CN104728204B - Distributor for tractor - Google Patents
Distributor for tractor Download PDFInfo
- Publication number
- CN104728204B CN104728204B CN201510140578.1A CN201510140578A CN104728204B CN 104728204 B CN104728204 B CN 104728204B CN 201510140578 A CN201510140578 A CN 201510140578A CN 104728204 B CN104728204 B CN 104728204B
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- rod
- guide
- guide 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.)
- Active
Links
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
- F15B13/022—Flow-dividers; Priority valves
Abstract
The invention discloses a distributor for a tractor. The distributor comprises a valve, a front cover and a rear cover. A valve rod is arranged in the valve, and the two ends of the valve rod stretch into the front cover and the rear cover respectively. A handle is arranged on the front cover, a through hole penetrating through the rear cover is formed in the rear cover, and a balance guide rod is arranged in the through hole. A radial hole penetrating through the valve rod in the radial direction of the valve rod is formed in the circumferential face of the valve rod, and a small steel ball is arranged in the radial hole. A positioning guide base is arranged in an inner cavity of the valve rod, a guide rod is arranged on a guide rod base in the positioning guide base, and a cone valve element is arranged on the right side of the guide rod base. A special-shaped sealing ring is arranged in a sealing groove in the rear cover. A second-level guiding body is arranged on the peripheral face of a middle connecting body of a one-way valve element. The distributor has the advantages that the problem of automatic valve rod reversing in the back pressure process can be solved, the automatic valve rod reset function is achieved, resetting is reliable, the sealing effect of the rear cover is good, staining of dust does not exist, the service life of a one-way valve is long, and working reliability is high.
Description
Technical field
The present invention relates to a kind of allotter, especially a kind of allotter for tractor.
Background technology
Hydraulic Elements are big with its power, and mounting arrangements are easy, and it is easy to controlled, easy to operate comfortable, fault rate is low, are easy to tie up
The advantages of shield, it is very suitable for that configuration is changeable, the application of the severe agricultural machinery of working condition.In decades, hydraulic technique
Not only in agricultural machinery, lathe, engineering machinery, building machinery, space flight and aviation equipment etc. is more and more applied, and defines
Huge market.
Tendency of Agricultural Machinery in China is to use Hydraulic Elements, and at most, kind is minimum, and price is minimum, is therefore most to develop for quantity
The industry field of potentiality.It is also far from enough that a wherein important factor is that hydraulic technique is applied on agricultural machinery.This is due to me
State's peasant's purchasing power is low, limits application on agricultural machinery for the hydraulic technique.Agri-machinery quality class using hydraulic technique improves,
Also up, peasant is beyond affordability, and such main computer boxes quality and technology content are difficult to be greatly improved for price.Therefore, main frame
Factory has to reduce configuration, and changing configuration makes main computer boxes quality and technology content all decline exchanging market for.China at present
The Hydraulic Elements of the hydraulic system domestic production of less than 180 horsepowers tractors, substantially meet the market demand.But quality is uneven
Weighing apparatus, service life is short, and particularly hydraulic lock and jump position faults frequent occur.
As Figure 10 and Figure 11, in prior art, a seal face with bonnet is usually set between bonnet and valve body
The asbestos pad 27 of same shape and size, pads between bonnet and valve body, to realize the sealing between bonnet and valve body.However,
Asbestos are to have been accepted as a kind of carcinogen in the world, there are the healthy problem of harm staff using asbestos pad 27.
Asbestos pad has the characteristics that immersion oil and permeability.After use after a while, asbestos pad 27 can be impregnated with by fluid, becomes easily infected by
Dust.For a long time after dust contamination, asbestos pad 27 sealing station is just messy, have impact on machine overall appearance attractive in appearance
Property.After the long-time immersion oil of asbestos pad 27, the sealing effectiveness of asbestos pad 27 will decline, and is accomplished by changing once about general half a year
Asbestos pad, the good sealing effectiveness of guarantee.
As Figure 10, the cavity of bonnet is provided with spring base, back-moving spring, the left end of valve rod stretches to the cavity of bonnet
Interior.Due to being sealing between valve rod and valve body, the cavity of bonnet is connected with oil back chamber.As fruit oil back pressure, because valve rod is left
Side is subject to oil pressure area to be less than the area that right side is subject to oil pressure, there is the difference in areas of a compression area, acts on described in bonnet
The power to the left of valve rod is less than power to the right, and now hydraulic oil will produce a thrust to the right to valve rod, if back pressure is relatively
Greatly, then valve rod can be led to move right, cause valve rod automatic reverse, be prone to accidents.
As Figure 10, and, the allotter of prior art, it is necessary to manually to pull described operation handle when needing to reset
Just enable the reset of valve rod, there is no auto-reset function, controllability is poor.
