CN106122145B - A kind of microminiature 2D electromagnetic switch valves of spring reset - Google Patents
A kind of microminiature 2D electromagnetic switch valves of spring reset Download PDFInfo
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- CN106122145B CN106122145B CN201610570373.1A CN201610570373A CN106122145B CN 106122145 B CN106122145 B CN 106122145B CN 201610570373 A CN201610570373 A CN 201610570373A CN 106122145 B CN106122145 B CN 106122145B
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- spool
- low pressure
- driving lever
- oil
- rectangle frame
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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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- Physics & Mathematics (AREA)
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- General Engineering & Computer Science (AREA)
- Gear-Shifting Mechanisms (AREA)
- Multiple-Way Valves (AREA)
Abstract
A kind of microminiature 2D electromagnetic switch valves of spring reset, oil suction chamber are connected to oil inlet, and oil outlet is located on the movement locus of the second shoulder；The one end in channel is connected to low pressure chamber, and the other end is connected to the low pressure hole in first shoulder；Sensitive cavity can be connected to by straight trough, high-pressure trough with oil suction chamber；Sensitive cavity can be connected to by straight trough, low pressure hole, channel, low pressure chamber with oil return opening；The left end fixation of rectangle frame is set on spool, and the central shaft of rectangle frame right end sequentially passes through holder and connecting plate, and the right end of spool is airtight to pass through rectangle frame, and resetting spring is compressed between spool and spring base；The right side of spring base is pushed against on the steel ball in supporting block, the both sides of supporting block pass through rectangle frame and are fixed on holder, mechanical transmission mechanism includes directly on top upper driving lever and lower shift fork located directly below, and one end of horizon bar is arranged with driving lever resetting spring.
Description
Technical field
The present invention relates to a kind of switch valve more particularly to a kind of microminiature 2D electromagnetic switch valves of spring reset.
Background technology
In recent years, there is spool radial rotating and axial direction using the two-dimentional electro hydraulic on-off valve of servo screw mechanism principle work
Mobile double freedom, control are flexibly, precision is high, frequency response is fast, low-hysteresis, leakage rate are small, advantages of simple structure and simple, main at present
Aerospace is used in, under the military fields such as guided missile and mostly extreme environment.
But existing two-dimentional (2D) hydraulic valve is all made of the concentric structure of two-stage to ensure spool by enough drivings
Power, this also leads to the miniaturization difficult to realize of two dimension (2D) hydraulic valve of this structure.
In order to meet airborne equipment to its light weight and small requirement, Hydraulic Elements still have during miniaturization
Following problem fails to solve：1, the miniaturization of electro hydraulic on-off valve will certainly reduce the size of electromechanical converter, so as to cause drive
The problem of power/forces square deficiency；2, the miniaturization of electro hydraulic on-off valve will certainly cause valve core reseting spring to become smaller, so as to cause returning
Multiple hypodynamic problem；3, the requirement for having two-stage concentric when spool, valve body, concentric ring installation in original 2d valves, causes to process it
Required precision is high, it is difficult to the problem of processing is realized.
Invention content
In order to overcome hydraulic valve miniaturization that can cause, electromechanical converter driving force is insufficient, resetting spring restoring force is small
Problem, and can meet airborne equipment to hydraulic component strong antijamming capability, light weight, it is small, response it is fast the needs of, this hair
It is bright that a kind of airborne microminiature two dimension electro hydraulic on-off valve of spring reset is provided.
The technical scheme is that：
A kind of microminiature 2D electromagnetic switch valves of spring reset, include the valve body positioned at left side and the connection positioned at right side
Plate drives the mechanical transmission mechanism of valve core rotation to be arranged on connecting plate；Valve body and connecting plate are coaxially connected by holder, holder
One end be fixed in the groove in valve body, the other end is fixed in connecting plate；
Spool is rotatably arranged in valve body, and spool is equipped with first shoulder and the second shoulder, valve body successively from left to right
Left end cap and first shoulder by the airtight enclosure of body cavity at sensitive cavity, first shoulder and the second shoulder are airtight by body cavity
Around the annular oil suction chamber of spool, oil suction chamber is connected to enclosure cyclization with oil inlet；The valve body is equipped with oil outlet, and oil outlet is located at
On the movement locus of second shoulder；The groove of the valve body right end and the inner cavity of holder penetrate through and constitute low pressure chamber；
A pair of axisymmetric high-pressure trough and a pair of axisymmetric low pressure hole, and high pressure are had in the first shoulder of spool
Slot and low pressure hole are arranged alternately, and are equipped with channel in spool in an axial direction, and the one end in channel is connected to low pressure chamber, the other end and First
Low pressure hole connection on shoulder；The inner wall upper edge of valve body is axially arranged with a pair of axisymmetric straight trough, the outlet end of straight trough and sensitive cavity
Connection, the arrival end of straight trough is located on the movement locus of high-pressure trough outlet end and the movement locus of low pressure hole outlet end, and straight trough
Groove width it is equal with the distance between high-pressure trough and low pressure hole；Sensitive cavity can be connected to by straight trough, high-pressure trough with oil suction chamber, with to
High pressure oil is inputted in sensitive cavity；Sensitive cavity can be connected to by straight trough, low pressure hole, channel, low pressure chamber with oil return opening, with to sensitive cavity
Interior input low pressure oil；
Rectangle frame is rotationally equipped in low pressure chamber, the left end fixation of the rectangle frame is set on spool, the rectangle
The central shaft of frame right end sequentially passes through holder and connecting plate；Spring base, the right end of spool are slideably equipped in the rectangle frame
Airtight to pass through rectangle frame, the right side of spool and spring base are opposite, and resetting spring is compressed between spool and spring base；It resets
One end of spring is set on spool, and the other end is set on the pillar of spring base left end, and the right side of the spring base pushes against
On steel ball in supporting block, the both sides of the supporting block pass through rectangle frame and are fixed on holder.
The mechanical transmission mechanism includes directly on top upper driving lever and lower shift fork located directly below, upper driving lever lower half
The shifting block in portion is oval, and the first half of lower shift fork is the U-shaped fork of opening upwards, and the shifting block of upper driving lever is plugged in the U of lower shift fork
In shape fork, the shaft of rotating machinery is fixedly connected with upper driving lever, to drive upper driving lever to drive lower shift fork rotation, and the bottom of lower shift fork
Portion is fixedly connected with the central shaft of rectangle frame right end, is rotated synchronously with band movable valve plug；It is slidably disposed at the top of upper driving lever
On horizon bar, and one end of horizon bar is arranged with upper driving lever tilting the upper driving lever resetting spring being pushed against in lower shift fork, upper to dial
The inclination of upper driving lever is pushed against zero-bit state by bar resetting spring.
Further, the rotary magnet is arranged in the top of valve body, and is furnished with protective cover.
Further, the upper driving lever is clamped in by the first trip bolt on the output shaft of rotary magnet, described to set aside
Fork is clamped in by the second trip bolt on the central shaft of rectangle frame.
The axial direction of the present invention refers to the direction where the central shaft of spool.
For the characteristic for making the present invention have small, light weight, response fast, in addition to electromechanical converter to be ensured has
Outside enough driving moments, transmission mechanism is also required to play the role of amplifying driving moment.The mechanical transmission mechanism of the present invention can make
Infinitely great driving moment is obtained when spool is started to work, therewith, the transmission ratio between upper driving lever and lower shift fork is by infinitely great fast
Speed reduces, and corresponding spool rotating speed is quickly increased by infinitely small, therefore can be carried for spool when spool has just started rotation
For infinitely great driving moment to overcome hydraulic card clamping force, and back valve core quick rotation is to target location.This mechanical transmission mechanism
It may be equally applied to the electro-hydraulic high-speed switch valves of 3-position 4-way 2D.
1) size that electromechanical converter will certainly be reduced for the miniaturization of electro hydraulic on-off valve, so as to cause driving force/
The problem of torque deficiency；
The present invention uses variable ratio transmission mechanism, keeps initial drive force square infinitely great, to overcome spool just to start to rotate
When existing hydraulic card clamping force.
2) valve core reseting spring will certainly be caused to become smaller the miniaturization of electro hydraulic on-off valve, so as to cause restoring force deficiency
The problem of；
The present invention makes spring not act directly on spool by rectangular frame structure, but acts on rectangle frame, then leads to
Rectangle frame is crossed to be connected with spool to transmit power and movement.Rectangular frame structure considerably increases the installation space of spring, reduces pair
The limitation of spring sizes so that spring can be done greatly to increase spring force.
3) the two-stage concentric problem occurred when being installed for spool, valve body, concentric ring.
The present invention does not use concentric ring mechanism to go structure low pressure chamber, but holder is used to be constituted into low pressure with spool cooperation
Chamber, holder only coordinate with spool, and required precision is relatively low, and fabrication and installation are more convenient.
The beneficial effects of the invention are as follows：
1, small, light weight is simple in structure；
2, strong antijamming capability adapts to the complex working conditions such as aerospace；
3, using the mechanical transmission mechanism of variable ratio, effectively amplify the driving moment of spool, initiating at the beginning of to overcome spool
Hydraulic card clamping force when making, while reducing the input torque requirement to electromechanical converter；
4, it is slided using hydraulic pressure power drive spool, driving force is big, and frequency response is high；
5, the concentric structure of two-stage is not needed, eliminates in previous 2D valves and is required and increased processing with one heart to meet two-stage
Difficulty；
6, contamination resistance is strong, low to oil filtrating required precision.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is mechanical transmission mechanism structural schematic diagram.
Fig. 3 is valve body sectional view.
Fig. 4 is the partial sectional view of the present invention.
Fig. 5 is sectional view along A-A in Fig. 4.
Fig. 6 is oil inlet, oil outlet and oil return opening position view on valve body.
The positions Fig. 7 spool cross-sectional view
Specific implementation mode
As shown, a kind of microminiature 2D electromagnetic switch valves of spring reset, include positioned at left side valve body 20 and be located at
The connecting plate 14 on right side drives the mechanical transmission mechanism of valve core rotation to be arranged on connecting plate 14；Valve body 20 and connecting plate 14 are logical
Cross that holder 15 is coaxially connected, one end of holder 15 is fixed in the groove in valve body 20, and the other end is fixed in connecting plate 14；
Spool 21 is rotatably arranged in valve body 20, and spool 21 is equipped with first shoulder 211 and second successively from left to right
Shoulder 212, the left end cap 22 and first shoulder 211 of valve body 20 are by the airtight enclosure of body cavity at sensitive cavity g, first shoulder 211
With the second shoulder 212 by the airtight enclosure cyclization of body cavity around the annular oil suction chamber of spool 21, oil suction chamber c is connected to oil inlet P；
The valve body is equipped with oil outlet A, and oil outlet A is located on the movement locus of the second shoulder 212；The groove of the valve body right end and
The inner cavity of holder 15 penetrates through and constitutes low pressure chamber m；
A pair of axisymmetric high-pressure trough y and a pair of axisymmetric low pressure hole a are had in the first shoulder 211 of spool,
And high-pressure trough y and low pressure hole a are arranged alternately, and are equipped with channel b in spool 21 in an axial direction, one end of channel b is connected to low pressure chamber m,
The other end is connected to the low pressure hole a in first shoulder 211；The inner wall upper edge of valve body 20 is axially arranged with a pair of axisymmetric straight trough f,
The outlet end of straight trough f is connected to sensitive cavity g, and the arrival end of straight trough f is located at the movement locus and low pressure hole a of the outlet ends high-pressure trough y
On the movement locus of outlet end, and the groove width of straight trough f is equal with the distance between high-pressure trough y and low pressure hole a；Sensitive cavity g can lead to
Cross straight trough f, high-pressure trough y is connected to oil suction chamber c, to input high pressure oil into sensitive cavity g；Sensitive cavity g can pass through straight trough f, low pressure
Hole a, channel b, low pressure chamber m are connected to oil return inlet T, to input low pressure oil into sensitive cavity g；
Rectangle frame 10 is rotationally equipped in low pressure chamber, the left end fixation of the rectangle frame 10 is set on spool 21, institute
The central shaft for stating 10 right end of rectangle frame sequentially passes through holder 15 and connecting plate 14；Spring is slideably equipped in the rectangle frame 10
Seat 18, the right end of spool 21 is airtight to pass through rectangle frame 10, and the right side of spool 21 and spring base 18 are opposite, and spool 21 and spring
It is compressed with resetting spring 19 between seat 18；One end of resetting spring 19 is set on spool 21, and the other end is set in spring base 18
On the pillar of left end, the right side of the spring base 18 is pushed against on the steel ball in supporting block, and the both sides of the supporting block pass through
Rectangle frame 10 is simultaneously fixed on holder 15.
The mechanical transmission mechanism includes directly on top upper driving lever 7 and lower shift fork 8 located directly below, upper driving lever 7
The shifting block of lower half is oval, and the first half of lower shift fork 8 is the U-shaped fork of opening upwards, and the shifting block of upper driving lever 7, which is plugged in, to be set aside
In the U-shaped fork of fork 8, the shaft of rotating machinery is fixedly connected with upper driving lever 7, to drive upper driving lever 7 that lower shift fork 8 is driven to rotate, and
The bottom of lower shift fork 8 is fixedly connected with the central shaft of 10 right end of rectangle frame, is rotated synchronously with band movable valve plug 21；The top of upper driving lever 7
Portion is slidably disposed on horizon bar 2, and one end of horizon bar 2 is arranged with and the inclination of upper driving lever 7 is pushed against in lower shift fork 8
The inclination of upper driving lever 7 is pushed against zero-bit state by upper driving lever resetting spring 1, upper driving lever resetting spring 1.
The supporting block 16 is equipped with steel ball 17 so that spring base 18 and supporting block 16 are point contact, reduce spring base
Frictional resistance when 18 rotation between supporting block 16, improves response speed.
The rotary magnet is arranged in the top of valve body 20, and is furnished with protective cover.
The upper driving lever 7 is clamped in by the first trip bolt 5 on the output shaft of rotary magnet 6, and the lower shift fork 8 is logical
The second trip bolt 9 is crossed to be clamped on the central shaft of rectangle frame 10.
Valve body 20 is connected with connecting plate 14 by screw 11, the central shaft and rotating electromagnetic that transmission mechanism passes through rectangle frame 15
The projecting shaft of iron 6 is mounted on 14 right side of connecting plate；Rotary magnet 6 is fastened on connecting plate top by screw 13.
Oil inlet P, oil outlet A, oil return inlet T are offered on valve body, valve body 20 is connected to by oil inlet P with high-pressure pump, high
Press pump is that valve body 20 provides high pressure oil；Valve body 20 is connected to by oil outlet A with hydraulic cylinder, to provide high hydraulic pressure to hydraulic cylinder；Valve
Body 20 is connected to by oil return inlet T with fuel tank, and oil return box is that valve body 20 provides low pressure oil.
The rotating machinery is rotary magnet 6, and rotary magnet 6 is connected with controller.Controller is to rotating electromagnetic
6 sending action order of iron.Electromechanical converter of the rotary magnet 6 as the present invention, is located at the top of valve body 20, and passes through the
One screw 13 is connected with connecting plate 14, and protective cover 23 is connected by the second screw 12 with connecting plate 14, the box that the present invention is arranged
Lid is fixed on by third screw 11 on connecting plate 14, and horizon bar holder 2 is fixed on by third screw 4 on connecting plate 14, left
End cap 22 is fixed on by the 4th screw on valve body 20.
Holder 15 and connecting plate 14 and valve body 20 are connected, and rectangle frame 10 is welded on spool 21, rectangle frame 10 and valve body it
Between by the first sealing ring seal, between the central shaft and connecting plate of rectangle frame 10 pass through the second sealing ring seal.On holder 15
Be provided with mounting groove be used for installing with bracer 16, and limit supporting block 16 and move right, the general of supporting block 16 contact with spring base 18
In pressure transmission from spring 19 to holder 15,18 left side of spring base is equipped with resetting spring 19, to prevent from not leading in valve body
Rectangle frame 10, supporting block 16, spring base 18 and spool 21 are in 20 inside moving of valve body when oily, and are when logical oil is not powered on
Spool 21 provides reset drives power.
Spool 21, valve body 20 and the cooperation of left end cap 22 constitute the cross section of sensitive cavity g, high-pressure trough y and low pressure hole a in circle
Shape, to reduce processing technology difficulty.High-pressure trough y and low pressure hole a is located at the both sides of straight trough f, and high-pressure trough and low pressure hole a it
Between distance it is equal with the width of straight trough f, one end of straight trough f is communicated with sensitive cavity g, the other end and high-pressure trough or low pressure hole a phases
Connection, straight trough f is connected to high-pressure trough or is connected to the rotational angle depending on spool with low pressure hole a, and controls the pressure in sensitive cavity g
Power.One end of spool 21 is in sensitive cavity g, and on being connected in rectangle frame 10, rectangle frame is held out against the other end by resetting spring 19, quick
Sense chamber g and resetting spring 19 are the Dao Kong mechanisms for realizing switch valve spool corner and axial straight-line displacement conversion.
When electric signal does not access, the 19 preloading compression deformation of resetting spring on 21 right side of spool provides one for spool 21
A driving force to the left；In the sensitive cavity g in 21 left side of spool, the straight trough f being connected to sensitive cavity g is only connected to low pressure hole a, oil
Low pressure oil in case is passed through through oil return inlet T, low pressure chamber m, channel b, low pressure hole a and straight trough f in sensitive cavity g, is low in sensitive cavity g
Pressure, spool 21 are moved to the left under the action of the spring force of right side, and the second shoulder 212 slightly moves to left, and the second shoulder 212 seals up out
Hydraulic fluid port A is close to the left side of oil suction chamber, i.e. oil outlet A is blocked with oil inlet P, while oil outlet A is connected to oil return inlet T, the present invention
Positioned at zero-bit state, i.e., state as shown in Figure 3, at this point, oil outlet A is connected to oil return inlet T at this time, the low pressure oil in hydraulic cylinder
Fuel tank is flowed back to by oil outlet A, oil return inlet T.
When energization, the rotation of rotary magnet 6 (rotation amplitude of rotary magnet 6 is 21 °), and drove upper 7 inverse time of driving lever
Needle rotates, then upper driving lever 7 drives lower shift fork 8, rectangle frame 10, spool 21 to rotate clockwise according to this, leads to straight trough f and low pressure hole a
It is staggered, straight trough f is only connected to high-pressure trough, and high pressure oil flows into sensitive cavity g by oil inlet P, high pressure chest c, high-pressure trough y, straight trough f
It is interior, high pressure oil is full of in sensitive cavity g, this high pressure oil is more than the normal pressure of spool 21 elastic force of resetting spring 19, spool at this time
21 slide to the right under the action of this high pressure oil normal pressure is with 19 resultant force of resetting spring, and the second shoulder 212 slightly moves to right, oil outlet
It being lost on the left of A and blocks and be connected to oil suction chamber, i.e., oil inlet P is connected to oil outlet A, and oil outlet A is disconnected with oil return inlet T, into
High pressure oil in oil pocket flows into hydraulic cylinder or other sub- hydraulic systems by oil outlet A.
Conversely, when the present invention is by being energized to power-off, the above change procedure is just the opposite.
Therefore, the present invention is the two-stage high-speed switch valve that spool has double freedom of motion, and the present invention utilizes machine driving
Mechanism driving spool rotates, and realizes pilot valve function, spool is pushed under the action of oil liquid pressure and resetting spring elastic force
Axial movement, realizes the high-speed opening and closing characteristic of valve port.
But frictional force, hydraulic power, greasy dirt and spool valve body machining accuracy etc. can all generate larger in the moment of valve core rotation
Resistance, be susceptible to hydraulic pressure " clamping stagnation " phenomenon, in order to make the present invention do not occur hydraulic pressure " clamping stagnation " phenomenon, transmission mechanism is starting
Moment must have larger torque.
Torque-variable may be implemented in the transmission mechanism of the present invention, and the lower half of upper driving lever 7 is oval, becomes transmission to realize
Than, it since the rotation amplitude of rotary magnet 6 is 21 °, assembles for convenience, and realize the symmetric design of upper driving lever 7, it is upper to dial
10.5 ° of driving lever 7 and 8 rotation center line of lower shift fork in initial makeup location (i.e. zero-bit state) deviation of bar 7, upper driving lever 7 with
It is engaged for line between lower shift fork 8, and upper driving lever 7 intersects at two contact points up and down respectively with lower shift fork 8.At this point, upper contact
Point normal just past upper driving lever 7 rotation center, according to " Kennedy-Aronhold the-orem ", the relative instantaneous center weight of upper driving lever 7 and lower shift fork 8
It closes, the instantaneous transmission ratio of transmission mechanism is infinity, and lower shift fork 8 is equivalent to a shock response to the response of upper driving lever 7, is exported
Torque is very big, it is sufficient to overcome spool " clamping stagnation " phenomenon.
Continue to move with upper driving lever 7, relative instantaneous center is close to the center of rotation of lower shift fork 8.By instantaneous theorem it is found that
The transmission ratio of upper driving lever 7 and lower shift fork 8 is inverse ratio of the respective center of rotation to instantaneous distance, therefore transmission ratio reduces therewith, but
Rotating torque needed for being sufficient for after spool 21 starts.
Compared with existing stable drive ratio transmission mechanism, transmission mechanism of the invention will initially generate infinity in movement
Torque, to overcome the electro-hydraulic high-speed switch valves of 2D easily by the problems such as frictional force, hydraulic power, greasy dirt and spool valve body machining accuracy pairs
Hydraulic pressure " clamping stagnation " phenomenon that spool generates.
So that spool 21 remains to be in zero-bit, in water in the case that controller to ensure in switch valve is not powered on or fails
Upper shift fork resetting spring 1 is installed, upper shift fork resetting spring 1, horizon bar 2 constitute the position-limit mechanism of upper shift fork on flat bar 2.Upper shift fork
It can rotate counterclockwise upon actuation, and oppress upper shift fork resetting spring 1, when upper shift fork turns to maximum position and stops operating
Afterwards, upper shift fork and resetting spring 1 are in stationary state, and when controller powers off, upper shift fork resetting spring 1 drives upper shift fork 7
It resets.
In order to improve the stability that the present invention works, balance inertial force need to be by the weight of upper driving lever 7 and the first trip bolt 5
The heart overlaps with the center of the shaft of rotary magnet 6, the weight of the central shaft of rectangle frame 10 and lower shift fork 8 and the second trip bolt 9
The heart overlaps.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes art technology
Personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (3)
- Include the valve body positioned at left side and the connecting plate positioned at right side 1. a kind of microminiature 2D electromagnetic switch valves of spring reset, The mechanical transmission mechanism of valve core rotation is driven to be arranged on connecting plate；Valve body and connecting plate are coaxially connected by holder, holder One end is fixed in the groove in valve body, and the other end is fixed in connecting plate；It is characterized in that：Spool is rotatably arranged in valve body, and spool is equipped with first shoulder and the second shoulder, a left side for valve body successively from left to right End cap and first shoulder are by the airtight enclosure of body cavity at sensitive cavity, first shoulder and the second shoulder by the airtight enclosure of body cavity Around the annular oil suction chamber of spool, oil suction chamber is connected to cyclization with oil inlet；The valve body is equipped with oil outlet, and oil outlet is located at second On the movement locus of shoulder；The groove of the valve body right end and the inner cavity of holder penetrate through and constitute low pressure chamber；Have a pair of axisymmetric high-pressure trough and a pair of axisymmetric low pressure hole in the first shoulder of spool, and high-pressure trough and Low pressure hole is arranged alternately, and is equipped with channel in spool in an axial direction, and the one end in channel is connected to low pressure chamber, on the other end and first shoulder Low pressure hole connection；The inner wall upper edge of valve body is axially arranged with a pair of axisymmetric straight trough, and the outlet end of straight trough is connected to sensitive cavity, The arrival end of straight trough is located on the movement locus of high-pressure trough outlet end and the movement locus of low pressure hole outlet end, and the groove width of straight trough It is equal with the distance between high-pressure trough and low pressure hole；Sensitive cavity can be connected to by straight trough, high-pressure trough with oil suction chamber, with to sensitive cavity Interior input high pressure oil；Sensitive cavity can be connected to by straight trough, low pressure hole, channel, low pressure chamber with oil return opening, to be inputted into sensitive cavity Low pressure oil；Rectangle frame is rotationally equipped in low pressure chamber, the left end fixation of the rectangle frame is set on spool, and the rectangle frame is right The central shaft at end sequentially passes through holder and connecting plate；Spring base is slideably equipped in the rectangle frame, the right end of spool is airtight Across rectangle frame, the right side of spool and spring base are opposite, and resetting spring is compressed between spool and spring base；Resetting spring One end be set on spool, the other end is set on the pillar of spring base left end, and the right side of the spring base is pushed against branch On steel ball on bracer, the both sides of the supporting block pass through rectangle frame and are fixed on holder；The mechanical transmission mechanism includes directly on top upper driving lever and lower shift fork located directly below, upper driving lever lower half Shifting block is oval, and the first half of lower shift fork is the U-shaped fork of opening upwards, and the shifting block of upper driving lever is plugged in the U-shaped fork of lower shift fork Interior, the shaft of rotating machinery is fixedly connected with upper driving lever, to drive upper driving lever to drive lower shift fork rotation, and the bottom of lower shift fork with The central shaft of rectangle frame right end is fixedly connected, and is rotated synchronously with band movable valve plug；It is slidably disposed in level at the top of upper driving lever On bar, and one end of horizon bar is arranged with upper driving lever tilting the upper driving lever resetting spring being pushed against in lower shift fork, and upper driving lever is multiple The inclination of upper driving lever is pushed against zero-bit state by position spring.
- 2. a kind of microminiature 2D electromagnetic switch valves of spring reset as described in claim 1, it is characterised in that：Rotary magnet It is arranged in the top of valve body, and is furnished with protective cover.
- 3. a kind of microminiature 2D electromagnetic switch valves of spring reset as claimed in claim 2, it is characterised in that：The upper driving lever It is clamped on the output shaft of rotary magnet by the first trip bolt, the lower shift fork is clamped in square by the second trip bolt On the central shaft of shape frame.
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| CN201610570373.1A CN106122145B (en) | 2016-07-19 | 2016-07-19 | A kind of microminiature 2D electromagnetic switch valves of spring reset |
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| CN201610570373.1A CN106122145B (en) | 2016-07-19 | 2016-07-19 | A kind of microminiature 2D electromagnetic switch valves of spring reset |
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|---|---|---|---|---|
| CN101737371A (en) * | 2010-02-09 | 2010-06-16 | 浙江工业大学 | Zero maintaining mechanism of 2D digital servo valve |
| CN102168700A (en) * | 2011-05-06 | 2011-08-31 | 浙江工业大学 | Permanent magnet zero-position retaining mechanism of two-dimensional digital servo valve |
| EP2824335A1 (en) * | 2013-05-29 | 2015-01-14 | Bomar S.A. | Multifunctional modular hydraulic valve block assembly |
| CN206092556U (en) * | 2016-07-19 | 2017-04-12 | 浙江工业大学 | Spring homing's microminiature 2D electromagnetic switch valve |
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