CN103672138A - Single-pedal type foot valve - Google Patents
Single-pedal type foot valve Download PDFInfo
- Publication number
- CN103672138A CN103672138A CN201310712537.6A CN201310712537A CN103672138A CN 103672138 A CN103672138 A CN 103672138A CN 201310712537 A CN201310712537 A CN 201310712537A CN 103672138 A CN103672138 A CN 103672138A
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- CN
- China
- Prior art keywords
- valve
- pedal
- spool
- spring
- free bearing
- Prior art date
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/62—Pedals or like operating members, e.g. actuated by knee or hip
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a single-pedal type foot valve. The single-pedal type foot valve is characterized by comprising a pedal, the pedal is connected with a connecting plate, a hinged support, a hinge base, push rod bushing assemblies and a small valve body in sequence, push rods penetrate through the connecting plate, the hinged support, the hinge base, the push rod bushing assemblies, the small valve body and a piston, and the push rods are connected with a valve plug assembly arranged in a valve body. The single-pedal type foot valve is compact in structure; due to the fact that the design that an O-shaped ring and a Y-shaped sealing ring are used for sealing and guiding is adopted, the frequency of the phenomenon of internal leakage can be reduced, the opening-and-closing characteristic is improved, the single-pedal type foot valve has the advantage that stability of outlet pressure is good, the service life of a pilot system is prolonged, and overall stability of an excavator system is ensured.
Description
Technical field
The present invention relates to a kind of excavator single-pedal foot valve, belong to control valve technical field.
Background technique
Single-pedal foot valve is mainly used in the engineering machinery such as excavator and controls pilot control system oil circuit in hydraulic system, by oil sources valve, provide pilot system oil circuit working pressure, control walking pilot system oil circuit whereabouts, control main valve realization walking executive component and divide accordingly action or combination action, be the important component part of pilot control system, be mainly used in walking engineering machinery or high pressure, high-volume hydraulic are handled mechanically.Existing excavator with single-pedal foot-operated due to machining accuracy and the manufacturability of complex structure, part have relatively high expectations, in let out large, easily there is clamping stagnation in spool, actuator port pressure surge is larger, affect guide's generic operation element and normally use, and energy consumption is high, cost is high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of compact structure, reliability is high, energy consumption is low, cost is low, in let out little excavator single-pedal.
In order to solve the problems of the technologies described above, the invention provides a kind of single-pedal foot valve, it is characterized in that, comprise foot treadle, foot treadle connects connecting plate, free bearing, hinged seat, pushrod bushing assembly and little valve body successively, push rod is arranged in connecting plate, free bearing, hinged seat, pushrod bushing assembly, little valve body, piston, and push rod is connected with the Spool assembly in being located at valve body.
Preferably, described foot treadle comprises the support being connected with connecting plate, is located at the pedal on support and is provided with the pedal foot pad on pedal.
Preferably, described pedal foot pad adopts styrene-butadiene rubber; Described support and pedal adopt Q235 material.
Preferably, described free bearing assembly comprises that free bearing is provided with screw, and screw is fixed on free bearing by screw-thread fit, and end face and the free bearing of this screw are linear; Tip of screw is provided with nut, and the end face of this nut overlaps with the surface of free bearing.
Preferably, described pushrod bushing assembly comprises lubricated dixie cup, pushrod bushing, O shape circle and seal ring.Pushrod bushing once connects lubricated dixie cup, O shape circle, seal ring.
Preferably, described Spool assembly comprises spool, and spool adopts second order concentric structure; In valve body, be provided with valve core spring chamber, spool is arranged in valve core spring chamber, and the inside top in valve core spring chamber is provided with pressure adjusting spring, and pressure adjusting spring is fixed in valve core spring chamber by spring seat, between spring seat spool and spring seat, is provided with collar; Bottom, valve core spring chamber is provided with Returnning spring, and spool is arranged in pressure adjusting spring, Returnning spring; Spool is provided with for by adjusting initial tension of spring, adjusts the back-up ring of output secondary pressure, is provided with throttling groove on convex shoulder, and valve port is non-all-round opening.
By foot treadle, realize the less operating torque of operator; By free bearing, realize the rotation of foot treadle operation both direction; By free bearing, realize the operation to push rod upper-lower position; By pushrod bushing assembly, realize the sealing to hydraulic oil; By push rod, realize the operation to Spool assembly upper-lower position; By valve body, realize outlet pressure and act on corresponding executive component.
