CN105987035B - Fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device - Google Patents
Fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device Download PDFInfo
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- CN105987035B CN105987035B CN201510090033.4A CN201510090033A CN105987035B CN 105987035 B CN105987035 B CN 105987035B CN 201510090033 A CN201510090033 A CN 201510090033A CN 105987035 B CN105987035 B CN 105987035B
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Abstract
The present invention relates to fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device.The fluid pressure valve device includes valve casing and the main valve plug and control valve that are arranged on inside valve casing,Main valve plug can move between the open position of the fluid communication between allowing to be defined in two in valve casing openings and the closed position for blocking the fluid communication,Control valve includes being fixed on the application valve body of valve casing and the control valve element that can be moved in the inner chamber of application valve body,In valve casing,Defined between main valve plug and application valve body only with the first hydraulic cavities for connecting of one of described two openings,The second hydraulic cavities connected with hydraulic fluid reservoir are further defined between valve casing and application valve body,Control valve element can move between the first and second positions under the control of the pilot pressure applied through forming the pilot control opening in valve casing,Prevent by its own respectively in the first and second valve position control cores and allow the first and second hydraulic cavities to be connected via the inner chamber of application valve body.
Description
Technical field
The present invention relates to a kind of fluid pressure valve device, more particularly in the hydraulic system of machine used in such as loading machine etc
Antisettle valve.The invention further relates to the hydraulic system including the fluid pressure valve device and machine.
Background technology
Hydraulic system would generally be used in various machines, especially Work machine such as loading machine, operator passes through manipulation
The action of hydraulic valve in hydraulic system controls the opening and closing of related hydraulic circuit, so that the equipment of machine
Perform desired various actions.Common equipment for example including swing arm and scraper bowl, hydraulic system respectively to swing arm and shovel
Associated hydraulic working cylinder (lift cylinder and scraper bowl cylinder) the supply hydraulic fluid of bucket, to realize that different actions, including shovel are dug, are dynamic
Discharging etc. that arm is lifted and declined, scraper bowl is tumbled.It is desirable to be maintained at swing arm or scraper bowl under some operating modes of loading machine
Specific opening position, antisettle valve is generally used in the hydraulic system of loading machine for this, even antisettle valve is when closed
Also the hydraulic oil in working cylinder can be prevented to flow back to fuel tank in the presence of load, this makes it possible to swing arm and scraper bowl are maintained at into special
Opening position is determined without settling.
Existing antisettle valve is usually contact, wherein a traveller can move under the control of pilot pressure in valve casing
To contact and promote a poppet valve core, to open the stream between lift cylinder or scraper bowl cylinder and hydraulic oil container.Repeatedly beating
During the course of work of the open and close stream, traveller repeatedly contacts poppet valve core, so as to cause to wear, reduces the tired longevity
Life, it is difficult to ensure reliable anti-settling function.
It is contemplated that being improved to existing above-mentioned contact antisettle valve, overcome it existing one or more scarce
Fall into.
The content of the invention
The first aspect of the present invention provides a kind of fluid pressure valve device, including valve casing and is arranged on inside the valve casing
Main valve plug and control valve, the main valve plug can beating in the fluid communication between two openings for allowing to be defined in the valve casing
Moved between open position and the closed position for blocking the fluid communication, the control valve includes the control valve for being fixed on the valve casing
The control valve element that body and being constructed to be permeable to moves in the inner chamber of the application valve body, in the valve casing, the main valve plug and described
Defined between application valve body only with the first hydraulic cavities for connecting of one of described two openings, in the valve casing and the control
The second hydraulic cavities connected with hydraulic fluid reservoir are further defined between valve body processed, wherein, the control valve element is constructed to be permeable to
Moved between the first and second positions under the control of the pilot pressure applied through forming the pilot control opening in the valve casing
It is dynamic to control the movement of the main valve plug, pass through its own prevention described first and the controlling valve element described in the first position
Two hydraulic cavities connect via the inner chamber of the application valve body, are controlling valve element to allow described first and the described in the second place
Two hydraulic cavities connect via the inner chamber of the application valve body.
The second aspect of the present invention provides a kind of hydraulic system for including above-mentioned fluid pressure valve device.
The third aspect of the present invention provides a kind of machine for including above-mentioned hydraulic system.
Brief description of the drawings
Fig. 1 is a kind of stereogram for the example machine applied according to the fluid pressure valve device of the present invention.
Fig. 2 shows sectional view of the fluid pressure valve device according to an embodiment of the invention when being closed.
Fig. 3 shows sectional view of fluid pressure valve device when in open mode shown in Fig. 2.
Embodiment
Fig. 1 shows a kind of exemplary machine 100.Machine 100 may be, for example, Work machine, such as wheel loader.Machine
Device 100 can also perform the operation related to specific industry (such as mining, building, agricultural, transport etc.) and in various operations
The machine of any other type of work, such as excavator etc. in environment (such as mining site, construction site, farm and road etc.).
Machine 100 may include mainframe 30, operating personnel's receiving space such as driver's cabin 35 and equipment.In a reality
Apply in example, equipment is for example including the scraper bowl 36 applied to loading machine and the swing arm being connected with the scraper bowl.Machine 100 may include
At least one operation with equipment connects and for controlling the hydraulic working cylinder 37 of the action of equipment, is, for example, and swing arm
The lift cylinder of connection and the scraper bowl cylinder being connected with scraper bowl 36.Have running gear 40 in the lower disposed of machine 100, for supporting and
Mobile machine 100.Running gear 40 is for example including wheel 41.
Fig. 2 and 3 schematically shows a kind of illustrative configuration of the fluid pressure valve device according to the present invention, hydraulic valve dress
Putting 10 can be arranged in the hydraulic system of machine 100.Fluid pressure valve device 10 includes valve casing 1 and the master being arranged on inside valve casing 1
Valve element 2 and control valve 3.The first opening 11 and the second opening 12 passed through for hydraulic fluid is defined in valve casing 1.The two are opened
Mouth can be respectively connecting to other devices, part or the position of hydraulic system.In the present embodiment, the first opening 11 may be connected to machine
The hydraulic working cylinder 37 of device 100, and the second opening 12 may be connected to the main hydraulic circuit of hydraulic system, with as just described hereinafter
Realize control of the fluid pressure valve device 10 to hydraulic working cylinder like that.
Main valve plug 2 can be in the open position (as shown in Figure 2) of the fluid communication between allowing the first and second openings and resistance
Moved between the closed position (as shown in Figure 3) of the disconnected fluid communication.In the normal state, main valve plug 2 by spring 21 towards closing
Position biases.
Control valve 3 being capable of the movement of control bound core 2 between open and closed positions.Control valve 3 includes fixing
In the control valve element 5 that the application valve body 4 and being constructed to be permeable to of valve casing 1 moves in the inner chamber 6 of application valve body 4.In the present embodiment,
The inner chamber 6 of application valve body 4 and control valve element 5 are in elongated.The both ends of inner chamber 6 can be blocked by plug 61 and 62 respectively.Control valve
Core 5 is in the form of a column and can moved along its axis.
Defined between valve casing 1, main valve plug 2 and application valve body 4 only with the first and second openings 11, one of 12 even
The first logical hydraulic cavities 7.In the present embodiment, the end for facing main valve plug 2 of application valve body 4 is relatively thin and can stretch into master
In respective cavities set by valve element 2, spring 21 is arranged between application valve body 4 and main valve plug 2, that is, is arranged on the first hydraulic cavities
In 7.Main valve plug 2 can relative to valve casing 1 internal chamber wall Fluid Sealing be slidably arranged in the inner chamber of valve casing 1, and the first hydraulic pressure
Chamber 7 can be only via the aperture 22 and first or the second open communication being arranged in main valve plug 2.In the present embodiment, the first hydraulic pressure
Chamber 7 connects via aperture 22 with being connected to the first opening 11 of hydraulic working cylinder 37, and aperture 22 leads to for as hereinafter described
The less throttle orifice of flow area.
The second hydraulic pressure connected with hydraulic fluid reservoir (not shown) is further defined between valve casing 1 and application valve body 4
Chamber 8.Second hydraulic cavities 8 are only capable of connecting with the first hydraulic cavities 7 via the inner chamber 6 of application valve body 4.
Defined in application valve body 4 the first path 13 for making the first hydraulic cavities 7 be connected with the inner chamber 6 of application valve body 4 and
The alternate path 14 for making the second hydraulic cavities 8 be connected with the inner chamber 6.First and second paths 13,14 each may comprise for example
Along the inner chamber 6 of application valve body 4 or one or more path radially extended of control valve element 5.
Control valve element 5 is constructed to be permeable to move between the first and second positions under the control of pilot pressure, described the
One valve position control core 5 is connected by its own first and second hydraulic cavities 7,8 of prevention via the inner chamber 6 of application valve body 4, in institute
Stating second place control valve element 5 allows the first and second hydraulic cavities 7,8 to be connected via the inner chamber 6.Do not loaded in control valve element 5
In the case of pilot pressure, control valve element is in the first position under the bias of spring 27, and is loaded with control valve element 5
Pilot pressure overcomes the active force of spring 27 and control valve element 5 is moved to the second place in the case of pilot pressure.Root
According to a kind of illustrative configuration, the control valve element 5 of column can have with the large-diameter portion 52 of the internal chamber wall sliding contact of application valve body 4 and
The cross section minor diameter part 51 smaller than large-diameter portion 52, resistance is blocked into the inner chamber 6 of application valve body 4 in the first position large-diameter portion 52
The only connection between the first and second hydraulic cavities 7,8, the second place minor diameter part 51 and application valve body 4 internal chamber wall it
Between formed with make the first and second hydraulic cavities 7,8 connect flow channel 15.It should be noted that from the first hydraulic cavities 7 through flow channel
The minimum flow area of 15 to the second hydraulic cavities 8 is preferably set to the flow area for being more than the aperture 22 formed in main valve plug 2.Control
The shape of cross section of the large-diameter portion 52 of the inner chamber 6 of valve body 4 processed and control valve element 5 is not particularly limited, can be circular, ellipse,
Even polygon, as long as large-diameter portion 52 can block inner chamber 6 and prevent hydraulic fluid by.Control the minor diameter part 51 of valve element 5
Cross section also can be in variously-shaped including circle, ellipse etc. including, as long as can its internal chamber wall with application valve body 4 it
Between formed make the first and second hydraulic cavities 7,8 connect flow channel.
In the present embodiment, for example, in the first position, the large-diameter portion 52 of control valve element 5 can directly block first and lead to
Road 13 (see Fig. 2)；In the second place, large-diameter portion 52 is removed and no longer blocks the first path 13, and flow channel 15 makes
First path 13 connects (see Fig. 3) with alternate path 14, it is clear that the length of minor diameter part 51 or flow channel 15 in this case
The first and second paths 13, the distance between 14 should be equal to or more than.It is it should be appreciated that unlimited in the first position large-diameter portion 52
In blocking the first path 13, but any other position that can also block alternate path 14 or be blocked between first and second path
Put, as long as it can prevent the first and second hydraulic cavities 7,8, the inner chamber 6 through application valve body 4 connects.
The pilot pressure that is controlled of movement for controlling valve element 5 can be formed pilot control opening 16 in valve casing 1 or
20 apply.In the present embodiment, control valve element 5 between the end 17 of main valve plug 2 and application valve body 4 formed with the 3rd
Hydraulic cavities 18, the 3rd hydraulic cavities 18 connect via the passage 19,26 formed in application valve body 4 and pilot control opening 16,20 respectively
Connect, and the spring 27 that power is biased to control valve element 5 may be provided in the 3rd hydraulic cavities 18.Pilot control opening 16 can be with hydraulic pressure
The main hydraulic circuit connection of system, and pilot control opening 20 can be connected with external hydraulic source.Preferably, using only pilot control opening
16 loading pilot pressures, and pilot control opening 20 can be blocked with plug 23, can so exempt the need to additional external hydraulic source
Ask.Certainly, removable plug 23 enables pilot control opening 20 at any time when necessary.
Control valve element 5 is respectively arranged with inner passage 24 and 25 at both ends, when control valve element 5 is under the control of pilot pressure
When moving between the first and second positions, the hydraulic fluid near the both ends of control valve element can when being pushed
Flowed back accordingly by inner passage 24 and 25, in order to avoid hinder movement of the control valve element 5 towards respective direction.
Industrial applicibility
The utilization hydraulic system of such as loading machine, excavator etc can be applied to according to the fluid pressure valve device of the present invention to hold
The machine of row task.In such machine, it usually needs arrange for will be by hydraulic working cylinder (such as lift cylinder and scraper bowl
Cylinder) equipment of driving is maintained at the antisettle valve of current location, with prevent the hydraulic fluid in corresponding working cylinder due to
The load that acts on machine and flowing back into hydraulic reservoirs settles equipment.
It is described below and is made according to hydraulic system of the above-mentioned fluid pressure valve device 10 of the present invention for example applied to loading machine 100
For the course of work of the antisettle valve of hydraulic working cylinder 37.
In the normal state, the main valve plug 2 of fluid pressure valve device 10 is in the closed position under the partial pressure of spring 21,
And control valve element 5 to be not loaded with pilot pressure and the first position is under the bias of spring 27, wherein large-diameter portion 52 blocks
First path 13 (see Fig. 2).Make when needing driving hydraulic working cylinder 37 on the equipment (scraper bowl 36 and swing arm) of loading machine 100
When rising, operator controls hydraulic system from hydraulic main circuit to the pumping hydraulic fluid of hydraulic working cylinder 37.From hydraulic main circuit
Pressurization hydraulic fluid via fluid pressure valve device 10 second opening 12 enter valve casings 1, overcome the active force of spring 21 to push open
Main valve plug 2 and reach first opening 11, and via first opening 11 inflow hydraulic working cylinders and promote its piston rod carry out swing arm
Lifting with scraper bowl acts.
After equipment lifting in place, stop the hydraulic fluid of pumping pressurization, then main valve plug 2 pushes back pass by spring 21
Closed position, thus the hydraulic fluid in hydraulic working cylinder is prevented to be flowed back through main valve plug 2 and effectively prevent equipment from settling.
During this, hydraulic fluid can enter the first hydraulic cavities 7 from the first opening 11 via the aperture 22 in main valve plug 2, but due to control
Obstruction of the valve element 5 at the first position and be maintained in the first hydraulic cavities 7, and also apply to main valve plug 2 and tend to make its pass
The hydraulic coupling closed.Now, spring force, hydraulic coupling and the valve seat supporting force for acting on the both sides of main valve plug 2 keep balance.
When equipment needs to decline, operator controls hydraulic system to inject hydraulic fluid to pilot control opening 16 and apply
Add pilot pressure.Hydraulic fluid enters the 3rd hydraulic cavities 18 through passage 19, and flow to the end of the end 17 of control valve core 5 and
The power for overcoming the active force of spring 27 to be moved towards main valve plug 2 is applied to control valve element 5.Thus, control valve element 5 is moved to Fig. 3
The shown second place, wherein large-diameter portion 52 are removed and no longer block the first path 13, and in minor diameter part 51 and application valve body 4
Internal chamber wall between the flow channel 15 that is formed the first path 13 is connected with alternate path 14.So, in the first hydraulic cavities 7
Fluid flows to the second hydraulic cavities 8 and and then flow back fluid pressure fluid storage through the first path 13, flow channel 15, alternate path 14
Device.Due to this flowing of hydraulic fluid, the left and right ends of throttle orifice 22 in main valve plug 2 produce pressure difference, and then in main valve plug 2
Both sides produce pressure difference.Then, main valve plug 2 pushes open position to by the hydraulic coupling acted in the first opening 11 again so that hydraulic pressure
Fluid in working cylinder can flow back to hydraulic fluid reservoir via first the 11, second opening 12 of opening and main hydraulic circuit, so as to
Realize the decline of equipment.
It is only logical according to the fluid pressure valve device 10 of the present invention compared with the contact antisettle valve of generally use in the prior art
Cross the movement of one control valve element 5 of control just can with its own come open and close hydraulic working cylinder and hydraulic fluid reservoir it
Between stream, reduce such a part of traveller, structure is simpler, it is easier to fabricate, save cost, and due to
Control valve element 5 mechanical collision will not occur with other parts, therefore reduce its mechanical wear, substantially increase the tired of antisettle valve
Labor life-span and performance.
In the above-described embodiments, the anti-settling being used as according to the fluid pressure valve device 10 of the present invention in the hydraulic system of loading machine
Valve.However, the invention is not restricted to this, fluid pressure valve device 10 can also be applied to times for controlling its main valve plug to be opened and closed by pilot pressure
What its hydraulic system.
The fluid pressure valve device of the present invention is described by specific embodiment above.For those skilled in the art
Speech to foregoing disclosed embodiment it is readily apparent that without departing from the scope or spirit of the invention, can make
Various modifications and variations.This specification and its disclosed example should be considered to be only exemplary, of the invention true scope by
Appended claims and its equivalent limit.
Claims (10)
1. a kind of fluid pressure valve device (10), including valve casing (1) and the main valve plug (2) and control valve that are arranged on inside the valve casing
(3), the main valve plug (2) can be in the fluid communication between two openings (11,12) for allowing to be defined in the valve casing (1)
Moved between open position and the closed position for blocking the fluid communication, the control valve (3) includes being fixed on the valve casing (1)
Application valve body (4) and be constructed to be permeable to the control valve element (5) moved in the inner chamber of the application valve body (6), in the valve casing
(1), define between the main valve plug (2) and the application valve body (4) and only connected with one of described two openings (11)
The first hydraulic cavities (7), be further defined between the valve casing (1) and the application valve body (4) and hydraulic fluid reservoir connect
Logical the second hydraulic cavities (8), wherein, the control valve element (5) is constructed to be permeable to control in the guide through being formed in the valve casing (1)
Moved between the first and second positions under the control for the pilot pressure that donsole (16,20) applies to control the main valve plug (2)
Movement, prevent described first and second hydraulic cavities (7,8) from passing through controlling valve element (5) to pass through its own described in the first position
Connected by the inner chamber (6) of the application valve body, controlling valve element (5) to allow first and second liquid described in the second place
Chamber (7,8) is pressed to be connected via the inner chamber (6) of the application valve body.
2. fluid pressure valve device (10) according to claim 1, it is characterised in that the control valve element (5) is in the form of a column, and has
There is the minor diameter part small with large-diameter portion described in the large-diameter portion of the internal chamber wall sliding contact of the application valve body (4) (52) and cross section ratio
(51), in large-diameter portion described in the first position by the inner chambers (6) of the application valve body (4) obstruction into preventing described first and the
Connection between two hydraulic cavities (7,8), in the second place in the inner chamber of the minor diameter part (51) and the application valve body (4)
Formed with the flow channel (15) for making the first and second hydraulic cavities (7,8) connection between wall.
3. fluid pressure valve device (10) according to claim 2, it is characterised in that defined in the application valve body (4)
Make the first path (13) and make second hydraulic pressure that first hydraulic cavities (7) connect with the inner chamber (6) of the application valve body
The alternate path (14) that chamber (8) connects with the inner chamber (6) of the application valve body, valve element (5) is being controlled described in the first position
Large-diameter portion (52) obstruction described first or alternate path, in the first and second paths described in the second place through the flowing
Passage (15) connects.
4. fluid pressure valve device (10) according to any one of claim 1 to 3, it is characterised in that in the control valve element
(5) the control valve element is in the first position under the bias of acting force of the spring in the case of not loading pilot pressure,
Pilot pressure overcomes the acting force of the spring and makes the control valve in the case that the control valve element (5) is loaded with pilot pressure
Core is moved to the second place.
5. fluid pressure valve device (10) according to any one of claim 1 to 3, it is characterised in that first hydraulic cavities
(7) the configured aperture (22) in the main valve plug (2) connects with the one (11) in described two openings (11,12)
It is logical.
6. fluid pressure valve device (10) according to any one of claim 1 to 3, it is characterised in that main valve plug (2) quilt
The spring (21) being arranged in first hydraulic cavities (7) biases towards the closed position.
7. a kind of hydraulic system, it includes fluid pressure valve device according to any one of claim 1 to 6.
8. a kind of machine (100), it includes hydraulic system according to claim 7.
9. machine according to claim 8, it is characterised in that the machine is loading machine, the fluid pressure valve device (10)
Described two openings (11,12) in valve casing (1) are respectively connecting to hydraulic working cylinder (37) and the main hydraulic pressure of the hydraulic system
Loop and the fluid pressure valve device is used as antisettle valve.
10. machine according to claim 9, it is characterised in that the pilot control opening (16) and the hydraulic system
Main hydraulic circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090033.4A CN105987035B (en) | 2015-02-27 | 2015-02-27 | Fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090033.4A CN105987035B (en) | 2015-02-27 | 2015-02-27 | Fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105987035A CN105987035A (en) | 2016-10-05 |
| CN105987035B true CN105987035B (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510090033.4A Active CN105987035B (en) | 2015-02-27 | 2015-02-27 | Fluid pressure valve device and hydraulic system and machine including the fluid pressure valve device |
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| CN (1) | CN105987035B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11066127B2 (en) | 2017-05-31 | 2021-07-20 | Honda Motor Co., Ltd. | Hydraulic valve unit, saddle-type vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411808A1 (en) * | 1989-07-31 | 1991-02-06 | Shin Caterpillar Mitsubishi Ltd. | Logic valve |
| CN101331324A (en) * | 2005-12-14 | 2008-12-24 | 萱场工业株式会社 | Actuator control device |
| EP2345815B1 (en) * | 2010-01-14 | 2012-10-24 | Bosch Rexroth Oil Control S.p.A. | A hydraulic valve for supporting and controlling descent of a load |
| EP2631517A1 (en) * | 2012-02-22 | 2013-08-28 | Atlantic Fluid Tech S.r.l. | Load holding valve |
| CN103775402A (en) * | 2012-10-17 | 2014-05-07 | 罗伯特·博世有限公司 | Hydraulic valve arrangement and hydraulic machine arrangement having same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6848475B2 (en) * | 2002-11-20 | 2005-02-01 | Caterpillar Inc. | Electro-hydraulic valve and system |
-
2015
- 2015-02-27 CN CN201510090033.4A patent/CN105987035B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411808A1 (en) * | 1989-07-31 | 1991-02-06 | Shin Caterpillar Mitsubishi Ltd. | Logic valve |
| CN101331324A (en) * | 2005-12-14 | 2008-12-24 | 萱场工业株式会社 | Actuator control device |
| EP2345815B1 (en) * | 2010-01-14 | 2012-10-24 | Bosch Rexroth Oil Control S.p.A. | A hydraulic valve for supporting and controlling descent of a load |
| EP2631517A1 (en) * | 2012-02-22 | 2013-08-28 | Atlantic Fluid Tech S.r.l. | Load holding valve |
| CN103775402A (en) * | 2012-10-17 | 2014-05-07 | 罗伯特·博世有限公司 | Hydraulic valve arrangement and hydraulic machine arrangement having same |
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| Publication number | Publication date |
|---|---|
| CN105987035A (en) | 2016-10-05 |
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