set is conveyed to the hydraulic oil of the switching device for throttling；The retracting device comes from for recycling
The hydraulic oil of the switching device；
The throttling set, the brake apparatus, the power output arrangement of clutch and the retracting device with the switching
Device connects；The switching device is used to enable the throttling set for being in connected state and the brake apparatus and in company
The power output arrangement of clutch and the retracting device of logical state, be switched to the throttling set and the power output from
Attach together set connection and the brake apparatus be connected to the retracting device；
It is provided with one-way throttle valve between the switching device and the brake apparatus；The check valve of the one-way throttle valve is used for
The switching device is prevented to flow to the fluid path flowing of the brake apparatus；
It is provided with accumulator between the switching device and the power output arrangement of clutch.
2. hydraulic control system according to claim 1, which is characterized in that the switching device is in connected state for enabling
The throttling set of state and the power output arrangement of clutch and the brake apparatus in connected state and described time
Receiving apparatus is switched to the throttling set and is connected to the brake apparatus and the power output arrangement of clutch and the recycling
Device is connected to.
3. hydraulic control system according to claim 1, which is characterized in that the throttling set with for conveying hydraulic oil
System input interface between be provided with pressure reducing valve.
4. hydraulic control system according to claim 3, which is characterized in that the pressure reducing valve and the system input interface
Between be provided with overflow mechanism；
The effluent head of the overflow mechanism is for being connected to lubricating system.
5. hydraulic control system according to claim 4, which is characterized in that the effluent head of the overflow mechanism and described time
Overflow check valve is provided between receiving apparatus；
The fluid path flowing that the overflow check valve is used to that the retracting device to be prevented to flow to the overflow mechanism, and for being connected to
The overflow mechanism flows to the fluid path flowing of the retracting device when reaching predetermined threshold value.
6. hydraulic control system according to claim 1, which is characterized in that the throttling set include manually control or
The throttle orifice or throttle valve of Electronic control.
7. hydraulic control system according to claim 1, which is characterized in that the accumulator includes gravity type, spring
Or the buffer unit of gasbag-type.
8. hydraulic control system according to claim 1, which is characterized in that the switching device is two-position four-way electromagnetism
Valve；
The retracting device is fuel tank.
9. hydraulic control system according to claim 1, which is characterized in that the switching device and the brake apparatus it
Between the one-way throttle valve that is arranged replace with accumulator.
10. a kind of tractor, which is characterized in that including claim 1-9 any one of them hydraulic control systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542165.XA CN108506252A (en) | 2018-05-30 | 2018-05-30 | Hydraulic control system and tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542165.XA CN108506252A (en) | 2018-05-30 | 2018-05-30 | Hydraulic control system and tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108506252A true CN108506252A (en) | 2018-09-07 |
Family
ID=63401936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810542165.XA Pending CN108506252A (en) | 2018-05-30 | 2018-05-30 | Hydraulic control system and tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108506252A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654130A (en) * | 2018-12-27 | 2019-04-19 | 雷沃重工股份有限公司 | A kind of wet type PTO solenoid valve block and its control method, full-vehicle control unit |
| CN110242624A (en) * | 2019-07-17 | 2019-09-17 | 雷沃重工股份有限公司 | A kind of clutch and brake switching hydraulic system and its control method |
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| CN202824153U (en) * | 2012-07-25 | 2013-03-27 | 中色科技股份有限公司 | Hydraulic control system for prestress oil cylinder of aluminum tape cast rolling machine |
| CN203461743U (en) * | 2013-08-01 | 2014-03-05 | 辽宁瑞丰专用车制造有限公司 | Rotary hydraulic system of crane |
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| CN107264498A (en) * | 2017-05-27 | 2017-10-20 | 徐工集团工程机械股份有限公司科技分公司 | It is a kind of that there is the electrichydraulic control hand brake system for exporting oil sources |
| CN208252457U (en) * | 2018-05-30 | 2018-12-18 | 雷沃重工股份有限公司 | Hydraulic control system and tractor |
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| JPH07332301A (en) * | 1994-06-06 | 1995-12-22 | Kubota Corp | Pressure rising control device of hydraulic clutch |
| JP2003042186A (en) * | 2001-07-31 | 2003-02-13 | Aisin Chem Co Ltd | Wet clutch device |
| CN101907165A (en) * | 2009-06-08 | 2010-12-08 | 爱信精机株式会社 | The hydraulic supply unit of automatic transmission |
| CN202824153U (en) * | 2012-07-25 | 2013-03-27 | 中色科技股份有限公司 | Hydraulic control system for prestress oil cylinder of aluminum tape cast rolling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654130A (en) * | 2018-12-27 | 2019-04-19 | 雷沃重工股份有限公司 | A kind of wet type PTO solenoid valve block and its control method, full-vehicle control unit |
| CN109654130B (en) * | 2018-12-27 | 2020-02-04 | 雷沃重工股份有限公司 | Wet-type PTO electromagnetic valve set, control method thereof and whole vehicle control unit |
| CN110242624A (en) * | 2019-07-17 | 2019-09-17 | 雷沃重工股份有限公司 | A kind of clutch and brake switching hydraulic system and its control method |
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