As Figure 10 and Figure 12, in existing allotter, it is provided with check valve, the valve element of this check valve is installed in allotter
During check valve intracavity, tail end is provided with spring, and lower end is provided with steel ball, and valve element is located between steel ball and spring, steel ball and valve rod
Abut against and controlled by stem movement the lifting of steel ball.When sealed, the tapered portion of tail end bottom of check valve and valve inwall
Abut against realization sealing, the front end guide way of check valve realizes sealing with the sealing ring on valve pocket inwall.When valve rod moves right
During to working position, steel ball moves up, and the valve element of check valve rises, between the tapered portion of tail end bottom of check valve and valve
Sealing releases, and the first oil duct and the second oil duct are connected, and the front end guide way of lower end and valve still keep directly contact and close
Envelope.But in addition to front end guide way and valve directly contact, the middle connection body of upper end and tail end all not with other positions of valve
Contact.Now, because the valve element of check valve only has lower end to fix, when hydraulic oil has pressure oscillation, the top of valve element can be with
The fluctuation of oil pressure and double swerve.Rocking with valve element, the friction between front end guide way and unidirectional valve pocket, sealing gasket adds
Play, can lead to the front end guide way periphery abrasion of the valve element of check valve, sealing member crushes easily, and reduces the use of check valve
In the life-span, also result in seal failure and cause and oil leakage phenomenon occurs, thus reducing the control accuracy of valve.
Content of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, providing a kind of distribution for tractor
Device, easily pollute and need to often change to solve asbestos pad, valve rod back pressure automatic reverse, can only hand-reset and check valve valve element
Problem easy to wear.
The present invention is to solve technical problem to employ the following technical solutions.
For the allotter of tractor, it is structurally characterized in that, including valve body 1, protecgulum 2 and bonnet 3；Set in described valve body 1
Be equipped with valve rod 4, the first end of described valve rod 4 is inserted within described bonnet 3, the second end of described valve rod 4 be inserted into described before
Within lid 2；It is provided with handle 5 on described protecgulum 2；One end of described handle 5 be inserted within described protecgulum 2 and with described valve rod
4 phase clampings are to pull valve rod 4 along the axial linear movement of valve rod 4 by pulling described handle 5；The other end of described handle 5
Pull in order to manual outside stretching out in described protecgulum 2；
The through hole 301 penetrating described bonnet 3, institute is offered on the end face of the one end away from described valve body 1 of described bonnet 3
State and in through hole 301, be provided with a balance guide rod 6；The first end of described balance guide rod 6 stretches out in outside described bonnet 3, described
Second end of balance guide rod 6 is inserted within described bonnet 3 and is flexibly connected with the first end of described valve rod 4；Described balance is led
Bar 6 being capable of axially moving along a straight line along described valve rod 4 in described through hole 301.
The construction featuress of the allotter for tractor of the present invention lie also in:
Second end of described balance guide rod 6 is provided with a boss 601, and the left part of described valve rod 4 is provided with an end
Portion's screw 7, the right-hand member of described end screw 7 is inserted in the stem cavity 401 of the left part of described valve rod 4；Described end spiral shell
The left part of nail 7 is provided with one and described boss 601 shape identical groove, and described boss 601 is connected within described groove,
Make to be flexibly connected between described balance guide rod 6 and described valve rod 4.
In described bonnet 3, the first spring base 8, the second bullet are arranged with the outer peripheral face of described valve rod 4 and end screw 7
Spring abutment 9, back-moving spring 10 and positioning sleeve 11, described first spring base 8, second spring seat 9 and positioning sleeve 11 are from left to right successively
Setting, described back-moving spring 10 is arranged between described first spring base 8 and second spring seat 9, the right-hand member of described positioning sleeve 11
Portion is abutted against with described valve body 1, and described second spring seat 9 is abutted against with the left part of positioning sleeve 11, and valve rod 4 can be described fixed
Linear motion in position set 11 is thus compressing or loosening described back-moving spring 10；It is arranged at along institute inside described end screw 7
State the cavity of end screw 7 described in the axial penetration of end screw 7, set successively from left to right in the cavity of described end screw 7
Put lock-screw 12, pressure regulating screw 13, locking spring 14 and localization handspike 15；On the outer peripheral face of described localization handspike 15 left part
It is arranged with locking spring 14, the right-hand member of described localization handspike 15 is inserted in described stem cavity 401, and described localization handspike 15
Right part outer peripheral face on be provided with type conical bench；
Radial hole along described valve rod 4 valve rod 4 described in radial penetration is provided with the side face of described valve rod 4, described
Radial direction in the hole is provided with small ball 16, and described small ball 16 is abutted against with the type conical bench of the right part of described localization handspike 15；
It is provided with a positioning guide bracket 17 in described stem cavity, described positioning guide bracket 17 is located at the left side of described localization handspike 15,
It is provided with a guide rod seat 18, the left part of described guide rod seat 18 is fixedly installed one and leads in the inner chamber of described positioning guide bracket 17
Bar 19, described guide rod 19 is abutted against with the right part of described pressure regulating screw 13 after extending through described localization handspike 15 to the left；Institute
The right-hand member stating guide rod seat 18 is provided with pressure spring 20, and the right side of described guide rod seat 18 is additionally provided with a poppet valve core 21, described
Pressure spring 20 is located between described guide rod seat 18 and described poppet valve core 21；The right part of described poppet valve core 21 can be inserted in along
In the elongated hole 22 that described valve rod 4 direction extends and described elongated hole 22 can be blocked, with control described stem cavity 401 with described
Connection between elongated hole 22 and disconnection；The right-hand member of described elongated hole 22 is connected with the first oil duct 101 of valve body 1.
