CN108799235A - A kind of excavator swing arm holding valve - Google Patents
A kind of excavator swing arm holding valve Download PDFInfo
- Publication number
- CN108799235A CN108799235A CN201810744363.4A CN201810744363A CN108799235A CN 108799235 A CN108799235 A CN 108799235A CN 201810744363 A CN201810744363 A CN 201810744363A CN 108799235 A CN108799235 A CN 108799235A
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- China
- Prior art keywords
- valve
- section
- spring
- hole
- hydraulic fluid
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Classifications
-
- 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
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
Abstract
Excavator swing arm according to the ... of the embodiment of the present invention keeps valve, including：Valve body, valve pocket, main valve plug, the first spring, pilot valve component.Excavator swing arm according to the ... of the embodiment of the present invention keeps valve swing arm can be made to be held in place when the swing arm control stick of excavator returns to middle position, can reliably absorb impact overflow.
Description
Technical field
The present invention relates to hydraulic control component technical fields, keep valve more particularly to a kind of excavator swing arm, are mounted on
Between the boom cylinder cylinder bottom and boom control valves of hydraulic crawler excavator, it is mainly used for controlling swing arm raising, holding and decline
Effect, is applicable to the excavator of various tonnages.
Background technology
Conventional hydraulic crawler excavator, movable arm hydraulic cylinder are directly connected with boom control valves, are controlled by boom control valves
The up and down and holding of brake arm.After scraper bowl is lifted off ground by hydraulic crawler excavator, may control for various reasons swing arm or
The reversal valve of dipper hydraulic cylinder is returning briefly to middle position, and engine is in idling mode again at this time, at this moment if the valve of reversal valve
Gap between core and valve body is excessive, there is leakage, even if can be automatic under Gravitative Loads if hydraulic cylinder non-internal leakage equipment
Decline.When the built-in full with substance of scraper bowl or when slinging weight with the suspension hook on scraper bowl, equipment declines automatically often leads to thing
Therefore.Meanwhile when oil pipe burst occur, swing arm will appear unexpected decline, and there are security risks.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.
It, can be with for this purpose, an object of the present invention is to provide a kind of when the swing arm control stick of excavator returns to middle position
Swing arm is set to be held in place, the excavator swing arm that can reliably absorb impact overflow keeps valve.
A kind of excavator swing arm according to the ... of the embodiment of the present invention keeps valve, including：
Valve body, it includes installing hole section and positioned at institute that the valve body, which has the first blind hole of opening upwards, first blind hole,
The valve opening section below mounting hole is stated, the aperture of the installation hole section is more than the aperture of the valve opening section, has position on the valve body
In the bottom of the valve body and be connected to the valve opening section the first hydraulic fluid port, on the side wall of the valve body and with the valve opening
The second hydraulic fluid port of Duan Liantong installs the third hydraulic fluid port and be located at institute that hole section is connected on the side wall of the valve body and with described
The 4th hydraulic fluid port stated on the side wall of valve body and be connected to the installation hole section；
Valve pocket, valve pocket cooperation in the installation hole section, on the valve pocket with Open Side Down and with the valve opening
The second coaxial blind hole of section；
Main valve plug, the main valve plug include the inserting section that can coordinate up or down in second blind hole, are located at institute
The first glissile segment in the valve opening section is stated below inserting section and can be coordinated up or down, and is slided positioned at described first
The diameter of the undergauge section for opening and closing the first hydraulic fluid port A below section, the inserting section is more than the undergauge section
Diameter has the spring blind hole for the upper surface for being opened on the inserting section on the main valve plug, is located at below the spring blind hole
Connection blind hole and be opened on the side wall of the undergauge section for being connected to second hydraulic fluid port and the connection blind hole
Damping hole defines the first control chamber, the valve pocket and the main valve plug between the valve body, the valve pocket and the main valve plug
Between define the second control chamber；
First spring, first spring are located between second blind hole and the spring blind hole, first spring
Upper end against the lower end of the valve pocket and first spring against the main valve plug, first spring is for often pushing away downwards
The main valve plug is moved so that the undergauge section often closes first hydraulic fluid port；
