CN2642619Y - Interflow overflow valve - Google Patents
Interflow overflow valve Download PDFInfo
- Publication number
- CN2642619Y CN2642619Y CN 03277451 CN03277451U CN2642619Y CN 2642619 Y CN2642619 Y CN 2642619Y CN 03277451 CN03277451 CN 03277451 CN 03277451 U CN03277451 U CN 03277451U CN 2642619 Y CN2642619 Y CN 2642619Y
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- valve
- interflow
- oil
- oil outlet
- inlet
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Abstract
The utility model relates to an interflow overflow valve for vehicle hydraulic steering system, which consists of a one-way valve, an oil inlet valve, an overflow valve and a interflow valve; the interflow valve is provided with three working positions, namely a left oil outlet, a right oil outlet and an oil inlet; the oil inlet of the one-way valve and the oil inlet valve are connected with the oil outlet of the pre priority valve; the oil outlet of the one-way valve is connected with the oil inlet of a steering gear; the oil outlet of the oil inlet valve is connected with the oil inlet of the overflow valve; an overflow port of the oil inlet valve is connected with an oil tank of the system by the overflow valve; the left oil outlet of the interflow valve and the left oil outlet of the steering gear are connected with a left cavity of the steering oil cylinder; the right oil outlet of the interflow valve and the right oil outlet of the steering gear are connected with a right cavity of the steering oil cylinder. The utility model can work with common steering gears to realize hydraulic steering control; meanwhile, the structure is simple and the pressure loss of the system is little.
Description
Technical field
The utility model relates to a kind of interflow by pass valve that is used for the vehicle hydraulic steering swivel system.
Background technology
In the existing vehicle hydraulic steering swivel system, in order to satisfy stronger operation power requirement, general big discharge capacity deflector or the coaxial flow amplifying and steering device of adopting, as main hydraulic, loss of pressure is big during its work, increase consumption of power, and made working oil temperature higher, influenced the stability of system.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of simple in structure, and the interflow by pass valve that the system pressure loss is low makes it can cooperate common deflector to realize fluid-link steering control.
Interflow of the present utility model by pass valve is installed in the vehicle hydraulic steering swivel system, and its prime is connected with oil pump and the pressure-gradient control valve that is used to provide power, thereafter level be connected be used for moving output deflector and turn to oil cylinder.This interflow by pass valve is made up of a check valve, an inlet valve, a by pass valve and an interflow valve; Described interflow valve has the fuel-displaced and oil inlet of fuel-displaced, the right oil outlet of left oil outlet and cuts out three control positioies; The oil inlet of described check valve and inlet valve all is connected with the oil outlet of prime pressure-gradient control valve, the oil outlet of check valve is connected with the oil inlet of deflector, the oil outlet of inlet valve is connected with the oil inlet of interflow valve, and the outgate of inlet valve passes through by pass valve and is connected with the system fuel tank; The left oil outlet of interflow valve and the left oil outlet of deflector all are connected with the left chamber that turns to oil cylinder, and the right oil outlet of interflow valve and the right oil outlet of deflector all are connected with the right chamber that turns to oil cylinder.
Above-mentioned interflow valve can adopt slide-valve structure, it comprises a valve body and is arranged in the cylindrical spool of body cavity, described valve interior surface has three inner grooves side by side, wherein two of both sides inner groove places have hydraulic fluid port respectively as the left oil outlet of interflow valve and the right oil outlet of interflow valve, and the hydraulic fluid port that open in middle annular groove place is the oil inlet of interflow valve; The described valve core outer surface left and right sides has two outer grooves side by side, and the inner groove with above-mentioned both sides is relative respectively for they, and when spool was positioned at midway location, the jut at spool middle part can be with the inner groove sealing of centre; Left and right two ends at spool, inwardly recessed vertically, form interflow valve left side oil pocket and the right oil pocket of interflow valve, respectively have a stage clip to be installed between valve body and the spool in interflow valve left side oil pocket and the right oil pocket of interflow valve, valve left and right oil pocket in interflow also communicates with the outer groove of the left and right sides by the oil duct on the spool respectively.
Above-mentioned interflow valve also can adopt shuttle valve formula structure, it comprises a cylindrical cavity, the boss that two annulars are arranged on the inside face of inner chamber, with the annular boss is boundary, and inner chamber is divided into three parts, promptly left chamber, lumen and right chamber, a steel ball is arranged in lumen, its diameter is greater than the internal diameter of annular boss, and the hydraulic fluid port that has on the left and right chamber is interflow valve left side oil outlet and the right oil outlet of interflow valve, and the hydraulic fluid port that has on the lumen is interflow valve oil inlet.
The utility model is simple and reasonable, when using it in hydrostatic steering system, can be the steering oil oil supply cylinder jointly through deflector and interflow valve, has reduced the loss of pressure of oil circuit in deflector place, has reduced system power dissipation.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the structural representation of another embodiment of the utility model.
The specific embodiment
As shown in Figure 1 and Figure 2, interflow of the present utility model by pass valve is in the vehicle hydraulic steering swivel system, be installed in the deflector 3 of the oil pump 1 of prime and pressure-gradient control valve 2 and back level and turn between the oil cylinder 4, it is made up of a check valve 5, inlet valve 6, a by pass valve 7 and an interflow valve 8.The oil inlet of check valve 5 and inlet valve 6 all is connected with the oil outlet 9 of pressure-gradient control valve 2, the oil outlet 10 of check valve is connected with the oil inlet 11 of deflector 3, the oil outlet 12 of inlet valve is connected with interflow valve oil inlet 13, and the outgate 14 of inlet valve passes through by pass valves 7 and is connected with system fuel tank 15; The left oil outlet 16 of interflow valve and the left oil outlet 17 of deflector all are connected with the left chamber that turns to oil cylinder 4, and the right oil outlet 18 of interflow valve and the right oil outlet 19 of deflector all are connected with the right chamber that turns to oil cylinder 4.
In the embodiment shown in fig. 1, interflow valve 8 is a slide-valve structure, the surface of internal cavity of its valve body 20 has been arranged side by side three inner grooves 21, three inner groove places have a valve left side, interflow oil outlet 16, interflow valve oil inlet 13 and the right oil outlet 18 of interflow valve respectively, and spool 22 is provided with two outer grooves 23 relative with the inner groove 21 of and arranged on left and right sides, the spool two ends are respectively a valve left side, interflow oil pocket 24 and the right oil pocket 25 of interflow valve, and stage clip 26 is installed, valve left and right oil pocket in interflow is connected with two outer grooves 21 by oil duct 27 respectively.
Its working process is as follows: spool 22 is positioned at midway location during beginning, and the oil inlet 13 of interflow valve is closed, and the hydraulic oil of being exported by oil pump 1 and pressure-gradient control valve 2 is connected on the oil inlet 11 of deflector through check valve 5; In the time will carrying out left steering, deflector 3 by its left oil outlet 17 to the left chamber fuel feeding that turns to oil cylinder 4, part hydraulic oil enters in the inner groove 21 in valve body left side by the left oil outlet 16 of interflow valve simultaneously, enter into a valve left side, interflow oil pocket 24 through the outer groove 23 in spool left side and the oil duct 27 in left side again, promoting spool 22 moves right, passage between interflow valve oil inlet 13 and a valve left side, the interflow oil outlet 16 is opened, at this moment the hydraulic oil by oil pump 1 and pressure-gradient control valve 2 outputs just can converge through the left oil outlet 16 of inlet valve 6 and interflow valve and the hydraulic oil of deflector left side oil outlet 17 outputs, common to the left chamber fuel feeding that turns to oil cylinder 4, make to turn to oil cylinder 4 under bigger flow, to realize the left steering action; In the time will carrying out right steering, deflector 3 by its right oil outlet 19 to the right chamber fuel feeding that turns to oil cylinder 4, part hydraulic oil enters in the inner groove 21 on valve body right side by the right oil outlet 18 of interflow valve simultaneously, enter into the right oil pocket 25 of interflow valve through the outer groove 23 on spool right side and the oil duct 27 on right side again, promoting spool 22 is moved to the left, passage between interflow valve oil inlet 13 and the right oil outlet 18 of interflow valve is opened, at this moment the hydraulic oil by oil pump 1 and pressure-gradient control valve 2 outputs just can converge through the right oil outlet 18 of inlet valve 6 and interflow valve and the hydraulic oil of right oil outlet 19 outputs of deflector, common to the right chamber fuel feeding that turns to oil cylinder 4, make to turn to oil cylinder 4 to realize the right steering action.
In the embodiment shown in Figure 2, interflow valve 8 is a shuttle valve formula structure, in its columniform inner chamber, with annular boss 31 is boundary, be divided into left chamber 28,30 3 parts of lumen 29 and right chamber, a steel ball 32 is arranged in lumen, its diameter is greater than the internal diameter of annular boss 31, the hydraulic fluid port that has on the left and right chamber is a valve left side, interflow oil outlet 16 and the right oil outlet 18 of interflow valve, and the hydraulic fluid port that has on the lumen is interflow valve oil inlet 13.
Its working process is as follows: steel ball 32 is positioned at lumen 29 middle parts of interflow valve 8 during beginning, is in quick condition, and interflow valve oil inlet 13 is fuel feeding not; When left steering, deflector 3 by its left oil outlet 17 to the left chamber fuel feeding that turns to oil cylinder 4, part hydraulic oil enters the left chamber 28 of interflow valve by the left oil outlet 16 of interflow valve simultaneously, steel ball 32 is moved right, boss 31 closure of openings with the right side, at this moment the hydraulic oil exported of the left oil outlet 16 that just can pass through inlet valve 6, interflow valve oil inlet 13, interflow valve by the hydraulic oil of oil pump 1 and pressure-gradient control valve 2 outputs and the left oil outlet 17 of deflector converges, common to the left chamber fuel feeding that turns to oil cylinder 4, make to turn to oil cylinder 4 to finish the left steering action; When right steering, deflector 3 by its right oil outlet 19 to the right chamber fuel feeding that turns to oil cylinder 4, part hydraulic oil enters the right chamber 28 of interflow valve by the right oil outlet 18 of interflow valve simultaneously, steel ball 32 is moved to the left, boss 31 closure of openings with the left side, at this moment the hydraulic oil exported of the right oil outlet 18 that just can pass through inlet valve 6, interflow valve oil inlet 13, interflow valve by the hydraulic oil of oil pump 1 and pressure-gradient control valve 2 outputs and deflector right side oil outlet 19 converges, common to the right chamber fuel feeding that turns to oil cylinder 4, make to turn to oil cylinder 4 to realize the right steering action.
In two above-mentioned embodiment, when the deflector oil-feed, check valve 5 is opened, if high pressure oil flows backwards, check valve 5 ends, and prevents to cause high pressure oil to flow backwards owing to be subjected to external impact when normal direction of rotation.When the operation pressure that turns to oil cylinder 4 meets or exceeds the setting value of by pass valve 7, turn to the pressure in the oil cylinder 4 to enter the inlet valve oil pocket through the oil pocket of interflow valve, flow back to system's fuel tank by by pass valve again, realized the system pressure protection.
Claims (3)
1, a kind of interflow by pass valve, it is installed in the vehicle hydraulic steering swivel system, its prime is connected with oil pump (1) and the pressure-gradient control valve (2) that is used to provide power, thereafter level be connected be used for moving output deflector (3) and turn to oil cylinder (4), it is characterized in that: this interflow by pass valve is made up of a check valve (5), an inlet valve (6), a by pass valve (7) and an interflow valve (8); Described interflow valve (8) has the fuel-displaced and oil inlet of fuel-displaced, the right oil outlet of left oil outlet and cuts out three control positioies; The oil inlet of described check valve (5) and inlet valve (6) all is connected with the oil outlet (9) of prime pressure-gradient control valve, the oil outlet of check valve (10) is connected with the oil inlet (11) of deflector, the oil outlet of inlet valve (12) is connected with interflow valve oil inlet (13), and the outgate (14) of inlet valve (6) is connected with system's fuel tank (15) through by pass valve (7); The left oil outlet (16) of interflow valve and the left oil outlet (17) of deflector all are connected with the left chamber that turns to oil cylinder (4), and the right oil outlet (18) of interflow valve and the right oil outlet (19) of deflector all are connected with the right chamber that turns to oil cylinder (4).
2, interflow according to claim 1 by pass valve, it is characterized in that: described interflow valve (8) is a slide-valve structure, it comprises a valve body (20) and is arranged in the cylindrical spool (22) of body cavity, described valve interior surface has three inner grooves (21) side by side, wherein two of both sides inner groove places have hydraulic fluid port respectively as the left oil outlet (16) of interflow valve and the right oil outlet (18) of interflow valve, and the hydraulic fluid port that open in middle annular groove place is the oil inlet (13) of interflow valve; The outside face left and right sides of described spool (22) has two outer grooves (23) side by side, the inner groove (21) with above-mentioned both sides is relative respectively for they, when spool (22) when being positioned at midway location, the jut at spool middle part can be with inner groove (21) sealing of centre; The left and right two ends of spool (22), inwardly recessed vertically, form interflow valve left side oil pocket (24) and the right oil pocket (25) of interflow valve, respectively have a stage clip (26) to be installed between valve body and the spool in interflow valve left side oil pocket and the right oil pocket of interflow valve, valve left and right oil pocket in interflow also communicates with the outer groove (23) of the left and right sides by the oil duct on the spool (27) respectively.
3, interflow according to claim 1 by pass valve, it is characterized in that: described interflow valve (8) is shuttle valve formula structure, it comprises a cylindrical cavity, the boss (31) that two annulars are arranged on the inside face of inner chamber, with the annular boss is boundary, inner chamber is divided into three parts, be left chamber (28), lumen (29) and right chamber (30), a steel ball (32) is arranged in lumen, its diameter is greater than the internal diameter of annular boss, a left side, right chamber (28,30) hydraulic fluid port that has on is interflow valve left side oil outlet (16) and the right oil outlet (18) of interflow valve, and the hydraulic fluid port that has on the lumen (29) is interflow valve oil inlet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277451 CN2642619Y (en) | 2003-08-05 | 2003-08-05 | Interflow overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277451 CN2642619Y (en) | 2003-08-05 | 2003-08-05 | Interflow overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2642619Y true CN2642619Y (en) | 2004-09-22 |
Family
ID=34302813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03277451 Expired - Lifetime CN2642619Y (en) | 2003-08-05 | 2003-08-05 | Interflow overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2642619Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848194A (en) * | 2019-11-21 | 2020-02-28 | 徐州天睿地机械有限公司 | Externally-connected converging valve for mobile hydraulic power station |
-
2003
- 2003-08-05 CN CN 03277451 patent/CN2642619Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848194A (en) * | 2019-11-21 | 2020-02-28 | 徐州天睿地机械有限公司 | Externally-connected converging valve for mobile hydraulic power station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130805 Granted publication date: 20040922 |