One seal groove is provided with the end face being matched with described valve body 1 on described bonnet 3, sets within described seal groove
It is equipped with a special-shaped seal ring 23.
Unidirectional valve pocket 103 is provided with described valve body 1, be provided with described unidirectional valve pocket 103 check valve back-moving spring 24,
Nonreturn valve core 25 and check valve steel ball 26；
Described nonreturn valve core 25 includes front end guide way 2501, middle connection body 2502 and tail end 2503；At described middle part
One two grades of guide way 2504 is provided with the outer peripheral face of connector 2502, described two grades of guide waies 2504 are provided with along institute
State the compensating groove 2505 axially penetrating through described two grades of guide waies 2504 of nonreturn valve core 25.
Compared with the prior art, the present invention has the beneficial effect that:
The allotter for tractor of the present invention, including valve body, protecgulum and bonnet；It is provided with valve rod, valve rod in valve body
First end be inserted within bonnet, the second end of valve rod is inserted within protecgulum；Handle is provided with protecgulum；One end of handle
It is inserted within protecgulum and with valve rod phase clamping to pull valve rod along the axial linear movement of valve rod by pulling handle；Handle
The other end stretch out in and pull in order to manual outside protecgulum；Offer on the end face away from one end of valve body of bonnet after penetrating
The through hole of lid, is provided with a balance guide rod in through hole；Balance guide rod being capable of axially moving along a straight line along valve rod in through hole.
The radial hole of the radial penetration valve rod along valve rod is provided with the side face of valve rod, radial direction in the hole is provided with little steel
Ball, small ball is abutted against with the type conical bench of the right part of localization handspike；It is provided with a positioning guide bracket in stem cavity, fixed
Position guide bracket is located at the left side of localization handspike, is provided with a guide rod seat, the left part of guide rod seat is fixed in the inner chamber of positioning guide bracket
It is provided with a guide rod, guide rod is abutted against with the right part of pressure regulating screw after extending through localization handspike to the left；The right side of guide rod seat
End is provided with pressure spring, and the right side of guide rod seat is additionally provided with a poppet valve core.
Cover afterwards and a seal groove is provided with the end face matching with valve body, within seal groove, be provided with profiled seal
Circle.
One two grades of guide way is provided with the outer peripheral face of the middle connection body of nonreturn valve core.
The allotter for tractor of the present invention, has following technological merit.
(1) when there is back pressure, due to be provided with balance guide rod so that for valve rod to the left and to the right by oil pressure area
Identical, therefore valve rod is in stress balance state, so solve in prior art left and right compression area not etc. not leading to valve rod to be subject to
Lead to auto reversive problem to thrust to the right.
(2) due to employing the automatic of the assembly compositions such as positioning sleeve, locking spring, positioning guide bracket, localization handspike, poppet valve core
Position reset device, so that the allotter of the present invention passes through to control the pressure of oil suction chamber, realizes the auto-reset function of valve rod.
(3) setting phase in profiled seal groove, profiled seal groove is arranged on the mating surface matching between bonnet and valve body
The special-shaped seal ring answered.Due to using sealing by the way of setting sealing ring within seal groove, being radial seal mode, sealing effect
Fruit is more preferably.
(4) due to two grades of guide waies being provided with the middle connection body of nonreturn valve core, it is check valve high-pressure opening state
Provide stable guidance quality, it is to avoid valve element lower end under the fluctuation of oil pressure and valve pocket between abrasion it is thus also avoided that sealing is lost
Effect and cause and oil leakage phenomenon occur, improve the service life of check valve and functional reliability so that check valve have good
High stability.
The allotter for tractor of the present invention, has and can ensure that valve element will not rock in pressure fluctuation, extend list
To valve service life, improve valve functional reliability the advantages of.
Brief description
Fig. 1 is the front view of the allotter for tractor of the present invention.
Fig. 2 is the left view of the allotter for tractor of the present invention.
Fig. 3 is the right view of the allotter for tractor of the present invention.
Fig. 4 is the upward view of the allotter for tractor of the present invention.
Fig. 5 is the a-a sectional view (allotter is in middle position state) of Fig. 3.