Pilot valve component, the pilot valve component are located on the valve pocket, are had on the valve pocket and are opened on the upper of valve pocket
The third blind hole of end face, the third blind hole include major diameter section and the path section below major diameter section, the pilot valve component
Including piston, valve seat, steel ball, second spring, valve deck, the piston includes that can coordinate up or down the of the path section
Two glissile segments, the supporting section below second glissile segment and the ejection section positioned at second glissile segment, described
The diameter of two glissile segments is more than the diameter of the supporting section and the diameter of second glissile segment is more than the diameter for ejecting section,
The path section is divided into the first first guide cavity below second glissile segment and positioned at described the by second glissile segment
The second first guide cavity above two glissile segments, the valve seat cooperation has in the major diameter section, on the valve seat supplies the ejection
Section by through-hole, it is described ejection section diameter be less than the through-hole aperture, it is described ejection section lower end have the conical surface, work as institute
When stating the bottom surface of the lower end of supporting section against the path section, the conical surface opens the lower end of the through-hole, when the supporting section
Lower end be moved upwardly by and far from the path section bottom surface when, the conical surface closes the lower end of the through-hole and the ejection section
Upper end eject the upper end of the through-hole upwards, the valve deck cooperation in the major diameter section and positioned at the upper surface of described valve seat,
On the valve deck have Open Side Down and the spring cavity coaxial with the through-hole, the steel ball is located in the spring cavity, described
Second spring is located in the spring cavity, and the lower end of upper end against the valve deck and the second spring of the second spring is supported
By the steel ball, the second spring often pushes downwards the steel ball to close the upper end of the through-hole；
Wherein, first control chamber is connected to the through-hole of the valve seat, second control chamber and second guide
Chamber is connected to, and the described first first guide cavity is connected to the third hydraulic fluid port, and the spring cavity is connected to the 4th hydraulic fluid port.
Advantageously, it further includes spill valve that the excavator swing arm, which keeps valve, and the spill valve is located at described
On valve pocket, on the valve pocket have be opened on valve pocket upper surface the 4th blind hole, the 4th blind hole include construction section and
Linkage section below the construction section, the aperture of the construction section are more than the aperture of the linkage section, the overflow valve group
Part includes valve plug, third spring, end cap and plug, and the valve plug is located in the linkage section, and the end cap cooperation is in the peace
In the upper end for filling section, there is the end cap central through hole, the plug to coordinate in the central through hole, the third spring
Upper end is against the lower end of the plug and the lower end of the third spring is against the upper end of the valve plug, and the third spring is downward
The valve plug is often pushed to close the upper end of the linkage section, wherein the construction section is connected to the third hydraulic fluid port, the company
Section is connect to be connected to second control chamber.
Advantageously, the first flow between first control chamber and the through-hole of the valve seat by being located on the valve body
Connection.
Advantageously, the second flow channel between second control chamber and the second first guide cavity by being located on the valve body
Connection.
Advantageously, connected by the third flow channel being located on the valve body between the described first first guide cavity and the third hydraulic fluid port
It is logical.
Advantageously, it is connected to by the 4th runner being located on the valve body between the spring cavity and the 4th hydraulic fluid port.
Advantageously, it is connected to by the 5th runner being located on the valve body between the construction section and the third hydraulic fluid port.
Advantageously, connected by the 6th runner being located on the valve body between the linkage section and second control chamber
It is logical.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the schematic diagram that excavator swing arm according to an embodiment of the invention keeps valve；
Fig. 2 is the sectional view of the line C-C in Fig. 1；
Fig. 3 is the sectional view of the line D-D in Fig. 1.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings valve is kept excavator swing arm according to the ... of the embodiment of the present invention is described in detail.
As shown in Figure 1 to Figure 3, excavator swing arm according to the ... of the embodiment of the present invention keeps valve, including：Valve body 1, valve pocket 4 are main
Spool 2, the first spring 3, pilot valve component 5.
