CN105422532A - Buffering foot-operated valve - Google Patents
Buffering foot-operated valve Download PDFInfo
- Publication number
- CN105422532A CN105422532A CN201510809611.5A CN201510809611A CN105422532A CN 105422532 A CN105422532 A CN 105422532A CN 201510809611 A CN201510809611 A CN 201510809611A CN 105422532 A CN105422532 A CN 105422532A
- Authority
- CN
- China
- Prior art keywords
- valve
- buffing pad
- valve body
- room
- push rod
- 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.)
- Granted
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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
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanically-Actuated Valves (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a buffering foot-operated valve comprising a footrest, push rods, an upper valve body, a lower valve body, pressure reducing valves and buffering seats, wherein the upper valve body is fixedly connected with the lower valve body; the footrest is connected with the upper ends of the push rods; the buffering seats are fixedly connected with the push rods; pressure reducing valve chambers are arranged in the lower valve body; the pressure reducing valves are arranged in the pressure reducing valve chambers; valve element holes are formed in the lower ends of the pressure reducing valve chambers; and the pressure reducing valve chambers are respectively communicated with oil inlets and oil control holes through the valve element holes. The buffering seats are arranged inside the valve bodies of the foot-operated valve and move along with the actions of the push rods to generate acting forces on hydraulic oil in buffering seat chambers in the moving process, and the counter-acting force of the hydraulic oil to the push rods is reduced through damping valves arranged on the buffering seats, so that the shake on the footrest is eliminated, and furthermore the working precision of an engineering machine is improved.
Description
Technical field
The invention belongs to hydrovalve technical field, refer to a kind of buffer foot valve especially.
Background technique
Foot valve is engineering machinery for one of parts of controlling run, and the foot valve of existing technology is all installed in operator cabin, by operator or drive circle foot operation and do.
The characteristic of engineering machinery and working environment determine it can produce larger vibrations in the course of the work, and such vibrations can feed back on the pin of operator by foot valve, the foot of operator can ceaselessly be shaken, not only impact is brought on the operation of operator, even can have influence on workmanship and working efficiency.
Summary of the invention
The object of this invention is to provide a kind of improvement opportunity scheme of foot valve, by the technical program, the shake of foot treadle can be effectively reduced, improve operating accuracy, and reduce the impact on operator.
The present invention is achieved by the following technical solutions:
A kind of buffer foot valve, includes foot treadle, push rod, upper valve body, lower valve body, reduction valve and buffing pad;
Described upper valve body is fixedly connected with described lower valve body; Described foot treadle is connected with the upper end of described push rod;
Described upper valve body is provided with push rod perforation; Buffing pad room is provided with in described upper valve body; Bore a hole with described push rod and be communicated with in described buffing pad room; It is indoor that described buffing pad is arranged at described buffing pad, and described buffing pad is fixedly connected with described push rod;
Described buffing pad is provided with the first through hole; Described buffing pad room is divided into upper buffing pad room and lower buffing pad room by described slow seat; Described upper buffing pad room is communicated with by described first through hole with described lower buffing pad room;
The first oil back chamber is provided with in described upper valve body; Described first oil back chamber is communicated with described upper buffing pad room and return opening respectively;
Decompression valve chamber is provided with in described lower valve body; It is indoor that described reduction valve is arranged at described reduction valve; The lower end of described push rod is connected with described reduction valve;
Described lower valve body is provided with the second oil back chamber, filler opening, control port; Described decompression valve chamber is connected with described second oil back chamber, described filler opening, described control port and described lower buffing pad room respectively;
Be communicated with by the second through hole between described decompression valve chamber with described lower buffing pad room;
Described second oil back chamber is connected with described spill port;
The lower end of described spool is provided with spool bore; Described decompression valve chamber is communicated with described filler opening and described control port respectively by described spool bore.
Described first through hole is provided with the first orifice valve; Described upper buffing pad room and described lower buffing pad room are by described first orifice valve unilaterally connected.
Described second through hole is provided with the second orifice valve; By described second orifice valve unilaterally connected between described decompression valve chamber and described lower buffing pad room.
Described second oil back chamber is communicated with described return opening by described first oil back chamber.
Described reduction valve comprises spool, relief spring and Returnning spring; Described relief spring and described Returnning spring are all placed on described spool; Described relief spring is between described spool and described Returnning spring; The upper end of described spool is connected with described push rod.
The invention has the beneficial effects as follows:
The present invention by arranging buffing pad in the valve body of foot valve, and buffing pad moves along with the action of push rod, in buffing pad movement process, active force is produced to the hydraulic oil of buffing pad indoor, and by the reaction force that the orifice valve reduction hydraulic oil on buffing pad produces push rod, thus the shake on elimination foot treadle, thus improve the operating accuracy of engineering machinery.
Accompanying drawing explanation
Fig. 1 is buffer foot plate structure schematic diagram of the present invention;
Fig. 2 is oil pocket schematic diagram in upper valve body of the present invention and lower valve body;
Fig. 3 is the A place enlarged view of Fig. 1;
Fig. 4 is the B place enlarged view of Fig. 1.
Description of reference numerals
1 foot treadle, 2 push rods, 3 upper valve bodies, 4 times valve bodies, 5 reduction valve, 6 buffing pad rooms, 7 buffing pads, 8 decompression valve chambers, 9 control ports, 10 first oil back chambers, 11 second oil back chambers, 12 return openings, 13 filler openings, 14 spool bore, 51 spools, 52 Returnning springs, 53 relief springs, buffing pad room on 61,62 times buffing pad rooms, 71 first through holes.
Embodiment
Describe technological scheme of the present invention in detail by the following examples, following embodiment is only exemplary, only can be used for explaining and technological scheme of the present invention being described, and can not be interpreted as being the restriction to technical solution of the present invention.
The invention provides a kind of buffer foot valve, as shown in Figures 1 to 4, include foot treadle 1, push rod 2, upper valve body 3, lower valve body 4, reduction valve 5 and buffing pad 7; In this application, the structure of lower valve body is identical with the foot valve valve body structure of existing technology, and the hydraulic work principle of the application presses the work of direct moving type hydraulic valve principle.
Described upper valve body 3 is fixedly connected with described lower valve body 4; Also the leakage proof parts such as pad are provided with between upper valve body and lower valve body.Described foot treadle 1 is connected with the movable upper end of described push rod 2; When stepping on foot treadle, foot treadle compressing push rod moves downward; When unclamping foot treadle, move upward under the effect of push rod Returnning spring in the effect and reduction valve of hydraulic oil, jack-up foot treadle, makes foot treadle return simultaneously.
Described upper valve body 3 is provided with push rod perforation; Buffing pad room 6 is provided with in described upper valve body; Bore a hole with described push rod and be communicated with in described buffing pad room; Described buffing pad 7 is arranged in described buffing pad room 6, and described buffing pad 7 is fixedly connected with described push rod 2; Along with the to-and-fro motion of push rod, buffing pad is simultaneously in the indoor to-and-fro motion of buffing pad.
Described buffing pad 7 is provided with the first through hole 71; Described buffing pad room 6 is divided into upper buffing pad room 61 and lower buffing pad room 62 by described slow seat 7; Described upper buffing pad room 61 is communicated with by described first through hole 71 with described lower buffing pad room 62; Described first through hole is provided with the first orifice valve; Described upper buffing pad room and described lower buffing pad room are by described first orifice valve unilaterally connected.When buffing pad moves downward, hydraulic oil enters upper buffing pad room by lower buffing pad room; When buffing pad moves upward, the first orifice valve is closed, and hydraulic oil can not be entered in lower buffer cell by upper buffer cell.
The first oil back chamber 10 is provided with in described upper valve body 3; Described first oil back chamber 10 is communicated with described upper buffing pad room 61 and return opening 12 respectively.
Be provided with decompression valve chamber 8 in described lower valve body 4, in the present embodiment, be provided with four decompression valve chambers in lower valve body altogether, each reduction valve indoor arrange a reduction valve; Described reduction valve 5 is arranged in described decompression valve chamber 8; The lower end of described push rod is connected with described reduction valve.
Described lower valve body 4 is provided with the second oil back chamber 11, filler opening 13, control port 9; Described decompression valve chamber is connected with described second oil back chamber, described filler opening, described control port and described lower buffing pad room respectively;
Be communicated with by the second through hole between described decompression valve chamber with described lower buffing pad room; Described second through hole is provided with the second orifice valve; By described second orifice valve unilaterally connected between described decompression valve chamber and described lower buffing pad room.Namely hydraulic oil enters lower buffing pad room from decompression valve chamber by the second orifice valve, and can not enter decompression valve chamber from lower buffing pad room.
Described second oil back chamber is connected with described spill port; In the present embodiment, described second oil back chamber is communicated with described return opening by described first oil back chamber.
The lower end of described spool 51 is provided with spool bore 14; Described decompression valve chamber is communicated with described filler opening and described control port respectively by described spool bore.
Described reduction valve 5 comprises spool 51, relief spring 53 and Returnning spring 52; Described relief spring and described Returnning spring are all placed on described spool; Described relief spring is between described spool and described Returnning spring; The upper end of described spool is connected with described push rod.
When without act of operation, by Returnning spring, foot treadle is remained on neutral position, control port, spool bore, filler opening are connected with fuel tank.
When foot treadle is operated, push rod overcomes the power of Returnning spring and relief spring, now, under relief spring promotes, corresponding spool moves downward, and blocks the hole that the second oil back chamber is connected with corresponding decompression valve chamber, and control port is communicated with filler opening by spool bore by the valve chamber that simultaneously makes to reduce pressure accordingly, when the fluid pressure balance that power and the control port of spool and relief spring produce, control to start.
Due to the interaction between spool and relief spring, the pressure of corresponding control port and the stroke of push rod proportional, thus with under foot treadle, to step on position proportional.
Push rod presses down with foot treadle, buffing pad is moved down, because buffing pad is provided with the first orifice valve, and buffing pad indoor are full of hydraulic oil, along with moving down of buffing pad, hydraulic oil energy-absorbing enters the first oil back chamber by first cloudy Buddhist nun's valve the first orifice valve flowing through buffing pad slowly.When steering force reduces gradually, buffing pad moves up along with push rod, because the one-way conduction of the first orifice valve, make in the indoor forming section vacuum of lower buffing pad, pressure reduction is formed like this between upper buffing pad room and lower buffing pad room, and the pressure of upper buffing pad indoor is placed on the pressure of lower buffing pad indoor, after this pressure difference makes the steering force be used as on foot treadle suddenly disappear, foot treadle can only along with push rod slowly on move.Simultaneously, between lower buffing pad room and decompression valve chamber, mineralization pressure is poor, now the pressure of reduction valve indoor is greater than the pressure of lower buffing pad indoor, the hydraulic oil of reduction valve indoor is made to enter lower buffing pad by the second orifice valve so indoor, to fill up the vacuum section of lower buffing pad indoor, for again moving down of following buffing pad, replenisher force feed.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (5)
1. a buffer foot valve, is characterized in that: include foot treadle, push rod, upper valve body, lower valve body, reduction valve and buffing pad;
Described upper valve body is fixedly connected with described lower valve body; Described foot treadle is connected with the upper end of described push rod;
Described upper valve body is provided with push rod perforation; Buffing pad room is provided with in described upper valve body; Bore a hole with described push rod and be communicated with in described buffing pad room; It is indoor that described buffing pad is arranged at described buffing pad, and described buffing pad is fixedly connected with described push rod;
Described buffing pad is provided with the first through hole; Described buffing pad room is divided into upper buffing pad room and lower buffing pad room by described buffing pad; Described upper buffing pad room is communicated with by described first through hole with described lower buffing pad room;
The first oil back chamber is provided with in described upper valve body; Described first oil back chamber is communicated with described upper buffing pad room and return opening respectively;
Decompression valve chamber is provided with in described lower valve body; It is indoor that described reduction valve is arranged at described reduction valve; The lower end of described push rod is connected with described reduction valve;
Described lower valve body is provided with the second oil back chamber, filler opening, control port; Described decompression valve chamber is connected with described second oil back chamber, described filler opening, described control port and described lower buffing pad room respectively;
Be communicated with by the second through hole between described decompression valve chamber with described lower buffing pad room;
Described second oil back chamber is connected with described spill port;
The lower end of described spool is provided with spool bore; Described decompression valve chamber is communicated with described filler opening and described control port respectively by described spool bore.
2. buffer foot valve according to claim 1, is characterized in that: on described first through hole, be provided with the first orifice valve; Described upper buffing pad room and described lower buffing pad room are by described first orifice valve unilaterally connected.
3. buffer foot valve according to claim 1, is characterized in that: on described second through hole, be provided with the second orifice valve; By described second orifice valve unilaterally connected between described decompression valve chamber and described lower buffing pad room.
4. buffer foot valve according to claim 1, is characterized in that: described second oil back chamber is communicated with described return opening by described first oil back chamber.
5. buffer foot valve according to claim 1, is characterized in that: described reduction valve comprises spool, relief spring and Returnning spring; Described relief spring and described Returnning spring are all placed on described spool; Described relief spring is between described spool and described Returnning spring; The upper end of described spool is connected with described push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510809611.5A CN105422532B (en) | 2015-11-20 | 2015-11-20 | A kind of buffer foot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510809611.5A CN105422532B (en) | 2015-11-20 | 2015-11-20 | A kind of buffer foot valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422532A true CN105422532A (en) | 2016-03-23 |
| CN105422532B CN105422532B (en) | 2017-09-26 |
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ID=55500989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510809611.5A Active CN105422532B (en) | 2015-11-20 | 2015-11-20 | A kind of buffer foot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422532B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291675A (en) * | 1991-11-12 | 1994-03-08 | Honda Giken Kogyo Kabushiki Kaisha | Fluid pressure control system with an accumulator responsive to a loss of system pressure |
| CN102128305A (en) * | 2010-12-31 | 2011-07-20 | 王贺新 | Pedal pneumatic valve |
| CN202597334U (en) * | 2012-05-14 | 2012-12-12 | 宁波海宏液压有限公司 | Buffering safety valve |
| CN103335163A (en) * | 2013-06-24 | 2013-10-02 | 玉林市富山液压件制造有限公司 | Traveling pilot valve with buffering function |
| CN103867764A (en) * | 2014-03-03 | 2014-06-18 | 青岛力克川液压机械有限公司 | Overflow valve for excavator walking motor |
| JP2015187469A (en) * | 2014-03-27 | 2015-10-29 | 株式会社ショーワ | Hydraulic draft gear |
-
2015
- 2015-11-20 CN CN201510809611.5A patent/CN105422532B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291675A (en) * | 1991-11-12 | 1994-03-08 | Honda Giken Kogyo Kabushiki Kaisha | Fluid pressure control system with an accumulator responsive to a loss of system pressure |
| CN102128305A (en) * | 2010-12-31 | 2011-07-20 | 王贺新 | Pedal pneumatic valve |
| CN202597334U (en) * | 2012-05-14 | 2012-12-12 | 宁波海宏液压有限公司 | Buffering safety valve |
| CN103335163A (en) * | 2013-06-24 | 2013-10-02 | 玉林市富山液压件制造有限公司 | Traveling pilot valve with buffering function |
| CN103867764A (en) * | 2014-03-03 | 2014-06-18 | 青岛力克川液压机械有限公司 | Overflow valve for excavator walking motor |
| JP2015187469A (en) * | 2014-03-27 | 2015-10-29 | 株式会社ショーワ | Hydraulic draft gear |
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| Publication number | Publication date |
|---|---|
| CN105422532B (en) | 2017-09-26 |
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