The invention has the advantages that: improve mechanical manoeuvring performance, alleviate manipulator's labor intensity, install and use the advantages such as easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of single-pedal foot valve provided by the invention;
Fig. 2 is the sectional view of Fig. 1 side view;
Fig. 3 is the sectional view of free bearing assembly;
Fig. 4 is the sectional view of pushrod bushing assembly;
Fig. 5 is the sectional view of Spool assembly;
Fig. 6 is the partial enlarged drawing of I in Fig. 5;
Schematic diagram when Fig. 7 is Spool assembly pressurized;
Fig. 8 is the hydraulic schematic diagram of single-pedal foot valve provided by the invention;
Fig. 9 is the characteristic curve of pan position under the outlet of single-pedal foot valve and plunger.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
As shown in Fig. 1-7, a kind of single-pedal foot valve that can improve excavator fine motion operation provided by the invention, comprise foot treadle 1-1, connecting plate 1-2, free bearing 2-1, hinged seat 2-3, pushrod bushing assembly 2-5, push rod 2-6, little valve body 1-3, valve body 1-4, Spool assembly 2-6.Spool assembly 2-6 is integrated in valve body 1-4; Foot treadle 1-1 is connected with connecting plate 1-2; Hinged seat 2-4 connects valve body 1-4 and free bearing 2-2, and little valve body 1-3 connects valve body 1-4.By standard piece connecting hinge joint chair 2-4 and free bearing 2-2, by standard piece connecting hinge joint chair 2-4, little valve body 1-3 and valve body 1-4.
Pedal foot pad 2-7 selects styrene-butadiene rubber, has wear-resisting, heat-resisting, ageing-resistant and curing rate, has the very long life-span, and cost is low.Support 2-9 and pedal 2-8 select Q235 material, and tensile strength is high, can adapt to long-time high strength continuous operation.Foot treadle 1-1 fixes by standard piece and connecting plate 1-2.Connecting plate 1-2 is through Overheating Treatment, and surface hardness is high, and long service life has good rust protection.Dust-proof cover 2-2 selects the good nonmetallic material of characteristic.Push rod 2-6 is through special heat treatment, long service life.
During use, manipulator applies less moment and handles foot treadle 1-1, foot treadle 1-1 drives free bearing 2-2 to rotate, free bearing 2-2 after rotation acts on the push rod 1-6 of specific direction, thereby promote corresponding Spool assembly 2-6 work, from oil inlet P oil-feed, valve body 1-3 above locates output at corresponding actuator port P ' and meets linear characteristic pressure oil.
Spool assembly 2-7 is integrated in valve body 1-4, comprises collar 5-1, spring seat 5-2, pressure adjusting spring 5-3, Returnning spring 5-4, back-up ring 5-5, spool 5-6 and valve body 1-3.Major part spool 5-5 is second order concentric structure, its chamber, end communicates with valve core spring chamber (oil back chamber) by hollow oil duct, damping hole, the adjustable spool dynamic process of damping hole, for reducing hydraulic shock, improve the stationarity of handling, on the convex shoulder 6 of spool 5-4, have throttling groove 7, valve port is non-all-round opening.
The present invention is straight ejector half reduction valve, and when inoperation foot treadle 1-1, by Returnning spring, 5-3 remains on meta by foot valve, working oil chamber communicates with oil back chamber, and actuator port P ' pressure is zero, is controlled connection spool in meta, equipment is failure to actuate, as shown in Figure 5.
When manipulator handles foot treadle 1-1, free bearing 2-1 promotes push rod 2-5 and moves down, the spring seat 5-2 being connected with push rod 2-5 overcomes Returnning spring 5-3, promoting spool 5-4 moves down, working oil chamber communicates gradually with oil suction chamber (oil inlet P), increase gradually along with operational torque, spool 5-4 increases toward bottom offset, working oil chamber and oil suction chamber area of contact increase thereupon, working oil chamber pressure rise, the pressure of actuator port P ' is determined by spring force, thereby determined by foot treadle 1-1 displacement amount, the pilot pressure obtaining is controlled the spool aperture in multi-way valve connection, obtain the speed of different equipments, as shown in Figure 7.
When the external force on acting on foot treadle removes, spool 5-4 moves under hydraulic coupling and Returnning spring 5-3 effect, and working oil chamber and oil suction chamber (oil inlet P) are closed, working oil chamber pressure drop.
Claims (6)
1. a single-pedal foot valve, it is characterized in that, comprise foot treadle (1-1), foot treadle (1-1) connects connecting plate (1-2), free bearing (2-1), hinged seat (2-3), pushrod bushing assembly (2-4) and little valve body (1-3) successively, push rod (2-5) is arranged in connecting plate (1-2), free bearing (2-3), hinged seat (2-3), pushrod bushing assembly (2-4), little valve body (1-3), piston (2-10), and push rod (2-5) is connected with the Spool assembly (2-6) in being located at valve body (1-4).
2. a kind of single-pedal foot valve as claimed in claim 1, it is characterized in that, described foot treadle (1-1) comprises the support (2-9) being connected with connecting plate (1-2), is located at the pedal (2-8) on support (2-9) and is provided with the pedal foot pad (2-7) on pedal (2-8).
3. a kind of single-pedal foot valve as claimed in claim 2, is characterized in that, described pedal foot pad (2-7) adopts styrene-butadiene rubber; Described support (2-9) and pedal (2-8) adopt Q235 material.
4. a kind of single-pedal foot valve as claimed in claim 1, it is characterized in that, described free bearing assembly (2-1) comprises that free bearing (3-1) is provided with screw (3-3), it is upper that screw is fixed on free bearing (3-1) by screw-thread fit, and the end face of this screw (3-3) and free bearing (3-1) are linear; Screw (3-3) end is provided with nut (3-2), and the end face of this nut overlaps with the surface of free bearing (3-1).
5. a kind of single-pedal foot valve as claimed in claim 1, is characterized in that, described pushrod bushing assembly (2-4) comprises lubricated dixie cup (4-1), pushrod bushing (4-2), O shape circle (4-3) and seal ring (4-4).Pushrod bushing once connects lubricated dixie cup (4-1), O shape circle (4-3), seal ring (4-4).
6. a kind of single-pedal foot valve as claimed in claim 1, is characterized in that, described Spool assembly (2-6) comprises spool (5-4), and spool (5-4) adopts second order concentric structure; In valve body (1-4), be provided with valve core spring chamber, spool (2-6) is arranged in valve core spring chamber, the inside top in valve core spring chamber is provided with pressure adjusting spring (5-5), pressure adjusting spring (5-5) is fixed in valve core spring chamber by spring seat (5-2), between spring seat (5-2) spool (5-4) and spring seat (5-2), is provided with collar (5-1); Bottom, valve core spring chamber is provided with Returnning spring (5-3), and spool (2-6) is arranged in pressure adjusting spring (5-5), Returnning spring (5-3); Spool (2-6) is provided with for by adjusting initial tension of spring, adjusts the back-up ring (5-6) of output secondary pressure, is provided with throttling groove (7) on convex shoulder (6), and valve port is non-all-round opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310712537.6A CN103672138A (en) | 2013-12-20 | 2013-12-20 | Single-pedal type foot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310712537.6A CN103672138A (en) | 2013-12-20 | 2013-12-20 | Single-pedal type foot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103672138A true CN103672138A (en) | 2014-03-26 |
Family
ID=50310532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310712537.6A Pending CN103672138A (en) | 2013-12-20 | 2013-12-20 | Single-pedal type foot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103672138A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820464A (en) * | 2015-05-28 | 2015-08-05 | 江苏柳工机械有限公司 | Foot pedal operating mechanism |
| CN105937651A (en) * | 2016-05-19 | 2016-09-14 | 龙工（上海）精工液压有限公司 | Rotating assembly capable of effectively decreasing stagger amount of foot operated valve |
| WO2020180992A1 (en) * | 2019-03-04 | 2020-09-10 | Consolidated Foam | Step-on water flow regulation device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5566716A (en) * | 1994-11-10 | 1996-10-22 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic control valve |
| JP2004183837A (en) * | 2002-12-05 | 2004-07-02 | Kawasaki Precision Machinery Ltd | Valve operating device and pilot valve comprising the same |
| CN201043541Y (en) * | 2007-04-30 | 2008-04-02 | 江苏鼎晟液压有限公司 | Foot control valve |
| CN201575228U (en) * | 2009-12-15 | 2010-09-08 | 青岛凯锐斯通液压机械有限公司 | Foot valve |
| CN202884220U (en) * | 2012-02-27 | 2013-04-17 | 宁波弗莱格液压有限公司 | Simply connected foot valve |
| CN203670997U (en) * | 2013-12-20 | 2014-06-25 | 龙工（上海）精工液压有限公司 | Single-pedal type foot-operated valve |
-
2013
- 2013-12-20 CN CN201310712537.6A patent/CN103672138A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5566716A (en) * | 1994-11-10 | 1996-10-22 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic control valve |
| JP2004183837A (en) * | 2002-12-05 | 2004-07-02 | Kawasaki Precision Machinery Ltd | Valve operating device and pilot valve comprising the same |
| CN201043541Y (en) * | 2007-04-30 | 2008-04-02 | 江苏鼎晟液压有限公司 | Foot control valve |
| CN201575228U (en) * | 2009-12-15 | 2010-09-08 | 青岛凯锐斯通液压机械有限公司 | Foot valve |
| CN202884220U (en) * | 2012-02-27 | 2013-04-17 | 宁波弗莱格液压有限公司 | Simply connected foot valve |
| CN203670997U (en) * | 2013-12-20 | 2014-06-25 | 龙工（上海）精工液压有限公司 | Single-pedal type foot-operated valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820464A (en) * | 2015-05-28 | 2015-08-05 | 江苏柳工机械有限公司 | Foot pedal operating mechanism |
| CN105937651A (en) * | 2016-05-19 | 2016-09-14 | 龙工（上海）精工液压有限公司 | Rotating assembly capable of effectively decreasing stagger amount of foot operated valve |
| CN105937651B (en) * | 2016-05-19 | 2018-06-19 | 龙工（上海）精工液压有限公司 | A kind of rotating assembly for effectively reducing foot valve offset |
| WO2020180992A1 (en) * | 2019-03-04 | 2020-09-10 | Consolidated Foam | Step-on water flow regulation device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |