CN206826746U - Hydraulic control braking in a turn valve and its hydraulic control braking in a turn system with the valve - Google Patents
Hydraulic control braking in a turn valve and its hydraulic control braking in a turn system with the valve Download PDFInfo
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- CN206826746U CN206826746U CN201720778094.4U CN201720778094U CN206826746U CN 206826746 U CN206826746 U CN 206826746U CN 201720778094 U CN201720778094 U CN 201720778094U CN 206826746 U CN206826746 U CN 206826746U
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Abstract
It the utility model is related to a kind of hydraulic control braking in a turn valve, belong to technical field of engineering machinery, including switching valve and brake valve, switching valve is provided with steering valve core, turns to oil suction chamber and lead to the turn-around chamber of steering cluth, brake valve includes brake spool, brakes oil suction chamber and lead to the brake chamber of arrestment mechanism, and brake spool axial movement can make braking oil suction chamber connect or disconnect with the brake chamber；Block is provided with the left of steering valve core and brake spool, oil duct is provided with block, oil pocket one is provided with inside steering valve core and connects the oilhole one of oil pocket one, brake spool is internally provided with connection oil pocket two, connection oil pocket one is connected with connection oil pocket two by the oil duct in block, and steering valve core right-hand member is provided with guide's oilhole.Original mechanical operation is replaced by hydraulic control guide, reduces driver's working strength.Fundamentally relieve clutch and also begin to brake fault hidden danger without cut-out power, brake.A kind of hydraulic control braking in a turn system is also disclosed in the utility model.
Description
Technical field
The utility model belongs to technical field of engineering machinery, and in particular to a kind of hydraulic control braking in a turn valve and its has the valve
Hydraulic control braking in a turn system.
Background technology
Hydraulic control braking in a turn valve has a wide range of applications in engineering machinery, by taking bull-dozer as an example, traditional bull-dozer liquid
Control braking in a turn valve promotes steering valve core to realize and turned to first using same control stick, then promotes brake spool to realize braking, according to
By switching valve and braking the pressure curve of stroke of valve one difference to control steering cluth first to separate, arrestment mechanism is braked again, system
Motivation structure can be brake (i.e. brake) or brake coupling, below using brake as arrestment mechanism exemplified by
Illustrate.
Fig. 1-2 is refer to, Fig. 1 is a kind of structural representation of typical hydraulic control braking in a turn valve；Fig. 2 is steering cluth
With brake oil pressure with spool displacement change curve.
Hydraulic control braking in a turn valve includes switching valve 120 and brake valve 130.
The valve body of switching valve 120 be provided with the axis of guide 12, steering valve core 14, turn-around chamber 1B, turn to hydraulic fluid port 1B ', turn into
Oil pocket 1A, the first spring 13, the spring 16 of second spring 15 and the 3rd, wherein, the axis of guide 12 and steering valve core 14 are co-axially mounted.System
The valve body of dynamic valve 130 is provided with bearing pin 19, brake spool 18, braking oil suction chamber 1C, brake chamber 1D, the 4th spring 110, the 5th bullet
Spring 111, the 6th spring 17.
During steering, control stick 11 overcomes the elastic force of the first spring 13 to promote the axis of guide 2 first, and the axis of guide 12 overcomes the second bullet
Spring 15, the 3rd spring 16 elastic force promote steering valve core 14 move right, turn to oil suction chamber 1A communicated with turn-around chamber 1B, turn into
Oil pocket 1A is connected with hydraulic pump, then turn-around chamber 1B, turn-around chamber can be flowed into by turning to the pressure oil from hydraulic pump in oil suction chamber 1A
1B leads to steering cluth 140 by turning to hydraulic fluid port 1B ', and general hydraulic oil is filled between the piston of steering cluth 140 and wheel hub
Oil pocket, oil pressure promotes piston simultaneously to drive platen to move, then the friction plate of steering cluth 140 and gear piece unclamp, and no longer pass
Graduating power, realize the steering of bull-dozer.
Steering valve core 14 is provided with steering balance chamber 1K and turns to restriction 1a, turns to restriction 1a connection turn-around chamber 1B,
Then the hydraulic oil in turn-around chamber 1B flows to steering balance chamber 1K by turning to restriction 1a, and steering balance chamber 1K pressure oil is to turning
To valve element 14 with active force to the left.When the oil pressure (i.e. steering balance valve 1K oil pressure) in turn-around chamber 1B is to steering valve core 14
Active force be more than second spring 15 elastic force when, promote steering valve core 14 be moved to the left, make steering oil suction chamber 1A lead to turn to
Chamber 1B opening reduces, and reduces turn-around chamber 1B pressure, until force balance.Therefore, turn-around chamber 1B pressure and second spring
15 decrement is the relation of ratio change, and the decrement of second spring 15 and the stroke of control stick 11 are in ratio variation relation, i.e.,
Turn-around chamber 1B pressure and the stroke of control stick 11 are in ratio variation relation.
