CN204163139U - A kind of swing arm revolution pilot valve and hydraulic crawler excavator - Google Patents
A kind of swing arm revolution pilot valve and hydraulic crawler excavator Download PDFInfo
- Publication number
- CN204163139U CN204163139U CN201420513232.2U CN201420513232U CN204163139U CN 204163139 U CN204163139 U CN 204163139U CN 201420513232 U CN201420513232 U CN 201420513232U CN 204163139 U CN204163139 U CN 204163139U
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- China
- Prior art keywords
- swing arm
- oil circuit
- revolution
- spool
- guide oil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a kind of swing arm revolution pilot valve; comprise valve body; swing arm revolution guide oil circuit is provided with in described valve body; also comprise pressure-gradient control valve; described pressure-gradient control valve to be arranged in described valve body and to be series in described swing arm revolution guide oil circuit; under swing arm promotes the effect of guide oil, throttling can be carried out to described swing arm revolution guide oil circuit, can ensure not shut down adjustment swing arm speed of gyration.The utility model also relates to a kind of hydraulic crawler excavator comprising this pilot valve, improves the efficiency that excavator swing arm performs an action.
Description
Technical field
The utility model relates to Hydraulic Field, especially a kind of swing arm revolution pilot valve and hydraulic crawler excavator.
Background technology
Hydraulic crawler excavator is primarily of motor, circuit apparatus for hydraulic, equipment, running gear, getting-on platform and electrical control composition.The swing arm of equipment, dipper and scraper bowl and rotary motor, running motor are driven by an oil pump feed, wherein any two or more hydraulic actuator works formation composite move simultaneously, in composite move, swing arm promotes and pivotal composite move is the working condition that a kind of frequency is very high, and its harmony has influence on the operating efficiency of excavator.Unload in native operation process at excavator, there will be gets on the bus is turned back to the position of dress navy barrow but swing arm does not rise to the height that can unload soil, and execution architecture action coordinates to obtain inharmonious direct reduction overall operation efficiency.
At present, following several mode is mainly adopted when coordinating swing arm and revolution composite move:
The first is that restriction enters the flow of rotary motor, reduces the speed of upper-part rotation, thus improves swing arm hoisting power, reaches the object that both coordinate when composite move by a fixed throttle port access revolution working connection.In the method for revolution working connection access fixed throttle port, although can reach the object that restriction enters rotary motor flow, because working connection flow is comparatively large, restriction can produce the larger pressure loss, and system effectiveness is lower.
The second reaches by the stroke of restriction revolution main valve plug the object that restriction enters rotary motor flow.Be illustrated in figure 1 the pressure-gradient control valve device adopting caging bolt structure, by regulating the position of caging bolt S, the stroke turning round main valve plug reduced, thus the flow entering rotary motor can be limited, thus reducing speed of gyration, reaching the object that both coordinate.Although the method adopting position-limit mechanism to limit revolution main valve plug range can reduce pivotal speed when composite move, and comparatively less in the loss of working connection choke pressure.But when swing arm does separately revolution action, its speed of gyration is also restricted, must shut down by complete machine when governing speed, then regulate caging bolt to realize, thus cannot the adjustment of rapid response speed, therefore the efficiency that regulates of swing arm speed of gyration is lower.
To be then the guide oil that releases rotary control valve core by part limit the commutating speed of rotary control valve spool to the mode of fuel tank for another, reach the object that swing arm is preferential, but need other design and installation new valve, add the complexity of structure, and because prior art is guide oil be communicated with fuel tank, lay down part guide oil to set up to delay pressure, the power that the part guide oil so laid down is taken away just have lost, and therefore the energy consumption of system increases; And the valve in prior art is be connected in parallel with the connected mode of revolution guide oil circuit, therefore in actual applications, be difficult to accurately hold to the control of commutating speed, when carrying out adjusted design throttle orifice size according to current swing arm to the difference of turning round precession time and required time, often because of the interference of response lag, effect is bad for design result.
Utility model content
The utility model provides a kind of swing arm to turn round pilot valve and comprises the hydraulic crawler excavator of this pilot valve; avoid and restriction is set in working connection and build-up of pressure loses; improve the quick switching of response speed and speed of gyration; and can ensure not shut down adjustment swing arm speed of gyration, improve the efficiency that excavator swing arm performs an action.
The utility model provides a kind of swing arm to turn round pilot valve, comprise valve body, swing arm revolution guide oil circuit is provided with in described valve body, also comprise pressure-gradient control valve, described pressure-gradient control valve to be arranged in described valve body and to be series in described swing arm revolution guide oil circuit, can carry out throttling under swing arm promotes the effect of guide oil to described swing arm revolution guide oil circuit.
Further, this pressure-gradient control valve comprises spool, valve core reset parts and spool limiting component, described valve body has installing hole, described spool limiting component, spool, valve core reset parts are arranged successively from outside to inside along the axial direction of described installing hole in described installing hole, and described spool can be against on described spool limiting component by described valve core reset parts in an initial condition; Described spool can move to from making described swing arm turn round the unimpeded primary importance of guide's oil circuit the second place making described swing arm turn round the throttling of guide's oil circuit under swing arm promotes the effect of guide oil.
Further, the entrance of described installing hole is positioned on the outer wall of described valve body, and connect swing arm lifting guide oil circuit, described spool limiting component has through hole, and described swing arm promotes guide oil can arrive one end contrary with described valve core reset parts on described spool by the through hole on the entrance of described installing hole and described spool limiting component.
Further, described spool has the restriction that can make the throttling of revolution guide oil circuit towards one end of the entrance of described installing hole, described spool has the through hole that revolution guide oil circuit can be made unimpeded towards one end of described valve core reset parts, when described primary importance, the through hole on described spool is arranged in described revolution guide oil circuit; When the second place, the restriction on described spool is arranged in described revolution guide oil circuit.
Further, described spool limiting component is for having externally threaded hexagonal socket nut, and the through hole on described spool limiting component is inner hexagonal hole; The inwall of the entry position of described installing hole has internal thread, the external screw thread of described hexagonal socket nut and described screw-internal thread fit.
Further, one end of this pilot valve is provided with cavity, and the other end is provided with revolution guide hydraulic fluid port, and described cavity is connected by described revolution guide oil circuit with described revolution guide hydraulic fluid port.
Further, described cavity accommodates back-moving spring and spring base, and described back-moving spring can prop up the main valve plug of swing arm rotary control valve in described cavity by described spring base.
The utility model it is also proposed a kind of hydraulic crawler excavator, comprises swing arm rotary control valve and swing arm lifting control valve, also comprises above-mentioned swing arm revolution pilot valve; Described swing arm rotary control valve comprises rotary control valve core, and described swing arm promotes control valve and comprises boom control valves core; The both sides of described rotary control valve core connect left revolution guide's oil circuit and right-hand rotation guide oil circuit respectively, and the both sides that described lifting controls spool connect swing arm decline guide's oil circuit and swing arm lifting guide oil circuit respectively; Described left revolution guide's oil circuit and right-hand rotation guide oil circuit all arrange described swing arm revolution pilot valve, described pressure-gradient control valve is series in described left revolution guide's oil circuit and right-hand rotation guide oil circuit, can carry out throttling under described swing arm promotes the effect of guide oil to described left revolution guide's oil circuit and right-hand rotation guide oil circuit.
The beneficial effects of the utility model are as follows:
Pilot valve of the present utility model is due to the guide oil throttling for revolution guide oil circuit, control the flow entering revolution guide oil pocket, the flow of the every guide's of entering oil pocket all does useful work for setting up pilot pressure, compared to traditional working connection throttle style, does not have unnecessary pressure consumption; Further, owing to turning round the slow of pilot pressure foundation, therefore spool commutation just slowly, so the opening turning round the spool of pilot valve at same time point is little, it is slower than not adding pressure-gradient control valve to turn round responsiveness, thus coordinates the preferential of swing arm lifting implementation swing arm lifting.When independent swing arm revolution action, in non-stop-machine situation, the size of the pivotal speed of swing arm can be regulated by the openings of sizes of adjustment rotary valve key, therefore, it is possible to realize the quick switching of swing arm speed of gyration height easily.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the pressure-gradient control valve device of existing employing caging bolt structure.
Fig. 2 is the sectional drawing of a specific embodiment of swing arm of the present utility model revolution pilot valve.
Fig. 3 shows swing arm of the present utility model revolution and promotes an embodiment of hydraulic control system.
Detailed description of the invention
Below by drawings and Examples, technical solutions of the utility model are described in further detail.
Fig. 2 shows a specific embodiment of swing arm of the present utility model revolution pilot valve.This swing arm revolution pilot valve comprises valve body, is provided with swing arm revolution guide oil circuit 11 in described valve body, by controlling the mistake oil mass of this swing arm revolution guide oil circuit 11 to realize the pivotal control of swing arm.Also comprise pressure-gradient control valve in pilot valve of the present utility model, described pressure-gradient control valve to be arranged in described valve body and to be series in described swing arm revolution guide oil circuit 11, can carry out throttling under swing arm promotes the effect of guide oil to described swing arm revolution guide oil circuit 11.When needs control, suppress described swing arm to turn round the mistake oil mass of guide's oil circuit 11 by this pressure-gradient control valve, thus reduce the speed of gyration of swing arm.
Particularly, this pressure-gradient control valve comprises spool 2, valve core reset parts 12 and spool limiting component 3, in addition, as shown in Figure 2, described valve body has installing hole, described spool limiting component 3, spool 13, valve core reset parts 12 are arranged successively from outside to inside along the axial direction of described installing hole in described installing hole, and described spool can be against on described spool limiting component 3 by described valve core reset parts 12 in an initial condition; Described spool 13 can move to from making described swing arm turn round the unimpeded primary importance of guide's oil circuit 11 second place making described swing arm turn round the throttling of guide's oil circuit 11 under swing arm promotes the effect of guide oil.Here valve core reset parts 12 can select the common components in this area, such as spring etc., the lower end of spring can be connected with bottom installing hole in addition, and upper end is connected with spool 13 lower end.Spool limiting component 3 can for having externally threaded hexagonal socket nut, and the through hole on spool limiting component 3 is inner hexagonal hole; The inwall of the entry position of installing hole has internal thread, the external screw thread of described hexagonal socket nut and described screw-internal thread fit, so that the position limiting described spool 13.
The entrance of described installing hole is positioned on the outer wall of described valve body, and connect swing arm lifting guide oil circuit, described spool limiting component 3 has through hole A, and described swing arm promotes guide oil can arrive one end contrary with described valve core reset parts 12 on described spool by the through hole on the entrance of described installing hole and described spool limiting component 3.Therefore, swing arm lifting guide oil can be passed through this through hole and presses to spool 13, makes spool 13 move to from making described swing arm turn round the unimpeded primary importance of guide's oil circuit 11 second place making described swing arm turn round the throttling of guide's oil circuit 11.
Described spool 13 has the restriction 2 that can make the throttling of revolution guide oil circuit towards one end of the entrance of described installing hole, described spool has the through hole B that revolution guide oil circuit can be made unimpeded towards one end of described valve core reset parts, when described primary importance, the through hole B on described spool is arranged in described revolution guide oil circuit; When the second place, the restriction 2 on described spool is arranged in described revolution guide oil circuit, namely when the second place, is realized the throttling of revolution guide oil circuit by restriction 2.
In addition, as shown in Figure 2, one end of this pilot valve is provided with cavity C, and guide's end cap 1 of the other end is provided with revolution guide hydraulic fluid port 14, and described cavity is connected by described revolution guide oil circuit with described revolution guide hydraulic fluid port 14.Be provided with back-moving spring 5 and spring base 6 in the cavity C of this pilot valve, described back-moving spring 5 can prop up the main valve plug 9 of swing arm rotary control valve in described cavity by described spring base 6.One end being provided with described cavity C of described pilot valve is sealingly connected on the valve body 8 of the swing arm revolving valve of this hydraulic crawler excavator by such as O-ring seals 7.
The utility model it is also proposed one and comprises the utility model swing arm revolution pilot valve hydraulic crawler excavator.Show the swing arm revolution of this hydraulic crawler excavator as Fig. 3 and promote an embodiment of hydraulic control system.The hydraulic crawler excavator of the present embodiment comprises swing arm rotary control valve and swing arm promotes control valve; Swing arm rotary control valve comprises rotary control valve core, and swing arm promotes control valve and comprises boom control valves core; The both sides of rotary control valve core connect left revolution guide oil circuit B1 and right-hand rotation guide oil circuit B2 respectively, promote the both sides controlling spool and connect swing arm decline guide oil circuit A1 and swing arm lifting guide oil circuit A2 respectively; Left revolution guide oil circuit B1 and right-hand rotation guide oil circuit B2 is all arranged described swing arm revolution pilot valve, pressure-gradient control valve is series in described left revolution guide oil circuit B1 and right-hand rotation guide oil circuit B2, can carry out throttling under described swing arm promotes the effect of guide oil to described left revolution guide oil circuit B1 and right-hand rotation guide oil circuit B2.
Below the method for operating of pilot valve of the present utility model is described:
When swing arm enhancing action or swing arm revolution action are carried out separately, described pressure-gradient control valve spool 13 is positioned at primary importance, and revolution guide oil circuit 11 is unimpeded, and the commutating speed of revolution main valve plug 9 is unaffected, thus the commutating speed of revolution action is unaffected; When swing arm promotes and swing arm turns round composite move, swing arm promotes guide oil and enters in pressure-gradient control valve through pressure-gradient control valve control port, push described pressure-gradient control valve spool 13 to the second place, to the throttling of described revolution guide oil circuit 11, reduce the revolution commutating speed of described revolution main valve plug 9.Wherein, the entrance of described installing hole, namely above-mentioned pressure-gradient control valve control port connects the lifting guide oil circuit of described Hydraulic Excavator's Boom, described spool limiting component has through hole, described swing arm lifting guide oil is pushed described pressure-gradient control valve spool 13 to the second place and is comprised: swing arm promotes guide oil and is introduced into installing hole entrance, then through described through hole, described spool 13 is pushed to the second place from described primary importance.
Composition graphs 3, when swing arm carries out lifting and pivotal composite move, according to the gyratory directions of reality, the guide oil that swing arm promotes in guide oil circuit enters left revolution pressure-gradient control valve or right-hand rotation pressure-gradient control valve, thus the spool 13 of described left revolution pressure-gradient control valve or right-hand rotation pressure-gradient control valve is pushed to the second place of described throttling.
In actual applications, if the time that now swing arm is preferential is short, wish that swing arm preferential time is a little long, that can by arranging smaller by described throttle orifice 2, if the time that swing arm is preferential is now long and cause swing arm and turn round inharmonious, so can throttle orifice 2 be changed larger.That is, can be set by the design to throttle orifice 2 size the swing arm preferential time comparatively easily.
Pressure-gradient control valve is integrated in pilot valve by the utility model, take full advantage of space, not need as prior art otherwise designed again that a new valve is installed, and pressure-gradient control valve itself only has three part compositions, structure is simple, easy to manufacture, easy installation and removal, and do not need to lay down part guide oil to delay pressure foundation, because this reducing power loss, decrease the energy consumption of system; In addition, pressure-gradient control valve of the present utility model is be connected in series with the connected mode of revolution guide oil circuit, therefore in actual applications, comparatively accurately can hold the control of commutating speed, when carrying out adjusted design throttle orifice size according to current swing arm to the difference of turning round precession time and required time, the interference of response lag can be reduced.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (8)
1. a swing arm revolution pilot valve, comprise valve body, swing arm revolution guide oil circuit is provided with in described valve body, it is characterized in that, also comprise pressure-gradient control valve, described pressure-gradient control valve to be arranged in described valve body and to be series in described swing arm revolution guide oil circuit, can carry out throttling under swing arm promotes the effect of guide oil to described swing arm revolution guide oil circuit.
2. swing arm revolution pilot valve as claimed in claim 1, it is characterized in that, this pressure-gradient control valve comprises spool, valve core reset parts and spool limiting component, described valve body has installing hole, described spool limiting component, spool, valve core reset parts are arranged successively from outside to inside along the axial direction of described installing hole in described installing hole, and described spool can be against on described spool limiting component by described valve core reset parts in an initial condition; Described spool can move to from making described swing arm turn round the unimpeded primary importance of guide's oil circuit the second place making described swing arm turn round the throttling of guide's oil circuit under swing arm promotes the effect of guide oil.
3. swing arm revolution pilot valve as claimed in claim 2, it is characterized in that, the entrance of described installing hole is positioned on the outer wall of described valve body, and connect swing arm lifting guide oil circuit, described spool limiting component has through hole, and described swing arm promotes guide oil can arrive one end contrary with described valve core reset parts on described spool by the through hole on the entrance of described installing hole and described spool limiting component.
4. swing arm turns round pilot valve as claimed in claim 2 or claim 3, it is characterized in that, described spool has the restriction that can make the throttling of revolution guide oil circuit towards one end of the entrance of described installing hole, described spool has the through hole that revolution guide oil circuit can be made unimpeded towards one end of described valve core reset parts, when described primary importance, the through hole on described spool is arranged in described revolution guide oil circuit; When the second place, the restriction on described spool is arranged in described revolution guide oil circuit.
5. swing arm turns round pilot valve as claimed in claim 2 or claim 3, and it is characterized in that, described spool limiting component is for having externally threaded hexagonal socket nut, and the through hole on described spool limiting component is inner hexagonal hole; The inwall of the entry position of described installing hole has internal thread, the external screw thread of described hexagonal socket nut and described screw-internal thread fit.
6. swing arm turns round pilot valve as claimed in claim 2 or claim 3, and it is characterized in that, one end of this pilot valve is provided with cavity, and the other end is provided with revolution guide hydraulic fluid port, and described cavity is connected by described revolution guide oil circuit with described revolution guide hydraulic fluid port.
7. swing arm revolution pilot valve as claimed in claim 6, it is characterized in that, described cavity accommodates back-moving spring and spring base, and described back-moving spring can prop up the main valve plug of swing arm rotary control valve in described cavity by described spring base.
8. a hydraulic crawler excavator, comprises swing arm rotary control valve and swing arm promotes control valve, it is characterized in that, also comprises the swing arm revolution pilot valve as described in one of claim 1 ~ 7; Described swing arm rotary control valve comprises rotary control valve core, and described swing arm promotes control valve and comprises boom control valves core; The both sides of described rotary control valve core connect left revolution guide's oil circuit and right-hand rotation guide oil circuit respectively, and the both sides that described lifting controls spool connect swing arm decline guide's oil circuit and swing arm lifting guide oil circuit respectively; Described left revolution guide's oil circuit and right-hand rotation guide oil circuit all arrange described swing arm revolution pilot valve, described pressure-gradient control valve is series in described left revolution guide's oil circuit and right-hand rotation guide oil circuit, can carry out throttling under described swing arm promotes the effect of guide oil to described left revolution guide's oil circuit and right-hand rotation guide oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513232.2U CN204163139U (en) | 2014-09-05 | 2014-09-05 | A kind of swing arm revolution pilot valve and hydraulic crawler excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513232.2U CN204163139U (en) | 2014-09-05 | 2014-09-05 | A kind of swing arm revolution pilot valve and hydraulic crawler excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204163139U true CN204163139U (en) | 2015-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420513232.2U Withdrawn - After Issue CN204163139U (en) | 2014-09-05 | 2014-09-05 | A kind of swing arm revolution pilot valve and hydraulic crawler excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204163139U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386484A (en) * | 2014-09-05 | 2016-03-09 | 徐工集团工程机械股份有限公司 | Movable arm rotation pilot valve and hydraulic excavator |
| CN112411647A (en) * | 2020-12-02 | 2021-02-26 | 龙工（上海）精工液压有限公司 | Swing arm pair rotation priority control system for hydraulic excavator and priority valve |
-
2014
- 2014-09-05 CN CN201420513232.2U patent/CN204163139U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386484A (en) * | 2014-09-05 | 2016-03-09 | 徐工集团工程机械股份有限公司 | Movable arm rotation pilot valve and hydraulic excavator |
| CN105386484B (en) * | 2014-09-05 | 2017-11-21 | 徐工集团工程机械股份有限公司 | A kind of swing arm revolution pilot valve and hydraulic crawler excavator |
| CN112411647A (en) * | 2020-12-02 | 2021-02-26 | 龙工（上海）精工液压有限公司 | Swing arm pair rotation priority control system for hydraulic excavator and priority valve |
| CN112411647B (en) * | 2020-12-02 | 2024-03-12 | 龙工（上海）精工液压有限公司 | Swing arm-to-rotation priority control system and priority valve for hydraulic excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150218 Effective date of abandoning: 20171121 |
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| AV01 | Patent right actively abandoned |