CN107013513A - The apparatus for controlling of lifting of working rig - Google Patents
The apparatus for controlling of lifting of working rig Download PDFInfo
- Publication number
- CN107013513A CN107013513A CN201611220310.XA CN201611220310A CN107013513A CN 107013513 A CN107013513 A CN 107013513A CN 201611220310 A CN201611220310 A CN 201611220310A CN 107013513 A CN107013513 A CN 107013513A
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- CN
- China
- Prior art keywords
- valve
- cylinder
- manifold
- working rig
- oil circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
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- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
Abstract
A kind of apparatus for controlling of lifting of working rig, it is by lift cylinder；For the directional control valve for the supply/discharge for controlling the pressure oil in the lift cylinder；And constituted built with direction control valve and with the valve casing as pumping hole, the opening portion of reservoir port and cylinder mouthful, provided with the manifold being clipped between cylinder of the valve casing mouthful and the hoist cylinder and the electromagnet cut off valve for being installed on the manifold in the apparatus for controlling of lifting of the working rig.Pump/fuel tank side oil circuit and cylinder side oil circuit are formed with the manifold, what the end of the pump/fuel tank side oil circuit was open is partially attached to the opening portion as the cylinder mouthful of the valve casing, thus be installed on to the manifold disassembly ease valve casing.
Description
Technical field
The present invention relates to the apparatus for controlling of lifting for the working rig for being equipped on saddle type rice transplanter etc..
Background technology
In the past, saddle type rice transplanter included：Vehicle body；The working rig (transplanting portion) at the rear portion of the vehicle is installed on, is made
Industry equipment is standby：Seedling carrying stand, transplanting pawl, the output for the engine by vehicle is equipped on pass to seedling carrying stand, transplanting pawl and inserted
Plant speed changer etc..Be provided with the rear portion of vehicle and rotated upwardly and downwardly the link mechanism of pivot suspension freely, working rig with via
The mode that the link mechanism can be lifted is installed in vehicle.
The amount of movement (i.e. the telescopic moving amount of piston rod) for the piston that link mechanism passes through lift cylinder is rotated upwardly and downwardly, and is
The work of the piston of the hydraulic cylinder is controlled, is configured to the hydraulic circuit as disclosed in Japanese Unexamined Patent Publication 62-198907 publications
System.The hydraulic circuit system possesses：Directional control valve (guiding valve), for selecting any one in following three setting state,
That is, the oil of oil, discharge from lift cylinder is supplied to lift cylinder, stops oily supply/discharge of lift cylinder.
Direction control valve is main in the switching of following three position, i.e. for supplying oil to lift cylinder and making lift arm
The lifting position rotated is risen, oil is discharged from lift cylinder and is made down position and stop supplying to lift cylinder that lift arm declines
The oil of oil and discharge from lift cylinder and the neutral position for stopping lift arm, directional control valve are exerted a force towards down position.
Oil circuit between directional control valve and lift cylinder is provided with manually operable stop valve, for example, in order to take
Formula rice transplanter is put in storage and working rig is increased, and directional control valve is set into neutral position in the state of rising, thus working rig
Maintain the position.Before rice transplanting operation process terminates, meets next season, in long-term keeping in the case of storehouse,
It is manually operated to close stop valve, the working rig stopped under propradation is thus reliably held at the position.
The content of the invention
Problem to be solved by this invention
But, because the stop valve is manually operated, therefore, it is located at neutral position in directional control valve after rising
Afterwards, easily forget close the stop valve situation, in the case where forgetting closing, when should be sealed in lift cylinder and
Oil between directional control valve, when having pressure under the Gravitative Loads of working rig, oil is between directional control valve and valve casing
Minim gap is leaked towards reservoir port side, easily occurs the unexpected decline of working rig.Particularly, held in working rig carrying weight etc.
In the state of big load, the natural decline of working rig when forgetting to close stop valve is readily occurred in.
The solution used to solve the problem
The apparatus for controlling of lifting of working rig involved in the present invention, possesses：
The hoist cylinder of working rig lifting, the supply pressure oil when rising working rig, when declining working rig
Discharge pressure oil；
Directional control valve, supply/discharge of the pressure oil for controlling the hoist cylinder；And
Valve casing, built with direction control valve, and with pumping hole, reservoir port and cylinder mouthful.
The problem of apparatus for controlling of lifting is in order to solve described, with following technical characteristic.
Possess：Manifold, is clipped between cylinder of the valve casing mouthful and the hoist cylinder.
Pump/fuel tank side oil circuit and cylinder side oil circuit are formed with the manifold.
Cylinder mouthful that what the end of the pump of the manifold/fuel tank side oil circuit was open be partially attached to the valve casing, and dismount
The valve casing is installed on freely.
The open end of the cylinder side oil circuit of the manifold can be connected to the hoist cylinder.
Electromagnet cut off valve is installed in the manifold.
The electromagnet cut off valve is under its solenoidal non-excited state as only allowing from the pump/fuel tank side of the manifold
Oil circuit plays a role to the check valve of the oily flowing of the cylinder side oil circuit.
The pump/fuel tank side the oil circuit and the cylinder side oil circuit that can make oil in the manifold are under the solenoidal excited state
Between the valve opening state that two-way circulates.
Moreover, the directional control valve is can be set in the composition of following any position, i.e., for the hydraulic pressure lift
Cylinder supply pressure oil lifting position, for from the hoist cylinder discharge pressure oil down position, for stopping the hydraulic pressure
The neutral position of supply/discharge of the pressure oil of lift cylinder.
Only when direction control valve is set in into the down position, the solenoid of the electromagnet cut off valve is with being somebody's turn to do
The operation instrument of directional control valve, which is interlocked, to be linked, to carry out excitation.
Invention effect
Only by built with for controlling the directional control valve to working rig lifting hoist cylinder supply pressure oil
Valve casing, the electromagnet cut off valve that can be automatically controlled is installed via manifold disassembly ease, with regard to working rig can be simply formed
Apparatus for controlling of lifting, the apparatus for controlling of lifting of the working rig can reliably prevent the work when working rig is set in into halted state
The unexpected decline of industry machine.
Further, since the cylinder mouthful of valve casing had been part for installing manually operable stop valve in the past, and therefore, electromagnetism
Stop valve possesses the manifold that can be connected to the part, thus seeks modularization, due to without equipping electromagnet cut off valve, energy in valve casing
With the apparatus for controlling of lifting of inexpensive fabrication process machine, therefore conventional stop valve is installed to replace electromagnet cut off valve, moreover it is possible to letter
Singly it is changed to the apparatus for controlling of lifting of existing working rig.
In this way, a kind of apparatus for controlling of lifting of the working rig of excellent cost performance can be provided.
In addition, by the way that electromagnet cut off valve is configured to：It is used as and is only allowed from the manifold under solenoidal non-excited state
The pump/fuel tank side oil circuit played a role to the check valve of the oily flowing of the cylinder side oil circuit, if utilizing this non-excitation shape
State, then in the state of the lifting for the machine of stopping operation is set as, can play a role as stop valve, reliably stop from hydraulic pressure
Oily flowing of the lift cylinder towards directional control valve.
Then, only when directional control valve is set into down position, the solenoid of electromagnet cut off valve is just made to carry out excitation,
Thus, when the directional control valve of the lifting for the machine that should stop operation is set into neutral position, solenoid is non-excitation, as above institute
State, electromagnet cut off valve plays a role automatically as stop valve, can reliably prevent from hoist cylinder towards directional control valve
Oily leakage, the unexpected decline of working rig can be prevented, also, only when directional control valve is set into down position, carry out
Solenoidal excitation, thus, it is possible to suppress power consumption, even in this aspect, can provide the elevating control of the working rig of excellent cost performance
Device.
Brief description of the drawings
Fig. 1 is the hydraulic circuit diagram for possessing the valve gear of the present invention.
Fig. 2 is the stereogram of the valve gear.
Fig. 3 is the top view of the valve gear.
Fig. 4 is Fig. 3 IV-IV lines to pseudosection.
Fig. 5 is off the main view profile of valve.
Fig. 6 is Fig. 4 line VI -- VI to pseudosection.
Fig. 7 be using solenoid as the electromagnet cut off valve under the closed valve state of non-excitation major part profile.
Fig. 8 be using solenoid as the electromagnet cut off valve under the valve opening state of non-excitation major part profile.
Fig. 9 is the major part profile of the electromagnet cut off valve under the initial valve opening state by solenoid excitation.
Figure 10 is the major part profile of the electromagnet cut off valve under the complete valve opening state by solenoid excitation.
Embodiment
By Fig. 1, the working rig elevating control of the valve gear 10 with the present invention is said with the construction of hydraulic circuit
It is bright.
The saddle type rice transplanter of diagram is being omitted, provided with carrying out pivot in the way of it can rotate upwardly and downwardly by pivot suspension axle 1a
The working rig lifting lift arm 1 of supporting, the top of the piston rod 3 of lift cylinder 2 is linked with the pivot of lift arm 1.
Lift cylinder 2 is single-lift hydraulic cylinder, and when supplying oil to the grease chamber 2a of lift cylinder 2, piston rod 3 extends, and makes lifting
Arm 1 is rotated upward, working rig (the transplanting portion for including seedling carrying stand) is increased；When from grease chamber 2a tapped oils, piston rod 3 is received
Contracting, makes lift arm 1 rotate downwards, declines working rig.
It should be noted that in the case of rice transplanter, the control-rod of working rig lifting is configured near driver's seat
Etc. operation instrument, when being travelled on ridge steering or road is carried out, in order that working rig rises, and by operating the operation instrument, control
The telescopic moving amount (rotating upwardly and downwardly for lift arm 1) of the piston rod 3 of lift cylinder 2 processed.
In addition, during operation traveling is carried out, for the purpose of height to adjust working rig etc., sometimes according to being equipped on operation
The earth contact pressure of the rice transplanter kickboard of machine, automatically controls the telescopic moving amount of the piston rod 3 of lift cylinder 2.
In order to carry out the elevating control of this working rig, the valve gear of the apparatus for controlling of lifting of the working rig of the present invention is used as
10, control come free rice transplanter engine E driving hydraulic pump P discharge oil to lift cylinder 2 grease chamber 2a supply and from
Grease chamber 2a discharge.
Valve gear 10 possesses：Pumping hole 10p, reservoir port 10t and cylinder mouthful 10c, via oil circuit (pressure oil pipe) L1 by pumping hole
10p is connected to hydraulic pump P outlet, is connected to reservoir port 10t via oil circuit (pressure oil pipe) L2 and is for example used as rice transplanter
Speed changer in oil groove etc. fuel tank T, cylinder mouthful 10c is connected to the grease chamber 2a of lift cylinder 2 via oil circuit (pipe arrangement) L3.
Valve gear 10 is illustrated by Fig. 1 to Fig. 6.Valve gear 10 has valve casing 11, in valve casing 11, built with pressure
Power regulation overflow valve 15, flow control valve 16, directional control valve 20 and variable throttle valve 25.In addition, in order to carry out direction
The pipe arrangement connection of lift cylinder 2, electromagnet cut off valve 30 is provided with the manifold 40 for being placed on valve casing 11.
Possess as the directional control valve 20 of guiding valve：Shoulders, respectively to being formed at pump path 20p, the fuel tank of valve casing 11
Path 20t, cylinder path 20c and path 20r are opened and closed.
Pump oil road 11a is formed with the way of extending from pump path 20p in valve casing 11, by the lateral surface of valve casing 11
Pump oil road 11a open end as valve casing 11 pumping hole 11p.
Pipe joint 12 is installed in the open end of the pump oil road 11a as pumping hole 11p, passes through the pumping hole of valve casing 11
11p and the valve gear 10 shown in the pie graph 1 of pipe joint 12 pumping hole 10p.
Pipe joint 12 is connected with the pressure oil pipe as the oil circuit L1 shown in Fig. 1.In addition, being provided with Fig. 1 in pipe joint 12
Shown in-line filter 13, the oil from the pressure oil pipe as oil circuit L1 is filtered by in-line filter 13, is flowed into
In the 11a of pump oil road.
In valve casing 11, pump oil road 11a is connected with pressure regulation overflow valve 15 and flow control valve 16, from being used as pump
Mouth 10p pipe joint 12 flows into the pump oil road 11a oil of the discharge from hydraulic pump 11, is carried out by pressure regulation with overflow valve 15
After pressure regulation, Flow-rate adjustment is further carried out by flow control valve 16, supplied to the pumping hole 20p of directional control valve 20
Give.
In addition, in valve casing 11, with pressure regulation the overflow passage 15a of overflow valve 15 and flow control valve 16
The mode that overflow passage 16a is collaborated, is formed with the tank oiling channel oil 11b extended from fuel tank path 20t, by the outer of valve casing 11
Sideways the tank oiling channel oil 11b of (being in the present embodiment pumping hole 11p opposite side) open end as valve casing 11 reservoir port
11t。
Pipe joint 14 is equipped with the open end insertion of the tank oiling channel oil 11b as reservoir port 11t, passes through valve casing 11
Reservoir port 11t and the pie graph 1 of pipe joint 14 shown in valve gear 10 reservoir port 10t.Pipe joint 14 is connected with as Fig. 1
Shown oil circuit L2 pressure oil pipe.
In addition, being formed with valve casing 11 for by from oil of the path 20r Jing Guo variable throttle valve 25, to tank oiling channel oil
The oil circuit 11r of 11b conveyings.
Moreover, being formed with the cylinder oil circuit 11c extended from cylinder path 20c in valve casing 11, its open end is regard as valve
The cylinder mouthful 11d of shell 11.
Moreover, the hydraulic control oil circuit 11e from cylinder oil circuit 11c to the branch of flow control valve 16 is formed with valve casing 11, in side
To transitional period of the control valve 20 from neutral position to lifting position, when the control valve 20 is limited the flow to cylinder mouthful 10c
When, the flow control valve 16 that should discharge its remaining oil is opened and closed.
Electromagnet cut off valve 30 is installed via manifold 40 is external in valve casing 11.
Manifold 40 is internally formed the valve chamber 43 for the check valve assembly 50 for accommodating electromagnet cut off valve 30 at it, in addition, via
Valve chamber 43 forms the pump/fuel tank side oil circuit 42 and cylinder side oil circuit 44 of rectangular direction connection each other.
Using the open end of pump/fuel tank side oil circuit 42 as manifold 40 pump/reservoir port 41.Pump/the reservoir port will be used as
Thus electromagnet cut off valve 30 is installed on valve by the end insertion of 41 manifold 40 as the cylinder mouthful 11d of valve casing 11 open end
Shell 11, in addition, connecting pump/fuel tank side oil circuit 42 in the cylinder oil circuit 11c and manifold 40 in valve casing 11.
On the other hand, using the open end of cylinder side oil circuit 44 as manifold 40 cylinder mouthfuls 45, in opening as cylinder mouthful 45
Mouth end is embedded with pipe joint 17, passes through the cylinder of the valve gear 10 shown in the cylinder mouthful 45 and the pie graph 1 of pipe joint 17 of manifold 40
Mouth 10c.Pipe joint 17 is connected with the pressure oil pipe as the oil circuit L3 shown in Fig. 1.In addition, being provided with Fig. 1 institutes in pipe joint 17
The in-line filter 18 shown.
Then, by Fig. 1 and Fig. 6 etc., the directional control valve 20 of valve gear 10 is described in detail.
Directional control valve 20 possesses guiding valve 21, guiding valve 21 by the movement of its axis direction, switch to lifting position U, in
Vertical position N, down position D.
Guiding valve 21 is exerted a force by the spring 22 that winding is assemblied in the guiding valve 21 towards down position D.In down position D, guiding valve
21 by the shoulder located at its periphery, connects pump path 20p and fuel tank path 20t, the suction oil from pumping hole 10p is not flowed
Circulated to cylinder path 20c, and with reservoir port 10t, and connect cylinder path 20c and path 20r, by from the grease chamber 2a of lift cylinder 2
Cylinder path 20c oil is flowed into, reservoir port 10t is expelled to via variable throttle valve 25.
It should be noted that choke valve 25 is by limiting the flow velocity from cylinder path 20c to discharge oil circuit 11b, and with suppression
The function of the speed for the lift arm 1 to be declined by deadweight is made, but in addition, is located in guiding valve 21 from neutral position N under
Decrease is put in the state of the throttling down position Da of D transition midway, in guiding valve 21 from cylinder path 20c to path 20r oil
Flowing further throttled, working rig will not be begun to decline suddenly.
By making guiding valve 21 from the direction of down position D (by throttling down position Da) direction resistance spring 22 (in Fig. 6
The direction of arrow) it is mobile, guiding valve 21 arrives first at neutral position N.
It is always maintained at connecting with fuel tank path 20t in neutral position N, pump path 20p, on the other hand, guiding valve 21 both can be with
Cylinder path 20c is blocked from path 20r, cylinder path 20c can also be blocked from fuel tank path 20t.Thus, even if oily from lift cylinder 2
Grease chamber 2a to cylinder path 20c flow into, can not also flow to throttle passage 20r, therefore, stop discharge the oil from lift cylinder 2.This
Outside, because cylinder path 20c is not also connected with pump path 20p, therefore, the oil from pumping hole 10p will not be supplied to lift cylinder 2.
In this way, in neutral position N, as long as not occurring to leak to fuel tank because of the load from lift cylinder 2 as described above
The state of affairs of mouth 10t sides, cylinder path 20c oil would not be flowed, and therefore, the oil pressure in the grease chamber 2a of lift cylinder 2 is kept herein
State, lift arm 1 is maintained at position now.
Moreover, when making guiding valve 21 be moved up in the side of resistance spring 22, when making its arrival lifting position U, guiding valve 21 is passed through
By its shoulder, pump path 20p is connected to cylinder path 20c, on the other hand, fuel tank path 20t and path 20r is closed respectively,
By the suction oil supply from pumping hole 10p to cylinder oil circuit 20d, moreover, electromagnetism is ended by the oily oil pressure from pumping hole 10p
The check valve 32 of valve 30 is opened, and by the suction oil supply from pumping hole 10p to the grease chamber 2a of lift cylinder 2, makes lift arm 1 upward
Rotate.
It should be noted that being located at raise-position in the throttling of the transition midway from neutral position N to lifting position U in guiding valve 21
Put in the state of Ua, limited from pump path 20p by cylinder path 20c oily flowing by the breach on the surface for being formed at shoulder
System, working rig will not be begun to ramp up suddenly.
Then, the composition of electromagnet cut off valve 30 is described in detail by Fig. 1 to Fig. 5, Fig. 7 to Figure 10.
Electromagnet cut off valve 30 is configured to the cartridge type for combining check valve assembly 50 and solenoid 60.
Check valve assembly 50 is by 55 groups of valve seat member 51, movable valve member 52, guiding valve 53, spring 54 and non-return valve
Conjunction is formed.
The insertion of valve seat member 51 is fixed in the valve chamber 43 of manifold 40, and its nut portions 51d is configured at into manifold 40
Outside.In the part opposed with pump/fuel tank side oil circuit 42 of valve seat member 51, opening has pump/fuel tank side port 51a, with cylinder side
The opposed outs open of oil circuit 44 has cylinder side port 51c.In addition, in the pump/fuel tank side port 51a and cylinder side port 51c of valve seat member 51
Between be formed in part with valve seat 51b.
In valve seat member 51, with (below, being used as electromagnet cut off valve 30 on pump/identical axle center of fuel tank side oil circuit 42
Axis direction) be sliding freely equipped with the movable valve member 52 of poppet shape.
Movable valve member 52 is seated at the valve seat 51b of valve seat member 51, thus, by the pump of valve seat member 51/fuel tank side port
Blocked between 51a and cylinder side port 51c, pump/oily circulation between fuel tank side oil circuit 42 and cylinder side oil circuit 44 is blocked.The state
It is the closed valve state of electromagnet cut off valve 30.
Then, movable valve member 52 relative to pump/fuel tank side oil circuit 42 to opposite Slideslip, away from valve seat 51b, thus,
Connection pump/fuel tank side port 51a and cylinder side port 51c gap can be produced in valve seat member 51, oil can be in pump/fuel tank side oil circuit 42
Circulated between cylinder side oil circuit 44.The state is the valve opening state of electromagnet cut off valve 30.
In addition, being formed with back pressure chamber 51e in the nut portions 51d of foregoing valve seat member 51.
Valve chamber 52a is formed with movable valve member 52, is also formed with making valve chamber 52a and valve seat member 51 cylinder side
The oil circuit 52b of mouth 51c (no matter whether movable valve member 52 is seated at valve seat 51b) connections all the time.
In the valve chamber 52a of movable valve member 52, on the axis direction of electromagnet cut off valve 30, guiding valve 53 with relative to
The relative mode slid freely of movable valve member 52 is arranged.Helicla flute 53a is formed with the peripheral part of guiding valve 53, via oil
The oil that road 52b is flowed into valve chamber 52a, can flow into back pressure chamber 51e via helicla flute 53a.
Moreover, in movable valve member 52, valve chamber 52a is connected with pump/fuel tank side port 51a of valve seat member 51
Mode, is formed with damping hole 52c.Generally, the damping hole 52c faced with valve chamber 52a openend is sealed by the top of guiding valve 53
Close (reference picture 7, Fig. 8 and Figure 10).
In addition, in valve chamber 52a, spring 54 is folded between movable valve member 52 and guiding valve 53.
Non-return valve 55 is provided with pump/fuel tank side port 51a tip portion in movable valve member 52.
If pump/fuel tank side port 51a is identical with back pressure chamber 51e pressure, the damping hole faced with pump/fuel tank side port 51a
52c openend will not be closed by non-return valve 55, but be connected (reference picture 7, Fig. 9, Figure 10) with pump/fuel tank side port 51a, but
When pump/fuel tank side port 51a pressure is higher than back pressure chamber 51e, non-return valve 55 is pressed by its oil pressure, will be with pump/fuel tank side
The openend closing (reference picture 8) for the damping hole 52c that mouth 51a is faced.
Cylinder 61 unshakable in one's determination, movable core 62, fixed iron core 63, spring 64 and coil 65 are formed by combining by solenoid 60.
Cylinder 61 unshakable in one's determination is the installation component of whole solenoid 60, by the way that cylinder 61 unshakable in one's determination insertion is fixed in check valve assembly
The back pressure chamber 51e of the nut portions 51d openings of 50 valve seat member 51, check valve assembly 50 is installed on by solenoid 60.
It is fixed in back pressure chamber 51e cylinder unshakable in one's determination 61, is slid freely on the axis direction of electromagnet cut off valve 30 in insertion
Ground is provided with movable core 62, and its top ends is close into the end from the guiding valve 53 prominent into back pressure chamber 51e of movable valve member 52
Portion, guiding valve 53 is integratedly slided with movable core 62 on the axis direction of electromagnet cut off valve 30.
In the opposite opposite side with check valve assembly 50 of movable core 62, with the identical axle center of movable core 62
Being extended has fixed iron core 63, encircles in fixed iron core 63 and cylinder 61 unshakable in one's determination and is provided with coil 65.
When coil 65 is powered, fixed iron core 63 is excited, and movable core 62 is to opposite with check valve assembly 50 opposite
Side is that the valve opening position of electromagnet cut off valve 30 slides and is adsorbed on fixed iron core 63.
It is electricity to the side of check valve assembly 50 by the spring 64 in addition, being equipped with spring 64 in the inside of movable core 62
The valve closing direction of magnetic stop valve 30 exerts a force to movable core 62.
It should be noted that as shown in fig. 5 or the like, when movable valve member 52 is seated at the valve seat 51b of valve seat member 51, i.e.,
In 30 valve closing of electromagnet cut off valve, there is clearance G between movable core 62 and fixed iron core 63.
In the way of the axle center part of insertion movable core 62 and fixed iron core 63, provided with forcing valve opening bar 66, outside it
End is protruding outside to fixed iron core 63, and pressure valve opening knob 67 is installed with the nose portion.
For example, being configured to：When being powered after engine stop or due to the failure of electrical system without normal direction solenoid 60,
In the case where wanting to decline working rig, pressure valve opening knob 67 is manually operated, pulls and forces valve opening bar 66, by force
Valve opening bar 66 processed is in the state that movable core 62 is pressed against to fixed iron core 63, and movable valve member 52 is separated with valve seat 51b,
The valve opening of electromagnet cut off valve 30 can forcibly be made.
Using Fig. 7 to Figure 10, on controlling excitation/non-excitation of solenoid 60 and being changed with directional control valve 20
Change of oily flowing in the state change and manifold 40 of gear associated, electromagnet cut off valve 30 check valve assembly 50 etc. is entered
Row explanation.
First, Fig. 7 represents the situation of electromagnet cut off valve 30 of the solenoid 60 for the state of non-excitation, in closed valve state,
Fig. 8 represents the situation of electromagnet cut off valve 30 of the solenoid 60 for the state of non-excitation, in valve opening state.
When coil 65 is not powered on, in the state of closing damping hole 52c openend as previously described, with movable core
The top of the mobile guiding valve 53 of 62 one is pressed by spring 54 is contacted with movable valve member 52, thus, movable valve member 52
It is pressed against the valve seat 51b of valve seat member 51.
In this condition, when directional control valve 20 is located at neutral position N or down position D, pump/fuel tank side port 51a
Interior oil pressure is less than cylinder side port 51c, as shown in fig. 7, electromagnet cut off valve 30 carries out valve closing.
Not only when directional control valve 20 is located at down position D, and when directional control valve 20 is located at neutral position N,
Apply the load in the direction for shrinking piston rod 3 to lift cylinder 2 by the deadweight for the working rig for being linked to lift arm 1.But,
Solenoid 60 is non-excited state, as long as shown in fig. 7, the valve closing of electromagnet cut off valve 30, the oil of such cylinder side oil circuit 44 will be from
Damping hole 51b is flowed into valve chamber 52a and is directed in back pressure chamber 51e, the applying power of additional springs 54 on the oil pressure,
Thus movable valve member 52 is acted on to the application of valve closing direction.
Therefore, although directional control valve 20 is arranged at neutral position N, but will not occur the feelings that working rig surprisingly declines
Condition.In other words, electric solenoid pipe valve 30 is used as the stop valve (safety for preventing the oil leakage from lift cylinder 2 to directional control valve 20
Valve) play a role.
If in addition, in the state of solenoid 60 is non-excitation, directional control valve 20 being set into lifting position U, then may be used
Dynamic valve member 52 bears its oil pressure and valve opening, to the grease chamber 2a fuel feeding of lift cylinder 2 working rig can be made to increase.
Therefore, it can be said that the electric solenoid pipe valve 30 when solenoid 60 is non-excitation also serves as only allowing from manifold 40
Pump/fuel tank side oil circuit 42 plays a role to the check valve of the oily flowing of cylinder side oil circuit 44.
Then, the situation of the electromagnet cut off valve 30 when Fig. 9 and Figure 10 represent to make 60 excitation of solenoid.
When making 60 excitation of solenoid, movable core 62 is slided to fixed iron core 63, is adsorbed in fixed iron core 63, guiding valve 53
Also with movable core 62 integratedly to the Slideslip of solenoid 60.
Fig. 9 is to represent that movable core 62 is adsorbed in the figure of the initial state of fixed iron core 63, the resistance spring 54 of guiding valve 53
Applying power, the instantaneous sliding motion together with movable core 62, but movable valve member 52 still keeps by the oil pressure in valve chamber 52a
Seat is in valve seat 51b state.
When the damping hole 52c faced with valve chamber 52a openend is left on the top of guiding valve 53, pump/fuel tank side port 51a
Connected with cylinder side port 51c via valve chamber 52a and oil circuit 52b or damping hole 52c.Therefore, under directional control valve 20 is located at
When decrease puts D, if making the excitation of solenoid 60, it can decline working rig from the grease chamber 2a tapped oils of lift cylinder 2.
In order to which solenoid 60 is switched into excited state from non-excited state, it is contemplated that：It will for example be used to open electromagnetism section
Only the switch of valve 30 is located near the driver's seat of vehicle in advance, the handover operation that operator is manually switched.But, from anti-
Only from the viewpoint of the operational error (operation is forgotten) of stop valve, preferably the switching of the excitation of solenoid 60/non-excitation is made
Automatically control, furthermore it is preferred that by the switching electrical ties of the excitation of the solenoid 60/non-excitation in manually operated driving positioned at vehicle
Sail the gearshift of the directional control valve 20 of the operation instrument (control-rod, switch etc.) of working rig lifting near seat.
It is therefore preferable that being to be provided with controller, and the automatic control system provided with electromagnet cut off valve 30, the electricity in the vehicle
The automatic control system of magnetic stop valve 30 is configured to：The operating position of operation instrument based on detection operation machine lifting or
The operating position of the guiding valve 21 of directional control valve 20, instruction letter is sent by controller to the solenoid 60 of electromagnet cut off valve 30
Number.
When constitute this automatic control system when, directional control valve 20 is set in down position D, neutral position N, on
When U each position is put in raise-position, it is important that solenoid 60 should be set into excitation and also be set to non-excitation.
First, if not making the excitation of solenoid 60, electromagnet cut off valve 30 will not flow to pump/oil with oil from cylinder side port 51c
Case side port 51a mode valve opening, therefore, when directional control valve 20 is set in into down position D, it should encourage solenoid 60
Magnetic.
When directional control valve 20 is set in into lifting position U, it is also non-excited state that no matter solenoid 60, which is in excitation,
Electromagnet cut off valve 30 can valve opening, so that oil flows to cylinder side port 51c from pump/fuel tank side port 51a, therefore, no matter which kind of, but
For the face of cost performance, it is considered to be preferably set to non-excitation.
Then, when directional control valve 20 is set into neutral position N, if solenoid 60 is set into non-excitation, in non-
On-position 30a electromagnet cut off valve 30 reliably blocks from cylinder side port 51c to pump/fuel tank side port 51a oily flowing, because
This, can prevent the unexpected decline of working rig.Therefore, when directional control valve 20 is set into neutral position N, electromagnet cut off valve 30 is made
For for preventing the unexpected stop valve declined of working rig from playing a role.
If as described above, using the valve gear 10 of the electromagnet cut off valve 30 with the present invention, only controlled by direction
, therefore, can not only using the construction for the excitation of solenoid 60 for making electromagnet cut off valve 30 when valve 20 processed is set to down position D
Control power consumption, moreover it is possible to the natural decline for the working rig being reliably suppressed when directional control valve 20 to be set to neutral position N.
It should be noted that can also by it is existing, can be carried out by handover operation based on manually operated switch etc.
The stop valve of the structure of switching is installed on valve gear 10, to replace electromagnet cut off valve 30.In this case, stop valve will be used as
The open end of pump/fuel tank side port is connected to the cylinder mouthful 11d of valve casing 11.
, will be built with the past as operation conversely speaking, for the valve gear 10 of the electromagnet cut off valve 30 with the present invention
Pressure regulation overflow valve 15 that the apparatus for controlling of lifting of machine is used, flow control valve 16, directional control valve 20 and it can switch political loyalty
The valve casing 11 of the stream grade of valve 25 is used with keeping intact, and modularization is thus sought, easily to replace electromagnet cut off valve 30
Into existing stop valve.
Description of reference numerals：
1 lift arm
2 lift cylinders
10 valve gears
11 valve casings
11p (valve casing 11) pumping hole
11t (valve casing 11) reservoir port
11d (valve casing 11) cylinder mouthful
20 directional control valves
30 electromagnet cut off valve
40 manifolds
42 pumps/fuel tank side oil circuit
44 cylinder side oil circuits
50 check valve assemblies
60 solenoids.
Claims (3)
1. a kind of apparatus for controlling of lifting of working rig, possesses：
The hoist cylinder of working rig lifting, when rising working rig, supply pressure oil, is discharged when declining working rig
Pressure oil；
Directional control valve, supply/discharge of the pressure oil for controlling the hoist cylinder；And
Valve casing, built with direction control valve, and with pumping hole, reservoir port and cylinder mouthful,
The apparatus for controlling of lifting of the working rig is characterised by,
Possess：Manifold, is clipped between cylinder of the valve casing mouthful and the hoist cylinder,
Pump/fuel tank side oil circuit and cylinder side oil circuit are formed with the manifold,
Cylinder mouthful that what the end of the pump of the manifold/fuel tank side oil circuit was open be partially attached to the valve casing, and dismount from
The valve casing such as is installed on,
The open end of the cylinder side oil circuit of the manifold can be connected to the hoist cylinder,
Electromagnet cut off valve is installed in the manifold.
2. the apparatus for controlling of lifting of working rig according to claim 1, it is characterised in that
The electromagnet cut off valve is under its solenoidal non-excited state as only allowing from the pump/fuel tank side of the manifold
Oil circuit plays a role to the check valve of the oily flowing of cylinder side oil circuit,
The electromagnet cut off valve is in the pump/fuel tank side oil circuit that can make oil in the manifold with being somebody's turn to do under the solenoidal excited state
The valve opening state two-way circulated between the oil circuit of cylinder side.
3. the apparatus for controlling of lifting of working rig according to claim 2, it is characterised in that
That is, for being supplied to the hoist cylinder directional control valve presses for that can be set in the composition of following any position
Power oil lifting position, for from the hoist cylinder discharge pressure oil down position, for stopping the hoist cylinder
The neutral position of supply/discharge of pressure oil,
Only when direction control valve is set in into the down position, the solenoid and the direction of the electromagnet cut off valve
The operation instrument of control valve, which is interlocked, to be linked, to carry out excitation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-257021 | 2015-12-28 | ||
| JP2015257021A JP6651101B2 (en) | 2015-12-28 | 2015-12-28 | Work machine lifting control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107013513A true CN107013513A (en) | 2017-08-04 |
| CN107013513B CN107013513B (en) | 2021-05-14 |
Family
ID=59271875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611220310.XA Active CN107013513B (en) | 2015-12-28 | 2016-12-26 | Lifting control device for working machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6651101B2 (en) |
| CN (1) | CN107013513B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0653802U (en) * | 1992-12-28 | 1994-07-22 | 株式会社島津製作所 | Cylinder drive circuit |
| JPH07332309A (en) * | 1994-06-13 | 1995-12-22 | Ichikawagumi Kk | Hydraulic device |
| US6113066A (en) * | 1996-02-07 | 2000-09-05 | Robert Bosch Gmbh | Electromagnetically actuated valve for hydraulic brake for motor vehicles |
| CN102575691A (en) * | 2009-09-02 | 2012-07-11 | 日立建机株式会社 | Hydraulic drive device for hydraulic working machine |
| CN104619999A (en) * | 2012-11-07 | 2015-05-13 | 日立建机株式会社 | Hydraulic drive device for construction machinery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610309U (en) * | 1979-07-04 | 1981-01-29 | ||
| JPS58110204U (en) * | 1982-01-23 | 1983-07-27 | 三菱農機株式会社 | Mobile agricultural machinery lifting device |
| JP3808808B2 (en) * | 2002-07-03 | 2006-08-16 | 株式会社アイチコーポレーション | Cylinder operation control device |
| DE10336684A1 (en) * | 2003-08-09 | 2005-03-03 | Deere & Company, Moline | Hydraulic control arrangement for a mobile work machine |
| JP2009156366A (en) * | 2007-12-27 | 2009-07-16 | Hitachi Constr Mach Co Ltd | Drive device for high lift working machine |
-
2015
- 2015-12-28 JP JP2015257021A patent/JP6651101B2/en active Active
-
2016
- 2016-12-26 CN CN201611220310.XA patent/CN107013513B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0653802U (en) * | 1992-12-28 | 1994-07-22 | 株式会社島津製作所 | Cylinder drive circuit |
| JPH07332309A (en) * | 1994-06-13 | 1995-12-22 | Ichikawagumi Kk | Hydraulic device |
| US6113066A (en) * | 1996-02-07 | 2000-09-05 | Robert Bosch Gmbh | Electromagnetically actuated valve for hydraulic brake for motor vehicles |
| CN102575691A (en) * | 2009-09-02 | 2012-07-11 | 日立建机株式会社 | Hydraulic drive device for hydraulic working machine |
| CN104619999A (en) * | 2012-11-07 | 2015-05-13 | 日立建机株式会社 | Hydraulic drive device for construction machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107013513B (en) | 2021-05-14 |
| JP2017120109A (en) | 2017-07-06 |
| JP6651101B2 (en) | 2020-02-19 |
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