Fig. 6 is the a-a sectional view (allotter is in running order) of Fig. 3.
Fig. 7 is the front view of the valve element of the check valve of the allotter for tractor of the present invention.
Fig. 8 is the front view of the special-shaped seal ring of the allotter for tractor of the present invention.
Fig. 9 is the left view of the special-shaped seal ring of the allotter for tractor of the present invention.
Figure 10 is the sectional view of the allotter for tractor of prior art.
Figure 11 is the front view of the asbestos pad of the allotter for tractor of prior art.
Figure 12 is the front view of the valve element of the check valve of the allotter for tractor of prior art.
Label in accompanying drawing 1～accompanying drawing 12: 1 valve body, 101 first oil ducts, 102 second oil ducts, 103 unidirectional valve pockets, 104 oil-feeds
Chamber, 2 protecgulums, 3 bonnets, 301 through holes, 4 valve rods, 401 stem cavity, 5 handles, 6 balance guide rods, 601 boss, 7 end screw, 8
First spring base, 9 second spring seats, 10 back-moving springs, 11 positioning sleeves, 12 lock-screws, 13 pressure regulating screws, 14 locking springs,
15 localization handspikes, 16 small balls, 17 positioning guide brackets, 18 guide rod seats, 19 guide rods, 20 pressure springs, 21 poppet valve cores, 22 elongated hole,
23 special-shaped seal rings, 24 check valve back-moving springs, 25 nonreturn valve cores, 2501 front end guide waies, 2502 middle connection body, 2503 tails
End, 2,504 2 grades of guide waies, 2505 compensating grooves, 2506 tapered portion, 26 check valve steel balls, 27 asbestos pads.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment
Referring to accompanying drawing 1-9, the allotter for tractor of the present invention, including valve body 1, protecgulum 2 and bonnet 3；Described valve
It is provided with valve rod 4, the first end of described valve rod 4 is inserted within described bonnet 3, and the second end of described valve rod 4 is inserted in body 1
Within described protecgulum 2；It is provided with handle 5 on described protecgulum 2；One end of described handle 5 be inserted within described protecgulum 2 and with institute
State valve rod 4 phase clamping to pull valve rod 4 along the axial linear movement of valve rod 4 by pulling described handle 5；Described handle 5
The other end is pulled in order to manual outside stretching out in described protecgulum 2；
The through hole 301 penetrating described bonnet 3, institute is offered on the end face of the one end away from described valve body 1 of described bonnet 3
State and in through hole 301, be provided with a balance guide rod 6；The first end of described balance guide rod 6 stretches out in outside described bonnet 3, described
Second end of balance guide rod 6 is inserted within described bonnet 3 and is flexibly connected with the first end of described valve rod 4；Described balance is led
Bar 6 being capable of axially moving along a straight line along described valve rod 4 in described through hole 301.
The allotter for tractor of the present invention, due to being provided with balance guide rod, and is balanced guide rod and is connected with valve rod and adopts
With being flexibly connected, prevent the generation of card valve because coaxiality error leads to or leakage of oil problem.When there is back pressure, due to setting
Balance guide rod, balance guide rod due to being connected and valve rod between, is equivalent to a part for valve rod and balances guide rod and be located at bonnet
Left end so that for valve rod to the left with identical by oil pressure area to the right, therefore valve rod is in stress balance state, so solution
In prior art of having determined left and right compression area etc. do not lead to valve rod be subject to the right thrust and lead to auto reversive problem.
As the outline drawing of the allotter that Fig. 1-4 is the present invention, 5-6 is a-a sectional view.Actuator port a is provided with valve body
With b, oil-in p and oil return opening t, shown oil-in p is communicated with oil suction chamber 104, for providing pressure oil for allotter.By figure
5 and Fig. 6 it can be seen that allotter valve rod is in change when middle position and commutation two states.Fig. 7 is the main view of the valve element of check valve
Figure.Fig. 8, Fig. 9 are the structure chart of special-shaped seal ring.
Second end of described balance guide rod 6 is provided with a boss 601, and the left part of described valve rod 4 is provided with an end
Portion's screw 7, the right-hand member of described end screw 7 is inserted in the stem cavity 401 of the left part of described valve rod 4；Described end spiral shell
The left part of nail 7 is provided with one and described boss 601 shape identical groove, and described boss 601 is connected within described groove,
Make to be flexibly connected between described balance guide rod 6 and described valve rod 4.
