CN104776075A - Hydraulic valve and loader including same - Google Patents
Hydraulic valve and loader including same Download PDFInfo
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- CN104776075A CN104776075A CN201410016430.2A CN201410016430A CN104776075A CN 104776075 A CN104776075 A CN 104776075A CN 201410016430 A CN201410016430 A CN 201410016430A CN 104776075 A CN104776075 A CN 104776075A
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- port
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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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a hydraulic valve (1). The hydraulic valve (1) comprises a shell (3), an outer valve element (20) which is mounted in a columnar cavity of the shell (3) and can move in the longitudinal direction, and an inner valve element (10) which is coaxially mounted in an inner hole of the outer valve element (20) and can move in the longitudinal direction. The hydraulic valve is characterized in that the outer valve element (20) and the inner valve element (10) are arranged to be controlled to move in the longitudinal direction through pilot pressure. The invention further relates to a loader including the hydraulic valve.
Description
Technical field
The present invention relates to a kind of hydrovalve, relate more specifically to a kind of hydrovalve with double spool.The invention still further relates to a kind of loader comprising this hydrovalve.
Background technique
Loader is a kind of restoration in earth-rock construction machinery being widely used in highway and railway construction, construction industry and coal, mining etc., typical loader usually comprises traveling gear and equipment, and the material spading of loader and handling operation are completed by equipment.The equipment of loader mainly comprises swing arm and scraper bowl, and the hydraulic system of loader supplies hydraulic fluid respectively to the oil hydraulic cylinder be associated with swing arm and scraper bowl, realizes different actions thus, comprises that shovel digs, discharging etc. tumbled by moved arm lifting or decline, scraper bowl.
Specifically, the hydraulic system of loader comprises the lifting hydraulic cylinder for controlling moved arm lifting or decline and the bucket hydraulic cylinder for controlling scraper bowl.Hydraulic fluid from working pump can be directed into the one in the rod chamber of lifting hydraulic cylinder or rodless cavity by the first selector valve, the hydraulic fluid from the another one in the rod chamber of lifting hydraulic cylinder or rodless cavity can return fuel tank.In addition, hydraulic fluid from working pump can be directed into the one in the rod chamber of bucket hydraulic cylinder or rodless cavity independently by the second selector valve with the first selector valve, the hydraulic fluid from the another one in the rod chamber of bucket hydraulic cylinder or rodless cavity can return fuel tank.First selector valve can change the direction flowing to lifting hydraulic cylinder or the hydraulic fluid from lifting hydraulic cylinder outflow, thus controls elongating or shortening of lifting hydraulic cylinder piston rod, controls lifting or the decline of swing arm thus.Second selector valve can change the direction of hydraulic fluid flowing to bucket hydraulic cylinder or flow out from bucket hydraulic cylinder, thus controls elongating or shortening of bucket hydraulic cylinder piston rod, controls the action of scraper bowl thus, comprises that shovel digs, discharging etc.This hydraulic system of loader is owing to comprising two independently selector valves, and therefore volume and weight is comparatively large usually, and manufacture cost is therefore also higher.
The present invention is intended to improve the hydraulic system of the loader of prior art, reduces the manufacture cost of loader further.
Summary of the invention
According to an aspect of the present invention, provide a kind of hydrovalve, it comprises housing, be arranged in the cylindrical chamber of housing and can movement along the longitudinal direction outer spool and be co-axially mounted on outer spool endoporus in and can the inner spool of movement along the longitudinal direction, it is characterized in that, described outer spool and inner spool are configured by pilot pressure and control described outer spool and inner spool movement along the longitudinal direction.
According to a further aspect in the invention, a kind of loader comprising above-mentioned hydrovalve is provided.
Accompanying drawing explanation
Fig. 1 is the general illustration that hydrovalve of the present invention is shown;
Fig. 2 is the sectional view intercepted along the horizontal plane comprising the inner spool of hydrovalve and the common axis of outer spool, and wherein inner spool and outer spool are all in meta;
Fig. 3 A is the sectional view intercepted along the horizontal plane identical with Fig. 2, and its China and foreign countries' spool is in meta, and inner spool is in right position;
Fig. 3 B is the sectional view of the vertical plane intercepting along the common axis comprising inner spool and outer spool, and its China and foreign countries' spool is in meta, and inner spool is in right position;
Fig. 4 A is the sectional view intercepted along the horizontal plane identical with Fig. 2, and its China and foreign countries' spool is in meta, and inner spool is in left position;
Fig. 4 B is the sectional view intercepted along the vertical plane identical with Fig. 3 B, and its China and foreign countries' spool is in meta, and inner spool is in left position;
Fig. 5 is the sectional view intercepted along the vertical plane identical with Fig. 3 B, and its China and foreign countries' spool and inner spool are all in left position;
Fig. 6 is the sectional view intercepted along the vertical plane identical with Fig. 3 B, and its China and foreign countries' spool and inner spool are all in right position; With
Fig. 7 is the schematic block diagram of hydrovalve of the present invention.
Embodiment
In this manual, for hydrovalve is placed on a horizontal plane with the state that its spool is horizontal about the description of " level ", " vertically ", description about "left", "right" is for the direction shown in each accompanying drawing, relevant description is only used to clearly demonstrate object of the present invention, and should not be construed as the restriction of working as any discomfort of hydrovalve of the present invention.
Fig. 1 illustrates the schematic diagram according to hydrovalve 1 of the present invention.Hydrovalve 1 comprises housing 3 generally, can be used for receiving from the hydraulic fluid of operation pump (not shown) the first port P, the 3rd port A1 that can be used for the second port T be communicated with hydraulic fluid tank fluid, the rod chamber that can be used for being connected respectively to the first oil hydraulic cylinder and rodless cavity and the 4th port B1 and can be used for being connected respectively to the rod chamber of the second oil hydraulic cylinder and the five-port A2 of rodless cavity and the 6th port B2.In one embodiment, the first oil hydraulic cylinder can be the lifting hydraulic cylinder for controlling moved arm lifting or decline of loader, and the second oil hydraulic cylinder can be the bucket hydraulic cylinder for controlling scraper bowl of loader.Should be appreciated that the first and second oil hydraulic cylinders mentioned can be the oil hydraulic cylinders that can realize any other controlling functions here.
Fig. 2 is the horizontal sectional view of the hydrovalve 1 of Fig. 1.As shown in Figure 2, hydrovalve 1 to comprise in the cylindrical chamber being arranged on housing 3 and can movement along the longitudinal direction outer spool 20 and be co-axially mounted on outer spool 20 endoporus in and can the inner spool 10 of movement along the longitudinal direction.The right-hand member of outer spool 20 is connected with the shoulder 32 of housing 3 by a Returnning spring (not shown), and its left end is connected with holder 34 by a Returnning spring (not shown), and holder 34 is such as bolted on the respective end of housing 3.Outer spool 20 by Returnning spring by towards its bit positions bias voltage.The right-hand member of housing 3 is provided with Cover members 5, the other end cover (not shown) is provided with in the left side of housing 3, so that confining liquid pressure valve 1, form the first pilot pressure chamber 30 at the right-hand member of cylindrical chamber thus, form the second pilot pressure chamber 40 at the left end of cylindrical chamber.The left end of inner spool 10 has the section 7 of a diameter reduction, this section 7 is provided with unshowned spring element link together and be preloaded two holding members 71 and 72, first holding member 71 is resisted against on described the other end cover, and the second holding member 72 is resisted against on the shoulder 15 of inner spool 10.Inner spool 10 by spring element by towards its bit positions bias voltage.
In horizontal section as shown in Figure 2, outer spool 20 comprises the first paired opening 21 and the second paired opening 22 that arrange relative to the axisymmetrical of outer spool along the longitudinal direction, inner spool 10 has the section that 3 diameters reduce along the longitudinal direction, form 3 circular grooves along inner spool 10 thus, be specially the first circular groove 11, second circular groove 12 and the 3rd circular groove 13.
In the vertical section vertical with the horizontal section shown in Fig. 2, for example, see Fig. 3 B, outer spool 20 comprises paired the 3rd opening 23, the 4th paired opening 24 and the 5th paired opening 25 that arrange relative to the axisymmetrical of outer spool along the longitudinal direction.Observe along the longitudinal direction, the first opening 21 is between the 3rd opening 23 and the 4th opening 24, and the second opening 22 is between the 4th opening 24 and the 5th opening 25.
In addition, such as shown in Figure 3 B, symmetrically arranged the 3rd opening 23, the 4th opening 24 and the 5th opening 25 be in pairs respectively formed on the outer surface of outer spool 20 correspondingly in pairs in symmetrically arranged 3rd depressed part 231, the 4th depressed part 241 and the 5th depressed part 251, the function of described depressed part will be described with reference to Fig. 5 and Fig. 6 below.
When each opening on outer spool 20 is constructed such that proper outer spool 20 is in bit positions as shown in Figure 2, first opening 21 is communicated with the 4th port B1 fluid of hydrovalve 1, second opening 22 is communicated with the 3rd port A1 fluid, 3rd opening 23 is communicated with the second port T fluid, 4th opening 24 is communicated with the first port P fluid, and the path leading to five-port A2 and the 6th port B2 from housing 3 inside is blocked by the wall of outer spool 20.
Working state shown in Fig. 2, inner spool 10 and outer spool 20 are both in their respective bit positions.Now, the first port P is not communicated with any one fluid in the 6th port B2 with the 3rd port A1, the 4th port B1, five-port A2.
Fig. 3 A and Fig. 3 B illustrates the working state of the hydrovalve 1 that pilot pressure is corresponding when being supplied in the second pilot pressure chamber 40.Wherein, Fig. 3 A is the sectional view of the horizontal plane intercepting along the common axis comprising inner spool 10 and outer spool 20, and Fig. 3 B is the sectional view of the vertical plane intercepting along the common axis comprising inner spool 10 and outer spool 20.
As shown in figs.3 a and 3b, when pilot pressure is supplied in the second pilot pressure chamber 40, this pilot pressure acts on the left side 50 of inner spool 10, promotes inner spool 10 and moves right to its right position.Outer spool 20 remains on meta.Now, the first opening 21 of outer spool 20 is connected with the 3rd opening 23 fluid by the first circular groove 11 of inner spool 10, and the second opening 22 of outer spool 20 is connected with the 4th opening 24 fluid by the second circular groove 12 of inner spool 10.Therefore, first port P of hydrovalve 1 is communicated with the 3rd port A1 fluid via the 4th opening 24 of outer spool 20, the second circular groove 12 of inner spool 10, the second opening 22 of outer spool 20 successively, and the 4th port B1 is communicated with the second port T fluid via the first opening 21 of outer spool 20, the first circular groove 11 of inner spool 10, the 3rd opening 23 of outer spool 20 successively.
Fig. 4 A and Fig. 4 B illustrates the working state of the hydrovalve 1 that pilot pressure is corresponding when being supplied in the first pilot pressure chamber 30.Wherein, Fig. 4 A is the sectional view intercepted along the horizontal plane identical with Fig. 3 A, and Fig. 4 B is the sectional view intercepted along the vertical plane identical with Fig. 3 B.
As illustrated in figures 4 a and 4b, when pilot pressure is supplied in the first pilot pressure chamber 30, this pilot pressure acts on the right side 52 of inner spool 10, promotes inner spool 10 and is moved to the left to its left position.Outer spool 20 remains on meta.Now, the first opening 21 of outer spool 20 is connected with the 4th opening 24 fluid by the second circular groove 12 of inner spool 10, and the second opening 22 of outer spool 20 is connected with the 5th opening 25 fluid by the 3rd circular groove 13 of inner spool 10.Therefore, first port P of hydrovalve 1 is communicated with the 4th port B1 fluid via the 4th opening 24 of outer spool 20, the second circular groove 12 of inner spool 10, the first opening 21 of outer spool 20 successively, and the 3rd port A1 is communicated with the second port T fluid via the second opening 22 of outer spool 20, the 3rd circular groove 13 of inner spool 10, the 5th opening 25 of outer spool 20 successively.
Fig. 5 illustrates the vertical section figure identical with Fig. 3 B.In the working state shown in Fig. 5, on the one hand, pilot pressure is supplied in the first pilot pressure chamber 30, and this pilot pressure acts on the right side 52 of inner spool 10, promotes inner spool 10 and is moved to the left to its left position.On the other hand, pilot pressure is also supplied in the chamber 60 jointly limited by the right side 27 of stop member 54, housing 3, inner spool 10 and outer spool 20, thus outer spool 20 is moved to the left to its left position.By making outer spool 20 move to left position, the path leading to the 3rd port A1 and the 4th port B1 from housing 3 inside blocks by the wall of outer spool 20.When inner spool 10 is in left position and outer spool 20 is in left position, first port P successively via being positioned at the 4th depressed part 241 of the same side with the first port P, the 4th opening 24, second circular groove 12, the 4th opening 24 being positioned at opposite side, the 4th depressed part 241 be communicated with the 6th port B2 fluid, five-port A2 successively via being positioned at the 5th depressed part 251 of the same side with five-port A2, the 5th opening 25, the 3rd circular groove 13, the 5th opening 25 being positioned at opposite side, the 5th depressed part 251 be communicated with the second port T fluid.
Fig. 6 illustrates the vertical section figure identical with Fig. 3 B.In the working state shown in Fig. 6, on the one hand, pilot pressure is supplied in the second pilot pressure chamber 40, and this pilot pressure acts on the left side 50 of inner spool 10, promotes inner spool 10 and moves right to its right position.On the other hand, pilot pressure is also supplied in the chamber 70 jointly limited by the left side 28 of stop member 56, housing 3, inner spool 10 and outer spool 20, thus outer spool 20 is moved right to its right position.By making outer spool 20 move to right position, the path leading to the 3rd port A1 and the 4th port B1 from housing 3 inside blocks by the wall of outer spool 20.When inner spool 10 is in right position and outer spool 20 is in right position, first port P successively via being positioned at the 4th depressed part 241 of the same side with the first port P, the 4th opening 24, second circular groove 12, the 4th opening 24 being positioned at opposite side, the 4th depressed part 241 be communicated with five-port A2 fluid, the 6th port B2 successively via being positioned at the 3rd depressed part 231 of the same side with the 6th port B2, the 3rd opening 23, first circular groove 11, the 3rd opening 23 being positioned at opposite side, the 3rd depressed part 231 be communicated with the second port T fluid.
Preferably, 3rd depressed part 231, the 4th depressed part 241 and the 5th depressed part 251 are designed to arc, when moving under the effect of outer spool 20 at pilot pressure, the changes in flow rate of hydraulic fluid changes smoothly thus, instead of suddenly increase or reduce, thus carry out with making the smooth operation of hydrovalve.
Industrial usability
The cooperation between the inner spool of coaxial setting and outer spool is passed through according to hydrovalve of the present invention, single hydrovalve can be utilized to complete control to two oil hydraulic cylinders, thus reduce the volume and weight of hydraulic system, significantly reduce the manufacture cost of the machine comprising this hydraulic system.The operation of hydrovalve of the present invention is described for loader below.Should be understood that, hydrovalve of the present invention is applicable to any machine needing to control two or more oil hydraulic cylinders.
Fig. 7 schematically shows the working principle of hydrovalve 1 of the present invention.In the present embodiment, the 3rd port A1 and the 4th port B1 are connected with the rod chamber of the lifting hydraulic cylinder of loader and rodless cavity fluid respectively, and five-port A2 and the 6th port B2 are connected with the rod chamber of the bucket hydraulic cylinder of loader and rodless cavity fluid respectively.First port P with for being connected to the pump fluid of lifting hydraulic cylinder or bucket hydraulic cylinder supplying hydraulic fluid.Second port T with hydraulic fluid tank as fuel tank fluid is connected.Hydrovalve 1 is for being optionally directed to rodless cavity or the rod chamber of lifting hydraulic cylinder by the hydraulic fluid by described pump pumping, elongate or shorten to make the piston rod of lifting hydraulic cylinder, thus control lifting or the decline of the swing arm of loader, or optionally the hydraulic fluid by described pump pumping is directed to rodless cavity or the rod chamber of bucket hydraulic cylinder, elongate or shorten to make the piston rod of bucket hydraulic cylinder, thus control the action of scraper bowl of loader, comprise that shovel digs, discharging etc.
Hydrovalve 1 can operate under following several working state:
At the first working state (see Fig. 2): the outer spool 20 of hydrovalve 1 and inner spool 10 are all in their bit positions, now, hydraulic fluid is not had to be supplied to bucket hydraulic cylinder and lifting hydraulic cylinder, therefore, there is not action in both bucket hydraulic cylinder and lifting hydraulic cylinder, correspondingly, the scraper bowl of loader and swing arm keep static.
At the second working state (see Fig. 3 A and 3B): pilot pressure is supplied in the second pilot pressure chamber 40, inner spool 10 is made therefrom to move to right position in position.Outer spool 20 remains on meta.Now, the first port P of hydrovalve 1 is communicated with the 3rd port A1 fluid, and the second port T is communicated with the 4th port B1 fluid, and the path leading to five-port A2 and the 6th port B2 from housing 3 inside is blocked.From the first port P of hydraulic fluid by hydrovalve 1 and the rod chamber of the 3rd port A1 arrival lifting hydraulic cylinder of described pump, the hydraulic fluid in the rodless cavity of lifting hydraulic cylinder flows back to fuel tank by the 4th port B1 and the second port T.Result is that the piston rod of lifting hydraulic cylinder shortens, and drives swing arm to carry out down maneuver.
At the 3rd working state (see Fig. 4 A and 4B): pilot pressure is supplied in the first pilot pressure chamber 30, inner spool 10 is made therefrom to move to left position in position.Outer spool 20 remains on meta.Now, the first port P of hydrovalve 1 is communicated with the 4th port B1 fluid, and the second port T is communicated with the 3rd port A1 fluid, and the path leading to five-port A2 and the 6th port B2 from housing 3 inside is blocked.From the first port P of hydraulic fluid by hydrovalve 1 and the rodless cavity of the 4th port B1 arrival lifting hydraulic cylinder of described pump, the hydraulic fluid in the rod chamber of lifting hydraulic cylinder flows back to fuel tank by the 3rd port A1 and the second port T.Result is that the piston rod of lifting hydraulic cylinder extends, and drives swing arm to carry out lifting action.
In the 4th working state (see Fig. 5): make outer spool 20 and inner spool 10 move to its respective position, left position respectively by pilot pressure.Now, the first port P of hydrovalve 1 is communicated with the 6th port B2 fluid, and the second port T is communicated with five-port A2 fluid, and the path leading to the 3rd port A1 and the 4th port B1 from housing 3 inside is blocked.From the first port P of hydraulic fluid by hydrovalve 1 and the rodless cavity of the 6th port B2 arrival bucket hydraulic cylinder of described pump, the hydraulic fluid in the rod chamber of bucket hydraulic cylinder flows back to fuel tank by five-port A2 and the second port T.Result is that the piston rod of bucket hydraulic cylinder extends, and drives scraper bowl to carry out such as spading or reach action.
In the 5th working state (see Fig. 6): make outer spool 20 and inner spool 10 move to its respective position, right position respectively by pilot pressure.Now, the first port P of hydrovalve 1 is communicated with five-port A2 fluid, and the second port T is communicated with the 6th port B2 fluid, and the path leading to the 3rd port A1 and the 4th port B1 from housing 3 inside is blocked.From the first port P of hydraulic fluid by hydrovalve 1 and the rod chamber of five-port A2 arrival bucket hydraulic cylinder of described pump, the hydraulic fluid in the rodless cavity of bucket hydraulic cylinder flows back to fuel tank by the 6th port B2 and the second port T.Result is that the piston rod of bucket hydraulic cylinder shortens, and drives the actions such as scraper bowl such as dumps.
Finally, when acting on the pilot pressure on outer spool 20 and/or inner spool 10 and being released, outer spool 20 and/or inner spool 10 return their respective bit positions under the bias voltage of corresponding spring assembly.
Therefore, the control of bucket hydraulic cylinder to loader and lifting hydraulic cylinder can be realized by hydrovalve 1 of the present invention, thus complete the operation desired by operator of loader.With use in prior art two independently selector valve control bucket hydraulic cylinder respectively and compare with lifting hydraulic cylinder, hydrovalve 1 of the present invention makes the volume and weight of hydraulic system reduce, thus significantly reduces the manufacture cost of loader.
By specific embodiment, hydrovalve of the present invention is described above.It will be readily apparent to one skilled in the art that and can make multiple change and distortion to hydrovalve of the present invention without departing from the present invention in the case of the inventive idea.Such as, only exemplary to the explanation of the opening on the circular groove on inner spool and outer spool above, other arrangement of circular groove and opening and size, profile design are also fine, as long as its fluid that can realize between each port mentioned above is communicated with.In conjunction with to the consideration of specification and the practice of disclosed hydrovalve, other embodiment will be apparent to those skilled in the art.Specification and example are only regarded as exemplary, and real scope is represented by claims and their equivalent.
Claims (12)
1. a hydrovalve (1), comprise housing (3), be arranged in the cylindrical chamber of housing (3) and can movement along the longitudinal direction outer spool (20) and be co-axially mounted on outer spool (20) endoporus in and can the inner spool (10) of movement along the longitudinal direction, it is characterized in that, described outer spool (20) and inner spool (10) are configured by pilot pressure and control described outer spool (20) and inner spool (10) movement along the longitudinal direction.
2. hydrovalve according to claim 1, is characterized in that, pilot pressure can act on the relative end of two of described outer spool (20), and pilot pressure can act on the relative end of two of described inner spool (10).
3. hydrovalve according to claim 1, is characterized in that, described outer spool (20) and inner spool (10) each via spring assembly by the direction bias voltage towards their neutral position.
4. hydrovalve according to claim 3, it is characterized in that, described hydrovalve (1) comprise for receive from the hydraulic fluid of oil hydraulic pump the first port (P), for be communicated with hydraulic fluid tank fluid the second port (T), for the 3rd port (A1) of the rod chamber and rodless cavity that are connected respectively to the first oil hydraulic cylinder and the 4th port (B1) and for the five-port (A2) of the rod chamber that is connected respectively to the second oil hydraulic cylinder and rodless cavity and the 6th port (B2).
5. hydrovalve according to claim 4, it is characterized in that, when described outer spool (20) and inner spool (10) are all in neutral position, described first port (P) is not communicated with any one fluid in the 6th port (B2) with described 3rd port (A1), the 4th port (B1), five-port (A2).
6. hydrovalve according to claim 4, it is characterized in that, when described outer spool (20) is positioned at neutral position, described inner spool (10) can move to primary importance from neutral position under the effect of pilot pressure, described first port (P) is communicated with the 4th port (B1) fluid, described second port (T) is communicated with described 3rd port (A1) fluid, and the path leading to described five-port (A2) and the 6th port (B2) is blocked.
7. hydrovalve according to claim 4, it is characterized in that, when described outer spool (20) is positioned at neutral position, described inner spool (10) can move to the second place from neutral position under the effect of pilot pressure, described first port (P) is communicated with the 3rd port (A1) fluid, described second port (T) is communicated with described 4th port (B1) fluid, and the path leading to described five-port (A2) and the 6th port (B2) is blocked.
8. hydrovalve according to claim 4, it is characterized in that, described outer spool (20) can move to its primary importance from neutral position under the effect of pilot pressure, described inner spool (10) can move to its primary importance from neutral position under the effect of pilot pressure simultaneously, described first port (P) is communicated with the 6th port (B2) fluid, described second port (T) is communicated with five-port (A2) fluid, and the path leading to described 3rd port (A1) and the 4th port (B1) is blocked.
9. hydrovalve according to claim 4, it is characterized in that, described outer spool (20) can move to its second place from neutral position under the effect of pilot pressure, described inner spool (10) can move to its second place from neutral position under the effect of pilot pressure simultaneously, described first port (P) is communicated with five-port (A2) fluid, described second port (T) is communicated with the 6th port (B2) fluid, and the path leading to described 3rd port (A1) and the 4th port (B1) is blocked.
10. the hydrovalve according to any one of claim 4-9, it is characterized in that, described outer spool (20) comprises symmetrically arranged the first opening (21) in pairs of the wall running through outer spool (20) along the longitudinal direction, paired the second opening (22), the 3rd paired opening (23), the 4th paired opening (24) and the 5th paired opening (25), described inner spool (10) comprises the section that three diameters reduce along the longitudinal direction, form the first circular groove (11) thus, second circular groove (12) and the 3rd circular groove (13), described opening becomes to make with ring-groove configuration:
When described outer spool (20) is in neutral position and described inner spool (10) is in its primary importance, described first port (P) is communicated with described 4th port (B1) fluid via described 4th opening (24), the second circular groove (12) and the first opening (21), and described 3rd port (A1) is communicated with described second port (T) fluid via described second opening (22), the 3rd circular groove (13) and the 5th opening (25);
When described outer spool (20) is in neutral position and described inner spool (10) is in its second place, described first port (P) is communicated with described 3rd port (A1) fluid via described 4th opening (24), the second circular groove (12) and the second opening (22), and described 4th port (B1) is communicated with described second port (T) fluid via described first opening (21), the first circular groove (11) and the 3rd opening (23).
11. hydrovalves according to any one of claim 10, it is characterized in that, described 3rd opening (23), the 4th opening (24) and the 5th opening (25) are respectively formed in the 3rd depressed part (231), the 4th depressed part (241) and the 5th depressed part (251) on the outer surface of described outer spool (20), and described depressed part is configured so that:
When described outer spool (20) is in its primary importance and described inner spool (10) is in its primary importance, described first port (P) is communicated with the 6th port (B2) fluid with the second circular groove (12) via the 4th depressed part (241), the 4th opening (24), and described five-port (A2) is communicated with the second port (T) fluid with the 3rd circular groove (13) via the 5th depressed part (251), the 5th opening (25);
When described outer spool (20) is in its second place and described inner spool (10) is in its second place, described first port (P) is communicated with five-port (A2) fluid with the second circular groove (12) via the 4th depressed part (241), the 4th opening (24), and described 6th port (B2) is communicated with the second port (T) fluid with the first circular groove (11) via the 3rd depressed part (231), the 3rd opening (23).
12. 1 kinds of loaders, comprise the hydrovalve according to any one of claim 1 to 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410016430.2A CN104776075B (en) | 2014-01-14 | 2014-01-14 | Hydraulic valve and loading machine including the hydraulic valve |
| ZA2015/00266A ZA201500266B (en) | 2014-01-14 | 2015-01-14 | Hydraulic valve and loader comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410016430.2A CN104776075B (en) | 2014-01-14 | 2014-01-14 | Hydraulic valve and loading machine including the hydraulic valve |
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| Publication Number | Publication Date |
|---|---|
| CN104776075A true CN104776075A (en) | 2015-07-15 |
| CN104776075B CN104776075B (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410016430.2A Active CN104776075B (en) | 2014-01-14 | 2014-01-14 | Hydraulic valve and loading machine including the hydraulic valve |
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| Country | Link |
|---|---|
| CN (1) | CN104776075B (en) |
| ZA (1) | ZA201500266B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017023669A1 (en) * | 2015-08-03 | 2017-02-09 | Caterpillar Inc. | Valve assembly, hydraulic system and machine comprising the valve assembly |
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| CN103486291A (en) * | 2013-09-05 | 2014-01-01 | 武汉船用机械有限责任公司 | Manual control valve |
-
2014
- 2014-01-14 CN CN201410016430.2A patent/CN104776075B/en active Active
-
2015
- 2015-01-14 ZA ZA2015/00266A patent/ZA201500266B/en unknown
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| CN101896753A (en) * | 2008-06-27 | 2010-11-24 | 爱信艾达株式会社 | Solenoid valve |
| KR20100020690A (en) * | 2008-08-13 | 2010-02-23 | 김주일 | Hydraulic unit |
| CN102121487A (en) * | 2011-03-04 | 2011-07-13 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN103122995A (en) * | 2011-11-18 | 2013-05-29 | 腓特烈斯港齿轮工厂股份公司 | Hydraulic valve system for actuating at least one shifting element of a transmission |
| CN202360491U (en) * | 2011-11-25 | 2012-08-01 | 盛瑞传动股份有限公司 | Flow control valve for hydraulic valve plate of automatic transmission |
| CN203272864U (en) * | 2013-05-16 | 2013-11-06 | 邯郸市新天地矿业科技有限公司 | Reversing valve element |
| CN103486291A (en) * | 2013-09-05 | 2014-01-01 | 武汉船用机械有限责任公司 | Manual control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017023669A1 (en) * | 2015-08-03 | 2017-02-09 | Caterpillar Inc. | Valve assembly, hydraulic system and machine comprising the valve assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA201500266B (en) | 2016-09-28 |
| CN104776075B (en) | 2019-02-05 |
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