Specifically, it includes installing hole section and positioned at institute that valve body 1, which has the first blind hole of opening upwards, first blind hole,
The valve opening section below mounting hole is stated, the aperture of the installation hole section is more than the aperture of the valve opening section.Have on valve body 1 and is located at valve
The bottom of body 1 and be connected to the valve opening section the first hydraulic fluid port A, be connected on the side wall of valve body 1 and with the valve opening section
Second hydraulic fluid port B, on the side wall of valve body 1 and with the third hydraulic fluid port X that is connected to of installation hole section and positioned at the side wall of valve body 1
The 4th hydraulic fluid port L that is upper and being connected to the installation hole section.
It is understood that in use, the first hydraulic fluid port A is connected with the actuator port of boom control valves, the second hydraulic fluid port B with
The plunger shaft of movable arm cylinder of excavator is connected, and third hydraulic fluid port X is exported with pilot handle to be connected, the 4th hydraulic fluid port L directly with fuel tank phase
Even.
Valve pocket 4 coordinates in the installation hole section, with Open Side Down and coaxial with the valve opening section second on valve pocket 4
Blind hole.
Main valve plug 2 includes the inserting section that can coordinate up or down in second blind hole, is located under the inserting section
Face and the first glissile segment in the valve opening section, and the use below first glissile segment can be coordinated up or down
In the undergauge section for opening and closing the first hydraulic fluid port A, the diameter of the inserting section is more than the diameter of the undergauge section, it is possible thereby to make
The upward forced area of first glissile segment is more than downward forced area.Have on main valve plug 2 and is opened on the inserting section
Upper surface spring blind hole, the connection blind hole below the spring blind hole and the side wall for being opened on the undergauge section
On for connection the second hydraulic fluid port B and it is described connection blind hole damping hole 2a.As shown in Figure 1, valve body 1, valve pocket 4 and main valve plug 2
Between define the first control chamber 1a, the second control chamber 1b is defined between valve pocket 4 and main valve plug 2.
First spring 3 is located between second blind hole and the spring blind hole, and the upper end of the first spring 3 is against valve pocket 4
And first spring 3 lower end against main valve plug 2, the first spring 3 for often pushing main valve plug 2 so that the undergauge Duan Changguan downwards
Close the first hydraulic fluid port A.
Pilot valve component 5 is located on valve pocket 4.There is the third blind hole for the upper surface for being opened on valve pocket 4 on valve pocket 4, it is described
Third blind hole includes major diameter section and the path section below major diameter section.Pilot valve component 5 includes piston 51, valve seat 52, steel ball
53, second spring 54, valve deck 55.Piston 51 include can coordinate up or down the path section the second glissile segment, be located at
Supporting section below second glissile segment and the ejection section positioned at second glissile segment, the diameter of second glissile segment
More than the diameter that the diameter of the diameter of the supporting section and second glissile segment is more than the ejection section, second glissile segment
The path section is divided into the first elder generation guide cavity 5a below second glissile segment and above second glissile segment
The second first guide cavity.Valve seat 52 coordinate in the major diameter section, on valve seat 52 have for it is described ejection section by through-hole, it is described
The diameter for ejecting section is less than the aperture of the through-hole, and the lower end of the ejection section has the conical surface 511, when the lower end of the supporting section
Against the path section bottom surface when, the conical surface 511 opens the lower end of the through-hole, when the lower end of the supporting section is moved upwardly by simultaneously
When the bottom surface of the separate path section, the conical surface 511 closes the lower end of the through-hole and the upper end of the ejection section and ejects institute upwards
State the upper end of through-hole.The cooperation of valve deck 55 is in the major diameter section and positioned at the upper surface of valve seat 52, with Open Side Down on valve deck 55
And the coaxial spring cavity with the through-hole.Steel ball 53 is located in the spring cavity.Second spring 54 is located in the spring cavity, the
Against the lower end of valve deck 55 and second spring 54 against steel ball 53, second spring 54 often pushes downwards steel ball for the upper end of two springs 54
53 to close the upper end of the through-hole.
Wherein, the first control chamber 1a is connected to the through-hole of valve seat 52, and the second control chamber 1b is connected to the described second first guide cavity,
First elder generation guide cavity 5a is connected to third hydraulic fluid port X, and the spring cavity is connected to the 4th hydraulic fluid port L.
For example, being connected to by the first flow 41 being located on valve body 4 between the first control chamber 1a and the through-hole of valve seat 52.The
It is connected to by the second flow channel 42 being located on valve body 4 between two control chamber 1b and the described second first guide cavity.First elder generation guide cavity 5a with
It is connected to by the third flow channel 43 being located on valve body 4 between third hydraulic fluid port X.By setting between the spring cavity and the 4th hydraulic fluid port L
The 4th runner 44 connection on valve body 4.
The first operating mode, when third hydraulic fluid port X is in passive state, under the active force of second spring 54, pilot control
Valve module 5 is in by the state of the first control chamber 1a and the second control chamber 1b connections, (i.e. the first control chamber 1a passes through first flow
41, the through-hole of valve seat 52, the second first guide cavity and second flow channel 42 are connected to the second control chamber 1b), at this point, fluid is by first
If hydraulic fluid port A is flowed into, fluid acts on main valve plug 2, and the active force of the first spring 3 is overcome to move upwards opening valve port, and first
Hydraulic fluid port A and the second hydraulic fluid port B are communicated.Fluid flows into the second hydraulic fluid port B by the first hydraulic fluid port A and can freely be connected, and is because of the first control
Chamber 1a and the second control chamber 1b is in connected state, and main valve plug 2 is opened under the action of the first hydraulic fluid port A and the second hydraulic fluid port B pressure differences
's.
Second of operating mode, when third hydraulic fluid port X is in passive state, under the active force of second spring 54, pilot control
Valve module 5 is in by the state of the first control chamber 1a and the second control chamber 1b connections, at this point, what fluid was flowed by the second hydraulic fluid port B
Words, the close port under the active force for taking the first spring 3 of main valve plug 2, the first hydraulic fluid port A and the second hydraulic fluid port B phases are ended.And because the
One control chamber 1a and the second control chamber 1b is in connected state, the pressure of the second hydraulic fluid port B act on the resultant force on main valve plug 2 to
Under, so main valve plug 2 is to be closed (the i.e. closing of main valve plug 2 under the action of the first spring 3 and the second hydraulic fluid port B pressure
First hydraulic fluid port A).And at this time between the second hydraulic fluid port B and the first hydraulic fluid port A, pilot control valve module 5 all be cone sealing or sealing ring it is close
Envelope, therefore the second hydraulic fluid port B can ensure No leakage, and then ensure that excavator swing arm will not generate sinking because of leakage.
The third operating mode, when third hydraulic fluid port X is in band pressure condition, and the pressure oil of third hydraulic fluid port X enters first first
Guide cavity 5a is applied on piston 51, and piston 51 is pushed to move upwards the active force for overcoming second spring 54, and open-top steel ball 53 is by the
One control chamber 1a is connected to L mouthfuls, while the conical surface 511 of piston 51 blocks the through-hole on valve seat 52 to block the second control chamber 1b
With being connected to for the first control chamber 1a, the stress on such main valve plug 2 is changed, the second hydraulic fluid port B act on main valve plug 2 to
On active force be more than downward active force (the upward forced area of the first glissile segment is more than downward forced area), main valve plug
2 move upwards the first hydraulic fluid port A of opening, and fluid flows into the first hydraulic fluid port A by the second hydraulic fluid port B, and excavator swing arm can be in swing arm control
Lowering action is carried out under the operation of valve processed.
A specific example according to the present invention, it further includes spill valve 6, overflow that the excavator swing arm, which keeps valve,
Valve module 6 is located on valve pocket 4.The 4th blind hole with the upper surface for being opened on valve pocket 4 on valve pocket 4, the 4th blind hole include
Construction section and the linkage section below the construction section, the aperture of the construction section are more than the aperture of the linkage section.It overflows
It includes valve plug 61, third spring 62, end cap 63 and plug 64 to flow valve module 6.Valve plug 61 is located in the linkage section, and end cap 63 is matched
It closes in the upper end of the construction section, end cap 63 has central through hole.Plug 64 coordinates in the central through hole.Third spring
62 upper end is against the lower end of plug 64 and the lower end of third spring 62 is against the upper end of valve plug 61, and third spring 62 often pushes away downwards
Dynamic valve plug 61 is to close the upper end of the linkage section.Wherein, the construction section is connected to third hydraulic fluid port X, the linkage section and
Two control chamber 1b connections.
For example, being connected to by the 5th runner 45 being located on valve body 4 between the construction section and third hydraulic fluid port X.The company
It connects and is connected to by the 6th runner 46 being located on valve body 4 between section and the second control chamber 1b.
The effect of spill valve 6 is, when being kept for the stage in swing arm (second above-mentioned of operating mode), if because of outside
When active force or oil temperature raising cause boom cylinder piston cavity pressure to be more than safe pressure, spill valve 6 is opened, the second control
The fluid of chamber 1b overflows to third hydraulic fluid port X, because of the effect of damping hole 2a, the pressure of the second hydraulic fluid port B is made to be more than the second control chamber 1b
Pressure, and because the first control chamber 1a and the second control chamber 1b at this time are connected, the pressure of the second hydraulic fluid port B is also greater than the first control
The pressure of chamber 1a, main valve plug 2 moves upwards under the action of pressure difference opens the first hydraulic fluid port A, and the fluid of the second hydraulic fluid port B is overflowed to
A mouthfuls, play the role of safeguard protection.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example is changed, changes, replacing and modification, each falls within protection scope of the present invention.
Claims (8)
1. a kind of excavator swing arm keeps valve, which is characterized in that including：
Valve body, it includes installing hole section and positioned at the peace that the valve body, which has the first blind hole of opening upwards, first blind hole,
The valve opening section below hole is filled, the aperture of the installation hole section is more than the aperture of the valve opening section, has on the valve body and be located at institute
State the bottom of valve body and be connected to the valve opening section the first hydraulic fluid port, on the side wall of the valve body and with the valve opening Duan Lian
Logical the second hydraulic fluid port, third hydraulic fluid port be connected on the side wall of the valve body and with the installation hole section and positioned at the valve
The 4th hydraulic fluid port being connected on the side wall of body and with the installation hole section；
Valve pocket, the valve pocket cooperation is in the installation hole section, with Open Side Down and same with the valve opening section on the valve pocket
Second blind hole of axis；
Main valve plug, the main valve plug include the inserting section that can coordinate up or down in second blind hole, are located at described insert
The first glissile segment in the valve opening section is connect below section and can coordinate up or down, and under first glissile segment
The undergauge section for opening and closing the first hydraulic fluid port A in face, the diameter of the inserting section are more than the diameter of the undergauge section,
Spring blind hole with the upper surface for being opened on the inserting section on the main valve plug, the connection below the spring blind hole
It blind hole and is opened on the side wall of the undergauge section for being connected to the damping of second hydraulic fluid port and the connection blind hole
Hole defines the first control chamber, between the valve pocket and the main valve plug between the valve body, the valve pocket and the main valve plug
Define the second control chamber；
First spring, first spring are located between second blind hole and the spring blind hole, first spring it is upper
End is against the lower end of the valve pocket and first spring against the main valve plug, and first spring is for often pushing downwards institute
Main valve plug is stated so that the undergauge section often closes first hydraulic fluid port；
Pilot valve component, the pilot valve component are located on the valve pocket, have the upper surface for being opened on valve pocket on the valve pocket
Third blind hole, the third blind hole includes major diameter section and the path section below major diameter section, and the pilot valve component includes
Piston, valve seat, steel ball, second spring, valve deck, the piston include that can coordinate to slide the second of the path section up or down
Dynamic section, the supporting section below second glissile segment and the ejection section positioned at second glissile segment, described second slides
The diameter for the diameter and second glissile segment that the diameter of dynamic section is more than the supporting section is more than the diameter of the ejection section, described
The path section is divided into the first first guide cavity below second glissile segment and is located at described second by the second glissile segment to be slided
The second first guide cavity above dynamic section, the valve seat cooperation have logical for the ejection section in the major diameter section, on the valve seat
The diameter of the through-hole crossed, the ejection section is less than the aperture of the through-hole, and the lower end of the ejection section has the conical surface, when the branch
Support section lower end against the path section bottom surface when, the conical surface opens the lower end of the through-hole, when under the supporting section
End be moved upwardly by and far from the path section bottom surface when, the conical surface close the lower end of the through-hole and it is described ejection section it is upper
End ejects the upper end of the through-hole upwards, and the valve deck cooperation is described in the major diameter section and positioned at the upper surface of described valve seat
On valve deck have Open Side Down and the spring cavity coaxial with the through-hole, the steel ball is located in the spring cavity, described second
Spring is located in the spring cavity, and the upper end of the second spring is against the lower end of the valve deck and the second spring against institute
Steel ball is stated, the second spring often pushes downwards the steel ball to close the upper end of the through-hole；
Wherein, first control chamber is connected to the through-hole of the valve seat, and second control chamber connects with the described second first guide cavity
Logical, the described first first guide cavity is connected to the third hydraulic fluid port, and the spring cavity is connected to the 4th hydraulic fluid port.
2. excavator swing arm according to claim 1 keeps valve, which is characterized in that further include spill valve, it is described to overflow
Stream valve module is located on the valve pocket, has the 4th blind hole of the upper surface for being opened on valve pocket on the valve pocket, the described 4th is blind
Hole includes construction section and the linkage section below the construction section, and the aperture of the construction section is more than the hole of the linkage section
Diameter, the spill valve include valve plug, third spring, end cap and plug, and the valve plug is located in the linkage section, the end
In the upper end of the construction section, there is the end cap central through hole, the plug to coordinate in the central through hole for lid cooperation,
The upper end of the third spring is against the lower end of the plug and the lower end of the third spring against the upper end of the valve plug, institute
Stating third spring often pushes downwards the valve plug to close the upper end of the linkage section, wherein the construction section and the third
Hydraulic fluid port is connected to, and the linkage section is connected to second control chamber.
3. excavator swing arm according to claim 2 keeps valve, which is characterized in that first control chamber and the valve seat
Through-hole between be connected to by the first flow that is located on the valve body.
4. excavator swing arm according to claim 2 keeps valve, which is characterized in that second control chamber and described second
It is connected to by the second flow channel being located on the valve body between first guide cavity.
5. excavator swing arm according to claim 2 keeps valve, which is characterized in that the described first first guide cavity and the third
It is connected to by the third flow channel being located on the valve body between hydraulic fluid port.
6. excavator swing arm according to claim 2 keeps valve, which is characterized in that the spring cavity and the 4th hydraulic fluid port
Between be connected to by the 4th runner that is located on the valve body.
7. excavator swing arm according to claim 2 keeps valve, which is characterized in that the construction section and the third hydraulic fluid port
Between be connected to by the 5th runner that is located on the valve body.
8. excavator swing arm according to claim 2 keeps valve, which is characterized in that the linkage section is controlled with described second
It is connected to by the 6th runner being located on the valve body between chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744363.4A CN108799235A (en) | 2018-07-09 | 2018-07-09 | A kind of excavator swing arm holding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744363.4A CN108799235A (en) | 2018-07-09 | 2018-07-09 | A kind of excavator swing arm holding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108799235A true CN108799235A (en) | 2018-11-13 |
Family
ID=64074879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810744363.4A Withdrawn CN108799235A (en) | 2018-07-09 | 2018-07-09 | A kind of excavator swing arm holding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108799235A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826838A (en) * | 2019-02-27 | 2019-05-31 | 江苏徐工工程机械研究院有限公司 | A kind of load holding valve |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
-
2018
- 2018-07-09 CN CN201810744363.4A patent/CN108799235A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826838A (en) * | 2019-02-27 | 2019-05-31 | 江苏徐工工程机械研究院有限公司 | A kind of load holding valve |
| CN109826838B (en) * | 2019-02-27 | 2023-09-05 | 江苏徐工工程机械研究院有限公司 | Load holding valve |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181113 |
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| WW01 | Invention patent application withdrawn after publication |