CN107882976A - A kind of electro-hydraulic manipulation valve of loading machine gearbox - Google Patents
A kind of electro-hydraulic manipulation valve of loading machine gearbox Download PDFInfo
- Publication number
- CN107882976A CN107882976A CN201711486923.2A CN201711486923A CN107882976A CN 107882976 A CN107882976 A CN 107882976A CN 201711486923 A CN201711486923 A CN 201711486923A CN 107882976 A CN107882976 A CN 107882976A
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- China
- Prior art keywords
- valve body
- valve
- advance
- speed
- pressure
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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.)
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Classifications
-
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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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
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to technical field of hydraulic pressure, the electro-hydraulic manipulation valve of loading machine gearbox is provided, including upper valve body, lower valve body, upper valve body is provided with one group of advance valve body being connected respectively with direction valve rod and retreats valve body, the speed valve body being connected with speed valve rod is provided with the middle part of advance valve body and retrogressing valve body, one end of speed valve body sets the buffer gear connected with oil inlet, the phase homonymy of advance valve body is provided with the principal pressure governor motion being connected with buffer gear, relief valve mechanism is provided with the middle part of advance valve body, advance valve body, valve body is retreated to connect with the opposite side of speed valve body, and it is respectively equipped with pressure interface, end is provided with the magnetic valve of control pressure interface.Each valve body reasonable layout on upper valve body, while meeting that each gear coordinates, is reduced impact by the present invention, realizes the function of regulation pressure, easy to process, performance reliability and comfort level lifting.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, and in particular to a kind of loading machine gearbox speed change operating valve.
Background technology
Zl50 loader gearbox speed change operating valve is mechanical rod-pulling type at present, and mechanical speed change operating valve is simple in construction, gearshift
Impact is excessive, and driver's operation comfort is poor.Prior art 1 provides a kind of loading machine gearbox electro-hydraulic manipulation valve
(CN205841729U) speed valve rod, two other relative side, are provided with using the relative side of two-bit triplet electromagnetic valve core
Provided with direction valve rod；Speed valve rod is provided with shearing device, and the side of direction valve rod is provided with buffer unit, set above upper valve body
There is the oil-out and oil inlet connected with two-bit triplet electromagnetic valve core.The manipulation valve can reduce impact to a certain extent, but its
Structure is relative complex, processing difficulties, and buffering effect is not good enough, can not adjust pressure.
The content of the invention
Present invention aim to address existing loading machine gearbox mechanical changeover to buffer excessive, processing difficulties, and provides gearbox
Electro-hydraulic manipulation valve, improve driver's operation comfort and processing convenience, it is convenient to adjust pressure.
To achieve these goals, the present invention is realized using following technical scheme,
The electro-hydraulic manipulation valve of loading machine gearbox, including upper valve body, lower valve body, upper valve body are connected with direction valve rod respectively provided with one group
Advance valve body and retreat valve body, advance valve body and retreat in the middle part of valve body provided with the speed valve body that is connected with speed valve rod, speed
One end of valve body sets the buffer gear connected with oil inlet, and the phase homonymy of advance valve body is provided with the principal pressure being connected with buffer gear
Governor motion, advance valve body middle part are provided with relief valve mechanism, and advance valve body, retrogressing valve body connect with the opposite side of speed valve body,
And pressure interface is respectively equipped with, end is provided with the magnetic valve of control pressure interface.
Preferably, the buffer gear includes cushion chamber, and inside is provided with the piston perpendicular with oil inlet, piston connection bullet
Spring device, end are provided with blanking cover.
Further, the principal pressure adjusting means includes the pressure regulating cavity connected with cushion chamber, and plug is provided with inside pressure regulating cavity
Post and opening, pressure regulating cavity end are provided with the regulating bolt of regulation stick harness and opened gap.
Further, the safety valve is located at advance valve body side surface, and valve element is vertically arranged with oil circuit, and outside is provided with fixed spiral shell
Bolt.
Preferably, the magnetic valve is two-bit triplet magnetic valve, and pressure interface is respectively perpendicular valve element setting.
The present invention is advantageous in that by each valve body reasonable layout on upper valve body, meet that each gear coordinates same
When, impact is reduced, realizes the function of regulation pressure, easy to process, performance reliability and comfort level lifting.
Brief description of the drawings
Fig. 1 overall structure diagrams of the present invention；
Fig. 2 A-A cross section structure diagrams；
Fig. 3 B-B cross section structure diagrams；
Fig. 4 C-C cross section structure diagrams；
1. upper valve body in figure, 2. lower valve bodies, 3. blanking covers, 4. stick harnesses, 5. pistons, 6. sealing shrouds, 7. buffer units, 8. pressure regulation bullets
Spring, 9. valve core springs, 10. valve elements, 11. sealing rings, 12. fixed bolts, 13. regulating bolts, 14. sealing gaskets, 15. sealing rings,
16. magnetic valve, 17. retreat valve body, 18. speed valve bodies, 19. pressure interfaces, 20. advance valve bodies.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings,
As shown in figure 1, the present invention provides a kind of electro-hydraulic manipulation valve of loading machine gearbox, including upper valve body, lower valve body, upper valve body with
Lower valve body is separable to be fixedly connected, and upper valve body is provided with three raised valve bodies, one of which advance valve body 20 and retrogressing valve body
17, two valve bodies are connected the control realized to being advanced before and after machine with direction valve rod respectively, and in advance valve body and retrogressing valve body
Portion is provided with the speed valve body 18 being connected with speed valve rod, and speed valve rod realizes the change to gait of march.Wherein advance valve body, after
The cavity for being provided with valve body and speed valve body and passing through hydraulic oil is moved back, cavity is interconnected, and one end of cavity, which is equipped with, performs control
The magnetic valve 16 of system, cavity are connected provided with pressure interface 19 with control unit.
Speed valve body is provided with buffer gear, buffer gear connection outside oil inlet, as shown in figure 3, buffer gear includes
Cushion chamber, the cushion chamber other end relative with magnetic valve are internally positioned to be provided with the piston 5 perpendicular with oil inlet, internal piston
Connecting spring device, end are provided with blanking cover, and buffer gear solves the impact from gearbox fluid, and smoothly impact is discharged.
Advance valve body 20 is be arranged in parallel with speed valve body, and the principal pressure being connected with buffer gear is provided with magnetic valve opposite side
Governor motion, as shown in Fig. 2 principal pressure adjusting means includes the pressure regulating cavity connected with cushion chamber, stick harness is provided with inside pressure regulating cavity
4, stick harness realizes the adjustment of openings of sizes with the mutually motion of the opening in side wall, realizes the adjustment to pressure, pressure regulating cavity end is set
There is the regulating bolt 13 of regulation stick harness and opened gap, preload pressure is adjusted in the front and rear of regulating bolt, so as to realize pressure regulation.
As shown in figure 1, the middle part of advance valve body 20 is provided with relief valve mechanism, safety valve is located at advance valve body side surface, valve element 10 and oil circuit
It is vertically arranged, outside is provided with fixing bolt 12, and when oil cleanliness is not up to standard runs into card valve phenomenon, safety valve can be effective
Cut-out fluid enters valve body, so as to play protection valve body
In the present embodiment, magnetic valve is two-bit triplet magnetic valve, and the valve element that pressure interface is respectively perpendicular magnetic valve is set.Work as pressure
Oil enters by oil inlet, is reduced subsequently into upper valve volume buffer oil pressure, and fluid enters principal pressure governor motion slowly, oil
Liquid be adjusted to main frame gearshift needed for pressure, Electromagnetic Control part work change pressure oil flow direction, direction valve rod be provided with advance,
Retreat, three gears of neutral, speed valve rod be provided with I II gear two gears, two two-bit triplet electromagnetic valve cores control respectively advance,
Retreating gear, two-bit triplet electromagnetic valve core control speed stage I II keep off, and corresponding supporting electric control handle completes gear switch,
So as to control the forward-reverse of loading machine to keep off, speed I II is kept off.When oil cleanliness is not up to standard runs into card valve phenomenon, effectively
Cut-out fluid enters valve body, so as to play protection valve body and Electromagnetic Control part.
Claims (5)
1. the electro-hydraulic manipulation valve of loading machine gearbox, including upper valve body, lower valve body, it is characterised in that the upper valve body is provided with one group
The advance valve body that is connected respectively with direction valve rod and valve body is retreated, advance valve body and retreating is provided with the middle part of valve body and speed valve rod company
The speed valve body connect, one end of speed valve body set the buffer gear connected with oil inlet, and the phase homonymy of advance valve body is provided with delaying
The principal pressure governor motion of punch mechanism connection, advance valve body middle part are provided with relief valve mechanism, advance valve body, retreat valve body and speed
The opposite side connection of valve body, and pressure interface is respectively equipped with, end is provided with the magnetic valve of control pressure interface.
2. the electro-hydraulic manipulation valve of loading machine gearbox according to claim 1, it is characterised in that the buffer gear includes slow
Chamber is rushed, inside is provided with the piston perpendicular with oil inlet, and piston connecting spring device, end is provided with blanking cover.
3. the electro-hydraulic manipulation valve of loading machine gearbox according to claim 2, it is characterised in that the principal pressure adjusting means
Including the pressure regulating cavity connected with cushion chamber, stick harness and opening are provided with inside pressure regulating cavity, pressure regulating cavity end is provided with regulation stick harness with opening
The regulating bolt in mouth gap.
4. the electro-hydraulic manipulation valve of loading machine gearbox according to claim 3, it is characterised in that the safety valve is positioned at advance
Valve body side, valve element are vertically arranged with oil circuit, and outside is provided with fixing bolt.
5. according to any described electro-hydraulic manipulation valves of loading machine gearbox of claim 1-3, it is characterised in that the magnetic valve is
Two-bit triplet magnetic valve, pressure interface are respectively perpendicular valve element setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486923.2A CN107882976A (en) | 2017-12-30 | 2017-12-30 | A kind of electro-hydraulic manipulation valve of loading machine gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486923.2A CN107882976A (en) | 2017-12-30 | 2017-12-30 | A kind of electro-hydraulic manipulation valve of loading machine gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107882976A true CN107882976A (en) | 2018-04-06 |
Family
ID=61770535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711486923.2A Pending CN107882976A (en) | 2017-12-30 | 2017-12-30 | A kind of electro-hydraulic manipulation valve of loading machine gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107882976A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120715A (en) * | 2019-11-19 | 2020-05-08 | 北京理工大学 | Electromagnetic valve pressure buffering device and pressure buffering method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2559818Y (en) * | 2002-08-23 | 2003-07-09 | 徐州装载机厂 | Electrohydraulic variable speed operated valve |
| CN201475090U (en) * | 2009-05-27 | 2010-05-19 | 杭州萧山叉车配件有限公司 | Main oil pressure overload protecting device of electric hydraulic control variable speed control valve |
| CN103195920A (en) * | 2013-04-08 | 2013-07-10 | 江苏柳工机械有限公司 | Power gear-shifting speed-change control system |
| CN203230840U (en) * | 2013-03-22 | 2013-10-09 | 杭州萧山叉车配件有限公司 | Speed change valve with neutral signal control device for loader |
| CN205841729U (en) * | 2016-08-01 | 2016-12-28 | 山东郯工液压科技有限公司 | A kind of loading machine gearbox electro-hydraulic manipulation valve |
| CN207673847U (en) * | 2017-12-30 | 2018-07-31 | 山东郯工液压科技有限公司 | A kind of electro-hydraulic manipulation valve of loading machine gearbox |
-
2017
- 2017-12-30 CN CN201711486923.2A patent/CN107882976A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2559818Y (en) * | 2002-08-23 | 2003-07-09 | 徐州装载机厂 | Electrohydraulic variable speed operated valve |
| CN201475090U (en) * | 2009-05-27 | 2010-05-19 | 杭州萧山叉车配件有限公司 | Main oil pressure overload protecting device of electric hydraulic control variable speed control valve |
| CN203230840U (en) * | 2013-03-22 | 2013-10-09 | 杭州萧山叉车配件有限公司 | Speed change valve with neutral signal control device for loader |
| CN103195920A (en) * | 2013-04-08 | 2013-07-10 | 江苏柳工机械有限公司 | Power gear-shifting speed-change control system |
| CN205841729U (en) * | 2016-08-01 | 2016-12-28 | 山东郯工液压科技有限公司 | A kind of loading machine gearbox electro-hydraulic manipulation valve |
| CN207673847U (en) * | 2017-12-30 | 2018-07-31 | 山东郯工液压科技有限公司 | A kind of electro-hydraulic manipulation valve of loading machine gearbox |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120715A (en) * | 2019-11-19 | 2020-05-08 | 北京理工大学 | Electromagnetic valve pressure buffering device and pressure buffering method |
| CN111120715B (en) * | 2019-11-19 | 2021-01-01 | 北京理工大学 | Electromagnetic valve pressure buffering device and pressure buffering method |
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