With the increasing of the stroke of control stick 11, control stick 11 can overcome the elastic force of the 4th spring 110 and the 5th spring 111
Bearing pin 19 is promoted, bearing pin 19 promotes brake spool 18 to overcome the elastic force of the 6th spring 17 to move to right, and brakes oil suction chamber 1C and brake chamber
1D is communicated, and the pressure oil from hydraulic pump flows to brake chamber 1D in braking oil suction chamber 1C, and the hydraulic oil in brake chamber 1D leads to system
Dynamic boost motor.Braking booster device brakes 140 outer hub of skid steer clutch, realizes the function of assisting to turn to.The He of switching valve 120
Brake valve 130 can turn to oil suction chamber 1A and brake oil suction chamber 1C and connect in-line 1P by a hydraulic pressure oil pump feed, in Fig. 2.
Flow-restricted port braking 1b and brake compensation chamber 1L are additionally provided with the valve body of brake valve.Hydraulic oil in brake chamber 1D passes through
Flow-restricted port braking b leads to brake compensation chamber 1L, and brake compensation chamber 1L pressure oil has active force to the left to brake spool 18.When
Hydraulic fluid pressure (i.e. brake compensation chamber 1L pressure) in brake chamber 1D is more than the 5th spring to the active force of brake spool 18
During 11 elastic force, promote brake spool 18 to be moved to the left, reduce braking oil suction chamber 1C towards brake chamber 1D opening, reduce system
Dynamic chamber 1D pressure, until force balance, so brake chamber 1D pressure and the decrement of the 5th spring 111 are ratio changes
Relation, and the decrement of the 5th spring 111 and the travel proportional of control stick 11 change, i.e. brake chamber 1D pressure and the stroke of control stick 11
In ratio variation relation.
When stopping turning to, the upper-pilot power of control stick 11 disappears, and steering valve core 14 can be in spring with brake spool 18
Effect is lower to be resetted.
To be analyzed more than, oil liquid pressure size is also controlled by brake spool displacement in brake, as shown in Fig. 2
Power needed for control stick 11 becomes big with brake pressure and becomes big.Therefore clutch is not only existed in practical operation not cut also
Disconnected power, brake begin to brake fault hidden danger；And steering force is larger, long-term manipulate easily triggers driver's driving fatigue.
Utility model content
The purpose of this utility model is to provide a kind of hydraulic control braking in a turn valve, solves clutch also without cut-out power, system
Dynamic device begins to brake fault hidden danger；It is long-term to manipulate the problem of easily triggering driver's driving fatigue and steering force is larger.
Another object of the present utility model is to provide a kind of steering control system.
To reach the first purpose of the present utility model, the utility model provides the first solution, and a kind of hydraulic control turns to
Brake valve, including switching valve and brake valve, the switching valve are provided with steering valve core, turn to oil suction chamber and lead to steering cluth
Turn-around chamber, steering valve core axial movement can make the steering oil suction chamber connect or disconnect with the turn-around chamber；It is described
Brake valve includes brake spool, brakes oil suction chamber and lead to the brake chamber of arrestment mechanism, and the brake spool axial movement can
The braking oil suction chamber is set to connect or disconnect with the brake chamber；Block is provided with the left of the steering valve core and brake spool,
Oil duct is provided with block, steering valve core is internally provided with oil pocket one and connects the oilhole one of oil pocket one, set inside brake spool
There is connection oil pocket two, connection oil pocket one is connected with connection oil pocket two by the oil duct in block, and the steering valve core right-hand member is provided with
Guide's oilhole, and steering valve core puts in guide's oilhole.
Preferably, the oil pocket that unloads of connection fuel tank is provided with the right side of the turn-around chamber, steering valve core axial movement can make institute
State fuel tank to connect or disconnect with the turn-around chamber, screw plug is provided with the right side of steering valve core, guide's oilhole runs through whole screw plug, turns to
Axle is provided with the right side of valve element, axle left end stretches out steering valve body to be fixed with block, and oil pocket one divides is arranged on steering for two parts, a part
Inside valve element left end, another part runs through whole axle, and steering valve core left end is reached in the oil pocket one in axle, and axle right-hand member is cased with bullet
Spring, the right-hand member and steering valve core left end of axle are stepped, and spring one end is arranged on the shaft shoulder of axle, and the other end, which is arranged on, to be turned to
On the shaft shoulder of valve element.
Preferably, reseting cavity is provided with the brake valve, the reseting cavity connects the braking oil suction chamber；The reseting cavity
Interior hydraulic oil acts on the pressure direction of the brake spool, is acted on the steering cavity pressure oil on the brake spool
Pressure direction it is opposite.One end of the brake spool has the first blind hole, and plunger, the post are fitted with first blind hole
One end of plug is stretched out first blind hole and connected with the end of the braking valve body, and the plunger stretches out first blind hole
Part form the reseting cavity with the brake spool, valve body, hydraulic oil acts on the brake spool in the reseting cavity
At upper annular end face corresponding with first blind hole.
Preferably, the periphery of the brake spool is provided with annular groove, the internal perisporium shape of the annular groove and the brake valve
Into restriction, the restriction connection braking oil suction chamber and the reseting cavity；Hydraulic oil acts on institute in the oil pocket two
The area for stating brake spool is more than the area that hydraulic oil in the reseting cavity acts on the brake spool, the valve of the brake valve
Body is provided with least one drain tap.
To reach the second purpose of the present utility model, the utility model provides the first solution, and a kind of hydraulic control turns to
Brakes, including fuel tank, oil pump, left steering clutch, right turn clutch, left brake and right brake, pilot valve, turn
To safety valve；Also include left hydraulic control braking in a turn valve and right hydraulic control braking in a turn valve, left hydraulic control braking in a turn valve and right hydraulic control turn
It is integrated in brake valve on same valve body, the left hydraulic control braking in a turn valve and right hydraulic control braking in a turn valve are to reach first
Hydraulic control braking in a turn valve described in first solution of purpose.
To reach the first purpose of the present utility model, the utility model provides second of solution, and a kind of hydraulic control turns to
Brake valve, including switching valve and brake valve, the switching valve is provided with the turn-around chamber that steering valve core leads to steering cluth, described
Brake valve includes brake spool, brakes oil suction chamber and lead to the brake chamber of arrestment mechanism, and the brake spool axial movement can
The braking oil suction chamber is set to connect or disconnect with the brake chamber；Block is provided with the left of the steering valve core and brake spool,
Oil duct is provided with block, the oil pocket one through its left and right is set inside steering valve core, oil pocket one is provided with oilhole two, and oilhole two is another
One end connects turn-around chamber, and brake spool is internally provided with connection oil pocket two, and connection oil pocket one and connection oil pocket two are by block
Oil duct connects.
Preferably, the steering valve core is integral formula, and is turned on the right side of steering valve core by being threadably mounted on valve body,
Steering valve core right-hand member, which stretches out, turns to valve body.
Preferably, reseting cavity is provided with the brake valve, the reseting cavity connects the braking oil suction chamber；The reseting cavity
Interior hydraulic oil acts on the pressure direction of the brake spool, is acted on the steering cavity pressure oil on the brake spool
Pressure direction it is opposite.One end of the brake spool has the first blind hole, and plunger, the post are fitted with first blind hole
One end of plug is stretched out first blind hole and connected with the end of the braking valve body, and the plunger stretches out first blind hole
Part form the reseting cavity with the brake spool, valve body, hydraulic oil acts on the brake spool in the reseting cavity
At upper annular end face corresponding with first blind hole.
Preferably, the periphery of the brake spool is provided with annular groove, the internal perisporium shape of the annular groove and the brake valve
Into restriction, the restriction connection braking oil suction chamber and the reseting cavity；Hydraulic oil acts on institute in the oil pocket two
The area for stating brake spool is more than the area that hydraulic oil in the reseting cavity acts on the brake spool, the valve of the brake valve
Body is provided with least one drain tap.
To reach the second purpose of the present utility model, the utility model provides second of solution, and a kind of hydraulic control turns to
Brakes, including fuel tank, oil pump, left steering clutch, right turn clutch, left brake and right brake, pilot valve, turn
To safety valve；Also include left hydraulic control braking in a turn valve and right hydraulic control braking in a turn valve, left hydraulic control braking in a turn valve and right hydraulic control turn
It is integrated in brake valve on same valve body, the left hydraulic control braking in a turn valve and right hydraulic control braking in a turn valve are to reach first
Hydraulic control braking in a turn valve described in second solution of purpose.
Compared with prior art, the utility model has the advantage of：
Original mechanical operation is replaced by hydraulic control guide, improves handling comfort, reduces driver's working strength.Utilize
Pressure fundamentally relieves clutch also without cut-out power, system as brake valve element opening control signal in clutch
Dynamic device begins to brake fault hidden danger.
Brief description of the drawings
Fig. 1 is a kind of structural representation of typical braking in a turn valve；
Fig. 2 is steering cluth and brake oil pressure with brake spool displacement changing curve；
Fig. 3 is a kind of structural representation of hydraulic control braking in a turn valve of the utility model；
Fig. 4 is the hydraulic schematic diagram for the hydraulic control braking in a turn system for applying Fig. 3；
Fig. 5 is the structural representation of the utility model another kind hydraulic control braking in a turn valve；
Fig. 6 is the hydraulic schematic diagram for the hydraulic control braking in a turn system for applying Fig. 5；
Fig. 7 is the brake spool force analysis in Fig. 3；
Brake pressure is with steering cluth pressure history during Fig. 8 is 4；
In Fig. 1-2：
120th, switching valve, 130, brake valve, 140, steering cluth, 150, brake, 11, control stick, 12, the axis of guide,
13rd, the first spring, 14, reversing valve core, 15, second spring, 1A, turn to oil suction chamber, 1B, turn-around chamber, 1B ', turn to hydraulic fluid port, 1a,
Turn to restriction, 1K, steering balance chamber, the 16, the 3rd spring, 112, spring base, the 111, the 5th spring, the 110, the 4th spring, 19,
Bearing pin, the 17, the 6th spring, 18, brake spool, 1D, brake chamber, 1C, braking oil suction chamber, 1b, flow-restricted port braking, 1L, braking are flat
Weigh chamber, 1P, oil-feed oil circuit；
In Fig. 3-6：
20th, fuel tank, 30, oil pump, 40, left steering clutch, 50, right turn clutch, 60, left brake, 70, right braking
Device, 80, pilot valve, 90, turn to safety valve, 100, left hydraulic control braking in a turn valve, 200, right hydraulic control braking in a turn valve, 1, turn to
Valve, 2, axle, 3, spring, 4, steering valve core, 5, screw plug, 6, brake valve, 7, brake spool, 8, plunger, 9, block, A, turn to oil-feed
Chamber, a, oilhole two, B, turn-around chamber, b, oilhole one, D, braking oil suction chamber, E, oil pocket one, F, brake chamber, G, unload oil pocket, H, reset
Chamber, K, oil pocket two.
Embodiment
Below against accompanying drawing, specific embodiment of the present utility model is described in further detail.
Embodiment one
Hydraulic control braking in a turn valve as shown in Figure 3 and Figure 4, including switching valve 1 and brake valve 6, the switching valve 1 are provided with
Steering valve core 4, turn to oil suction chamber A and lead to the turn-around chamber B of steering cluth, the axial movement of steering valve core 4 can make institute
Steering oil suction chamber A is stated to connect or disconnect with the turn-around chamber B；The brake valve 6 includes brake spool 7, braking oil suction chamber D and led to
To the brake chamber F of arrestment mechanism, the axial movement of brake spool 7 can connect the braking oil suction chamber D and brake chamber F
On-off is opened；Characterized in that, the left side of the steering valve core 4 and brake spool 7 is provided with block 9, oil duct is provided with block 9,
Steering valve core 4 is internally provided with the E of oil pocket one and connects the E of oil pocket one b of oilhole one, and brake spool 7 is internally provided with connection oil pocket
Two K, the connection E of oil pocket one are connected with the connection K of oil pocket two by the oil duct in block 9, and the right-hand member of steering valve core 4 is provided with guide oil
Hole, and steering valve core 4 puts in guide's oilhole.
Connection fuel tank 20 is provided with the right side of the turn-around chamber B unloads oil pocket G, and the axial movement of steering valve core 4 can make described
Fuel tank 20 is connected or disconnected with the turn-around chamber B, and the right side of steering valve core 4 is provided with screw plug 5, and guide's oilhole runs through whole screw plug 5,
The right side of steering valve core 4 is provided with axle 2, and the left end of axle 2 stretches out switching valve 1 to be fixed with block 9, and E points of oil pocket one is two parts, and a part is set
Put inside the left end of steering valve core 4, another part runs through whole axle 2, and the left end of steering valve core 4 reaches the E of oil pocket one in axle 2
Interior, the right-hand member of axle 2 is cased with spring 3, and the right-hand member and the left end of steering valve core 4 of axle 2 are stepped, and the one end of spring 3 is arranged on the axle of axle 2
On shoulder, the other end is arranged on the shaft shoulder of steering valve core 4.
Reseting cavity H, the reseting cavity H connections braking oil suction chamber D are provided with the brake valve 6；In the reseting cavity H
Hydraulic oil acts on the pressure direction of the brake spool 7, and the brake spool 7 is acted on pressure oil in the turn-around chamber B
On pressure direction it is opposite.One end of the brake spool 7 has the first blind hole, and plunger 8, institute are fitted with first blind hole
The one end for stating plunger 8 is stretched out first blind hole and connected with the end of the valve body of brake valve 6, and the plunger 8 stretches out described
The part of first blind hole forms the reseting cavity H with the brake spool 7, valve body, and hydraulic oil acts on institute in the reseting cavity H
State on brake spool 7 at annular end face corresponding with first blind hole.
The periphery of the brake spool 7 is provided with annular groove, and the internal perisporium of the annular groove and the brake valve 6 forms throttling
Mouthful, the restriction connects the braking oil suction chamber D and reseting cavity H；Hydraulic oil acts on the system in the K of oil pocket two
The area of movable valve plug 7 is more than the area that hydraulic oil in the reseting cavity H acts on the brake spool 7, the valve of the brake valve 6
Body is provided with least one drain tap.Brake spool 7 is set just to be acted on by power F1, the original state of brake valve 6 is closed,
And the opening time of brake valve 6 is later than switching valve 1, avoid power from not cutting off brake valve 6 also and begin to work.
During without any operation, the fluid from oil pump 30 is by turning to the safety valve steering after 90s into switching valve 1
Oil suction chamber A, braking oil suction chamber D and brake.
Steering valve core 4 is in the rightmost side, and steering cluth communicates with unloading oil pocket G, clutch draining.Due to brake spool 7
Structure braking oil suction chamber D is communicated with reseting cavity H, brake spool 7 is in left end by fluid active force.
When manipulating the steering tiller in driver's cabin, guide's fluid flows into screw plug 5 by pilot valve 80, promotes steering valve core
4, to left movement, make turn-around chamber B be connected with turning to oil suction chamber A, turn to fluid and enter steering cluth by turn-around chamber B；Another way
Fluid enters b passages, into the E of oil pocket one, enters the K of oil pocket two of braking valve body 6 by the passage of block 9, brake spool 7 is by such as
Power shown in Fig. 7.
F3=P3 × A3
F2=P2 × A2
F1=P1 × A1-A2
A1=A3
F3=F2+F1
P2=A1/A2 × (P3-P1)+P1
P3 --- steering cluth pressure
P1 --- pump intake pressure
P2 --- brake pressure
The hydraulic coupling being subject on the left of F3 --- brake spool
By hydraulic coupling caused by piston 8 on the right side of F2 --- brake spool
F1 --- the hydraulic coupling on the right side of brake spool
Obtained by formula：
P2 maximum pressures are P1, i.e. pump carrys out oil pressure；Original state brake spool 7 is in high order end, braking oil suction chamber D with
Brake chamber F is obstructed, and P3 pressure is 0MPa, as P3 × A3=P1 × A1-A2, i.e.,Brake spool 7 starts to move to right, system
Dynamic oil suction chamber D and brake chamber F is connected, and fluid enters the chamber of piston 8 by the aperture c on brake spool 7, opens brake spool 7
Beginning is moved to the left by the effect of F2 power caused by brake fluid P2, closes braking oil suction chamber D and brake chamber F, with P3
The rise of pressure, brake spool 7 are moved to right again, and braking oil suction chamber D and brake chamber F is again switched on, the brake in two-way process
Pressure P2 persistently rises, and when the pressure P3 of steering cluth is increased to P1, brake spool 7 is opened completely, so as to which brake is complete
Work.
It can be learnt by Fig. 8 curve：Steering cluth sets up pressure with brake maximum pressure to turn to safety valve 90
Power P1；When steering cluth pressureBrake spool 7 is just started working afterwards, i.e., steering cluth is first started working,
When power cut rear brake is just started working.
Original mechanical operation is replaced by hydraulic control guide, improves handling comfort, reduces driver's working strength.Utilize
Pressure fundamentally relieves clutch also without cut-out power, system as brake valve element opening control signal in clutch
Dynamic device begins to brake fault hidden danger.
The utility model also provides a kind of hydraulic control braking in a turn system, including fuel tank 20, oil pump 30, left steering clutch
40th, right turn clutch 50, left brake 60 and right brake 70, pilot valve 80, steering safety valve 90；Also include left hydraulic control to turn
To brake valve 100 and right hydraulic control braking in a turn valve 200, left hydraulic control braking in a turn valve 100 and right hydraulic control braking in a turn valve 200 are integrated
On same valve body, the left hydraulic control braking in a turn valve 100 and right hydraulic control braking in a turn valve 200 are the hydraulic control of said structure
Braking in a turn valve 6.
Pilot valve 80 provides fluid and power source by oil pump 30.When not manipulating, the fluid of pilot valve 80 is back to fuel tank
20, switching valve 1 is in initial position, as shown in figure 4, the obstructed oil of steering cluth, in pressure-less state, steering cluth by
Spring-force driven dual, in engagement, passing power；Control oil circuit in the left side of brake valve 6 is in without oil state, brake spool 7
Due to being connected with working connection, brake spool 7 is in state shown in Fig. 4 in left side, and no fluid flows through brake valve 6, and brake is in
Not braking state.
When carrying out handling maneuver, the oil circuit of pilot valve 80 is opened, and fluid enters switching valve 1 by pilot valve 80, promotes phase
Answer side steering valve core 4 to move to right, make the logical oil of steering cluth, with the continuous rise of steering cluth oil liquid pressure, 1), clutch
Separated, cut off power transmission；2), brake spool 7 is promoted to move to right into the fluid of brake valve 6, brake valve 6 is opened, braking
Device is started working, and completes go to action.
Figure 3 above lists hydraulic control course changing control valve arrangement, and the wherein end of steering valve core 4 or so diameter is equal, and screw plug 5 is drilled with spiral shell
Pit, connect guide's oil circuit.
Embodiment two
Hydraulic control braking in a turn valve 6 as shown in Figure 5 and Figure 6, including switching valve 1 and brake valve 6, set on the switching valve 1
There is the turn-around chamber B that steering valve core 4 leads to steering cluth, the brake valve 6 includes brake spool 7, braking oil suction chamber D and led to
The brake chamber F of arrestment mechanism, the axial movement of brake spool 7 can be such that the braking oil suction chamber D is connected with the brake chamber F
Or disconnect；The left side of the steering valve core 4 and brake spool 7 is provided with block 9, is provided with oil duct in block 9, inside steering valve core 4
The E of oil pocket one through its left and right, the E of oil pocket one is set to be provided with a of oilhole two, a other ends of oilhole two connection turn-around chamber B, brake valve
Core 7 is internally provided with the connection K of oil pocket two, the connection E of oil pocket one and connected with the connection K of oil pocket two by the oil duct in block 9.
The steering valve core 4 is integral formula, and by being threadably mounted on switching valve 1 on the right side of steering valve core 4, switching valve
The right-hand member of core 4 stretches out switching valve 1.
Reseting cavity H, the reseting cavity H connections braking oil suction chamber D are provided with the brake valve 6；In the reseting cavity H
Hydraulic oil acts on the pressure direction of the brake spool 7, and the brake spool 7 is acted on pressure oil in the turn-around chamber B
On pressure direction it is opposite.One end of the brake spool 7 has the first blind hole, and plunger 8, institute are fitted with first blind hole
The one end for stating plunger 8 is stretched out first blind hole and connected with the end of the valve body of brake valve 6, and the plunger 8 stretches out described
The part of first blind hole and the brake spool 7, the valve body of brake valve 6 form the reseting cavity H, hydraulic oil in the reseting cavity H
Act on the brake spool 7 at annular end face corresponding with first blind hole.
The periphery of the brake spool 7 is provided with annular groove, and the internal perisporium of the annular groove and the brake valve 6 forms throttling
Mouthful, the restriction connects the braking oil suction chamber D and reseting cavity H；Hydraulic oil acts on the system in the K of oil pocket two
The area of movable valve plug 7 is more than the area that hydraulic oil in the reseting cavity H acts on the brake spool 7, the valve of the brake valve 6
Body is provided with least one drain tap.
The utility model also provides a kind of hydraulic control braking in a turn system, including fuel tank 20, oil pump 30, left steering clutch
40th, right turn clutch 50, left brake 60 and right brake 70, pilot valve 80, steering safety valve 90；Also include left hydraulic control to turn
To brake valve 100 and right hydraulic control braking in a turn valve 200, left hydraulic control braking in a turn valve 100 and right hydraulic control braking in a turn valve 200 are integrated
On same valve body, the left hydraulic control braking in a turn valve 100 and right hydraulic control braking in a turn valve 200 are in above-described embodiment 2
Described hydraulic control braking in a turn valve 6.
The course of work is as follows：Pilot valve 80 provides fluid and power source by oil pump 30.When not manipulating, the oil of pilot valve 80
Liquid is back to fuel tank 20, and switching valve 1 is in initial position, as shown in fig. 6, the obstructed oil of steering cluth, in pressure-less state,
Steering cluth spring-loaded, in engagement, passing power；Control oil circuit in the left side of brake valve 6 is in oil-free liquid
State, the left side of brake spool 7 with working connection due to connecting, and brake spool 7 is in state shown in Fig. 6, and no fluid flows through brake valve
6, brake is in not braking state.
When carrying out handling maneuver, the oil circuit of pilot valve 80 is opened, and fluid enters switching valve 1 by pilot valve 80, by turning
Enter the turn-around chamber B of steering cluth to a of oilhole two on valve element 4, make the logical oil of steering cluth, another part fluid passes through oil
The E of chamber one is internally provided with the connection K of oil pocket two into brake spool 7, with the continuous rise of steering cluth oil liquid pressure, 1, from
Clutch is separated, and cuts off power transmission；2nd, brake spool 7 is promoted to move to right into the fluid of brake valve 6, brake valve 6 is opened, system
Dynamic device is started working, and completes go to action.
Claims (10)
1. a kind of hydraulic control braking in a turn valve, including switching valve (1) and brake valve (6), the switching valve (1) are provided with steering valve core
(4), turn to oil suction chamber (A) and lead to the turn-around chamber (B) of steering cluth, steering valve core (4) axial movement can make institute
Steering oil suction chamber (A) is stated to connect or disconnect with the turn-around chamber (B)；The brake valve (6) include brake spool (7), brake into
Oil pocket (D) and the brake chamber (F) for leading to arrestment mechanism, brake spool (7) axial movement can make the braking oil suction chamber
(D) connect or disconnect with the brake chamber (F)；Characterized in that, set on the left of the steering valve core (4) and brake spool (7)
Block (9) is equipped with, oil duct is provided with block (9), steering valve core (4) is internally provided with oil pocket one (E) and connects the oil of oil pocket one (E)
Hole one (b), brake spool (7) are internally provided with connection oil pocket two (K), and connection oil pocket one (E) and connection oil pocket two (K) pass through block
(9) the oil duct connection in, steering valve core (4) right-hand member is provided with guide's oilhole, and steering valve core (4) puts in guide's oilhole.
2. hydraulic control braking in a turn valve according to claim 1, it is characterised in that the company of being provided with the right side of the turn-around chamber (B)
Logical fuel tank (20) unloads oil pocket (G), and steering valve core (4) axial movement can make the fuel tank (20) and the turn-around chamber (B) even
On-off is opened, and screw plug (5) is provided with the right side of steering valve core (4), and guide's oilhole runs through whole screw plug (5), steering valve core (4) right side
Axle (2) is provided with, axle (2) left end stretches out switching valve (1) to be fixed with block (9), and oil pocket one (E) is divided into two parts, and a part is set
Inside steering valve core (4) left end, another part runs through whole axle (2), and steering valve core (4) left end reaches the oil in axle (2)
In chamber one (E), axle (2) right-hand member is cased with spring (3), and the right-hand member and steering valve core (4) left end of axle (2) are stepped, spring (3)
One end is arranged on the shaft shoulder of axle (2), and the other end is arranged on the shaft shoulder of steering valve core (4).
3. hydraulic control braking in a turn valve according to claim 1, it is characterised in that be provided with reseting cavity in the brake valve (6)
(H), reseting cavity (H) the connection braking oil suction chamber (D)；The interior hydraulic oil of the reseting cavity (H) acts on the brake valve
The pressure direction of core (7), it is opposite with the pressure direction that the turn-around chamber (B) interior pressure oil is acted on the brake spool (7)；
One end of the brake spool (7) has the first blind hole, is fitted with plunger (8) in first blind hole, and the one of the plunger (8)
End is stretched out first blind hole and connected with the end of the brake valve (6) valve body, and the plunger (8) stretches out first blind hole
Part and the brake spool (7), valve body form the reseting cavity (H), the interior hydraulic oil of the reseting cavity (H) acts on described
On brake spool (7) at annular end face corresponding with first blind hole.
4. hydraulic control braking in a turn valve (6) according to claim 3, it is characterised in that the periphery of the brake spool (7) is set
Have an annular groove, the internal perisporium of the annular groove and the brake valve (6) forms restriction, the restriction connection is described brake into
Oil pocket (D) and the reseting cavity (H)；The area that the interior hydraulic oil of the oil pocket two (K) acts on the brake spool (7) is more than institute
The area that reseting cavity (H) interior hydraulic oil acts on the brake spool (7) is stated, the valve body of the brake valve (6) is provided with least
One drain tap.
5. a kind of hydraulic control braking in a turn system, including fuel tank (20), oil pump (30), left steering clutch (40), right turn clutch
Device (50), left brake (60) and right brake (70), pilot valve (80), turn to safety valve (90)；Also include left hydraulic control to turn to
Brake valve (100) and right hydraulic control braking in a turn valve (200), left hydraulic control braking in a turn valve (100) and right hydraulic control braking in a turn valve
(200) it is integrated on same valve body, it is characterised in that：The left hydraulic control braking in a turn valve (100) and right hydraulic control braking in a turn
Valve (200) is the hydraulic control braking in a turn valve (6) described in claim any one of 1-4.
6. a kind of hydraulic control braking in a turn valve, including switching valve (1) and brake valve (6), the switching valve (1) are provided with steering valve core
(4) turn-around chamber (B) of steering cluth is led to, the brake valve (6) includes brake spool (7), braking oil suction chamber (D) and led to
The brake chamber (F) of arrestment mechanism, brake spool (7) axial movement can make the braking oil suction chamber (D) and the braking
Chamber (F) is connected or disconnected；Characterized in that, it is provided with block (9), block on the left of the steering valve core (4) and brake spool (7)
(9) oil duct is provided with, the oil pocket one (E) through its left and right is set inside steering valve core (4), oil pocket one (E) is provided with oilhole
Two (a), oilhole two (a) other end connection turn-around chamber (B), brake spool (7) are internally provided with connection oil pocket two (K), connection oil
Chamber one (E) is connected with connection oil pocket two (K) by the oil duct in block (9).
7. hydraulic control braking in a turn valve according to claim 6, it is characterised in that the steering valve core (4) is integral formula,
And by being threadably mounted on switching valve (1) on the right side of steering valve core (4), steering valve core (4) right-hand member stretches out switching valve (1).
8. hydraulic control braking in a turn valve according to claim 6, it is characterised in that be provided with reseting cavity in the brake valve (6)
(H), reseting cavity (H) the connection braking oil suction chamber (D)；The interior hydraulic oil of the reseting cavity (H) acts on the brake valve
The pressure direction of core (7), it is opposite with the pressure direction that the turn-around chamber (B) interior pressure oil is acted on the brake spool (7).
One end of the brake spool (7) has the first blind hole, is fitted with plunger (8) in first blind hole, and the one of the plunger (8)
End is stretched out first blind hole and connected with the end of the brake valve (6) valve body, and the plunger (8) stretches out first blind hole
Part and the brake spool (7), valve body form the reseting cavity (H), the interior hydraulic oil of the reseting cavity (H) acts on described
On brake spool (7) at annular end face corresponding with first blind hole.
9. hydraulic control braking in a turn valve according to claim 8, it is characterised in that the periphery of the brake spool (7) is provided with
The internal perisporium of annular groove, the annular groove and the brake valve (6) forms restriction, and the restriction connects the braking oil-feed
Chamber (D) and the reseting cavity (H)；The interior hydraulic oil of the oil pocket two (K) acts on the area of the brake spool (7) more than described
Reseting cavity (H) interior hydraulic oil acts on the area of the brake spool (7), and the valve body of the brake valve (6) is provided with least one
Individual drain tap.
10. a kind of hydraulic control braking in a turn system, including fuel tank (20), oil pump (30), left steering clutch (40), right turn clutch
Device (50), left brake (60) and right brake (70), pilot valve (80), turn to safety valve (90)；Also include left hydraulic control to turn to
Brake valve (100) and right hydraulic control braking in a turn valve (200), left hydraulic control braking in a turn valve (100) and right hydraulic control braking in a turn valve
(200) it is integrated on same valve body, it is characterised in that：The left hydraulic control braking in a turn valve (100) and right hydraulic control braking in a turn
Valve (200) is the hydraulic control braking in a turn valve (6) described in claim any one of 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720778094.4U CN206826746U (en) | 2017-06-30 | 2017-06-30 | Hydraulic control braking in a turn valve and its hydraulic control braking in a turn system with the valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720778094.4U CN206826746U (en) | 2017-06-30 | 2017-06-30 | Hydraulic control braking in a turn valve and its hydraulic control braking in a turn system with the valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206826746U true CN206826746U (en) | 2018-01-02 |
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ID=60778373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720778094.4U Active CN206826746U (en) | 2017-06-30 | 2017-06-30 | Hydraulic control braking in a turn valve and its hydraulic control braking in a turn system with the valve |
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| Country | Link |
|---|---|
| CN (1) | CN206826746U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396388A (en) * | 2020-04-26 | 2020-07-10 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN112682531A (en) * | 2020-12-04 | 2021-04-20 | 河南航天液压气动技术有限公司 | Three-position four-way electromagnetic reversing valve |
-
2017
- 2017-06-30 CN CN201720778094.4U patent/CN206826746U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396388A (en) * | 2020-04-26 | 2020-07-10 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN111396388B (en) * | 2020-04-26 | 2022-03-29 | 山推工程机械股份有限公司 | Speed change valve group and gear shifting control system |
| CN112682531A (en) * | 2020-12-04 | 2021-04-20 | 河南航天液压气动技术有限公司 | Three-position four-way electromagnetic reversing valve |
| CN112682531B (en) * | 2020-12-04 | 2023-01-24 | 河南航天液压气动技术有限公司 | Three-position four-way electromagnetic reversing valve |
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