In described bonnet 3, the first spring base 8, the second bullet are arranged with the outer peripheral face of described valve rod 4 and end screw 7
Spring abutment 9, back-moving spring 10 and positioning sleeve 11, described first spring base 8, second spring seat 9 and positioning sleeve 11 are from left to right successively
Setting, described back-moving spring 10 is arranged between described first spring base 8 and second spring seat 9, the right-hand member of described positioning sleeve 11
Portion is abutted against with described valve body 1, and described second spring seat 9 is abutted against with the left part of positioning sleeve 11, and valve rod 4 can be described fixed
Linear motion in position set 11 is thus compressing or loosening described back-moving spring 10；It is arranged at along institute inside described end screw 7
State the cavity of end screw 7 described in the axial penetration of end screw 7, set successively from left to right in the cavity of described end screw 7
Put lock-screw 12, pressure regulating screw 13, locking spring 14 and localization handspike 15；On the outer peripheral face of described localization handspike 15 left part
It is arranged with locking spring 14, the right-hand member of described localization handspike 15 is inserted in described stem cavity 401, and described localization handspike 15
Right part outer peripheral face on be provided with type conical bench；
Radial hole along described valve rod 4 valve rod 4 described in radial penetration is provided with the side face of described valve rod 4, described
Radial direction in the hole is provided with small ball 16, and described small ball 16 is abutted against with the type conical bench of the right part of described localization handspike 15；
It is provided with a positioning guide bracket 17 in described stem cavity, described positioning guide bracket 17 is located at the left side of described localization handspike 15,
It is provided with a guide rod seat 18, the left part of described guide rod seat 18 is fixedly installed one and leads in the inner chamber of described positioning guide bracket 17
Bar 19, described guide rod 19 is abutted against with the right part of described pressure regulating screw 13 after extending through described localization handspike 15 to the left；Institute
The right-hand member stating guide rod seat 18 is provided with pressure spring 20, and the right side of described guide rod seat 18 is additionally provided with a poppet valve core 21, described
Pressure spring 20 is located between described guide rod seat 18 and described poppet valve core 21；The right part of described poppet valve core 21 can be inserted in along
In the elongated hole 22 that described valve rod 4 direction extends and described elongated hole 22 can be blocked, with control described stem cavity 401 with described
Connection between elongated hole 22 and disconnection；The right-hand member of described elongated hole 22 is connected with the first oil duct 101 of valve body 1.
In the allotter of the present invention, valve rod has two kinds of working conditions, and one is middle position state, and two is commutation states.
As Fig. 5, valve rod is in middle position state, and now valve rod does not have action.When valve rod is in middle position state, now valve rod does not have
There is action, blocked by valve rod between oil suction chamber 104 and the first oil duct 101 and do not connect.Check valve does not have action, check valve steel ball
Positioned at the bottom of valve rod ball groove, nonreturn valve core pins, does not also connect between the first oil duct 101 and the second oil duct 102.Now, by
In valve rod middle position, back-moving spring is not compressed, inelastic to valve rod.
As Fig. 6, it is in commutation states after valve rod is to left movement, is connected between oil suction chamber 104 and the first oil duct 101,
Hydraulic oil enters the first oil duct 101 from oil suction chamber 104；Now by check valve steel ball jack-up upwards, check valve steel ball promotes valve rod
Nonreturn valve core moves upwards, and check valve is opened, and the first oil duct 101 is connected with the second oil duct 102.Now, due to nonreturn valve core
On be provided with two grades of guide waies, hydraulic oil through the compensating groove of two grades of guide waies, flows into the second oil duct, and check valve can be normally real
The one-way flow of existing fluid.
During commutation states, because valve rod moves, the distance between the first spring base and second spring seat reduce, back-moving spring
Compressed in the ball groove snapping in after now small ball is mobile on reversing cover inwall.Now, localization handspike is moved to the left, locking spring
It is positioned push rod compression and holds out against localization handspike, the type conical bench of localization handspike right-hand member tightly withstands steel ball so that steel ball card
Tightly in the ball groove on reversing cover inwall, now in the presence of small ball, locking spring, position is locked in commutation shape to valve rod
State.Without other external force, such as oil pressure changes or pulls handle by hand, and valve rod will be locked, and be fixed on commutation states.
During hand-reset, handle is pulled by staff, valve rod is drawn to the right, by ball from reversing cover inwall for the small ball
Pull out in groove, valve rod resets.
When automatically reseting, the oil pressure in oil suction chamber 104 increases.When the oil pressure in oil suction chamber 104 is to setting value, now enter
Hydraulic oil in oil pocket 104 will act on poppet valve core by elongated hole, and described poppet valve core is promoted to the left, and poppet valve core is to moving to left
Dynamic, hydraulic oil enters the right side of valve-rod cavity, and hydraulic oil pushes up positioning guide bracket to the left, and positioning guide bracket is moved to the left top positioning to the left again and pushes away
Bar, now because localization handspike is moved to the left, small ball is fallen in ball groove due to action of gravity, and valve rod is from locking state solution
Remove, now in the presence of back-moving spring, valve rod automatically moves right realization and automatically resets.
Due to employing the automatically fixed of the assembly compositions such as positioning sleeve, locking spring, positioning guide bracket, localization handspike, poppet valve core
Position resetting means, so that the allotter of the present invention passes through to control the pressure of oil suction chamber, realizes the auto-reset function of valve rod.
By adjusting pressure spring, the adjustable pressure value that automatically resets.
One seal groove is provided with the end face being matched with described valve body 1 on described bonnet 3, sets within described seal groove
It is equipped with a special-shaped seal ring 23.
In the allotter of the present invention, the mating surface that matches arranges profiled seal groove, such as scheme between bonnet and valve body
8-9, arranges corresponding special-shaped seal ring in profiled seal groove.Due to close by the way of setting sealing ring within seal groove
Envelope, is radial seal mode, sealing effectiveness is more preferable.Sealing ring adopts quality of rubber materials, it is to avoid adopt asbestos material harmful to human
The problem of health.Further, since sealing ring is located within bonnet and two sealing surfaces being superimposed with each other of valve body, do not expose machine
Surface, therefore not there is a problem of leakage of oil contamination dust, solve simultaneously using asbestos pad material due to permeability be infected with ash
Dirt and make the ugly problem of outward appearance.
Unidirectional valve pocket 103 is provided with described valve body 1, be provided with described unidirectional valve pocket 103 check valve back-moving spring 24,
Nonreturn valve core 25 and check valve steel ball 26；
Described nonreturn valve core 25 includes front end guide way 2501, middle connection body 2502 and tail end 2503；At described middle part
One two grades of guide way 2504 is provided with the outer peripheral face of connector 2502, described two grades of guide waies 2504 are provided with along institute
State the compensating groove 2505 axially penetrating through described two grades of guide waies 2504 of nonreturn valve core 25.
Described compensating groove is square groove.When valve rod moves right to working position, steel ball moves up, on nonreturn valve core
Rise, sealing releasing, the first oil duct 101 and the second oil duct between the tapered portion 2506 of the tail end bottom of nonreturn valve core and valve
102 are connected, and the front end guide way of nonreturn valve core lower end and valve still keep directly contact and sealing.The structure of nonreturn valve core
As shown in Figure 7.
In addition to front end guide way with check valve cavity wall directly contact, the outer peripheral face of two grades of guide waies of middle connection body
Still the internal face joint with unidirectional valve pocket.Now, the hydraulic oil in the first oil duct flows into the second oil duct by compensating groove
102, do not interfere with fluid and directly circulate in the first oil duct 101 and the second oil duct 102.It is additionally, since the valve element of check valve
Lower end and middle part all with valve pocket contact internal walls.Even if when hydraulic oil has pressure oscillation, the top of valve element also will not be with oil
Pressure fluctuation and double swerve.So, avoid asking of the friction aggravation between front end guide way and unidirectional valve pocket, sealing gasket
Topic, also will not occur the problem that the front end guide way periphery abrasion of the valve element of check valve and sealing gasket crush easily, extend
The service life of check valve it is thus also avoided that seal failure and cause and oil leakage phenomenon occur, ensure that the control accuracy of valve,
Improve the functional reliability of allotter.
Due to two grades of guide waies being provided with the middle connection body of nonreturn valve core, provide for check valve high-pressure opening state
Stable guidance quality, it is to avoid valve element lower end under the fluctuation of oil pressure and valve pocket between abrasion it is thus also avoided that seal failure and
Cause and oil leakage phenomenon occur, improve the service life of check valve and functional reliability so that check valve have good high steady
Qualitative.Only one two grades of guide way need to be processed on middle connection body, process on two grades of guide waies simultaneously and unload in processing
Lotus groove, the simple easy processing of structure.Due to being provided with compensating groove on two grades of guide waies, hydraulic oil can be made from the first oil duct
Interior second oil duct is flowed into by compensating groove, check valve can normally realize the one-way flow of fluid.
The allotter for tractor of the present invention, has following feature.
(1) when there is back pressure, due to be provided with balance guide rod so that for valve rod to the left and to the right by oil pressure area
Identical, therefore valve rod is in stress balance state, so solve in prior art left and right compression area not etc. not leading to valve rod to be subject to
Lead to auto reversive problem to thrust to the right.
(2) due to employing the automatic of the assembly compositions such as positioning sleeve, locking spring, positioning guide bracket, localization handspike, poppet valve core
Position reset device, so that the allotter of the present invention passes through to control the pressure of oil suction chamber, realizes the auto-reset function of valve rod.
(3) setting phase in profiled seal groove, profiled seal groove is arranged on the mating surface matching between bonnet and valve body
The special-shaped seal ring answered.Due to using sealing by the way of setting sealing ring within seal groove, being radial seal mode, sealing effect
Fruit is more preferably.
(4) due to two grades of guide waies being provided with the middle connection body of nonreturn valve core, it is check valve high-pressure opening state
Provide stable guidance quality, it is to avoid valve element lower end under the fluctuation of oil pressure and valve pocket between abrasion it is thus also avoided that sealing is lost
Effect and cause and oil leakage phenomenon occur, improve the service life of check valve and functional reliability so that check valve have good
High stability.
The allotter for tractor of the present invention, has and can ensure that valve element will not rock in pressure fluctuation, extend list
To valve service life, improve valve functional reliability the advantages of.
Ultimate principle, principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry
The simply present invention it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description for the personnel
Principle, without departing from the spirit and scope of the present invention the present invention also have various changes and modifications, these change and
Improvement both falls within the range of claimed invention.The protection domain of application claims by appending claims and its
Equivalent defines.
Claims (4)
1. it is used for the allotter of tractor, including valve body (1), protecgulum (2) and bonnet (3)；It is provided with valve rod in described valve body (1)
(4), the first end of described valve rod (4) is inserted within described bonnet (3), the second end of described valve rod (4) be inserted into described before
Within lid (2)；It is provided with handle (5) on described protecgulum (2)；One end of described handle (5) be inserted within described protecgulum (2) and
With described valve rod (4) phase clamping to pull valve rod (4) along the axial linear movement of valve rod (4) by pulling described handle (5)；
The other end of described handle (5) is pulled in order to manual outside stretching out in described protecgulum (2)；
Offer, on the end face of the one end away from described valve body (1) of described bonnet (3), the through hole penetrating described bonnet (3)
(301), it is provided with a balance guide rod (6) in described through hole (301)；The first end of described balance guide rod (6) stretches out in described
Outside bonnet (3), the second end of described balance guide rod (6) is inserted within described bonnet (3) and with described valve rod (4) first
End is flexibly connected；Described balance guide rod (6) being capable of axially moving along a straight line along described valve rod (4) in described through hole (301)；
In described bonnet (3), the outer peripheral face of described valve rod (4) and end screw (7) is arranged with the first spring base (8), the
Two spring bases (9), back-moving spring (10) and positioning sleeve (11), described first spring base (8), second spring seat (9) and positioning sleeve
(11) set gradually from left to right, described back-moving spring (10) be arranged at described first spring base (8) and second spring seat (9) it
Between, the right part of described positioning sleeve (11) and described valve body (1) abut against, described second spring seat (9) and positioning sleeve (11)
Left part abuts against, and valve rod (4) can move along a straight line thus compressing or loosening described back-moving spring in described positioning sleeve (11)
(10)；It is arranged at along end screw (7) described in the axial penetration of described end screw (7) inside described end screw (7)
Cavity, set gradually from left to right in the cavity of described end screw (7) lock-screw (12), pressure regulating screw (13), locking
Spring (14) and localization handspike (15)；It is arranged with locking spring (14), institute on the outer peripheral face of described localization handspike (15) left part
The right-hand member stating localization handspike (15) is inserted in described stem cavity (401), and the right part periphery of described localization handspike (15)
Type conical bench is provided with face；
Radial hole along valve rod (4) described in the radial penetration of described valve rod (4), institute are provided with the side face of described valve rod (4)
State radial direction in the hole and be provided with small ball (16), the type conical bench of the right part of described small ball (16) and described localization handspike (15)
Abut against；It is provided with positioning guide bracket (17) in described stem cavity, described positioning guide bracket (17) pushes away positioned at described positioning
The left side of bar (15), is provided with a guide rod seat (18), a left side for described guide rod seat (18) in the inner chamber of described positioning guide bracket (17)
End is fixedly installed a guide rod (19), described guide rod (19) extend through to the left described localization handspike (15) afterwards with described tune
The right part of pressure screw (13) abuts against；The right-hand member of described guide rod seat (18) is provided with pressure spring (20), described guide rod seat
(18) right side is additionally provided with a poppet valve core (21), and described pressure spring (20) is located at described guide rod seat (18) and described cone valve
Between core (21)；The right part of described poppet valve core (21) can be inserted in the elongated hole (22) extending along described valve rod (4) direction
Interior and described elongated hole (22) can be blocked, with control connection between described stem cavity (401) and described elongated hole (22) with
Disconnect；The right-hand member of described elongated hole (22) is connected with first oil duct (101) of valve body (1).
2. the allotter for tractor according to claim 1, is characterized in that, the second end of described balance guide rod (6)
It is provided with a boss (601), the left part of described valve rod (4) is provided with an end screw (7), described end screw (7)
Right-hand member be inserted in described valve rod (4) the stem cavity (401) of left part in；The left part of described end screw (7) is provided with
One is connected within described groove so that described put down with described boss (601) shape identical groove, described boss (601)
It is flexibly connected between weighing apparatus guide rod (6) and described valve rod (4).
3. the allotter for tractor according to claim 1, is characterized in that, with described valve body on described bonnet (3)
(1) seal groove is provided with the end face matching, within described seal groove, is provided with a special-shaped seal ring (23).
4. the allotter for tractor according to claim 1, is characterized in that, described valve body (1) is provided with unidirectional
Valve pocket (103), is provided with check valve back-moving spring (24), nonreturn valve core (25) and check valve steel in described unidirectional valve pocket (103)
Ball (26)；
Described nonreturn valve core (25) includes front end guide way (2501), middle connection body (2502) and tail end (2503)；Described
One two grades guide waies (2504) are provided with the outer peripheral face of middle connection body (2502), described two grades of guide waies (2504) set
Put the compensating groove (2505) axially penetrating through described two grades of guide waies (2504) along described nonreturn valve core (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140578.1A CN104728204B (en) | 2015-03-28 | 2015-03-28 | Distributor for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140578.1A CN104728204B (en) | 2015-03-28 | 2015-03-28 | Distributor for tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104728204A CN104728204A (en) | 2015-06-24 |
| CN104728204B true CN104728204B (en) | 2017-02-01 |
Family
ID=53452455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510140578.1A Active CN104728204B (en) | 2015-03-28 | 2015-03-28 | Distributor for tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104728204B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762899B (en) * | 2016-11-25 | 2019-02-05 | 合肥协力液压科技有限公司 | One kind automatically resets valve rod assembly |
| CN106930994B (en) * | 2017-05-09 | 2018-03-09 | 江苏力源液压机械有限公司 | Position floating reversal valve is jumped in the manual pressurize of tractor |
| CN107956757A (en) * | 2017-12-08 | 2018-04-24 | 山东弘宇农机股份有限公司 | A kind of multifunctional assembled hydraulic control valve |
| CN109162975B (en) * | 2018-09-19 | 2023-10-24 | 合肥长源液压股份有限公司 | Reversing valve plate with jumping and pressure maintaining functions for agricultural machinery |
| CN109779997A (en) * | 2019-02-19 | 2019-05-21 | 新乡市德恩智能工业有限公司 | A kind of hydraulic trigger-type automatically resets hydraulic valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08187037A (en) * | 1995-01-10 | 1996-07-23 | Hideo Sunaga | Apparatus for automatic stopping of hydrant for irrigation |
| US20080060709A1 (en) * | 2006-09-13 | 2008-03-13 | Ming-Dang Shieh | Adjustable water-dispersing device for a faucet |
| CN101235832B (en) * | 2007-02-02 | 2010-04-21 | 上海立新液压有限公司 | Hand-driven change valve |
| CN201866321U (en) * | 2010-11-04 | 2011-06-15 | 天津百利展发集团有限公司 | High-pressure adjustable multichannel distributing valve |
| CN202203193U (en) * | 2011-06-14 | 2012-04-25 | 连云港机床厂有限公司 | Multifunctional gear pump for band sawing machine |
| CN204025872U (en) * | 2014-08-29 | 2014-12-17 | 毅联实业(上海)有限公司 | Hand-operated direction valve for pneumatic motor |
| CN204493336U (en) * | 2015-03-28 | 2015-07-22 | 合肥长源液压股份有限公司 | For the distributor of tractor |
-
2015
- 2015-03-28 CN CN201510140578.1A patent/CN104728204B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104728204A (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104728204B (en) | Distributor for tractor | |
| CN202152857U (en) | Double valve seat adjustable valve | |
| CN104776078B (en) | There is the used with tractor allotter of auto-reset function | |
| CN108413083A (en) | A kind of double protection check valves | |
| CN204493334U (en) | There is the used with tractor distributor of auto-reset function | |
| CN204493336U (en) | For the distributor of tractor | |
| CN205371728U (en) | Quick off -load relief valve | |
| CN204493333U (en) | Be provided with the used with tractor distributor of high stability one-way valve | |
| CN104405908A (en) | Valve core component of corrugated pipe type double-base sleeve valve | |
| CN204493335U (en) | Be provided with the used with tractor distributor of balance guide rod | |
| CN104747522B (en) | Used with tractor distributor provided with balance guide rod | |
| CN104747521B (en) | Used with tractor distributor equipped with high stability check valve | |
| CN203879792U (en) | Self-circulation depressurization mechanical seal structure | |
| CN103090019A (en) | Regulating valve of axial flow sleeve | |
| CN102221103A (en) | Regulating valve with double valve seats | |
| CN201575196U (en) | Hydraulic pilot-control stop valve | |
| CN204083287U (en) | Bellows two-seater telescoping valve mangetic core assembly | |
| CN209025802U (en) | A kind of hydraulic hand-pump | |
| CN208546522U (en) | A kind of lime preheater push rod seal structure | |
| CN2699071Y (en) | Oilfield Balanced type cut-off valve | |
| CN210290770U (en) | Axial flow valve | |
| CN105202218A (en) | Top assembly type corrugated fixed ball valve | |
| CN209325118U (en) | A kind of novel cutoff valve | |
| CN203548967U (en) | End face seal structure for hydraulic forklift gearbox inching valve | |
| CN211649074U (en) | Single-seat regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |