CN204476903U - Locking selector valve - Google Patents
Locking selector valve Download PDFInfo
- Publication number
- CN204476903U CN204476903U CN201520026967.7U CN201520026967U CN204476903U CN 204476903 U CN204476903 U CN 204476903U CN 201520026967 U CN201520026967 U CN 201520026967U CN 204476903 U CN204476903 U CN 204476903U
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- valve
- spool
- valve pocket
- endoporus
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Abstract
The utility model discloses a kind of locking selector valve, it valve body at least one actuator port built with band endoporus valve pocket, valve pocket is provided with guide sleeve near one end of guiding valve, is provided with push rod in guide sleeve, and the guiding valve between push rod and filler opening is provided with the conical surface; Spool is provided with in valve pocket above push rod, position limit socket is provided with in valve pocket above spool, in the endoporus of spool bottom, be provided with pilot valve, between pilot valve and spool upper end, be provided with pilot valve Returnning spring, between spool and position limit socket, be provided with Returnning spring; Valve pocket is provided with axial bore, is provided with oil pocket in the valve pocket outside spool, is provided with annular chamber between valve pocket stage casing and valve body, is provided with lower radial hole and upper radial hole, is provided with radial damping hole in spool in valve pocket.The utility model without the need to strengthening steering force, ensure that handling comfort and No leakage when guiding valve resets, and be convenient to processing, easy accessibility, versatility are good.
Description
Technical field
The utility model relates to a kind of locking selector valve, especially for the locking selector valve in tractor hydraulic system.
Background technique
Tractor is the farm machinery of a kind of multipurpose, high efficiency, maneuverability, if change corresponding accessory, can carry out loosening the soil, plough, the operation such as harvesting.Traditional tractor is because of its economic serviceability, higher to the control of cost, so neither be very high to performance requirement, as long as can use.At present, the performance requirement of people to tractor is more and more higher, as handling comfort, Security etc., this just proposes new requirement to the selector valve in the hydraulic system of main frame: need the steering force solving many selector valves on the one hand, solves the quiet settling amount of hoist cylinder on the other hand, ensures No leakage.Tradition ensures the internal leakage of the simplest scheme control valve of quiet settling amount, reduces the matching gap of guiding valve and valve body, but need strengthen steering force for ensureing that guiding valve resets like this, reduces handling comfort; Another No leakage scheme is for increasing fluid-control one-way lock, but this scheme can increase the casting difficulty of valve body, and cost is high, and does not have versatility with general work valve body.
Summary of the invention
The purpose of this utility model is for prior art above shortcomings, provides a kind of locking selector valve, and it without the need to strengthening steering force, ensure that handling comfort and No leakage when guiding valve resets, and be convenient to processing, easy accessibility, versatility are good.
For achieving the above object, locking selector valve of the present utility model, comprise valve body, the filler opening be located in valve body, return opening, two actuator ports and guiding valve, it is characterized in that at the valve pocket of at least one actuator port built with band endoporus, it is the guide sleeve that gap is arranged that valve pocket to be provided with near one end of guiding valve with this actuator port front end in radial direction, that slides in guide sleeve is provided with push rod, the guiding valve between push rod and filler opening is provided with the conical surface raised gradually; That slides in the valve pocket above push rod is provided with spool, fixing position limit socket is provided with in valve pocket above spool, spool is provided with the sealing surface coordinated with valve pocket, endoporus is provided with in spool bottom, pilot valve is provided with in endoporus, between pilot valve and spool upper end, be provided with pilot valve Returnning spring, between spool and position limit socket, be provided with Returnning spring; Valve pocket is provided with the axial bore being communicated with spool ante-chamber and the outer actuator port of guide sleeve, oil pocket was provided with in valve pocket outside spool, annular chamber is provided with between valve pocket stage casing and valve body, be provided with in valve pocket and be communicated with the lower radial hole of oil pocket with annular chamber and the upper radial hole of the valve pocket endoporus be communicated with outside position limit socket and annular chamber, in spool, be provided with the radial damping hole being communicated with oil pocket and spool endoporus.
Working principle of the present utility model is:
1, forward is unblanked: when mobile guiding valve makes filler opening connect with the actuator port front end that valve pocket is housed, pressure oil enters spool ante-chamber by the axial bore of valve pocket, overcome action of reset spring power, push spool open, pressure oil arrived the back cavity of position limit socket after passing through oil pocket, lower radial hole, the annular chamber between valve pocket and valve body, upper radial hole, enter actuator by the endoporus rear end of valve pocket;
2, reverse unlocking: actuator's oil cylinder comes the oily endoporus rear end first arriving valve pocket, again by upper radial hole, annular chamber, lower radial hole arrived oil pocket, spool endoporus is entered again by radial damping hole, now guiding valve is promoted to the return opening side that actuator port is corresponding, the conical surface on guiding valve drives push rod up to walk, back down pilot valve, now fluid flows into spool ante-chamber from spool endoporus, pass through axial bore again, actuator port front end enters corresponding return opening, due to fluid flowing, pressure reduction is produced when flowing through the radial damping hole on spool, thus cavity pressure is greater than action of reset spring power and makes spool move up before making spool, cross oil pocket to be directly communicated with spool ante-chamber, realize reverse auto-unlocking, without the need to External Force Acting,
3, neutral position: when meta got back to by guiding valve, oil circuit blocks, before and after spool, cavity pressure value is equal, and now spool resets under the effect of Returnning spring, makes sealing surface return seat on the seamed edge of valve pocket, reaches leak free object
The utility model to be coordinated with valve pocket by spool and realizes No leakage, and guiding valve and valve body, without the need to reducing matching gap, when guiding valve resets without the need to strengthening steering force, ensure that handling comfort; Newly-increased parts are loaded in actuator port, little to the change of valve body, be convenient to processing, versatility is good;
As further improvement of the utility model, valve pocket is loaded in actuator port by screw thread; Easy accessibility;
As further improvement of the utility model, be provided with the spacing plug screw contacted with position limit socket in the valve pocket endoporus above position limit socket by screw thread, spacing plug screw is provided with axial bore; By the position of spacing plug screw adjustable position limit socket, thus the cracking pressure of regulating spool, its axial bore can ensure the unimpeded of oil circuit;
As further improvement of the utility model, be provided with damping plug in spool upper end by screw thread, be provided with axial damping hole in damping plug, between position limit socket and valve pocket and between valve pocket and valve body, be equipped with seal ring; Axial damping hole can realize buffering when spool is opened;
In sum, the utility model without the need to strengthening steering force, ensure that handling comfort and No leakage when guiding valve resets, and be convenient to processing, easy accessibility, versatility are good.
Accompanying drawing explanation
Fig. 1 is the plan view of the utility model embodiment.
Fig. 2 is the plan view of the utility model embodiment forward when unblanking.
Plan view when Fig. 3 is the utility model embodiment reverse unlocking.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1 to Figure 3, this locking selector valve, comprise valve body 1, the filler opening 2 be located in valve body 1, return opening 3, two actuator port and guiding valve 4, the valve pocket 5 of band endoporus is housed by screw thread in an actuator port 6 wherein, it is the guide sleeve 7 that gap is arranged that valve pocket 5 to be provided with near one end of guiding valve 4 with this actuator port front end in radial direction, that slides in guide sleeve 7 is provided with push rod 8, the guiding valve 4 between push rod 8 and filler opening 2 is provided with the conical surface 4a raised gradually, that slides in the valve pocket 5 above push rod 8 is provided with spool 9, position limit socket 10 is provided with in valve pocket 5 above spool 9, be provided with the spacing plug screw 11 contacted with position limit socket 10 by screw thread in valve pocket endoporus above position limit socket 10, with fixing position limit socket 10, spacing plug screw 11 is provided with axial bore 12, spool 9 is provided with the conical seal (contact) face coordinated with valve pocket 5, endoporus is provided with in spool 9 bottom, pilot valve 13 is provided with in endoporus, damping plug 15 is provided with by screw thread in spool 9 upper end, axial damping hole 16 is provided with in damping plug 15, pilot valve Returnning spring 17 is provided with between pilot valve 13 and the damping plug 15 of spool upper end, Returnning spring 18 is provided with between spool 9 and position limit socket 10, valve pocket 5 is provided with the axial bore 19 of the actuator port be communicated with outside spool ante-chamber and guide sleeve 7, oil pocket 20 was provided with in valve pocket 5 outside spool 9, annular chamber 21 is provided with between valve pocket 5 stage casing and valve body 1, be provided with in valve pocket 5 and be communicated with the lower radial hole 22 of oil pocket 20 with annular chamber 21 and the upper radial hole 23 of the valve pocket endoporus be communicated with outside position limit socket 10 and annular chamber 21, in spool 9, be provided with the radial damping hole 26 being communicated with oil pocket 20 and spool 9 endoporus, seal ring 27 or 28 is equipped with between position limit socket 10 and valve pocket 5 and between valve pocket 5 and valve body 1.
Working principle of the present utility model is:
1, forward is unblanked: as shown in Figure 2, when being moved to the left guiding valve 4, filler opening 2 and actuator port 6 front end are connected, pressure oil enters spool ante-chamber by the axial bore 19 of valve pocket 5, overcome the active force of Returnning spring 18, push spool 9 open, pressure oil arrived the back cavity of position limit socket after passing through oil pocket 20, lower radial hole 22, annular chamber 21, upper radial hole 23, then entered actuator through axial bore 12 by the endoporus rear end of valve pocket 5;
2, reverse unlocking: as shown in Figure 3, actuator's oil cylinder comes the oily endoporus rear end first arriving valve pocket 5, again by axial bore 12, upper radial hole 23, annular chamber 21, lower radial hole 22 arrived oil pocket 20, spool endoporus is entered again by radial damping hole 26, now return opening 3 side of guiding valve 4 to actuator port 6 correspondence is promoted, conical surface 4a on guiding valve 4 drives push rod 8 up to walk, back down pilot valve 13, now fluid flows into spool ante-chamber from spool endoporus, again by axial bore 19, actuator port 6 front end enters corresponding return opening 3, due to fluid flowing, pressure reduction is produced when flowing through the radial damping hole 26 on spool 9, thus cavity pressure is greater than the active force of Returnning spring 18 and makes spool 9 move up before making spool, cross oil pocket 20 to be directly communicated with spool ante-chamber, realize reverse auto-unlocking, without the need to External Force Acting,
3, neutral position: when meta got back to by guiding valve 4, oil circuit blocks, and before and after spool 9, cavity pressure value is equal, and now spool 9 resets under the effect of Returnning spring 18, makes sealing surface return seat on the seamed edge of valve pocket 5, realizes sealing, reaches leak free object;
The utility model to be coordinated with valve pocket 5 by spool 9 and realizes No leakage, and guiding valve 4 and valve body 1, without the need to reducing matching gap, when guiding valve 4 resets without the need to strengthening steering force, ensure that handling comfort; Newly-increased parts are loaded in actuator port 6, little to the change of valve body 1, be convenient to processing, versatility is good; By the position of spacing plug screw 11 adjustable position limit socket 10, thus the cracking pressure of regulating spool 9; Axial damping hole 16 can realize buffering when spool is opened;
The utility model is not limited to above-mentioned mode of execution, as according to operating mode, can all arrange valve pocket and inner member in two actuator ports.
Claims (4)
1. a locking selector valve, comprise valve body, the filler opening be located in valve body, return opening, two actuator ports and guiding valve, it is characterized in that at the valve pocket of at least one actuator port built with band endoporus, it is the guide sleeve that gap is arranged that valve pocket to be provided with near one end of guiding valve with this actuator port front end in radial direction, that slides in guide sleeve is provided with push rod, the guiding valve between push rod and filler opening is provided with the conical surface raised gradually; That slides in the valve pocket above push rod is provided with spool, fixing position limit socket is provided with in valve pocket above spool, spool is provided with the sealing surface coordinated with valve pocket, endoporus is provided with in spool bottom, pilot valve is provided with in endoporus, between pilot valve and spool upper end, be provided with pilot valve Returnning spring, between spool and position limit socket, be provided with Returnning spring; Valve pocket is provided with the axial bore being communicated with spool ante-chamber and the outer actuator port of guide sleeve, oil pocket was provided with in valve pocket outside spool, annular chamber is provided with between valve pocket stage casing and valve body, be provided with in valve pocket and be communicated with the lower radial hole of oil pocket with annular chamber and the upper radial hole of the valve pocket endoporus be communicated with outside position limit socket and annular chamber, in spool, be provided with the radial damping hole being communicated with oil pocket and spool endoporus.
2. locking selector valve as claimed in claim 1, is characterized in that valve pocket is loaded in actuator port by screw thread.
3. locking selector valve as claimed in claim 1 or 2, it is characterized in that being provided with by screw thread the spacing plug screw contacted with position limit socket in the valve pocket endoporus above position limit socket, spacing plug screw is provided with axial bore.
4. locking selector valve as claimed in claim 1 or 2, is characterized in that being provided with damping plug in spool upper end by screw thread, is provided with axial damping hole, between position limit socket and valve pocket and between valve pocket and valve body, is equipped with seal ring in damping plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026967.7U CN204476903U (en) | 2015-01-15 | 2015-01-15 | Locking selector valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026967.7U CN204476903U (en) | 2015-01-15 | 2015-01-15 | Locking selector valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476903U true CN204476903U (en) | 2015-07-15 |
Family
ID=53632694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520026967.7U Active CN204476903U (en) | 2015-01-15 | 2015-01-15 | Locking selector valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204476903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653537A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Lockable reversing valve |
-
2015
- 2015-01-15 CN CN201520026967.7U patent/CN204476903U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653537A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Lockable reversing valve |
| CN104653537B (en) * | 2015-01-15 | 2017-01-11 | 四川长江液压件有限责任公司 | Lockable reversing valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |